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Service Guide

Agilent Technologies

PSG Signal Generators

This guide applies to the following signal generator models:

E8267C PSG Vector Signal Generator

E8257C PSG Analog Signal Generator

E8247C PSG CW Signal Generator

Due to our continuing efforts to improve our products through firmware and hardware revisions, signal

generator design and operation may vary from descriptions in this guide. We recommend that you use

the latest revision of this guide to ensure you have up-to-date product information. Compare the print

date of this guide (see bottom of page) with the latest revision, which can be downloaded from the

following website:

www.agilent.com/find/psg

Part Number: E8251-90259

Printed in USA

December 2003

Summary of content (291 pages)

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Service Guide Agilent Technologies PSG Signal Generators This guide applies to the following signal generator models: E8267C PSG Vector Signal Generator E8257C PSG Analog Signal Generator E8247C PSG CW Signal Generator Due to our continuing efforts to improve our products through firmware and hardware revisions, signal generator design and operation may vary from descriptions in this guide. We recommend that you use the latest revision of this guide to ensure you have up-to-date product information.
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Notice The material contained in this document is provided “as is”, and is subject to being changed, without notice, in future editions. Further, to the maximum extent permitted by applicable law, Agilent disclaims all warranties, either express or implied with regard to this manual and to any of the Agilent products to which it pertains, including but not limited to the implied warranties of merchantability and fitness for a particular purpose.
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Contents 1. Troubleshooting Electrostatic Discharge (ESD) Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2 Handling of Electronic Components and ESD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2 Getting Started with Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3 Running Self-Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Contents Troubleshooting Unlevels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-67 Troubleshoot and correct any unlock problems before troubleshooting unleveled problems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-67 Troubleshooting Adjustment Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-71 Troubleshooting ADC Adjustment Failures. . . . . . . . . . .
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Contents ALC Loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-106 Modulation (AM, FM, ΦM, and Pulse) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-107 Digital Modulation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-108 Approximate Device Gains and Losses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Contents Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16 A3 Power Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18 Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18 Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Contents Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-36 A18 CPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-38 Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-38 Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Contents Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-58 A23 Lowband Coupler/Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-60 Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-60 Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Contents Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-78 A30 Modulation Filter (Standard and Option 1EA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-80 Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-80 Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Contents Assemblies and Hardware Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6 Assemblies from the Inside Front Panel View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9 Assemblies from a Top View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10 Assemblies from the Inside Rear Panel View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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1 Troubleshooting • “Electrostatic Discharge (ESD) Information” on page 1-2 • “Getting Started with Troubleshooting” on page 1-3 • “A18 CPU Turn–On Test” on page 1-4 • “Self–Test Failures and Related Troubleshooting” on page 1-7 • “Troubleshooting Assembly–Level Problems” on page 1-10 • “Troubleshooting Unlocks” on page 1-64 • “Troubleshooting Unlevels” on page 1-67 • “Troubleshooting Adjustment Problems” on page 1-71 • “Troubleshooting ADC Adjustment Failures” on page 1-73 • “Troubleshooting Performance Te
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Troubleshooting Electrostatic Discharge (ESD) Information Electrostatic Discharge (ESD) Information WARNING The following techniques related to ESD and static–safe workstations should not be used when working on circuitry with a voltage potential greater than 500 volts. ESD can damage or destroy electronic components.
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Troubleshooting Getting Started with Troubleshooting Getting Started with Troubleshooting Referring to Table1-1: • determine where to begin troubleshooting • work on problems in the order they are presented in the table • use the descriptions provided in this chapter that explain how the signal generator operates, and the function of each assembly: the overall description (page 1-85), the synthesis loop (page 1-95), the RF path (page 1-103), and self–test (page 1-115). Table 1-1 If able to run self-test..
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Troubleshooting A18 CPU Turn–On Test A18 CPU Turn–On Test At turn–on, the A18 CPU is designed to complete a series of operational checks. If all power supply voltages are present and the A18 CPU is working correctly, the operational checks are completed. Errors are reported if the A18 CPU has problems identifying other assemblies or communicating with the backup memory located on the A31 Motherboard.
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Troubleshooting A18 CPU Turn–On Test Checking the A18 CPU Voltages 1. With the external and internal covers removed and the signal generator on its side, turn power on and check to see if all the power supply LEDs on the A31 Motherboard are on. If any of the power supply LEDs are not on, refer to “Power Supply Troubleshooting” on page 1-17 to troubleshoot. 2.
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Troubleshooting A18 CPU Turn–On Test No Instrument Control From the Front Panel Refer to “Front Panel Display Assembly Troubleshooting” on page 1-11. Error Messages If error messages are reported after the turn–on check is completed, refer to the Error Messages manual for details.
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Troubleshooting Self–Test Failures and Related Troubleshooting Self–Test Failures and Related Troubleshooting Table 1-4 Self-test Failures and Related Troubleshooting If this self–test fails... Go to this troubleshooting section...
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Troubleshooting Self–Test Failures and Related Troubleshooting Table 1-4 Self-test Failures and Related Troubleshooting (Continued) If this self–test fails... Go to this troubleshooting section...
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Troubleshooting Self–Test Failures and Related Troubleshooting Table 1-4 Self-test Failures and Related Troubleshooting (Continued) If this self–test fails... Go to this troubleshooting section...
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Troubleshooting Troubleshooting Assembly–Level Problems Troubleshooting Assembly–Level Problems This section provides the following: • “Front Panel Display Assembly Troubleshooting” on page 1-11 • “Power Supply Troubleshooting” on page 1-17 • “Self-Tests 1xx for the A13 I/Q Multiplexer” on page 1-30 • “Self–Tests 2xx: A5 Sampler Self–Test Errors” on page 1-32 • “Self–Tests 3xx: A7 Reference (Standard) Self–Test Errors” on page 1-34 • “Self–Tests 4xx: A8 Output Self–Test Errors” on page 1-35 • “Self–Tests 6
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Troubleshooting Troubleshooting Assembly–Level Problems Front Panel Display Assembly Troubleshooting Overview The Front Panel Display Assembly comprises the following: • a 640 x 320 pixels liquid crystal display (LCD) • a power switch/flat panel interface board, which contains the power on/off switch, standby LED, and power–on LED This board contains the circuitry to disable the power supply: in all models except the E8267C, the ON_OFF control line is pulled to a TTL low; for the E8267C, the logic is rever
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Troubleshooting Troubleshooting Assembly–Level Problems Symptom: Dark display 1. Ensure that the front panel green power on LED is on. If not, refer to “Power Supply Troubleshooting” on page 1-17. 2. Press any front panel key to disable the screen saver. 3. If the display is still bad, check P12 on the A31 Motherboard for the following signals: Signal State P12−1 −5.2 Vdc P12−3 LIGHT_EN >3 Vdc P12−4 VDISP Brightness = 50, VDSP < 50 mV Brightness = 1, VDSP = 3 Vdc • If the 5.
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Troubleshooting Troubleshooting Assembly–Level Problems Symptom: Bright display without characters 1. Ensure that the front panel green power on LED is on. If not, refer to “Power Supply Troubleshooting” on page 1-17. 2. Try adjusting the contrast controls. 3. Check the connection of the ribbon cable at J9 of the power switch/flat panel interface board. 4.
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Troubleshooting Troubleshooting Assembly–Level Problems 5. If all the signals measured in Step 4 are good, go to Step 6. If any of the signals measured in Step 4 are bad, check the following signals at P221 of the motherboard: Signal State P221−14 VLCD approximately 21 Vdc P221−53 LCD_ENABLE_H >3 Vdc P221-1 to 13, 15, 41, 43, 45, 47, 49 to 52 Refer to Figure 1-1 on page 13. If any of these signals are bad, change the CPU board. 6.
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Troubleshooting Troubleshooting Assembly–Level Problems Symptom: Hardkeys or softkeys do not work The A1 Keyboard contains the hardkeys and softkeys switches. The keys are arranged in a matrix (shown below) with the control lines KEYCOLx and KEYROWx on the x and y axis. When you press a hardkey or softkey, one cell of the matrix is activated; the normally TTL low KEYROWx of the active cell pulses high, and the normally TTL high KEYCOLx of the active cell pulses low.
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Troubleshooting Troubleshooting Assembly–Level Problems Symptom: RPG not working properly 1. Ensure that the front panel green power on LED is on. If it is not on, refer to “Power Supply Troubleshooting” on page 1-17. 2. Check the front panel operation by checking random hardkey operation. When the RPG works properly, DS1 on the CPU board blinks as the RPG knob rotates. 3. Check P13–12 for +5.2 Vdc. If the voltage is not present, refer to “Power Supply Troubleshooting” on page 1-17 for troubleshooting. 4.
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Troubleshooting Troubleshooting Assembly–Level Problems Power Supply Troubleshooting The power supply is a switching supply, with automatic line-voltage and frequency selection. Because of this, a switch is not required to set 115 VAC or 240 VAC operation. The input power line is fused, but the fuse is not replaceable; if the fuse opens, you must replace the power supply. WARNING After unplugging the instrument, wait 30 seconds to allow the supplies to discharge before removing or installing an assembly.
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Troubleshooting Troubleshooting Assembly–Level Problems Table 1-6 Power Supply vs. Assembly Matrix (2 of 3) Motherboard test points: +5.2 Digital +3.4 Digital +2.
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Troubleshooting Troubleshooting Assembly–Level Problems Table 1-7 Power Supply vs. Assembly Matrix (3 of 3) Motherboard test points: -15 Vdc -5.
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Troubleshooting Troubleshooting Assembly–Level Problems Table 1-8 E8267C, Option 520, Power Supply vs.
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Troubleshooting Troubleshooting Assembly–Level Problems Table 1-9 E8267C, Option 520, Power Supply vs. Assembly Matrix (2 of 5) Motherboard Test Points: +8 VA LED + 9 VDC Power Supply LED + 5.2 VDC +5.2 VAF P232-B1-3,C4-6,D1-3 LED + 5.
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Troubleshooting Troubleshooting Assembly–Level Problems Table 1-10 E8267C, Option 520, Power Supply vs. Assembly Matrix (3 of 5) Motherboard Test Points: Power Supply LED + 3.4D LED + 2.
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Troubleshooting Troubleshooting Assembly–Level Problems Table 1-11 E8267C, Option 520, Power Supply vs. Assembly Matrix (4 of 5) LED –5.2V Motherboard Test Points: LED –5.
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Troubleshooting Troubleshooting Assembly–Level Problems NOTE For all models except the E8267C, Option 520, use the Power Supply vs. Assembly Matrix tables 1-5 through 1-7, which begin on page 1-17. For the E8267C, Option 520, use the Power Supply vs. Assembly Matrix tables 1-8 through 1-12, which begin on page 1-20.
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Troubleshooting Troubleshooting Assembly–Level Problems Symptom: Instrument does not power up; power supply LEDs not on Checking Power Supplies Each of the power supplies has an LED on the bottom of the motherboard (see Figure 1-2 on page 26 and Figure 1-3 on page 27). When the power supply is functioning, the green LED lights. Use a DVM to measure the supplies on the motherboard, and ensure they meet the following power supply specifications.
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Troubleshooting Troubleshooting Assembly–Level Problems Figure 1-2 Motherboard Power Supply LEDs (1 of 2) Power Switch On/Off Line For all models except the E8267C, if the control line (ON/OFF) from the A3 Power Switch located in the front panel assembly goes to a TTL low state, or if the line impedance is less than 500 ohms, the power supply shuts down. This signal can be measured on the A31 Motherboard at pin 79 of P241.
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Troubleshooting Troubleshooting Assembly–Level Problems Figure 1-3 Motherboard Power Supply LEDs (2 of 2) To troubleshoot: 1. Turn the front panel switch on and ensure that the +15 Standby is good. 2. For all models except the E8267C, the ON/OFF control line should be > 3.5 Vdc. For the E8267C, the ON_OFF control line should be < 3.5 Vdc. The Power Switch/Flat-Panel Interface Board in the front panel assembly controls this signal.
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Troubleshooting Troubleshooting Assembly–Level Problems Symptom: Green front panel LED and power supply LEDs on motherboard blinking Overvoltage or Overcurrent The individual supplies in the instrument are not fused, but an overvoltage or overcurrent condition can shut them down. With either of these conditions, the front panel green LED and the power supply LEDs blink at approximately 2 Hz. The power supply tries to revive, but if the condition does not clear, the instrument stays in this mode.
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Troubleshooting Troubleshooting Assembly–Level Problems Symptom: –5.2 V2, +1.95 VD, +1.8 VD LEDs not on These supplies are generated by voltage regulators on the A31 Motherboard. Troubleshoot by checking the following voltages at the A19 Power Supply: • –7V, which is regulated down to –5.2 V2 • +3.4 VD, which is regulated down to +1.95 VD • +2.6 VD, which is regulated down to +1.
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Troubleshooting Troubleshooting Assembly–Level Problems Self-Tests 1xx for the A13 I/Q Multiplexer Power Supply Voltage (Vdc) A31 Motherboard Connector Pins Minimum (Vdc) Maximum (Vdc) +15 P152 – 28 +14.55 +15.45 Main Supply −15 P152 – 3 −15.45 −14.55 Main Supply +5.2 P152 – 5, 27 +5.04 +5.36 Main Supply −5.2 P152 – 1 −5.36 −5.04 A9 YIG Driver −5.2 V2 P152 – 26 −5.36 −5.04 A31 Motherboard +5.2 D P151 – 64, 65, 129, 130 +5.04 +5.
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Troubleshooting Troubleshooting Assembly–Level Problems 102 Ext In Offset DAC and Switch • Replace the A13 I/Q Multiplexer 103 Path 1 & 2 and Ext Out • Replace the A13 I/Q Multiplexer 104 Path 1: Attenuators and Summing Amp • Replace the A13 I/Q Multiplexer 105 Path 2: Attenuators and Summing Amp • Replace the A13 I/Q Multiplexer 106 DC–Couple Mode, CW bias DAC, Course+Fine DAC • Replace the A13 I/Q Multiplexer 107 Drift Canceller • Replace the A13 I/Q Multiplexer 108 IQ Polarity Switch • Replace the A13 I/
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Troubleshooting Troubleshooting Assembly–Level Problems Self–Tests 2xx: A5 Sampler Self–Test Errors Before proceeding to the reported self–test error code, check the following voltages. If any voltages are out of specification troubleshoot the supply problem first. Supply Voltage (Vdc) Connector Pins Minimum Value (Vdc) Maximum Value (Vdc) Origin +32 P22–7 +31.04 +32.96 Main Supply +15 P22–6, 21 +14.55 +15.45 Main Supply –15 P22–2, 17 –14.55 –15.45 Main Supply +5.2 P22–14, 29 +5.
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Troubleshooting Troubleshooting Assembly–Level Problems 201 Tuning + Bias Test 1. Turn power off and remove the A5 Sampler and connect a signal analyzer to the A5 Sampler J1 input cable on the A31 Motherboard. 2. Turn the signal generator on and check for the presence of a 1 GHz signal at the level of 0 dBm. 3. If the signal is good on the cable connector J1, replace the A5 Sampler. 4.
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Troubleshooting Troubleshooting Assembly–Level Problems Self–Tests 3xx: A7 Reference (Standard) Self–Test Errors Before proceeding to the reported self–test error code, check the following voltages. If any of the voltages are out of specification troubleshoot the supply problem first. Supply Voltage (Vdc) Connector Pins Minimum Value (Vdc) Maximum Value (Vdc) Origin +32 P102-7 +31.04 +32.96 Main Supply +15 P102-6, 21 +14.55 +15.45 Main Supply –15 P102-2, 17 –14.55 –15.
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Troubleshooting Troubleshooting Assembly–Level Problems Self–Tests 4xx: A8 Output Self–Test Errors Before proceeding to the reported self–test error code, check the following voltages. If any voltages are out of specification troubleshoot the supply problem first. Supply Voltage (Vdc) Connector Pins Minimum Value (Vdc) Maximum Value (Vdc) Origin +15 P52-6, 21 +14.55 +15.45 Main Supply −15 P52-2, 17 −15.45 −14.55 Main Supply +5.2 P52-14, 29 +5.04 +5.36 Main Supply +9 P52-5, 20 +8.
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Troubleshooting Troubleshooting Assembly–Level Problems 401 Prelevel Loop Test 1. With the signal generator powered up, carefully remove the A8 Output. 2. Set the signal generator to 3 GHz CW. 3. Using a spectrum analyzer measure the A6 Frac–N RF output at J4 of the A8 Output. The signal at J4 should be at 3 GHz and ≥0 dBm. • If the signal is not present, or is not at the correct level, replace the Frac–N. • If the signal is present, replace the A8 Output.
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Troubleshooting Troubleshooting Assembly–Level Problems 3. If both the I and Q signals are good, reconnect the cable removed in Step 2. Check the signals at the A8 Output board. a. At J53-8, repeat the Q offset check in Step 1. • If the signal is good, replace the A8 Output board. • If the signal is bad, replace the A31 Motherboard. b. At J53-19, repeat the I offset check in Step 2. • If the signal is good, replace the A8 Output board. • If the signal is bad, replace the A31 Motherboard.
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Troubleshooting Troubleshooting Assembly–Level Problems Self–Tests 6xx: A9 YIG Driver Self–Test Errors Before proceeding to the reported self–test error code, check the following voltages. If any are out of specification, troubleshoot the supply problem first. Supply Voltage (Vdc) Connector Pins Minimum Value (Vdc) Maximum Value (Vdc) Origin +32 P112-6 +31.04 +32.96 Main Supply +15 P112-5, 30 +14.55 +15.45 Main Supply –15 P112-4, 29 –14.55 –15.45 Main Supply +5.2 P112-3, 28 +5.
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Troubleshooting Troubleshooting Assembly–Level Problems A9 YIG Driver Output Voltages If any of the following voltages are out of specification, replace the A9 YIG Driver: Supply Voltage (Vdc) Connector Pins Minimum Value (Vdc) Maximum Value (Vdc) +9 P112-17, 18, 42 +8.82 +9.18 –5.2 P112-1, 2, 26, 27 –5.1 –5.3 –6 P112-19, 44 –5.88 –6.12 600 Post Regulator • Replace the A9 YIG Driver. 601 DACs • Replace the A9 YIG Driver. 602 PLL Interface 1.
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Troubleshooting Troubleshooting Assembly–Level Problems 605 Sweep Lock 1. Using an oscilloscope with high input impedance, measure the center pin of A9J9. Source Setup Oscilloscope Setup Start: 5 GHz 10 ms/div Stop: 10 GHz 5V/div Sweep: Freq 1 MΩ Sweep Time: Auto Sweep Repeat: Continuo us A positive and negative going signal should be present. • If the signal is present at A9J9, replace the A9 YIG Driver. 2.
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Troubleshooting Troubleshooting Assembly–Level Problems Self–Tests 7xx: A6 Frac–N Self–Test Errors Before proceeding to the reported self–test error code, check the following voltages. If any voltages are out of specification troubleshoot the supply problem first. Supply Voltage (Vdc) Connector Pins Minimum Value (Vdc) Maximum Value (Vdc) Origin +32 P32-7 +31.04 +32.96 Main Supply +15 P32-6, 21 +14.55 +15.45 Main Supply –15 P32-2, 17 –14.55 –15.45 Main Supply +5.2 P32-14, 29 +5.
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Troubleshooting Troubleshooting Assembly–Level Problems 702 Tuning Voltage 1. Using an oscilloscope, check 10 MHz Synthesis line on P33–15. The signal period should be 100 ns with an amplitude of approximately 3Vpp. • If the signal is good, replace the A6 Frac–N. 2. If the signal is bad, turn the signal generator power off, remove the A6 Frac–N, and measure the signal at P33–15 again. • If the signal is good, replace the A6 Frac–N. 3. If the signal is still bad, measure P41–5 on the A7 Reference.
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Troubleshooting Troubleshooting Assembly–Level Problems 704 Filter Test 1. Refer to Table1-13, and check J1 on the A6 Frac–N: a. Turn the signal generator on and remove the A6 Frac–N. b. Set the signal generator to the first center frequency. c. Use an extender board cable to connect a spectrum analyzer to J1. d. Tune the spectrum analyzer to the first J1 frequency, and check for the correct power. e. Repeat Step d for the remaining frequencies. • If all the signals at J1 are good, continue with Step 3.
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Troubleshooting Troubleshooting Assembly–Level Problems 705 F/2 Test 1. Using an oscilloscope, check the 10 MHz Synthesis line on P33–15. The signal period should be 100 ns with an amplitude of approximately 3Vpp. • If the signal is good, replace the A6 Frac–N. 2. If the signal is bad, turn the signal generator power off, remove the A6 Frac–N, and measure P33–15 again. • If the signal is good, replace the A6 Frac–N. 3. If the signal is still bad, measure P41–5 on the A7 Reference.
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Troubleshooting Troubleshooting Assembly–Level Problems Self–Tests 9xx: A10 ALC Self–Test Errors Before proceeding to the reported self–test error code, check the following voltages. If any voltages are out of specification troubleshoot the supply problem first. Supply Voltage (Vdc) Connector Pins Minimum Value (Vdc) Maximum Value (Vdc) Origin +32 P122-4 +31.04 +32.96 Main Supply +15 P122-28 +14.55 +15.45 Main Supply –15 P122-3, –14.55 –15.45 Main Supply +5.2 P122-2, 27 +5.04 +5.
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Troubleshooting Troubleshooting Assembly–Level Problems 901 Detector Test 1. Using a digital voltmeter, check J3 for –0.6 Vdc: a. Turn the signal generator’s RF power on. b. Set the frequency to 10 GHz and the RF power level to +20 dBm. c. Disconnect the cable from J3 of the A10 ALC (W15) and connect the cable to the voltmeter. • If the signal is not present, refer to highband RF loop troubleshooting. 2. If the signal is present, check J5 for –5.0 Vdc: a.
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Troubleshooting Troubleshooting Assembly–Level Problems Self–Tests 10xx: A7 Reference (Option UNR) Self–Test Errors Before proceeding to the reported self–test error code, check the following voltages. If any voltages are out of specification troubleshoot the supply problem first. Supply Voltage (Vdc) Connector Pins Minimum Value (Vdc) Maximum Value (Vdc) Origin +15 P42-6, 21 +14.55 +15.45 Main Supply –15 P42-2, 17 –14.55 –15.45 Main Supply +9 P42-5, 20 +8.82 +9.
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Troubleshooting Troubleshooting Assembly–Level Problems 1001 10 MHz Test 1. Using an oscilloscope, check P41–2 for a 10 MHz signal greater than 1.12 Vpp. If the signal is present, replace the A7 Reference. 2. If the signal is not present, replace the internal 10 MHz standard. 1002 1 GHz Test • Replace the A7 Reference.
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Troubleshooting Troubleshooting Assembly–Level Problems Self–Tests 11xx: A18 CPU Self–Test Errors 1100 Power Supply The A18 CPU self–test verifies the presence of the supplies listed. These supplies are not checked during the turn–on check and are not necessary for the turn–on check to pass. 1. After running self–test, View Details and see which supply failed. 2. If the 10 VRef has failed, replace the A18 CPU. The 10 VRef is generated on the A18 CPU and used for the ADC circuit. 3.
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Troubleshooting Troubleshooting Assembly–Level Problems 5. If a supply voltage is not present on the connector, measure the appropriate point listed in the following table: Connector P112 Supply Voltage Voltage Range Pin 1, 2, 26, 27 –5.2 Vdc –5.2 ± 0.1 Vdc Pin 19, 44 –6 Vdc –6 ± 0.1 Vdc Pin 17, 18, 42 +9 Vdc +9 ± 0.1 Vdc 6. If the voltage is present on P112 but not present on P223, replace the A31 Motherboard. 7. If the voltages are not present on P112, troubleshoot the A9 YIG Driver.
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Troubleshooting Troubleshooting Assembly–Level Problems Self–Tests 12xx: A26 MID Self–Test Errors Before proceeding to the reported self–test error code, check the following voltages in. If any of these voltages are out of specification troubleshoot the supply problem first. Supply Voltage (Vdc) E8267C Connector Pins All Other Models Connector Pins Minimum Value (Vdc) Maximum Value (Vdc) Origin +32 P201-11 P201-1 +31.04 +32.96 Main Supply +15 P201-12, 13, 14 P201-2, 3, 4 +14.55 +15.
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Troubleshooting Troubleshooting Assembly–Level Problems 1200 Power Supply 1. Press View Details, highlight Self Test 1200, then press View Details again. 2. From the displayed self–test results, determine which supply or supplies failed. 3. Refer to the following table; disconnect one microcircuit at a time and run self–test 1200. Microcircuit A26 MID +12V +8V +10V +9V −5.2V +5.
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Troubleshooting Troubleshooting Assembly–Level Problems 1203 40 GHz Doubler 1. Disconnect the 0 to 20 GHz cable between the A30 Modulation Filter and the A27 40 GHz Doubler, and connect a spectrum analyzer to the cable. 2. Tune the source from 250 kHz to 20 GHz, and record the lowest power level. 3. Disconnect the 10 to 20 GHz cable that comes from the A30 Modulation Filter, and connect the spectrum analyzer to this cable. 4. Tune the source from 20 GHz to 40 GHz, recording the lowest power level. 5.
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Troubleshooting Troubleshooting Assembly–Level Problems 1205 LB Pulse Mod Lowband Pulse On 1. Disconnect the cable from J5 of A10 ALC, and connect the cable to a DVM (this is the lowband detector output). 2. On the signal generator, set the following: Center Frequency: 3 GHz Power: +20 dBm Pulse Modulation: On Period: 40s Pulse Width: 10 ns RF: On 3. The voltage measured by the DVM should be approximately 0V.
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Troubleshooting Troubleshooting Assembly–Level Problems 1206 20 GHz IQ Modulator 1. If the power supplies 8V AF, 2.5V AF, 9V AFSW, 12V AFSW, 15V VLIMF, or −15VSWBIAS fail, refer to the table on page 1-52, and check the supplies used by the A35 I/Q Modulator as they leave A26 MID connector. If the signals are good at the A26 MID connector, replace the A35 I/Q Modulator. 2. If the VD724 Doubler, test index 6, fails, replace the A35 I/Q Modulator. 3. If self-test TC672RF indexes 8, 9, 11, or 12 fail: a.
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Troubleshooting Troubleshooting Assembly–Level Problems Self–Tests 13xx: A11 Analog/Pulse Modulation Generator Self–Test Errors Before proceeding to the reported self–test error code, check the following voltages. If any of these voltages are out of specification troubleshoot the supply problem first. Supply Voltage (Vdc) Connector Pins +15 P132-28 +14.55 +15.45 Main Supply –15 P132-3 –14.55 –15.45 Main Supply +5.2 P132-2, 27 +5.04 +5.37 Main Supply –5.2 P132-1, 26 –5.1 –5.
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Troubleshooting Troubleshooting Assembly–Level Problems 1301 Internal Pulse Generator Clock 1. Using an oscilloscope, measure P131–91 for a 10 MHz signal at 3.5 Vpp. • If the signal is good, replace the A11 Pulse/Analog Modulation Generator. 2. If the signal is bad, check P41–7. • If the signal is good on P41–7, replace the A31 Motherboard. • If the signal is bad on P41–7, replace the A7 Reference. 1302 Output • Replace A11 Pulse/Analog Modulation Generator.
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Troubleshooting Troubleshooting Assembly–Level Problems 1313 Amplitude Modulation • Replace A11 Pulse/Analog Modulation Generator. 1314 External 1 • Replace A11 Pulse/Analog Modulation Generator. 1315 External 2 • Replace A11 Pulse/Analog Modulation Generator. 1316 AM Path Loss • Replace A11 Pulse/Analog Modulation Generator.
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Troubleshooting Troubleshooting Assembly–Level Problems Self-Tests 16xx for the A14 Baseband Generator (Option 002/602) Power Supply Voltage (Vdc) A31 Motherboard Connector Pins Minimum (Vdc) Maximum (Vdc) Origin +32 P162 - 4 +31.04 +32.96 Main Supply +15 P162 - 28 +14.55 +15.45 Main Supply -15 P162 - 3 -15.45 -14.55 Main Supply -5.2 V2 P162 – 1, 26 -5.36 -5.04 A31 Motherboard +5.2 P162 – 5, 27 +5.04 +5.36 Main Supply +5.2 D P161 – 64, 65, 129, 130 +5.04 +5.
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Troubleshooting Troubleshooting Assembly–Level Problems 1600 Host <–> BBG Comm • If the +3.4 VD, +2.6 VD, and +1.9 VD supply voltages are good on the A31 Motherboard, replace the A14 Baseband Generator. • If the +3.4 VD or +2.6 VD supply voltages are bad on the A31 Motherboard, check the origin of the supply. — If the supply voltage is good at the origin, replace the A31 Motherboard. — If the supply voltage is bad at the origin, troubleshoot the A19 Power Supply. • If the +1.
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Troubleshooting Troubleshooting Assembly–Level Problems 1608 VCO Tune Test • If the +32 V, ±15V, –5.2 V2, and + 5.2V supply voltages are good on the motherboard, use an oscilloscope to check the 10 MHz signal on the A31 Motherboard at P161 pins 26 and 91. The signal should have a period of 100 ns with an amplitude greater than 0.4 Vpp. — If the 10 MHz signal is good, replace the A14 Baseband Generator. — If the 10 MHz signal is bad, check it at the A7 Reference.
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Troubleshooting Troubleshooting Assembly–Level Problems Self–Tests 22xx: A8 Output Self–Test Errors Before proceeding to the reported self–test error code, check the following voltages. If any voltages are out of specification troubleshoot the supply problem first. Supply Voltage (Vdc) Connector Pins Minimum Value (Vdc) Maximum Value (Vdc) +15 P52-6, 21 +14.55 +15.45 Main Supply –15 P52-2, 17 –14.55 –15.45 Main Supply +5.2 P52-14, 29 +5.04 +5.36 Main Supply +9 P52-5, 20 +8.82 +9.
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Troubleshooting Troubleshooting Assembly–Level Problems 3. Connect a spectrum analyzer to the A6 Frac–N RF output at J4 of the A8 Output. The signal at J4 should be at 3 GHz and ≥0 dBm. • If the signal is not present or at the correct level, replace the Frac–N. • If the signal is present, replace the A8 Output. WARNING Do not re–install the A8 Output with the signal generator powered on. This can cause serious damage to the signal generator. 2202 Switching Filter Test • Replace the A8 Output.
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Troubleshooting Troubleshooting Unlocks Troubleshooting Unlocks The phase lock loop refers to part of the frequency generating circuit used to maintain the phase relationship between the frequency generation loop and a reference frequency. By maintaining the phase relationship the frequency accuracy of the signal generator is guaranteed. To maintain frequency accuracy the phase lock loop compares the phase of a signal from the reference assembly to the phase of the frequency loop signal.
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Troubleshooting Troubleshooting Unlocks 515 10 MHz Signal Bad A 515 10 MHz Signal Bad message indicates a problem on the A7 Reference. A7 Reference (Standard) • Replace the A7 Reference. A7 Reference (Option UNR) 1. Check the 10 MHz signal into the A7 Reference from the 10 MHz standard. 2. The signal should be 10 MHz 1.8 Vpp into 1 MΩ. 3. If the 10 MHz signal is bad, replace the A32 10 MHz Crystal Oscillator. 4. If the signal is good, replace the A7 Reference.
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Troubleshooting Troubleshooting Unlocks 625 Internal Pulse Generator Unlock A 625 internal pulse generator unlocked message indicates a failure on the A11 Pulse/Analog Modulation Generator. • Replace the A11 Pulse/Analog Modulation Generator. 626 Internal Mod Source Unlock A 626 Internal Mod Source Unlock error message indicates a problem with the digital 10 MHz signal to the A11 Pulse/Analog Modulation Generator.
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Troubleshooting Troubleshooting Unlevels Troubleshooting Unlevels A leveled output power is obtained comparing a detected voltage with a reference voltage. The reference voltage is generated using DACs on the A10 ALC and the detected voltage is generated by coupling off a portion of the RF output signal and converting it to dc using detector diodes. When the reference and detected levels are the same the integrated output level remains constant.
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Troubleshooting Troubleshooting Unlevels b. Connect the RF output of the signal generator to the spectrum analyzer. Measure and record the minimum power level. c. Set the signal generator and spectrum analyzer start/stop frequencies to the next start/stop frequencies in Table1-15. Repeat step b above. Table 1-15 Signal Generator Spectrum Analyzer Start Stop Start Stop 3.2 GHz 20 GHz 3.15 GHz 20 GHz 20 GHz 19.5 GHz 40 GHz 40 GHz d.
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Troubleshooting Troubleshooting Unlevels 4. For each of the failed conditions listed, always start with the signal generator set to the following settings. • • • • • ALC Mode ALC Off Amplitude +30 dBm Attenuator Hold Mod On RF On Modulation Off Conditions: 5. Unleveled only between 250 kHz and 2 GHz. If the unleveled problem only occurs between 250 kHz and 2 GHz, the problem is most likely the A23 Lowband Coupler/Detector. a. Checking the A23 Lowband Coupler/Detector: • Set the signal generator to 1.
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Troubleshooting Troubleshooting Unlevels unleveled. • Connect a power meter or spectrum analyzer to the RF output connector. • Using the RPG adjust the power until the measured power level is +9 dBm. If the power can not be adjusted to this level, troubleshoot the RF path. • Remove the cable from J3 on the A10 ALC and measure the dc voltage on the center pin of the cable. The dc voltage should be –0.150 mVdc ±0.05 Vdc. • Set the power level to 0 dBm and repeat the center pin measurement.
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Troubleshooting Troubleshooting Adjustment Problems Troubleshooting Adjustment Problems When an adjustment does not work or fails to resolve a problem and all self–tests have passed, use the following table to locate the most likely failure. Table 1-17 Troubleshooting Help for Failed Adjustments Adjustment that is failing... Assemblies most likely causing failure...
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Troubleshooting Troubleshooting Adjustment Problems Table 1-17 Troubleshooting Help for Failed Adjustments (Continued) Adjustment that is failing... Assemblies most likely causing failure... Attenuator Calibration-Highband and Low Power AT1 RF Path ALC Modulator Calibration A30 Modulation Filter A8 Output AM Gain Calibration A11 Pulse Modulation Generator Gain Adjustment Bypass Calibration (Frequencies ≤ 3.
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Troubleshooting Troubleshooting ADC Adjustment Failures Troubleshooting ADC Adjustment Failures The ADC adjustment adjusts the ADC reference voltage to match the A18 CPU +10 Vdc reference. There are three reasons the adjustment could fail: • problems with the +10 Vdc reference • A18 CPU problems • analog mux on another assembly is starting to fail Procedure: 1. Run self–test 1100. If self–test 1100 passes, the +10 Vdc reference is good; proceed to step 2. 2.
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Troubleshooting Troubleshooting Performance Test Problems Troubleshooting Performance Test Problems If a performance test fails and all self–tests pass, use the following to find the most likely failure: Performance test that is failing... Action to perform... Maximum Leveled Output Power Refer to “Troubleshooting the RF Path” on page 1-76.
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Troubleshooting Troubleshooting Performance Test Problems Performance test that is failing... Action to perform... Digital Modulation Power Relative to CW Perform I/Q and digital calibrations.
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Troubleshooting Troubleshooting the RF Path Troubleshooting the RF Path Troubleshooting RF Path procedure: • • • • • preset the signal generator set a frequency open ALC loop (ALC Off) set signal generator to maximum power check power levels in the RF path (power levels are included on the RF block diagram) ALC and RF problems 1. Run a full self–test and troubleshoot any reported failures before proceeding. 2. From Table1-18 determine the frequencies where the problem occurs.
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Troubleshooting Troubleshooting the RF Path • Power Search Manual • Do Power Search 4. Using the RF Path Block Diagram, check the power levels at the points shown. 5. Once the problem is located, verify any cable between assemblies is good before replacing the assembly. 6. To measure the A6 Frac–N output level, with the signal generator on, remove the A8 Output and probe the right hand mmx connector’s center pin. The power level should be ≥+5 dBm.
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Troubleshooting Troubleshooting the RF Path (W17). Probe the end of the cable. Compare the results with Table1-20. Table 1-20 Pulse On Pulse Off +5 Vdc 0 to +5 Vdc (pulses at modulation rate) 12. If the signal levels are good, replace the A30 Modulation Filter. 13. if the signal levels are bad, replace the A11 Pulse/Analog Modulation Generator.
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Troubleshooting Troubleshooting the RF Path Troubleshooting AT1 Attenuator Starting from +25 dBm, the attenuator steps when the power is changed from between +5.1 dBm and +5.0 dBm. Continuing to lower the power level, the next switch occurs between –4.99 dBm and –5.0 dBm. The next change is between –14.99 dBm and –15.0 dBm and so on. The last change occurs between –104.99 dBm and –105.0 dBm. 1.
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Troubleshooting Troubleshooting Harmonic Spurious Troubleshooting Harmonic Spurious Harmonics are multiples of the output frequency. The second harmonic is two times the output frequency at an x dBc down. If the harmonic falls beyond the frequency range of the signal generator, the harmonic is not specified or measured.
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Troubleshooting Troubleshooting Harmonic Spurious 11. If the harmonic level is >–55 dBc, replace the A30 Modulation Filter. 20 GHz Models Harmonic problems with a fundamental frequency between 3.2 GHz and 20 GHz 1. Set the signal generator as follows: • Frequency: set to harmonic frequency to be measured • Amplitude: +10 dBm • ALC Off • Amplitude Power Search (softkey) 2. Remove the cable from the A29 20 GHz Doubler J2. Connect the spectrum analyzer to A29 20 GHz Doubler J2. 3.
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Troubleshooting Troubleshooting Harmonic Spurious • ALC Off • Amplitude Power Search (softkey) 2. Remove the cable from the A30 Modulation Filter J2 (W31). Connect the spectrum analyzer to A30 Modulation Filter J2. 3. Set the spectrum analyzer to the harmonic frequency and press marker peak search and delta marker. 4. Set the signal generator frequency to the fundamental frequency of the harmonic. 5. Using the delta marker, read the harmonic power level on the spectrum analyzer.
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Troubleshooting Troubleshooting Non–Harmonic Spurious Troubleshooting Non–Harmonic Spurious There are nine different groupings a spur can fall into. The grouping determines what assembly is most likely generating the spur. The procedure for troubleshooting spurs is to identify the grouping based on failing a performance test, checking for loose or broken cables or castings, and replacing the assembly.
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Troubleshooting Troubleshooting Option UNR Phase Noise Troubleshooting Option UNR Phase Noise Poor grounds or shielding problems in either the test environment or the measurement system can cause the phase noise measurement to fail. Physical vibration is another common cause of phase noise. Before performing a phase nose measurement make sure all covers are installed, the work surface is free of physical vibrations, and the phase noise system is working properly.
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Troubleshooting Overall Description Overall Description The overall description provides a functional overview of the Agilent PSG signal generators. Some of the functional blocks discussed are common to may types of instruments, while others are more specific to analog and digital signal generators.
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Troubleshooting Overall Description A18 CPU The A18 CPU controls all activities in the signal generator: • translating information entered from the front panel keys, LAN, GPIB, or Auxiliary Interface (RS–232) into machine level instructions • communicating translated instructions on the internal buses • monitoring critical circuits for problems, such as unleveled and unlocked conditions • reporting (on the front panel display) any problems with critical circuits Input/Output Interface Front Panel The sign
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Troubleshooting Overall Description not installed. Frequency Generation The YIG oscillator generates frequencies from 3.2 to 10 GHz. Output Oscillator Frequency Frequency < 250 MHz Path 3.2 to 10 GHz 100 kHz to 3.2 GHz 4 to 8 GHz > 3.2 GHz 3.2 to 10 GHz Lowband path, and part of highband path Highband path Notes A6 Frac–N signal is mixed with a 1 GHz signal on the A8 output assembly; the difference is used to generate the lower frequencies.
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Troubleshooting Overall Description low frequency signals flow to the front panel through the highband path. Frequency Control CW Mode The A9 YIG Driver, A18 CPU, A7 Reference, A5 Sampler, and A6 Frac–N establish frequency accuracy and stability. This circuitry is commonly referred to as a phase lock loop (PLL). In CW operation, the A18 CPU programs the A9 YIG Driver pre–tune DAC to output a voltage that coarsely tunes the YIG oscillator to the desired frequency.
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Troubleshooting Overall Description Output Power Level/Automatic Leveling Control The output power control circuitry, commonly referred to as the ALC loop, comprises the following: • Two detectors: the A23 Lowband Coupler/Detector (frequencies ≤2 GHz) and the A24 Highband Coupler/A25 Highband Detector (frequencies >2 GHz). Note: this is not the same frequency breakpoint as defined by the lowband and highband paths. The couplers couple off a small portion of the RF signal and route it to the detectors.
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Troubleshooting Overall Description Digital Modulation The I/Q modulator circuits in the A8 Lowband, A35 3–20 GHz I/Q Modulator and the A13 I/Q Multiplexer provide digital modulation. The A13 I/Q Multiplexer provides the circuitry to generate the desired phase shifts and to drive the I and Q modulators. A baseband generator (Option 002/602) can be added to generate complex waveforms.
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Synthesis Loop Microwave / RF Path A9 YIG Driver FM Driver Trigger & Timing Control Phase Lock Interface Pretune Sweep Generator A26 Microwave Interface Deck FM Coil Sweep Out DAC Main Coil A28 YIG 3.2 to 10 GHz Oscillator 3.2 to 20 GHz A29 20 GHz Doubler 250 KHz to 20 GHz A30 Modulator Filter Sweep Level Control 10 GHz to 20 GHz 250 kHz to 3.
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Synthesis Loop Microwave / RF Path A9 YIG Driver FM Driver Trigger & Timing Control Phase Lock Interface Pretune Sweep Generator A26 Microwave Interface Deck FM Coil Sweep Out DAC Main Coil A28 YIG 3.2 to 10 GHz Oscillator A29 20 GHz Doubler 3.2 to 20 GHz A35 3-20 GHz I/Q Mod Sweep Level Control 250 kHz to 3.2 GHz YO Phase Lock AT1 115 dB Attenuator A24 Coupler A30 Modulator Filter RF Output 250 kHz to 20 GHz or 250 kHz to 40 GHz A25 Detector 3.2 to 10 GHz 3.
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Troubleshooting Reference/Synthesis Loop Description Reference/Synthesis Loop Description This description covers generating CW and swept signals at frequencies from 3.2 to 10 GHz. For information on generating other frequencies, see the “Overall Description” on page 1-85. The Reference/Synthesis Loop establishes the frequency characteristics of the signal generator.
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Troubleshooting Reference/Synthesis Loop Description Ramp Sweep (Option 007) The following basic functions are required to generate an accurate sweep in ramp sweep mode: • coarse and fine tune • sweep rate control • sweep generation • output frequency monitoring or feedback Example (start 3.2 GHz, stop 10 GHz, sweep rate 50 ms) The A18 CPU sets the A9 YIG Driver Sweep DAC for a +3.2V output, which results in a YIG oscillator output of approximately 3.2 GHz. To sweep the instrument from 3.
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Troubleshooting Reference/Synthesis Loop Description A5 Sampler (CW mode only) The A5 Sampler contains a microwave sampler used to convert a portion of the YIG oscillator output frequency to an IF frequency for phase comparison. The A5 Sampler VCO provides the LO input to the RF sampler (the RF is the YIG oscillator signal). The A5 VCO output frequency (LO input) is set between 618 and 905 MHz. The sampler output is an IF signal between 30 and 64 MHz.
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Troubleshooting Reference/Synthesis Loop Description A9 YIG Driver CW Mode The A9 YIG Driver provides the YIG oscillator tune voltage. Coarse tuning of the YIG Oscillator occurs when the A18 CPU sets the pre-tune DACs output voltage to a value that sets the YIG oscillator frequency close to the desired frequency. 3.2 volts out of the pre-tune DAC results in a 3.2 GHz YIG oscillator output.
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Troubleshooting Reference/Synthesis Loop Description A28 YIG Oscillator (YO) The YIG oscillator output frequency (3.2 to 10 GHz) is controlled by the amount of current through the main and FM coils. The main coil is used to set the frequency, and for FM ≤230 Hz. The FM coil is used for FM rates >230 Hz. A29 20 GHz Doubler The A29 Doubler provides: • a thru path for output frequencies from 3.2 to 10 GHz • two internal couplers that provide a 3.
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Troubleshooting Reference/Synthesis Loop Description 1-100
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A6 Frac-N (Fine Tune) MOD_CONTROL H_FM_INV A9 YIG Driver Lowband Frec-N Divide J1 Zo L_SD_OFF 1 MHz PM L_FM_OFF 0.1 MHz PM FM_OUT_ BAND_ DAC Control SD Mod 16 3 2 Frac-N Prescaler Control YTO_FM Source Settled Indicators Sweep_DAC 3.2-10V J1 L_RST YIG Pre-tune DAC 5 MHz Loop Filter & Lead-Lag Phase Detector VCO Tune Reference Input 10 MHz TCXO 7 Out of lock Detector >3.2 - 20 GHz 13-16 Ramp Sweep Pretune Speedup J4 to A5 Sampler 3.
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Troubleshooting RF Path Description (Frequency Generation, Level Control, and Modulation) RF Path Description (Frequency Generation, Level Control, and Modulation) The RF path can divide, pass through, and multiply the A28 YIG Oscillator (YO) signal to generate the desired RF frequency. Depending on models and options, the RF path includes the hardware for amplitude, pulse, and digital (I/Q) modulation, and to control the RF output power level.
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Troubleshooting RF Path Description (Frequency Generation, Level Control, and Modulation) the A30 Modulation Filter (in analog models) or to the 3 to 20 GHz I/Q Modulator (in vector models). A6 Frac–N The A6 Frac–N is part of the Synthesis Loop and the RF lowband path. The RF signal from the A29 20 GHz Doubler is amplified, filtered, divided (dividers generate RF output frequencies below 3.2 GHz), and then amplified again before being routed to the A8 Output.
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Troubleshooting RF Path Description (Frequency Generation, Level Control, and Modulation) A30 Modulation Filter Because one function of the A30 Modulation Filter is to switch the highband and lowband frequency paths to a common path, the output frequency range of the A30 Modulation Filter is 100 kHz to 20 GHz. For frequencies >3.2 GHz, the A30 Modulation Filter provides amplitude and pulse modulation circuitry, power level control, and filtering. Frequencies <3.
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Troubleshooting RF Path Description (Frequency Generation, Level Control, and Modulation) <3.2 GHz Fast Pulse Modulator (Option 1E6) Option 1E6 provides improved pulse performance below 3.2 GHz. This option is installed in the lowband path between the A8 Output and the A23 Lowband Coupler Detector. The pulse drive signal is electrically switched from the A8 Output to the 1E6 assembly, and the pulse diode on the A8 Output is biased on, allowing the RF signal to pass through.
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Troubleshooting RF Path Description (Frequency Generation, Level Control, and Modulation) Level accuracy is a function of the detector and instrument calibration. Because the instrument is calibrated with internal detectors, external level accuracy depends on the voltage difference between the internal and external detectors at any given RF power level and the difference in linearity between the internal and external detectors.
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Troubleshooting RF Path Description (Frequency Generation, Level Control, and Modulation) Pulse Pulse modulation signals from the A11 Pulse/Analog Modulation Generator are routed directly to the A8 Output and the A30 Modulation Filter pulse diodes. Pulse diodes must be biased on to pass RF signals. Circuitry on the A8 Output and A30 Modulation Filter keep the pulse diodes turned on in instruments that do not have modulation capability.
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Troubleshooting RF Path Description (Frequency Generation, Level Control, and Modulation) Generator, and is used to drive the pulse modulators on the A8 Output and A30 Modulation Filter. The Burst Pulse signal is used by the digital modulation formats to synchronize the main RF path and ensure maximum on/off level ratio. The I and Q output signals are the main signals out of the A14 Baseband Generator.
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Troubleshooting RF Path Description (Frequency Generation, Level Control, and Modulation) Approximate Device Gains and Losses Item # 1 Device Gain/Loss Value (dB) Analog Instruments Vector Instruments ✓ ✓ A8 Output non-1EA N/A > 17 1EA N/A > 20 2 A12 Opt 1E6 Pulse Mod.
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A26 Micro Interface Deck A9 YIG Driver to / from A6 DBL40_LPF DBL20_AMP_ON_H Sweep Start / Stop Retrace (Rear Pnl) Z-axis / Blanking (Rear Pnl) Stop Sweep (Rear Pnl) Sweep Level (to A10) Sweep Control Programmerable Counter Programmerable Counter 10MHz Ref DBL20_PATH 3.2-10V +32 V 5 (cw) J1 100Hz YIG (cw) 3-10 Ramp Sweep Pretune Speedup MODF_AMP_ON_H 750 MHz 4 3-20 10-20 X2 Doubler 10-13 230 7 J1 J4 to A5 Sampler 3.
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A26 Micro Interface Deck A9 YIG Driver to / from A6 A13 I/Q Mux Ext 14 I/Q A Bus Sweep Start / Stop Retrace (Rear Pnl) Z-axis / Blanking (Rear Pnl) Stop Sweep (Rear Pnl) Sweep Level (to A10) Sweep Control Programmerable Counter Programmerable Counter 10MHz Ref 3.2-10V +32 V J1 A28 YIG 3-10 3-10 6 YIG Pre-tune DAC Main Coil 100Hz (cw) YIG S 10-13 10-20 X2 Doubler 4 H_Speedup Enable J4 to A5 Sampler 3.
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Troubleshooting Self-Test Overview Self-Test Overview A group of tests (self-tests) are embedded in the signal generator’s firmware that can evaluate the condition of the circuitry on many of the assemblies. Self-tests check hardware performance under controlled conditions, and compare test results to predetermine limits. If the results fall within the limits the signal generator passes.
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Troubleshooting Contacting Agilent Technologies Contacting Agilent Technologies If you have a problem with your signal generator, contact your nearest sales and service office (refer to page 1-118).
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Troubleshooting Contacting Agilent Technologies Describe the problem: 1-117
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Troubleshooting Contacting Agilent Technologies Agilent Sales and Service Offices Sales and service offices are located around the world to provide complete support for your signal generator. To obtain servicing information, contact the nearest Agilent Sales and Service office listed below. For information on ordering parts refer to “Ordering Information” on page 1-2. By internet, phone, or fax, get assistance with all your test and measurement needs. Online assistance: www.agilent.
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Troubleshooting Contacting Agilent Technologies Packaging a Signal Generator for Return 1. Use the original packaging materials or a strong shipping container that is made of double-walled, corrugated cardboard with 159 kg (350 lb.) bursting strength. The carton must be both large enough and strong enough to accommodate the signal generator and allow at least 3 to 4 inches on all sides of the signal generator for packing material.
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Troubleshooting Contacting Agilent Technologies 1-120
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2 Assembly Replacement 2-1
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Assembly Replacement Before You Replace an Assembly Before You Replace an Assembly CAUTION Many of the assemblies in this instrument are very susceptible to damage from electrostatic discharge (ESD). Perform service procedures only at a static-safe workstation and wear a grounding strap. Be sure to review the warning and caution statements described in Chapter 5, "Safety and Regulatory," on page 5-1, prior to replacing an assembly in your signal generator.
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Assembly Replacement Assemblies That You Can Replace Assemblies That You Can Replace • "Outer Instrument Cover" on page 2-5 • "Inner Instrument Cover" on page 2-7 • "Front Panel" on page 2-9 • "A1 Keyboard" on page 2-12 • "A2 Display" on page 2-14 • "A2DS1 Display Backlight" on page 2-16 • "A3 Power Switch" on page 2-18 • "A4 Inverter" on page 2-20 • "A5 Sampler, A6 Frac-N, A7 Reference (Standard and Option UNR), and A8 Output" on page 2-22 • "A9 YIG Driver" on page 2-24 • "A10 ALC" on page 2-26 • "A11 Pul
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Assembly Replacement Assemblies That You Can Replace • "A30 Modulation Filter (Standard and Option 1EA)" on page 2-80 • "A31 Motherboard (E8247C/57C)" on page 2-83 • "A31 Motherboard (E8267C)" on page 2-86 • "A32 10 MHz Crystal Oscillator (Option UNR)" on page 2-90 • "A33 6 dB PAD" on page 2-92 • "A34 Internal Hard Drive (E8267C Models Only)" on page 2-94 • "A35 3-20 GHz I/Q Modulator (E8267C Models Only)" on page 2-96 • "B1 Fan" on page 2-98 2-4
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Assembly Replacement Outer Instrument Cover Outer Instrument Cover Tools Required • T-15 driver • T-20 driver Removal Procedure Refer to Figure 2-1 for this procedure. 1. Disconnect the power cord. 2. Using the T-20 driver, loosen and remove the two screws (1) and remove the strap handle (2). 3. Using the T-15 driver, remove the center screws (3) from the four rear-panel feet (4). 4. Remove the four bottom feet (5) from the cover by lifting the tab and sliding the foot toward the tab. 5.
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Assembly Replacement Outer Instrument Cover Figure 2-1 2-6 Outer Instrument Cover Removal
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Assembly Replacement Inner Instrument Cover Inner Instrument Cover Tools Required • T-10 driver Removal Procedure Refer to Figure 2-2 for this procedure. 1. Disconnect the power cord. 2. Remove the outer-cover from the signal generator. Refer to "Outer Instrument Cover" on page 2-5. 3. Place the signal generator flat and upright with the front panel facing you. 4. Using the T-10 driver, remove the twelve screws (1) from the inner cover (2). 5. Remove the inner cover.
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Assembly Replacement Inner Instrument Cover Figure 2-2 2-8 Inner Instrument Cover Removal
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Assembly Replacement Front Panel Front Panel Tools Required • T-10 driver • T-15 driver • needle-nose pliers Removal Procedure NOTE To remove the Front Panel on signal generators with Option 1EM, complete steps 1 through 6 and steps 20 through 23. Refer to Figure 2-3 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to "Outer Instrument Cover" on page 2-5 and "Inner Instrument Cover" on page 2-7. 3.
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Assembly Replacement Front Panel • W49 (I IN) from the A35J7 (E8267C only). • W50 (Q IN) from the A35J8 (E8267C non 1EM signal generators only). • W51 (DATA) from the A31J500 (E8267C non 1EM signal generators only). • W52 (DATA CLOCK) from the A31J501 (E8267C non 1EM signal generators only). • W53 (SYMBOL SYNC) from the A31J502 (E8267C non 1EM signal generators only). 9. Disconnect the A1W1 display cable from the A31 Motherboard P13. 10. Disconnect the A4W1 inverter cable from the A31 Motherboard P12. 11.
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Assembly Replacement Front Panel Figure 2-3 Front Panel Removal 2-11
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Assembly Replacement A1 Keyboard A1 Keyboard Tools Required • T-10 driver Removal Procedure Refer to Figure 2-4 for this procedure. 1. Disconnect the power cord. 2. Remove the front panel. Refer to "Front Panel" on page 2-9. 3. Disconnect the A2DS1W1 cable from the A4 Inverter. 4. Disconnect the W8 ribbon cable from the A3 Power Switch by lifting the white tabs on the connector. 5. Using the T-10 driver, remove the four screws (12) from the A3 Power Switch. 6. Remove the A3 Power Switch. 7.
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Assembly Replacement A1 Keyboard Figure 2-4 A1 Keyboard Removal 2-13
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Assembly Replacement A2 Display A2 Display Tools Required • T-10 driver Removal Procedure Refer to Figure 2-5 for this procedure. 1. Disconnect the power cord. 2. Remove the front panel. Refer to "Front Panel" on page 2-9. 3. Disconnect the A2DS1W1 cable from the A4 Inverter. 4. Disconnect the W8 ribbon cable from the A3 Power Switch by lifting the white tabs on the connector. 5. Using the T-10 driver, remove the four screws (12) from the A3 Power Switch. 6. Remove the A3 Power Switch. 7.
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Assembly Replacement A2 Display Figure 2-5 A2 Display Removal 2-15
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Assembly Replacement A2DS1 Display Backlight A2DS1 Display Backlight Tools Required • T-10 driver • small phillips screw driver Removal Procedure Refer to Figure 2-6. 1. Disconnect the power cord. 2. Remove the front panel. Refer to "Front Panel" on page 2-9. 3. Disconnect the A2DS1W1 cable from the A4 Inverter. 4. Disconnect the W8 ribbon cable from the A3 Power Switch by lifting the white tabs on the connector. 5. Using the T-10 driver, remove the four screws (12) from the A3 Power Switch. 6.
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Assembly Replacement A2DS1 Display Backlight Figure 2-6 A2DS1 Display Backlight Removal 2-17
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Assembly Replacement A3 Power Switch A3 Power Switch Tools Required • T-10 driver Removal Procedure Refer to Figure 2-7 for this procedure. 1. Disconnect the power cord. 2. Remove the front panel. Refer to "Front Panel" on page 2-9. 3. Disconnect the W8 ribbon cable from the A3 Power Switch by lifting the white tabs on the connector. 4. Using the T-10 driver, remove the four screws (12) from the A3 Power Switch. 5. Remove the A3 Power Switch.
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Assembly Replacement A3 Power Switch Figure 2-7 A3 Power Switch Removal 2-19
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Assembly Replacement A4 Inverter A4 Inverter Tools Required • none Removal Procedure Refer to Figure 2-8 for this procedure. 1. Disconnect the power cord. 2. Remove the front panel. Refer to "Front Panel" on page 2-9. 3. Disconnect the A4W1 cable from the A31 Motherboard P12. 4. Disconnect the A2DSW1 cable from the A4 Inverter. CAUTION The A4 Inverter is fragile and can be damaged when pulled away from the velcro attachment. 5. Remove the A4 Inverter by pulling it away from the front panel.
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Assembly Replacement A4 Inverter Figure 2-8 A4 Inverter Removal 2-21
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Assembly Replacement A5 Sampler, A6 Frac-N, A7 Reference (Standard and Option UNR), and A8 Output A5 Sampler, A6 Frac-N, A7 Reference (Standard and Option UNR), and A8 Output Tools Required • none Removal Procedure Refer to Figure 2-9 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to "Outer Instrument Cover" on page 2-5 and "Inner Instrument Cover" on page 2-7. 3. Position the signal generator with the front panel facing you. 4.
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Assembly Replacement A5 Sampler, A6 Frac-N, A7 Reference (Standard and Option UNR), and A8 Output Figure 2-9 A5 Sampler, A6 Frac-N, A7 Reference, and A8 Output A5 A6 A7 A8 2-23
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Assembly Replacement A9 YIG Driver A9 YIG Driver Tools Required • needle-nose pliers Removal Procedure Refer to Figure 2-10 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to "Outer Instrument Cover" on page 2-5 and "Inner Instrument Cover" on page 2-7. 3. Position the signal generator with the front panel facing you. 4. Disconnect the W12 ribbon cable from A9J5. 5.
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Assembly Replacement A9 YIG Driver Figure 2-10 W10/A9J3 A9 YIG Driver W11/A9J4 W54/A9J9 W12/A9J5 A9 2-25
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Assembly Replacement A10 ALC A10 ALC Tools Required • needle-nose pliers Removal Procedure Refer to Figure 2-11 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to "Outer Instrument Cover" on page 2-5 and "Inner Instrument Cover" on page 2-7. 3. Position the signal generator with the front panel facing you. 4.
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Assembly Replacement A10 ALC Figure 2-11 A10 A10 ALC W13/A10J201 W55/A10J303 W4/A10J4 W14/A10J5 Option 540 - W15/A10J3 Option 520 - W82/A10J3 2-27
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Assembly Replacement A11 Pulse/Analog Modulation Generator A11 Pulse/Analog Modulation Generator Tools Required • needle-nose pliers Removal Procedure Refer to Figure 2-12 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to "Outer Instrument Cover" on page 2-5 and "Inner Instrument Cover" on page 2-7. 3. Position the signal generator with the front panel facing you. 4.
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Assembly Replacement A11 Pulse/Analog Modulation Generator Figure 2-12 A11 Pulse/Analog Modulation Generator W3/A11J403 W7/A11J202 W16/A11J204 W5/A11J201 W17/A11J205 W6/A11J203 W2/A11J402 A11 W1/A11J401 2-29
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Assembly Replacement A12 Pulse Modulator Board (Option 1E6) A12 Pulse Modulator Board (Option 1E6) Tools Required • T-10 driver • 5/16” open ended wrench Removal Procedure Refer to Figure 2-13 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to "Outer Instrument Cover" on page 2-5 and "Inner Instrument Cover" on page 2-7. 3. Position the signal generator so that the A31 Motherboard is facing you and the RF deck is on top. 4.
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Assembly Replacement A12 Pulse Modulator Board (Option 1E6) Figure 2-13 A12 Pulse Modulator Board (Option 1E6) W76 W16 A12 W69 W75 1 2-31
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Assembly Replacement A13 I/Q MUX (E8267C Models Only) A13 I/Q MUX (E8267C Models Only) Tools Required • T-10 driver • 5/16” open ended wrench • needle-nose pliers Removal Procedure Refer to Figure 2-14 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to "Outer Instrument Cover" on page 2-5 and "Inner Instrument Cover" on page 2-7. 3. Position the signal generator with the A31 Motherboard facing you and the RF deck on top. 4.
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Assembly Replacement A13 I/Q MUX (E8267C Models Only) Figure 2-14 A13 I/Q MUX 1 A13 W63/A13J6 W62/A13J7 W79/A13J4 W80/A13J3 1 W78 1 W77 W70 2-33
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Assembly Replacement A14 Baseband Generator (E8267C Models Only) A14 Baseband Generator (E8267C Models Only) Tools Required • T-10 driver • needle-nose pliers Removal Procedure Refer to Figure 2-15 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to "Outer Instrument Cover" on page 2-5 and "Inner Instrument Cover" on page 2-7. 3. Position the signal generator with the front panel facing you. 4.
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Assembly Replacement A14 Baseband Generator (E8267C Models Only) Figure 2-15 W64/A14J13 A14 Baseband Generator A14 W90/A14J21 W65/A14J800 2-35
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Assembly Replacement A17 Baseband Generator Interface (E8267C Models Only) A17 Baseband Generator Interface (E8267C Models Only) Tools Required • 5.0 mm hex-nut driver • 9/16” hex-nut driver • needle-nose pliers Removal Procedure Refer to Figure 2-16 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to "Outer Instrument Cover" on page 2-5 and "Inner Instrument Cover" on page 2-7. 3. Remove the rear panel.
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Assembly Replacement A17 Baseband Generator Interface (E8267C Models Only) Figure 2-16 A17 Rear Panel Interface Board W90/A17P1 A17 W64/A17P2 W68/A17P4 2 1 2-37
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Assembly Replacement A18 CPU A18 CPU Tools Required • T-10 driver Removal Procedure Refer to Figure 2-17 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to "Outer Instrument Cover" on page 2-5 and "Inner Instrument Cover" on page 2-7. 3. Position the signal generator with the front panel facing you. 4. Using the T-10 driver, remove the four screws from the Baseband Generator cover (E8267C Only). 5.
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Assembly Replacement A18 CPU Figure 2-17 A18 CPU W66/A18P2 W64/A14J13 W19/A18J2 W18/A18J1 W90/A14J21 A18 2-39
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Assembly Replacement A18BT1 A18BT1 WARNING This battery contains lithium. Do not incinerate or puncture this battery. Do not install this battery backwards. To dispose of the battery in a safe manner, refer to Chapter , "Lithium Battery Disposal," on page 5-3. Tools Required • flat head screw driver Removal Procedure Refer to Figure 2-17 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator.
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Assembly Replacement A18BT1 Figure 2-18 A18BT1 W18/A18J1 W66/A18P2 W64/A14J13 W19/A18J2 W90/A14J21 A18BT1 2-41
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Assembly Replacement A19 Power Supply A19 Power Supply Tools Required • T-10 driver • needle-nose pliers Removal Procedure Refer to Figure 2-19 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to "Outer Instrument Cover" on page 2-5 and "Inner Instrument Cover" on page 2-7. 3. Position the signal generator with the A31 Motherboard facing you. 4. Disconnect the W20 ribbon cable from the A20 SMI. 5.
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Assembly Replacement A19 Power Supply Figure 2-19 A19 Power Supply Removal A22W2 A22W1 2 1 4 W20 W64/A14J13 W66/A18J2 W18/A18J1 A19 3 2-43
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Assembly Replacement Rear Panel (Standard) Rear Panel (Standard) Tools Required • T-10 driver • needle-nose pliers Removal Procedure Refer to Figure 2-21 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to "Outer Instrument Cover" on page 2-5 and "Inner Instrument Cover" on page 2-7. 3. Using the T-10 driver, remove the four screws from the Baseband Generator cover (E8267C only). 4.
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Assembly Replacement Rear Panel (Standard) 9. Disconnect the following ribbon cables: • W64 from A17P2 (E8267C only) • W90 from A17P1 (E8267C only) • W20 from A20 SMI J1 • W18 from A21 Rear-Panel Interface J3 • W23 from A21 Rear-Panel Interface J2 10. If the signal generator has option UNR, disconnect the W48 flexible cable from A32 10 MHz Crystal Oscillator (Option UNR). 11. Using the T-10 driver, remove the two screws (1) that secure the Rear Panel to the left and right struts. 12.
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Assembly Replacement Rear Panel (Standard) Figure 2-20 Rear Panel Removal A22W2 A22W1 1 W20 W64/A14J13 2 W18/A18J1 3 2 2-46
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Assembly Replacement Rear Panel (Option 1EM) Rear Panel (Option 1EM) Tools Required • T-10 driver • needle-nose pliers Removal Procedure Refer to Figure 2-21 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to "Outer Instrument Cover" on page 2-5 and "Inner Instrument Cover" on page 2-7. 3. Using the T-10 driver, remove the four screws from the Baseband Generator cover (E8267C only). 4.
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Assembly Replacement Rear Panel (Option 1EM) • W56 (-Q OUT) from A35 3-20 GHz I/Q Modulator J14 (E8267C only) • W57 (-I OUT) from A35 3-20 GHz I/Q Modulator J13 (E8267C only) • W58 (Q OUT) from A35 3-20 GHz I/Q Modulator J12 (E8267C only) • W59 (I OUT) from A35 3-20 GHz I/Q Modulator J11 (E8267C only) • W50 (Q IN) from A35 3-20 GHz I/Q Modulator J8 (E8267C only) • W49 (I IN) from A35 3-20 GHz I/Q Modulator J7 (E8267C only) • W65 (BASEBAND GEN REF IN) from A14 Baseband Generator Board J800 (E8267C only) 9.
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Assembly Replacement Rear Panel (Option 1EM) Figure 2-21 Rear Panel Removal (Option 1EM) A22W2 A22W1 1 W20 W64/A14J13 2 W18/A18J1 3 2 2-49
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Assembly Replacement A20 SMI (Source Module Interface) A20 SMI (Source Module Interface) Tools Required • 5.0 mm hex-nut driver • needle-nose pliers Removal Procedure Refer to Figure 2-22 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to "Outer Instrument Cover" on page 2-5 and "Inner Instrument Cover" on page 2-7. 3. Using the needle-nose pliers, disconnect the W55 flexible cable from the A10 ALC J303. 4.
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Assembly Replacement A20 SMI (Source Module Interface) Figure 2-22 A20 SMI 2-51
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Assembly Replacement A21 Rear-Panel Interface A21 Rear-Panel Interface Tools Required • T-10 driver • 9/16” hex-nut driver • 5.0 mm hex-nut driver • 7.0 mm hex-nut driver • needle-nose pliers Removal Procedure Refer to Figure 2-23 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to "Outer Instrument Cover" on page 2-5 and "Inner Instrument Cover" on page 2-7. 3. Remove the rear panel.
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Assembly Replacement A21 Rear-Panel Interface Figure 2-23 A21 Rear-Panel Interface 2-53
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Assembly Replacement A22 Line Module A22 Line Module Tools Required • T-10 driver • 5.0 mm wrench • needle-nose pliers Removal Procedure Refer to Figure 2-24 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to "Outer Instrument Cover" on page 2-5 and "Inner Instrument Cover" on page 2-7. 3. Position the signal generator with the rear panel facing you. 4.
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Assembly Replacement A22 Line Module Figure 2-24 A22 Line Module Removal 2-55
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Assembly Replacement AT1 115 dB Attenuator AT1 115 dB Attenuator Tools Required • T-10 driver • 5/16” open ended wrench Removal Procedure Refer to Figure 2-25 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to "Outer Instrument Cover" on page 2-5 and "Inner Instrument Cover" on page 2-7. 3. Position the signal generator with the A31 Motherboard facing you so that the RF deck is on top. 4. Disconnect the AT1W1 ribbon cable from A26J13. 5.
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Assembly Replacement AT1 115 dB Attenuator Figure 2-25 AT1 115 dB Attenuator (Option 1E1) 1 AT1W1/A26J13 AT1 W25 W24 2-57
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Assembly Replacement AT1 115 dB Attenuator (Option 1EM) AT1 115 dB Attenuator (Option 1EM) Tools Required • T-10 driver • 5/16” open ended wrench Removal Procedure Refer to Figure 2-25 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to "Outer Instrument Cover" on page 2-5 and "Inner Instrument Cover" on page 2-7. 3. Position the signal generator with the A31 Motherboard facing you so that the RF deck is on top. 4.
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Assembly Replacement AT1 115 dB Attenuator (Option 1EM) Figure 2-26 AT1 115 dB Attenuator (Option 1E1) AT1 W73 W72 AT1W1 2-59
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Assembly Replacement A23 Lowband Coupler/Detector A23 Lowband Coupler/Detector Tools Required • T-10 driver • 5/16” open ended wrench • wire cutters Removal Procedure Refer to Figure 2-27 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to "Outer Instrument Cover" on page 2-5 and "Inner Instrument Cover" on page 2-7. 3. Position the signal generator so that the A31 Motherboard is facing you and the RF deck is on top. 4.
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Assembly Replacement A23 Lowband Coupler/Detector Figure 2-27 A23 Lowband Coupler/Detector W27 1 A23 E8247C/57C - W37 E8267C - W75 2-61
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Assembly Replacement A24 20 GHz Highband Coupler (Option 520 Only) A24 20 GHz Highband Coupler (Option 520 Only) Tools Required • T-10 driver • 5/16” open ended wrench Removal Procedure Refer to Figure 2-28 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to "Outer Instrument Cover" on page 2-5 and "Inner Instrument Cover" on page 2-7. 3. Position the signal generator with the A31 Motherboard facing away from you and the RF deck on top. 4.
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Assembly Replacement A24 20 GHz Highband Coupler (Option 520 Only) Figure 2-28 A24 20 GHz Highband Coupler (Standard) A74 A24 A25B A24 A33 A25 Figure 2-29 A24 20 GHz Highband Coupler (Option 1EM) W72 A24 A25B A33 W71 A25 2-63
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Assembly Replacement A24 40 GHz Highband Coupler (Option 540 Only) A24 40 GHz Highband Coupler (Option 540 Only) Tools Required • T-10 driver • 5/16” open ended wrench Removal Procedure Refer to Figure 2-28 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to "Outer Instrument Cover" on page 2-5 and "Inner Instrument Cover" on page 2-7. 3. Position the signal generator with the A31 Motherboard facing away from you and the RF deck on top. 4.
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Assembly Replacement A24 40 GHz Highband Coupler (Option 540 Only) Figure 2-30 A24 40 GHz Highband Coupler (Standard) W30 A25 W24 A24 A25BW1 Figure 2-31 A24 20 GHz Highband Coupler (Option 1EM) A25BW1 A24 W72 A25B A33 W71 A25 2-65
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Assembly Replacement A25 20 GHz Highband Detector A25 20 GHz Highband Detector Tools Required • 5/16” open ended wrench • needle-nose pliers Removal Procedure Refer to Figure 2-32 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to "Outer Instrument Cover" on page 2-5 and "Inner Instrument Cover" on page 2-7. 3. Position the signal generator with the A31 Motherboard facing away from you and the RF deck on top. 4.
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Assembly Replacement A25 20 GHz Highband Detector Figure 2-32 A25 20 GHz Highband Detector A33 A25 Figure 2-33 A25 20 GHz Highband Coupler (Option 1EM) A25 A33 2-67
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Assembly Replacement A25 40 GHz Highband Detector (Option 540 Only) A25 40 GHz Highband Detector (Option 540 Only) Tools Required • T-10 driver • 5/16” open ended wrench Removal Procedure Refer to Figure 2-34 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to "Outer Instrument Cover" on page 2-5 and "Inner Instrument Cover" on page 2-7. 3. Position the signal generator with the A31 Motherboard facing away from you and the RF deck on top. 4.
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Assembly Replacement A25 40 GHz Highband Detector (Option 540 Only) Figure 2-34 A25 40 GHz Highband Detector A25 A24 2-69
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Assembly Replacement A25B Highband Detector Bias Board A25B Highband Detector Bias Board Tools Required • T-10 driver Removal Procedure Refer to Figure 2-35 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to "Outer Instrument Cover" on page 2-5 and "Inner Instrument Cover" on page 2-7. 3. Position the signal generator with the A31 Motherboard facing away from you and the RF deck on top. 4.
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Assembly Replacement A25B Highband Detector Bias Board Figure 2-35 A25B Highband Detector Bias Board A25BW1 A25B 2-71
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Assembly Replacement A26 MID (Microcircuit Interface Deck) A26 MID (Microcircuit Interface Deck) Tools Required • T-10 driver Removal Procedure Refer to Figure 2-36 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to "Outer Instrument Cover" on page 2-5 and "Inner Instrument Cover" on page 2-7. 3. Position the signal generator with the A31 Motherboard facing you and the RF deck on top. 4.
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Assembly Replacement A26 MID (Microcircuit Interface Deck) Figure 2-36 A26 MID W36/A26J13 A26 A25BW1 W28/A26J15 W35/A26J10 W69/A26J14 W20/A26J20 W70/A26J34 W33/A26J32 W34/A26J31 W19/A26J30 1 2-73
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Assembly Replacement A27 40 GHz Doubler (Option 540 Models Only) A27 40 GHz Doubler (Option 540 Models Only) Tools Required • T-10 driver • 5/16” open ended wrench Removal Procedure Refer to Figure 2-37 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to "Outer Instrument Cover" on page 2-5 and "Inner Instrument Cover" on page 2-7. 3. Position the signal generator with the A31 Motherboard facing away from you and the RF deck on top. 4.
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Assembly Replacement A27 40 GHz Doubler (Option 540 Models Only) Figure 2-37 A27 40 GHz Doubler W32 A27 W31 Standard - W30 Option 1EM - W83 W29 2-75
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Assembly Replacement A28 YIG Oscillator A28 YIG Oscillator Tools Required • T-10 driver • 5/16” open ended wrench Removal Procedure Refer to Figure 2-38 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to "Outer Instrument Cover" on page 2-5 and "Inner Instrument Cover" on page 2-7. 3. Position the signal generator with the A31 Motherboard facing you and the RF deck on top. 4.
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Assembly Replacement A28 YIG Oscillator Figure 2-38 A28 YIG Oscillator W27 A28 W12 W38 2-77
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Assembly Replacement A29 20 GHz Doubler A29 20 GHz Doubler Tools Required • T-10 driver • 5/16” open ended wrench Removal Procedure Refer to Figure 2-39 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to "Outer Instrument Cover" on page 2-5 and "Inner Instrument Cover" on page 2-7. 3. Position the signal generator with the A31 Motherboard facing you and the RF deck on top. 4.
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Assembly Replacement A29 20 GHz Doubler Figure 2-39 A29 20 GHz Doubler W32 1 E8247C/57C - W41 E8267C - W77 A29 W40 1 W39 W38 2-79
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Assembly Replacement A30 Modulation Filter (Standard and Option 1EA) A30 Modulation Filter (Standard and Option 1EA) Tools Required • T-10 driver • 5/16” open ended wrench Removal Procedure Refer to Figure 2-40 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to "Outer Instrument Cover" on page 2-5 and "Inner Instrument Cover" on page 2-7. 3. Position the signal generator with the A31 Motherboard facing away from you and the RF deck on top. 4.
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Assembly Replacement A30 Modulation Filter (Standard and Option 1EA) Replacement Procedure • Reverse the order of the removal procedure. • Torque all T-10 screws to 9 in-lbs. • Torque all RF connectors to 8 in-lbs. • Perform the post-repair adjustments and performance tests that pertain to this removal procedure.
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Assembly Replacement A30 Modulation Filter (Standard and Option 1EA) Figure 2-40 A30 Modulator Filter W33 W17/A30J7 W13/A30J6 E8247C/57C - W41 E8267C - W78 1 W27/A30J3 W32/A30J4 Option 1EM - W71 Option 540 - W31 Standard - W74 1 2-82
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Assembly Replacement A31 Motherboard (E8247C/57C) A31 Motherboard (E8247C/57C) Tools Required • T-10 driver • 5/16” open ended wrench • needle-nose pliers Removal Procedure Refer to Figure 2-41 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to "Outer Instrument Cover" on page 2-5 and "Inner Instrument Cover" on page 2-7. 3. Position the signal generator with the A31 Motherboard facing you and the RF deck on top. 4. Remove the front panel.
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Assembly Replacement A31 Motherboard (E8247C/57C) Replacement Procedure • Reverse the order of the removal procedure. • Send command "DIAG:FILE:BACK", this copies data to the Motherboard. • Torque all T-10 screws to 9 in-lbs. • Torque all RF connectors to 8 in-lbs. • Perform the post-repair adjustments and performance tests that pertain to this removal procedure.
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Assembly Replacement A31 Motherboard (E8247C/57C) Figure 2-41 A31 Motherboard (E8247C/57C) W35 W37 W39 W40 W22/A31J1042 W23 1 W47/A31J1041 W11/A31J1021 W10/A31J1031 W21/A31J1043 W54/A31J1032 2-85
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Assembly Replacement A31 Motherboard (E8267C) A31 Motherboard (E8267C) Tools Required • T-10 driver • 5/16” open ended wrench • needle-nose pliers Removal Procedure Refer to Figure 2-41 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to "Outer Instrument Cover" on page 2-5 and "Inner Instrument Cover" on page 2-7. 3. Position the signal generator with the A31 Motherboard facing you and the RF deck on top. 4. Remove the front panel.
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Assembly Replacement A31 Motherboard (E8267C) 8. Using the needle-nose pliers, disconnect the W68 wire cable from A31J250 9. Disconnect the W23 ribbon cable from the A21 Rear Panel Interface while removing the A31 Motherboard from the chassis. 10. Disconnect the W35 ribbon cable (not shown in Figure 2-42) from the A26 MID J10. 11. Using the T-10 driver, remove the 15 screws (1) that hold the A31 Motherboard to the chassis. Replacement Procedure • Reverse the order of the removal procedure.
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Assembly Replacement A31 Motherboard (E8267C) Figure 2-42 A31 Motherboard (E8267C) W52/A31J501 W23 W67 1 W68/A31J250 W53/A31J502 W51/A31J500 W39 W40 W76 W61/A31J1053 W60/A31J1052 W21/A31J1043 W47/A31J1041 W22/A31J1042 2-88 W11/A31J1021 W54/A31J1032 W10/A31J1031
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Assembly Replacement A31 Motherboard (E8267C) This page intentionally left blank 2-89
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Assembly Replacement A32 10 MHz Crystal Oscillator (Option UNR) A32 10 MHz Crystal Oscillator (Option UNR) Tools Required • T-10 driver • needle-nose pliers Removal Procedure Refer to Figure 2-43 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to "Outer Instrument Cover" on page 2-5 and "Inner Instrument Cover" on page 2-7. 3. Position the signal generator with the Rear Panel facing you. 4.
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Assembly Replacement A32 10 MHz Crystal Oscillator (Option UNR) Figure 2-43 A32 Crystal Oscillator 2-91
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Assembly Replacement A33 6 dB PAD A33 6 dB PAD Tools Required • 5/16” open ended wrench • needle-nose pliers Removal Procedure Refer to Figure 2-44 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to "Outer Instrument Cover" on page 2-5 and "Inner Instrument Cover" on page 2-7. 3. Using the 5/16” open ended wrench, disconnect the A33 6 dB PAD from the A24 Highband Coupler. 4.
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Assembly Replacement A33 6 dB PAD Figure 2-44 A33 6 dB PAD A74 A24 A25B A24 A33 A25 2-93
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Assembly Replacement A34 Internal Hard Drive (E8267C Models Only) A34 Internal Hard Drive (E8267C Models Only) Tools Required • T-10 driver Removal Procedure Refer to Figure 2-45 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to "Outer Instrument Cover" on page 2-5 and "Inner Instrument Cover" on page 2-7. 3. Remove the rear panel. Refer to "Rear Panel (Standard)" on page 2-44 or "Rear Panel (Option 1EM)" on page 2-47. 4.
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Assembly Replacement A34 Internal Hard Drive (E8267C Models Only) Figure 2-45 A34 Internal Hard Drive (Option 005) W66/A18P2 1 A34 2-95
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Assembly Replacement A35 3-20 GHz I/Q Modulator (E8267C Models Only) A35 3-20 GHz I/Q Modulator (E8267C Models Only) Tools Required • needle-nose pliers Removal Procedure Refer to Figure 2-46 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to "Outer Instrument Cover" on page 2-5 and "Inner Instrument Cover" on page 2-7. 3. Position the signal generator with the front panel facing you. 4.
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Assembly Replacement A35 3-20 GHz I/Q Modulator (E8267C Models Only) Figure 2-46 A35 3-20 GHz I/Q Modulator W63/A36J5 W56/A35J14 W62/A35J6 W57/A35J13 W49/A35J7 W58/A35J12 W59/A35J11 W61/A35J9 W50/A35J8 W60/A35U702 2-97
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Assembly Replacement B1 Fan B1 Fan Tools Required • T-10 driver • 5/16” open ended wrench Removal Procedure Refer to Figure 2-47 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to "Outer Instrument Cover" on page 2-5 and "Inner Instrument Cover" on page 2-7. 3. Position the signal generator with the rear panel facing you. 4.
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Assembly Replacement B1 Fan Figure 2-47 B1 Fan 2 1 2-99
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Assembly Replacement B1 Fan 2-100
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3 Replaceable Parts 3-1
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Replaceable Parts Ordering Information Ordering Information To order a part, do the following: 1. Determine the part number. 2. Determine the quantity required. 3. Mail this information to the nearest Agilent Technologies office or, in the U.S., call the hot-line number listed in the following section.
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Replaceable Parts Save Money with Rebuilt-Exchange Assemblies Save Money with Rebuilt-Exchange Assemblies Under the rebuilt-exchange assembly program, certain factory-repaired and tested assemblies are available on a trade-in basis. These assemblies cost less than a new assembly, and meet all factory specifications required of a new assembly. The defective assembly must be returned for credit under the terms of the rebuilt-exchange assembly program.
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Replaceable Parts Shipping a Defective Assembly Back to Agilent Technologies Shipping a Defective Assembly Back to Agilent Technologies 1. When you receive the rebuilt assembly, be careful not to damage the box in which it was shipped. You will use that box to return the defective assembly. The box you receive should contain the following: • the rebuilt assembly • an exchange assembly failure report • a return address label 2. Complete the failure report. 3.
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Replaceable Parts Frequency, Hardware, and Personality Options Frequency, Hardware, and Personality Options This section lists the options available with the Agilent PSG Family signal generator. Frequency Options 520 250 kHz to 20 GHz frequency range 540 250 kHz to 40 GHz frequency range (E8247C/57C only) Hardware Options 1E1 Adds output step attenuator for extended range to −135 dBm 1E6 Adds fast pulse < 3.
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Replaceable Parts Assemblies and Hardware Options Assemblies and Hardware Options Assembly E8247C E8257C E8267C Part Number Page Number Part Number Page Number E8251-60058 3-9 E8251-60058 3-9 A2 Display 2090-0375 3-9 2090-0375 3-9 A2DS1 Display Backlight 1513-5204 3-9 1513-5204 3-9 E8251-60042 3-9 E8251-60042 3-9 A4 Inverter 0950-3757 3-9 0950-3757 3-9 A5 Sampler E8251-60043 3-10 E8251-60043 3-11 A6 Frac-N E8251-60079 3-10 E8251-60079 3-11 A7 Reference E8251-60073 3
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Replaceable Parts Assemblies and Hardware Options Assembly E8247C E8257C A21 Rear Panel Interface E8267C E8251-60203 3-16 and 3-12 E8251-60203 3-17 and 3-13 5064-5053 3-16 and 3-12 9135-5695 3-17 and 3-13 A23 Lowband Coupler/Detector E8251-60010 3-10, 3-16 and 3-14 E8251-60210 3-11, 3-17 and 3-15 A24 20 GHz Highband Coupler 0955-0148 3-10 and 3-14 0955-0148 3-11 and 3-15 A24 40 GHz Highband Coupler 0955-1136 3-10 and 3-14 N/A A25 20 GHz Highband Detector 08360-60147 3-10 and 3-14
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Replaceable Parts Assemblies and Hardware Options Assembly E8247C E8257C AT1 115 dB Mechanical Attenuator (Option 1E1) E8267C E8251-60070 3-10, 3-16 and 3-14 E8251-60070 3-11, 3-17 and 3-15 B1 Fan 3160-4121 3-10, 3-16 and 3-12 3160-4121 3-11, 3-17 and 3-13 RF Output Connector (2.4mm) (Option 540) 5063-1700 3-42 N/A RF Output Connector (3.
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Replaceable Parts Assemblies and Hardware Options Assemblies from the Inside Front Panel View Figure 3-2 Assemblies from the Inside Front Panel View (E8247C, E8257C and E8267C) 3-9
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Replaceable Parts Assemblies and Hardware Options Assemblies from a Top View Figure 3-3 Assemblies from a Top View (E8247C and E8257C) A32 (Option UNR) B1 A20 A19 A18 A26 A27 A25 A25B A24 A11 3-10 A10 A9 A8 A7 A6 A5 A23 AT1 (Option 1E1)
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Replaceable Parts Assemblies and Hardware Options Figure 3-4 Assemblies from a Top View (E8267C) A32 (Option UNR) B1 A20 A34 A17 A19 A26 A18 A14 A25 A35 A33 A25B A24 A23 A11 A10 A9 A8 A7 A6 A5 A12 AT1 (Option 1E1) 3-11
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Replaceable Parts Assemblies and Hardware Options Assemblies from the Inside Rear Panel View Figure 3-5 3-12 Assemblies from the Inside Rear Panel View (E8247C and E8257C)
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Replaceable Parts Assemblies and Hardware Options Figure 3-6 A32 A22 Assemblies from the Inside Rear Panel View (E8267C) A17 A20 A21 B1 A34 3-13
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Replaceable Parts Assemblies and Hardware Options Assemblies from a Microcircuit Deck View Figure 3-7 Assemblies from a Microcircuit Deck View (E8247C and E8257C) A27 A25 A25B A24 A23 A26 3-14 A30 A29 A28 AT1 (Option 1E1)
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Replaceable Parts Assemblies and Hardware Options Figure 3-8 Assemblies from a Microcircuit Deck View (E8267C) A33 A25 A26 A13 A30 A25B A29 A24 A28 A23 AT1 (Option 1E1) 3-15
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Replaceable Parts Assemblies and Hardware Options Assemblies from a Bottom View Figure 3-9 Assemblies from a Bottom View (E8247C and E8257C) B1 A22 A31 A21 A30 A29 A28 A23 3-16 AT1 (Option 1E1)
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Replaceable Parts Assemblies and Hardware Options Figure 3-10 Assemblies from a Bottom View (E8267C) B1 A31 A21 A22 A13 A30 A29 A28 A23 AT1 (Option 1E1) A12 3-17
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Replaceable Parts Assemblies and Hardware Options A18BT1 Lithium Battery Figure 3-11 A18BT1 Lithium Battery A18 3-18 A18BT1
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Replaceable Parts Cables Cables This section lists part numbers for the cables in your signal generator.
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Replaceable Parts Cables Table 3-1 Reference Designator Input Output Part Number W13 A10J201 A30J6 8121-0624 W14 A10J5 A23J104 8121-0627 W15 (Option 540) A10J3 A25 40 GHz Highband Detector 8121-0607 W16 A11J204 A12 Pulse Modulator Board 8121-0623 W17 A11J205 A30J7 8121-0626 W18 A18J1 A21J3 8121-0617 W19 A18J2 A26J30 8121-0619 W20 A20J1 A26J20 8121-0677 W21 A31J1043 rear panel (10MHz OUT) 8121-0622 W22 A31J1042 rear panel (10MHz IN) 8121-0622 W23 A21J2 A31P241
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Replaceable Parts Cables Table 3-1 Reference Designator Input Output Part Number W36 Ribbon Cable, AT1 115 dB Mechanical Attenuator A26J13 8121-0982 W37 Semi-Rigid Cable, A23 Lowband Coupler/Detector A31 Motherboard (Output) E8251-20225 W38 Semi-Rigid Cable, A28 YIG Oscillator out A29J1 E8251-20014 W39 A29J4 A31 Motherboard (Sampler) E8251-20015 W40 A29J3 A31 Motherboard (Frac-N) E8251-20224 W41 A29J2 A30J1 E8251-20017 W42 Semi-Rigid Cable, A31 Motherboard (Sampler) A31 Mother
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Replaceable Parts Cables Table 3-1 Reference Designator Input Output Part Number W57 A35J13 rear panel (-I OUT) 8121-0901 A35J12 rear panel (Q OUT) 8121-0901 A35J11 rear panel (I OUT) 8121-0901 A35J10 A31J1052 8121-0626 A35J9 A31J1053 8121-0626 A35J6 A13J7 8121-0624 A35J5 A13J6 8121-0624 A14J13 A17P2 8121-0920 A14J800 rear panel (BASEBAND GEN REF IN) 8121-0901 A18P2 A34 Internal Hard Drive 8121-0685 Semi-Rigid Cable, A31 Motherboard rear panel (.25-3.
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Replaceable Parts Cables Table 3-1 Reference Designator Input Output Part Number W75 Semi-Rigid Cable, A23 Lowband Coupler/Detector A12 Pulse Modulator Board E8251-20033 W76 Semi-Rigid Cable, A12 Pulse Modulator Board A31 Motherboard (Output) E8251-20032 W77 A29J2 A13 I/Q MUX E8251-20018 A30J1 A13 I/Q MUX E8251-20019 A13J107 rear panel (WIDEBAND Q INPUT) 8121-0628 A13J106 rear panel (WIDEBAND I INPUT) 8121-0628 A10J3 A25 20 GHz Highband Detector 8121-0900 A10J3 A25 20 GHz Highb
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Replaceable Parts Hardware Hardware This section lists part numbers for hardware and other instrument parts in your signal generator.
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Replaceable Parts Hardware Front Panel View Table 3-2 Front Panel View Item No.
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Replaceable Parts Hardware Figure 3-12 3-26 Front Panel View
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Replaceable Parts Hardware Disassembled Front Panel View Table 3-3 Disassembled Front Panel View Item No. Description Qty Part Number 1 Front Panel Frame 1 E8251-20102 2 Gasket RFI Round Mesh .125 inch 1 8160-0660 3 Gasket RFI Round Mesh .
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Replaceable Parts Hardware Figure 3-13 3-28 Disassembled Front Panel View
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Replaceable Parts Hardware Disassembled Rear Panel View Table 3-4 Disassembled Rear Panel View Item No. 1 2 Description Qty Part Number Rear Panel (E8247C and E8257C) Option UNM 1 E8251-00020 Rear Panel (E8247C and E8257C) Option 1EM 1 E8251-00013 Rear Panel (E8267C) Option UNM 1 E8251-00021 Rear Panel (E8267C) Option 1EM 1 E8251-00022 Screw-Machine M3.0 8 CW-PN-TX (mounting screws for rear-panel and rear struts) E8247C/57C E8267C 0515-0372 10 14 3 Screw-Machine M3.
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Replaceable Parts Hardware Table 3-4 Disassembled Rear Panel View Item No.
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Replaceable Parts Hardware Figure 3-15 E8267C Disassembled Rear Panel View 3-31
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Replaceable Parts Hardware Disassembled A32 10 MHz Crystal Oscillator (Option UNR) Table 3-5 Disassembled A32 10 MHz Crystal Oscillator (Option UNR) Item No. 3-32 Description Qty Part Number 1 C-Bracket 1 E8251-00040 2 Shock Mount 3 1520-0205 3 Flathead Washer 3 3050-0105 4 Screw-Machine 4.0 x 40 .250 3 2200-0103 5 L-Bracket 1 E8251-00041 6 Screw-Machine M3.0 x 8 CW-PN-TX 2 0515-0372 7 Nut-Hex M3.0 (line module ground) 1 0535-0031 8 Screw-Machine M3.
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Replaceable Parts Hardware Figure 3-16 Disassembled A32 10 MHz Crystal Oscillator (Option UNR) 3-33
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Replaceable Parts Hardware Disassembled AT1 115 dB Attenuator View (Option 1E1) Table 3-6 Disassembled AT1 115 dB Attenuator View (Option 1E1) Item No. Description Qty Part Number 1 Bracket 1 E8251-00038 2 Screw-Machine M3.
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Replaceable Parts Hardware Disassembled A24 20 GHz Highband Coupler and A25B Highband Detector Bias Board Table 3-7 Disassembled A24 20 GHz Highband Coupler and A25B Highband Detector Bias Board Item No. Description Qty Part Number 1 Coupler Bracket (Option 520) 1 E8251-00212 2 Washer Lock M2.0 2 2190-0654 3 Screw-Machine SM 256 .250 PN-PN 2 0520-0128 4 Screw-Machine M3.0 x 8 FL-TX 2 0515-1035 5 Screw-Machine M3.
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Replaceable Parts Hardware Disassembled A24 40GHz Highband Coupler and A25B Highband Detector Bias Board Table 3-8 Disassembled A24 Highband Coupler and A25 Highband Detector Item No. Qty Part Number 1 Coupler Bracket (Option 540) 1 E8251-00039 2 Washer Lock M2.5 2 2190-0583 3 Screw-Machine M4.0 x .312 PN-PN 2 2200-0141 4 Screw-Machine M3.0 x 8 FL-TX 2 0515-1035 5 Screw-Machine M3.
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Replaceable Parts Hardware Microcircuit Interface Deck Top View Table 3-9 Item No. 1 Figure 3-20 Microcircuit Interface Deck Top View Description Screw-Machine M3.
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Replaceable Parts Hardware Figure 3-21 E8267C Microcircuit Interface Deck Top View 1 3-38
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Replaceable Parts Hardware Main Chassis and MID Bottom View Table 3-10 Main Chassis and MID Bottom View Item No. Description Qty Part Number E8251-00008 1 Rib Bracket 1 2 Cable Retainer Clip E8247C/57C E8267C 3 4 3 Screw-Machine M30. x 8 CW-PN-TX (A31 Motherboard to main chassis) 13 0515-0372 4 Screw-Machine M30. x 8 CW-PN-TX (A28 YIG Oscillator to MID) 2 0515-0372 5 Screw-Machine M30.
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Replaceable Parts Hardware Figure 3-22 3-40 Main Chassis and MID Bottom View (E8247C/57C)
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Replaceable Parts Hardware Figure 3-23 Main Chassis and MID Bottom View (E8267C) (3 places) 7 (13 places) 3 1 (3 places) 5 4 (2 places) 2 6 (2 places) (4 places) 3-41
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Replaceable Parts Hardware 2.4 mm RF Output Connector (Option 540 Only) Table 3-11 2.4 mm RF Output Connector (Option 540 Only) Item No. Description Part Number 1 Adapter-Male 2.4 mm 1 5063-1700 2 Adapter Bracket 1 E8251-00216 3 Screw-Machine M4.0 x 10 FL-TX (front frame to adapter bracket) 1 0515-1269 4 Washer lock .377ID 1 2190-0016 5 Nut-Hex 1 E8251-20067 W25 Semi-Rigid Cable (refer to Table 3-1 on page 3-19.) Figure 3-24 3-42 Qty 2.
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Replaceable Parts Hardware APC 3.5 RF Output Connector (Option 520 Only) Table 3-12 APC 3.5 RF Output Connector (Option 520 Only) Item No. Description Qty Part Number 1 Adapter-Male APC 3.5 1 08673-60040 2 Spacer APC 3.5 1 E8251-20068 3 Adapter Bracket 1 E8251-00215 4 Screw-Machine M4.0 x 10 FL-TX 1 0515-1269 5 Washer lock .377ID 1 2190-0016 6 Nut-Hex 1 2950-0001 W25 Semi-Rigid Cable (refer to Table 3-1 on page 3-19.) Figure 3-25 APC 3.
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Replaceable Parts Hardware Type-N RF Output Connector (Option 1ED Models Only) Table 3-13 Type-N RF Output Connector (Option 1ED Models Only) Item No. Description Qty 1 Adapter-Type-N (f) 1 08559-60002 2 Spacer 1 E8251-20067 3 Adapter Bracket 1 E8251-00216 4 Screw-Machine M4.0 x 10 FL-TX 1 0515-1035 5 Washer lock 1 2190-0102 6 Nut-Hex 1 2950-0132 W25 Semi-Rigid Cable (refer to Table 3-1 on page 3-19.
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Replaceable Parts Hardware Main Chassis with Inside Cover and Right-Side Support Wall Table 3-14 Main Chassis with Inside Cover and Right-Side Support Wall Item No. Description Qty Part Number 1 Main Chassis Inside Top Cover 1 E8251-00011 2 Screw-Machine M3.0 x 08 FL-TX (inside top cover to main chassis and rear panel) 9 0515-0430 3 Screw-Machine M3.0 x 08 CW-PN-TX (rear panel to right-side support wall) 3 0515-0372 4 Screw-Machine M3.
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Replaceable Parts Hardware Outer and Inner Instrument Covers and Associated Parts Table 3-15 Outer and Inner Instrument Covers and Associated Parts Item No.
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Replaceable Parts Hardware Figure 3-28 Outer and Inner Instrument Covers and Associated Parts 3-47
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Replaceable Parts Miscellaneous Miscellaneous This section lists part numbers for miscellaneous items that can be used with your signal generator.
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Replaceable Parts Miscellaneous Electrostatic Discharge (ESD) Protective Supplies Table 3-18 Electrostatic Discharge (ESD) Protective Supplies Description Part Number ESD connector end cap front-panel RF output 1401-0247 ESD connector end cap rear panel SMI 1252-4690 ESD connector end cap-GPIB 1252-5007 ESD connector end cap coherent carrier cut 1252-4696 2 X 4 Ft. Antistatic Table Mat with 15 FT. Ground Wire 9300-0797 5 Ft.
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Replaceable Parts Abbreviations Used in Part Descriptions Abbreviations Used in Part Descriptions This section defines the reference designators, abbreviations, and option numbers that are used in the part descriptions throughout this chapter.
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4 Post-Repair Procedures • “Adjustments: Assemblies A1—A12” on page 4-2 • “Adjustments: Assemblies A13—A26” on page 4-3 • “Adjustments: Assemblies A27—A35, AT1, B1, and RF Output Connector” on page 4-4 • “Performance Tests: Assemblies A1—A18” on page 4-5 • “Performance Tests: Assemblies A19—A32” on page 4-6 • “Performance Tests: Assemblies A34, A35, AT1, B1, and RF Output Connector” on page 4-7 4-1
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Post-Repair Procedures Post-Repair Procedures Matrix Post-Repair Procedures Matrix Adjustments: Assemblies A1—A12 ADC Calibration ✓ ✓ ✓ YIG-Driver Pre-Tune Calibration VCO Bias Frac-N Calibration ✓ ✓ ✓ ✓ ✓ Timebase Calibration (Non UNR/UNJ Options) FM Path Offset Calibration FM In-band Offset Calibration ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ FM Inverting Amplifier Offset Calibration FM 1/2 Path Ratio Gain Calibration Mod Source Relative Gain Calibration FM/PM Out-of-Band Calibrat
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Post-Repair Procedures Post-Repair Procedures Matrix Adjustments: Assemblies A13—A26 ✓ ADC Calibration A26 MID A25B Detector Bias Board A25 40 GHz Detector A25 20 GHz Detector A24 40 GHz Coupler A24 20 GHz Coupler A23 Lowband Coupler/Detector A22 Line Module A21 Rear Panel A19 Power Supply A13 IQ Multiplexer The following adjustments are listed in the order that they should be performed for proper calibration.
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Post-Repair Procedures Post-Repair Procedures Matrix Adjustments: Assemblies A27—A35, AT1, B1, and RF Output Connector ADC Calibration YIG-Driver Pre-Tune Calibration VCO Bias Frac-N Calibration Internal Source Calibration AM Audio Path Offset Calibration KV vs.
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Post-Repair Procedures Post-Repair Procedures Matrix Performance Tests: Assemblies A1—A18 Self Tests ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ Power Level Accuracy ✓ ✓ ✓ Internal Pulse Modulation Level Accuracy ✓ ✓ ✓ ✓ Internal Pulse Modulation Rise/Fall Time ✓ ✓ ✓ ✓ Maximum Leveled Output Power ✓ DC FM Carrier Offset ✓ Internal FM Frequency Response ✓ ✓ ✓ External Phase Modulation Frequency Response ✓ ✓ ✓ Internal FM Distortion ✓ ✓ Internal Phase Modulation Distortion ✓ ✓ External F
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Post-Repair Procedures Post-Repair Procedures Matrix Performance Tests: Assemblies A19—A32 Self Tests A32 10 MHz Crystal Oscillator A31 Motherboard A30 Mod Filter with Standard Power A30 Mod Filter with High Power (Opt 1EA) A29 20 GHz Doubler A28 YIG Oscillator A27 40 GHz Doubler A26 MID [Microcircuit Interface Deck] A25B Detector Bias Board A25 40 GHz Detector A25 20 GHz Detector A24 20 GHz Coupler A23 Lowband Coupler/Detector A22 Line Module A19 Power Supply The following performance tes
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Post-Repair Procedures Post-Repair Procedures Matrix Performance Tests: Assemblies A34, A35, AT1, B1, and RF Output Connector RF Output Connector B1 Fan AT1 115 dB Attenuator The following performance tests are listed in the order that they should be performed to minimize changes in test equipment configurations.
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Post-Repair Procedures Post-Repair Procedures Matrix 4-8
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5 Safety and Regulatory This chapter provides information on the following: • “General Safety Considerations” on page 5-2 • “Lithium Battery Disposal” on page 5-3 • “Assistance” on page 5-3 • “Certification” on page 5-3 The following safety notes are used throughout this manual. Familiarize yourself with each of the notes and its meaning before operating this instrument. CAUTION Caution denotes a hazard.
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Safety and Regulatory General Safety Considerations General Safety Considerations The following safety notes apply specifically to signal generators. These notes also appear in other chapters of this service guide as required. WARNING These servicing instructions are for use by qualified personal only. To avoid electrical shock, do not perform any servicing unless you are qualified to do so. WARNING The opening of covers or removal of parts is likely to expose dangerous voltages.
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Safety and Regulatory Lithium Battery Disposal Lithium Battery Disposal When the battery on the A14 CPU is exhausted and/or ready for disposal, dispose of it according to your country’s requirements. You can return the battery to your nearest Agilent Technologies Sales and Service office for disposal, if required. Figure 5-1 Assistance Product maintenance agreements and other customer assistance agreements are available for Agilent Technologies products.
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Safety and Regulatory Lithium Battery Disposal 5-4
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Index Numerics 10 MHz crystal oscillator (Option UNR) replacement, 2-90 115 dB attenuator (Option 1E1) replacement, 2-56, 2-58 20 GHz doubler replacement, 2-78 highband coupler replacement, 2-62 highband detector replacement, 2-66 3-20 GHz I/Q modulator replacement, 2-96 40 GHz doubler replacement, 2-74 highband coupler replacement, 2-64 highband detector replacement, 2-68 6dB PAD replacement, 2-92 A accessories test cable, 3-48 ADC adjustment, troubleshooting, 1-73 adjustments required after repair, 4-1 t
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Index 40 GHz highband replacement, 2-68 highband bias board replacement, 2-70 lowband replacement, 2-60 digital modulation, description, 1-108 display replacement, 2-14 display backlight replacement, 2-16 driver YIG, 2-24 E electrostatic discharge supplies, 3-49 lists assemblies and hardware options, 3-6 cables, 3-19 hardware, 3-24 replaceable assemblies, 2-3 lithium battery disposal, 5-3 replacement, 2-40 lowband coupler/detector replacement, 2-60 M microcircuit interface deck (MID) replacement, 2-72 mo
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Index reference replacement, 2-22 reference/synthesis loop block diagram, 1-95 description, 1-95 repair adjustments required, 4-1 performance tests required, 4-1 troubleshooting, 1-1 replaceable parts assemblies, 2-3 hardware, 3-24 ordering information, 3-2 RF path block diagram, 1-110 description, 1-103 troubleshooting, 1-76 replacement, 2-24 YIG oscillator replacement, 2-76 S safety, general considerations, 5-2 sales and service offices, 1-118 sampler replacement, 2-22 self-tests overview, 1-115 running
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Index I-4