Service Guide Publication Number 54845-97008 February 2001 This manual applies directly to Infiniium oscilloscopes with serial number prefixes: • XX3625 through XX4106 and above for information about serial numbers, see “Instruments Covered by this Guide” in section 1. The part number for this Service Guide For Safety information, Warranties, and Regulatory information, see the pages at the back of this book. Copyright Agilent Technologies 1997-2001 All Rights Reserved.
The Agilent Technologies Infiniium Oscilloscope Model 54835A/45A/46A at a Glance Ease of use with high performance The Agilent Technologies Infiniium oscilloscopes combine unprecedented ease-of-use with highperformance digitizing oscilloscope functionality to simplify your design and analysis measurement tasks.
Display and Graphical Interface Horizontal controls Acquisition and general controls Floppy Disk Drive Trigger Setup Power Marker and Quick Measurements Vertical Inputs Vertical Controls Auxiliary Trigger Input AutoProbe Interface iii
In This Book This book provides the service documentation for the Agilent Technologies 54835A/45A/46A oscilloscope. It is divided into eight chapters. Chapter 1 provides general information and specifications. Chapter 2 shows you how to prepare the oscilloscope for use. Chapter 3 gives performance tests. Chapter 4 covers calibration and adjustment procedures, how to do them, and how often they need to be done. Chapter 5 provides troubleshooting information.
Contents Contents 1 1 General Information 1-2 Instruments covered by this service guide 1-2 Accessories supplied 1-3 Options available 1-4 Accessories available 1-5 Specifications & characteristics 1-7 Agilent Technologies 54835A/45A/46A general characteristics 1-14 Recommended test equipment 1-16 2 Preparing for Use 2-2 Setting Up the Oscilloscope 2-3 To inspect the instrument 2-3 To connect power 2-4 To connect the mouse or other pointing device 2-5 To attach the optional trackball 2-5 To connect the
Contents Mainframe Cal Factor Memory Error 4-2 Operating Hints 4-3 Loading Default Oscilloscope Settings 4-3 Loading New Software 4-3 Calibration Procedures 4-3 To check the power supply 4-4 To check the 715 Hz auxiliary output (probe compensation squarewave) 4-6 To check the flat panel display (FPD) 4-7 To run the self calibration 4-10 5 Troubleshooting 5-2 Safety 5-2 Tools Required 5-2 ESD Precautions 5-2 Keystroke Conventions 5-2 Default Setup 5-3 To install the fan safety shield 5-3 To troubleshoot t
Contents To remove and replace the floppy disk drive 6-21 To remove and replace the motherboard 6-21 To remove and replace the power supply 6-24 To remove and replace the fan 6-25 To remove and replace the CPU 6-26 To remove and replace RAM SIMMs or SDRAM DIMMs 6-27 To remove and replace an attenuator 6-28 To reset the attenuator contact counter 6-30 To remove and replace an acquisition hybrid 6-32 7 Replaceable Parts 7-2 Ordering Replaceable Parts 7-2 Power Cables and Plug Configurations 7-3 Exploded Vi
1 Instruments covered by this service guide 1-2 Accessories supplied 1-3 Options available 1-4 Accessories available 1-5 Specifications & characteristics 1-7 Agilent Technologies 54835A/45A/46A general characteristics 1-14 Recommended test equipment 1-16 General Information
General Information This chapter of the Agilent Technologies Infiniium Oscilloscope Service Guide gives you general information about the instrument. The following topics are covered in this chapter. • • • • • Instrument identification Options Accessories Specifications and characteristics Test equipment requirements Instruments covered by this service guide On the rear panel of the instrument is a serial number label and a VIN # label.
Chapter 1: General Information Accessories supplied Accessories supplied The following accessories are supplied.
Chapter 1: General Information Options available Options available The following options are available for the Agilent Technologies Infiniium oscilloscope. Table 1-2 Agilent Technologies Infiniium Oscilloscope Model 54835A/45A/46A Options Option Number Description 090 Delete standard probes 001 Add 2 standard probes—Agilent 1161A probes for the Agilent 54835A/45A/46A 002 Add 1 Agilent 1162A 1:1 passive probe 003 Add 1 Agilent 1163A 10:1 500 Ω, low-C passive probe 006 Add 1 Agilent 1152A 2.
Chapter 1: General Information Accessories available Accessories available The following accessories are available for use with the Agilent Technologies Infiniium oscilloscope.
Chapter 1: General Information Accessories available Agilent E2612A Touchpad Pointing Device Agilent E2625A Communication Mask Test Kit Agilent 54810-68703 Service Kit (includes service software and fan safety shield) Agilent 54801-00601 Fan Safety Shield (clips onto side of chassis with cover removed) Agilent E2635A Voice Control Retrofit Kit Agilent E2636A Microphone Replacement 1–6
Chapter 1: General Information Specifications & characteristics Specifications & characteristics The following tables list the performance specifications and operating characteristics for the Agilent Technologies 54835A/45A/46A oscilloscope. Asterisks (*) denotes warranted specifications, all others are typical. Specifications are valid after a 30 minute warm-up period, and within ± 5 °C from the self-calibration temperature.
Chapter 1: General Information Specifications & characteristics Vertical Number of Channels 4 (simultaneous acquisition) Bandwidth Analog Bandwidth (-3dB)* 50Ω: 1.0 GHz — Agilent 54835A 50Ω: 1.5 GHz — Agilent 54845A 50Ω: 2.25 GHz — Agilent 54846A 1 MΩ: 500 MHz (with Agilent 1161A probe) System Bandwidth Agilent 1161A 10:1 passive probe: 500 MHz Agilent 1162A 1:1 passive probe: 25 MHz Agilent 1163A 10:1, 500 Ω passive probe: 1.5 GHz Agilent 1152A 2.5 GHz, 0.6 pF active probe: 1.
Chapter 1: General Information Specifications & characteristics Offset Accuracy*2 ± (1.00% of channel offset + 1% of full scale) at full-resolution channel scale. dc Voltage Measurement Accuracy*2 Dual Cursor ±[(dc gain accuracy)+(resolution)] Single Cursor ±[(dc gain accuracy) +(offset accuracy)+(resolution/2)] AutoProbe Interface AutoProbe is an intelligent communication and power link between compatible probes and Infiniium scopes.
Chapter 1: General Information Specifications & characteristics Trigger Sensitivity*2 Internal dc to 100 MHz: 0.5 div 100 MHz to 500 MHz: 1.0 div 500 MHz to 1 GHz: 1.5 div Auxiliary dc to 500 MHz: 300 mVpp Maximum Input Voltage* Auxiliary ±15 V, CAT I Minimum Pulse Width (internal, external) 500 ps at > 1.
Chapter 1: General Information Specifications & characteristics Display Display 8.4-inch diagonal color active matrix LCD module incorporating amorphous silicon TFTs. Active Display Area 171 mm x 128 mm (21,888 sq. mm) Waveform Viewing Area 104 mm x 159 mm (16,536 sq. mm) in Full screen mode (graphical user interface off) Display Resolution 640 pixels horizontally x 480 pixels vertically Waveform Colors Select from 100 hues, 0-100% saturation and 0-100% luminosity.
Chapter 1: General Information Specifications & characteristics FFT Frequency Range5 Agilent 54835A — 2-channel mode: Agilent 54835A — 4-channel mode: Agilent 54845A — 2-channel mode: Agilent 54845A — 4-channel mode: Agilent 54846A — 2-channel mode: Agilent 54846A — 4-channel mode: Freq. Accuracy (1/2 frequency resolution)+(7x10-5)(signal frequency) Amplitude Display Power in dBm Signal-to-noise ratio 70 dB at 32K memory depth. Noise floor varies with memory depth and with averaging.
Chapter 1: General Information Specifications & characteristics Video Output 15-pin VGA, full color. Notes 1 Rise Time figures are calculated from: tr=.35/Bandwidth. 2 Magnification is used below the 10 mV/div range and between the major attenuation settings. Full scale is defined as the major attenuator setting over an intermediate setting. (Major settings for 50Ω: 10, 20, 50, 100, 200, 500, 1000 mV Major settings for 1 MΩ: all as for 50Ω plus 2 V) 3 N/A 4 For bandwidth limited signals, tr >=1.
Chapter 1: General Information Agilent Technologies 54835A/45A/46A general characteristics Agilent Technologies 54835A/45A/46A general characteristics The Infiniium oscilloscopes meet the Agilent Technologies Environmental Specification (section 750) for class B-1 products with exceptions as described for temperature.
Chapter 1: General Information Agilent Technologies 54835A/45A/46A general characteristics 1–15
Chapter 1: General Information Recommended test equipment Recommended test equipment The following table is a list of the test equipment required to test performance, calibrate and adjust, and troubleshoot this instrument. The table indicates the critical specification of the test equipment and for which procedure the equipment is necessary. Equipment other than the recommended model may be used if it satisfies the critical specification listed in the table.
2 Setting Up the Oscilloscope 2-3 To inspect the instrument 2-3 To connect power 2-4 To connect the mouse or other pointing device 2-5 To attach the optional trackball 2-5 To connect the keyboard 2-7 To connect to the LAN card 2-7 To connect oscilloscope probes 2-8 To connect a printer 2-9 To connect an external monitor 2-10 To connect the GPIB cable 2-10 To tilt the oscilloscope upward for easier viewing 2-11 To power on the oscilloscope 2-12 To verify basic oscilloscope operation 2-13 To clean the instru
Preparing for Use This chapter shows you how to prepare the Agilent Technologies 54835A/45A/46A oscilloscopes for use. The following areas are covered in this section. • • • • Inspection Setup Connecting a signal Cleaning Following instrument setup is a brief section covering oscilloscope operation. If you are unfamiliar with this oscilloscope's operation, refer to the User’s Quick Start Guide.
Chapter 2: Preparing for Use To inspect the instrument Setting Up the Oscilloscope This section will help you get the instrument ready to use. Included are procedures for: • • • • • • Inspection Connecting power Connecting probes and accessories Connecting peripherals Verifying basic operation Cleaning To inspect the instrument ❏ Inspect the shipping container for damage.
Chapter 2: Preparing for Use To connect power To connect power The instrument Power Factor Correction (PFC) circuitry in the oscilloscope’s power supply operates over a line voltage in the range of 100 to 240 Vac ±10% (the power supply is autoranging to the input voltage and frequency). Line frequency must be in the range 47 to 440 Hz. Power consumption is 390W maximum. 1 Position the instrument where it will have sufficient clearance for airflow around the top, back, and sides. Minimum 38.
Chapter 2: Preparing for Use To connect the mouse or other pointing device To connect the mouse or other pointing device • Plug the mouse into the matching connector on the back panel of the oscilloscope. The mouse is included with the oscilloscope, but using it is optional.
Chapter 2: Preparing for Use To attach the optional trackball 2 While holding the latch in, slide the metal tabs up and to the rear of the oscilloscope until they fully engage the slot. 3 Release the latch. The trackball baseplate should now be secure against the side of the oscilloscope. 4 Snap the trackball assembly onto the pins of the baseplate. The trackball and buttons should face up and toward the front of the oscilloscope.
Chapter 2: Preparing for Use To connect the keyboard To connect the keyboard • Plug the keyboard cable into the matching connector on the back panel of the oscilloscope. The keyboard simplifies access to some oscilloscope functions, such as entering file names when you store waveforms and setups to the disk. If you need to free desk space, place the keyboard on top of the instrument. Do not stack other objects on the keyboard; this will cause self-test failures on power-on.
Chapter 2: Preparing for Use To connect oscilloscope probes To connect oscilloscope probes 1 Attach the probe BNC connector to the desired oscilloscope channel or trigger input. Push it straight on until it latches into place. 2 Connect the probe to the circuit of interest using grabbers or other probing aids. 3 To disconnect the probe, push the small latch on top of the probe connector to the left, then pull the connector body away from the front panel of the oscilloscope without twisting it.
Chapter 2: Preparing for Use To connect a printer To connect a printer If you have a parallel (Centronics) printer, you will need a parallel printer cable, such as an Agilent C2950A (2 m) or Agilent C2951A (3 m) cable. Go to step 1. If you have a serial printer, you will need a 9-pin to 25-pin serial printer cable, such as an Agilent 34398A cable, plus the Agilent 34399A adapter kit. Some printers may require other cable configurations, but the oscilloscope has a 9-pin serial connector. Go to step 4.
Chapter 2: Preparing for Use To connect an external monitor 5 Attach the 25-pin “D” connector to the serial input port of the printer. Tighten the thumbscrews to secure the cable. 6 Set the printer configuration to use the serial interface. Refer to the User’s Quick Start Guide for software installation instructions. See the documentation for your printer if you have questions about configuring the printer to use the serial interface.
Chapter 2: Preparing for Use To tilt the oscilloscope upward for easier viewing To tilt the oscilloscope upward for easier viewing • If your oscilloscope has front feet with individual wire bails, lift up the front of the oscilloscope, grasp one of the wire bails under the front corner, and pull it down and forward until it latches into place. Repeat for the other wire bail.
Chapter 2: Preparing for Use To power on the oscilloscope To power on the oscilloscope • Depress the power switch at the lower left-hand corner of the oscilloscope front panel. After a short initialization period, the oscilloscope display appears. The oscilloscope is ready to use. Hook up all cables and accessories before applying power. You can connect and disconnect probes while the oscilloscope is powered-on.
Chapter 2: Preparing for Use To verify basic oscilloscope operation To verify basic oscilloscope operation 1 Connect an oscilloscope probe to channel 1. 2 Attach the probe to the calibration output on the front panel of the oscilloscope. Use a probe grabber tip so you do not need to hold the probe. The calibration output is marked with a square wave symbol. Calibration Output 3 Press the Default Setup key on the front panel.
Chapter 2: Preparing for Use To clean the instrument To clean the instrument • Clean the oscilloscope with a soft cloth dampened with a mild soap and water solution. CA UT IO N BE CAREFUL TO AVOID DAMAGING COMPONENTS! Do not use too much liquid when cleaning the oscilloscope. Water can enter the front panel keyboard, damaging sensitive electronic components. To clean the display monitor contrast filter • Clean the display monitor contrast filter using glass cleaner and lens tissue or a soft cloth.
3 Testing Interval 3-2 Equipment Required 3-2 Self-Test Verification 3-2 Test Record 3-3 Operating Hints 3-3 Specifications 3-3 Performance Test Procedures 3-3 To test the dc calibrator 3-4 Procedure 3-4 To test input resistance 3-6 Procedure 3-6 To test voltage measurement accuracy 3-7 Procedure 3-7 To test offset accuracy 3-11 Procedure 3-11 To test bandwidth 3-13 Equivalent Time Test 3-13 Real Time Test 3-15 1 MΩ, 500 MHz Test 3-15 To test time measurement accuracy 3-16 Equivalent Time Mode Procedure 3-
Testing Performance The procedures in this section test measurement performance using Performance Specifications given in chapter 1 as performance standards. Specifications applicable to individual tests are noted at the test for reference. Testing Interval The performance test procedures may be performed for incoming inspection of the instrument and should be performed periodically thereafter to ensure and maintain peak performance.
Chapter 3: Testing Performance Test Record You can record the results of the performance tests in the Performance Test Record provided at the end of this chapter. The Performance Test Record lists the performance tests and provides an area to mark test results. You can use the results recorded at incoming inspection for later comparisons during periodic maintenance, troubleshooting, and after repairs or adjustments.
Chapter 3: Testing Performance To test the dc calibrator To test the dc calibrator The Aux Out BNC on the front panel is used for self-calibration and probe calibration. Though calibrator accuracy is not specified in the performance specifications, it must be within limits in order to provide accurate self-calibration. Test Limits: -2.5 v to +2.5 v, Accuracy ±0.2% of delta voltage output Equipment Required Equipment Critical Specifications Recommended Model/Part Digital Multimeter 0.
Chapter 3: Testing Performance To test the dc calibrator Figure 3-2 Set Aux Output to DC Set the output voltage Selecting DC in the Calibration Dialog 6 Set the dc output voltage to +2.500 V using the Level spin box or the numeric keypad dialog. You can access the numeric keypad dialog by clicking on the value in the Level box. Enter the values by clicking on digits, signs, and exponents in the keypad. Click Close when finished. 7 The DVM should read near +2.500 V.
Chapter 3: Testing Performance To test input resistance To test input resistance This test checks the input resistance of the vertical inputs. A four-wire measurement is used to accurately measure the 50-Ω and 1-MΩ inputs. Specification: 1 MΩ ±1% and 50 Ω ±1.5% Equipment Required Equipment Critical Specifications Recommended Model/Part Digital Multimeter Measure resistance (4-wire) at better than 0.
Chapter 3: Testing Performance To test voltage measurement accuracy To test voltage measurement accuracy This test verifies the voltage measurement accuracy of the instrument. The measurement is made using dual-cursor automatic measurement so that offset errors are not a factor. A power supply provides a reference voltage to check voltage measurement accuracy. The actual supply voltage is monitored for accuracy using a NIST-traceable voltmeter.
Chapter 3: Testing Performance To test voltage measurement accuracy Figure 3-4 Voltage Measurement Accuracy Equipment Setup 2 Press Default Setup to set the oscilloscope to default conditions. 3 Set all channels to dc using the Coupling key and to 1 MΩ input impedance using the Input key. 4 Using the mouse, enable the graphical interface. 5 Select Acquisition from the Setup menu. 6 Select Equivalent Time sampling mode. Enable Averaging.
Chapter 3: Testing Performance To test voltage measurement accuracy Scale Offset Supply Tolerance Limits 2 V/div* 2.5 V 5V ±163.8 V 4.836 V to 5.164 V 1 V/div 2.5 V 5V ±82 mV 4.918 to 5.082 V 500 mV 1.75 V 3.5 V ±41 mV 3.459 to 3.541 V 200 mV 700 mV 1.4 V ±16.4 mV 1.384 to 1.416 V 100 mV 350 mV 700 mV ±8.2 mV 691.8 mV to 708.2 mV 50 mV 175 mV 350 mV ±4.1 mV 345.9 mV to 354.1 mV 20 mV 70 mV 140 mV ±1.64 mV 138.36 mV to 141.64 mV 10 mV 35 mV 70 mV ±0.819 mV 69.
Chapter 3: Testing Performance To test voltage measurement accuracy Figure 3-7 Set the scale from the table Set the offset from the table Vertical Scaling and Offset for Voltage Accuracy Measurement To Set Vertical Scale and Position You can also use the knobs to set the vertical scale and position, but it is usually easier to use the dialog box, particularly for the fine position setting. 11 With the supply disconnected from the channel input, note the Vavg mean reading.
Chapter 3: Testing Performance To test offset accuracy To test offset accuracy This test checks the vertical offset accuracy. Specification: ±(1.00% of channel offset + 1% of full scale) at full-resolution channel scale Equipment Required Equipment Critical Specifications Recommended Model/Part Power Supply 0.5 V to 2 Vdc, ±1 mV accuracy Agilent 6114A Digital Multimeter (DVM) Better than 0.
Chapter 3: Testing Performance To test offset accuracy 8 Set the supply voltage to 2.00 V as in the first row of the table. Use the DVM to verify the setting. 9 Re-adjust the vertical position, if necessary, so the trace is as close to the horizontal center line of the grid as possible after it has settled (averaging complete). 10 Read the position voltage. It should be equal to the DVM reading, within the limits given in the table. Record the reading in the Performance Test Record.
Chapter 3: Testing Performance To test bandwidth To test bandwidth This test checks the bandwidth of the oscilloscope. The Agilent 54845A bandwidth at 1.5 GHz and the Agilent 54846A bandwidth at 2.25 GHz oscilloscopes are checked using aliasing since the trigger specification of these oscilloscopes is 1 GHz. The 1.5 GHz or the 2.
Chapter 3: Testing Performance To test bandwidth 7 Select Vamptd from the Voltage submenu of the Measure menu. 8 Note the Vamptd (1) reading at the bottom of the screen. V10MHz =_______________mV. 9 Set the power meter Cal Factor % to the 10 MHz value from the calibration chart on the power sensor. Then press dB[REF] on the power meter to set a 0 dB reference. This establishes the baseline output power at 10 MHz as a reference for the bandwidth measurement.
Chapter 3: Testing Performance To test bandwidth 19 Repeat steps 4 through 18 for the remaining channels, setting the parameters of the channel being tested where appropriate. Real Time Test 20 Select Acquisition from the Setup menu. 21 Select Real Time sampling mode, 8 GSa/s (Agilent 54845A and 54846A) or 4 GSa/s 22 23 24 25 (Agilent 54835A) configuration, then click Close. Repeat steps 4 through 19, testing channels 1 and 3 to the 2.25 GHz limit (54846A), 1.5 GHz limit (Agilent 54845A), or the 1.
Chapter 3: Testing Performance To test time measurement accuracy To test time measurement accuracy This test uses a precise frequency source to check the accuracy of time measurement functions. Specification Delta-t accuracy Equivalent Time: (≥16 averages) ±[(0.007% × delta-t) + (full scale/(2 × memory depth))+ 30 ps] Real Time: * ±[(0.007% × delta-t) + (0.2 × sample period)] * The specification applies to bandwidth limited signals (tr ≥ 1.4 × sample period).
Chapter 3: Testing Performance To test time measurement accuracy 8 Select horizontal from the setup mean. Set the scale to 5 ns/div, position at –5 ns, and reference to the left. Figure 3-8 Horizontal Setup for Equivalent Time Procedure 9 Adjust the signal generator output voltage to obtain a waveform with a risetime of approximately 700 ps to 1.4 ns. You can measure the risetime by selecting the Risetime command from the Time submenu of the Measure menu. See figure 3-9.
Chapter 3: Testing Performance To test time measurement accuracy 11 Select Equivalent Time sampling mode. Enable Averaging and set the # Points to be averaged to 16. Select Manual Memory Depth. Set the memory depth to 2004 points. Click Close. See figure 3-10. Figure 3-10 Acquisition Setup for Equivalent Time Procedure 12 Select Delta Time from the Time submenu of the Measure menu. Select Channel 1 as the source in the dialog that appears and click Close. See figure 3-11.
Chapter 3: Testing Performance To test time measurement accuracy Figure 3-12 Measurement Settings for Time Interval Measurement For valid statistical data In equivalent time mode, measurement specifications are valid with sixteen or more acquisitions averaged. Statistics accumulated before the required number of averaged acquisitions may show the instrument to fail the specification.
Chapter 3: Testing Performance To test time measurement accuracy 26 Clear measurement statistics as in step 18 and restart the measurement. 27 The delta time reading should be 1 µs ± 2.595 ns, minimum 997.4 ns and maximum 1.0026 µs. Record the minimum and maximum readings in the Performance Test Record. 28 Select Measurement Definitions from the Customize submenu of the Measure menu. (If you have code Revision A.03.
Chapter 3: Testing Performance To test time measurement accuracy Real-Time Mode Procedure This procedure continues from the previous one. 1 Change the signal generator frequency to 25.31646 MHz (39.49999 ns period). 2 Select Acquisition from the Setup menu. 3 Select Real Time sampling mode. Set Configuration to 8 GSa/s (Agilent 54845A) or 4 GSa/s (Agilent 54835A). Set Sampling Rate to Manual, 8 GSa/s (Agilent 54845A) or 4 GSa/s (Agilent 54835A). Enable Averaging with the number of points set to 16.
Chapter 3: Testing Performance To test time measurement accuracy 7 Clear measurements. 8 Select Period from the Time submenu of the Measure menu. 9 Period should be the following. For Agilent 54835A: 39.50 ns ± 53 ps, minimum 39.447 ns, maximum 39.553 ns. Record the minimum and maximum readings in the Performance Test Record. For Agilent 54845A: 39.50 ns ± 28 ps, minimum 39.47 ns, maximum 39.53 ns. Record the minimum and maximum readings in the Performance Test Record.
Chapter 3: Testing Performance To test trigger sensitivity To test trigger sensitivity This test checks channel and external triggers for sensitivity at rated bandwidth. Specification Internal: dc to 500 MHz: 0.5 div 100 MHz to 500 MHz: 1.0 div 500 MHz to 1 GHz: 1.5 div Auxiliary: dc to 500 MHz: 300 mVpp Equipment Required Equipment Critical Specifications Recommended Model/Part Signal Generator 100 and 500 MHz, 1.0 GHz, 30-80 mVrms output Agilent 8664A Power Splitter outputs differ by <0.
Chapter 3: Testing Performance To test trigger sensitivity 5 Turn on Channel 1 and turn off all other channels. You can do this by using the channel keys above each input BNC or by using the check boxes at the top of the waveform display area. 6 Set vertical scale for channel 1 to 200 mV/div. Select dc coupling and 50Ω input impedance. 7 With an N cable and N-to-BNC adapter, connect the signal generator to the channel 1 input. 8 Set the signal frequency to 100 MHz and output level for 0.
Chapter 3: Testing Performance To test trigger sensitivity 17 18 19 20 21 Adjust the horizontal sweep speed to 1 ns/div. Adjust the trigger level for a stable display. The test passes if triggering is stable. Record the result in the Performance Test Record. Connect the signal generator to the channel 2 input. Repeat steps 4 through 20 for the remaining channels. Procedure—Auxiliary Trigger Test The auxiliary trigger input is on the front panel of the oscilloscope near the vertical inputs.
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Performance Test Record Agilent Technologies Agilent Technologies 54835A/45A/46A Oscilloscope Model Number _____________________ Tested by___________________ Serial Number ___________________________ Work Order No.
Test Bandwidth (50Ω Input) Limits Results Down from reference: Equivalent Time Channel 1 Agilent 54835A <3.0 dB at 1000 MHz ___________ Agilent 54845A <3.0 dB at 1500 MHz Agilent 54846A <3.0 dB at 2250 MHz Channel 2 Channel 3 Channel 4 ___________ ___________ ___________ Realtime Bandwidth (1 MΩ Input) Time measurement accuracy— equivalent time mode Time measurement accuracy— real time mode 2 channel (4 GSa/s) 2 channel (8 GSa/s) 2 channel (8 GSa/s) Agilent 54835A <3.
4 Equipment Required 4-2 Self Calibration Interval and Hardware Adjustments 4-2 Mainframe Cal Factor Memory Error 4-2 Operating Hints 4-3 Loading Default Oscilloscope Settings 4-3 Loading New Software 4-3 Calibration Procedures 4-3 To check the power supply 4-4 To check the 715 Hz auxiliary output (probe compensation squarewave) 4-6 To check the flat panel display (FPD) 4-7 To run the self calibration 4-10 Calibrating and Adjusting
Calibrating and Adjusting This chapter provides firmware (self calibration) and hardware adjustment procedures for the Agilent Technologies 54835A/45A/46A oscilloscope. • • • • Power Supply Check Oscillator Check Flat-Panel Display Check self calibration Equipment Required Equipment required for adjustments is listed in the Recommended Test Equipment table in chapter 1 of this manual. Any equipment that satisfies the critical specification listed in the table may be substituted for the recommended model.
Chapter 4: Calibrating and Adjusting Operating Hints Some knowledge of operating the Agilent Technologies 54835A/45A/46A oscilloscope is helpful. However, procedures are written so that little experience is necessary. The following hints will speed progress of the procedures. When using many averages, it often takes awhile for a waveform display to stabilize after a change. When a front panel control on the oscilloscope is changed, averaging automatically restarts.
Chapter 4: Calibrating and Adjusting To check the power supply To check the power supply There are no adjustments for the supply. Perform this procedure only if you suspect a power supply problem. Equipment Required Equipment Critical Specifications Recommended Model/Part Digital Voltmeter Accuracy ±0.05% Agilent 34401A Procedure 1 Disconnect the oscilloscope power cord and remove the cover. If necessary, refer to the procedures in chapter 6, “Replacing Assemblies.
Chapter 4: Calibrating and Adjusting To check the power supply 4 Connect the common lead of the voltmeter to the GND test point. 5 Connect the positive lead of the voltmeter to the +5.1 V test point. 6 Verify that the +5.1 supply voltage is within limits as shown in the following table: Table 4-1 Power Supply Voltage Limits Supply Voltage Specification Limits +5.1 V ± 0.1 V +5.0 V to +5.2 V -5.2 V ± 0.1 V -5.1 V to -5.3 V +12.2 V ± 0.3 V +11.9 V to +12.5 V -12.2 V ± 0.3 V -11.9 V to -12.
Chapter 4: Calibrating and Adjusting To check the 715 Hz auxiliary output (probe compensation squarewave) To check the 715 Hz auxiliary output (probe compensation squarewave) This test is optional. The 715 Hz auxiliary output is not specified in the oscilloscope performance specifications. The values given are typical. Results are not recorded in the Performance Test Record. Equipment Required You can check the 715 Hz auxiliary output using the scope itself. Procedure 1 2 3 4 5 6 7 Press Default Setup.
Chapter 4: Calibrating and Adjusting To check the flat panel display (FPD) To check the flat panel display (FPD) No equipment is required for this procedure. Specifications for flat-panel displays used in the Infiniium oscilloscope are shown in the following table. Flat-Panel Display Specifications Defect Type Polarizer Dot Defect (A dot is defined as 1, 2, or 3 stuck subpixels touching horizontally. Subpixels are horizontal red, green, blue triads, so these may show up as one of 8 colors or black.
Chapter 4: Calibrating and Adjusting To check the flat panel display (FPD) Figure 4-2 Click to start the test Select Screen to do the flat-panel display test Starting the Screen Test 5 Click Start. A new dialog appears with a series of radio buttons that allow selection of different background colors. See figure 4-3.
Chapter 4: Calibrating and Adjusting To check the flat panel display (FPD) Figure 4-3 Click one of these buttons to select the background color to check Screen Test 6 Select a color by clicking the radio button for that color. 7 Carefully check the colored region for pixels colored differently than the current selection. These pixels are either inactive or stuck.
Chapter 4: Calibrating and Adjusting To run the self calibration To run the self calibration The self calibration uses signals generated in the oscilloscope to calibrate channel sensitivity, offsets, and trigger parameters.
Chapter 4: Calibrating and Adjusting To run the self calibration Figure 4-4 Clear this check box before starting calibration Click here to start calibration Calibration Dialog Clear Cal Memory Protect to Run self calibration You cannot run self calibration if this box is checked. 4 Click Start, then follow the instructions on the screen. You will be asked first to disconnect all channels and the Aux Output, then to connect Aux Out to each channel and the auxiliary trigger in turn.
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5 Safety 5-2 Tools Required 5-2 ESD Precautions 5-2 Keystroke Conventions 5-2 Default Setup 5-3 To install the fan safety shield 5-3 To troubleshoot the instrument 5-4 Primary Trouble Isolation 5-6 No Display Trouble Isolation 5-9 Power Supply Trouble Isolation 5-13 To check probe power outputs 5-16 To check the keyboard 5-17 Test Procedure 5-17 Troubleshooting Procedure 5-18 To check the LEDs 5-19 To check the motherboard, CPU, and RAM 5-21 To check the SVGA display board video signals 5-22 To check the b
Troubleshooting This section provides troubleshooting information for the Agilent Technologies 54835A/45A/46A oscilloscope. The service strategy of this instrument is replacement of defective assemblies. Safety Read the Safety Summary at the front of this manual before servicing the instrument. Before performing any procedure, review it for cautions and warnings.
Chapter 5: Troubleshooting To install the fan safety shield Default Setup A Default Setup is provided to assure the instrument setup is in a known default state. The default setup prevents previous setups from interfering with the next test. It also simplifies the instrument setup procedure. Use the default setup when a procedure requires it. • Press the Default Setup key to set the instrument to the default state.
Chapter 5: Troubleshooting To troubleshoot the instrument To troubleshoot the instrument The troubleshooting procedure is used to isolate problems to a faulty assembly. When you find the faulty assembly, use the disassembly and assembly procedures in chapter 6 to replace the assembly. The primary procedural tool in this section is the flowchart.
Chapter 5: Troubleshooting To troubleshoot the instrument Primary Trouble Isolation A Perform Power-Up B Check Display Display on Screen? No Go to No Display Troubleshooting No Go to Acquisition Troubleshooting Yes C Run Scope Self Tests Scope Self-Tests Pass? Yes D Check Front Panel Response E Front Panel Response OK? No Yes Run Knob, Key, and LED Tests Knob, Key, and LED tests pass? No Keyboard Troubleshooting Yes F System Works; Run Self-Calibration; Do Performance Tests End Primary
Chapter 5: Troubleshooting Primary Trouble Isolation Primary Trouble Isolation The actions in the Primary Trouble Isolation are done without disassembling the instrument. Interaction of the front panel with the rest of the instrument and other indicators are used to help identify the problem area. A letter is assigned to boxes in the flowchart. The letter corresponds to a specific section in the reference text. Be sure to use the flowchart itself for your troubleshooting path. A Perform power-up.
Chapter 5: Troubleshooting Primary Trouble Isolation C Run oscilloscope self-tests. 1 Enable the graphical interface. 2 Select Self Test from the Utilities menu. 3 Select Scope Self Tests from the Self Test drop down list box. 4 Click the Start Test button and follow the instructions on the screen. If any of the selftests fail, go to the Acquisition Trouble Isolation troubleshooting flowchart later in this chapter for further troubleshooting. Otherwise, go to step D. D Check the front panel.
Chapter 5: Troubleshooting Primary Trouble Isolation No Display Trouble Isolation Chart A Remove cabinet and install fan guard B Check fan connections and power-on Fans running? Power LED Lit? No Yes C Connect external monitor, cycle power, and check power up sequence Power-up displayed on ext. monitor? No Use visual & audible powerup sequence chart, troubleshoot & repair. No Replace SVGA Card Yes D Check video to flatpanel display Video to flatpanel display OK? Yes Check backlight, etc.
Chapter 5: Troubleshooting No Display Trouble Isolation No Display Trouble Isolation This trouble isolation procedure helps isolate a problem to the assembly level when there is no display on the flat-panel liquid crystal display screen. A Remove the cabinet and install the fan safety shield. 1 Disconnect the power cord from the oscilloscope. Refer to chapter 6, “Replacing Assemblies,” for instructions on removing the cabinet. Use care in handling the instrument.
Chapter 5: Troubleshooting No Display Trouble Isolation Table 5-1 Power-On Sequence with External Monitor Connected Time Audible Indicators Visible Indicators Description Troubleshooting 1 Power-on 2 Fans begin running Power switch LED illuminates The main instrument fan and the CPU fan start running at power on. The LED located behind the front panel power switch is connected to the +5 V supply, making it a good power supply indicator.
Chapter 5: Troubleshooting No Display Trouble Isolation Time Audible Indicators Visible Indicators Description Troubleshooting 4 HDD clicking* PC Power-On Self Test (POST) memory test message on external monitor. The HDD begins clicking* as it is accessed by the system. The external SVGA monitor shows the POST messages. These messages show the memory test.
Chapter 5: Troubleshooting No Display Trouble Isolation Power Supply Trouble Isolation A Check Power Supply Voltages B Voltages OK? No Check power supply resistances C Yes G Check for display onscreen Resistance OK? Replace shorted assembly No Yes D Yes Display onscreen? Override the Remote Inhibit Signal F No Power supply and display OK, return to primary trouble isolation chart Power supply OK, return to no-display trouble isolation chart Power-up OK? Yes E Check Bias and Remote Inhibit
Chapter 5: Troubleshooting Power Supply Trouble Isolation Power Supply Trouble Isolation These trouble isolation instructions help isolate the problem to the assembly level when the power supply is not operating. Because of advanced power supply protection features, the problem may not be with the supply itself, and therefore you will need to work through the procedure systematically to determine the source of the fault. A Check the power supply voltages.
Chapter 5: Troubleshooting Power Supply Trouble Isolation C Replace any shorted assembly. You can locate the shorted assembly by disconnecting assemblies from the power supply, one at a time. Use the power supply distribution chart in table 5-4 as a guide to locating the shorted assembly. Reconnect Assemblies and Cables Reconnect all assemblies after testing. The oscilloscope must have all cables connected for correct power up.
Chapter 5: Troubleshooting Power Supply Trouble Isolation E Check +15 V Bias and Remote Inhibit cabling. If the oscilloscope will not power up, check all cabling to troubleshoot and correct the problem. Figure 5-4 shows the routing of the +15 V Bias and Remote Inhibit signals from the front panel to the power supply. The power supply is on only when the remote inhibit signal is between +1 V and +5 V. A problem could be caused by a faulty cable or bad connector anywhere in this path.
Chapter 5: Troubleshooting To check probe power outputs To check probe power outputs Probe power outputs are on the front panel, surrounding each BNC input. Use the table and figure to the right to check the power output at the connectors. The +12 V and –12 V supplies come directly from the power supply, and the +3 V and –3 V supplies are developed in three-terminal regulators on the probe power & control assembly.
Chapter 5: Troubleshooting To check the keyboard To check the keyboard Test Procedure Use this procedure to verify correct keyboard operation. 1 Enable the graphical interface. 2 Select Self Test from the Utilities menu. 3 Select Knob and Key from the Self Test drop down list box, then click Start. A new window appears with a symbolic representation of the keyboard. See figure 5-6. Figure 5-6 When you push a key or turn a knob in both directions, the corresponding symbol on this screen turns green.
Chapter 5: Troubleshooting To check the keyboard Troubleshooting Procedure Use this procedure only if you encounter key failures in the keyboard test procedure. If any knobs fail, replace the keyboard assembly. 1 Disconnect the power cord and remove the cover. 2 Remove the front panel assembly. See chapter 6 for instructions. 3 Remove the keyboard assembly and the cursor keyboard assembly from the front panel assembly.
Chapter 5: Troubleshooting To check the LEDs To check the LEDs Use the following procedure to test the front-panel LED (light-emitting diode) indicators. 1 Enable the graphical interface. 2 Select Self Test from the Utilities menu. 3 Select LED from the Self Test drop-down list box, then click Start Test. The LED test screen appears, which shows a symbolic representation of all front panel LED indicators. See figure 5-7.
Chapter 5: Troubleshooting To check the LEDs 5 When you are finished, click Close. If you see a failure with the Auto or Trig’d LEDs, check the voltage at pin 6 of W16, with W16 disconnected from the keyboard. The voltage should be as follows: • 0 V ±0.5 V when both LEDs are supposed to be off. • 2.5 V ±0.5 V when Trig'd is supposed to be on and Auto is supposed to be off. • 5.0 V ±0.5 V when both LEDs are supposed to be on.
Chapter 5: Troubleshooting To check the motherboard, CPU, and RAM To check the motherboard, CPU, and RAM This procedure verifies that the PC system board and the associated CPU and RAM are functioning. It assumes that the power supply, SVGA display board, and an external VGA monitor are functioning correctly. 1 Connect an external keyboard to the keyboard port. 2 Connect an external VGA monitor to the VGA output connector on the rear panel.
Chapter 5: Troubleshooting To check the SVGA display board video signals To check the SVGA display board video signals The video signals are checked on the 40-pin connector J103 on the SVGA display board A5. Use a 100-MHz, general-purpose oscilloscope, such as the Agilent Technologies 54600B, to verify the signals. Even-numbered pins are on the top side of the connector. The video signals are present during the system boot process before the backlights come on.
Chapter 5: Troubleshooting To check the backlight inverter voltages To check the backlight inverter voltages The backlight inverter board A3 is located in the front-left corner of the oscilloscope (as you face the front panel). • There is one input connector on the side of the board. • There are two output connectors, one at each end of the board (top and bottom), which power the two backlights inserted into the flat panel display.
Chapter 5: Troubleshooting POST Code Listing (AMI Motherboard only) POST Code Listing (AMI Motherboard only) Use the following listing to troubleshoot the motherboard. You will need a POST (Power-On Self Test) card installed in an ISA slot to use this listing. POST Code Listing Checkpoint Code Description D0h The NMI is disabled. Power on delay is starting. Next, the initialization code checksum will be verified. D1h Initializing the DMA controller. D3h Starting memory sizing next.
Chapter 5: Troubleshooting POST Code Listing (AMI Motherboard only) Uncompressed Initialization Codes The following runtime checkpoint codes are listed in order of execution. These codes are uncompressed in F0000h shadow RAM. Checkpoint Code Description 03h The NMI is disabled. Next, checking for a soft reset or a power on condition. 05h The BIOS stack has been built. Next, disabling cache memory. 06h Uncompressing the POST code next. 07h Next, initializing the CPU and the CPU data area.
Chapter 5: Troubleshooting POST Code Listing (AMI Motherboard only) 2Eh Completed post-video ROM test processing. If the EGA/VGA controller is not found, performing the display memory read/write test next. 2Fh The EGA/VGA controller was not found. The display memory read/write test is about to begin. 30h The display memory read/write test passed. Look for retrace checking next. 31h The display memory read/write test or retrace checking failed. Performing the alternate display memory read/write next.
Chapter 5: Troubleshooting POST Code Listing (AMI Motherboard only) 57h The A20 address line, parity, and the NMI are disabled. Adjusting the memory size depending on relocation and shadowing next. 58h The memory size was adjusting for relocation and shadowing. Clearing the Hit message next. 59h The Hit message is cleared. The AIT... message is displayed. Starting the DMA and interrupt controller test next. 60h The DMA page register test passed.
Chapter 5: Troubleshooting POST Code Listing (AMI Motherboard only) 9Bh Returned after setting the RS-232 base address. Performing any required initialization before the Coprocessor text next. 9Ch Required initialization before the Coprocessor test is over. Initializing the Coprocessor next. 9Dh Coprocessor initialized. Performing any required initialization after the Coprocessor text next. 9Eh Initialization after the Coprocessor text is complete.
Chapter 5: Troubleshooting To configure the motherboard jumpers and set up the BIOS To configure the motherboard jumpers and set up the BIOS If the BIOS settings become corrupted, the Infiniium oscilloscope PC motherboard will not recognize the hard drive and the unit will not boot.
Chapter 5: Troubleshooting To configure the motherboard jumpers and set up the BIOS Configuration 3—Series 757 motherboard, 300 MHz CPU, and 1.44 Mbyte floppy drive serial prefix range US3845 through US3909 with rear-panel label VIN # 0251 Infiniium oscilloscopes of configuration 3 were equipped with AMI Series 757 motherboards and the AMD K6/300 or K6-2/300 (300 MHz) processors. These K6 processors are dualvoltage processors with a 2.2 V core and 3.3 V I/O. These dual-voltage processors require a 2.
Chapter 5: Troubleshooting To configure the motherboard jumpers and set up the BIOS Agilent Technologies Service Note Describes Upgrade Details For improved performance and hard disk drive reliability refer to Agilent Technologies Service Note 54810A-06. This service note gives detailed information for upgrading to 64 MB RAM, upgrading to revision 2.51 or newer code, and enabling power management in the BIOS.
Chapter 5: Troubleshooting To configure the motherboard jumpers and set up the BIOS Configuring the AMI Series 727 Motherboard Jumpers There are several jumpers on the motherboard that must be configured to the correct settings for the AMD-K5-PR133 (100 MHz) microprocessor. Figure 5-9 shows the series 727 motherboard.
Chapter 5: Troubleshooting To configure the motherboard jumpers and set up the BIOS The jumpers you must check are J2, J11, J12, J21, J24, J25, J37, and J39. In addition, you need to ensure that the CPU fan is connected to J46 once the CPU is installed. Failure to connect the fan will cause the CPU to overheat and malfunction. CA UT IO N AVOID DAMAGE TO THE CPU BY CORRECTLY CONFIGURING THE JUMPERS! You must configure J2, J11, J12, and J21 before installing the CPU and applying power to the motherboard.
Chapter 5: Troubleshooting To configure the motherboard jumpers and set up the BIOS To configure the AMI Series 727 WINBIOS Parameters Use this procedure to set the motherboard system setup parameters, also known as the WINBIOS setup. 1 2 3 4 Connect the power cable to the oscilloscope. Connect an external VGA monitor to the rear panel connector of the oscilloscope. Connect an external keyboard and a mouse to the oscilloscope.
Chapter 5: Troubleshooting To configure the motherboard jumpers and set up the BIOS You can use the keyboard in the WINBIOS setup to perform various functions. Refer to this table: WINBIOS Keyboard Commands Keystroke Action Change or select a global field. ←, ↑, →, ↓ Change or select the current field. Perform an operation in the current field. + Increment a value. - Decrement a value. Abort any window function. Return to the previous page.
Chapter 5: Troubleshooting To configure the motherboard jumpers and set up the BIOS Table 5-7 Series 727 System Configuration Settings Configuration Item Setting Load Optimal Defaults YES Peripheral Setup (OnBoard Primary/Secondary IDE) Primary Detect IDE Utility (Hard drive Primary Master) Data Standard Setup—Date/Time Enter current values Standard Setup—Floppy Drive A 1.
Chapter 5: Troubleshooting To configure the motherboard jumpers and set up the BIOS Configuring the AMI Series 757 Motherboard for 200 MHz CPU There are several jumpers on the motherboard that must be configured to the correct settings for the AMD-K6 200 MHz microprocessor. Figure 5-10 shows the series 757 Rev C motherboard.
Chapter 5: Troubleshooting To configure the motherboard jumpers and set up the BIOS The jumpers you must check are J5, J6, J7, J8, J14 and J15. You must also install a 2.9 V VRM module in the VRM socket. In addition, you need to ensure that the CPU fan is connected to J13 once the CPU is installed; failure to connect the fan will cause the CPU to overheat and malfunction.
Chapter 5: Troubleshooting To configure the motherboard jumpers and set up the BIOS To configure the AMI Series 757 WINBIOS Parameters with 1.44 Mbyte floppy drive Use this procedure to set the motherboard system setup parameters, also known as the WINBIOS setup. 1 2 3 4 Connect the power cable to the oscilloscope. Connect an external VGA monitor to the rear panel connector of the oscilloscope. Connect an external keyboard and a mouse to the oscilloscope.
Chapter 5: Troubleshooting To configure the motherboard jumpers and set up the BIOS You can use the keyboard in the WINBIOS setup to perform various functions. Refer to the following table: WINBIOS Keyboard Commands Keystroke Action Change or select a global field. ←, ↑, →, ↓ Change or select the current field. Perform an operation in the current field. + Increment a value. - Decrement a value. Abort any window function. Return to the previous page.
Chapter 5: Troubleshooting To configure the motherboard jumpers and set up the BIOS 7 Re-enter the WINBIOS to change one parameter that could not be set in step 6. a Press F1 to enter the BIOS Setup. b Double-click on Detect IDE Utility. The line labeled “Pri. Master” should contain numeric information indicating that it has found a hard drive. Exit this utility. If a hard drive was not found, check Motherboard Hard Drive Cable W9 and SVGA to Hard Drive Cable W10.
Chapter 5: Troubleshooting To configure the motherboard jumpers and set up the BIOS Configuring the AMI Series 757 Motherboard for 300 MHz CPU There are several jumpers on the motherboard that must be configured to the correct settings for the AMD-K6 300 MHz microprocessor. Figure 5-11 shows the series 757 Rev D motherboard.
Chapter 5: Troubleshooting To configure the motherboard jumpers and set up the BIOS The jumpers you must check are J5, J6, J7, J8, J14, J15 and J16. You must also install a 2.2 V VRM module in the VRM socket. In addition, you need to ensure that the CPU fan is connected to J13 once the CPU is installed. Failure to connect the fan will cause the CPU to overheat and malfunction.
Chapter 5: Troubleshooting To configure the motherboard jumpers and set up the BIOS To configure the AMI Series 757 WINBIOS Parameters with 120 Mbyte floppy drive Use this procedure to set the motherboard system setup parameters, also known as the WINBIOS setup. 1 2 3 4 Connect the power cable to the oscilloscope. Connect an external VGA monitor to the rear panel connector of the oscilloscope. Connect an external keyboard and a mouse to the oscilloscope.
Chapter 5: Troubleshooting To configure the motherboard jumpers and set up the BIOS You can use the keyboard in the WINBIOS setup to perform various functions. Refer to the following table: WINBIOS Keyboard Commands Keystroke Action Change or select a global field. ←, ↑, →, ↓ Change or select the current field. Perform an operation in the current field. + Increment a value. - Decrement a value. Abort any window function. Return to the previous page.
Chapter 5: Troubleshooting To configure the motherboard jumpers and set up the BIOS 7 Re-enter the WINBIOS to change one parameter that could not be set in step 6. a Press F1 to enter the BIOS Setup. b Double-click on Detect IDE Utility. The line labeled “Pri. Master” should contain numeric information indicating that it has found a hard drive. Exit this utility. If a hard drive was not found, check Motherboard Hard Drive Cable W9 and SVGA to Hard Drive Cable W10.
Chapter 5: Troubleshooting To configure the motherboard jumpers and set up the BIOS Configuring the FIC VA-503A motherboard switches for the 400 MHz CPU and 120 Mbyte floppy drive There are switches and a jumper on the FIC VA-503A motherboard that must be configured to the correct settings for the AMD K6-2/400 MHz microprocessor. The FIC VA-503A motherboard is shown in the following figure.
Chapter 5: Troubleshooting To configure the motherboard jumpers and set up the BIOS To Configure the FIC Series VA-503A Motherboard BIOS Parameters Use this procedure to set the FIC VA-503A motherboard BIOS. 1 2 3 4 Connect the power cable to the Infiniium oscilloscope. Connect the mouse to the rear panel of the oscilloscope. Connect the external keyboard to the rear panel. Power up the Infiniium. A message similar to the following should appear on the screen. Award Modular BIOS v.4.
Chapter 5: Troubleshooting To troubleshoot the acquisition system 12 Under Integrated Peripherals, change these settings: a Onboard FDD Controller b Onchip IDE second channel Disabled Disabled When you are finished, press Esc to exit the menu. 13 Press F10 to save and exit the setup. Type “Y” to save changes. To troubleshoot the acquisition system This procedure will help you isolate problems to the assembly or firmware level when the builtin Self Test routine shows acquisition system failures.
Chapter 5: Troubleshooting To troubleshoot the acquisition system Acquisition Trouble Isolation (1 of 4) 5–50
Chapter 5: Troubleshooting To troubleshoot the acquisition system Acquisition Trouble Isolation (2 of 4) 5–51
Chapter 5: Troubleshooting To troubleshoot the acquisition system Acquisition Trouble Isolation (3 of 4) 5–52
Chapter 5: Troubleshooting To troubleshoot the acquisition system Acquisition Trouble Isolation (4 of 4) A A to D Converter Failed Failure of this test may involve failure in the Gain test. If the Gain test also fails, first attempt to correct the cause of the Gain test failure by running the Extended Service test for Gain.
Chapter 5: Troubleshooting To troubleshoot the acquisition system B FISO failed When this test fails, run the Extended Service test for the A to D Converter. If any of the channels pass the extended service A to D Converter test, you can swap an A to D hybrid from a known good channel to a suspected failing channel to verify the problem, or simply replace the failing A to D hybrid with a new hybrid. C Probe Board failed Replace the Probe Power and Control assembly.
Chapter 5: Troubleshooting To troubleshoot the acquisition system K Interpolator failed Replace the acquisition assembly when this test fails. Before you replace the acquisition assembly with a factory rebuilt exchange assembly, record the contact closure information for each channel onto the labels attached to each attenuator. Agilent Technologies uses this to determine when to replace the attenuators to insure quality of future exchange assemblies.
Chapter 5: Troubleshooting To troubleshoot attenuator failures To troubleshoot attenuator failures The best method for troubleshooting attenuator assembly failures is to swap the suspected one with a known good one. This discussion will help you determine whether the attenuator or acquisition board is causing a problem. The attenuator assembly consists of attenuators and a preamplifier for two channels.
Chapter 5: Troubleshooting To troubleshoot attenuator failures Swapping Attenuators Attenuator swapping is the best method of finding a faulty attenuator. All input channels of the Infiniium oscilloscope use identical attenuator assemblies. The attenuators for channels 1/2 and 3/4 have been manufactured into assemblies to enhance sampling performance. This troubleshooting method provides fast trouble isolation because it is unlikely that multiple channels will experience the same attenuator failure.
Chapter 5: Troubleshooting To troubleshoot attenuator failures Attenuator Assembly Troubleshooting Set attenuator contact counter to zero for channels where attenuator assembly replaced Replace faulty attenuator assembly and put good assembly back in original channel. Perform Connectivity Test on all channels Do channels fail? Yes Swap failing channel attenuator assembly with known good assembly.
Chapter 5: Troubleshooting Software Revisions Software Revisions • Select About Infiniium... from the Help Menu. Enable the Graphical Interface The graphical interface must be enabled to select this command. A dialog box appears showing the current version number for the scope software and on-line information system software. This information may be useful when contacting Agilent Technologies for further service information. See figure 5-13. Figure 5-13 About Infiniium...
5–60
6 ESD Precautions 6-2 Tools Required 6-2 To return the instrument to Agilent Technologies for service 6-3 To remove and replace the cover 6-4 To disconnect and connect Mylar flex cables 6-5 To remove and replace the AutoProbe assembly 6-6 To remove and replace the probe power and control assembly 6-8 To remove and replace the backlight inverter board 6-9 To remove and replace the front panel assembly 6-9 To remove and replace the keyboard and flat-panel display assemblies 6-12 To remove and replace the acq
Replacing Assemblies Use the procedures in this chapter when removing and replacing assemblies and parts in the Agilent Technologies 54835A/45A oscilloscope. In general, the procedures that follow are placed in the order to be used to remove a particular assembly. The procedures listed first are for assemblies that must be removed first. ESD Precautions When using any of the procedures in this chapter you must use proper ESD precautions.
Chapter 6: Replacing Assemblies To return the instrument to Agilent Technologies for service To return the instrument to Agilent Technologies for service Before shipping the instrument to Agilent Technologies, contact your nearest Agilent Technologies Instrument Support Center (or Agilent Technologies Service Center if outside the United States) for additional details. 1 Write the following information on a tag and attach it to the instrument.
Chapter 6: Replacing Assemblies To remove and replace the cover To remove and replace the cover Use these steps to remove and replace the cover. When necessary, refer to other removal procedures. Disconnect the power cable. Disconnect all scope probes and BNC input cables from the front panel. Disconnect any other cables, such as mouse, keyboard, printer, or GPIB cables. Remove the two Torx T15 screws securing the side handle. Remove the four Torx T15 screws that secure the rear feet (two in each foot).
Chapter 6: Replacing Assemblies To disconnect and connect Mylar flex cables To disconnect and connect Mylar flex cables Use this procedure when you are instructed to disconnect or connect a Mylar flex cable. Such cables and their connectors are fragile; mishandling may damage the cable or connector. To disconnect the cable 1 Pry up the retainer slightly at either end of the connector using a small flat-blade screwdriver. Do not force the retainer; it should remain attached to the body of the socket.
Chapter 6: Replacing Assemblies To remove and replace the AutoProbe assembly To remove and replace the AutoProbe assembly Use this procedure to remove and replace the AutoProbe assembly. When necessary, refer to other removal procedures. 1 Disconnect the power cable and remove the cover.
Chapter 6: Replacing Assemblies To remove and replace the AutoProbe assembly c From the back of the front panel, use a small screw driver or other slender pointed object through the access hole to push the AutoProbe assembly faceplate away from the front panel assembly. Figure 6-6 Pushing Out the AutoProbe Faceplate CA UT IO N AVOID DAMAGE TO THE RIBBON CABLE AND FACEPLATE! Do not pry around the edge of the assembly. Doing so may damage the ribbon cable or faceplate.
Chapter 6: Replacing Assemblies To remove and replace the probe power and control assembly To remove and replace the probe power and control assembly Use this procedure to remove the probe power and control assembly. When necessary, refer to other removal procedures. 1 Disconnect the power cable and remove the cover. 2 Disconnect the mylar flex cable W13 that connects the probe power and control assembly to the AutoProbe assembly. The connector must be unlocked before you can remove the flex cable.
Chapter 6: Replacing Assemblies To remove and replace the backlight inverter board To remove and replace the backlight inverter board Use this procedure to remove and replace the backlight inverter board. When necessary, refer to other removal procedures. WAR N IN G SHOCK HAZARD! The backlight inverter assembly, which is mounted at the front corner of the instrument near the flat-panel display, operates at high voltages from 300-1 kV acrms. DO NOT handle this assembly while it is in operation.
Chapter 6: Replacing Assemblies To remove and replace the front panel assembly Figure 6-9 Removing the BNC Nuts 4 Disconnect the Aux Out SMB cable W18 from J10 and the black Comp wire W19 from J4. Push them to the side. These cables are located behind the Aux Trigger Input BNC connector on the Acquisition board.
Chapter 6: Replacing Assemblies To remove and replace the front panel assembly Figure 6-11 Disconnecting W16, W20, and the Backlight Cables 6 Remove the 4 Torx T15 screws that secure the chassis sides to the front panel assembly. Figure 6-12 Front Panel Side Screws 7 Remove the 2 Torx T10 screws that secure the chassis front to the front panel assembly.
Chapter 6: Replacing Assemblies To remove and replace the keyboard and flat-panel display assemblies To remove and replace the keyboard and flat-panel display assemblies Use these steps to disassemble and re-assemble the front panel assembly, including the keyboard and flat-panel display. Where necessary, refer to other removal procedures. 1 Disconnect the power cable and remove the cover. 2 Remove the front panel assembly from the chassis.
Chapter 6: Replacing Assemblies To remove and replace the keyboard and flat-panel display assemblies 6 To remove the flat-panel display from the front-panel cover plate, remove the four Torx fasteners. 7 To remove the cursor keyboard and flat lens, remove the four Torx T10 screws that secure the lens corners, then carefully remove the lens. You can lift the cursor keyboard directly out of the front casting.
Chapter 6: Replacing Assemblies To remove and replace the acquisition board assembly To remove and replace the acquisition board assembly Use this procedure to remove and replace the acquisition assembly. When necessary, refer to other removal procedures. 1 Disconnect the power cable and remove the cover. 2 Remove the Quick-Probe subpanel assembly. 3 Remove the hex nuts that secure the BNC connectors to the front panel. Use a 9/16” nut-driver to remove the hex nuts. See figure 6–9.
Chapter 6: Replacing Assemblies To remove and replace the LAN interface board To remove and replace the LAN interface board Use this procedure to remove and replace the LAN interface board. When necessary, refer to other removal procedures. 1 Disconnect the power cable and remove the cover. 2 Remove the Torx T15 screw that secures the LAN board to the rear of the chassis. 3 Pull the board up to disengage it from the motherboard, then up and out of the chassis.
Chapter 6: Replacing Assemblies To remove and replace the GPIB interface board To remove and replace the GPIB interface board Use this procedure to remove and replace the GPIB interface board. When necessary, refer to other removal procedures. 1 Disconnect the power cable and remove the cover. 2 Remove the Torx T15 screw that secures the GPIB board to the rear of the chassis. 3 Pull the board up to disengage it from the motherboard, then up and out of the chassis.
Chapter 6: Replacing Assemblies To remove and replace the scope interface board and SVGA display board To remove and replace the scope interface board and SVGA display board Use these steps to remove and replace the scope interface board and SVGA display boards. These boards must be removed and replaced as a unit. When necessary, refer to other removal procedures. 1 Disconnect the power cable and remove the cover.
Chapter 6: Replacing Assemblies To separate the scope interface board and SVGA display board To separate the scope interface board and SVGA display board Use this procedure to separate the scope interface board from the SVGA display board. When necessary, refer to other removal procedures. 1 Remove the scope interface board and the SVGA display board from the card cage. 2 Remove the display board jumper cable W14.
Chapter 6: Replacing Assemblies To remove and replace the Option 200 sound card To remove and replace the Option 200 sound card Use this procedure to remove and replace the sound card. 1 Disconnect the power cable and remove the cover. 2 Remove the Torx T15 screw that secures the sound card to the rear of the chassis. 3 Pull the card up to disengage it from the motherboard, then up and out of the chassis. CA UT IO N AVOID DAMAGE TO CABLES! Be careful to not snag any of the cables.
Chapter 6: Replacing Assemblies To remove and replace the hard disk drive To remove and replace the hard disk drive Use theseg steps to remove and replace the hard disk drive. When necessary, refer to other removal procedures. 1 2 3 4 CA UT IO N Disconnect the power cable and remove the cover. Disconnect the hard disk interface cable W10 from the hard disk drive. Remove the 4 Torx T15 screws that secure the hard disk drive bracket to the chassis.
Chapter 6: Replacing Assemblies To remove and replace the floppy disk drive To remove and replace the floppy disk drive Use this procedure to remove and replace the floppy disk drive. When necessary, refer to other removal procedures. 1 Disconnect the power cable and remove the cover. 2 Disconnect the ribbon cable W8 at the disk drive. 3 Remove the two Torx T8 screws that secure the disk drive to the chassis.
Chapter 6: Replacing Assemblies To remove and replace the motherboard 7 Disconnect these cables from the motherboard: • Hard disk motherboard cable W9 • Floppy motherboard cable W7 • Serial port cables W24 and W25 • Parallel port cable W23 • Mouse connector cable W22 Set all cables out of the way. 8 Remove the Torx T15 screw that holds the mouse connector plate to the back panel of the chassis and remove the mouse connector plate. 9 Remove the 8 Torx T10 screws that secure the motherboard to the chassis.
Chapter 6: Replacing Assemblies To remove and replace the motherboard 13 Once the WINBIOS has been configured, cycle power to start the Windows ’95 operating system and begin the plug-and-play driver installation. Note the following: • Expect several iterations of the plug-and-play recognition and driver installation. Use the Windows '95 drivers when available. • Obtain the 548xx driver disk by contacting the Agilent factory.
Chapter 6: Replacing Assemblies To remove and replace the power supply To remove and replace the power supply Use these steps to remove the power supply assembly. When necessary, refer to other removal procedures. WAR N IN G SHOCK HAZARD! If the power supply is defective is could have a dangerous charge on some capacitors. This charge could remain for many days after removing power from the supply. 1 Disconnect the power cable and remove the cover.
Chapter 6: Replacing Assemblies To remove and replace the fan To remove and replace the fan WAR N IN G AVOID INJURY! The fan blades are exposed both inside and outside the chassis. Disconnect the power cable before working around the fan. Use extreme caution in working with the instrument. Failure to observe these precautions may result in injury. Use this procedure to remove and replace the fan. When necessary, refer to other removal procedures. 1 Disconnect the power cable and remove the cover.
Chapter 6: Replacing Assemblies To remove and replace the CPU To remove and replace the CPU Use this procedure to remove and replace the CPU. When necessary, refer to other removal procedures. 1 Disconnect the power cable and remove the cover. 2 Disconnect the CPU fan cable from the motherboard. 3 Pull the CPU socket release lever laterally away from the socket to disengage the lever from the locking tab. Then rotate the lever upward to release the CPU assembly from the socket.
Chapter 6: Replacing Assemblies To remove and replace RAM SIMMs or SDRAM DIMMs To remove and replace RAM SIMMs or SDRAM DIMMs Use this procedure to remove the cover and disconnect cables, then remove and replace either SIMMs or DIMMs on the motherboard, depending on the type of motherboard in the oscillscope. When necessary, refer to other removal procedures. 1 Disconnect the power cable and remove the cover. 2 Remove the hard disk drive.
Chapter 6: Replacing Assemblies To remove and replace an attenuator To remove and replace an attenuator Use this procedure to remove and replace an attenuator assembly. When necessary, refer to other removal procedures. CA UT IO N ELECTROSTATIC DISCHARGE! Use grounded wrist straps and mats when servicing the acquisition board. Electrostatic discharge can damage electronic components. Do Not Remove the Attenuators from the Acquisition Board Attenuators are part of the acquisition board.
Chapter 6: Replacing Assemblies To remove and replace an attenuator Figure 6-27 Removing an Attenuator If You Permanently Replace Parts When you replace acquisition system components, you should rerun the self calibration routines prior to performance verification or use of the instrument.
Chapter 6: Replacing Assemblies To reset the attenuator contact counter To reset the attenuator contact counter 1 Turn off the Infiniium oscilloscope. 2 Connect a mouse and a keyboard to the oscilloscope. 3 Insert the service disk in the floppy drive and turn on the oscilloscope. For units equipped with a 120 Mbyte floppy drive, do not insert the service disk until the message: Starting Windows 9X... 4 5 6 7 8 9 appears on the screen. The oscilloscope will boot into the Windows® operating system.
Chapter 6: Replacing Assemblies To reset the attenuator contact counter 10 Click the Start Test button. A screen like the following will be displayed. Figure 6-29 Attenuator Relay Actuations Setup 11 In the Attenuator Channel box, select the channel you are changing. 12 Under Set Value, enter the corrected attenuator value using the keyboard or the drop down keypad, then press the button labeled Apply ‘Set Value’ to Actuation Count. 13 Repeat for each channel you need to change.
Chapter 6: Replacing Assemblies To remove and replace an acquisition hybrid To remove and replace an acquisition hybrid Use the following procedure to remove and replace an acquisition hybrid. When necessary, refer to other removal procedures. CA UT IO N ELECTROSTATIC DISCHARGE! Use grounded wrist straps and mats when servicing the acquisition board. Electrostatic discharge can damage electronic components. You do not have to remove the acquisition board before replacing an acquisition hybrid.
Chapter 6: Replacing Assemblies To remove and replace an acquisition hybrid To replace the acquisition hybrid The location of pins and other locator features will guide the alignment of parts. This assembly cannot be assembled incorrectly without forcing. 1 Install the hybrid with the three corner holes over the three large locator pins. 2 Install the top plate with the three cut-out corners over the three locator pins. CA UT IO N DO NOT USE EXCESSIVE FORCE! Tighten the hybrid carefully.
Chapter 6: Replacing Assemblies To remove and replace an acquisition hybrid The Hybrid Connector As shown in the illustration, two screws through the hybrid connector hold the bottom plate to the underside of the PC board. If you remove the connector, the bottom plate can fall away from the board. Sometimes the plate will stick to the bottom of the board by itself because of adhesives that fasten an insulator to the plate.
7 Ordering Replaceable Parts 7-2 Listed Parts 7-2 Unlisted Parts 7-2 Direct Mail Order System 7-2 Exchange Assemblies 7-2 Power Cables and Plug Configurations 7-3 Exploded Views 7-4 Replaceable Parts List 7-15 Replaceable Parts
Replaceable Parts This chapter of the Agilent Technologies Infiniium Oscilloscope Service Guide includes information for ordering parts. Service support for this instrument is replacement of parts to the assembly level. The replaceable parts include assemblies and chassis parts. Ordering Replaceable Parts Listed Parts To order a part in the parts list, quote the Agilent Technologies part number, indicate the quantity desired, and address the order to the nearest Agilent Technologies Sales Office.
Chapter 7: Replaceable Parts Power Cables and Plug Configurations Power Cables and Plug Configurations This instrument is equipped with a three-wire power cable. The type of power cable plug shipped with the instrument depends on the country of destination. The following figure shows option numbers of available power cables and plug configurations. Power Cables and Plug Configurations Plug Type Cable Part No.
Chapter 7: Replaceable Parts Exploded Views Exploded Views A2A1 MP61 MP53 A2 H4 H2 H7 W20 MP50 H9 W16 W19 MP51 MP17 A8 W18, H17, H15 A7 MP64 MP56 MP62 or MP63 MP15 and MP49 H21 MP3 MP8 MP4 MP1 H18 H14 H20 A17 New version W13 MP69 H30 MP54 MP16 A16 A17 New version Front Frame and Front Panel 7–4 A17 Old version
Chapter 7: Replaceable Parts Exploded Views W2 W5 W4 W3 H27 W6 H28 H29 H2 W11 A13A1 W21 A13A2 A13 B1 & B3 A13A5-8 A11 H2 H1 A3 H22 W17 H8 Optional Fan Safety Shield MP60 Fan and Acquisition Assembly 7–5
Chapter 7: Replaceable Parts Exploded Views A1 H2 H2 H2 W4 e Se ppy Flo v Dri ers eV io ra igu f n o nC tion A5 H12 A6 H24 H25 A4 W2 W3 A10 H4 A9 MP57 MP55 MP60 H3 H11 Power Supply and PC Motherboard 7–6
Chapter 7: Replaceable Parts Exploded Views W10 W8 W17 W20 A5 W14 W9 W11 W7 A6 A15 W16 W22 A14 A4A2/A3 (RAM) B2 W24/25 A4A1 W5 A4 W23 W7 H23 W9 AMI Series 727 (Atlas PCI-II) Motherboard for PC Motherboard Configuration 1 7–7
Chapter 7: Replaceable Parts Exploded Views W10 W8 W17 W20 A5 A19 (Option 200) not shown W14 W9 W11 W7 A6 A15 W16 W5 A14 A4A2/A3 (RAM) B2 W22 A4A1 W24/25 A4A4 W7 A4 W23 H23 W9 AMI Series 757 Rev C and Rev D (Atlas PCI-III) Motherboard for PC Motherboard Configurations 2, 3, and 4 7–8
Chapter 7: Replaceable Parts Exploded Views 1.
Chapter 7: Replaceable Parts Exploded Views 120 Mbyte Floppy Drive Configuration for PC Motherboard Configuration 4 7–10
Chapter 7: Replaceable Parts Exploded Views W17 W20 A15 W14 A5 W11 A19 A6 W16 W5 A14 W24/25 W27 W22 B2 A4A1 W23 A4 W9 H23 A4A2 FIC VA-503A Motherboard for PC Motherboard Configuration 5 7–11
Chapter 7: Replaceable Parts Exploded Views 120 Mbyte Floppy Drive Configuration with FIC Motherboard for PC Motherboard Configuration 5 7–12
Chapter 7: Replaceable Parts Exploded Views MP14 H10 MP20 MP52 MP13 H19 MP70 H26 MP70 MP72 MP12 Old version MP19 MP19 MP38 Sleeve and Accessory Pouch 7–13
Chapter 7: Replaceable Parts Exploded Views Attenuator Assembly 7–14
Chapter 7: Replaceable Parts Replaceable Parts List Replaceable Parts List The following table is a list of replaceable parts and is organized as follows: • Exchange assemblies in alphanumeric order by reference designation. • External chassis parts in alphanumeric order by reference designation. These parts are generally those that take the physical wear and tear of use. • Internal parts in several categories. Each category is in alphanumeric order by reference designation.
Chapter 7: Replaceable Parts Replaceable Parts List Replaceable Parts Ref. Des.
Chapter 7: Replaceable Parts Replaceable Parts List Replaceable Parts Ref. Des. Agilent Part Number QTY Description To identify the motherboard configuration, see "To configure the motherboard jumpers and set up the BIOS in chapter 5. Depending on the motherboard configuration, determine which hard drive, motherboard, CPU, RAM, floppy drive, chassis, and cables are used in your unit. PC Motherboard Configuration 1 (AMI 727 Motherboard w/1.
Chapter 7: Replaceable Parts Replaceable Parts List Replaceable Parts Ref. Des. Agilent Part Number QTY Description PC Motherboard Configuration 4 (AMI Motherboard w/120 MByte Floppy Drive)(serial prefix range US3919 through US3935 with rear-panel label VIN # 025) A4 54810-66524 1 A4A1 1821-4976 1 PC Motherboard AMI Series 757 REV D (Atlas PCI-III) Microprocessor - AMD-K6-2/300MHz A4A2-3 1818-7682 2 DRAM-SIMM 8MX32 (32 MB SIMM) A4A4 0950-3399 1 Voltage Regulator Module (VRM) 2.
Chapter 7: Replaceable Parts Replaceable Parts List Replaceable Parts Ref. Des. Agilent Part Number QTY Description All Configurations A5 54810-66525 1 DISPLAY BOARD A6 54801-68703 1 SCOPE INTERFACE BOARD KIT (includes W11 and 54810-66523 pc board or newer)) A7 54815-66504 1 FRONT-PANEL KEYBOARD A8 54810-66507 1 KEYBOARD - CURSOR A9 See PC Motherboard Configurations earlier in this table. A10 See PC Motherboard Configurations earlier in this table.
Chapter 7: Replaceable Parts Replaceable Parts List Replaceable Parts Ref. Des. Agilent Part Number QTY H9 0515-1410 6 MS 3.0 X 0.50 20MM-LG PAN-HD T10 H10 0515-2195 4 MS M4 X 0.7 40MM-LG T15 Description H11 0515-2691 2 MS M2.6X0.45 6MM-LG PAN-HD T8 H12 0624-0633 7 SCREW-TGP 6-20 T15 H14 2190-0027 1 WIL.256 .478 .02 H15 2190-0068 1 WIL.505 .630 .02 H17 2950-0054 1 NUTH 1/2-28 .125 H18 2950-0072 1 NUTH 1/4-32 .
Chapter 7: Replaceable Parts Replaceable Parts List Replaceable Parts Ref. Des. Agilent Part Number W8 See PC Motherboard Configurations earlier in this table. QTY Description W9 See PC Motherboard Configurations earlier in this table. W10 See PC Motherboard Configurations earlier in this table. W11 54801-61612 1 ACQUISITION CABLE (w/ AMP-LATCH(r) connector on each end.
7–22
8 Block-Level Theory 8-3 Power Supply Assembly 8-3 FPD Monitor Assembly 8-3 Acquisition System 8-4 Front Panel 8-4 Disk Drives 8-4 Attenuators 8-4 Motherboard 8-4 SVGA Display Card 8-5 GPIB Interface Card 8-5 Probe Power and Control 8-5 Attenuator Theory 8-7 Acquisition Theory 8-7 Acquisition Board 8-7 Acquisition Modes 8-9 Scope Interface Board 8-9 Theory of Operation
Chapter 8: Theory of Operation Instrument Block Diagram Shown for Original Configuration w/1.
Theory of Operation This Service Guide supports troubleshooting the Agilent Technologies 54835A/45A to assembly level. Theory of operation is included only as supplemental information. It is not comprehensive enough for component-level troubleshooting. Block-Level Theory The Agilent Technologies 54835A Oscilloscope has four channels which are individually sampled at 2 GSa/s. Each channel is stored into 32 Kbytes of memory.
Chapter 8: Theory of Operation Block-Level Theory Acquisition System The acquisition system includes two attenuator assemblies, acquisition board, and scope interface board. The attenuators condition the signal, which is then digitized and stored by the acquisition board. The scope interface board provides the system control interface from the motherboard, and also interfaces the acquisition board to the SVGA display board for display of the acquired data.
Chapter 8: Theory of Operation Block-Level Theory SVGA Display Card The SVGA Display Card controls the flat-panel display monitor. There are two major video paths on this board. The first is used by the system controller on the motherboard to draw all general display elements, including the grid, status indicators, and toolbars and menus for the graphical interface. This is handled through a standard VGA chip, BIOS, and DRAM, similar to a standard PC VGA interface.
Chapter 8: Theory of Operation Block-Level Theory TIME BASE CHANNEL 1,2 TRIGGER Acquisition Block Diagram 8–6
Chapter 8: Theory of Operation Attenuator Theory Attenuator Theory The channel input signals are conditioned by the dual channel attenuator assemblies. There are two completely independent attenuators on each assembly, but one channel can be routed in the preamp/multiplexer hybrid to drive both channel outputs for sample rate doubling purposes. Each channel contains passive attenuators, an impedance converter, and a programmable gain amplifier.
Chapter 8: Theory of Operation Acquisition Theory Trigger There are four main trigger circuits: Trigger Conditioning, Analog Comparators, a Trigger Multiplexer, and Logic Trigger. Trigger signals from the channel are fed to the analog trigger comparators and the trigger conditioning circuit. The trigger conditioning circuitry selects dc, ac, low-frequency reject, high-frequency reject, and noise reject (hysteresis) modes and sets the trigger levels.
Chapter 8: Theory of Operation Acquisition Theory Analog Interface The Analog Interface provides analog control of functions in the acquisition circuitry. It is primarily DACs with accurate references and filtered outputs.
8–10
DECLARATION OF CONFORMITY according to ISO/IEC Guide 22 and EN 45014 Manufacturer’s Name: Agilent Technologies Manufacturer’s Address: Colorado Springs Division 1900 Garden of the Gods Road Colorado Springs, CO 80907 USA declares, that the product Product Name: Infiniium Oscilloscope Model Number(s): Agilent Technologies 54835A/45A/46A Product Option(s): All conforms to the following Product Specifications: Safety: IEC 1010-1:1990+A1 / EN 61010-1:1993 UL 3111 CSA-C22.2 No. 1010.
Product Regulations Safety IEC 1010-1:1990+A1 / EN 61010-1:1993 UL 3111 CSA-C22.2 No.1010.1:1993 EMC This Product meets the requirement of the European Communities (EC) EMC Directive 89/336/EEC. Emissions EN55011/CISPR 11 (ISM, Group 1, Class A equipment) Immunity EN50082-1 IEC 555-2 IEC 555-3 IEC 801-2 (ESD) 8kV AD IEC 801-3 (Rad.) 3 V/m IEC 801-4 (EFT) 0.5 kV, 1kV Sound Pressure Level Code1 Notes2 1 1 2 2 1,2 1 Performance Codes: 1 PASS - Normal operation, no effect.
© Copyright Agilent Technologies 1997-2001 All Rights Reserved. Reproduction, adaptation, or translation without prior written permission is prohibited, except as allowed under the copyright laws. Restricted Rights Legend. Use, duplication or disclosure by the U.S. Government is subject to restrictions as set forth in subparagraph (c) (1) (ii) of the Rights in Technical Data and Computer Software clause at DFARS 252.
Product Warranty This Agilent Technologies product has a warranty against defects in material and workmanship for a period of three years from date of shipment. During the warranty period, Agilent Technologies will, at its option, either repair or replace products that prove to be defective. For warranty service or repair, this product must be returned to a service facility designated by Agilent Technologies.
