Specifications

ManualsBrandsAnritsu ManualsAmplifierME7840A

Do not exceed the operating input power level, voltage

level,currentlevel,andsignaltypethatisappropriatefor

theinstrumentbeingused.Refer toyourinstrument’sop

eration manual for safe operating practices and device

limitations.

Electrostatic Discharge (ESD) can damage the highly

sensitive circuits in the instrument.ESD is most likely to

occur as test devices are being connected to, or discon-

nected from, the instrument’s front and rear panel ports

and connectors. You can protect the instrument and test

devicesbywearingastatic-dischargewristband.Alterna-

tively, you can ground yourself to discharge any static

charge by touching the outer chassis of the grounded in-

strument before touching the instrument’sfront and rear

panel ports and connectors. Avoid touching the test port

center conductors unless you are properly grounded and

have eliminated the possibility of static discharge.

Repair of damage that is found to be caused by electro

static discharge is not covered under warranty.

Caution

Summary of content (205 pages)

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Caution Do not exceed the operating input power level, voltage level, current level, and signal type that is appropriate for the instrument being used. Refer to your instrument’s operation manual for safe operating practices and device limitations. Electrostatic Discharge (ESD) can damage the highly sensitive circuits in the instrument. ESD is most likely to occur as test devices are being connected to, or disconnected from, the instrument’s front and rear panel ports and connectors.
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MS462XX VECTOR NETWORK MEASUREMENT SYSTEM MAINTENANCE MANUAL 490 JARVIS DRIVE · MORGAN HILL, CA 95037-2809 P/N: 10410-00205 REVISION: H PRINTED: JULY 2004 COPYRIGHT 2004 ANRITSU CO.
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WARRANTY The Anritsu product(s) listed on the title page is (are) warranted against defects in materials and workmanship for three years from the date of shipment. Anritsu's obligation covers repairing or replacing products which prove to be defective during the warranty period. Buyers shall prepay transportation charges for equipment returned to Anritsu for warranty repairs. Obligation is limited to the original purchaser. Anritsu is not liable for consequential damages.
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Safety Symbols To prevent the risk of personal injury or loss related to equipment malfunction, Anritsu Company uses the following symbols to indicate safety-related information. For your own safety, please read this information carefully BEFORE operating the equipment. Symbols Used in Manuals DANGER Indicates a very dangerous procedure that could result in serious injury or death if not performed properly.
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For Safety WARNING Always refer to the operation manual when working near locations at which the alert mark, shown on the left, is attached. If the operation, etc., is performed without heeding the advice in the operation manual, there is a risk of personal injury. In addition, the equipment performance may be reduced. Moreover, this alert mark is sometimes used with other marks and descriptions indicating other dangers.
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Table of Contents, Narrative Chapter 1—General Service Information This chapter familiarizes the user with the basic MS462XX Vector Network Measurement System. Included is information about related manuals, available models and options, preventive maintenance, recommended test equipment, replaceable assembly part numbers, and customer service contact information.
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Table of Contents Chapter 1 General Information 1-1 SCOPE OF THIS MANUAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 1-2 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 1-3 RELATED MANUALS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 1-4 MODELS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 1-5 OPTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Table of Contents (Continued) 2-4 RECEIVER MODULE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10 Down Conversion Module . . . . . . . . . . . . . . . . . . . Digital Interface . . . . . . . . . . . . . . . . . . . . . . . . Test Channel Intermediate Frequency Path . . . . . . . . . Reference Channel Intermediate Frequency Path . . . . . . Sampling of the Intermediate Frequency . . . . . . . . . . . ADC Clock Generation/ DSP Communication Port Interface 10 MHz Clock Distribution . . .
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Table of Contents (Continued) Chapter 3 Operational Performance Tests 3-1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3 3-2 CHECKING THE SERVICE LOG/SELF-TEST . . . . . . . . . . . . . . . . . . . 3-3 3-3 VERIFYING OUTPUT POWER ACCURACY . . . . . . . . . . . . . . . . . . . . 3-5 3-4 NON-RATIO PARAMETER TEST (MS462XA/C/D) . . . . . . . . . . . . . . . . . 3-7 3-5 SYSTEM DYNAMIC RANGE TEST (MS462XA/B/D) . . . . . . . . . . . . . . .
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Table of Contents (Continued) 5-6 ALC ADJUSTMENT PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . 5-8 5-7 BACK-END ATTENUATOR CALIBRATION (OPTION 4X ONLY) . . . . . . . . 5-10 5-8 NOISE SOURCE SIGNAL INTERNAL THROUGH PATH CHARACTERIZATION (OPTION 4X ONLY) . . . . . . . . . . . . . . . . . . . . 5-11 Chapter 6 Troubleshooting 6-1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3 6-2 SELF TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Table of Contents (Continued) Chapter 7 Removal and Replacement Procedures 7-1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3 7-2 FRONT PANEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4 Floppy Disk Drive Assembly LCD Assembly . . . . . . . . LCD Backlight Driver PCB . Interface PCB . . . . . . . . Backlight Fluorescent Lamp 7-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Chapter 1 General Information Table of Contents Chapter 1 General Information 1-1 SCOPE OF THIS MANUAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 1-2 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 1-3 RELATED MANUALS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 1-4 MODELS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 1-5 OPTIONS. . . . . . . . . . . . . . . . . . . . . . . . .
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Figure 1-1.
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Chapter 1 General Information 1-1 1-2 1-3 1-4 SCOPE OF THIS MANUAL This manual provides general information, performance verification, calibration, theory, and service information for the Anritsu MS462XX Vector Network Measurement System. The MS462XX Vector Network Measurement System is shown in Figure 1-1 (facing page). INTRODUCTION This chapter provides information to familiarize the user with the basic MS462XX Vector Network Measurement System.
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OPTIONS 1-5 OPTIONS GENERAL INFORMATION The following options are easily added to the MS462XX platform for increased measurement capabilities: Option Number Description Availability 2 Time Domain All Models 3A Second Internal Source4 3 GHz Source – B Models 3B Second Internal Source4 6 GHz Source – B Models 3C Second Internal Source5 3 GHz Source – C Models 3D Second Internal Source5 6 GHz Source – C Models 3E Second Internal Source7 9 Ghz Source – D Models 3F Second Internal Sourc
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GENERAL INFORMATION 1-8 SPARE PARTS LISTING SPARE PARTS LISTING The assemblies and spare parts listed in Table 1-1 through Table 1-3 are available for the MS462XX Vector Network Measurement System. Refer to Chapter 7 for removal and replacement procedures. Contact your nearest Anritsu Customer Service or Sales Center for price and availability information (Table 1-4). Table 1-1.
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SPARE PARTS LISTING GENERAL INFORMATION Table 1-2.
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GENERAL INFORMATION 1-9 ASSEMBLY EXCHANGE PROGRAM ASSEMBLY EXCHANGE PROGRAM Anritsu maintains an exchange assembly program for selected MS462XX subassemblies and RF components. If a malfunction occurs in one of these subassemblies, the defective unit can be exchanged. All exchange subassemblies or RF components are warrantied for 90 days from the date of shipment, or the balance of the original equipment warranty, whichever is longer.
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RECOMMENDED TEST EQUIPMENT Instrument Computer or Controller Critical Specifications GENERAL INFORMATION Recommended Manufacturer or Model Application Code O, P Personal Computer: Pentium class processor, Win 95 (16 MB RAM min.
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GENERAL INFORMATION Instrument RECOMMENDED TEST EQUIPMENT Critical Specifications Recommended Manufacturer or Model Application Code Power Meter: Power Range –70 to +20 dBm GPIB controllable Anritsu ML2430A Series Power Sensor: Frequency Range 10 MHz to 18 GHz Power Range –70 to +20 dBm Anritsu MA2472A Digital Multimeter Resolution: 4 ½ digits DC Accuracy: 0.1 % AC Accuracy: 0.1 % Any T Oscilloscope Bandwidth : DC to 100 MHz Tektronix Inc.
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CONVENTIONS 1-12 CONVENTIONS GENERAL INFORMATION Throughout this manual, path names may be used to represent the keystrokes for a desired action or procedure. The path name begins with a front panel key selection, followed by additional front panel or soft key selections, each separated by a forward slash (/). Front panel key names and soft keys are presented in the manual as they are on the system, that is, in initial caps or all uppercase letters as appropriate.
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GENERAL INFORMATION 1-13 COMPONENT HANDLING COMPONENT HANDLING The MS462XX series contains components that can be damaged by static electricity. The following figures illustrate the precautions that should be followed when handling static-sensitive subassemblies and components. If followed, these precautions will minimize the possibilities of staticshock damage to these items. NOTE Use of a grounded wrist strap when removing and/or replacing subassemblies or parts is strongly recommended. 1.
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COMPONENT HANDLING 7. Handle PCBs only by their edges. Do not handle by the edge connectors. GENERAL INFORMATION 8. Lift & handle solid state devices by their bodies—never by their leads. 9. Transport and store PCBs and other static sensitive devices in staticshielded containers. ADDITIONAL PRECAUTIONS Keep work spaces clean and free of any objects capable of holding or storing a static charge. Connect soldering tools to an earth ground.
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GENERAL INFORMATION 1-14 SERVICE CENTERS SERVICE CENTERS Table 1-4. Anritsu Service Centers UNITED STATES FRANCE JAPAN ANRITSU COMPANY 490 Jarvis Drive Morgan Hill, CA 95037-2809 Telephone: (408) 776-8300 1-800-ANRITSU FAX: 408-776-1744 ANRITSU S.A 9 Avenue du Quebec Zone de Courtaboeuf 91951 Les Ulis Cedex Telephone: 016-09-21-550 FAX: 016-44-61-065 ANRITSU CUSTOMER SERVICES LTD. 1800 Onna Atsugi-shi Kanagawa-Prf.
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Chapter 2 Theory of Operation Table of Contents 2-1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 2-2 SYSTEM OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 2-3 SOURCE MODULE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 Digital Interface . . . . . . . . . . . . . Main Oscillator Loops . . . . . . . . . . Offset Oscillator Loops . . . . . . . . . DDS Reference Clock . . . . . . . . . . Bounding Circuitry .
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Table of Contents (Continued) 2-5 FRONT END RF COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15 Test Port Connectors . . . . . . . . . . . . . . . . Switched Frequency Doubler Module . . . . . . . Switched Frequency Tripler Module . . . . . . . Auto-Reversing Module . . . . . . . . . . . . . . Non-Reversing Module . . . . . . . . . . . . . . . Step Attenuator . . . . . . . . . . . . . . . . . . Port Module. . . . . . . . . . . . . . . . . . . . . Port 3 Module. . . . . . . . . . . . . .
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Chapter 2 Theory of Operation 2-1 2-2 INTRODUCTION This chapter provides a brief overview of the functional assemblies and major parts that comprise a typical MS462XX Vector Network Measurement System. It also briefly describes the operation of each major assembly. SYSTEM OVERVIEW MS462XA/B Series Vector Network Measurement Systems are ratio measurement systems used to measure complex vector signal characteristics of devices and systems in the 10 MHz to 9 GHz range.
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SOURCE MODULE THEORY OF OPERATION A front panel keypad, rotary knob, and IBM compatible keyboard interface provide user interaction with the MS462XX Central Processor Module. The system is also equipped with a floppy disk drive and non-volatile internal memory for storage and retrieval of data and front panel setup information. The MS462XX implements an IEEE 488.2 GPIB interface that allows an externally connected instrument controller to control the MS462XX system in the “Remote-Only” mode.
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THEORY OF OPERATION SOURCE MODULE The internal ALC level loop allows for a leveled range of –11 dBm to +20 dBm out of the Source RF port. The Local Oscillator is not used on the optional Source module. All frequency loops are phase locked to the internal 10 MHz reference oscillator in the MS462XX. NOTE Six gigahertz instruments use a Switched Doubler module immediately following the source(s). Nine gigahertz instruments use a Switched Tripler module immediately following the source(s).
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SOURCE MODULE THEORY OF OPERATION The loop amplifier has a gain of 4; therefore, the sensitivity at the PLL IC output is very high. Thus, any noise injected at this point has noticeable affects on the output noise characteristics. DDS Reference Clock In order to generate accurate DDS frequencies, an accurate reference clock must be provided to the two DDS ICs. The 32 bits of the DDS frequency register allow the minimum output resolution of Fclk divided by 232.
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THEORY OF OPERATION Speed-Up Circuitry SOURCE MODULE In addition to the phase-lock and bounding circuitry, there is also circuitry to help speed the locking of the loop. The settling time of the main loop and its phase detector is very slow. Frequency lock detect circuitry emits pulses to help get the source main VCO locked on frequency quicker. Once on frequency, the speed-up circuit’s contribution drops out and the normal phase lock circuitry locks up the loop the rest of the way.
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SOURCE MODULE ALC Circuitry THEORY OF OPERATION The source side differs from the LO side primarily in its ability to have controllable output power. The feedback from a level detector controls the level of the source output. The level of the signal can be controlled over a 20 dB range. In the ALC circuitry, a DAC is set to a calibrated value for a desired power level. The ALC loop then adjusts the level of the source output until the detector output matches the reference voltage.
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THEORY OF OPERATION SOURCE MODULE To make accurate measurements, the IF must be settled before the Digital Signal Processing (DSP) is triggered. When operating in common offset mode, the IF settles faster. In fact, even though the offset VCO (and therefore the main VCOs) may still be slewing in phase, the IF itself may already be settled because the Source and LO are tracking. The two main VCOs are able to track the offset VCO settling because of their higher bandwidths.
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RECEIVER MODULE 2-4 RECEIVER MODULE THEORY OF OPERATION The Receiver module is made up of the RF components that are used to configure the system for the various options. This encompases the frequency translation module, which produces the 125 kHz Intermediate Frequency, the Test and Reference channel Intermediate Frequency paths, the system 10 MHz time base, and the circuitry for the control of the RF components.
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THEORY OF OPERATION Test Channel Intermediate Frequency Path RECEIVER MODULE The purpose of the Test Channel I.F. circuitry is to amplify, filter, and sample the test channel signal after it has been down converted to a fixed intermediate frequency. Sampling is performed by an18-bit ADC at the fixed sampling rate of 156.25 samples/second. Amplification is necessary to optimally position the test signal within the input signal range of the ADC.
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RECEIVER MODULE THEORY OF OPERATION aliased signal. Amplification and bandpass anti-alias filtering on the 453.125 kHz signal occurs on the options board. The other signal that comes from the options board is a DC signal, also switched in on J20, that results from noise figure measurements. This DC signal is sampled and subsequently averaged in the DSP. Reference Channel Intermediate Frequency Path Similar to the Test Channel, the Reference Channel I.F.
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THEORY OF OPERATION Sampling of the Intermediate Frequency RECEIVER MODULE At the end of the test and reference Intermediate Frequency chains is an 18 bit ADC converter. Although this converter produces 18 bits on its output, its effective number of bits is approximately 15, meaning that it has resolution up to 15 ideal bits. The ADC is a sampling converter, so it samples then holds the input signal while the conversion takes place, thus eliminating the need for an external sample and hold chip.
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RECEIVER MODULE THEORY OF OPERATION ADC Clock Generation/ DSP Communication Port Interface The ADC requires specific clock pulses to convert the signal, and it’s very sensitive to these pulses. To generate the clock signals required for correct operation, a state machine was designed in the PLD. The PLD state machine takes the system 10 MHz clock as an input, and generates the ADC clocks as outputs. The ADC requires a start conversion pulse, the CCMD signal at the sampling frequency (156.
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THEORY OF OPERATION 2-5 FRONT END RF COMPONENTS Test Port Connectors FRONT END RF COMPONENTS The receiver demodulates the signals for processing by the CPU. Various RF components are used to configure the different options. Five configurations of the RF connectors are offered: q q q q q Switched Frequency Doubler Module Test Port Connector N-Male (B45261) Test Port Connector N-Female (B45259) Test Port Connector GPC-7 (B47086) Test Port Connector 3.5 mm Female (B47087) Test Port Connector 3.
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FRONT END RF COMPONENTS THEORY OF OPERATION The forward or reverse stimulus signals are sampled by the reference signal sampling couplers and are then sent to a SP3T switch. In the MS462XB, the Port 3 reference signal that is input via J5 is also sent to this switch. In the MS462XD, the Port 3 or Port 4 reference signal from the second ARM is also sent to this switch. This SP3T switch selects the proper Port reference signal to be output via J3, depending on sweep direction and test port used.
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THEORY OF OPERATION Receiver Module Configurations, MS462XA FRONT END RF COMPONENTS The front end consists of the following items: q q q q q q Non-Reversing Module Port 1 Module 20 dB Fixed Attenuator Port 1 Step Attenuator (Option 7) Switched Doubler Module (6 GHz unit only) Switched Tripler Module (9 GHz unit only) The 10 MHz to 3 GHz signal from the Source Module is routed to the Non-Reversing Module.
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FRONT END RF COMPONENTS THEORY OF OPERATION Two couplers on these two paths provide samples of the Forward or Reverse signals that feed the Reference input of the Down Conversion Module. The stimulus signal is then output to the DUT via the Port 1 and Port 2 Modules mounted directly to the Port 1 and Port 2 front panel connectors. Both Port Modules have integrated bias tees that accept user supplied DC bias signals for Port 1 and Port 2 from the rear panel input connectors.
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THEORY OF OPERATION Receiver Module Configurations, MS462XD FRONT END RF COMPONENTS The front end consists of the following items: q q q q q q Auto-Reversing Modules (two each) Port Modules (four each) Port 1 Step Attenuator Source 1 Switched Doubler Module (6 GHz units only) or Source 1 Switched Tripler Module (9 GHz units only) Source 2 Switched Doubler Module (6 GHz units only) or Source 2 Switched Tripler Module (9 GHz units only) High Isolation Switch Module The 10 MHz to 3 GHz signal from the Sou
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FRONT END RF COMPONENTS THEORY OF OPERATION In the Auto-Reversing Module 2, a coupler provides a signal path for the built-in level detector that provides a DC signal for the ALC circuits located in the Source 2 Module. Then the source signal is switched between two paths and routed to the front panel Port 3 and Port 4 connectors, respectively.
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THEORY OF OPERATION OPTION MODULES In the Port 1 source path, the Port 1 Switch Module allows the injection of the Noise signal to the DUT via the Port 1 connector from an external noise source when operating in the Noise Figure Measurement mode. The Port 2 Switch Module switches the Noise Figure test signal via a Low Noise Pre-Amplifier Assembly so that the signal is at the proper level prior to being sent to the Down Conversion Module.
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OPTION MODULES THEORY OF OPERATION Current draw is minimal on the board (<100 mA at +5 volts, a few hundred mA on ±12 volts) so three port regulators are used. A low dropout regulator is used for the +5V supply. The digital section employs two addresses only. Latches provide access to the 16-bit data bus for address 0, which controls everything except the analog monitor. Another latch, address 1, provides access to the data bus for the analog monitor.
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THEORY OF OPERATION Frequency Translating Group Delay Receiver OPTION MODULES The main group delay receiver starts with a 10.7 MHz bandpass filter, which is the approximate carrier frequency for this measurement (output of down converter should be a 10.7 MHz carrier with 453.125 kHz FM at a modulation index of 0.1 to 0.3). The filter is quite broad because of the large modulation bandwidth and the possibility of changing the carrier frequency slightly based on calibration.
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OPTION MODULES THEORY OF OPERATION After the filter-amplifier chain, the signal enters a 0 to 30 dB switched attenuator for gain ranging prior to detection. A comparator tree is used to supply the control voltages required by this attenuator. While the attenuator appears to have quite repeatable and stable attenuation values, the absolute values from attenuator to attenuator vary substantially. This is not surprising based on the manufacturer’s accuracy specifications of approximately ± 0.
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THEORY OF OPERATION 2-7 CENTRAL PROCESSOR MODULE CENTRAL PROCESSOR MODULE The Central Processor Module (Figure 2-1, following page) contains most of the digital functionality of the MS462XX, and consists of three major sections, each of which contains its own processor: q q q Main CPU DSP Core Graphics Core The Main CPU section is a MC68040 with a primary cache and includes a local system memory (16 MB Fast Page Mode DRAM upgradable to 64 MB, 4 MB Battery Backed SRAM, 10 MB Flash, 512 KB Boot EPROM, 1
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RECEIVER MODULE BLOCK DIAGRAMS TO CONNECTOR BOARD (D43017) 7 THEORY OF OPERATION MAIN CPU: 1 - MC68040 CPU 2 - DRAM CONTROLLER 3 - 16 MB LOCAL DRAM 4 - 48 MB EXP. DRAM 5 - 4 MB NON-VOL SRAM 6 - 3V LITHIUM BATTERY 7 - CS PLD 8 - SCSI CONTROLER (OPT.
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THEORY OF OPERATION RECEIVER MODULE Figure 2-2.
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RECEIVER MODULE THEORY OF OPERATION Figure 2-3.
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THEORY OF OPERATION RECEIVER MODULE Figure 2-4.
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RECEIVER MODULE THEORY OF OPERATION Figure 2-5.
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THEORY OF OPERATION RECEIVER MODULE Figure 2-6.
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RECEIVER MODULE THEORY OF OPERATION Figure 2-7.
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THEORY OF OPERATION RECEIVER MODULE Figure 2-8.
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RECEIVER MODULE Figure 2-9. Model MS4623A/MS4624A, Transmission/Reflection, Step Attenuator, Option 7 THEORY OF OPERATION * Refer to Figure 2-22 (page 2-47) for a functional block diagram of the Source Tripler and 9 GHz Down Conversion Module used on the model MS4624A.
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THEORY OF OPERATION Figure 2-10. Model MS4623A/MS4624A, Transmission/Reflection MS462XX MM RECEIVER MODULE * Refer to Figure 2-22 (page 2-47) for a functional block diagram of the Source Tripler and 9 GHz Down Conversion Module used on the model MS4624A.
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RECEIVER MODULE Figure 2-11. Model MS4623B/MS4624B, Auto-Reversing THEORY OF OPERATION * Refer to Figure 2-22 (page 2-47) for a functional block diagram of the Source Tripler and 9 GHz Down Conversion Module used on the model MS4624B.
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THEORY OF OPERATION Figure 2-12. Model MS4623B/MS4624B, Auto-Reversing, Option 3B, 2nd Internal Source and 3rd Test Port MS462XX MM RECEIVER MODULE * Refer to Figure 2-22 (page 2-47) for a functional block diagram of the Source Tripler and 9 GHz Down Conversion Module used on the model MS4624B.
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RECEIVER MODULE Figure 2-13. Model MS4623B/MS4624B, Auto-Reversing, Option 4, Noise Figure THEORY OF OPERATION * Refer to Figure 2-22 (page 2-47) for a functional block diagram of the Source Tripler and 9 GHz Down Conversion Module used on the model MS4624B.
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THEORY OF OPERATION Figure 2-14. Model MS4623B/MS4624B, Auto-Reversing, Option 6, 3rd Test Port MS462XX MM RECEIVER MODULE * Refer to Figure 2-22 (page 2-47) for a functional block diagram of the Source Tripler and 9 GHz Down Conversion Module used on the model MS4624B.
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RECEIVER MODULE Figure 2-15. Model MS4623B/MS4624B, Auto -Reversing, Options 3B and 4 THEORY OF OPERATION * Refer to Figure 2-22 (page 2-47) for a functional block diagram of the Source Tripler and 9 GHz Down Conversion Module used on the model MS4624B.
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THEORY OF OPERATION RECEIVER MODULE Figure 2-16.
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RECEIVER MODULE THEORY OF OPERATION Figure 2-17.
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THEORY OF OPERATION Figure 2-18. Model MS4623C/MS4624C, Direct Access Receiver MS462XX MM RECEIVER MODULE * Refer to Figure 2-22 (page 2-47) for a functional block diagram of the Source Tripler and 9 GHz Down Conversion Module used on the model MS4624C.
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RECEIVER MODULE Figure 2-19. Model MS4623C/MS4624C, Option 3 Direct Access Receiver THEORY OF OPERATION * Refer to Figure 2-22 (page 2-47) for a functional block diagram of the Source Tripler and 9 GHz Down Conversion Module used on the model MS4624C.
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THEORY OF OPERATION RECEIVER MODULE Figure 2-20.
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RECEIVER MODULE Figure 2-21. Model MS4623D/MS4624D 4-Port Receiver THEORY OF OPERATION * Refer to Figure 2-22 (page 2-47) for a functional block diagram of the Source Tripler and 9 GHz Down Conversion Module used on the model MS4624D.
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THEORY OF OPERATION RECEIVER MODULE BLOCK DIAGRAMS Figure 2-22.
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Chapter 3 Operational Performance Tests Table of Contents 3-1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3 3-2 CHECKING THE SERVICE LOG/SELF-TEST . . . . . . . . . . . . . . . . . . . 3-3 3-3 VERIFYING OUTPUT POWER ACCURACY . . . . . . . . . . . . . . . . . . . . 3-5 3-4 NON-RATIO PARAMETER TEST (MS462XA/C/D) . . . . . . . . . . . . . . . . . 3-7 3-5 SYSTEM DYNAMIC RANGE TEST (MS462XA/B/D) . . . . . . . . . . . . . . .
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Chapter 3 Operational Performance Tests 3-1 INTRODUCTION The tests in this chapter provide a means of partially testing the MS462XX system for proper operation. These tests should be performed in their entirety at least once annually. For best results, the tests should be performed in the sequence presented. NOTE The procedures in this chapter, along with the Verification Tests in Chapter 4, will fully test the operational status of the MS462XX.
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CHECKING THE SERVICE LOG/SELF-TEST 2. CAUTION The CLEAR LOG soft key selection will immediately and permanently clear all the error message entries from the service log. (However, it will not clear the header information.) PERFORMANCE TESTS Select: DIAGNOSTICS SERVICE LOG The MS462XX will now display the contents of the service log. The display consists of a header and an error listing. The header contains a variety of system service information.
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PERFORMANCE TESTS 3-3 VERIFYING OUTPUT POWER ACCURACY Equipment Required: VERIFYING OUTPUT POWER ACCURACY These procedures use the Power ALC Verification built-in function of the MS462XX Basic Measurement Software. The Standard Conditions and Special Precautions described in Section 4-2 should be observed when performing these procedures.
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VERIFYING OUTPUT POWER ACCURACY 7. Verify that the instrument passes this test. 8. If the instrument is a MS462XB/C with Option 3 installed or a MS462XD, press the SELECT SOURCE soft key to select source 2. 9. Connect the power sensor to Port 3 and select the START VERIFICATION soft key. NOTE The worst case test result will be displayed on the screen when the instrument fails this test only. The failed test result is also recorded in the Service Log. PERFORMANCE TESTS 10.
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PERFORMANCE TESTS 3-4 NON-RATIO PARAMETER TEST (MS462XA/C/D) NON-RATIO PARAMETER TEST (MS462XA/C/D) One of the most useful tests for troubleshooting RF component problems in the Receiver Module is the non-ratio parameter test. This test verifies that each individual receiver channel operates properly as well as provides clues to where a problem is located. NOTE The non-ratio parameter test is not available for the MS462XC. Test Setup: Test Procedure: Connect the test equipment as described below.
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NON-RATIO PARAMETER TEST (MS462XA/C/D) 6. PERFORMANCE TESTS Change the user defined ratio by selecting: CHANGE RATIO MORE b2 (Tb) as the numerator 1 (UNITY) as the denominator 7. Ensure thta the minimum level of b2/1 is above the level shown in Table 3-1. Table 3-1.
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PERFORMANCE TESTS NON-RATIO PARAMETER TEST (MS462XA/C/D) NOTE If desired, use the Readout Markers function (Marker key and Readout Marker soft key) to obtain precise frequency and amplitude values. Figure 3-2. Non-Ratioed Parameters Waveforms 8. Measure all other non-ratio parameters shown in Table 3-1 by selecting the S-parameters S12, S33 or S44 and setting up the user defined ratios as described in Steps 2 through 6. Also, install a short on Ports 3 and 4 as indicated in Table 3-1.
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SYSTEM DYNAMIC RANGE TEST (MS462XA/B/D) 3-5 SYSTEM DYNAMIC RANGE TEST (MS462XA/B/D) Equipment Required: This section verifies that the VNMS has a dynamic range consistent with factory specifications. A full 12-term calibration (with isolation) must be performed. The following equipment is required: q q Procedure: PERFORMANCE TESTS Anritsu Calibration kit intended for use with the instrument under test RF cables or Anritsu throughlines suitable for use with the instrument 1.
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PERFORMANCE TESTS SYSTEM DYNAMIC RANGE TEST (MS462XA/B/D) 9. Ensure the correct test port connector types are selected. If not, select the port connection displayed and choose the correct type from the list. 10. Select START CAL and continue to use the default settings for the calibration. 11. Before measuring the isolation devices (50 W terminations), press the Avg key. 12. Select DATA AVERAGE and enter 10 (followed by the X1 key). 13. Select: I.F. BANDWIDTH I.F. BW 10 Hz 14.
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SYSTEM DYNAMIC RANGE TEST (MS462XA/B/D) 20. PERFORMANCE TESTS Press the Display key and select: GRAPH TYPE LOG MAGNITUDE RETURN SCALE RESOLUTION 21. Enter 10 and press the X1 key. 22. Select REFERENCE VALUE and enter -70, then press the X1 key. Reference line 7 and select RETURN. 23. Select: DISPLAY MODE SINGLE CHANNEL 24. Press the Meas key and select: S21, TRANS b2/a1 25. Press the Marker key and select: DISPLAY MARKERS ON READOUT MARKERS 26.
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PERFORMANCE TESTS SYSTEM DYNAMIC RANGE TEST (MS462XA/B/D) 31. Set up the calibration using all default parameters. 32. Before measuring the Isolation Devices, press the Avg key and select 10 averages and 10 Hz I.F. BW (as in Steps 12 and 13). Measure the Isolation Devices. 33. Finish the calibration and install terminations to Ports 1 and 3. 34. Press the Meas key and select S13. 35. Press the Avg key, ensure that averaging is ON and select: AVERAGES=10 IF BANDWIDTH=10 Hz. 36.
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SYSTEM DYNAMIC RANGE TEST (MS462XC) 3-6 PERFORMANCE TESTS This test verifies the System Dynamic Range of the test channels of the receiver. SYSTEM DYNAMIC RANGE TEST (MS462XC) Test Setup: Set up the equipment as shown below and allow the instruments to warm-up for at least one hour. MS46XC Rear Panel Serial Port VGA Ethernet SCSI-2 IEEE 488.2 GPIB Ext I/O LPT Line Printer Dedicated GPIB WARNING NO OPERATOR SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL.
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PERFORMANCE TESTS SYSTEM DYNAMIC RANGE TEST (MS462XC) 8. Press the BEGIN CAL soft key to start calibration. 9. After the Flat Test Port Power Cal is completed, disconnect the power sensor from the unterminated end of the 43KC-10 attenuator and connect the attenuator with the coaxial cable to b1 input on the rear panel of MS462XC. 10. Press the Avg key and select: SELECT I.F. BANDWIDTH I.F. BW 10 Hz 11. Press the Meas key and select: USER DEFINED CHANGE RATIO b1 (Ta) 1 (UNITY) 12.
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COMPRESSION LEVEL TEST (MS462XC) 3-7 PERFORMANCE TESTS This test verifies the compression magnitude levels of the MS462XC Vector Network Measurement System receiver. COMPRESSION LEVEL TEST (MS462XC) Test Setup: Set up the equipment as shown below and allow the instruments to warm-up for at least one hour. MS46XC Rear Panel Serial Port Ethernet VGA Anritsu Power Meter SCSI-2 IEEE 488.
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PERFORMANCE TESTS COMPRESSION LEVEL TEST (MS462XC) 8. Select the NEXT FREQUENCY soft key, then enter the following frequencies: q NOTE Select the INSERT NEXT FREQUENCY soft key to store the entered frequency value to memory. 9. q MS4622C—1 GHz, 2 GHz, and 3 GHz MS4623C—1 GHz, 2 GHz, 4 GHz, and 6 GHz q MS4624C—1 GHz, 2 GHz, 4 GHz, 6 GHz and 9 GHz Select: RETURN RETURN to exit this setup menu. 10. Select the C.W. MODE soft key to turn C.W. mode ON. 11. Change the C.W. frequency to 50 MHz. 12.
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COMPRESSION LEVEL TEST (MS462XC) PERFORMANCE TESTS 25. Record the SOURCE 1 POWER setting in the corresponding space in Table 3-4 (page 3-23) for MS4622C, Table 3-5 (page 3-24) for MS4623C, or Table 3-6 (page 3-25) for MS4624C. 26. Adjust SOURCE 1 POWER so that the power meter reads –20 dBm ± 0.01 dB. 27. Record the SOURCE 1 POWER setting to the corresponding space in Table 3-4 for MS4622C, Table 3-5 for MS4623C, or Table 3-6 for MS4624C. 28.
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PERFORMANCE TESTS (MS462XC) 3-8 RECEIVER MAGNITUDE DISPLAY LINEARITY TEST (MS462XC) RECEIVER MAGNITUDE DISPLAY LINEARITY TEST This test verifies the magnitude linearity of the MS462XC receiver. Test Setup: Set up the equipment as directed in the procedure below and allow the instruments to warm-up for at least one hour. Procedure: 1. Press the Default key and then 0 key to reset the instrument. 2. Press the Ch 3 key and then Display key. 3.
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RECEIVER MAGNITUDE DISPLAY LINEARITY TEST (MS462XC) TESTS 15. PERFORMANCE Select: MARKER READOUT 16. Use the soft key to turn on Marker 1. Then use the numeric data entry key to change POINT to 25. 17. Press the Marker key again. 18. Select the SCREEN DISPLAY soft key to ON. 19. Zero and calibrate the power sensor. 20. Set the power sensor CAL FACTOR for the frequency being measured. 21.
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PERFORMANCE TESTS (MS462XC) RECEIVER MAGNITUDE DISPLAY LINEARITY TEST 24. Insert a BNC female to BNC female adapter between the two BNC male ports, as shown in Figure 3-6. MS46XC Rear Panel Serial Port Ethernet VGA SCSI-2 IEEE 488.2 GPIB Ext I/O LPT Line Printer Dedicated GPIB Ext Analog Output Ext Trigger 47-440 Hz 85-264VAC REPLACE FUSE ONLY WITH SAME TYPE AND RATING WARNING NO OPERATOR SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL.
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RECEIVER MAGNITUDE DISPLAY LINEARITY TEST (MS462XC) TESTS 28. PERFORMANCE Remove the BNC female to BNC female adapter and install the step attenuator in its place, as shown in Figure 3-7. Then set the attenuation to 10 dB. MS46XC Rear Panel Serial Port Ethernet VGA SCSI-2 IEEE 488.2 GPIB Ext I/O LPT Line Printer Dedicated GPIB Ext Analog Output Ext Trigger 47-440 Hz 85-264VAC REPLACE FUSE ONLY WITH SAME TYPE AND RATING WARNING NO OPERATOR SERVICEABLE PARTS INSIDE.
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PERFORMANCE TESTS (MS462XC) RECEIVER MAGNITUDE DISPLAY LINEARITY TEST Table 3-3. Attenuator Write-In Values Attenuator Setting (dB) Attenuator Calibrator Value Marker 1 Readout Value of b1* D of Atten Cal Value and Marker 1 Readout Value of b1 Marker 1 Readout Value of b2* D of Atten Cal Value and Marker 1 Readout Value of b2 D Value Specification (dB) 10 £0.35 20 £0.35 30 £0.35 40 £0.35 50 £0.35 * Absolute value of Marker 1 Readout. Table 3-4. MS4622C Source 1 Power Write-In Values C.
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RECEIVER MAGNITUDE DISPLAY LINEARITY TEST (MS462XC) TESTS PERFORMANCE Table 3-5. MS4623C Source 1 Power Write-In Values C.W. Freq (MHz) Source 1 Power Setting -10 dBm -20 dBm Marker 1 Readout Value 10 dB – Marker 1 Readout Specification b1 input 50 1000 2000 4000 6000 £0.1 dB £0.1 dB £0.1 dB £0.1 dB £0.1 dB b2 input 50 1000 2000 4000 6000 £0.1 dB £0.1 dB £0.1 dB £0.1 dB £0.1 dB a1 input 50 1000 2000 4000 6000 £0.1 dB £0.1 dB £0.1 dB £0.1 dB £0.1 dB a2 input 50 1000 2000 4000 6000 3-24 £0.
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PERFORMANCE TESTS (MS462XC) RECEIVER MAGNITUDE DISPLAY LINEARITY TEST Table 3-6. MS4624C Source 1 Power Write-In Values C.W. Freq (MHz) Source 1 Power Setting -10 dBm -20 dBm Marker 1 Readout Value 10 dB – Marker 1 Readout Specification b1 input 50 1000 2000 4000 6000 9000 £0.1 dB £0.1 dB £0.1 dB £0.1 dB £0.1 dB £0.1 dB b2 input 50 1000 2000 4000 6000 9000 £0.1 dB £0.1 dB £0.1 dB £0.1 dB £0.1 dB £0.1 dB a1 input 50 1000 2000 4000 6000 9000 £0.1 dB £0.1 dB £0.1 dB £0.1 dB £0.1 dB £0.
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NOISE FIGURE MEASUREMENT CAPABILITY (OPTION 4) PERFORMANCE TESTS 3-9 NOISE FIGURE MEASUREMENT CAPABILITY (OPTION 4) This procedure is intended to verify the functionality of the noise figure measurement hardware and the validity of the internal extension table file stored on hard disk (SRAM disk). Perform this procedure only if the instrument has Option 4X installed. This Performance Test procedure consists of three steps.
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PERFORMANCE TESTS NOISE FIGURE MEASUREMENT CAPABILITY (OPTION 4) 1. Press the Default key, then the 0 key to reset the instrument. 2. Press the Appl key. 3. Select: CHANGE APPLICATION SETUP MEASUREMENT TYPE/NOISE FIGURE 4. Load the Noise Source ENR file as follows: 5. Select: NOTE If noise source ENR table file is stored on a floppy disk, select FROM FLOPPY DISK/VENDOR ENR TABLE instead.
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NOISE FIGURE MEASUREMENT CAPABILITY (OPTION 4) PERFORMANCE TESTS 5. Press the Config key. 6. Select: DATA POINTS/51 MAX PTS 7. Connect the 15 dB ENR Noise Source to Port 2. 8. Verify that the measured Noise Figure is within the range specified in Table 3-8. Table 3-8. Noise Figure Specifications 9. 10. Model Lower Limit (dB) Upper Limit (dB) MS4622B 50 MHz to 3 GHz 1.75 7.00 MS4623B 50 MHz to 3 GHz 3 GHz to 6 GHz 1.75 1.75 7.00 8.75 MS4624B 50 MHz to 3 GHz 3 GHz to 6 GHz 1.75 1.75 7.
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PERFORMANCE TESTS NOISE FIGURE MEASUREMENT CAPABILITY (OPTION 4) 14. Connect a 3670 Series throughline between Port 1 and Port 2. Verify that there is no glitch displayed on the LCD display (see below). Figure 3-10. Noise Figure Trace Display 15. Press the Display key. 16. Select: TRACE MEMORY VIEW DATA (/) MEMORY 17. Set the Reference Scale to 0 dB with a Resolution of 0.5 dB. Verify that the trace is within a 1 dB window (see below). Figure 3-9. Noise Figure Trace Display 18.
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NOISE FIGURE MEASUREMENT CONFIDENCE CHECK 3-10 NOISE FIGURE MEASUREMENT CONFIDENCE CHECK This test checks the Y-factor dynamic range of the instrument. Equipment Required: q q q q q q q Preliminary Setup: NOTE If noise source ENR table file is stored on a floppy disk, select FROM FLOPPY DISK/VENDOR ENR TABLE instead. Refer to Section 7-6 of the MS462XX Scorpion Measurement Guide (P/N 10410-00213) for instructions on how to create a noise source ENR table file.
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PERFORMANCE TESTS NOISE FIGURE MEASUREMENT CONFIDENCE CHECK 6. Select: FROM HARD DISK/INTERNAL ENR EXTENSION TABLE CAUTION It is very important to load these ENR table files into the instrument. The data included in these files is used by the instrument to perform noise Figure measurements. Test Procedure: Press the Appl key. 1. Select: CHANGE APPLICATION SETUP MEASUREMENT TYPE/TRANSMISSION AND REFLECTION 2. Install the cables and adapters as shown in Figure 3-11.
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NOISE FIGURE MEASUREMENT CONFIDENCE CHECK 4.
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PERFORMANCE TESTS NOISE FIGURE MEASUREMENT CONFIDENCE CHECK 14. Use the rotary knob to enter SGAIN as the filename. Use the rotary knob to highlight DONE. Press the ENTER key to save the data. This is the gain data of the Amplifier. 15. Remove the Amplifier and throughlines from the instrument. 16. Press the Appl key. 17. Select: DUT BANDWIDTH/WIDE NOISE SETUP NOISE SOURCE/EXTERNAL 18. Connect the Noise Source to Port 2. Use adapters as needed. 19. Press the Cal key. 20.
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NOISE FIGURE MEASUREMENT CONFIDENCE CHECK PERFORMANCE TESTS 23. Verify that the measured Noise Figure of the Amplifier is between 4.5 dB and 6.5 dB. 24. Press the Appl key. 25. Select: DISPLAY SELECTION INSERTION GAIN 26. Allow two sweeps to complete. This is the insertion gain data of the Amplifier. Press the DISPLAY key, then select: TRACE MEMORY DISK OPERATIONS RECALL MEMORY FROM HARD DISK Press the soft key next to SGAIN.NRM to recall the file. 27. Select: RETURN DATA AND MEMORY 3-34 28.
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PERFORMANCE TESTS FREQUENCY TRANSLATING GROUP DELAY (OPTION 5) 3-11 FREQUENCY TRANSLATING GROUP DELAY (OPTION 5) Procedure: This procedure is intended to verify the functionality of the Frequency Translating Group Delay measurement hardware. Perform this procedure only if the instrument has Option 5 installed. Allow the instrument to warm up for at least 60 minutes. 1. Press the Default key, then the 0 key to reset the instrument to a factory preset state. 2. Press the Appl key. 3.
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37SF50 PHASE HARMONIC STANDARDS OPERATIONAL CHECK PERFORMANCE TESTS 16. Verify that the trace is within ± 3 ns. Refer to Figure 3-13. Figure 3-13. Frequency Translating Group Delay 17. 3-12 37SF50 PHASE HARMONIC STANDARDS OPERATIONAL CHECK Input and Output Return Loss Check Equipment Required: If the test fails, proceed to Chapter 6—Troubleshooting. The 37SF50 Phase Harmonic Standard can be checked using the following procedures.
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PERFORMANCE TESTS 37SF50 PHASE HARMONIC STANDARDS OPERATIONAL CHECK Procedure: 1. Install the cables and adapters as shown in Figure 3-14. NOTE When measuring the throughline, replace the 33SSF50 insertable with a 3 3 S F S F 5 0 insertable. After the throughline is measured, replace the 33SFSF50 insertable with the 33SSF50 insertable. Use adapters to convert these test ports to 3.
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37SF50 PHASE HARMONIC STANDARDS OPERATIONAL CHECK PERFORMANCE TESTS 7. Press the Display key, then select: DISPLAY MODE SINGLE CHANNEL 8. Press the Ch 1 key and select: DISPLAY GRAPH TYPE LOG MAGNITUDE 9. Install the 37SF50 Phase Harmonic Standard between Port 1 and Port 2. Measure the input return loss of the Phase Harmonic Standard. Specifications are shown below. Frequency range 10.
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PERFORMANCE TESTS 3-13 HARMONIC OUTPUT CHECK Equipment Required: HARMONIC OUTPUT CHECK This procedure checks the harmonic output.
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Chapter 4 System Performance Verification Table of Contents 4-1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3 4-2 CALIBRATION AND MEASUREMENT CONDITIONS . . . . . . . . . . . . . . 4-4 Standard Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4 Special Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4 4-3 PERFORMANCE VERIFICATION FOR THE MS462XA/B/D MODELS . . . . . . 4-5 2300-482 Software Requirements . .
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Chapter 4 System Performance Verification 4-1 INTRODUCTION This chapter provides specific procedures to be used to verify that the MS462XX is making accurate S-parameter measurements. You should perform these verification procedures at least once annually. It is suggested that the tests in the preceding chapter (Operational Performance Tests) be performed prior to performing the tests described in this chapter.
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CALIBRATION AND MEASUREMENT 4-2 CALIBRATION AND MEASUREMENT CONDITIONS PERFORMANCE VERIFICATION The surrounding environmental conditions and the stability and condition of the test port connectors, throughline, and calibration kit determine system measurement integrity to a large extent. These are all user controlled conditions, and as such, should be evaluated periodically for impact on system performance.
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PERFORMANCE VERIFICATION 4-3 PERFORMANCE VERIFICATION FOR THE MS462XA/B/D MODELS 2300-482 Software Requirements FOR THE MS462XA/B/D MODELS Verification of these instruments is accomplished by use of Anritsu software part number 2300-482. This software, along with an Anritsu Calibration and Verification Kits, will verify that the VNMS is capable of making accurate S parameter measurements to within the uncertainty guidelines shown in section 4-5.
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FOR THE MS462XA/B/D MODELS 2300-482 Verification Software Overview PERFORMANCE VERIFICATION The 2300-482 verification software package is included with the 366X verification kit and it is also available separately. Complete setup and operating instructions are packaged with the software in a software user guide in Acrobat pdf format. This software supports all 2, 3, and 4 Port VNMS instruments (A, B, and D models) operating up to 9 GHz.
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PERFORMANCE VERIFICATION 4-4 VNMS TRACEABILITY VNMS TRACEABILITY According to the International Vocabulary of Basic and General Terms in Metrology (VIM), BIPM, IEC, IFCC, ISO, IUPAC, IUPAP, OIML, 2nd ed., 1993, definition 6.10, traceability is defined as the property of the result of a measurement or the value of a standard that can be related to stated references through an unbroken chain of comparisons all having stated uncertainties. The stated references are stated reference standards.
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VNMS TRACEABILITY PERFORMANCE VERIFICATION In the chart below, a widely used traceability path for making scattering parameter measurements is presented. The basic elements in this chart include a calibration kit, a VNMS, and a verification kit for each user. The calibration kit is characterized and traceable mainly through impedance standards, for example airlines and proper circuit modeling. The vertical path is a process that is used by most of the manufacturers and primary standards laboratories.
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Chapter 5 Adjustments Table of Contents 5-1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3 5-2 RECOMMENDED TEST EQUIPMENT . . . . . . . . . . . . . . . . . . . . . . . 5-4 5-3 TEST CONDITIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4 5-4 PRE-TEST SETUP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4 5-5 10 MHz CALIBRATION PROCEDURE . . . . . . . . . . . . . . . . . . . . . . .
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Chapter 5 Adjustments 5-1 INTRODUCTION This chapter provides calibration procedures to be performed as specified below: 1. Perform the 10 MHz calibration procedure if: q q The CPU module is replaced and the instrument’s Basic Measurement Software is version 1.14 or later The receiver PCB is replaced NOTE The 10 MHz calibration capability is not available in Basic Measurement Software versions earlier than 1.14. The Basic Measurement Software must be updated to version 1.
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RECOMMENDED TEST EQUIPMENT 5-2 RECOMMENDED TEST EQUIPMENT The following test equipment is required to perform the procedures in this chapter: q q Anritsu ML2430A Series Power Meter Anritsu MA2472A Power Sensor Anritsu MF2412B Frequency Counter or Equivalent q Anritsu 3670 Series Throughline q 5-3 TEST CONDITIONS ADJUSTMENTS The equipment must be operated under controlled conditions of temperature and humidity in order to meet its specified precision and stability.
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ADJUSTMENTS 10 MHz CALIBRATION PROCEDURE Dedicated GPIB GPIB Figure 5-1. Automatic 10 MHz Calibration Setup Automatic Calibration Procedure: 1. Connect a GPIB cable (Anritsu 2100-2) between the EIP frequency counter GPIB connector and the MS462XX dedicated GPIB connector, as shown in Figure 5-1.
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10 MHz CALIBRATION PROCEDURE ADJUSTMENTS Figure 5-2. Automatic 10 MHz Calibration Anritsu AnritsuMF2412B MF241XB Frequency Counter Input 1 Figure 5-3. Manual 10 MHz Calibration Setup Manual Calibration Procedure: 1. On the MS462XX, press the UTILITY front panel key. 2.
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ADJUSTMENTS 10 MHz CALIBRATION PROCEDURE 3. Connect a coaxial RF cable between the Input connector of the frequency counter and Port 1 connector of the MS462XX, as shown in Figure 5-3 (previous page). NOTE If the frequency counter internal 10 MHz reference time base has not been calibrated, apply a high stability 10 MHz reference source to the frequency counter instead of using the internal 10 MHz reference. 4.
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ALC ADJUSTMENT PROCEDURE 5-6 ALC ADJUSTMENT PROCEDURE ADJUSTMENTS This procedure guides the operator through the Automatic Level Control (ALC) calibration routine for the MS462XX Vector Network Measurement System. The ALC calibration is used to restore the calibration of the MS462XX signal sources. Use this procedure after various signal source related assemblies have been removed or replaced due to troubleshooting or repair activities.
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ADJUSTMENTS ALC ADJUSTMENT PROCEDURE 6. Press the menu soft key to select the source to be calibrated: Select Source 1/2 7. Connect the power sensor to the selected port (Port 1 for Source 1, Port 3 for Source 2). 8. Select: START CAL 9. After the ALC calibrations are complete, back up the calibrations by selecting SAVE TO HARD DISK. If the calibration fails: q Verify that the power meter and sensor are functioning correctly, the GPIB cables are in good condition, and all connections are secure.
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BACK-END ATTENUATOR 5-7 BACK-END ATTENUATOR CALIBRATION (OPTION 4X ONLY) ADJUSTMENTS The Back-end Attenuator calibration is used to characterize the attenuator in the Option Module for use in insertion gain calculations. Perform this procedure after the Option Module assembly has been removed or replaced due to troubleshooting or repair activities. This procedure uses the MS462XX internal diagnostics and calibration menus. Procedure: 1.
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ADJUSTMENTS 5-8 NOISE SOURCE SIGNAL INTERNAL THROUGH PATH CHARACTERIZATION (OPTION 4X ONLY) Equipment Required: NOISE SOURCE This procedure provides steps for characterizing the Noise Source Signal Internal Through Path. A file known as the “Internal ENR Extension Table” will be created having the extension “EXT.
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NOISE SOURCE ADJUSTMENTS 2. Attach the throughline to both Port 1 and Port 2 of the Measurement unit (Figure 5-6). Rear Port 1 Noise In Unit Under Test Port 1 Throughline Cable (Use appropriate adapters) Measurement Unit Port 2 Front Port 2 Figure 5-6. Throughline Cables 3. Perform a 2-Port, 12-Term calibration on the Measurement unit. 4.
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ADJUSTMENTS NOISE SOURCE Hint: Press the Hard Copy key to access this output function if the Measurement unit is a MS462XX VNMS. Press the Menu key under the Hard Copy group if the Measurement unit is a 37000 VNA. NOTE The MS462XX VNMS and the 37000 VNA save text files with the “Read-Only” attribute turned on. Use the File/Properties feature of Windows Explorer to disable the “Read-Only” attribute. 10. Open the text file (nxxxxxx.txt) with the Notepad program (supplied with Microsoft Windows).
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NOISE SOURCE ADJUSTMENTS 18. Copy this file to a floppy diskette. 19. Insert the floppy diskette into the UUT floppy disk drive. 20. Press the Appl key and then select the following: CHANGE APPLICATION SETUP NOISE FIGURE SETUP LOAD ENR TABLE FROM FLOPPY DISK INTERNAL ENR EXTENSION TABLE RETURN 21. Save the Internal ENR Extension table to hard disk: select the following: SAVE ENR TABLES TO HARD DISK INTERNAL ENR EXTENSION TABLE RETURN Figure 5-7.
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Chapter 6 Troubleshooting Table of Contents 6-1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3 6-2 SELF TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3 6-3 TROUBLESHOOTING TOOLS FOR THE CPU MODULE SRAM . . . . . . . . . . . . . . . . . . . . . . . . . . SRAM DISK . . . . . . . . . . . . . . . . . . . . . . . FLASH MEMORY . . . . . . . . . . . . . . . . . . . . EXTENDED FLASH MEMORY . . . . . . . . . . . . DRAM . . . . . . . .
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Chapter 6 Troubleshooting 6-1 INTRODUCTION CAUTION The procedures in this chapter should be performed by qualified technical personnel only. These procedures may require access to internal components, and care should be taken to avoid contact with potentially hazardous voltages. It is strongly recommend that any MS462XX Vector Network Measurement System repair be performed by qualified technical personnel only. Refer to Section 1-8 for a listing of spare parts mentioned in this chapter.
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CPU MODULE TROUBLESHOOTING The extended self test is initiated by pressing the Utility key, then selecting: Diagnostics Start Self Test The extended self test performs extensive tests on the entire instrument, but the RF signal paths and components are minimally tested. Only the Down Converter Module and the Receiver PCB 125KHz IF signal paths are tested during the extended self test.
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TROUBLESHOOTING The Troubleshooting Menu CPU MODULE The Troubleshooting menu is shown in the graphic screen capture below. Descriptions of the menu selections follow. Figure 6-1.
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CPU MODULE TROUBLESHOOTING SRAM This test verifies whether the internal SRAM is functioning properly. If this test fails, the instrument beeps and the Front Panel LEDs flash. The instrument will automatically reboot after this test is complete. CAUTION The SRAM test overwrites all front panel setups (including internal), Cal coefficients and the Service Log. SRAM DISK This test verifies whether the internal SRAM disk is functioning properly.
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TROUBLESHOOTING CPU MODULE DRAM This test verifies whether the internal DRAM is functioning properly. The display will go blank when this test begins. If the test fails, the instrument will beep four times and the Front Panel LEDs will flash. GRAPHICS VRAM This test verifies whether the Graphics VRAM is functioning properly. The display will go blank when this test begins. If the test fails, the instrument will beep four times and the front panel LEDs will flash.
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HARDWARE TROUBLESHOOTING 6-4 HARDWARE TROUBLESHOOTING The Scorpion Vector Network Measurement System hardware includes the following: q q q q q q CPU MODULE 6-8 Power Supply (PDU) Module Front Panel Assembly Option Module (for units equipped with Option 4 or 5 only) q System does not boot up q Display problems Printer Problems GPIB Interface Problems q Hard Disk Problem CPU Module Source Module(s) Receiver Module CPU module-related system failures include: q System Boot-up Problem TROUBLESH
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TROUBLESHOOTING Printer Output Problem GPIB Interface Problem HARDWARE TROUBLESHOOTING This condition can be a result of a failure of the printer, printer cable, or CPU module. 1. Connect a different printer and determine if the instrument works with that printer. If so, replace the printer. 2. Replace the printer cable. 3. Replace the CPU module. This condition can be a result of a failure of the CPU module. 1.
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HARDWARE TROUBLESHOOTING Phase-lock Loop Problem TROUBLESHOOTING If the MS462XX detects a Phase-lock loop problem during normal operation, an error code followed by a brief error message will be displayed on the screen. The error code will also be written to the service log along with some of the operating data gathered from the system at the time of failure.
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TROUBLESHOOTING HET OSCILLATOR VOLTAGE HARDWARE TROUBLESHOOTING This function (Figure 6-3) allows the user to verify whether the HET oscillator of the Main Source Module is operating properly. Figure 6-3.
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HARDWARE TROUBLESHOOTING SOURCE 1 TROUBLESHOOTING This function allows the user to verify that various parts of the main Source Module are operating properly, and includes the following tests: DDS REFERENCE CLOCK VOLTAGE OFFSET VCO VOLTAGE NOTE Common Offset Mode must be turned off for the OFFSET VCO VOLTAGE function to operate properly. To turn common offset mode off, select RETURN/SELECT MODES/COMMON OFFSET MODE OFF.
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TROUBLESHOOTING HARDWARE TROUBLESHOOTING 2. Select the menu soft keys as follows: DIAGNOSTICS SERVICE LOG 3. Check the Power Distribution Unit output voltage. 4. Use a frequency counter or Spectrum Analyzer to verify whether a valid 10 MHz signal is being received at J2 of both the Main Source Module and the Option Module. 5. If the 10 MHz signal is missing, verify whether the instrument is set up to use an external 10 MHz reference. 6. Press the Utility front panel key. 7.
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HARDWARE TROUBLESHOOTING TROUBLESHOOTING Troubleshooting tools include: q Service Log: Error codes will be written to the service log along with some data representing system conditions at the time of failure. ALC Error Codes: q ALC1 LVLD FAIL Source 1 ALC Leveled Failure ALC2 LVLD FAIL Source 2 ALC Leveled Failure ML243XA Power Meter q MA247XA Power Sensor The presence of these error codes do not necessarily indicate an instrument failure.
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TROUBLESHOOTING HARDWARE TROUBLESHOOTING A typical profile of unleveled power is shown in Figure 6-4. If the leveled trace looks like the unleveled trace, it indicates that a problem has occurred in the ALC circuitry. Replace the source module, Non-Reversing Module (MS462XA only), Auto -Reversing Module (MS462XB only), or Port 3 Module (MS462XB with Option 3A or 3B only). Figure 6-4.
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HARDWARE TROUBLESHOOTING RECEIVER MODULE TROUBLESHOOTING There are four receiver module related system failures: q q q q 10 MHz Reference Oscillator failures ALC failures RF Component failures Noise Source Power Supply failures Special fixtures consists of the items listed below: Part Number Description Quantity D43023-3 Flex Extender PCB Assembly 1 806-89 3- foot flex coax cable 3 49523 2-foot MCX to MCX cable 4 The use of these special fixtures allows the Receiver Module be placed on top
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TROUBLESHOOTING HARDWARE TROUBLESHOOTING Receiver Module Figure 6-5. Rear Panel Showing Receiver Module Placed for Easy Access Flexible Cable Figure 6-6.
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HARDWARE TROUBLESHOOTING 10 MHz Reference Oscillator Problem TROUBLESHOOTING Possible causes are listed below: q q 10 MHz Reference Oscillator failure Power Supply failure Troubleshooting tools include: q Service Log: Since the 10 MHz reference plays an important role in every phase lock circuitry in the instrument, an error message displayed on the screen may include a series of suffixes indicating various phase lock loop failures.
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TROUBLESHOOTING HARDWARE TROUBLESHOOTING Figure 6-7 shows the RF components layout in the Receiver Module. Figure 6-8 shows the system cabling. IF X2 IF DOWN CONVERSION MODULE X2 10 MHz ARM PRE AMP N FIG N FIG STEP ATTN STEP ATTN P3 P1 P2 Figure 6-7.
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HARDWARE TROUBLESHOOTING TROUBLESHOOTING Front Panel SYSTEM CABLES PDU LCD Pwr LCD Date Key Bd Floppy Hetrodyne Offset uP Board Common Offset nc J2 J1 Pri.Src1 J4 J7 J6 J3 10 MHz ALC2 J14 Rcv Opt Srce Opt.Src2 Loc Osc J24 J2 Rcv X2 J6 DC J1 Options Bd. J4 J7 J5 J2 J2 J1 J103 J3 Opt Out 10 MHz J13 Rcv J102 J101 ALC2 N Fig IF Pri Srce J23 J2 Rcv X2 J20 Rcv J22 Rcv J17 J15 Rcv Rcv Receiver Module Figure 6-8.
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TROUBLESHOOTING NOISE SOURCE POWER SUPPLY HARDWARE TROUBLESHOOTING The following steps can help isolate noise source power supply failures: 1. Use an oscilloscope to measure the Noise Source power supply output. Connect the probe to the rear panel BNC connector marked “Noise +28 V.” 2. Press the Appl key and select the following soft keys: CHANGE APPLICATION SETUP MEASUREMENT TYPE NOISE FIGURE 3. POWER DISTRIBUTION UNIT Observe that a pulsed +28 V DC signal appears on the Oscilloscope.
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HARDWARE TROUBLESHOOTING FRONT PANEL ASSEMBLY There are three Front Panel Assembly related failures: q q q Front Panel Keys/Knobs Problem TROUBLESHOOTING Non responsive keys Non responsive front panel knob LCD Display problems The following could cause non-responsiveness: q Defective keypad q Corroded key traces on front panel PCB assembly Defective front panel knob encoder q To troubleshoot a front panel key or knob problem, use the following procedure: 1.
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TROUBLESHOOTING 6-5 SOFTWARE PROBLEM SOFTWARE PROBLEM It is important to provide the factory as many details of the conditions immediately preceding the onset of the problem. This important information can provide clues and aid the factory in reproducing the problem. When encountering a software problem, please note the following: q q Measurement mode (S-parameters, noise figure, etc.
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NOISE FIGURE MEASUREMENT PROBLEM 2. Check DUT mating connector(s) condition and pin depth. 3. Measure an alternate known good DUT, if possible. 4. Check if the environment is stable enough for the accuracy required for the DUT measurement. 5. Check that the system has not been subjected to greater-than-specification variations in temperature. 6. Check that the system has not been placed in direct sun light or next to a changing cooling source, such as a fan or air conditioning unit. 7.
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TROUBLESHOOTING NOISE FIGURE MEASUREMENT PROBLEM Account for a calibration performed with loss and later removed for the measurement. Problem NOISE FIGURE OVERLOAD error message displayed: Solution DUT has too much gain (typically >30 dB). Use an attenuator to reduce the input power to Port 2. Try using a 5 dB ENR Noise Source. Problem Significant difference between Internal and External Noise Source measurement: Solution 1. Check for the presence of the Internal ENR Extension Table file (Nxxxxx.
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NOISE FIGURE MEASUREMENT PROBLEM Problem Fails the Raw Receiver Noise Figure Check: Solution Check the setup connections: TROUBLESHOOTING 1. Check the Noise Source ENR Table stored on the instrument. Refer to the MS462XX Scorpion Measurement Guide (P/N: 10410-00213) for instructions on how to create a new ENR Table file. 2. Check the Internal ENR Extension Table stored on the instrument.
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TROUBLESHOOTING 6-8 FREQUENCY TRANSLATING GROUP DELAY MEASUREMENT GROUP DELAY The measurement process consists of generating the modulating signal, modulating the source, demodulating the received signal, and performing the phase comparison. The modulating signal is generated in the Option Module and is fixed at 453.125 kHz. The modulating signal is input to J5 of the Source Module 1 to modulate the source signal. The demodulating of the received signal is done in the Option Module.
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Chapter 7 Removal and Replacement Procedures Table of Contents 7-1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3 7-2 FRONT PANEL . . . . . . . . . Floppy Disk Drive Assembly LCD Assembly . . . . . . . . LCD Backlight Driver PCB . Interface PCB . . . . . . . . Backlight Fluorescent Lamp 7-3 POWER DISTRIBUTION UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-9 PDU Fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Chapter 7 Removal and Replacement Procedures 7-1 INTRODUCTION CAUTION The procedures in this chapter should be performed by qualified technical personnel only. These procedures may require access to internal components, and care should be taken to avoid contact with potentially hazardous voltages or damage from static electricity. It is strongly recommended that MS462XX Vector Network Measurement System repair be performed by qualified technical personnel only.
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FRONT PANEL 7-2 FRONT PANEL REMOVAL AND REPLACEMENT The MS462XX Vector Network Measurement System front panel assembly contains the following subassemblies (refer to Section 1-8 for a part number listing): q Floppy Disk Drive Assembly q Front Panel Interface PCB with Keypad LCD Assembly LCD Backlight PCB LCD Backlight Lamp q q q Tools Required: q q Procedure: Phillips screwdriver 5/16” nut driver 1. Remove the AC power cord. 2.
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REMOVAL AND REPLACEMENT FRONT PANEL Figure 7-2. Front Panel Removal To completely remove the front panel from the instrument: 5. Disconnect the floppy disk drive interface cable. 6. Disconnect the front panel interface PCB ribbon cable. 7. Disconnect the LCD flex cable from the CPU. CAUTION Connecting and disconnecting the connector at the LCD display interface creates a stress that can cause damage to the LCD display.
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FRONT PANEL REMOVAL AND REPLACEMENT FLOPPY DISK DRIVE LCD ASSEMBLY LCD BACKLIGHT PCB INTERFACE PCB Figure 7-3. Front Panel Components Floppy Disk Drive Assembly To remove the floppy disk drive, remove the drive with the mounting brackets attached. 9. Using a 5/16” nut driver, remove the two mounting nuts that secure the drive assembly to the front panel. 10. Using a Phillips screwdriver, remove the two side mounting brackets from the drive.
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REMOVAL AND REPLACEMENT 14. FRONT PANEL Separate the LCD module from the backing plate. If necessary, remove the LCD backlight PCB from the plate (refer to the procedure below). Reverse the procedure to install the new LCD assembly. LCD Backlight Driver PCB The LCD backlight driver PCB is secured to the LCD assembly back plate, and is removed with it. The LCD assembly must be removed from the front panel before the LCD backlight Driver PCB can be removed and replaced. 15.
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FRONT PANEL REMOVAL AND REPLACEMENT TAPE TABS (5) Figure 7-4. Backlight Lamp Removal Backlight Fluorescent Lamp The Backlight Fluorescent Lamp is secured to the LCD assembly. The LCD assembly must be removed from the front panel before the Backlight Fluorescent Lamp can be removed and replaced. Refer to Section 1-10 for more information on the LCD backlight lamps. NOTE This procedure is for the Anritsu LCD assembly number 15-92 only (Sharp P/N: LQ9D340).
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REMOVAL AND REPLACEMENT 7-3 POWER DISTRIBUTION UNIT Tools Required: Procedure: POWER DISTRIBUTION UNIT The PDU is mounted inside the main cabinet and secured using two screws through the rear panel. Phillips screwdriver 1. Remove the AC power cord. 2. Remove the front panel (refer to Section 7-2). 3. Remove the two Phillips screws that secure the PDU to the system back panel. PDU MOUNTING SCREWS (2) Figure 7-5. PDU Mounting Screws 4.
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POWER DISTRIBUTION UNIT REMOVAL AND REPLACEMENT Figure 7-6. PDU Removal Replacement is the opposite of removal. Fan Assembly Replacement: Tools Required: The fan assembly (ND49520) is mounted on the PDU, and can be replaced separately after the PDU is removed from the instrument. Phillips screwdrivers (straight and right angle offset) 1. Using a straight Phillips screwdriver, remove the 12 screws (4 on each side, 4 along the back) that secure the PDU cover. Remove the PDU cover. 2.
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REMOVAL AND REPLACEMENT PDU Fuse Procedure: POWER DISTRIBUTION UNIT The MS462XX contains three fuses, two internal and one external. The external, rear-panel-mounted fuse is rated at 5A, 250V, F (quick acting). It is designed to blow first in the event of an over-current condition. Of the two internal fuses, one is rated at 6.3A, 250V, F (quick acting), and the other at 15A, 32Vdc (automotive type).
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CPU ASSEMBLY 7-4 CPU ASSEMBLY Tools Required: Procedure: REMOVAL AND REPLACEMENT The CPU assembly is the topmost assembly in the cabinet and is secured by four screws through the rear panel. The front panel must be removed to allow access to the CPU assembly. Phillips screwdriver Follow the instructions that are packaged with the replacement CPU. CPU ASSEMBLY MOUNTING SCREWS (4) Figure 7-8.
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REMOVAL AND REPLACEMENT LCD BACKLIGHT CABLE CPU ASSEMBLY INTERFACE PCB CABLE LCD FLEX CABLE FLOPPY DISK DRIVE CABLE Figure 7-9.
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CPU ASSEMBLY REMOVAL AND REPLACEMENT System Firmware PROM The system operating firmware is stored in the System Firmware PROM (U75). The PROM may be changed to update or repair the system firmware as necessary. Tools Required: PLCC IC Removal/Insertion Tool Procedure: Locate and remove the System Firmware PROM (location 14 below) using the PLCC IC Removal Tool. TO CONNECTOR BOARD (D43017) 7 MAIN CPU: 1 - MC68040 CPU 2 - DRAM CONTROLLER 3 - 16 MB LOCAL DRAM 4 - 48 MB EXP.
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REMOVAL AND REPLACEMENT CPU Heatsink with Fan Tools Required: Procedure: CPU ASSEMBLY The system CPU is protected by a thermal heat sink and fan combination. The heatsink with fan may be replaced as necessary. None Locate and remove the CPU heatsink and fan assembly (location 1, Figure 7-10). Replacement is the opposite of removal. Lithium Battery Tools Required: Procedure: The system battery should be replaced every three years, or as necessary.
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CPU ASSEMBLY REMOVAL AND REPLACEMENT 8. If the instrument is fitted with Option 4X, press the Appl key and select: CHANGE APPLICATION SETUP MEASUREMENT TYPE TRANSMISSION AND REFLECTION NOISE FIGURE / NOISE FIGURE SETUP ENR TABLE OPERATIONS SAVE ENR TABLE TO FLOPPY DISK 9.
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REMOVAL AND REPLACEMENT 16. CPU ASSEMBLY If the instrument is fitted with Option 4X, press the Appl key, select: CHANGE APPLICATION SETUP MEASUREMENT TYPE TRANSMISSION AND REFLECTION NOISE FIGURE NOISE FIGURE SETUP ENR TABLE OPERATIONS LOAD ENR TABLE FROM FLOPPY DISK 17. Load the files that were saved to the floppy disk in Step 9 (Vendor ENR Table, Internal ENR Extension Table, and optional External ENR Extension Table). NOTE It is not sufficient to simply save these files to the hard drive.
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RECEIVER MODULE ASSEMBLY 7-5 RECEIVER MODULE ASSEMBLY Tools Required: Procedure: REMOVAL AND REPLACEMENT The receiver assembly is the bottom assembly in the cabinet and is secured by two screws through the rear panel. The front panel must be removed to allow access to the receiver assembly. Phillips screwdriver 1. Remove the AC power cord. 2. Remove the front panel assembly (refer to Section 7-2). 3.
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REMOVAL AND REPLACEMENT 5. RECEIVER MODULE ASSEMBLY Carefully pull the receiver module straight out from the front of the instrument (Figure 7-12). RECEIVER MODULE Figure 7-12. Receiver Module Removal Replacement is the opposite of removal. NOTE Individual modules mounted on the Receiver Assembly may vary according to the configuration of a particular system.
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TEST PORT CONNECTOR AND PORT MODULE REMOVAL AND REPLACEMENT 7-6 TEST PORT CONNECTOR AND PORT MODULE Tools Required: The following procedure describes the proper steps to remove and install the Test Port Connector and Port Module. q q q q Removal Procedure: Installation Procedure: 7-20 Anritsu 01-202 universal adapter wrench 5/8” open end wrench 5/8” open end torque wrench, 120 in-lb 5/16” open end torque wrench, 8 in-lb 1. Remove the Port Module mounting screws from the receiver PCB. 2.
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REMOVAL AND REPLACEMENT 7-7 OPTION AND SOURCE MODULES Tools Required: Procedure: OPTION AND SOURCE MODULES 7. Use the 5/16” torque wrench to tighten the connection between the Test Port connector and the Port Module to 8 in-lb. 8. Tighten the Port Module mounting screws. The MS462XX Vector Network Measurement System option and source modules are secured by Phillips screws through the rear panel.
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OPTION AND SOURCE MODULES REMOVAL AND REPLACEMENT OPTION AND SOURCE MODULE MOUNTING SCREWS (2 PER OPTION MODULE) (4 PER SOURCE MODULE) Figure 7-13. Option and Source Module Mounting Screws A2 OPTION MODULE OPTION SOURCE MODULE SOURCE MODULE Figure 7-14.
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REMOVAL AND REPLACEMENT 7-8 BACKPLANE PCB ASSEMBLY Tools Required: Procedure: BACKPLANE COVER MOUNTING SCREWS BACKPLANE PCB ASSEMBLY The backplane PCB assembly is mounted to the rear panel of the cabinet and is secured by 18 screws. The PCB is protected by the backplane PCB cover that is mounted to the rear panel by four screws. Each of the inside modules plug into the backplane PCB and must be removed before removing the backplane PCB. Phillips screwdriver 1. Remove the AC power cord. 2.
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BACKPLANE PCB ASSEMBLY 5. REMOVAL AND REPLACEMENT Remove the backplane PCB mounting screws (Figure 7-16). BACKPLANE PCB Figure 7-16. Backplane PCB Removal Replacement is the opposite of removal.
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Appendix A Connector Care and Handling Table of Contents A-1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3 A-2 CONNECTOR CARE AND HANDLING . . . . . . . . . . . Beware of Destructive Pin Depth of Mating Connectors. Avoid Over-Torquing Connectors . . . . . . . . . . . . . Cleaning Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Appendix A Connector Care and Handling A-1 A-2 INTRODUCTION This appendix provides information on the proper care and handling of RF sensor connectors. CONNECTOR CARE AND HANDLING Anritsu Vector Network Measurement Systems are high-quality, precision laboratory devices and should receive the care and respect normally afforded such devices. Follow the precautions listed below when handling or connecting these devices.
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CONNECTOR CARE AND HANDLING If the measured connector is out of tolerance in the “+” region of the outer scale, the center pin is too long (see Table A-1). Mating under this condition will likely damage the precision RF component connector. If the test device connector measures out of tolerance in the “–” region, the center pin is too short. This should not cause damage, but it will result in a poor connection and a consequent degradation in performance. Table A-1.
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CONNECTOR CARE AND HANDLING Cleaning Connectors The precise geometry that makes the RF component's high performance possible can be easily disturbed by dirt and other contamination adhering to the connector interfaces. To clean the connector interfaces, use a clean cotton swab that has been dampened with denatured alcohol. NOTE Most cotton swabs are too large to fit in the smaller connector types. In these cases, it is necessary to peel off most of the cotton and then twist the remaining cotton tight.
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Appendix B Performance Specifications Click here for the Anritsu documents web page.
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SUBJECT INDEX # TO C Subject Index # MS4623C/MS4624C . . . . . . . . . 2-43 to 2-44 MS4623D/MS4624D . . . . . . . . . . . . . 2-46 10 MHz calibration . . . . . . . . . . . . . . . . 5-4 to 5-7 clock distribution . . . . . . . . . . . . . . . 2-14 bounding circuitry . . . . . . . . . . . . . . . . . 2-6 37SF50 phase harmonic standards check . . . . 3-36 C A ADC clock generation . . . . . . . . . . . . . . 2-14 ALC adjustment. . . . . . . . . . . . . . . . 5-8 to 5-9 calibration . . . . . . . . . . .
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D TO G SUBJECT INDEX D doubler . . . . . . . . . . . . . . . . . . . . . . 2-15 DDS reference clock . . . . . . . . . . . . . . . . 2-6 down conversion module description . . . . . . 2-10 descriptions ALC circuitry . . . . . . . . . . . . . . . . . . 2-8 auto-reversing module . . . . . . . . . . . . 2-15 bounding circuitry . . . . . . . . . . . . . . . 2-6 central processor module . . . . . . . . . . . 2-25 common offset mode . . . . . . . . . . . . . . 2-8 DDS reference clock . . . . . . . . . . . .
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SUBJECT INDEX H TO P VRAM troubleshooting . . . . . . . . . . . . . 6-7 MS462XB receiver configuration . . . . . . . . 2-17 MS462XC receiver configuration . . . . . . . . 2-18 H MS462XD receiver configuration . . . . . . . . 2-19 hardware troubleshooting . . . . . . . . . 6-8 to 6-22 harmonic generator mode . . . . . . . . . . . . . 2-9 N harmonic output check . . . . . . . . . . . . . . 3-39 negative noise figure, troubleshooting . . . . . . 6-24 heat sink removal . . . . . . . . . . . . . . . .
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R TO T SUBJECT INDEX self test . . . . . . . . . . . . . . . . . . . . . . . 6-3 pin depth definition . . . . . . . . destructive mating . . . gauge . . . . . . . . . . test port specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4 A-3 A-3 A-4 port 1/2 module . . . . . . . . . . . . . . . . . . 2-16 port 3 module . . . . . . . . . . . . . . . . . . . 2-16 port module removal . . . . . . . . . . . . . . . 7-20 serial number . .
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SUBJECT INDEX test equipment for calibration. . . . . . . . . . . . . . . . . . 5-4 recommended for service . . . . . . . . 1-7 to 1-9 test port connector configurations . . . . . . . . . . . . . . . . . 2-15 removal . . . . . . . . . . . . . . . . . . . . 7-20 transmission/reflection . . . . . . . . . . . . . . 1-3 tripler . . . . . . . . . . . . . . . . . . . . . . . 2-15 troubleshooting 10 MHz reference oscillator . . . . . . . . . 6-18 ALC . . . . . . . . . . . . . . . . . . . . . . 6-13 CPU module . .