Anritsu MS2681A Service Manual
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Anritsu MS2681A Service Manual

Spectrum analyzer
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MS2681A/MS2683A/MS2687A
Spectrum Analyzer
Service Manual
Second Edition
To ensure that this equipment is used safety, important
safety items are explained in the MS2681A/83A/87A
Operation Manual. This document explains important
service items related to service.
Read both the
operation manual and this document, and keep both
with the MS2681A/83A/87A.
Measurement Solutions
ANRITSU CORPORATION
Document No.: M-W1754BE-2.0

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Summary of Contents for Anritsu MS2681A

  • Page 1 Spectrum Analyzer Service Manual Second Edition To ensure that this equipment is used safety, important safety items are explained in the MS2681A/83A/87A Operation Manual. This document explains important service items related to service. Read both the operation manual and this document, and keep both with the MS2681A/83A/87A.
  • Page 2 BEFORE using the equipment. Some or all of the following five symbols may not be used on all Anritsu equipment. In addition, there may be other labels attached to products which are not shown in the diagrams in this manual.
  • Page 3 If repair is required, contact the sales representative, branch office, or agent at the telephone number and address given in this document or in the equipment operation manual. Although not recommended by Anritsu Corporation, if it is really imperative to open the covers for emergency repair, take great care not to touch any dangerous parts.
  • Page 4 Trademark MS, Microsoft, MS-DOS, Windows and Word98 are the registered trademarks of Microsoft Corporation US in the US and other countries. IBM and AT are the registered trademarks of International Business Machines Corporation. NI-488.2 a registered trademark National Instruments Corporation.
  • Page 5 Power Line Fuse Protection For safety, Anritsu products have either one or two fuses in the AC power lines as requested by the customer when ordering. Single fuse: A fuse is inserted in one of the AC power lines. Double fuse: A fuse is inserted in each of the AC power lines.
  • Page 7 This service manual is written for both our own and our dealer's service personnel who have completed a prescribed training course and are aware of the danger of fire and electrical shock and other accidents. “MS268*A” in the main chapter means “MS2681A/83A/87A”.

  • Page 8: Table Of Contents

    Table of Contents For Safety............About This Manual ........Section 1 Description of Module Operation 1-1 Outline................List of Replacement Modules........1-21 Module Operation............1-23 Section 2 Troubleshooting......Troubleshooting Flow............ Mechanical Configuration ..........Check after Module Replacement......... 2-33 Section 3 Adjustment and Calibration..Service Kit ..............

  • Page 9: Section 1 Description Of Module Operation

    1.1.2 Outline for MS2683A ..........1.1.3 Outline for MS2687A ..........List of Replacement Modules ........1-21 1.2.1 List of Replacement Modules for MS2681A ....1-21 1.2.2 List of Replacement Modules for MS2683A ....1-21 1.2.3 List of Replacement Modules for MS2687A ....1-22...

  • Page 10: Outline

    1.1.1 Outline for MS2681A Please refer to Fig. 1-1 Overall Block Diagram. The MS2681A is a superheterodyne system scanning-type spectrum analyzer. For RF input after passing through the 8 GHz STEP ATTENUATOR frequency of 9 kHz to 3.0 GHz the signal pass through the Coaxial LPF and then to A10 3 GHz CONVERTER.
  • Page 11 1.1 Outline At A06 IF unit, the incoming signal is divided in two paths. The main route leads to image rejection filters; while second, highly attenuated feeler path signal (only 66 MHz) is fed to A05 SCAN/AD. Second route is not used in spectrum analyzer mode.

  • Page 12: Outline For Ms2683A

    Section 1 Description of Module Operation 1.1.2 Outline for MS2683A Please refer to Fig. 1-2 Overall Block Diagram. The MS2683A is a superheterodyne system scanning-type spectrum analyzer. The RF input signal after passing through the 8 GHz STEP ATTENUATOR is switched by 1.6 GHz YTF/SW to two different signal routes according to the measurement frequency range.
  • Page 13 1.1 Outline Internal calibration operation being carried out, these calibration signal is fed to RF signal-route through the switch in 8 GHz STEP ATTENUATOR. In the A13 2ND CONVERTER, 460.7 or 466 MHz first IF signal gets mixed with second Local Oscillator signal (400 MHz) to generate a 60.7 or 66 MHz second IF signal by second mixer after passing several band-pass filters and amplifiers, and fed to A06 IF.

  • Page 14: Outline For Ms2687A

    Section 1 Description of Module Operation 1.1.3 Outline for MS2687A Please refer to Fig. 1-3 Overall Block Diagram. The MS2687A is a superheterodyne system scanning-type spectrum analyzer. The RF input signal after passing through the SWITCHED ATTENUATOR is switched by DIPLEXING Band SW to two different signal routes according to the measurement frequency range.
  • Page 15 1.1 Outline If frequency Band is selected to Ext Band (bands:K,Ka,Q,U,V,E,W), the first Local signal is switched by A14 1ST LO AMP/EXT LO AMP to 1st Lo Output, and 460.7 or 466 MHz First IF signal from External mixer is fed to the A13 2ND CONVERTER.”...
  • Page 16 Section 1 Description of Module Operation In the A07 MEAS DSP, the digital signal from the A05 SCAN/AD is processed by DSP. A07 MEAS DSP also generates various commands required for controlling or setting of all hardware units inside the instrument. The A03 MAIN CPU controls various interface functions such as reading the Key Inputs or remote commands received, and various outputs such as prints of various data.
  • Page 17 1.1 Outline Fig. 1-1...
  • Page 18 Section 1 Description of Module Operation 1-10...
  • Page 19 1.1 Outline 1-11...
  • Page 20 Section 1 Description of Module Operation 1-12...
  • Page 21 1.1 Outline Fig. 1-2 1-13...
  • Page 22 Section 1 Description of Module Operation 1-14...
  • Page 23 1.1 Outline 1-15...
  • Page 24 Section 1 Description of Module Operation 1-16...
  • Page 25 1.1 Outline Fig. 1-3 1-17...
  • Page 26 Section 1 Description of Module Operation 1-18...
  • Page 27 1.1 Outline 1-19...
  • Page 28 Section 1 Description of Module Operation 1-20...

  • Page 29: List Of Replacement Modules

    1.2 List of Replacement Modules 1.2 List of Replacement Modules 1.2.1 List of Replacement Modules for MS2681A Model number Name MM200034A A01 MOTHER BOARD MM200035A A02 FRONT BOARD MM200036A A03 MAIN CPU MM200037A A04 PC CARD MM200038A A05 SCAN/AD MM200039A...

  • Page 30: List Of Replacement Modules For Ms2687A

    Section 1 Description of Module Operation 1.2.3 List of Replacement Modules for MS2687A Model number Name MM200034A A01 MOTHER BOARD MM200035A A02 FRONT BOARD MM200036A A03 MAIN CPU MM200037A A04 PC CARD MM200038A A05 SCAN/AD MM200039A A06 IF MM200041A A07 MEAS DSP MM200059A A08 LOCAL02 MM200060A...

  • Page 31: Module Operation

    1.3 Module Operation 1.3 Module Operation Each module functions as follows: • A01 MOTHER BOARD Supplies power from the power unit to each module. Contains signal and control wires between modules. • A02 FRONT BOARD Reads the rotary knob status on the front panel. Converts the key data (on the front panel sent from the SW BOARD) to key codes.
  • Page 32 Section 1 Description of Module Operation • A05 SCAN/AD In spectrum analyzer mode, high-resolution AD-Converter (or high-speed AD- Converter in case of high-speed time domain) converts the amplitude signal of IF signal (after log detection or linear detection that passed RBW at A06 IF) to digital signal.
  • Page 33 Displays the window. • INVERTER Supplies power to the LCD back light. • 8 GHz STEP ATTENUATOR (MS2681A,MS2683A) Attenuates the RF signal in the range of 0 to 62 dB in steps of 2 dB. • 1.6 GHz YTF/SW (MS2683A only) At band 0 (mostly for frequency below 3), outputs the RF signal to A10 3 GHz Converter.
  • Page 34 Section 1 Description of Module Operation • SW BOARD Outputs the key data of the key input on the front panel to A02 FRONT BOARD. • DIPLEXING BANDSWITCH (MS2687A only) Switches the input signal to A10 3 GHZ CONVERTER (for BAND0) or A13 2ND CONVERTER (for all other bands).

  • Page 35: Section 2 Troubleshooting

    2.3.14 Check after LCD replacement ....... 2-34 2.3.15 Check after INVERTER replacement.... 2-34 2.3.16 Check after 8 GHz STEP ATTENUATOR replacement (MS2681A or MS2683A) ..2-35 2.3.17 Check after 1.6 GHz YTF/SW replacement (MS2683A only)..........2-35 2.3.18 Check after 8 GHz MIXER replacement (MS2683A only)..........
  • Page 36 Section 2 Troubleshooting 2.3.20 Check after A14 1ST LO/EXT LO AMP replacement (MS2687A only) ......2-35 2.3.21 Check after SWITCHED ATTENUATOR replacement (MS2687A only) ......2-35 2.3.22 Check after 30 GHz YTF replacement (MS2687A only) ..........2-35 2.3.23 Check after DIPLEXING Bandswitch replacement (MS2687A only) ......

  • Page 37: Troubleshooting Flow

    2.2 Mechanical Configuration 2.1 Troubleshooting Flow Here are the troubleshooting step flow to determine a faulty module according to the trouble symptoms. Power on [Faulty Module] ↓ → Does LED go on? Power Supply, A02 Front Board ↓ Yes → Is window display normal? To Flow A ↓...
  • Page 38 Section 2 Troubleshooting • When window display is abnormal (Flow A) ↓ → Is LCD back light normal? Inverter ↓ Yes Is display normal when external monitor is connected to → A03 Main CPU RGB Out? ↓ • When unable to perform frequency sweep (Flow B) ↓...

  • Page 39: Mechanical Configuration

    2.2 Mechanical Configuration 2.2 Mechanical Configuration 2.2.1 Disassembling/Assembling cabinet (Fig. 2-1) CAUTION Ensure the MS268*A is de-energized and the power cord is unplugged. (1) Remove Feet ([1] to [8]). Remove the S1/S2/S3 screws and remove the S3 screw of the rear. (2) Removing around cover [10].
  • Page 40 Section 2 Troubleshooting...
  • Page 41 2.2 Mechanical Configuration [10] [S3] [S2] [11] [S1] Fig. 2-1 Disassembling/Assembling Cabinet...
  • Page 42 Section 2 Troubleshooting...

  • Page 43: Disassembling/Assembling Rear Panel And Modules For Ms2681A And Ms2683A

    2.2 Mechanical Configuration 2.2.2 Disassembling/Assembling rear panel and modules for MS2681A and MS2683A (Fig. 2-2) a. Units and PC boards (1) Removing Rear Panel Disconnect the 3-pin female connector from the A03 Main CPU [6] male connector. Remove the S1 thirteen screw and lock washer sets (marked with ( ) and near the output connectors.
  • Page 44 Section 2 Troubleshooting (7) Removing A06 IF Disconnect the cables from A05 SCAN/AD [9]. Disconnect the cable from A10 3 GHz CONVERTER [3] to X11 on A06 IF [8]. Disconnect the cable from A13 2ND CONVERTER to X25 on [8]. Remove A06 IF [8] to pull backward.
  • Page 45 2.2 Mechanical Configuration c. Modules and Parts List [1] 323B14651 Rear Panel [2] MM200051A POWER SUPPLY [3] MM200044A A10 3 GHz CONVERTER [4] MM200045A A11 SWITCHED HALVER (MS2683A only) [5] 339H33695F Absorptional line [6] MM200036A A03 MAIN CPU [7] MM200059A A08 LOCAL02 (A08 LOCAL02 WITH OPT01) or (MM200060A) [8] MM200039A...
  • Page 46 Section 2 Troubleshooting 2-12...
  • Page 47 2.2 Mechanical Configuration [S2] [S1] [S3] [S4] [S5] [S6] [S8] [10] [S9] [S7] [11] [S11] [S10] Fig. 2-2 Disassembling/Assembling Rear Panel and Modules for MS2681A and MS2683A 2-13...
  • Page 48 Section 2 Troubleshooting 2-14...

  • Page 49: Disassembling/Assembling Rear Panel And Modules For Ms2687A

    2.2 Mechanical Configuration 2.2.3 Disassembling/Assembling rear panel and modules for MS2687A (Fig. 2-3) a. Units and PC boards (1) Removing Rear Panel Disconnect the 3-pin female connector from the A03 Main CPU [6] male connector. Remove the S1 thirteen screw and lock washer sets (marked with ( ) and near the output connectors.
  • Page 50 Section 2 Troubleshooting (7) Removing A06 IF Disconnect the cables from A05 SCAN/AD [9]. Disconnect the cable from A10 3 GHz CONVERTER [3] to X11 on A06 IF [8]. Disconnect the cable from A13 2ND CONVERTER to X25 on [8]. Remove A06 IF [8] to pull backward.
  • Page 51 2.2 Mechanical Configuration b. Cable Interconnection • X7 ←→ X12 A05 SCAN/AD 322U14699 X12: A06 IF 322U14629 • X8 ←→ X13 A05 SCAN/AD 322U14699 X13: A06 IF 322U14629 • X2 ←→ X24 A06 IF 322U14629 X24: A10 3 GHz Converter Unit •...
  • Page 52 Section 2 Troubleshooting 2-18...
  • Page 53 2.2 Mechanical Configuration [S2] [S1] [S3] [S4] [S5] [S6] [S8] [S9] [S7] [S14] [10] [12] [S10] [S13] [S12] [13] [S11] [15] [14] [11] [N1] [W1] Fig. 2-3 Disassembling/Assembling Rear Panel and Modules for MS2687A 2-19...
  • Page 54 Section 2 Troubleshooting 2-20...

  • Page 55: Disassembling/Assembling Modules For Ms2683A

    2.2 Mechanical Configuration 2.2.4 Disassembling/Assembling modules for MS2683A (Fig. 2-4) a. Modules (1) Removing 8 GHz MIXER Disconnect the semi-rigid cables from 8 GHz MIXER [1]. After removing the S1/S2 three screws, remove 8 GHz MIXER [1]. (2) Removing A13 2ND CONVERTER Disconnect all cables and semi-rigid cables from A13 2ND CONVERTER [2] and A14 1ST LO AMP [3].
  • Page 56 Section 2 Troubleshooting 2-22...
  • Page 57 2.2 Mechanical Configuration [N1] [S3] [S1] [S2] Fig. 2-4 Disassembling/Assembling Modules for MS2683A 2-23...
  • Page 58 Section 2 Troubleshooting 2-24...

  • Page 59: Disassembling/Assembling Modules For Ms2687A

    2.2 Mechanical Configuration 2.2.5 Disassembling/Assembling modules for MS2687A (Fig.2-5) a.modules (1) Removing DIPLEXING Bandswitch Disconnect all semi-rigid cables from DIPLEXING Bandswitch [1]. After removing the S1 two screws, remove DIPLEXING Bandswitch [1] from Switched Attenuator. (2) Removing A13 2ND CONVERTER Disconnect all cables and semi-rigid cables from A13 2ND CONVERTER [2].
  • Page 60 Section 2 Troubleshooting 2-26...
  • Page 61 2.2 Mechanical Configuration [N1] [S2] [N2] [S1] [S3] Fig. 2-5 Disassembling/Assembling Modules for MS2687A 2-27...
  • Page 62 Section 2 Troubleshooting 2-28...

  • Page 63: Disassembling/Assembling Front Unit

    2.2 Mechanical Configuration 2.2.6 Disassembling/Assembling front unit (Fig. 2-6) a. Removing TFT LCD MODULE (1) After removing the S1, S2 screws and encoder knob [5], remove the front panel [1]. (2) After removing the S3 screw, remove the [2], [3] and [4] to pull forward. (3) After removing the S4 screw and each cables, remove the LCD [2].
  • Page 64 Section 2 Troubleshooting 2-30...
  • Page 65 2.2 Mechanical Configuration [S4] [S1] [S2] Fig. 2-6 Disassembling/Assembling Front Unit 2-31...
  • Page 66 Section 2 Troubleshooting 2-32...

  • Page 67: Check After Module Replacement

    2.3 Check after Module Replacement 2.3 Check after Module Replacement Here are the adjustments and operational checks required after module replacement. Check is explained by assuming that the adjustments of new modules are completed. 2.3.1 Check after A01 MOTHER BOARD replacement Step Procedure In spectrum analyzer mode, execute Preset All and then All CAL;...

  • Page 68: Check After A08 Local02 Replacement

    Section 2 Troubleshooting 2.3.8 Check after A08 LOCAL02 replacement Step Procedure In spectrum analyzer mode, execute Preset All and then All CAL; and check that CAL statuses becomes completely zero. (referring to Para. 3.11) 2.3.9 Check after A10 3 GHz CONVERTER replacement Step Procedure Perform sweep adjustment (referring to Section 3.1).

  • Page 69: Check After 8 Ghz Step Attenuator Replacement (Ms2681A Or Ms2683A)

    2.3 Check after Module Replacement 2.3.16 Check after 8 GHz STEP ATTENUATOR replacement (MS2681A or MS2683A) Step Procedure Perform IF Gain2 adjustment (referring to Para. 3.7). Perform frequency characteristics compensation (referring to Para. 3.10, a and b). Perform Mechanical Switch Counter setting (referring to Para. 3.12).
  • Page 70 Section 2 Troubleshooting 2.3.23 Check after DIPLEXING Bandswitch replacemnt (MS2687A only) Step Procedure Perform YTF adjustment (referring to Para.…) Perform IF Gain2 adjustment (referring to Para.…) Perform frequency characteristics compensation (referring to Para.…) 2.3.24 Check after H.Mixer replacemnt (MS2687A only) Step Procedure Perform IF Gain2 adjustment (referring to Para.…)

  • Page 71: Section 3 Adjustment And Calibration

    Section 3 Adjustment and Calibration This section describes the overall adjustment and frequency characteristics compen- sation after repairing and then assembling the main body. Service Kit..............Required Equipment ..........Sweep Adjustment............. YTF D/A Adjustment (for MS2683A) ......YTF D/A Adjustment (for MS2687A) ......YTF Adjustment (for MS2683A or MS2687A) ...

  • Page 72: Service Kit

    The required equipment for overall adjustment and frequency characteristics compensation, is shown in Table 3-2. Table 3-2 Equipment required for overall adjustment and compensation Name Model Manufacturer Q'ty. Synthesized Signal Generator MG3633A Anritsu Swept Frequency Synthesizer 6769B Anritsu Synthesizer/Level Generator MG443B Anritsu Power Meter ML4803A...

  • Page 73: Sweep Adjustment

    3.3 Sweep Adjustment 3.3 Sweep Adjustment • Required Equipment 6769B Swept Frequency Synthesizer • Setup 6769B MS268*A WILTRON Signal Generator RF Output Fig. 3-1 • Procedures Span Adjustment (1) Set the Signal Generator to the frequency of 1 GHz and output level of +10 dBm.
  • Page 74 Section 3 Adjustment and Calibration R75 and R72 from the rear to front Fig. 3-2 Locations of Adjustment on A10 3 GHz Converter...

  • Page 75: Ytf D/A Adjustment (For Ms2683A)

    3.4 YTF D/A Adjustment (for MS2683A) 3.4 YTF D/A Adjustment (for MS2683A) • Required Equipment HP3478A Digital Multi-meter • Procedures (1) Set the MS2683A to center frequency of 4 GHz, span of 0 Hz, and a pre- selector tuning value of zero. (2) Adjust R38 so that X7 of A13 2nd Converter becomes –3.450 V in maintenance mode when YTF pre-tuning setting value is 3450 MHz (See Mainte YTF on page 4).

  • Page 76: Ytf D/A Adjustment (For Ms2687A)

    Section 3 Adjustment and Calibration 3.5 YTF D/A Adjustment (for MS2687A) • Setup A10 3GHz CONVERTER MICRO Extend cable A1307 YTF DRIVER Fig.3-4 A1307 set up for YTF D/A adjustment • Required Equipment HP3478A Digital Multi-meter • Procedures (1) Set the MS2687A to center frequency of 4 GHz, span of 0 Hz, and a preselector tuning value of zero.

  • Page 77: Ytf Adjustment (For Ms2683A Or Ma2687A)

    3.6 YTF D/A Adjustment (for MS2683A or MS2687A) 3.6 YTF Adjustment (for MS2683A or MS2687A) • Required Equipment 6769B Swept Frequency Synthesizer • Setup 6769B MS2683A or MS2687A WILTRON Fig. 3-5 • Procedures YTF tuning adjustment (for MS2683A) (1) Set the MS2683A to Band 1 (-H), with center frequency of 3.15 GHz, span of 1 MHz, sweeping time of 500 ms, and a pre-selector tuning value of zero.
  • Page 78 Section 3 Adjustment and Calibration • YTF sweep adjustment (for MS2683A) (1) Set Preset All, sweep time 200 ms, and pre-selector tuning value at zero. (2) Set the Signal Generator to 6.2 GHz and –10 dBm, and adjust R41 and R42 of A13 2nd Converter to make the signal display level at maximum.

  • Page 79: Cal Osc Adjustment

    • Required Equipment MG3633A Synthesized Signal Generator ML4803A Power Meter MA4601A Power Sensor • Setup MG3633A MS268*A Anritsu SYNTHESIZED SIGNAL GENERATOR MG3633A Anritsu P O W E R M E T E R M L48 03A MA4601A Fig. 3-6 • Procedures (1) Set the Signal Generator to 625 kHz and 0 dBm (calibrated at cable end).

  • Page 80: If Gain2 Adjustment (For Ms2683A Or Ma2687A)

    MA4701A Power Sensor • Setup MS2683A or MS2687A 6769B WILTRON ML4803A Anritsu P OW E R M ETE R M L4803A MA4701A Fig. 3-7 • Procedures (for MS2683A) (1) Execute All CAL (2) Set the Signal Generator to 4.8 GHz and –10 dBm (calibrated at cable end).
  • Page 81 3.8 IF Gain2 Adjustment (for MS2683A or MS2687A) • Procedures (for MS2687A) (1) Execute All CAL. (2) Set the Signal Generator to 4.8 GHz and –10 dBm (calibrated at cable end). (3) Set the MS2687A to Band 1–, with center frequency of 4.8 GHz. (4) Set the MS2687A to span of 20 kHz, RBW of 3 kHz, VBW of 100 Hz, sweep time of 200 ms, RLV of –10 dBm, and ATT at 10 dB.

  • Page 82: Maintenance Mode

    Section 3 Adjustment and Calibration 3.9 Maintenance Mode The following operations put the MS268*A main body into the maintenance mode. • Manual operation: (1) Put power on while pressing "0" key. → → →Mainte- Shift More nance • Remote control: Send "MAINTE SIGANA,ON"...

  • Page 83: Frequency Characteristics Compensation

    Application Software: WORD97 (Product Version 8.0) • Setup WILTRON 6769B ML4803A MG443B 3 dB Attenuator Anritsu P OW E R ME TE R ML 4803 A 3 dB Attenuator MA4701A A nritsu P O W E R ME TE R ML4 803A MA4601A Fig.
  • Page 84 Section 3 Adjustment and Calibration • Procedures Frequency compensation requires PC and Compensation software for SIGANA. Execute the aging of SSG1 and Power Meter for more than 24 hours. (1) Installing compensation software to PC Step Procedure Excecute "Setup exe.". Setup window appears.
  • Page 85 3.10 Frequency Characteristics Compensation (3) Calibrating the compensation system Calibrate the compensation system as described below. Follow the instruction of the compensation software for the details. Step Procedure Select System menu → System Calibration. Check the required items on the System Calibration item select window, then press the F2: Select Item.
  • Page 86 Section 3 Adjustment and Calibration (4) Compensation Step Procedure Press F1: Measure on Main window. Check the required items on the Measurement item select window, then press the F2: Select Item. (Items for compensation) Compensate [RF]: Compensates at Band 0. Compensate [Micro]: Compensates at Band 1–,1+,2+,3+,4+.

  • Page 87: Internal Calibration

    3.11 Internal Calibration 3.11 Internal Calibration Perform the calibration with the internal calibration oscillator, as follows: Start the calibration by key operation (Shift+0→All). The Cal status (Cal menu) gives the calibration results on the window. Fig. 3-12 Cal Status display window Cal status window is described below.
  • Page 88 Section 3 Adjustment and Calibration • 05: RF Attenuator 00: Normal If other than 00 is displayed, MM200017A 8 GHZ STEP ATTENUATOR or Switched Attenuator is faulty. • 06: Pre Amp 0: Normal Indicates the calibration results at Pre Amp ON/OFF. If other than 0 is displayed, MM200032A PRE AMP is faulty.

  • Page 89: Installing Software

    3.12 Installing Software 3.12 Installing Software 3.12.1 Installing Core Module Install the Core Module on Install Core Module window, as described below. Step Procedure Select F4: System Install on Configuration window to display Install System window. Select "F5: Core Module install" to display "Install Core Module" window.

  • Page 90: Mechanical Switch Counter Setting

    Section 3 Adjustment and Calibration 3.13 Mechanical Switch Counter Setting The following operations set the Mechanical Switch Counter of MS268*A to zero. Perform this operation after exchanging MM800017A 8 GHz STEP ATTENUATOR or Switched Attenuator. Mechanical → →Maintenance → Counter Config System Parameter...

This manual is also suitable for:

Ms2683aMs2687a

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