Anritsu Spectrum Master MS2721A Maintenance Manual
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Anritsu Spectrum Master MS2721A Maintenance Manual

Spectrum analyzer
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Spectrum Master
Model MS2721A
Spectrum Analyzer
MAINTENANCE MANUAL
P/N: 10580-00105
490 JARVIS DRIVE · MORGAN HILL, CA 95037-2809
REVISION D
PRINTED: JUNE 2006
COPYRIGHT ã 2005-2006 ANRITSU CO.

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  • Page 1 Spectrum Master Model MS2721A Spectrum Analyzer MAINTENANCE MANUAL P/N: 10580-00105 490 JARVIS DRIVE · MORGAN HILL, CA 95037-2809 REVISION D PRINTED: JUNE 2006 COPYRIGHT ã 2005-2006 ANRITSU CO.

  • Page 3: Table Of Contents

    Table of Contents General ..........1 1.1.

  • Page 5: General

    1.2. Description The Spectrum Master MS2721A is a synthesizer-based handheld spectrum analyzer. 1.3. Recommended Test Equipment The following test equipment is recommended for use in testing and maintaining the Spectrum Master.

  • Page 6: Performance Verification

    · BNC male to BNC male coaxial cable Procedure: 1. Connect the 10 MHz Reference Standard to the Anritsu MG3692A Synthesized Signal Source and to the Spec- trum Master. Connect the output of the MG3692A Synthesized Signal Source to the connector of the Spectrum Master.

  • Page 7: Spectrum Analyzer Internal Reference Frequency Adjustment

    Use this procedure to adjust the frequency if the unit fails the Spectrum Analyzer Frequency Accuracy verification test in Section 2.1. Equipment Required: · Anritsu MG3692A Synthesized Signal Source, with options 2A, 3, 4, 15A, and 22, or equivalent · 10 MHz Reference Standard · Anritsu Spectrum Master External Power Supply (part number 40-168) ·...
  • Page 8 Press and hold the key and press the , and (from top) soft keys together to enter into the Spectrum Master Shift Service Mode. Shift Key Soft Keys 4, 6, and 8 Figure 1. MS2721A Spectrum Master Service Mode Key Sequence 17.

  • Page 9: Spectrum Analyzer Phase Noise Verification

    This test can be used to verify the phase noise of the Spectrum Master. Equipment Required: · Anritsu MG3692A Synthesized Signal Source, with options 2A, 3, 4, 15A, and 22, or equivalent · Anritsu Spectrum Master External Power Supply (part number 40-168) ·...

  • Page 10: Spectrum Analyzer Second Harmonic Distortion Test

    The following test can be used to verify the input related spurious response of the Spectrum Master. Equipment Required: · Anritsu MG3692A Synthesized Signal Source with options 2A, 3, 4, 15A, and 22, or equivalent · 10 MHz Reference Standard ·...
  • Page 11 21. Press the soft key, use the keypad to enter 5, then press the soft key. # of Average Enter 22. Wait until the displays 5/5. Trace Count 23. Press the key and select the soft key. Marker Peak Search 24.

  • Page 12: Spectrum Analyzer Residual Spurious Response Test

    · Anritsu Spectrum Master External Power Supply (Anritsu part number 40-168) Procedure: 1. Connect the 50 Ohm termination to the Spectrum Master RF In Connect the external power supply (Anritsu part number 40-168) to the Spectrum Master. Press the key to turn on the Spectrum Master. ON/OFF...
  • Page 13 · Anritsu Spectrum Master External Power Supply (Anritsu part number 40-168) Procedure: Connect the 50 Ohm termination to the Spectrum Master RF In Connect the external power supply (Anritsu part number 40-168) to the Spectrum Master. Press the key to turn on the Spectrum Master. ON/OFF...
  • Page 14 11. Use the keypad to enter 10 and select the soft key. 12. Press the soft key and use the keypad to enter 1, then select the soft key. 13. Press the key and select the soft key. Freq Start Freq 14.

  • Page 15: Display Average Noise Level (Danl)

    · Anritsu Spectrum Master External Power Supply (Anritsu part number 40-168) Procedure: Connect the 50 Ohm termination to the Spectrum Master RF In Connect the external power supply (Anritsu part number 40-168) to the Spectrum Master. Press the key to turn on the Spectrum Master. ON/OFF...

  • Page 16: Input Related Spurious Signals

    The following test can be used to verify the input related spurious signals of the Spectrum Master at different frequen- cies. Equipment Required: · Anritsu MG3692A Synthesized Signal Source with options 2A, 3, 4 and 15, or equivalent · Anritsu Spectrum Master External Power Supply (Anritsu part number 40-168) · 10 MHz Reference Standard ·...
  • Page 17 18. Record the Marker 1 amplitude reading for 1674 MHz. 19. Press the key and select the soft key. Freq Start Freq 20. Use the keypad to enter 100 and select the soft key. 21. Press soft key, enter 1673 and press the soft key.
  • Page 18 54. Press the key and then press the (5) key. Shift Trace 55. Select the soft key. Trace A Operations 56. Press the soft key, use the keypad to enter 5, then press the soft key. # of Average Enter 57.

  • Page 19: Spectrum Analyzer Resolution Bandwidth Accuracy Test

    The following test can be used to verify the resolution bandwidth accuracy of the Spectrum Master at different frequen- cies. Equipment Required: · Anritsu MG3692A Synthesized Signal Source with options 2A, 3, 4, 15A, and 22, or equivalent · Anritsu Spectrum Master External Power Supply (Anritsu part number 40-168) · 10 MHz Reference Standard ·...
  • Page 20 21. Repeat steps 12 through 20 for other settings in Table 5. Lower Upper Span Measured Values Setting Limit Limit 3 MHz 4.5 MHz Auto 2.7 MHz 3.3 MHz 1 MHz 1.5 MHz Auto 900 kHz 1.1 MHz 300 KHz 450 kHz Auto 270 KHz...

  • Page 21: Spectrum Analyzer Measurement Accuracy Verification

    Level Accuracy across Frequency Test Equipment Required: · Anritsu MG3692A Synthesized Signal Source with options 2A, 3, 4, 15A, and 22, or equivalent · Anritsu ML2438A Dual Channel Power Meter or equivalent · Anritsu MA2442A High Accuracy Power Sensors or equivalent (2) ·...
  • Page 22 34RSN50 F r e q u e n c y C l e a r B a c k E n t r y S p a c e ADAPTER L e v e l O u t p u t M o d u l a t i o n O n O f f S y s t e m...
  • Page 23 ATTENUATOR 34NN50A 34RSN50 ADAPTER ADAPTER Figure 3. Frequency Level Accuracy Test Setup Connect the external power supply (Anritsu part number 40-168) to the Spectrum Master. Press the key to turn on the Spectrum Master. ON/OFF Press the key, the (1) key, and then the...
  • Page 24 17. Press the key and select the soft key. Marker Peak Search 18. Record the Marker 1 amplitude reading in Table 7. 19. Verify that the Marker 1 amplitude reading is within the specification shown in Table 7. 20. Repeat steps 12 to 19 for the other frequencies in column 1 of Table 7. 21.
  • Page 25 Level Accuracy vs Input Power Level Test Equipment Required: · Anritsu MG3692A Synthesized Signal Source with options 2A, 3, 4, 15A, and 22, or equivalent · Anritsu ML2438A Dual Channel Power Meter or equivalent · Anritsu MA2442A High Accuracy Power Sensor or equivalent (2) ·...
  • Page 26 Sensor Set the MG3692A output to 50 MHz CW. Connect the external power supply (Anritsu part number 40-168) to the Spectrum Master. On the Spectrum Master, press the key, the (1) key, and then the...
  • Page 27 15. Adjust the source power so that the power meter displays the corresponding desired Sensor B reading as re- corded for 0 dBm in column 2 of Table 8. 16. Press the key and select the soft key. Marker Peak Search 17.

  • Page 28: Battery Pack Removal And Replacement

    3. Battery Pack Removal and Replacement This procedure provides instructions for removing and replacing the Spectrum Master battery pack. 1. With the Spectrum Master laying flat, face up, on a stable surface, locate the battery access door (Figure 4). BATTERY DOOR Figure 4.
  • Page 29 4. With the battery access door completely removed, grasp the battery lanyard and pull the battery straight out of the unit, as illustrated in Figure 7. Figure 7. Removing the Battery 5. Replacement is the opposite of removal. Note the orientation of the battery contacts, and be sure to insert the new battery with the contacts facing the bottom of the unit (Figure 8).

  • Page 30: Battery Information

    · Use only Anritsu approved battery packs. · Recharge the battery only in the Spectrum Master or in an Anritsu approved charger. · When the Spectrum Master or the charger is not in use, disconnect it from the power source.

  • Page 31: Opening The Spectrum Master Case

    6. Opening the Spectrum Master Case This procedure provides instructions for opening the Spectrum Master case. With the case opened, the internal assem- blies can be removed and replaced, as detailed in the following sections. 1. Place the Spectrum Master face down on a stable work surface. 2.
  • Page 32 J3000 EXT TRIG IN EXT REF IN J3007 100M SPA 37.8M IN Figure 10. Front Panel Assembly Removal and Cable Connections NOTE: Proper routing of the cables is important for instrument performance. Note the cable routing as illustrated in the drawing below. EXTERNAL TRIGGER CABLE FROM...

  • Page 33: Main Pcb Assembly Replacement

    7. Main PCB Assembly Replacement This procedure provides instructions for replacing the Main PCB assembly. The Main PCB assembly is located in the front panel half of the instrument. NOTE: The Main PCB assembly and the Spectrum Analyzer module are always replaced as a set. 1.

  • Page 34: Spectrum Analyzer Module Assembly Replacement

    8. Spectrum Analyzer Module Assembly Replacement This procedure provides instructions for removing and replacing the Spectrum Analyzer Module. The Spectrum Ana- lyzer Module Assembly is located in the back half of the case and includes the connector panel. NOTE: The Main PCB assembly and the Spectrum Analyzer module are always replaced as a set. 1.

  • Page 35: Lcd Assembly Replacement

    9. LCD Assembly Replacement This procedure provides instructions for removing and replacing the Liquid Crystal Display (LCD) once the Main PCB assembly has been separated from the Spectrum Master. 1. Open the Spectrum Master case as detailed in Section 6. 2.

  • Page 36: Lcd Backlight Pcb Removal And Replacement

    10. LCD Backlight PCB Removal and Replacement This procedure provides instruction for removing and replacing the Spectrum Master LCD backlight PCB. 1. Open the Spectrum Master case as detailed in Section 6. 2. Remove the Main PCB assembly from the front panel as directed in Section 7. 3.

  • Page 37: Keypad Membrane And Pcb Replacement

    11. Keypad Membrane and PCB Replacement This procedure provides instructions for removing and replacing the keypad membrane and PCB. NOTE: The keypad PCBs and membranes can be replaced without opening the Spectrum Master case. 1. Place the instrument face up on a protected work surface. 2.
  • Page 38 NOTE: The speaker is held in place by four locating pins on the inside of the keypad bezel. When the keypad bezel is removed, the speaker is held only by the fragile connecting wires. Use care not to damage the speaker wires when removing or replacing the keypad membrane or PCB. 4.

  • Page 39: Function Key Membrane And Switchpad Replacement

    12. Function Key Membrane and Switchpad Replacement This procedure provides instructions for replacing the function key membrane and switchpad. NOTE: The function key PCB and membrane can be replaced without opening the Spectrum Master case. 1. Place the instrument face up on a protected work surface. 2.

  • Page 40: Accessories And Replaceable Parts

    13. Accessories and Replaceable Parts Accessories and replaceable parts for the Spectrum Master MS2721A are listed below. Accessories Part Number Description 10580-00103 User’s Guide, Spectrum Master MS2721A 10580-00104 Programming Manual, Spectrum Master MS2721A (disk only) 2300-498 Handheld Software Tools CD...
  • Page 41 Hardware Part Number Description 905-2639P Screw, Pan, M3 x 6, Phillips, SS, PCH 905-2642P Screw, Pan, M3 x 12, Phillips, SS, PCHL 905-2633P Screw, Pan, M2 x 6, Phillips, SS, PCHL 905-2663 M3 x 0.5 KEP Nut 905-2684P Screw, M2 x 14 MM, 18-8 SS 905-2685 Screw, 4 MM, Phillips, SS, Shoulder 410-101...

  • Page 42: Appendix A: Ms2721A Test Records

    14. Appendix A: MS2721A Test Records The following sections contain test records that can be used to record the performance of the Spectrum Master Model MS2721A. 14.1. Spectrum Analyzer Frequency Accuracy Test Frequency Measured Value Specification 1 GHz ±1 KHz 7 GHz ±7 KHz 14.2.

  • Page 43: Spectrum Analyzer Residual Spurious Response Test With Pre-Amp On

    14.5. Spectrum Analyzer Residual Spurious Response Test with Pre-Amp On Specification Start Freq Stop Freq Measured Values (dBm) (dBm) 100 KHz 10 MHz –100 10 MHz 1.0 GHz –100 1.0 GHz 2.0 GHz –100 2.0 GHz 3.0 GHz –100 3.0 GHz 4.0 GHz –100 4.0 GHz...

  • Page 44: Spectrum Analyzer Resolution Bandwidth Accuracy Test

    Amplitude Reading at 1701 MHz: Specification Frequency Measured Values (dBm) Calculated IRS (dBc) (dBc) 26 MHz - –50 28 MHz Amplitude Reading at 2145 MHz: Specification Frequency Measured Values (dBm) Calculated IRS (dBc) (dBc) 470 MHz - –60 472 MHz 14.8.

  • Page 45: B) Spectrum Analyzer Level Accuracy Across Frequency Test Setting

    14.9. (b) Spectrum Analyzer Level Accuracy Across Frequency Test Setting Freq Desired Sensor B Reading for –2 dBm Desired Sensor B Reading for –30 dBm (MHz) @ Attenuator Output @ Attenuator Output 1000 2000 3000 4000 5000 6000 7000 14.10. (c) Spectrum Analyzer Level Accuracy Across Frequency Test Setting –2 dBm Input –30 dBm Input Spec.

  • Page 46: E)Spectrum Analyzer Level Accuracy Through Power Test Setting

    14.11. (e)Spectrum Analyzer Level Accuracy Through Power Test Setting Test Power Level (dBm) Desired Sensor B Reading @ 50 MHz –4 –10 –14 –20 –24 –30 –34 –40 –44 –50 14.12. (f) Spectrum Analyzer Level Accuracy Through Power Test Setting Input Reference Power...

  • Page 47: Appendix B: Ms2721A Case Replacement Instructions (Kit # Nd64730)

    14. Plug in the Fan, Battery and Encoder Knob harnesses into the Mother Board. Temporarily install the battery pack and power on the unit and observe weather or not the Anritsu logo appears on the screen. This will verify that the keypad connection header was properly fitted. After verification, turn unit off and remove the battery pack.
  • Page 48 19. Place the Spectrum Analyzer Module into the bottom half of the new poly case. Make sure the panel is prop- erly aligned into the case grooves and then fully tighten the screw left loose in the previous step. Using five new screws, install them into there original locations, leaving the bottom right screw empty.
  • Page 49 Table 1. Anritsu Service Centers UNITED STATES FRANCE KOREA ANRITSU COMPANY ANRITSU S.A ANRITSU CORPORATION LTD. 490 Jarvis Drive 9 Avenue du Quebec Service Center: Morgan Hill, CA 95037-2809 Zone de Courtaboeuf 8F Hyunjuk Building Telephone: (408) 776-8300 91951 Les Ulis Cedex...
  • Page 50 NOTES...

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