Table Of Contents - Anritsu Spectrum Master MS2721A Maintenance Manual

1. General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.2. Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.3. Recommended Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2. Performance Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.1. Spectrum Analyzer Frequency Accuracy . . . . . . . . . . . . . . . . . . . . . . . . 2
2.2. Spectrum Analyzer Internal Reference Frequency Adjustment . . . . . . . . . . . . . 3
2.3. Spectrum Analyzer Phase Noise Verification . . . . . . . . . . . . . . . . . . . . . . 5
2.4. Spectrum Analyzer Second Harmonic Distortion Test. . . . . . . . . . . . . . . . . . 6
2.5. Spectrum Analyzer Residual Spurious Response Test
2.6. Display Average Noise Level (DANL) . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.7. Input Related Spurious Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.8. Spectrum Analyzer Resolution Bandwidth Accuracy Test . . . . . . . . . . . . . . . 15
2.9. Spectrum Analyzer Measurement Accuracy Verification. . . . . . . . . . . . . . . . 17
3. Battery Pack Removal and Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4. Battery Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5. Real Time Clock Battery Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6. Opening the Spectrum Master Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
7. Main PCB Assembly Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
8. Spectrum Analyzer Module Assembly Replacement . . . . . . . . . . . . . . . . . . . . 30
9. LCD Assembly Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
10. LCD Backlight PCB Removal and Replacement . . . . . . . . . . . . . . . . . . . . . . 32
11. Keypad Membrane and PCB Replacement . . . . . . . . . . . . . . . . . . . . . . . . . 33
12. Function Key Membrane and Switchpad Replacement . . . . . . . . . . . . . . . . . . . 35
13. Accessories and Replaceable Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
14. Appendix A: MS2721A Test Records . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
14.1. Spectrum Analyzer Frequency Accuracy Test . . . . . . . . . . . . . . . . . . . . . 38
14.2. Spectrum Analyzer Phase Noise Verification . . . . . . . . . . . . . . . . . . . . . 38
14.3. Spectrum Analyzer Second Harmonic Distortion Test . . . . . . . . . . . . . . . . . 38
14.4. Spectrum Analyzer Residual Spurious Response Test with Pre-Amp Off . . . . . . . 38
14.5. Spectrum Analyzer Residual Spurious Response Test with Pre-Amp On . . . . . . . 39
14.6. Spectrum Analyzer Display Average Noise Level (DANL) . . . . . . . . . . . . . . . 39
14.7. Spectrum Analyzer Input Related Spurious (IRS) . . . . . . . . . . . . . . . . . . . 39
14.8. Spectrum Analyzer Resolution Bandwidth Accuracy Test . . . . . . . . . . . . . . . 40
14.9. (b) Spectrum Analyzer Level Accuracy Across Frequency Test Setting . . . . . . . . 41
14.10. (c) Spectrum Analyzer Level Accuracy Across Frequency Test Setting . . . . . . . 41
14.11. (e)Spectrum Analyzer Level Accuracy Through Power Test Setting . . . . . . . . . 42
14.12. (f) Spectrum Analyzer Level Accuracy Through Power Test Setting . . . . . . . . . 42
15. Appendix B: MS2721A Case Replacement Instructions (Kit # ND64730) . . . . . . . . . 43
Spectrum Master MM

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