Anritsu Spectrum Master MS2721A User manual

Spectrum Master
Model MS2721A
Spectrum Analyzer
MAINTENANCE MANUAL
490 JARVIS DRIVE ·MORGAN HILL, CA 95037-2809 P/N: 10580-00105
REVISION D
PRINTED: JUNE 2006
COPYRIGHT ã2005-2006 ANRITSU CO.

Table of Contents
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 ................8
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 i

1. General
1.1. Introduction
This manual provides maintenance instructions for the Spectrum Master Model MS2721A Spectrum Analyzer. It de-
scribes the product and provides performance verification procedures, parts replacement procedures, and a replaceable
parts list.
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.
Instrument Critical Specification Recommended Manufacturer/Model
Synthesizer Frequency: 2 to 20 GHz
with options 2A, 3, 4, 15A, and 22
Anritsu Model MG3692A
Power Meter Power Range: –70 to + 20 dBm Anritsu Dual Channel Model ML2438A
Power Sensor Frequency: 10 MHz to 18 GHz,
–67 to +20 dB
Anritsu Model MA2442A
Frequency Reference Frequency: 10 MHz Absolute Time Corp., Model 300
Low Pass Filter Frequency: 50 MHz Anritsu Model 1030-96
Fixed Attenuator 10 dB Attenuation Weinschel Model 1-10
Power Splitter Frequency: DC to 18 GHz Weinschel Model 1870A
Adapter Frequency: DC to 20 GHz WSMA(m)-N(f),
50 Ohm
Anritsu Model 34RSN50
50 Ohm Adapter Frequency: DC to 20 GHz K(m)-N(f),
50 Ohm
Anritsu Model 34RKNF50
50 Ohm Termination Frequency: DC to 18 GHz Anritsu Model 28N50-2
RF Coaxial Cable Frequency: DC to 6.0 GHz N(m)-N(f),
50 Ohm
Anritsu Model 15NNF50-1.5C
Coaxial Cable BNC Male to Male 60 Inch, 50 Ohm Pasternack Enterprises Model PE3067-60
Table 1. Recommended Test Equipment
Spectrum Master MM 1

2. Performance Verification
The following sections contain tests that can be used to verify the performance of the Spectrum Master Model
MS2721A.
2.1. Spectrum Analyzer Frequency Accuracy
The following test can be used to verify the CW frequency accuracy of the Spectrum Master.
a. Equipment Required:
·Anritsu MG3692A Synthesized Signal Source with options 2A, 3, 4, 15A, and 22, or equivalent
·10 MHz Reference Standard
·Anritsu 34RSN50 50 ohm adapter or equivalent
·Anritsu Spectrum Master External Power Supply (part number 40-168)
·Anritsu 15NNF50-1.5C RF Coaxial Cable or equivalent
·BNC male to BNC male coaxial cable
b. Procedure:
1. Connect the 10 MHz Reference Standard to the Anritsu MG3692A Synthesized Signal Source and to the Spec-
trum Master.
2. Connect the output of the MG3692A Synthesized Signal Source to the RF In connector of the Spectrum Master.
3. Connect the external power supply (Anritsu part number 40-168) to the Spectrum Master.
4. Press the ON/OFF key to turn on the Spectrum Master.
5. Press the Shift key, the Preset key (1), and then the Preset soft key to reset the instrument to the default starting
conditions.
6. Turn on the 10 MHz Reference Standard and the Anritsu MG3692A Synthesized Signal Source.
NOTE: Before continuing, allow a 30-minute warm up for the internal circuitry to stabilize.
7. Set the MG3692A output to 1 GHz CW, with an RF output level of –30 dBm.
8. Press the Amplitude key and select the Reference Level soft key.
9. Use the keypad to enter –10 and select the dBm soft key.
10. Press the Freq key and select the Center Freq soft key.
11. Use the keypad to enter 1 and select the GHz soft key.
12. Press the Span key, use the keypad to enter 10, and select the kHz soft key.
13. Press the BW key and select the RBW soft key.
14. Use the keypad to enter 100 and select the Hz soft key.
15. Press the VBW soft key and use the keypad to enter 30, then select the Hz soft key.
16. Press the Marker key, and select the Peak Search soft key.
17. Verify that the marker frequency is 1 GHz, ±1 kHz.
18. Repeat steps 7 through 15 for 7 GHz.
19. Verify that the marker frequency is 7 GHz, ±7 kHz.
NOTE: If the unit fails the Spectrum Analyzer Frequency Accuracy test, perform the Internal Reference
Frequency Adjustment procedure in Section 2.2 If the units still fails the Frequency Accuracy test after
the Internal Reference Frequency adjustment has been completed, replace the PCB assembly.
2 Spectrum Master MM

2.2. 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.
a. 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)
·Anritsu 34RSN50 50 Ohm adapter or equivalent
·Anritsu 15NNF50-1.5C RF Coaxial Cable or equivalent
·BNC male to BNC male coaxial cable
b. Procedure
1. Connect the 10 MHz reference source to the Anritsu MG3692A Synthesized Signal Source.
2. Connect the output of the MG3692A Synthesized Signal Source to the RF In connector of the Spectrum Master.
3. Connect the external power supply (Anritsu part number 40-168) to the Spectrum Master.
4. Press the ON/OFF key to turn on the Spectrum Master.
5. Press the Shift key, the Preset key (1), and then the Preset soft key to reset the instrument to the default starting
conditions.
6. Turn on the 10 MHz reference source and the Anritsu MG3692A Synthesized Signal Source.
7. Set the MG3692A output to 7 GHz with an RF output level of –30 dBm.
NOTE: Before continuing, allow a 30-minute warm up for the internal circuitry to stabilize.
8. Press the Amplitude key and select the Reference Level soft key.
9. Use the keypad to enter –10 and select the dBm soft key.
10. Press the Atten Lvl soft key, use the keypad to enter 0 and press the dB soft key.
11. Press the Freq key and select the Center Freq soft key.
12. Use the keypad to enter 7 and select the GHz soft key.
13. Press the Span key, use the keypad to enter 10, and select the kHz soft key.
14. Press the BW key and select the RBW soft key.
15. Use the keypad to enter 100 and select the Hz soft key.
16. Press the VBW soft key and use the keypad to enter 30, then select the Hz soft key.
Spectrum Master MM 3

Press and hold the Shift key and press the 4,6, and 8(from top) soft keys together to enter into the Spectrum Master
Service Mode.
17. Press the Service Menu soft key, then the APP Service soft key.
18. Press the Calibration soft key, the 10 MHz TXCO soft key.
19. Use the Up/Down arrow key or the rotary knob to slowly adjust the displayed signal to the center of the display.
Allow the signal to stabilize between adjustments, and repeat as necessary.
20. Turn the Spectrum Master off, and then back on to exit Service Mode.
4 Spectrum Master MM
Soft Keys
4, 6, and 8
Shift Key
Figure 1. MS2721A Spectrum Master Service Mode Key Sequence

2.3. Spectrum Analyzer Phase Noise Verification
This test can be used to verify the phase noise of the Spectrum Master.
a. 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)
·10 MHz Reference Standard
·Anritsu 34RSN50 50 Ohm adapter or equivalent
·Anritsu 15NNF50-1.5C RF Coaxial Cable or equivalent
b. Procedure:
1. Connect the 10 MHz reference source to the Anritsu MG3692A Synthesized Signal Source.
2. Connect the output of the MG3692A Synthesized Signal Source to the RF In connector of the Spectrum Master.
3. Connect the external power supply (Anritsu part number 40-168) to the Spectrum Master.
4. Press the ON/OFF key to turn on the Spectrum Master.
5. Press the Shift key, the Preset key (1), and then the Preset soft key to reset to the default starting conditions.
6. Turn on the 10 MHz reference source and the Anritsu MG3692A Synthesized Signal Source.
7. Set the MG3692A output to 7.09 GHz CW, with an RF output level of +13 dBm.
NOTE: Before continuing, allow a 30-minute warm up for the internal circuitry to stabilize.
8. Press the Amplitude key and select the Reference Level soft key.
9. Use the keypad to enter 0 and select the dBm soft key.
10. Press the Atten Lvl soft key, use the keypad to enter 15 and press the dB soft key.
11. Press the Freq key and select the Center Freq soft key.
12. Use the keypad to enter 7.090050 and press the GHz soft key.
13. Press the Span key, use the keypad to enter 110, and select the kHz soft key.
14. Press the BW key and select the RBW soft key.
15. Use the keypad to enter 1 and select the kHz soft key.
16. Press the VBW soft key and use the keypad to enter 3, then select the Hz soft key.
17. Press the Shift key and then press the Trace (5) key.
18. Select the Trace A Operations soft key.
19. Press the # of Average soft key, use the keypad to enter 7, then press the Enter soft key.
20. Wait until the Trace Count displays 7/7.
21. Press the Marker key and select the Peak Search soft key
22. Press the Delta On/Off soft key to turn Delta on .
23. Use the keypad to enter 10 and press the kHz soft key, and record D1.
24. Subtract 30 dB from the average value and verify that the result is £–100 dBc/Hz.
(For example: –70 dBc measured – 30 dB = –100 dBc/Hz.)
Spectrum Master MM 5

NOTE: The measured value is converted to dBc/Hz using the following formula:
()
[]
dBc Hz measured dBc RBW
Hz
/log =- - 10 1
At 1 kHz RBW, ()
10 30
1
log
RBW
Hz =,sodBc Hz measured dBc/=- - 30.
25. Repeat steps 15 through 22 for 20 kHz, 30 kHz, and 100 kHz.
2.4. Spectrum Analyzer Second Harmonic Distortion Test
The following test can be used to verify the input related spurious response of the Spectrum Master.
a. 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 (Anritsu part number 40-168)
·Anritsu 34RSN50 50 Ohm adapter or equivalent
·Anritsu 15NNF50-1.5C RF Coaxial Cable or equivalent
·50 MHz Low Pass Filter (Anritsu part number 1030-96)
·BNC male to BNC male coaxial cable
b. Procedure:
1. Connect the 10 MHz reference source to the Anritsu MG3692A Synthesized Signal Source.
2. Connect one end of the 50 MHz Low Pass Filter to the output of the source and the other end to the Spectrum
Master RF In with the coaxial cable.
3. Connect the external power supply (Anritsu part number 40-168) to the Spectrum Master.
4. Press the ON/OFF key to turn on the Spectrum Master.
5. Press the Shift key, the Preset key (1), and then the Preset soft key to reset the instrument to the default starting
conditions.
6. Turn on the 10 MHz reference source and the Anritsu MG3692A Synthesized Signal Source.
7. Set the MG3692A output to 50.1 MHz CW, with an RF output level of –30 dBm.
NOTE: Before continuing, allow a 30-minute warm up for the internal circuitry to stabilize.
8. Press the Amplitude key and select the Reference Level soft key.
9. Use the keypad to enter –27 and press the dBm soft key.
10. Press the Atten Lvl soft key and enter 0, then press the dB soft key.
11. Press the Span key, use the keypad to enter 100, and select the kHz soft key.
12. Press the Shift key and then press the Sweep (3) key.
13. Press the Detection soft key, and then the Peak soft key.
14. Press the BW key and select the RBW soft key.
15. Use the keypad to enter 1 and select the kHz soft key.
16. Press the VBW soft key and use the keypad to enter 10, then select the Hz soft key.
17. Press the Freq key and select the Center Freq soft key.
18. Use the keypad to enter 50.0 and press the MHz soft key.
19. Press the Shift key and then press the Trace (5) key.
20. Select the Trace A Operations soft key.
6 Spectrum Master MM

21. Press the # of Average soft key, use the keypad to enter 5, then press the Enter soft key.
22. Wait until the Trace Count displays 5/5.
23. Press the Marker key and select the Peak Search soft key.
24. Record the amplitude for 50.1 MHz.
25. Press the Freq key and select the Center Freq soft key.
26. Use the keypad to enter 100.2 and press the MHz soft key.
27. Press the Shift key and then press the Trace (5) key.
28. Select the Trace A Operations soft key.
29. Press the # of Average soft key, use the keypad to enter 5, then press the Enter soft key.
30. Wait until the Trace Count displays 5/5.
31. Press the Marker key and select the Peak Search soft key.
32. Record the amplitude for 100.2 MHz.
33. Convert the measured value to dB using the following formula:
Amplitude @50.1 MHz – amplitude @100.2 MHz =______ dBc = Second Harmonic Level @ 100.2 MHz
34. Verify that the converted Second Harmonic Level is –50 dBc or better.
Spectrum Master MM 7

2.5. Spectrum Analyzer Residual Spurious Response Test
The following test can be used to verify the residual spurious response of the Spectrum Master. This test is performed
using the positive peak detection mode. There are two parts to this test:
·Residual Spurious Test with Preamp off
·Residual Spurious Test with Preamp on
Residual Spurious Test with Preamp Off
a. Equipment Required:
·Anritsu 28N50-2, 50 Ohm Termination or equivalent
·Anritsu Spectrum Master External Power Supply (Anritsu part number 40-168)
b. Procedure:
1. Connect the 50 Ohm termination to the Spectrum Master RF In.
2. Connect the external power supply (Anritsu part number 40-168) to the Spectrum Master.
3. Press the ON/OFF key to turn on the Spectrum Master.
4. Press the Shift key, the Preset (1) key, and then the Preset soft key to reset the instrument to the default starting
conditions.
NOTE: Before continuing, allow a 30-minute warm up for the internal circuitry to stabilize.
5. Press the Amplitude key and select the Reference Level soft key.
6. Use the keypad to enter –40 and press the dBm soft key.
7. Press the Atten Lvl soft key and enter 0, then press the dB soft key.
8. Make sure that the Pre Amp On/Off key is in off position. If the preamp is on, press the Pre Amp On/Off soft key
to turn it off.
9. Press the Shift key and then press the Sweep (3) key, then select the Detection and then the Peak soft keys.
10. Press the Freq key and select the Start Freq soft key.
11. Use the keypad to enter 100 and select the kHz soft key.
12. Press Stop Freq soft key, enter 10 and press the MHz soft key.
13. Press the BW key and select the RBW soft key.
14. Use the keypad to enter 3 and select the kHz soft key.
15. Press the VBW soft key and use the keypad to enter 300, then select the Hz soft key.
16. Wait until one sweep is completed.
17. Press the Marker key and select the Peak Search soft key.
18. Record the Marker 1 amplitude reading and verify that it is £–90 dBm.
NOTE: If a spur with amplitude larger than –90 dBm occurs, wait another full sweep and observe
whether the spur occurs at the same point on the second sweep. If the spur does not occur at the
same point on the second sweep, then the spur on the first sweep was not real.
8 Spectrum Master MM

19. Repeat steps 8 through 16 for the other settings in Table 2.
Start Freq. Stop Freq. RBW VBW Measured Values (dBm) Specification
(dBm)
100 kHz 10 MHz 3 kHz 300 Hz – 90
10 MHz 1.0 GHz 30 kHz 1kHz – 90
1 GHz 2.2 GHz 10 kHz 300 Hz – 90
2.2 GHz 2.7 GHz 1 kHz 300 Hz – 90
2.7 GHz 2.8 GHz 1 kHz 100 Hz – 90
2.8 GHz 3.199 GHz 10 kHz 300 Hz – 90
3.2 GHz 4.009 GHz 30 kHz 1 kHz – 84
4.009 GHz 5.083 GHz 10 kHz 300 Hz – 84
5.083 GHz 5.895 GHz 10 kHz 100 Hz – 84
5.895 GHz 7.1 GHz 10 kHz 100 Hz – 84
Table 2. Residual Spurious Test with Preamp Off
Exceptions:
Frequency Spur Level
250, 300, and 350 MHz –85 dBm max
~4010 MHz –80 dBm max
~5084 MHz –70 dBm max
~5894 MHz –75 dBm max
~7028 MHz –80 dBm max
Residual Spurious Test with Preamp On
c. Equipment Required:
·Anritsu 28N50-2, 50 Ohm Termination or equivalent
·Anritsu Spectrum Master External Power Supply (Anritsu part number 40-168)
d. Procedure:
1. Connect the 50 Ohm termination to the Spectrum Master RF In.
2. Connect the external power supply (Anritsu part number 40-168) to the Spectrum Master.
3. Press the ON/OFF key to turn on the Spectrum Master.
4. Press the Shift key, the Preset (1) key, and then the Preset soft key to reset the instrument to the default starting
conditions.
NOTE: Before continuing, allow a 30-minute warm up for the internal circuitry to stabilize.
5. Press the Amplitude key and select the Reference Level soft key.
6. Use the keypad to enter –40 and press the dBm soft key.
7. Press the Atten Lvl soft key and enter 0, then press the dB soft key.
8. Make sure that the Pre Amp On/Off key is in On position. If the preamp is off, press the Pre Amp On/Off soft key
to turn it on.
9. Press the Shift key and then press the Sweep (3) key, then select the Detection and then the Peak soft keys.
10. Press the BW key and select the RBW soft key.
Spectrum Master MM 9

11. Use the keypad to enter 10 and select the kHz soft key.
12. Press the VBW soft key and use the keypad to enter 1, then select the kHz soft key.
13. Press the Freq key and select the Start Freq soft key.
14. Use the keypad to enter 100 and select the kHz soft key.
15. Press Stop Freq soft key, enter 10 and press the MHz soft key.
16. Wait until one sweep is completed.
17. Press the Marker key and select the Peak Search soft key.
18. Record the Marker 1 amplitude reading and verify that it is £–100 dBm.
19. Repeat steps 12 through 17 for the other settings in Table 3.
Start Freq Stop Freq Measured Values (dBm) Specification
(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 5.0 GHz –100
5.0 GHz 6.0 GHz –100
6.0 GHz 7.1 GHz –100
Table 3. Residual Spurious Test with Preamp On
NOTE: If a spur with amplitude larger than –100 dBm occurs, wait another full sweep and observe
whether the spur occurs at the same point on the second sweep. If the spur does not occur at the
same point on the second sweep, then the spur on the first sweep was not real.
10 Spectrum Master MM

2.6. Display Average Noise Level (DANL)
The following test can be used to verify the display average noise level of the Spectrum Master. This test is performed
using the RMS detection mode.
a. Equipment Required:
·Anritsu 28N50-2, 50 Ohm Termination or equivalent
·Anritsu Spectrum Master External Power Supply (Anritsu part number 40-168)
b. Procedure:
1. Connect the 50 Ohm termination to the Spectrum Master RF In.
2. Connect the external power supply (Anritsu part number 40-168) to the Spectrum Master.
3. Press the ON/OFF key to turn on the Spectrum Master.
4. Press the Shift key, the Preset (1) key, and then the Preset soft key to reset the instrument to the default starting
conditions.
NOTE: Before continuing, allow a 30-minute warm up for the internal circuitry to stabilize.
5. Press the Amplitude key and select the Reference Level soft key.
6. Use the keypad to enter –50 and press the dBm soft key.
7. Press the Atten Lvl soft key and enter 0, then press the dB soft key.
8. Make sure that the Pre Amp On/Off key is in the On position. If the preamp is off, press the Pre Amp On/Off soft
key to turn it on.
9. Press the Shift key and then press the Sweep (3) key, then select the Detection and then the RMS soft key.
10. Press the BW key and select the RBW soft key.
11. Use the keypad to enter 100 and select the kHz soft key.
12. Press the Freq key and select the Start Freq soft key.
13. Use the keypad to enter 10 and select the MHz soft key.
14. Press the Stop Freq soft key, enter 1 and press the GHz soft key.
15. Wait until one sweep is completed.
16. Press the Marker key and the Peak Search soft key.
17. Record the Marker reading in the Measured Value column of Table 4.
NOTE: The noise floor consists of totally random signals where a spur is a fixed spike of varying ampli-
tude that is always visible. If Peak Search lands the marker on a spur, the rotary knob can be used to
move the marker to the next peak.
18. Subtract 40 dB from the Measured Value to normalize it for a 10 Hz RBW and record the new value in the Nor-
malized Value column of Table 4. Verify that the normalized value is less than the Specification value.
NOTE: DANL @ 10 Hz RBW = Measured DANL @ 100 kHz – 10log 100
10
kHz
Hz
æ
è
çö
ø
÷
= Measured DANL @ 100 kHz – 40 dB
19. Repeat steps 12 through 18 for the other frequency settings in Table 4.
Spectrum Master MM 11

Frequency Measured Value @ 100 kHz
RBW (dBm)
Normalized Value for 10 Hz
RBW (dBm)
Max DANL in 10
Hz RBW (dBm)
10 MHz to 1.0 GHz –151
1 GHz to 2.2 GHz –149
2.2 GHz to 2.8 GHz –143
2.8 GHz to 4.0 GHz –149
4.0 GHz to 7.1 GHz –144
Table 4. Display Average Noise Level (DANL)
2.7. 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.
a. 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
·Anritsu 34RSN50 50 Ohm adapter or equivalent
·Anritsu 15NNF50-1.5C RF Coaxial Cable or equivalent
·BNC male to BNC male coaxial cable
b. Procedure:
1. Connect the 10 MHz reference source to the Anritsu MG3692A Synthesized Signal Source.
2. Connect the output of the Anritsu MG3692A Synthesized Signal Source to the Spectrum Master RF In.
3. Set the MG3692A output to 1674 MHz, with an RF output level of –30 dBm.
4. Connect the external power supply (Anritsu part number 40-168) to the Spectrum Master.
5. Press the Shift key, the Preset (1) key, and then the Preset soft key to reset the instrument to the default starting
conditions.
NOTE: Before continuing, allow a 30-minute warm up for the internal circuitry to stabilize.
Checking Input Spurs Related to 1674 MHz
6. Press the Amplitude key and select the Reference Level soft key.
7. Use the keypad to enter –27 and press the dBm soft key.
8. Press the Atten Lvl soft key and enter 0, then press the dB soft key.
9. Press the Shift key and then press the Sweep (3) key, then select the Detection and then the Peak soft key.
10. Press the Freq key and select the Center Freq soft key.
11. Use the keypad to enter 1674 and select the MHz soft key.
12. Press the Span key, use the keypad to enter 2, and select the MHz soft key.
13. Press the BW key and select the RBW soft key.
14. Use the keypad to enter 10 and select the kHz soft key.
15. Press the VBW soft key and use the keypad to enter 1, then select the kHz soft key.
16. Wait until one sweep is completed.
17. Press the Marker key and select the Peak Search soft key.
12 Spectrum Master MM

18. Record the Marker 1 amplitude reading for 1674 MHz.
19. Press the Freq key and select the Start Freq soft key.
20. Use the keypad to enter 100 and select the kHz soft key.
21. Press Stop Freq soft key, enter 1673 and press the MHz soft key.
22. Press the Marker key and select the Peak Search soft key.
23. Record the Marker 1 amplitude reading.
24. Calculate the input related spurious level and verify that it is £–46 dBc:
(Input Related Spurious = Marker 1 reading – amplitude reading for 1674 MHz)
25. Repeat steps 19 through 23. Set a start frequency of 1675 MHz and a stop frequency of 2800 MHz.
Checking Input Spurs Related to 1701 MHz
26. Set the MG3692A output to 1701 MHz, with an RF output level of –30 dBm.
27. On the Spectrum Master, press the Amplitude key and select the Reference Level soft key.
28. Use the keypad to enter –27 and press the dBm soft key.
29. Press the Freq key and select the Center Freq soft key.
30. Use the keypad to enter 1701 and select the MHz soft key.
31. Press the Span key, use the keypad to enter 2, and select the MHz soft key.
32. Press the Shift key and then press the Trace (5) key.
33. Select the Trace A Operations soft key.
34. Press the # of Average soft key, use the keypad to enter 5, then press the Enter soft key.
35. Wait until the Trace Count displays 5/5.
36. Press the Marker key and select the Peak Search soft key.
37. Record the amplitude at 1701 MHz.
38. Press the Freq key and select the Start Freq soft key.
39. Use the keypad to enter 26 and select the MHz soft key.
40. Press Stop Freq soft key, enter 28 and press the MHz soft key.
41. Press the Shift key and then press the Trace (5) key.
42. Select the Trace A Operations soft key.
43. Press the # of Average soft key, use the keypad to enter 5, then press the Enter soft key.
44. Wait until the Trace Count displays 5/5.
45. Press the Marker key and select the Peak Search soft key.
46. Record the Marker 1 amplitude reading.
47. Calculate the input related spurious level and verify that it is £–50 dBc.
Checking Input Spurs Related to 2145 MHz
48. Set the MG3692A output to 2145 MHz, with an RF output level of –30 dBm.
49. On the Spectrum Master, press the Amplitude key and select the Reference Level soft key.
50. Use the keypad to enter –27 and press the dBm soft key.
51. Press the Freq key and select the Center Freq soft key.
52. Use the keypad to enter 2145 and select the MHz soft key.
53. Press the Span key, use the keypad to enter 2, and select the MHz soft key.
Spectrum Master MM 13

54. Press the Shift key and then press the Trace (5) key.
55. Select the Trace A Operations soft key.
56. Press the # of Average soft key, use the keypad to enter 5, then press the Enter soft key.
57. Wait until the Trace Count displays 5/5.
58. Press the Marker key and select the Peak Search soft key.
59. Record the amplitude at 2145 MHz.
60. Press the Freq key and select the Start Freq soft key.
61. Use the keypad to enter 470 and select the MHz soft key.
62. Press Stop Freq soft key, enter 472 and press the MHz soft key.
63. Press the Shift key and then press the Trace (5) key.
64. Select the Trace A Operations soft key.
65. Press the # of Average soft key, use the keypad to enter 5, then press the Enter soft key.
66. Wait until the Trace Count displays 5/5.
67. Press the Marker key and select the Peak Search soft key.
68. Record the Marker 1 amplitude reading.
69. Calculate the input related spurious level and verify that it is £–60 dBc.
14 Spectrum Master MM

2.8. 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.
a. 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
·Anritsu 34RSN50 50 Ohm adapter or equivalent
·Anritsu 15NNF50-1.5C RF Coaxial Cable or equivalent
·BNC male to BNC male coaxial cable
b. Procedure:
1. Connect the 10 MHz reference source to the Anritsu MG3692A Synthesized Signal Source.
2. Connect the output of the Anritsu MG3692A Synthesized Signal Source to the Spectrum Master RF In.
3. Connect the external power supply (Anritsu part number 40-168) to the Spectrum Master.
4. Press the Shift key, the Preset (1) key, and then the Preset soft key to reset the instrument to the default starting
conditions.
NOTE: Before continuing, allow a 30-minute warm up for the internal circuitry to stabilize.
5. Set the MG3692A output to 1 GHz, with an RF output level of –30 dBm.
6. Press the Amplitude key and select the Reference Level soft key.
7. Use the keypad to enter –10 and press the dBm soft key.
8. Press the Atten Lvl soft key and enter 0, then press the dB soft key.
9. Press the Scale soft key and enter 10, then press dB/div soft key.
10. Press the Freq key and select the Center Freq soft key.
11. Use the keypad to enter 1 and select the GHz soft key.
RBW Test
12. Press the Span key, use the keypad to enter the span according to Table 5 below.
13. Press the BW key and select the RBW soft key.
14. Use the keypad to enter 3 and select the MHz soft key.
15. Set the VBW according to Table 5 below.
16. Press the Shift key then Measure (4) key, then press the OCC BW soft key.
17. Press the dBc soft key and enter 3, then press the Enter key.
18. Press the OCC BW On/Off soft key to turn on occupied bandwidth.
19. Record the OCC BW reading in Table 5 below.
20. Verify that the OCC BW reading frequency is ±10% of the RBW.
Spectrum Master MM 15

21. Repeat steps 12 through 20 for other settings in Table 5.
RBW
Setting Span VBW Lower Limit Measured Values Upper 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 330 KHz
100 KHz 150 kHz Auto 90 KHz 110 KHz
30 kHz 45 kHz Auto 27 kHz 33 kHz
10 kHz 15 kHz Auto 9 kHz 11 kHz
3 kHz 4.5 kHz Auto 2.7 kHz 3.3 kHz
1 kHz 2 kHz Auto .9 kHz 1.1 kHz
300 Hz 450 Hz Auto 270 Hz 330 Hz
100 Hz 150 Hz Auto 90 Hz 110 Hz
30 Hz 50 Hz 3 Hz 27 Hz 33 Hz
10 Hz 30 Hz 3 Hz 9 Hz 11 Hz
Table 5. RBW Accuracy Test
16 Spectrum Master MM