3-7 GSM/GPRS/EDGE Signal Analyzer (Options 40 and 41) Verification Performance Verification 2
3-36 PN: 10580-00177 Rev. D MS2721B MM
GSM Burst Power, Frequency Error, and Phase Error Tests
Test Procedure:
1. On the MG3700A, press the Preset key (Yellow key on the upper left-hand side).
2. Press the Down Arrow key or turn the knob to select Yes.
3. Press the Set key (Note that two Set keys are available, and they both do the same thing).
4. Press the (F1) soft key to select "Load File to Memory"
5. Press the (F1) soft key again to select "Select Package"
6. Using the Down Arrow key, step through the selection list until the "GSM" option is highlighted.
7. Press the Set key.
8. Press the (F6) soft key "Return"
9. Press the Set key. The "Select Package" box appears. Use the rotary knob to highlight "GSM" and press
the Set key to select.
10. Another File List appears. Use the rotary knob to select "GsmBurst_1slot" and press the Set key to select.
11. Press the MOD On/Off key to turn on the Modulation LED and verify that the "Playing" indicator in the
center of the LCD is flashing.
12. Press the Frequency key, and enter 850 MHz.
13. Press the Level key, enter –10, and press the dBm soft key.
14. Adjust the MG3700A output so that the power meter reads –10 dBm ± 0.2 dB.
15. On the MS2721B, press the Freq function hard key and enter 850 MHz as Center Frequency.
16. Press the Measurements function hard key and press GSM/EDGE Summary (a red dot appears on the
label).
17. For an MS2721B with Option 40 (GSM/GPRS/EDGE RF Measurements), subtract the displayed Burst
Power value from the power meter reading in Step 14. Then record the calculated Burst Power error and
the displayed value of Freq Error in Table A-76, “At 850 MHz, –10 dBm Level, TCH Pattern, Option 40”
on page A-29.
18. For an MS2721B with Option 41 (GSM/GPRS/EDGE Demodulator), record the displayed Phase Err RMS
(deg) in Table A-84, “Phase Err RMS (Deg) at 850 MHz, –10 dBm Level, TCH Pattern, Option 41”
on page A-31.
19. Verify that the measured values in Step 17 and Step 18 are within specifications.
20. On the MG3700A, change the selected signal pattern to "GsmBurst_8slot".
21. Adjust the Level of the MG3700A so that the power meter reads –50 dBm ± 0.2 dB. Then wait 15 seconds
to allow the MS2721B to update its measured results.
22. For an MS2721B with Option 40 (GSM/GPRS/EDGE RF Measurements), subtract the displayed Burst
Power value from the power meter reading in Step 21. Then record the calculated Burst Power error and
the displayed value of Freq Error in Table A-77, “At 850 MHz, –50 dBm Level, TCH ALL Pattern,
Option 40” on page A-29.
23. For an MS2721B with Option 41 (GSM/GPRS/EDGE Demodulator), record the displayed Phase Err RMS
(deg) in Table A-85, “Phase Err RMS (Deg) at 850 MHz, –50 dBm Level, TCH ALL Pattern, Option 41”
on page A-31.
24. Verify that the measured values in Step 22 and Step 23 are within specifications.
25. Change the frequency of the MG3700A to 1800 MHz.
26. On the power meter, press the Sensor key, the Cal Factor soft key, and then the Freq soft key. Use the
keypad to enter 1800 MHz as the input signal frequency, which sets the power meter to the proper power
sensor calibration factor. Press the System key to display the power reading.
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