Chapter 3 — Options Verification 3-9 Option 884, CDMA Signal Analyzer Verification
MS2720T MM PN: 10580-00342 Rev. D 3-35
Set up Procedure
1. Zero the power sensor prior to connecting it to the power splitter.
2. Set the Power Meter Measurement MODE to True RMS, set Averaging MODE to Moving, and set
Averaging NUMBER to 256.
3. Connect the equipment as shown in Figure 3-11.
4. On the power meter, press the Sensor key, the Cal Factor submenu key, and then the Freq submenu key.
Use the keypad to enter 870.03 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.
5. Set the MS2720T mode to CDMA Signal Analyzer. Preset the instrument.
cdmaOne Channel Power, Frequency Error, Rho and Tau Tests
Test Procedure
1. On the MG3700A, press the Preset key (Yellow key on the upper-left corner).
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) submenu key to select “Load File to Memory”.
5. Press the (F1) submenu key again to select “Select Package”.
6. Using the Down Arrow key, step through the selection list until the CDMA2000 option is highlighted.
7. Press the Set key.
8. Press the (F6) submenu key Return.
9. Press the Set key. The “Select Package” box is displayed. Use the rotary knob to highlight CDMA2000 and
press the Set key to select.
10. Another File List is displayed. Use the rotary knob to select FWD_RC1-2_9channel and press the Set key
to select.
11. Press the MOD On/Off key to turn the Modulation LED On and verify that the “Playing” indicator in the
center of the LCD is flashing.
12. Press the Frequency key, enter 870.03 MHz.
13. Press the Level key, enter –30, and press the dBm key.
14. Adjust the MG3700A output so that the power meter reads –30 dBm ± 0.2 dB. Record the adjusted
“Power Meter Reading” into Table A-95, “RF Measurements, At 870.03 MHz, –30 dBm Level, cdmaOne”
on page A-49.
15. On the MS2720T, press the Freq main menu key and enter 870.03 MHz as Center Freq.
16. Press the Measurements main menu key and press CDMA Summary (a red dot is displayed on the label).
17. Press the Setup main menu key and press PN Setup. Then change PN Trigger to Ext by pressing the
PN Trigger submenu key twice. Wait 15 seconds to allow the MS2720T to update its measured results.
18. Record the “Channel Power Value” into Table A-95, and subtract the displayed “Channel Power Value”
from the adjusted “Power Meter Reading” in Step 14. Then record the calculated “Channel Power Error”
into Table A-95.
19. Record the displayed Freq Error, Rho, and Tau into Table A-99, “Demodulation, At 870.03 MHz,
–30 dBm Level, cdmaOne” on page A-50.
20. Verify that the measured values in Step 18 and Step 19 are within specifications.
21. On the power meter, press the Sensor key, the Cal Factor submenu key, and then the Freq submenu key.
Use the keypad to enter 1930 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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