Performance Verification 2 3-9 WCDMA/HSDPA Signal Analyzer (Options 44, 45, and 65) Verification
MS2721B MM PN: 10580-00177 Rev. D 3-47
4. Press the On/Off key to turn on the MS2721B and wait until the measurement display appears, then
press the Shift key and press the Mode (9) key to activate the mode selection menu.
5. Use the Up/Down arrow keys to select WCDMA and press the Enter key.
6. Press the Shift key, the Preset (1) key, and then the Preset soft key.
7. On the MG3700A, press the Preset key (Yellow key on the upper left-hand side).
8. Press the Down Arrow key to select Yes.
9. Press the Set key (Note that two Set keys are available, and they both do the same thing).
10. Press the (F1) soft key to select "Load File to Memory"
11. Press the (F1) soft key again to select "Select Package"
12. Using the Down Arrow key step through the selection list until the "W-CDMA(BS Tx test)" option is
highlighted.
13. Press the Set key.
14. Press the (F6) soft key "Return"
15. Press the Set key.
16. Using the Down Arrow key step through the selection list until the "TestModle_1_16DPCH" option is
highlighted.
17. Press the Set key.
18. Press the MOD On/Off key and verify that the Modulation indicator on the display is On.
19. Press the Frequency key, enter 881.5 MHz, and then press the MHz soft key.
20. Press the Level key, enter –28, and press the dBm soft key.
21. Use the knob to adjust the power level so that Sensor B reads +10 dBm.
22.
Set the MN63A attenuator to 0 dB.
23. Record the Sensor A reading (PMA.10) in Table A-100, “Sensor A and Sensor B Readings Component
Characterization, Option 44” on page A-34. The Sensor A reading should be approximately –20 dBm.
24. Record the Sensor B reading (PMB.10) in Table A-100.
25. Calculate Delta 1 (Δ1), which is the error of the coupler output port deviation from ideal +10 dBm, by
using the following formula:
Δ1 (dBm) = (10 dBm – PMB.10)
26. Record the Δ1 value in Table A-100.
27. Calculate the accurate value of the Sensor A reading for a coupler port output of +10 dBm (PMA.10C) by
using the following formula:
PMA.10C = PMA.10 + Δ1
28. Record the calculated value in Table A-100.
29. Set the MN63A attenuator to 18 dB and record the Sensor A reading (PMA.18) in Table A-100.
30. Calculate the accurate attenuation value (ATT.18) by using the following formula:
ATT.18 = (PMA.10 – PMA.18)
31. Record the calculated value of ATT.18 in Table A-100.
32. Turn off the RF output of the MG3700A.
33. Disconnect the coupler from Sensor B, and connect the coupler to the RF In port on the MS2721B,
referring to Figure 3-15.
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