3-5 Option 881 WCDMA/HSDPA Signal Analyzer Verification Chapter 3 — Options Verification
3-14 PN: 10580-00342 Rev. D MS2720T MM
10. Press the (F1) submenu key to select “Load File to Memory”
11. Press the (F1) submenu key again to select “Select Package”
12. Using the Down Arrow key, step through the selection list until the WCDMA(BS Tx test) option is
highlighted.
13. Press the Set key.
14. Press the (F6) submenu 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, then press the MHz key.
20. Press the Level key, enter –28, and press the dBm key.
21. Use the knob to adjust the power level so that Sensor B reads +10 dBm.
22. Set the MN63A attenuator to 0dB.
23. Record the Sensor A reading (PMA.10) in Table A-82, “RF Measurements, Sensor A and Sensor B
Readings, Components Characterization” on page A-41. This should be approximately –20 dBm.
24. Record the Sensor B reading (PMB.10) in Table A-82.
25. Calculate Delta 1 (Δ1), which is the error of the coupler output port deviation from ideal + 10 dBm, by
using the following formula:
Delta1 (dBm) = (10dBm–PMB.10)
26. Record the Delta 1 (Δ1) value in Table A-82.
27. Calculate the accurate value of the Sensor A reading for coupler port output of +10 dBm (PMA.10C) by
using the following formula:
PMA.10C = PMA.10 + Δ1
28. Record the calculated value (PMA.10C) in Table A-82.
29. Set the MN63A attenuator to 18 dB, and record the Sensor A reading (PMA.18) in Table A-82.
30. Calculate the accurate attenuation value by using the following formula:
ATT.18 = (PMA.10 – PMA.18)
31. Record the calculated value (ATT.18) in Table A-82.
32. Turn off the RF output of the MG3700A.
33. Disconnect the coupler from Sensor B and connect the coupler to the MS2720T, refer to Figure 3-6
on page 3-15.
34. Set the MN63A attenuator to 0dB.
35. On the MS2720T, press the Center Freq submenu key, enter 881.5, and then press the Enter key.
36. Press the Measurements main menu key, then the RF Measurement submenu key, then the Spectrum
submenu key.
37. On the MG3700A, turn on the RF output and use the knob to adjust power level to read the value of
PMA.10C on Sensor A (refer to Table A-82).
38. Record the MG3700A power level setting (MG3700A.10) in Table A-83, “RF Measurements, Power Level
Setting, Components Characterization” on page A-41.
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