3-5 Option 881 WCDMA/HSDPA Signal Analyzer Verification Chapter 3 — Options Verification
3-20 PN: 10580-00342 Rev. D MS2720T MM
HSDPA RF Channel Power Accuracy
The tests in this section can be used to verify the RF Channel Power Accuracy and Adjacent Channel Leakage
Ratio (ACLR) Accuracy for HSDPA signals in WCDMA/HSDPA Signal Analyzer Mode.
Procedure
1. Turn on the MG3700A Vector Signal Generator and the ML2438A power meter.
2. Connect the power sensor to the power meter and zero the sensor.
3. Connect the MG3700A, splitter, attenuator, power meter, and sensor according to
4. Press the On/Off key to turn on the MS2720T, and wait until the measurement display appears. Then
press the Shift key, and then 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 submenu key.
7. On the MG3700A, press the Preset key (Yellow key on the upper-left corner).
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) 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 TestModel_5_8HSPDSCH 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, then enter 2680.5, and press the MHz key.
20. Press the Level key, then enter –2, and press the dBm key.
21. Use the knob to adjust the power meter to read –20 dBm, and record the Power Meter reading in the
“Power Meter Reading” column of Table A-87, “RF Measurements, HSDPA RF Channel Power Accuracy”
on page A-42.
22. On the MS2720T, press the Center Freq submenu key, enter 2680.5, and then press the Enter key.
23. Press the Measurements main menu key, then the RF Measurement submenu key, and press ACLR.
24. Press the Amplitude main menu key, then press the Adjust Range submenu key.
25. Record the measured CH 1 power in dBm to the “Measured RF Channel Power” column of Table A-87.
26. Calculate the RF Channel Power Error using the following formula:
RF Channel Power Error (dB) = Measured RF Channel Power – 0.246 – Power Meter reading
27. Record the calculated value into the “RF Channel Power Error” column in Table A-87 and verify that it is
within specifications (± 1.25 dB).
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