Error Vector Magnitude (Evm) Verification (Option 45 Or Option 65) - Anritsu Spectrum Master MS2722C Maintenance Manual

3-5 Option 44, 45, and/or 65 WCDMA/HSDPA Signal Analyzer VerificationChapter 3 — Options Verification
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
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
within specifications (± 1.25 dB).
28. Record all four measured Adjacent Channel Leakage Ratios in dB at –10 MHz Offset, –5 MHz Offset,
5 MHz Offset, and 10 MHz Offset in the "Measured ACLR" column of
ACLR Accuracy" on page A-44.
29. Calculate the ACLR Error at –10 MHz Offset and 10 MHz Offset using the following formula:
ACLR Error at –10 or 10 MHz Offset = 10 LOG
30. Record in the calculated results to the corresponding cells in the "Calculated ACLR Error" column of
Table A-96 and verify that it is within specification.
31. Calculate the ACLR Error at –5 MHz Offset and +5 MHz Offset by using the following formula:
ACLR Error at –5 or 5 MHz Offset = 10 LOG
32. Record in the calculated results to the corresponding cells in the "Calculated ACLR Error" column of
Table A-96 and verify that it is within specification.

Error Vector Magnitude (EVM) Verification (Option 45 or Option 65)

The tests in this section can be used to verify the functionality of the WCDMA Demodulator or the HSDPA
Demodulator (or both) of the WCDMA/HSDPA Signal Analyzer in the MS272xC Spectrum Master.
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 as shown in
4. Press the On/Off key to turn on the MS272xC, 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_4_opt option is
highlighted.
17. Press the Set key.
3-22
(–50/10)
(10
10
(–45/10)
(10
10
PN: 10580-00279 Rev. E
Table A-94
Table A-96, "Option 44, HSDPA
(Measured_ ACLR/10)
+ 10
(Measured_ACLR/10)
+ 10 ) – (–45) dB
Figure
Table A-94.
and verify that it is
) – (–50) dB
3-6.
MS272xC MM