Residual Evm And Frequency Error (10 Mhz Bandwidth And 10 Ms Frame Length) - Anritsu Spectrum Master MS2723B Maintenance Manual

2-12 Mobile WiMAX Residual EVM and Frequency Error Tests (Option 67)

Residual EVM and Frequency Error (10 MHz Bandwidth and 10 ms Frame Length)

3. Set the MG3700A as follows:
a. Press the yellow Preset button (answer yes to the question).
b. Press the Set key
c. Press the (F1) soft key to select "Load File to Memory".
d. Press the (F1) soft key again to select "Select Package".
e. Using the Down Arrow key, step through the selection list until "mWiMAX" is highlighted.
f. Press the Set key.
g. Press the (F6) soft key, Return.
h. Press the Set key. The "Select Package" list box is displayed. Again select "mWiMAX" and press
Set.
i. Another file list is displayed. Select (highlight) "10m1024g8_0_10_cap".
j. Press the Set key.
k. Press the MOD On/Off key and verify that the LED is On. Ensure that the "playing" indicator is
displaying the moving pattern.
l. Press the Frequency key, then enter 2600.5 MHz.
m. Press the Level key, then enter –15 dBm. Turn the output On.
4. Set the MS272xB to Mobile WiMAX Signal Analyzer Mode and preset the instrument.
5. Set the MS272xB as follows:
a. Press the Freq soft key and set the Center Freq to 2600.5 MHz.
b. Press the Setup soft key and set the Bandwidth to 10 MHz.
c. Press the CP Ratio soft key (under the Setup soft key) and set the CP Ratio to 1/8.
d. Press the Frame Length soft key and set the Frame Length to 10 ms.
e. Press the Demod soft key and set Demod to FCH.
f. Press the Measurements soft key and press Demodulator, then press Modulation Summary.
6. Record the MS272xB EVM (rms) reading into the "EVM (rms)" column in
Residual EVM (10 MHz Bandwidth and 10 ms Frame Length)" on page
7. Verify that the measured EVM is within specification.
8. Set the MG3700A Level to –50.0 dBm.
9. Record the MS272xB EVM (rms) reading into the "EVM (rms)" column in
10. Verify that the measured EVM is within specification.
11. On the MS272xB, press the Setup soft key, and set Demod to Auto.
12. Record the MS272xB frequency error reading to the "Frequency Error" column in
WiMAX Frequency Error (10 MHz Bandwidth and 10 ms Frame Length)" on page
13. Verify that the measured Frequency Error is within specification.
14. Set MG3700A Frequency to 3600.5 MHz.
15. On the MS272xB, change the Center Frequency to 3600.5 MHz.
16. Press the Setup soft key and set Demod to FCH.
17. Measure the EVM(rms) for both –15 dBm and –50 dBm, and then record the measured results into
Table A-105.
18. Verify that the measured EVM is within specification.
2-76 PN: 10580-00165 Rev. D
Performance Verification
Table A-105, "Mobile WiMAX
A-38.
Table A-105.
Table A-106, "Mobile
A-38.
Models MS2723B and MS2724B MM