User's Manual

SECTION 4: FACTORY TEST PROCEDURE
M64450G25-FCCRpt.doc Page 34
Step 8 Calibrate Receiver 2, as follows:
- Connect an RF cable from the Service Monitor's RF Out port to the antenna
port of Receiver 2
- In IPMessage, type the command “receiver = 2” and observe that Receiver 2
is selected
- Set the Service Monitor to measure 12db SINAD
- Reduce signal amplitude on the Service Monitor until 12dB SINAD is reached
- Record the value
- In IPMessage, type the command “12DB SINAD = “ and the recorded value
- Set the Service Monitor to measure SNR
- Increase signal amplitude until reaching a level of 30dB SNR.
- Record the amplitude
- In IPMessage, type the command “30DB S/N = “ and the recorded value
- Increase signal amplitude until reaching 40dB SNR
- Record the amplitude
- In IPMessage, type the command “40DB S/N = “ and the recorded value
- Set the signal amplitude to -40dBm
- In IPMessage, type the command “-40DBM = -40“
Step 9 Test Receiver Calibration, as follows:
- Inject a signal with an amplitude of -95dBm into the Receiver 1 antenna port
- In IPMessage, type the command “noise”. The result must -95 dBM +/- 2.
- Next, inject -105dBM into the receiver and type “noise”. The result must be
-95 dBM +/- 2.
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Result must be within 2dBm. If the noise figure is not within 2dBm of
the injected signal level, return to receiver calibration and recalibrate
the receivers.
- Repeat the tests for the other Receiver
- Record the noise readings on the Tune and Align Data Sheet