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7
Measure the BER and RSSI:
a. Click Start BER Measurement.
Step result: The Test and Measurement Screen dialog box displays:
With the initial setting of the service monitor set for a carrier level of 50 dBm, you should expect a
BER of 0.0 % and an RSSI level between 48 dBm and 52 dBm. Remember to compensate for the
loss of the cable connecting the service monitor to the base radio.
If the receiver is inhibited, RSSI will display a meaningless value.
b. Click Start Log to create a log file for the BER and RSSI measurement.
Step result: The Log Save As window appears.
c. Change the RF level and read the BER and RSSI again at the level appropriate for the base radio. The
value should be less than 5%. See
1-12
for the appropriate value.
d. Key the transmitter in the base radio and readjust the generator output level until 5% BER is indicated on
the service monitor. Record this level.
Step result: Less than 1 dB of degradation should occur due to the transmitters being keyed.
e. Dekey the transmitter.
f. Click Stop BER Measurement to stop the test.
8
If no further testing is needed, click Change to Normal Mode to return the base radio to normal operation.
Remove and restore the following connections to the base radio:
9
a. Remove the service monitor GEN port connection from the base radio Antenna Port.
b. Restore the Antenna connection to the Receive Antenna Port.
6871022P86-A - November 2012
• BER results in percentage
• RSSI results expressed in dBm.
1.9 GTR 8000 Base Radio/GPW 8000 Receiver Specifications, page
5.10.3 Verifying Receiver Performance (Digital Operation)
5-37
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Table of Contents
Troubleshooting
