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4. Place the cursor in the RF Zone and configure
the analyzer in Generate mode as shown in the
example below:
5. Select the desired frequency that matches the
radio under test; 806.0625 MHz is used in this
example.
6. Configure the radio under test to the BER Test
mode. Consult your radio maintenance manual
for specific instructions.
7. Monitor the radio's received BER. Reduce the
analyzer's output level until the radio measures
a BER corresponding to the sensitivity
threshold.
Consult your radio maintenance
manual for the receiver sensitivity specification.
22-5 BER TESTING THE RADIO
TRANSMITTER (Monitor Mode)
This application example describes the transmitter
test for radios that have BER test capability. The
transmitter must have the capability of transmitting
an unencrypted 1011 Hz Tone Test Pattern.
Performance of this test requires the analyzer to
operate in monitor mode, while monitoring a test
signal transmitted by the radio under test.
When testing the transmitter, the radio generates a
test signal. The analyzer measures the transmitted
BER, frequency error, and power level of the signal
transmitted by the radio.
Consult the radio maintenance manual, as
specific test frequencies may be specified for BER
test of your equipment.
1. Connect the RF input/output of the radio under
test to the RF I/O port of the analyzer as shown
in Figure 21-4. Consult the radio maintenance
manual to determine the appropriate test port.
2. Place the cursor within the Audio Zone and
place the cursor on the "Code:" field; select the
1011 HZ PATTERN softkey.
3. Place the cursor in the RF Zone and configure
the analyzer in Monitor mode as shown in the
example below:
4. Select the desired frequency that matches the
radio under test; 806.0625 MHz is used in this
example.
5. Configure the radio under test to transmit a
1011 Hz Tone Test Pattern. Consult your radio
maintenance manual for specific instructions.
6. Turn on the transmitter of the radio. Consult
your radio maintenance manual for instructions.
7. Access the BER Meter by placing the cursor in
the Display Zone's "Meter:" field and pressing
the more softkey until the BER softkey is
presented.
Select BER via the softkey to
display the BER Meter. A screen similar to
Figure 22-2 appears.
8. BER measurements will be terminated at the
end of transmission or when switching out of
Monitor Mode.
284
NOTE
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