5.10.8 Verifying Transmitter Performance (Analog Operation)
8
Click
Start Pattern Transmission
.
Step result:
The service monitor displays:
• The test pattern on the modulation scope.
• The amount of deviation of the carrier.
• The Modulation Fidelity as a percentage.
• The transmitters carrier frequency error.
Figure 5-22
Configuration for Modulation Fidelity Measurement (Aeroflex 2975 Series
Service Monitor)
9
Record the
NAC
,
TGID
, and
SID
readings from the P25 Uplink Data (in the Options menu) for use in digital
Receiver Testing.
10
Click
Stop Pattern Transmission
to turn off the test tone.
11
Disconnect the service monitor and reconnect the transmit antenna.
12
If no further testing is needed, click
Change to Normal Mode
to return the base radio to normal operation.
5.10.8 Verifying Transmitter Performance (Analog
Operation)
When and where to use:
To verify the base radio transmitter meets the ASTRO
®
25 system standards, the base radio must be forced to
transmit a V.52 standard test pattern.
Procedure Steps
6871022P86-A - November 2012
5-43
Summary of Contents for GTR 8000
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