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5.10.5.8
Checking UHF Duplexer After Tuning
Procedure:
1
Ensure all notch adjustment lock nuts (6) are tight.
2
Ensure all pass adjustment lock nuts (6) are tight.
5.11
Testing the GTR 8000 Base Radio Performance with a Service
Monitor for Integrated Voice and Data
The service monitor is used to test and measure the transmitter and receiver characteristics of the
base radio. The Service Monitor may be connected to a base radio to perform tests and measurements
designed to determine whether the equipment is operating within specifications.
The sections that follow contain procedures performed when you first set up your system, and can be
scheduled on a regular basis as part of the maintenance policies of your organization. Topics covered
include:
•
Deviation Standards (Digital Operation) on page 184
•
Monitoring the Power Supply Module on page 185
•
Verifying Receiver Performance for FDMA Operation on page 185
•
Verifying Receiver Performance (Analog Operation) on page 190
•
Checking Receiver Sensitivity (Self-Test Method) (IV and D) on page 192
•
Monitoring the Transmitter Metering Points on page 193
•
Verifying Transmitter Performance (Digital Operation) on page 193
•
Verifying Transmitter Performance (Analog Operation) on page 195
5.11.1
Deviation Standards (Digital Operation)
NOTICE:
These specifications allow a tolerance of ±10%. However, because the accuracy of
the service monitor is only ±5%, the allowable tolerance in the measured deviation is ±5% and
not ±10%.
Table 47: Deviation Standards for ASTRO 25 System Test Patterns
Signal
Minimum Devia-
tion
Nominal Devia-
tion
Maximum Devia-
tion
low signal deviation
0.84 kHz
0.93 kHz
1.02 kHz
sow signal wide pulse deviation
undetermined
1.00 kHz
undetermined
standard deviation
2.55 kHz
2.83 kHz
3.11 kHz
standard wide pulse deviation
undetermined
3.00 kHz
undetermined
V.52 deviation
2.91 kHz
3.23 kHz
3.55 kHz
V.52 wide pulse deviation
undetermined
3.00 kHz
undetermined
C4FM deviation
2.91 kHz
3.23 kHz
3.55 kHz
C4FM wide pulse deviation
undetermined
3.00 kHz
undetermined
MN003286A01-E
Chapter 5: GTR 8000 Base Radio Optimization
184