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Recommended Test Equipment
Recommended Test Equipment
Table 13-8
bleshooting/station operation procedures.
Table 13-8
Test Equipment
TETRA Signal Generator
TETRA Analyzer
Dummy Load (50 Ω, 250 W)
Service Terminal
Power Meter
RF Attenuator, 250 W, 40 dB
RF Attenuator, 10 dB
Troubleshooting Procedures
The Base Radio is computer-controlled and employs digital signal processing techniques. Many
of the troubleshooting and station operation procedures require Man-Machine Interface (MMI)
commands. These commands are used to communicate station level commands to the Base Radio
through the RS-232 communications port located on the front of the BRC.
The field maintenance philosophy for the Base Radio is to repair by replacement. The station
is comprised of self-contained Field Replaceable Units (FRU).
A defective FRU is replaced with a non-defective module. This method of troubleshooting limits
down-time and quickly restores the Base Radio back to normal operation.
Ship defective modules to a Motorola repair depot for repair.
This manual provides two troubleshooting procedures for the Base Radio. Each procedure
is designed to quickly identify faulty modules.
Routine Checkout
Procedure 1 is a quick, non-intrusive test performed during a routine site visit. Use this
procedure to verify proper station operation without taking the station out of service.
shows the Procedure 1 Troubleshooting Flowchart.
13-40
lists the recommended test equipment to perform the Base Radio trou-
Recommended Test Equipment
Model Number
Rhode & Schwarz:
SMU200A + SMX-K8
Agilent E4443A
Weinschel 453033
VT100 or compatible
HP 437B
Weinschel 404043
minimum 100 W
Chapter 13: MTS Troubleshooting
Use
Used for checking receive and transmit
operation.
Used to terminate output
Local service terminal
Used to measure reflected and forward power
Protection for HP89441A
Protection for HP89441A
Figure 13-3
6802800U74-N September 2009
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Troubleshooting
