Motorola DIMETRA MTS 2, Installation, Configuration And Basic Service Manual

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Recommended Test Equipment Chapter 13: MTS Troubleshooting
Recommended Test Equipment
Table 13-8 lists the recommended test equipment to perform the Base Radio trou-
bleshooting/station operation procedures.
Table 13-8 Recommended Test Equipment
Test Equipment Model Number Use
TETRA Signal Generator Rhode & Schwarz:
S SMX-K8 Used for checking receive and transmit
operation.
TETRA Analyzer Agilent E4443A
Dummy Load (50 Ω , 250 W) Weinschel 453033 Used to terminate output
Service Terminal VT100 or compatible Local service terminal
Power Meter HP 437B
Used to measure re
fl
ected and forward power
RF Attenuator, 250 W, 40 dB Weinschel 404043 Protection for HP89441A
RF Attenuator, 10 dB minimum 100 W Protection for HP89441A
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
fi
eld 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.
Figure 13-3
shows the Procedure 1 Troubleshooting Flowchart.
13-40
6802800U74-N September 2009