6-105
SECTION 6
OPTIONS
6-15-7 TESTING RADIO UNITS
When testing a Radio Unit, the most commonly used mode is the manual REPEATER
SIMULATOR. In this mode the COM-120C acts as a single channel MPT 1327 trunked
repeater using control/traffic reversion when calls are initiated. The COM-120C allows a
radio unit to be sent a GTC and switch into a call mode, making basic functionality and
parametric measurements possible.
The quickest route to checking a Radio Unit is to:
o Select the correct Network file from stored files or create a new one
o Enter Repeater Simulator mode
o Ensure correct Antenna connections are selected and RF levels are correct
o Wait until Radio Unit goes into service
o Initiate a Speech Call request from the Radio Unit
If the Radio Unit does not enter service, but appears to be attempting to register on the
COM-120C channel, check that the squelch is adjusted correctly and the baseband
metering is switched OFF.
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