6-95
SECTION 6
OPTIONS
6-14-11 EDACS TRUNKING OPERATIONAL NOTES
This section provides some notes and hints on operating the EDACS Trunking Option of
the COM-120C.
Squelch Setting
The squelch knob setting on the COM-120C unit is very important for all testing.
While in the EDACS Trunking Main Screen with no RF being transmitted into the
COM-120C unit, turn the squelch knob full counterclockwise. The green squelch light is
ON. Slowly turn the knob clockwise until the green light just goes off (make sure there
is no flickering). This setting is valid for all EDACS testing.
Control/Working Channels
If a radio is having trouble locking onto the Repeater Simulator, completing calls or the
Radio Simulator is showing NC, check the programming of the Control and/or Working
Channels in the Setup menu. These channels must be valid for the particular system
under test.
If the radio is having trouble locking onto the Repeater simulator, check the CH #: field.
This must be set to a valid working channel number, it is NOT the Control Channel
number.
Data Generation
If the radio won’t lock onto the Repeater Simulator, won’t stay up when being called or
the Radio Simulator is having trouble completing calls, check the DATA Mod Source.
The DATA Mod Source must be set for FM Modulation. The recommended deviation is
3.2 kHz (1.5 kHz for narrow band) with a sub-audible deviation of
0.70 kHz (0.35 kHz for narrow band).
Logical/Group ID
If a radio can not be called in the Repeater Simulator or can not make a call in the
Radio Simulator, check the Group/Logical ID. The Group ID must valid for the system
under test.
FM-Zero
If a radio is having trouble completing a Group Call (maybe works 50% of the time), an
FM-Zero (FMZ) operation may be necessary. Do this in the Automatic Test using F4
FMZ while in the idle state, or FMZ in any manual mode simulator by cursoring to the
Deviation field in the left column and pressing F3 FMZ.
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General