GNC 400 COMM TRANSCEIVER ALIGNMENT PROCEDURE
P/N 005-00051-55 REV. T
Page 5
Figure 1
3. COMM TRANSCEIVER ASSEMBLY ALIGNMENT
This section describes the step-by-step procedure used to perform a GNC400 COMM transceiver
assembly alignment. Refer to the GNC 400 COMM XCVR MINIMUM PERFORMANCE
SPECIFICATION (MPS) Garmin P/N 004-00044-03 for specifications.
The unit should be connected as outlined in section 2.2
.
3.1 Initial Control Settings
3.1.1 Discrete Adjustment
L104
Pre-selector Pole 1 coil
Mid - range as Factory preset
L106
Pre-selector Pole 2 coil
Mid - range as Factory preset
L109
Pre-selector Pole 3 coil
Mid - range as Factory preset
L111
Pre-selector Pole 4 coil
Mid - range as Factory preset
L200
8.33 kHz Xtal filter Input
Mid - range as Factory preset
L201
25 kHz Xtal filter Input
Mid - range as Factory preset
L202
8.33 kHz Xtal filter Output
Mid - range as Factory preset
L203
25 kHz Xtal filter Output
Mid - range as Factory preset
T200
IF AMP Input Match
Mid - range as Factory preset
T201
IF AMP Output Match
Mid - range as Factory preset
C300
Synthesizer Ref. Osc.
Mid - range as Factory preset
