Garmin APOLLO GX SERIES, Service Manual

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Garmin AT Rev --
7-18 GX Service Manual © 2004 Garmin AT
Test Configuration
The TST-10 test station is used to interface the power and audio I/O between the Comm radio and
the other bench test equipment. Test configuration for the Comm radio test setup is described for
each model in the TST-10 User’s Manual, 560-0399-00.
Transmit Presets for HP8920
1. Press
PRESET
on the HP8920:
2. Press the
TX
function key from the SCREEN CONTROL.
3. Using the CURSOR CONTROL knob and the DATA keypad set:
TX TEST screen
Tune Mode AUTO MANUAL
Tune Freq 127.5 MHz
TX Pwr Zero Zero
Input Port RF IN/ANT
IF Filter 15 kHz
Ext TX Key On/off
AF Anl In AM Demod
Filter1 50 Hz HPF
Filter2 15 kHz LPF
De-EMPHASIS Off
Detector Pk ± 2
AF GEN1 Freq 1 kHz
AF GEN LVL 100 mV
TX Freq Error PPM
4. When conducting the transmitter performance test, do not use local frequencies such as tower,
ground ATIS and
do not use the emergency frequency - 121.5 MHz.