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LMM for the Kodiak 100
Page 4-51
190-02102-00 Rev.4
3. A window showing the SIDETONE setting is displayed (see
).
4. Check the sidetone setting and adjust as necessary. The range is -100 to +100.
Figure 4-6. COM Setup Page Sidetone Adjustment
5. If the problem continues; switch GIA1 and GIA2, and reconfigure both GIAs at
their new locations, to verify if the unit or the aircraft wiring is the problem.
6. If the problem follows the unit, replace the GIA.
7. If the problem continues, replace the GMA.
4.7.3.6 COM Squelch Threshold Adjustment
The COM squelch threshold adjustment is not a required procedure and is not generally
performed during installation or maintenance. It can be used to adjust COM receiver 25.0
kHz / 8.33 kHz squelch settings if needed.
If the COM squelch opens after performing the procedure, the aircraft electrical system
might be noisy causing it to open. Find the source of electrical system noise and correct
it. Electrical motors are a common source of interference). Desensitizing the COM
squelch to prevent it from opening due to electrical system noise might reduce the
receiving range of the COM.
To set the COM Squelch threshold:
1. Connect a ground power unit to the aircraft.
2. Disconnect the GIA COM antenna connector at the back of the GIA rack and
connect an RF generator.
a) For 25.0 kHz frequency spacing, set the RF generator to 5.0µV hard,
modulated 30% at 1000 Hz.
b) For 8.33 kHz frequency spacing, set the RF generator to 3.0µV hard,
modulated 30% at 1000 Hz.
3. Turn on the system and allow it to initialize in normal mode.
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Summary of Contents for Cessna Caravan G1000
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