Installation Instructions

190-01007-A3 GTN 6XX/7XX AML STC Installation Manual
Rev. 4 Page 5-29
5.5.1.10 COM Configuration Page (GTN 635/650/750 Only)
Select the COM Configuration page, shown in Figure 5-16,
from the main GTN Setup page, shown in Figure 5-4 above.
These values are set at the factory and rarely require
calibration.
To enable or disable the COM radio, touch the key to toggle
between Enabled and Disabled. The COM radio defaults to
the enabled state.
COM RF Squelch
This setting configures the RF squelch threshold for the COM
radio. This field may be set to any value between 0% and
100%. The default is 0%. 0% is the most sensitive (i.e. the
weakest signal level necessary to break squelch). Increasing
the value will require a stronger signal to break squelch.
Mic 1 Gain
The MIC 1 Gain can be adjusted from -12 dB to +30 dB in 6
dB increments. The default is +12 dB. For mics with low
signal levels, this can be adjusted up to increase the signal
strength. For mics with high signal levels, this can be adjusted
down to decrease the signal strength.
Sidetone Volume
This parameter sets the audio side tone output level. Side tone refers to the audio spoken into the COM
microphone. This setting only affects the volume of the side tone for the GTN COM during PTT. This
value may be set to values between 0.0 dB and 63.0 dB in 0.5 dB increments. The default is 17.5 dB. The
higher the setting, the louder the side tone will be. The side tone is only generated in the COM headset
(low level) audio output.
Figure 5-16. COM
Configuration Page