Installation Instructions

GTN 6XX/7XX AML STC Installation Manual 190-01007-A3
Page 5-62 Rev. 4
Audio Processor generates COM3 internal side tone
Selecting True causes the audio panel to provide COM3 side tone. Selecting False allows the COM3
radio to generate its own side tone. False is the default selection.
COM 1 is connected as COM 2
Select True if COM 1 is connected as COM 2, select false if COM 1 is connected as COM 1. False is the
default selection. This setting allows the GTN 7XX to be connected to the COM 2 port, but appear to the
pilot as COM 1. Refer to Section 2.4.14 for more information and wiring instructions for this setting.
Ambient Noise Mic On
This setting enables or disables the ambient noise sensor that is built in to the GMA 35. The ambient
noise sensor allows the GMA 35 to adjust the volume of the speaker based upon the ambient noise
environment. The ambient noise sensor is mounted internal to the GMA 35, with no external wiring.
Select either True or False. False is the default selection.
5.5.4.8.2.2 Volume Configuration Settings
Use the following procedure when adjusting volumes in the GMA 35 to provide the best audio results.
This procedure allows the signal levels in the audio wires to be large so that they are more resistant to
noise interference. When audio levels can be controlled at the audio source and the GMA 35 has an input
gain control for the audio source, perform the following procedure:
1. Adjust the source audio level to the minimum and the audio panel input gain control to the
minimum.
2. Adjust the volume settings on the audio panel for normal operation.
3. Increase the audio source level until the desired audio level is reached or the audio source is close
to the maximum specified input level for the audio panel input.
4. If the audio from the audio source is not loud enough, increase the audio panel input gain until the
desired audio level is reached. Repeat this setup for each audio source and audio panel input with
adjustable gains.
5. If the audio source does not have adjustable gain then adjust the gain for the audio panel input
until the desired audio level is reached. For volume adjustments on the GMA 35, increasing the
gain to +96 will increase the volume, and decreasing the gain to -96 will decrease the volume.
6. If the audio panel input does not have adjustable gain then adjust the audio source gain until the
desired audio level is reached. Refer to the audio source manufacture’s installation documentation
for volume adjustment instructions.
NOTE
For the volume settings described below, higher gain values increase volume, and lower
gain values decrease volume.