Dynon Avionics SkyView Classic - Page 400

SV-COM-C25 Installation and Configuration
16-18 SkyView System Installation Guide - Revision AA
> MIC GAIN – The default setting
of 50 should work for most
installations.
To assist in setting SV-COM-425’s
microphone gain, the COM RADIO
SETUP > MIC GAIN (SV-COM-425
ONLY) menu includes a diagnostic
feature (MIC LEVEL: LOW / GOOD /
HIGH), as shown on screen:
To adjust, speak “test”
continuously into the microphone
while in the cockpit with the
engine running. While speaking, find the lowest setting that results in MIC LEVEL continuously
indicating GOOD. Stop speaking and if necessary lower the setting until MIC LEVEL indicates
LOW when you are not speaking.
In practice, a more reliable method to determine the correct setting of MIC GAIN is to ask a
helper to listen on another radio while you talk in brief intervals, allowing for other
transmissions to be heard by the helper. For such a test to be valid, depending on the particular
radio, aircraft, antennas, and terrain (buildings), it may be necessary to have some distance
between you and the helper (being right next to each other will not be a valid test). With the
helper listening on your (not heavily in use) test frequency, adjust MIC GAIN slowly up or down,
pausing between transmissions.
For example, set MIC GAIN to 55, speak “Test1, Test2, Test3, Test4, Test5”, then pause a minute
or so for other transmissions to be heard. The helper should reply whether your transmission
was weaker, or stronger than the other transmissions. If the helper indicated your transmission
was stronger than the other transmissions, adjust MIC GAIN lower, and do another set of
transmissions. When the helper hears your audio to be about the same volume as the other
transmissions, MIC GAIN is set correctly.
If other people report that your transmissions fade off at the end or can't be heard at all, you
may need increase MIC GAIN. If your transmissions are reported to sound "hollow", "robotic" or
if they have a lot of background noise, you may need to decrease MIC GAIN. Also note these
issues can only be heard on real transmissions by third parties.
The audio you hear in your headset (Sidetone) when you transmit is unaffected by
the MIC GAIN setting. As explained above, the best method to set MIC GAIN
correctly is to work with a helper who is listening to your transmissions on a
different radio.