SL40 COM programming settings. These are the values that are changed from Garmin's defaults to help make the SL40 work better in the Cub noise environment. If the value is not listed below just leave it at the default setting. There are two menus, some of these are on each. The SL40 user guide will tell you how to access and change these values.

HDPHON LvL: 000
MIC 1 SQLCH: 28
MIC 2 SQLCH: 28
Transmit Mic: MIC 1 & 2
Intercom LvL: 000
Sidetone LvL: 45 (CC Factory sets to 45, if you set to 000 it will track the volume knob and may work better)
Lo Disp LvL: 25
Hi Disp LvL: 50

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RCVR Sqelch: 064
Mic 1 Level: 128
Mic 1 Level: 128