Dynon Avionics SV-INTERCOM-2S - Manual (Page 11)

Installation
SV-INTERCOM-2S Installation and User Guide - Revision A 2-3
Electrical Installation
* == While the audio grounds labeled with a * ultimately come back to the main ground on pin
1, they should NOT be wired directly from the source audio device to any ground (pin 1 or
otherwise) directly. Instead, to minimize noise and interference, their ground lines should be
routed with their audio signal inside the required shielded cable as far as possible and
connected to ground as close to the intercom as possible. Connecting these grounds to the
shield (which is also grounded at pin 1) at the intercom end of the harness is a suitable way to
accomplish this goal.