Dynon Avionics SV-INTERCOM-2S - Manual (Page 21)

Using the SV-INTERCOM-2S
SV-INTERCOM-2S Installation and User Guide - Revision A 3-3
Muting Inputs
Whenever a radio or other non-muting input has audio activity, music and muting input volume
is immediately decreased to near fully-muted so that you may hear important radio
transmissions or audio alerts. When audio from radios/non-muting inputs ceases for a moment
(.5 second), volume levels are automatically restored gradually over the next second.
Selectable Auto Mute (music only)
Press the squelch knob to toggle whether or not music is muted by intercom conversation as
well as by non-muting input and radio activity. This allows you to set the music and aux muting
input to not mute as you sing along or occasionally chat over the intercom:

When Auto Mute is DISABLED: Only audio activity from radios and non-muting inputs
will mute music.

When Auto Mute is ENABLED: Audio from radios, non-muting inputs, AND intercom
conversation will mute music.
Fail-safe Operation
When power is lost or the SV-INTERCOM-2S is powered off, the primary radio is connected
directly to the pilot’s headset. If the pilot headset is a stereo headset, you will only hear radio
audio in one ear. Intercom conversation and audio from other radios and inputs (including
music) will not be heard when in this unpowered fail-safe mode.
Radio Push-to-Talk (PTT) Behavior and Priority
When the pilot or co-pilot presses their PTT switch, only the person pressing their PTT is heard
over the radio.
If the pilot and co-pilot PTT buttons are both depressed, the pilot PTT takes priority. Only the
pilot’s voice is transmitted over the radio. Additionally, the pilot PTT will take priority from the
co-pilot even if the co-pilot PTT is already depressed.
Dual Radio Operation
If you have two COM radios, you will have installed an external switch that chooses which radio
transmits when you press the PTT switch.
Use your radio volume control to control which radio(s) you wish to hear at any given moment.