3-7190-01182-00 Rev. B Garmin GTR 225/225A/225B Pilot’s Guide3.3 ICS ConfigurationICS Configuration adjusts the intercom, sets the AUX audio, and turns theintercom and speaker on or off.3.3.1 Adjust IntercomThe Adjust Intercom function sets the values for the intercom squelch, intercomvolume, and sets the intercom audio to mute when COM transmissions arereceived. The Intercom On/Off function must be set to ON to make the AdjustIntercom function available.NOTE: To enable ICS auto squelch, turn the knob one click counterclockwise past 0. Whensquelch is set to auto, the squelch sensitivity adjusts automatically. When squelch isset to 0, squelch is usually open. When squelch is set to 100, squelch is usually closed.ICS auto squelch is available with software v2.10 or later.Intercom SquelchIntercom VolumeMute On RXAdjust Intercom Settings1. Press ICS.2. Turn the inner knob to set the ICS squelch (SQ) value.3. Turn the outer knob to move to ICS volume (VOL) field.4. Turn the inner knob to set the ICS volume level.5. Turn outer knob to MUTE ON RX (software v2.10 or later).6. Turn inner knob to ON or OFF. To mute when a radio transmission isreceived, select ON.7. Press ENT to save changes.Press CLR to cancel the changes.