Garmin GMA 340 Pilot's Guide - Page 7

•PILOT modeisolates the pilot from everyone else and dedicates the aircraft radios to the pilot exclusively. The copilot and passengers share communication between themselves but cannot communicate with the pilot or hear the aircraft radios. •CREW modeplaces the pilot and copilot on a common ICS communication channel. The passengers are on their own intercom channel and can communicate with each other, but cannot communicate with the crew or hear the aircraft radios. •ALL modeallows full intercom communication between everyone plugged in to the GMA 340. Aircraft radios are heard by all. •MUSIC 1 and MUSIC 2 stereo entertainment inputs are affected by the intercom mode selected. The following table summarizes the ICS operation for the different modes supported by the GMA 340: MODE PILOT HEARS PILOT (LED LIT) CREW (LED LIT) ALL LED's OFF) Selected Radios. Pilot. Selected Radios. Pilot. Copilot. MUSIC 1. Selected Radios. Pilot. Copilot. Passengers. MUSIC 1. COPILOT HEARS Copilot. Passengers. MUSIC 1. Selected Radios. Copilot. Pilot. MUSIC 1. Selected Radios. Pilot. Copilot. Passengers. MUSIC 1. PASSENGER HEARS Passengers. Copilot. MUSIC 1. Passengers. MUSIC 2. (MUSIC 1 in Dual ADF) Selected Radios. Pilot. Copilot. Passengers. MUSIC 1. MUSIC 1 MUTING TRIGGERED BY Copilot or passenger ICS activity. Aircraft radio activity. MKR activity. Pilot or Copilot ICS activity. Aircraft radio activity. MKR activity. ICS activity. MUSIC 1 is normally muted during ICS activity. However an installation option is available to disable ICS MUTE. Then muting of MUSIC 1 will not occur due to ICS activity. A panel mounted switch may be installed for this function. The MUSIC 1 mute trip level is adjustable by the installing agency. Mono/Stereo Headset .The use of stereo headsets is highly recommended. If monaural headsets are plugged into stereo jacks that do not have a switch installed, the unit will not be damaged. . If the pilot uses a monaural headset in a stereo jack, no audio will be heard during failsafe operation. When using a monaural headset the pilot's jack must be equipped with a stereo/mono switch and it must be set to the 'mono' position for proper failsafe operation. A person listening on a monaural headset will hear only the left channel from the GMA 340 in both ears. If a monaural headset is used at one of the passenger positions, any other passenger listening on a stereo headset will hear audio in their left ear only, unless their headset has a stereo/mono switch and it is set for mono. 7