User manual GARMIN GMA 340

[. . . ] When this mode is active, COM 1 is dedicated solely to the pilot for MIC/audio while COM 2 is dedicated to the copilot for MIC/ audio. The pilot and copilot can simultaneously transmit in this mode over separate radios. Both pilots can still listen to COM 3, NAV 1, NAV 2, DME, ADF and MKR as selected. The Split COM mode is , cancelled by pressing the COM 1/2 button a second time. [. . . ] · LEFT LARGE KNOB -- Pilot ICS mic VOX squelch level. CW rotation increases the amount of mic audio (VOX level) required to break squelch. Full CCW is the "hot mic" position. · RIGHT SMALL KNOB -- IN position: Copilot ICS volume. OUT position: Passenger ICS volume. · RIGHT LARGE KNOB -- Copilot and passenger mic VOX squelch level. CW rotation increases the amount of mic audio (VOX level) required to break squelch. Fully CCW is the "HOT MIC" position. Each of the six microphone inputs have dedicated VOX circuits ensuring that only the active microphone(s) is/are heard when squelch is broken. This represents a vast improvement over the partyline systems and reduces the amount of background noise in the headphones during cockpit communications. After the operator has stopped talking, the intercom channel remains momentarily open to avoid closure between words or normal pauses. The GMA 340 provides three intercom modes: PILOT, CREW and ALL. The mode selection is accomplished using the PILOT and/or CREW buttons. Pressing a mode button activates the corresponding ICS mode. The operator can switch directly from PILOT to CREW or from CREW to PILOT by pressing the other mode button. The ALL mode is active when neither PILOT nor CREW LED are lit. To switch from PILOT to CREW mode, press the CREW button; from CREW to PILOT, press the PILOT button. An LED ON indicates the isolation mode is active. 6 · PILOT mode isolates 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 mode places 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 mode allows full intercom communication between everyone plugged in to the GMA 340. · 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 Selected Radios. MUSIC 1 MUTING TRIGGERED BY Copilot or passenger ICS activity. [. . . ] The GMA 340's function then monitors the marker signal and automatically unmutes the audio when the current marker signal is no longer being received. In all cases, the marker beacon lamps operate independently of any audio selection and cannot be turned off. The GMA 340 can drive external marker lamps if required. 8 Limited Warranty GARMIN Corporation warrants this product to be free from defects in materials and workmanship for one year from the date of purchase. GARMIN will, at its sole option, repair or replace any components which fail in normal use. [. . . ]