Garmin 240 Pilot's Manual page 5

190-00917-00 Rev. A
COM receiver keys. Pressing a COM receiver key selects the receiver,
which is heard in addition to the selected transceiver. Pressing again
deselects the receiver.
Transceiver selection keys. Pressing a COM transceiver key selects the
COM transmitter and associated receiver. One of the transceivers is
always selected as active.
Monitor Mute key. Mutes all other monitored receivers when the active
transceiver receives audio.
Telephone key. Pressing the TEL Key selects the Telephone interface.
Pressing again deselects the telephone.
NAV receiver and AUX keys. Pressing a key selects the Nav receiver or
AUX audio input. Pressing again deselects the audio.
Master Music key. Pressing the MUSIC Key allows the selected music
input to be heard. Pressing again deselects music.
Music Source 1 or 2 selection key and Music Source Annunciators.
Selects Music input 1 or 2. LED 1 or 2 iluminates to indicate which input
is selected.
Music 1/TEL jack. External music device or telephone input.
ICS Key. When selected, music is muted during Intercom operation.
RADIO Key. When selected, music is muted during reception of selected
aircraft radios.
Garmin GMA 240 Pilot's Guide
GMA 240 Audio Panel
5