Cub Crafters CC18-180 Pilot Operating Handbook page 277

CUB CRAFTERS SECTION 9.7
CC18-180 SUPPLEMENTS-GMA 340
Marker Beacon Receiver
The GMA 340's marker beacon receiver controls are
located on the left side of the front panel (1-4). The SENS
button selects either high or low sensitivity as indicated
by the HI or LO LED being lit. Low sensitivity is used on
ILS approaches while high sensitivity allows operation
over airway markers or to get an earlier indication that the
aircraft is nearing the outer marker during an approach.
The marker audio is initially selected by pressing the
MKR/Mute button (2). If no beacon signal is received,
then pressing the button a second time will de-select the
marker audio. This operation is similar to the selection of
any other audio source on the GMA 340. However, if the
button is pressed for the second time while a marker
beacon signal is being received, then the marker audio is
muted but not de-selected. The button's LED will remain
lit to indicate that the source is still selected. When the
current marker signal is no longer being received, the
muting of the audio will be cancelled. While in the muted
state, pressing the MKR/Mute button de-selects the
marker audio. The button's LED will extinguish to indicate
that the marker audio is no longer selected.
REPORT TC10000AFM
Issued: 5/31/05
Date of revision: 12/06/05 Page number 9-7-9