GENERAL OPERATION
MC524B MICROPHONE/CONTROLLER
FUNCTION KEYS
There are several keys beneath the microphone controller’s
display that have dual functions. Their primary functions are
printed in black and their secondary functions are printed
in red.
To access the primary (black) functions
Press the key with the required function labelled in black.
e.g. To control the Squelch, briefly press the
SQL
ALPHA
key.
To access the secondary (red) functions
Press the Function key
MENU
F
followed immediately by the
key with the required function labelled in red.
NOTE:
If the secondary key is not pressed within 10
seconds the
MENU
F
key selection will time-out
.
VOLUME KEY
+
–
+
–
Press the
+
–
key to increase the volume and the
+
–
key to decrease the volume.
NOTE:
At minimum volume setting there is still sufficient
volume to be heard in a quiet cabin environment.
Channel Up
Push-To-Talk (PTT)
Skip/Call
Channel Down
Menu/
F Key
Power Key/
Monitor
Quiet/
Duplex
Squelch/
ALPHA
SCAN/
OS/GS
Squelch level/
Priority channel
Microphone
Volume Up
Volume Down
LCD Display
Quiet Tag
Channel Display
Transmit
Busy
SelCall RX
Scan
SelCall/Alpha Display/Signal Meter/Battery
Quiet
CTCSS/DCS
SelCall TX
Repeater (Duplex)
DISPLAY
T X 3 3 4 5
I N S T R U C T I O N M A N UA L
PA G E 5
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