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190-01553-01 Rev. C
Garmin GTR 200 Pilot’s Guide
2
GTR 200
CONTROLS
Control Description
Menu
Button
Press to view Menu options on the right side of the screen. (ICS VOL,
ICS SQ, ♫ VOL, SETUP, USER FREQ, and ABOUT).
Power/
Volume/
Squelch
Knob
The Power/Volume/Squelch knob located in the bottom left corner
of the bezel controls audio volume for the COM radio. Rotating the
knob clockwise past the detent turns power on and counter-clockwise
turns power off. When the COM radio is active, press the Power/
Volume/Squelch knob to toggle automatic squelch control On/Off for
the COM radio.
The GTR 200 radio receiver features an automatic squelch that rejects many
localized noise sources. You may override the squelch function by pressing
the
Power/Volume/Squelch
knob. This facilitates listening to a distant
station or setting the desired volume level.
To override the radio receiver automatic squelch, press the
Power/
Volume/Squelch
knob momentarily. Press the
Power/Volume/Squelch
knob again to return to automatic squelch operation. A “SQ” indication
appears to the left of the active COM frequency window in the upper
left corner of the display when automatic squelch is overridden.
Softkeys
User-defined Softkeys, defined in configuration mode. Softkeys are also
used for menu navigation.
MicroSD
™
Card Slot
Used for updating unit software.
Frequency
Transfer Key
Press and release the Frequency Transfer Key to switch between
the active (left-most) and standby (right-most) frequency. Switching
between COM frequencies is disabled while transmitting. Press and
hold the Frequency Transfer Key for approximately three seconds
to tune the emergency frequency (121.500 MHz).
Monitor
Standby
Frequency
Key
The MON (Monitor) key will engage the monitor function where the
Standby frequency may be monitored while still listening to the Active
frequency.