Garmin GTR 200 사용자 설명서

190-01553-01  Rev. C

2

Press to view Menu options on the right side of the screen.  (ICS VOL, 
ICS SQ, 

♫ VOL, SETUP, USER FREQ, and ABOUT).

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. 

User-defined Softkeys, defined in configuration mode.  Softkeys are also 
used for menu navigation.

Used for updating unit software. 

Press and release the 

 to switch between 

the active (left-most) and standby (right-most) frequency. Switching 
between COM frequencies is disabled while transmitting.  Press and 
hold the 

 for approximately three seconds 

to tune the emergency frequency (121.500 MHz).

The MON (Monitor) key will engage the monitor function where the 
Standby frequency may be monitored while still listening to the Active 
frequency.