Garmin GTR 200 GTR 200 Pilot's Guide - Page 12
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GTR 200 CONTROLS Control Menu Button Power/ Volume/ Squelch Knob Description 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. Softkeys MicroSD™ Card Slot Frequency Transfer Key Monitor Standby Frequency Key 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 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). The MON (Monitor) key will engage the monitor function where the Standby frequency may be monitored while still listening to the Active frequency. 2 Garmin GTR 200 Pilot's Guide 190-01553-01 Rev. A