Garmin GTN 750 Pilot's Guide - Page 72

Foreword Getting Started Audio & Xpdr Ctrl Com/Nav FPL 6. Touch the Enter key to accept the displayed name and frequency. The new User Frequency will be added to the list. User Frequency Name User Frequency Value Touch to Add Another User Frequency Touch to Edit/Remove the User Frequency Direct-To Figure 3-18 Completed New User Frequency Proc 3.3.3 Emergency Frequency Charts The GTN 750's emergency frequency select provides a quick method Wpt Info of selecting 121.50 MHz as the active frequency in the event of an in-flight emergency. The emergency frequency select is available whenever the unit is on, Map regardless of GPS or cursor status, or loss of the display. To quickly tune and activate 121.50, press and hold volume Traffic knob or the remote Com flip-flop key for approximately two seconds. If the external remote key is used, further Terrain changes in Com frequency will not be possible until the external remote switch is pressed again for two Weather seconds. Nearest NOTE: Under some circumstances if the Com system loses communication with the main system, the radio will automatically tune to 121.50 MHz for Music transmit and receive regardless of the displayed frequency. Utilities 3.3.4 Stuck Microphone Whenever the GTN 750 is transmitting, a "TX" indication appears in the Com System window. If the push-to-talk key on the microphone is stuck or accidentally left Messages in the keyed position, or continues to transmit after the key is released, the Com transmitter automatically times out (or ceases to transmit) after 30 seconds of Symbols continuous broadcasting. You will also receive a "Com push-to-talk key stuck" message as long as the stuck condition exists. Appendix Index 3-12 Garmin GTN 725/750 Pilot's Guide 190-01007-03 Rev. B