Garmin GTX 345 Series Pilot's Manual - Page 14
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◦
The ON key selects the on mode.
ON
◦
The transponder replies to interrogations.Replies do not include pressure
altitude.
◦
The Reply (
responding.
◦
The ALT key selects the alt mode.
ALT
◦
Always use Alt mode while in the air and on the ground, unless
otherwise requested by ATC.
◦
All aircraft air/ground state transmissions are handled via the GTX 3X5
transponder and require no pilot action.
◦
The transponder replies to identification and altitude interrogations.
◦
The Reply (
◦
The GTX 3X5 transmissions include pressure altitude.
◦
The VFR key sets the transponder code to the preprogrammed VFR
VFR
code.This is factory set to 1200, but.may be changed during installation
configuration.
◦
To restore the previous identification code, press the VFR key a second time.
◦
To toggle between these two codes, continue to press the VFR key.
◦
The IDENT key activates the IDENT function for 18 seconds. This sets the
IDENT
transponder apart from others on the air traffic controller's screen.
◦
During this time the word "IDENT" will appear in the upper left corner of
the display.
◦
The SBY key selects the standby mode.
SBY
◦
The transponder will not reply to any interrogations or transmit ADS-B Out.
◦
If BT functions are enabled, BT functionality remains operational.
◦
The GTX 345 will continue to receive ADS-B In information, but will not be a
TIS-B participant.
2-2
Table 2-1 Mode Section Key Functions
) symbol on the display indicates the transponder is
) symbol indicates the transponder is responding.
GTX 335/345 Pilot's Guide
190-01499-00 Rev. C