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GTN 625/635/650 Cockpit Reference Guide (CRG)
190-01004-04 Rev. C
Transponder
TRANSPONDER
Transponder Control
Squawk Code Field
Transponder
Mode
Active
Transponder
*
Transponder ID
Touch the Squawk Code Field to enter frequency for either Transponder 1
(XPDR1) or Transponder 2 (XPDR2).
IDENT
Touch
IDENT
to activate the transponder’s IDENT function. The key text
remains gray and will change to green when IDENT mode is active.
Current Mode of Transponder
Transponder Panel Page
Standby:
Touch to place transponder in Standby mode. It is still
powered, but will not transmit information. STBY displays in the
squawk code fi eld.
Ground:
Touch to place transponder in Ground mode. Mode S
interrogations will be allowed. GND displays in the squawk
code fi eld.
On:
Touch to turn transponder On for Mode A operation. Will
transmit the squawk code when interrogated. ON displays in
the squawk code fi eld.
Altitude
Reporting:
Touch for Mode C operation. The transponder will be on and
will transmit its squawk code and altitude when interrogated.
ALT displays in the squawk code fi eld.
VFR:
Touch to set the squawk code to 1200.
Summary of Contents for GTN 625
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