Piper ARCHER III Pilot Operating Handbook page 274

SECTION 9
SUPPLEMENT 13
SECTION 7 - DESCRIPTION AND OPERATION
The GTX 327 transponder is powered on by pressing the STBY, ALT or ON
keys, or by a remote avionics master switch (if applicable). After power on, a
start-up page will be displayed while the unit performs a self test.
Mode Selection Keys
OFF - Powers off the GTX 327.
STBY - Powers on the transponder in standby mode.
At power on the last active identification code will be
selected. When in standby mode, the transponder will
not reply to any interrogations.
ON - Powers on the transponder in Mode A. At power on the last active
identification code will be selected. In this mode, the transponder replies
to interrogations, as indicated by the Reply Symbol
include altitude information.
ALT -Powers on the transponder in Mode A and Mode C. At power on
the last active identification code will be selected. In ALT mode, the
transponder replies to identification and altitude interrogations, as
indicated by the Reply Symbol
include the standard pressure altitude received from an external altitude
source, which is not adjusted for barometric pressure. The ALT mode
may be used in aircraft not equipped with the optional altitude encoder;
however, the reply signal will not include altitude information.
GTX 327 Configuration Mode
The GTX 327's configuration, which is normally done at time of installation,
influences many of the unit's functions described in this manual. If you wish to
view or change any of the GTX 327 configuration parameters, you may access
the GTX 327 Configuration Mode. Use caution when changing configuration.
When in doubt, contact your authorized GARMIN Aviation Service Center.
The Configuration Mode should not be used while the aircraft is airborne.
REPORT: VB-1611
9-74, 4 of 10
PA-28-181, ARCHER III
. Replies to altitude interrogations
ISSUED: JULY 12, 1995
REVISED: JANUARY 2, 2001
. Replies do not