4.2C GTX 327 TRAN SPONDER OP ER ATING IN STRUC TIONS
De tailed op er at ing in struc tions can be found in the (GARMIN P/N
190-00187-00) GTX 327 Pi lot’s Guide
. Some high lights of that
Pi lot’s Guide (and the In stal la tion Man ual) are printed here.
Many pi lots will only need to know that the (Model A) re ply code
is usu ally dis played, and that press ing a num ber but ton starts over
writ ing in a new re ply code (left to right). Dur ing new code en try,
the CLR but ton works as a back space, and the CRSR but ton can -
cels a par tial (less than four num ber but ton presses) en try. As ex -
pected, SBY switches the ra dio ON but al lows no re plies, ON
starts only Mode A re plies, ALT starts both Mode A and C re plies,
and OFF switches the tran sponder OFF (if held in for at least two
sec onds). If the he li cop ter has an op tional Avi on ics Mas ter
Switch, the GTX 327 will re mem ber which mode was se lected be -
fore the Avi on ics Mas ter was switched OFF. There is no TEST
mode to test the re ply light be cause there is no sep a rate re ply light;
there is, in stead, a cir cled “R” that shows up on the lower left cor -
ner of the dis play, for a re ply in di ca tor. The IDENT but ton ac ti -
vates 18 sec onds of IDENT and adds the word “IDENT” to the
up per left cor ner of the dis play. The VFR but ton tog gles to and
from a VFR code (usu ally 1200) from the en tered Mode A re ply
code that is re mem bered (even dur ing shut down) un til a new code
is four but ton en tered. (The VFR code may be pi lot se lected, in
the Con fig u ra tion mode.)
Pressing the FUNC but ton ad vances the PRES SURE ALT part of
the dis play through three dif fer ent six digit stop watch type tim ers:
a FLIGHT TIME du ra tion timer, a sim i lar COUNT UP timer, and a
re verse op er at ing COUNT DOWN timer (that may all be op er ated
si mul ta neously), and then back to (en coder) al ti tude. Use the
CRSR but ton and six presses of the ten num ber but tons, to se lect
the start ing time for the count down timer. The START/STOP
but ton starts or stops (and the CLR but ton re sets) which ever timer
is pres ently in view. When the COUNT DOWN timer passes zero,
it flashes and con tin ues as a count up timer, and “COUNT
SCHWEIZER MODEL 269C-1 HELICOPTER
CSP-C1-1A
10.2 FAA Approved: 03 Oct 1995
Revised: 29 Mar 2001
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