Garmin GTX 327 Pilot's Manual - Page 3

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Garmin GTX 327 Pilot's Manual
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i'rr piritt.itrr
['f.:
The
GTX327
trarsponder
is
poweredonby
pressíngthe
SÍBY,
ALT
or
ON
heys,
orby
a
remote
avionics
mlster
switch
(if
applicable).
AJter
power on
a
start-up
page
wíll
be
dîsplayed
whíle the
unit
p
er
J
orms
a
s
ef
test.
Mode Selection
Keys
OFF-
Powers
off the GTX 327.
STBY-
Powers
on
the
tmnsponder 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
rransponder
in
Mode
A.
At power on
the last active
identifica-
tion
code
will
be
selecred. In this mode,
the
transponder
replies
to intenogations,
as
indicated by
the Reply
Symbol
(E).
Replies
do not 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
ALI
mode,
the
transponder
replies
to
identification and altitude interrogations,
æ
indicated by
the Reply
Symbol
(Þ.
Replies to
altitude intenogations 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 o[ installation, influences
many of
the
unit's functions
described
in
this
manual. If
you wish to view or
change any
of
the
GTX327 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
Conþration
Mode should not
be used
while
the
aircraft is
airbome.
To
use
the
GT)/.327
Configuration
Mode:
2.
3.
4.
Press
and hold
the
FUNC
key
while
powering on
the unit
using
the
STBY,
0N,
or
AIT
key
(or using an avionics master switch).
Press
the
FUNC
key
to
sequence
through
the
configuration
pages.
Use
the
CRSR key
to highlight
selectable fields on each
page.
When
a
field
is
highlighted, enter numeric data using the
0
-
9 keyl
and select items
from
a list using the
8
or
9
keys.
Press
the
CRSR key
to
confirm list selections.
5.
Code
Selection
ooEoo
E@o
Code selection is done
with
eight
keys
(0
-
7) that provide 4,096
active
identification
codes.
Pushing one
of
these keys begins the code selection
sequence.
The
new
code
will
not
be
activated
until
the
fourth digit
is
entered.
Pressing the
CLR
key
will
move the
cursor back
to
the
previous
digit.
Præsing the
CLR
key
when
the
cursor
is
on the first
digit
of
the code,
or
pressing the CRSR
key
during
code
entry
will
remove the
cursor and
cancel
dau entry
restoring
the
previous
code.
The numbers
8 and 9
are
not
used
for
code
entry
only
for
entering
a
Count Down time,
and
in
the Configuration Mode.
lmportant
Codes:
l20G-The
VFR code
for
any
altitude
in
the US (Refer
to ICAO
standards elsewhere)
7000-
The VFR code
commonly
used
in
Europe
(Refer
to ICAO standards)
7500-
Hrjack
code
(Aircraft
is
subject
to
unlawful
interference)
7600-
Loss
of communications
7700-
Emerçncy
7777-Military
interceptor operations
(Never
squawk this
code)
0000-Military
use
(Not enterable)
Care
should
be
taken not to
select the code
7500 and all
codes
in
the7600-7777
range,
which
rrigger special
indicators in automated
facilities.
Only
the code
7500
will
be decoded
as
the
hijack code. An aircraftb transponder
code
(when
available) is
utilized to
enhance
the
tracking capabilities of
the ATC
facilit¡
therefore
care
should
be taken
when making
routine
code changes.
Kevs
for
Other
GTX
327
Functions
IDENT:-
Presing
the
IDENT
key activates the Special
Position
Identification
(SPI) Pulse
for
18 seconds,
identifying
your transponder
return
from
others
on the
air traffic controller's
screen. The
word'IDENT'will
appear
in
the
upper left
comer
of
the
display while
the
IDENT mode
is
active.
VFR-
Ses
the
transponder
code
to
the
pre-programmed
VFR code selected
in
Configuration Mode (this
is
set
to
1200 at
the
factory).
Pressing the
VFR key
again
will
restore the
previous
identification
code.
1.
,l
)