Installation manual
0
D.
0
0
0
0
0
0
n
D
D
D
0
0
0
0
3.1
NORMAL
OPERATION
...........,..
Kl'tn~a
T RA -spo
DE
R
SECTION
Ill
OPERATION
The
tr
a
nsponder
is
tu
rned
on
by
rota
ti
ng
the fu
nc
ti
on
sel
e ct
or
f
rom
the
off
position
to
any
other
position.
-NOTE-
T
he
KT 76/ 78
sh
ould
be
tu
rne
d off
be
f
ore
st
ar
t
in
g
aircra
ft
enginc
(s
}.
After
being
turned
on
there
is a
30
second
d
elay
b
efore
t
he
uni
t b
eco
me
s fu
nctional.
This
is
to
permit
the
t
ransmitter
t
ube
to w
arm-up
and
stab
il
ize.
U
sually
th
e f
unction
switch
will
be
rotat
ed
to
the
" s t
andby
" pos
ition,
however,
an
y o
pe
rative
pos
i
tion
will
initiate
the
time
delay
turn
on.
An
y
ti
me
th
at
th
e f
unction
sw
it
ch
is in
the
"ON"
or
11
ALT"
position
the
t
ranspon
de
r
becomes
an
ac
ti
ve
pa
rt
of t he
be
acon
system.
rt
is
undesirable
from
a
sys
t
em
s
view
point
to
be
opera
t ing (
func
ti
on
selector
in
e i
th
er
of
these
positions)
while
on
the
g
round,
t
axiing,
o r r u
nning
up
at a t
ermina
l w
it
h a
co-
l
ocated
beacon
interroga
t
or.
Attenti
on
sho
ul
d
be
paid
to
the
code
sele
cte
d
on
the
contro
l
head.
The
selected
code
sh
oul
d b e
in
accor
d
ance
wi
th
ins
t
ruc
t
ions
f
or
IF R
f
li
ght
or
rul
es
applicab
l e to t
ran
s
pon
der ut
ili
z
at
ion f
or
V F R
flight
.
--NOTE-
N
ever
a
cti
va
te the t
ransponder
with
eithe
r
Co
de
0000,
7
700
or
7777
sel-
ecte
d
on
th
e
co
nt
rol
h
ea
d.
Code
7700
is
se
le
cted
f
or
emer
ge
ncies.
During
normal
transponder
operation,
a
fla
shing
l
amp
is
an
indication
of a t
ransmitted
reply.
An
in
t
errogation
will
no
rm
all
y be
at
10 -
15
seco
nd
s
int
ervals.
Lamp
flashes
within
this
interval
may
be
f
ro
m
noise,
a
second
or
t h
ird
in
t
erro
ga
t
or,
or
from
side
lobes
from
interroga
t
ors
with
ou
t
side
lobe
suppre
ssi
on.
"ON"
function
will
be
th
e c
ust
oma
ry
m
od
e
of
opera
ti
on.
If
an
a
lt
it u
de
digitizer
is
part
of
the
system
then
"AL
T"
funct
i
on
w
ill
be
selec
ted
if
al
ti
t
ude
reporting
is
requested
by
traffic
control.
"ALT"
func
ti
on
ena
b
les
the t
ran
sp
on
der
to
enco
de
a n
alti
t ude
reply.
The
IDENT
feature
is
used
at t
he
req
ue
st of
the
t
raffic
con
t
ro
ll
er . T he ID.ENT
button
is
deprcs~ed
momentarily
and
then
r el
ease
d. A
memory
holds
th
e IDE . T
reply
f
or
an
interval
to
a~
s
ure
th
e
proper
reply
f
or
at l
ea
s t o
ne
ra
d
ar
sweep.
Thi
s
memory
also
turns
the
reply
lamp
on
ste
a
dy
as
an
in
dic
ation
of the
id
en
t f
unc
ti
on.
Page
3-
l