1-2
ATC
Autornatic
Overload
Cor1Lrul
(AOC)
Dead
time
Decoder
DME suppression
Echo suppression
Ernergency
Encoder
IDE
NT
Identification
1 nterrogati on
1 nterrogation
Recurrence F requency (
1 RF)
Moa Gilham code
Mode
MTL
Minimum
Triggering Leve!
REPLY
SI:)
Y
Standby
Air
T raffle
Control
Circuit
limiting
the numbor
of
replies
to
1200/sec
so
that
the
transmitting
tube is
not
overloaded
Time
during
which
the
uansponder
cannat
handle
any more replies after receiving interrogations
for
at
least the
time
corresponding
to
the
transponder
re
ply
This
is
a
circuit
in
the transponder
for
decoding and
evaluating
the
information
contained in the
inter-
rogation
Circuit
for
suppressing a DME
output
signal
during
the
transponder response
or
for
bi ocking the
trans-
ponder
for
the
duratior1
of
a
DME
output
signal
This
is
a
circuit
in the transponder
for
suppressing
the
echo impulses between
interrogation
pulses
P1
and
P3
Special reply
of
the transponder indicating
that
the
aircraft
is
in
an
emergency sit11ation (coding
76
...
or
77
...
)
Circuit
in
the
transponder
for
generating the
reply
pulses (in accord ance
with
the set code)
On request
of
Air
Traffic
Control the
pilot
presses
the
1
DENT
button
on
the
transponder
to
initiate
a
special
identification
pulse identi fying his
aircraft
among others
transmitting
on the
same
code
1 his
1s
the process in which a ground station beams
out
pulses
by
means
of
a directional aerial
to
trigger
a transponder reply
Number
of
pulse pairs generated
by
a
SSR
per second
Coding system
for
mode C height interrogation
Designation
for
interrogation code defined
by
the
spacing
of
bath
pulses
of
an
interrogation pulse
pair
(8J..LS
in
mode
A,
17J..LS
in mode B and
21J..LS
in
mode
C)
MiriÎriiUIIl
~Î\Jlldl
level
of
a
standar~d
r11airi-Iobe
irller-
rogation measured
at
the receiver
input
required
to
maintain a
90
percent reply effiency
Wh
en
the
transponder
responds
to
an
interrogation
the
reply
lamp
lights
up
This
is
the
standby
position
of
the transponder mode
switch in
which
the transponder
is
not
on
the
air
but
is
instantly
ready
for
operation
without
warm-up time
09/80
"
c:
c:
0:
0:
The document reference is online, please check the correspondence between the online documentation and the printed version.
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