<;!
0
e;;
~
0
co
co
>
0
09/80
LL
Pulse spacing between the frame pulses
F1
and F2 must
be
20.31-Ls
±
0.1/.Ls.
5. The
width
of
a
re
ply pulse must
be
0.45J.Ls
± 0.1
J.LS.
6. The necessary spaclng between the reply
pulses
is
1.45Ms
± 0.1.us"
2.2.6 Checking
Reply
limiting (AOC)
Set
SOUAWK/\IAUT
1
to
max. interrogation recurrence frequency
at
which the transponder must respond
with
min.
1200 replies/s.
2.2.7
Checking
the
SPI
Hold
Time
1.
Briefly
press
the
1
DENT
button
on
the
transponder.
2.
For
approx.
15-
30 seconds,
the
SPI
pulse must appear after
the
last frame pulse
F2
at a spacing
of
4.35J.LS.
2.2.8
Checking
Mode A
Coding
1.
Set
~;ode
0000
on
the
transponder, resu!ting in
only
the
trame pulses
F1
and F2 being visible on the
oscilloscope.
2. Set code
7777, this must produce ali
12
reply pulses
including
the
frame pulses on the oscilloscope.
2.2.9
Checking
Mode C
Coding
If
an
encoding
altimeter
is
connected
to
the transponder, check
with
the aid
of
the
MoA
Gilham code
whether
the coded pulse sequence
agrees
with
the measured
altitude.
If
the encoding altimeter
is
not
connected
to
the transponder
it
transmits
in
mode C operation
the
frame pulses
only.
2.3
Mechanical
Configuration
The transponder ATC
2000
is
designed
for
installation airera
ft
instruMent
panel
or
control
panel. The
dimensions
for
installation
of
the transponder
are
shown in Fig. 2-2.
Fitting
the fastener strips e.g.
on
the
instrument
panel
is
shown in Fig. 2-3. The transponder
is
mounted
after
fitting
the fastener strips
with
the
a id
of
four
OZ
US
fasteners.
2.4
Aire raft
Wiring
The
aircraft
wiring
of
the transponder wgether
with
the
connection
to
the encoding altimeter
is
shown
in Fig.
24
respective! y Fig. 2-5.
The transponder supply
li
nes
must
not
be
loomed
mgether
with
other
equipment looms. 1 n
addition
care
Must be taken
to
avoid running ali transponder vviring in
the
c!ose
vicinity
of
ADF
or
other pulseequipment
looms.
2·3
The document reference is online, please check the correspondence between the online documentation and the printed version.
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