Cessna 152 - Supplement: Cessna 300 Transponder and Altitude Encoder (Blind)

PILOT'S
OPERA TING HANDBOOK
SUPPLEMENT
CESSNA 300 TRANSPONDER
AND
ALTITUDE ENCODER (BLIND)
SUPPLEMENT
CESSNA
300
TRANSPONDER
(Type
RT-359A)
AND
OPTIONAL
ALTITUDE
ENCODER
{BLIND)
SECTION
1
GENERAL
The
Cessna
300
Transponder
(Type RT-359A), shown
in
Figure
1,
is
the
airborne
component
of
an
Air
Traffic
Control
Radar
Beacon
System
(ATCRBS). The
transponder
enables
the
ATC
ground
controller
to
"see"
and
identify
the
aircraft,
while
in
flight, on
the
control
center's
radarscope
more
readily.
The
Cessna
300
Transponder
system
consists
of a
panel-mounted
unit
and
an
externally-mounted
antenna.
The
transponder
receives
interroga-
tion
pulse
signals
on 1030 MHz and
transmits
pulse-train
reply
signals
on
1090 MHz. The
transponder
is
capable of
replying
to
Mode A
(aircraft
identification)
and
also
Mode C
(altitude
reporting)
when
coupled
to
an
op-
tional
altitude
encoder
system.
The
transponder
is
capable
of
replying
on
both
modes
of
interrogation
on a
selective
reply
basis
on any
of
4, 096
in-
formation
code
selections.
The optional
altitude
encoder
system
(not
part
of
a
standard
300
Transponder
system)
required
for
Mode C
(altitude
re-
porting)
operation
consists
of a
completely
independent
remote-mounted
digitizer
that
is
connected
to the
static
system
and
supplies
encoded
al-
titude
information
to
the
transponder.
When
the
altitude
encoder
system
is
coupled
to
the
300
Transponder
system,
altitude
reporting
capabilities
are
available
in
100-foot
increments
between
-1000
and
+20, 000
feet.
All
Cessna
300
Transponder
operating
controls
are
located
on the
front
panel
of
the
unit.
Functions
of
the
operating
controls
are
described
in
Figure
1.
1
July
1978
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of
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