Nav/Com - Cessna 172P Pilot's Operating Handbook And Flight Manual

PII,OT'S OPERATING HANDBOOK
SUPPLEMENT
16
cEsgNA
300
NAV/COM
(TYPE
RT-S8ãA)
SUPPLEMENT
CESSNA
3OO
NAV/COM
l7z0-Channel - Type RT-38541
sEcTloN
1
GENERAL
The
Cessna 300
Nav/Com (Type RT-88õA), shown
in figure
1,
oonsists
of a
panol-mounted
recoiver-transmitter and a single
or
dual-pointer
remoto courae
deviation indioator.
The set includes
a
?Z0-cba{nel
VHF
com¡nunications receiver-
transmltter
and
a
20O-channel
VHF havigation receiver,
both
of
which may
be operated si¡nultaneously. The bommunications receiver-transmitter
rooeives
andtransmits signals
between
118.000
and
13õ.97õ
MHz
in2õ-kHz
steps. The navigation reoeiver receives
omni
and localizer signals
betw€en
108.00
and
117.9õ
MHz
in
50-kHz
steps. The
circuits required
to
interpret
the
omni
and
locallzer signals
are
located
in
the
course
deviation
indicator.
Both
the
communicatioqs
and
navigation operating frequoncies
are
digitally
displayed by
iucandescent
readoutE on the
front panel
of
the
Nav/Com.
A
DME
receivor-transmitter or
a
glide
slope
receiver,
or both,
may
be
interconnected
with
the Nav/Com set
for
automatic seloation
of
the
associated
ÐME
or glide slope frequency. When a VOR frequenoy is
selected
on the Nav/Com, associated VORTAC
or
VOR-DME station
frequency
will
also be selected automatically; llkewise,
if
a localizer
frequency is
selected,
the associated
glide
slope
will
be
selected
automati-
cally.
The course deviation
indicator includes either
a single-poinüer and
related NAV
flag for
VOR/LOC indioation only, or
dual poiuters
and
related NAV
and
GS
flags for both VOR/LOC
and
glide
slope
indications.
Both types of oourse
deviation indioators incorporate
a
back-course
lamp
(BC)
wbicb ligbts
when
optional back course (reversed
sense)
operation is
selected.
Both types may
be
provided with Automatic Radial Centering
whiah, dependlng on how
it
is
selected,
will
a,utoma,tÍca,lly
indicate the
7
bearing
TO or FROM the VOR station.
30
May
1980
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