PILOT'S OPEA,ATING
HANDBOOK
SUPPLEMENT
10
DME
(TYPE
1e0)
SUPPLEMENT
DME
(TYPE
19Ol
sEcTroN
I
GENERAL
The DME 190
(Distance
Measuring
Equipment)
system consists
of a
panel
mounted 200 channel UHF
transmitter-receiver
and an
externally
mountod antenna. The transceiver
has a single
seleotor knob that
changes
the DME's mode
of operation
to
provide
the
pilot
with: distance-to-station,
time-to-station,
or
ground
speed
readouts. The DME is
designed to operate
at
altitudes
up
to a maxirnum
of 50,000 feet at
ground
speeds up to
250
knots
and has a
maximum slant rango of
199.9 nautical miles.
The DME can be ohanneled
independently
or by a
remote NAV
set.
When coupted wÍth a remote
NAV 1 sot, the MHz
digits will
be covered
over
by a remole
(REM)
flag and the
DMb will utilize
tbe frequency
set by the
NAV set's channeling knobs.
When the DME
is not coupled with
a remote
NAV
set, the DME
will
reflect the chaunel
selected on the DME
unit.
The
transmitter operates in the frequency
ra,nge of 1041 to
1tã0 MHz
and is
paired
with 108 to 117.95
MHz
to
provide
a,utoma,tic DME channeling.
The
receiver operates in the frequency
range of 978 to IZISM.H:z
and is
paired
with 108
to 117.9õ MHz to
provide
automatic DME channeling.
AII operating
controls
(except
for a
SPEAKER/PHONE
selector
switch mounted on
the audio control
panel
supplied with one
or
two
transmitters as
déscribed in another supplement in this section)
for the
DME
are
mountod
on the front
panel
of the DME and are described
in
Figure
1.
There
is
equipment is
no
change
installod.
SECTION
2
LIMITATIONS
to the airplane limitations
when
this
avionic
30
May 1980
1of4
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