TM
11-6625-820-12
Common Names
power cable, is located at the rear of the test
set.
All controls, switches, indicators, and
meters are located on the front panel.
Nomenclature
Common name
b. Control, Radio Set C-6873/ARN-82. T h e
Test Set, Radio TS-2500/ARM-92
Test set.
control unit (fig. 11) mounts in the center of the
Test Set, Radio TS-2500A/ARM-92
Test set.
test set front panel.
The power switch is con-
Test set cover.
Cover, Test Set CW-878/ARM-92
Test Set, Wiring Harness, Aircraft
Aid box.
centric with the megacycle selector, and the VOL
TS-2501/ARM-92.
(volume) control is concentric with the kilocycle
Control, Radio Set C-6873/ARN-82
Control unit.
selector. These controls, selectors and switches
OBS indicator.
Indicator, Course ID-1347/ARN-82
remotely control the power, frequency and volume
OBS indicator.
Indicator, Course ID-1347A/
ARN-82
of the receiver. The frequency indicator on the
Radio magnetic
Indicator, RMI ID-250A/ARN
control unit front panel displays the frequency to
indicator
which the receiver is tuned. All electrical connec-
(RMI).
Cable Assembly, Power, Electrical Power cable.
tions between the control unit and the test set are
CX-11568/ARM-92.
made through a connector on the back of the
control unit. This control unit is also a part
of Radio Receiving Sets AN/ARN-82 and AN/
Description
of
Test
Sets,
Radio
AN/
ARN-82A.
ARM-92 and AN/ARM-92A
c. Indicator,
RMI
ID-250A/ARN. T h e
RMI
Test Sets, Radio AN/ARM-92 and AN/
of the test set front panel. The RMI will give
ARM-92A include a test set (fig. 1-1 or fig.
three indications, but the test set utilizes only
1-1.1) and an aid box (fig. 1-2).
two of the indications. Each of the two needles
a. The test set of Test Set,
Radio
AN/
on the RMI can indicate the bearing signals re-
ARM-92
1-6), used without the aid
ceived
from
two
separate
receivers.
But
when
box,
performs
operational checks on Radio
the RMI is used in the test set, both needles
Receiver R-1388/ARN-82 (receiver).
The
indicate the same bearing signal received from
test set of Test Set, Radio AN/ARM-92A
one receiver. The entire dial on the RMI rotates
(para 1-6.1), used without the aid box, per-
to
indicate
a
magnetic
heading.
All
electrical
forms operational checks on Radio Receivers
connections between the RMI and the test set
R-1388/ARN-82
and
R-1388A/ARN-82
(re-
are made through a connector on the back of
ceivers).
the RMI.
b. T h e a i d b o x , u s e d w i t h o u t t h e t e s t s e t , c h e c k s
d.
Indicators,
Course
ID-1347/ARN-82
and
the wiring harness in an aircraft installation.
ID-1347A/ARN-82.
The
OBS
indicator
(fig.
c. T h e t e s t s e t , u s e d t o g e t h e r w i t h t h e a i d b o x ,
1-1) mounts on the center left-hand side of
provides operational checks for the control unit.
the test set front
panel. It has a nonreflect-
While connected to the test set, the aid box also
ing black finish
with white markings and
provides performance checks for various circuits
pointers, and red warning
flags with black
in the test set.
markings.
The dial glass
has an antistatic
The OBS indica-
and
antireflective
coating.
Description
of
Major
Assemblies
tor, which is
also
a
part
of
Radio Receiving
a.
Test
Sets,
Radio
TS-2500/ARM-92
and
Set AN/ARN-82 or AN/ARN-82A, adjusts the
TS-2500A/ARM-92.
The test sets (fig. l-l)
receiver to select a desired course from a
are portable and can be used wherever 27.5-
simulated
very
high
frequency
omni-direc-
volts dc and 115-volts, 400-cps power is
tional
radio
range
(VOR)
signal.
available. When the test set cover is raised
e. Test Set, Wiring Harness, Aircraft TS-2501/
or removed, the sloping front panel of the
A R M - 9 2 . The
aid
box
1-2)
is
removed
test set is exposed.
The test set is used
while mounted in the lower half of its fiber-
from its storage place in the test set cover for
use. When the protective cover on the aid box
glass case.
A pendant cable from the test
is removed, all the connectors and indicators on
set provides all circuit connections between
A storage
the receiver and the test set.
the top panel are exposed. The connectors pro-
compartment for this cable, and for the
vide all the electrical connections required by
3 1-3
Change
