TM 11-6625-820-45
CHAPTER 1
FUNCTIONING
Section I. GENERAL FUNCTIONING OF TEST SETS,
RADIO AN/ARM-92 AND AN/ARM-92A
1-2. Block Diagram Functioning of
1-1. Scope
T e s t Set, Radio AN/ARM-92
a. General. This manual contains general
Test Set Radio, AN/ARM-92
a. General.
support and depot maintenance instructions
provides for the complete testing of Radio
for Test Sets, Radio AN/ARM-92 and AN/
Receiving Set AN/ARN-82 (receiving set) when
I t includes instructions appro-
ARM-92A.
used with external test equipment. The test
p r i a t e to these categories of maintenance
set can also be used to test a glide-slope re-
f o r troubleshooting, testing, aligning, and
ceiver, and provides for flag and deviation
repairing the equipment. The manual also
T h e glide-slope test requires a
loading.
lists tools, m a t e r i a l s , and test equipment
special cable that is not supplied with this
for maintenance. Detailed functions of the
unit. The functions of Test Set, Radio AN/
equipment are also covered.
ARM-92 are:
b. Reporting of Equipment Manual Improve-
(1) Power distribution.
ments. The direct reporting of errors, omis-
(2) Phase shifting.
sions, and recommendations for improving this
(3) Current measuring.
equipment manual by the individual user is au-
(4) Compass simulation.
thorized and encouraged. DA Form 2028 (Rec-
(5) Self-test of control unit and func-
ommended Changes to DA Publications) will
tions of the test set.
be used for reporting these improvements. This
b. Power Distribution Circuits. Control, Ra-
form may be completed using pencil, pen, or
dio Set C6873/ARM-82 (control unit), power
typewriter and forwarded direct to Command-
relay K1, and power transformer T1 comprise
ing General, U. S. Army Electronics Com-
the power distribution circuits. The test set con-
m a n d , ATTN: AMSEL-MR-NMP-AD, Fort
nects 27.5 volts direct current (dc) from an
Monmouth, N, J. 07703.
external power source to the control unit which
Note: For other applicable forms and records, see
applies or removes the 27.5 volts dc from the
paragraph 1-3, TM 11-6625-820-12.
remaining power circuits. When the control
unit applies this voltage to the remaining pow-
c. Index of Equipment Publication. R e f e r
er circuits, 27.5 volts dc is applied to Radio
to the latest issue of DA Pam 310-4 to deter-
Receiver R1388/ARN-82 (radio receiver), or
mine whether there are new editions, chang-
to the glide-slope receiver, and to power relay
es or additional publications pertaining to the
K1. The relay then energizes and connects 115
equipment. DA Pam 310-4 is a current index
volts, 400 cycles per second (cps) to power
of technical bulletins, supply bulletins, lubri-
transformer T1. Transformer T1 steps the volt-
cation orders, and modification work orders
age down to 26 volts, 400 cps, which is ap-
available through publications channels. The
plied to the radio receiver. The control unit also
index lists the individual parts (-10, -20, -35P,
supplies the tuning information required by the
etc) and the latest changes and revisions of
radio receiver, or the glide-slope receiver.
each equipment publications.
C h a n g e 2 1-1
