TM 11-6625-2709-40
FUNCTIONING
Section I. GENERAL FUNCTIONING OF RADIO TEST SET AN/ARM-92B
1-1. Scope
This manual contains general support mainte-
vides for complete testing of Radio Receiving Sets
nance instructions for Radio Test Set AN/ARM-
AN/ARN-82, AN/ARN-82A, AN/ARN-82B, and
AN/ARN-123(V) (receiving set) when used with
92B. It includes instructions appropriate to these
external test equipment. The test set can also be
categories of maintenance for troubleshooting,
testing, aligning, and repairing the equipment.
used to test Radio Receiver R-1963/ARN (GS/MB
receiver) and provides for flag and deviation
The manual also lists tools, materials, and test
loading. The functions of Radio Test Set AN/
equipment for maintenance. Detailed functions of
the equipment are also covered.
ARM-92B are as follows:
NOTE
(1) Power distribution
(2) Phase shifting
For other applicable forms and records,
refer to paragraph 1-3, TM 11-6625-820-12.
(3) Resolver signal transmission
(4) Current measuring
(5) Compass simulation
(6) Self-test of control unit and functions of the
a. DA Pam 310-4. Refer to the latest issue of DA
test set
Pam 310-4 to determine whether there are new
editions, changes, or additional publications per-
b. Power Distribution Circuits. Radio Set Control
taining to the equipment.
C-6873/ARN-82 (control unit), power relay K1, and
b. DA Pam 310-7. Refer to DA Pam 310-7 to
power transformer T1 comprise the power distri-
determine whether there are modification work
bution circuits. The test set connects 27.5-volt
orders (MWO's) pertaining to the equipment.
direct current (dc) from an external power source
to the control unit, which applies or removes the
Recommendations (EIR)
27.5 volts dc from the remaining power circuits.
When the control unit applies this voltage to the
If your Radio Test Set AN/ARM-92B needs
remaining power circuits, 27.5 volts dc is applied to
improvement, let us know. Send us an EIR. You,
the radio receiver being tested, or to the GS/MB
the user, are the only one who can tell us what you
receiver, and to power relay K1. The relay then
don't like about your equipment. Let us know why
energizes and connects 115 volts, 400 Hz to power
you don't like the design. Tell us why a procedure is
transformer T1. Transformer T1 steps the voltage
hard to perform. Put it on an SF 368 Form (Quality
down to 26 volts, 400 Hz, which is applied to the
Deficiency Report). Mail it to Commander, US
radio receiver. The control unit also supplies the
Army Communications and Electronics Materiel
tuning information required by the radio receiver
Readiness Command, ATTN: DRSEL-ME-MQ,
or the GS/MB receiver.
Fort Monmouth, NJ 07703. We'll send you a reply.
c. Phase-Shifting Circuits. The phase-shifting
Test Set AN/ARM42B
circuits consist of precision bearing transformers
T2 and T3, Course Indicator ID-1347C/ARN-82
a. General. Radio Test Set AN/ARM-92B pro-
(OBS), MODE switch S3, BEARING switch S4, and
Change 2 1-1
