TM
11-6625-622-12
INTRODUCTION
Section I. GENERAL
a. Report of Unsatisfactory Equipment.
This manual describes Test Harness, Radio
Use equipment forms and records in accordance
with instructions in TM 38750.
678P2) and covers its operation and operator
and organizational maintenance. The manual
b. Report of Damaged or Improper Shipment.
includes operation under usual and unusual
Fill out and forward DD Form 6 (Report of
conditions, cleaning and inspection of the equip-
Damaged or Improper Shipment) as prescribed
ment, and replacement of parts available to
in AR 700-58 (Army), NAVSANDA Publica-
organizational maintenance personnel.
tion 378 (Navy), and AFR 71-4 (Air Force).
c. Reporting Equipment Manual Improve-
1-2. Index of
Publications
ment. The direct reporting, by the individual
Refer to the latest issue of DA Pamphlet
user, of errors, omissions, and recommendations
3 1 0 - 4 to determine whether there are new
for improving this equipment manual is author-
editions, changes, or additional publications
ized and encouraged. DA Form 2028 will be
pertaining to the equipment. Department of
used for reporting these improvements. This
the Army Pamphlet No. 310-4 is an index of
form may be completed by the use of pencil,
current technical manuals, technical bulletins,
pen, or typewriter. DA Form 2028 will be com-
supply manuals (types 4, 6, 7, 8, and 9), supply
p l e t e d in triplicate and forwarded by the
catalogs (type CL), supply bulletins, lubrication
individual using the manual. The original and
orders, and modification work orders that are
one copy will be forwarded direct to: Com-
available through publications supply channels.
manding General, U . S . Army Electronics
The index lists the individual parts (-10, -20,
Command, ATTN: AMSEL-MR-MA, Fort Mon-
- 3 5 P , etc) and the latest changes to and
mouth, New Jersey 07703. One information
revisions of each equipment publication.
copy will be furnished to the individual's im-
mediate supervisor (officer, noncommissioned
officer, supervisor, etc).
Section II. DESCRIPTION AND DATA
AN/URM-157.
a. Purpose. Test Harness, Radio Set AN/
b. Use. The AN/URM-157 is used by the
repairman to perform bench troubleshooting of
678P-1 and transit case, which together are
the RT-698/ARC-102 (Collins type 618T-3).
designated a 678P-2) provides the means of
connecting and controlling Receiver-Transmit-
1-5. Technical Characteristics
t e r , Radio RT698/ARC-102 (Collins type
a. General.
618T-3) to facilitate testing, troubleshooting,
Ambient temperature
range:
URM-157 controls power, radiofrequency (rf),
and audio signals and facilitates interconnection
Operating
0 C to +50 C.
of system units. An rf wattmeter for measuring
Nonoperating
0 C to +50 C.