TM 11-6625-3087-12
INTRODUCTION
Section I.
GENERAL INFORMATION
1 - 1 . SCOPE.
a. Type of Manual: Operator's and Organizational Maintenance Manual.
b. Equipment Name and Model Number: Frequency Selective Level Meter AN/USM-490.
c. Purpose of Equipment: The Level Meter is designed for use in installation and maintenance of Frequency Domain
Multiplexing (FDM) Systems, wave analysis, frequency synthesis, carrier frequency, and voice channel measurements.
1-2. CONSOLIDATED INDEX OF ARMY PUBLICATIONS AND BLANK FORMS.
Refer to the latest issue of DA Pam 310-1 to determine whether there are new editions, changes, or additional publications
pertaining to the equipment.
1-3. MAINTENANCE FORMS, RECORDS, AND REPORTS.
a Report of Maintenance and Unsatisfactory Equipment. Department of the Army forms and procedures used for
equipment maintenance will be those prescribed by DA PAM 738-750 as contained in Maintenance Management Update.
b. Report of Packaging and Handling Deficiencies. Fill out and forward SF 364 (Report of Discrepancy) as prescribed in
AR 735-1102/DLAR 4140.55/NAVMATINST 4355.73B/AFR 400-54/MCO 4430.3H.
c. Discrepancy in Shipment Report (DISREP) (SF 361). Fill out and forward Discrepancy in Shipment Report (SF
361) as prescribed in AR 55-38/ NAVSUPINST 4610.33C/ AFR 75-18/ MCO P4610.19D/DLAR 4500.15.
1-4. ADMINISTRATIVE STORAGE.
Refer to TM 740-90-1 for administrative storage procedures.
1-5. DESTRUCTION OF ARMY ELECTRONICS MATERIEL.
Destruction of Army electronics materiel to prevent enemy use shall be in accordance with TM 750-244-2.
1-6. REPORTING EQUIPMENT IMPROVEMENT RECOMMENDATIONS (EIR)
If your equipment needs improvement, let us know. Send us an EIR. You, the user, are the only one who can tell us
what you don't like the design. Put it on an SF 368 (Quality Deficiency Report). Mail it to Commander, US Army
Communications-Electronics Command and Fort Monmouth, ATTN: AMSEL-PA-MA-D, Fort Monmouth, New
Jersey 07703-5000. We'll send you a reply.
1-7. WARRANTY INFORMATION.
The AN/USM-490 is warranted by Hewlett-Packard Company for one year. Warranty starts on the date of shipment to the
original buyer. Report all defects in material or workmanship to your supervisor who will take appropriate action.
1-8. NOMENCLATURE CROSS-REFERENCE LIST.
Common names will be used when major components of the Frequency Selective Level Meter are mentioned in this manual.
NOTE
Official nomenclature must be used when filling out report forms or looking up Technical
Manuals.
Official Nomenclature
Common Name
Frequency Selective Level Meter AN/USM-490
Level Meter
Frequency Selective Level Meter AN/USM-490
AIWUSM-490
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