TB 9-6625-2345-35
DEPARTMENT OF THE AMY TECHNICAL BULLETIN
CALIBRATION PROCEDURE FOR
AN/USM-620
(TEKTRONIX, MODEL 495P)
Headquarters, Department of the Army, Washington, DC
27 August 2003
Approved for public release; distribution is unlimited.
REPORTING OF ERRORS AND RECOMMENDING IMPROVEMENTS
You can improve this manual. If you find any mistakes or if you know of a way to
improve these procedures, please let us know. Mail your letter or DA Form 2028
(Recommended Changes to Publications and Blank Forms) directly to: Commander,
U.S. Army Aviation and Missile Command, ATTN: AMSAM-MMC-MA-NP,
Redstone Arsenal, AL 35898-5000. A reply will be furnished to you. You may also
provide DA Form 2028 information to AMCOM via e-mail, fax, or the World Wide
Web. Our fax number is DSN 788-6546 or Commercial 256-842-6546. Our e-mail
address is: 2028@redstone.army.mil. Instructions for sending an electronic 2028
may be found at the back of this manual. For the World Wide Web, use
https://amcom2028.redstone.army.mil.
Paragraph
Page
IDENTIFICATION AND DESCRIPTION
Test instrument identification ............................
Forms, records, and reports.................................
Calibration description ........................................
EQUIPMENT REQUIREMENTS
Equipment required ............................................
Accessories required ............................................
CALIBRATION PROCESS
Preliminary instructions......................................
Equipment Setup .................................................
Calibrator Frequency ...........................................
Calibrator Amplitude...........................................
Self Calibration ....................................................
Marker Frequency and Counter Accuracy .........
Center Frequency Stability .................................
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