DEPARTMENT OF THE ARMY TECHNICAL BULLETIN
CALIBRATION PROCEDURE FOR
OR TRANSPONDER TEST SET
TS-1809 (AN/APM-123(V)1)
Headquarters, Department of the Army, Washington, DC
8 February 2008
Distribution Statement A: 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 send in your comments electronically to our E-mail address:
2028@redstone.army.mil or by fax 256-842-6546/DSN 788-6546. For the World Wide Web use:
https://amcom2028.redstone.army.mil. Instructions for sending an electronic 2028 can be found at
the back of this manual.
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 ....................................................
Receiver sensitivity.................................................
Video enable delay and gating ...............................
Video reply and comparison pulse width ..............
Comparison pulse position .....................................
Decoder replies........................................................
Read delay and error detector................................
Reply evaluator .......................................................
Transmitter frequency and power .........................
Transmitter pulse characteristics and
challenge ..................................................................
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*This bulletin supersedes TB 9-6625-2163-35, dated 30 July 2003, including all changes.