DEPARTMENT OF THE ARMY TECHNICAL BULLETIN
CALIBRATION PROCEDURE FOR
RADIO TEST SET, AN/GRM-114A
(IFR, MODEL FM/AM-1100S)
Headquarters, Department of the Army, Washington, DC
20 May 2014
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-MSS-LP, 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 ..................................................
Frequency accuracy ..............................................
Dual tone generator .............................................
Output level ..........................................................
Oscilloscope alignment.........................................
Oscilloscope timing and bandwidth ....................
Oscilloscope gain ..................................................
Oscilloscope deviation and frequency error ........
Deviation meter and residual FM .......................
Spectrum analyzer signal strength .....................
Spectrum analyzer centering and bandwidth ....
___________
*This technical bulletin supersedes TB 9-6625-2059-24, dated 1 October 2008, including all changes.