TB 11-6625-2561-35
DEPARTMENT OF THE ARMY TECHNICAL BULLETIN
CALIBRATION PROCEDURE FOR
TRANSMITTER TEST SET
LITCOM MODEL NO. 4400
Headquarters, Department of the Army, Washington, D. C.
23 February 1972
Paragraph
Page
GENERAL
Purpose and scope .............................................................................
Reporting of technical bulletin improvements .....................................
Description
......................................................................................
General instructions............................................................................
CALIBRATION
Equipment required ............................................................................
Preliminary procedure ........................................................................
Power supply PS1 calibration .............................................................
Final procedure ..................................................................................
Section I.
GENERAL
1.Purpose and Scope
a. This bulletin contains calibration instructions for Transmitter Test Set, Litcom Model No. 4400 (transmitter
test set), and is used by maintenance calibration personnel. Since maintenance calibration personnel are trained and
qualified in the use of test and measuring equipment, detailed instructions concerning the operation and use of these
equipments are not contained in this bulletin.
b. Integrated within this bulletin is an illustration which shows front panel controls and indicators.
2. Reporting of Technical Bulletin Improvements
The reporting of errors, omissions, and recommendations for improving this publication by the individual user is
encouraged. Reports should be submitted on DA Form 2028 (Recommended Changes to Publications) and forwarded
direct to Commanding General, US Army Electronics Command, ATTN: AMSEL-MA-CFA, Fort Monmouth, N. J. 07703.
3. Description
The transmitter test set is a portable equipment that provides maintenance support for subassemblies contained in
Transmitting Set, Radio AN/"FRT-76 and Transmitting Set, Radio AN/FRT-77. The transmitter test set enables direct
support maintenance
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