OPERATION OF VARIABLE FORMAT MESSAGE ENTRY DEVICE AN/GSC-21 WITH SINCGARS GROUND RADIO SETS

TB 11-5820-890-10-4

DEPARTMENT OF THE ARMY TECHNICAL BULLETIN

OPERATION OF VARIABLE FORMAT MESSAGE

ENTRY DEVICE AN/GSC-21 WITH

SINCGARS GROUND RADIO SETS

Headquarters, Department of the Army, Washington, DC

1 APRIL 1993

REPORTING OF ERRORS AND RECOMMENDING IMPROVEMENTS

You can help improve this technical bulletin. If you find any mistakes or if you know of a

way to improve the procedures, please let us know. Mail your letter or DA Form 2028

(Recommended Changes to Publications and blank forms) direct to: Commander, US

Army Communications-Electronics Command and Fort Monmouth, ATTN: AMSEL-LC-

LM-LT, Fort Monmouth, New Jersey 07703-5007. A reply will be furnished direct to you.

Purpose. This technical bulletin provides the information and procedures for operating the Variable Format

Message Entry Device AN/GSC-21 (VFMED) with the SINCGARS family of ground radios. It is necessary that the

operator be properly trained in the operation of the VFMED and SINCGARS. This technical bulletin is a

supplement for the purpose of interoperability.

Application Radio Sets. The radio sets covered by this technical bulletin are AN/VRC-87, AN/VRC-87A, AN/VRC-

88, AN/VRC-88A, ANNRC-89, AN/VRC-89A, AN/VRC-90, AN/VRC-90A, AN/VRC-91, AN/VRC-91A, ANNRC-92,

and AN/VRC-92A.

3. References. Refer to the following technical publications for normal operation and maintenance of the equipment:

TITLE

PUBUCATION NUMBER

DATE

TM 11-7440-253-10-1,

Feb 1990

Message Entry Device, Variable Format,

10-2, 10-3, and 10-4

AN/GSC-21 (VFMED)

TM 11-5820-890-101

1 September 1992

SINCGARS ICOM Ground Combat Net

Radio

TM 11-5820-890-10-3

1 September 1992

SINCGARS NON-ICOM Ground Combat

Net Radio

Approved for public release; distribution is unlimited.