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Data updated: 23 Jun 2026.
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Document ID:
MIL-HDBK-231
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Overview
Title:
Encoders Shaft Angle to Digital
Scope:
This handbook describes the operation of contact and non-contact (formerly brush and brushless) shaft-position, analog-to-digital encoders. It contains physical descriptions and illustrations of encoders, techniques used, theory of operation, background information on binary codes, coding principles and limitation, definitions of encoder terminology, and other criteria for selecting an encoder including identification and marking of encoders for military use.
Status:
Active
Document Date:
13-MAR-2024
Next Review Due:
11-MAR-2034
FSC/Area:
5990
Doc Category:
Defense Handbook
Responsibilities
Lead Standardization Activity:
AS
Naval Air Systems Command
Preparing Activity:
AS
Naval Air Systems Command
Coordination:
Full
Army Custodian:
AR
US Army Combat Capabilities Development Command, Armaments Center
Navy Custodian:
AS
Naval Air Systems Command
Air Force Custodian:
85
Air Force Life Cycle Management Center - Electronic Components, Wire and Ca
Changes to military standards or handbooks issued after August 1, 2003 are incorporated in the modified document.
Revision History
Click on column headings for a description of column content.
Media
Document Part Description
Dist Stmt
Document Date
Pages
Size
Revision A Notice 3 - Validation
A
13-MAR-2024
1
1.9 KB
Revision A Notice 2 - Validation
A
07-MAY-2019
1
1.9 KB
Revision A Notice 1 - Validation
A
30-JUL-2014
1
2.0 KB
Revision A
A
30-SEP-1991
342
5438.8 KB
NOTE: It is recommended that you use Adobe Reader v7.0 or higher for optimal download performance; older versions should continue to work, but downloading large files may appear to take longer, so please be patient in those cases.
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Defense Standardization Program
WARNING: UNAUTHORIZED ACCESS TO THIS UNITED STATES GOVERNMENT COMPUTER SYSTEM AND SOFTWARE IS PROHIBITED BY PUBLIC LAW 99-474 (THE COMPUTER FRAUD AND ABUSE ACT OF 1986) AND CAN RESULT IN ADMINISTRATIVE, DISCIPLINARY OR CRIMINAL PROCEEDINGS.