Downloaded from https://www.everyspec.com 1494 (Application for Equipment Frequency Allocation), in cooper- ation with policies set forth by the Army Spectrum Manager. h. Develop suitable computer hardware/software suites to ade- quately support Army operational requirements for spectrum man- agement and EMC. Overall system compatibility between spectrum-dependent systems must be assured. 3–3. Management Requirements for Achieving Electromagnetic Compatibility (EMC) a. The Army considers EMC an essential characteristic of spec- trum-dependent equipment in the same sense as reliability and the ease of maintenance.
Thus, EMC analyses must be conducted to support each step of the design, development, acquisition, and use of this equipment. b.
As a time cost consideration, prior to entering any of the four phases of the Life Cycle System Management Model (LCSMM) or p r o c u r i n g c o m m e r c i a l o f f - t h e - s h e l f ( C O T S ) s p e c t r u m - d e p e n d e n t equipment, it is highly recommended that concept evaluators, PEOs, PMs, combat developers, and, in some cases, units themselves re- quest that a spectrum supportability assessment be conducted to determine if the proposed concept or requirement will meet spec- trum supportability and equipment compatibility requirements in all CONUS and/or OCONUS environments (see Chapter 4). c.
Each active Army, ARNGUS, and USAR organization and each individual that participates in managing the acquisition and use of spectrum-dependent equipment must stress the need to achieve EMC by accomplishing the following actions: (1) Implement EMC decisions and actions during the LCSMM. EMC decisions and actions that occur during the four phases of the LCSMM are: (a) Concept Exploration and Definition Phase. 1. For telecommunications equipment, there are two major mile- stones in the Concept Exploration Phase. The first milestone is the preliminary selection of the frequency band, including spectrum supportability, type of channelization, and other main characteristics of the system.
The second milestone is the submission of a Stage 1, 2, and 3 DD Form 1494. Ensure the DD Form 1494 contains sufficient data for a subsequent review and evaluation of spectrum supportability. If required, obtain a spectrum assignment for experi- mental testing. Obtain an approved Stage 3 application or waiver for Milestone I Army Systems Acquisition Review Council or appropri- ate In-Progress Review (IPR). 2. For non-telecommunications systems (e.g., generators, vehicle motors, etc.) which do not use the spectrum, determine system technical characteristics.
This determination must contain sufficient information to permit evaluation of the potential for unintentional susceptibility or unintentional radiation interference to the environ- ment where their equipment will be operating. (b) Demonstration and Validation Phase. 1. For this phase, first prepare the EMC-related portion of the equipment performance specifications for the prototype equipment. Second, develop plans for the EMC portion of developmental and operational test. Third, review results of EMC testing as part of Development Test (DT) and Operational Test (OT).
Fourth, verify that potential EMC problems have been averted or can be expected to be resolved during engineering development. 2. Before Milestone II or appropriate IPR, the Stage 4 DD Form 1494 or waiver must be approved. The DD Form 1494 and all further forms must include the new data if there are changes to previously approved frequency allocations. ( c ) E n g i n e e r i n g a n d M a n u f a c t u r i n g D e v e l o p m e n t P h a s e . F o r EMC considerations and actions, complete the following actions: 1 . P r e p a r e E M C p o r t i o n s o f e q u i p m e n t d e v e l o p m e n t specifications. 2. Prepare EMC portions of test plans for DT and OT. 3. Review EMC test results.
4. Verify EMC performance. 5. Prepare EMC portions of equipment specifications for initial production. 6. Obtain an operational frequency assignment if required. 7. Approve TOE material and training material. (d) Production and Deployment Phase. For EMC considerations and actions, first prepare EMC portions of the production equipment specifications. Then verify performance by reviewing operational performance reports and reports of interference or EW. 2–31. Special Frequency Responsibilities for Units, Organizations, and Activities Each unit, organization, or activity authorized to use frequencies will— a.
Assure that an authorization document for each spectrum re- source used is retained by the operating activity. b. Forward requests for renewal of temporary spectrum assign- ments at least 60 days prior to the expiration date. c. Provide the information required by AR 380-5 for classified spectrum assignments. d. Assure that the operation of communications-electronics (C- E 3 ) equipment complies with the spectrum authorization limitations and tolerances. e. Assure that current Army directives and procedural publica- t i o n s c o n c e r n i n g s p e c t r u m m a n a g e m e n t a r e a v a i l a b l e a n d b e i n g followed. f.
Review spectrum authorizations annually and identify those no longer required to the supporting AFC for deletion. g. Identify to the supporting AFC or the USACESO the unit point of contact for all spectrum matters. Chapter 3 Army Electromagnetic Compatibility, Deconfliction, and Interference Control Programs 3–1. Introduction a. Since the primary spectrum management objective is efficient use of authorized spectrum resources, the effects of the electromag- netic environment must be considered when developing spectrum- dependent materiel. b.
As the spectrum becomes congested with more users, and as the spectrum is reallocated away from military use, the capability of equipment to operate without causing or experiencing unacceptable EMI becomes critical. The term used for the process of reducing EMI and thus optimizing the use of the spectrum for the spectrum m a n a g e m e n t , i n t e l l i g e n c e a n d E W ( I E W ) c o m m u n i t i e s i s deconfliction. c. The Army continues to assess measures for implementing the enforcement of proper spectrum use.
Army users of the spectrum rely upon spectrum sharing agreements with other agencies, host nations, the FCC, and other Services in order to meet their increas- ing spectrum requirements. Increases in the density of spectrum- dependent equipment operating in the same bands result in increased operational conflict and a higher potential for interference. Without proper application of deconfliction procedures for the control of interference, operational failures will occur and liability claims may result from interference to commercial systems. 3–2.
Scope This chapter applies to all active Army, ARNG, and USAR opera- tions and the operation of spectrum dependent equipment required by the materiel development community involved. Such operations involve equipment herein defined as that designed to function using the radio frequency electromagnetic spectrum. Secondary effects of e l e c t r o m a g n e t i c i n t e r f e r e n c e ( E M I ) t o o r f r o m e l e c t r i c o r e l e c t r o m e c h a n i c a l e q u i p m e n t , i . e . , c o m p u t e r s o r e l e c t r i c m o t o r s , which are not intended to use the electromagnetic spectrum, are the responsibility of the Army E3 and equipment development organiza- tions.
The environmental effects of these devices must be consid- ered and minimized through system analysis and design concepts. 10 AR 5–12 • 1 October 1997