NPFC - MIL-HDBK-237
ELECTROMAGNETIC ENVIRONMENTAL EFFECTS AND SPECTRUM SUPPORTABILITY GUIDANCE FOR THE ACQUISITION PROCESS
|Publication Date:||14 February 1992|
This document is intended to provide managers responsible for the design, development and acquisition of DoD platforms, systems and equipments with the guidance necessary to establish an effective program for achieving the desired degree of EMC. The handbook describes the steps which must be taken to ensure that EMC considerations are incorporated during the life cycle to achieve the desired compatibility for the life cycle of the platform, system, or equipment.
Provisions of this handbook are to be applied by procuring agencies, and by development and operations activities at appropriate times during the life cycle of any platform, system or equipment which emits or which can be susceptible to electromagnetic energy. For example, the handbook is applicable as follows:
a. During acquisition to assure visibility, accountability, and controllability of the EMC effort, as well as its integration into the overall program
b. During the design process to assure a coherent design, management awareness and cost effective tailoring of applicable EMC standards and requirements
It may also be applied by contractors as a guide for establishing and implementing an EMC program during the contract phase.
To assure early consideration of EMC as well as to provide the necessary continuity for achieving and monitoring the required EMC, the guide follows the framework of the life cycle for platforms, systems and equipments. Section 4 describes the overall approach which should be taken during the life cycle for EMC. Section 5 describes specific actions which must be taken by the manager to implement the approach in Section 4. Together these actions describe the steps which must be taken during the life cycle and the responsibilities of the manager for ensuring that his equipment, system, installation or platform is not only compatible within itself (that is, self-compatibility) but has a high probability of continued operation, within acceptable tolerances, with other systems and platforms in its intended EME. The appendices describe in greater detail the various aspects of EMC which are to be implemented by the manager, and include:
∘ EME ∘ Prediction and Analysis ∘ Tailoring General EMC Standards to EM Operational Requirements ∘ Checklist for Major EMC T∂E Planning Considerations (Navy) ∘ EMC Training ∘ Frequency Management and Control ∘ Configuration Management ∘ EMC Considerations in Program Documents ∘ EMC Bibliography for Managers
The electromagnetic environment in which military platforms, systems and equipments must operate is created by a multitude of sources. Primary contributors are intentional, unintentional, friendly and hostile emitters. Electromagnetic pulses, atmospheric, solar and galactic emissions, lightning, and the like, are other sources. The contribution of each emitter to the environment may be described in terms of its technical characteristics, such as power, modulation, frequency, bandwidth and so forth. Effects depend on the receiver's characteristics, relative locations of emitters and receptors, operational concepts, and so forth. However, it can be concluded that the EME can adversely affect all electronic, electro-optical, electrical and electromechanical equipments and systems, personnel, fuels, and weapons.
Various terms have been used to describe the programs established to reduce or prevent adverse effects from electromagnetic energy. These terms include: EMC, EMI, EMV, EMP, ECCM, EM-power, P-static, HERO, EME, E3, HERF, HERP, and RADHAZ. To avoid confusion the term EMC will be used in this document and encompasses any source of electromagnetic energy and any type of potential victim.
EM interactions between elements of a system are termed intra-system EMC whereas EM interactions between systems are inter-system EMC. This concept may be extended to platforms by considering EM interactions between equipments and systems on a platform as intra-platform EMC whereas interactions between the platform and its EM environment or other platforms are considered inter-platform EMC.