1. Department of Defense Interface Standard MIL-STD-464C Overview
Joint Spectrum Center
E3 & Spectrum Engineering Division, OS35
October 2018

2. Responding to increasing criticism, Secretary of Defense William Perry issued a memorandum in 1994 that effectively eliminated the use of most defense standards. This has become known as the "Perry memo". Many defense standards were cancelled. In their place, the DOD encouraged the use of industry standards, such as ISO 9000 series for quality assurance. MIL-STD-464 was developed as an “Interface Standard” to allow usage without a waiver.
The E3 area addresses a number of interfacing issues with environments both external to the system and within the system.
External to the system are electromagnetic effects such as lightning, EMP and man-made RF transmissions.
Internal to the system are EM effects such as electronic noise emissions, self-generated RF transmissions from antennas, and cross-coupling of electrical currents.
In addition, RF systems today are complex due to composite materials being used in Navy ships and aircraft. Many materials being used today are nonmetallic (composites) and have unique EM properties that require careful consideration.
Electronic systems performing critical functions are common. Wide use of RF transmitters, sensitive receivers, and sensors create a potential for problems within the system and from external influences. Increasing use of commercial equipment in unique military operational environments poses special interface considerations.
Each system must be compatible with itself, other systems, and the external environment to ensure required performance.

3. MIL-STD-464C What it provides: What it does not provide:
E3 interface requirements
Verification criteria
Applies to airborne, sea, space, and ground systems, including associated ordnance
Applies to complete systems, new and modified E3
Requirements
and
Guidance
Go/No-Go
Pass/Fail
Procedures
What it does not provide:
Go/No-Go or Pass/Fail test procedures
MIL-STD-464C does not provide procedures; it provides guidance and levels to measure against. Other standards or testing procedures are used to do the actual testing.
A standard to establish requirements for how systems must interface with each other in the Electromagnetic Environmental Effects (E3) arena

4. MIL-STD-464C Format MAIN BODY APPENDIX
(Specifies a base line set of requirements)
Definitions
General Requirements
Detailed Requirements
Notes
APPENDIX
Requirements (repeats standard in italics)
Rationale
Guidance
Lessons Learned
Verification
This standard contains two sections, the main body and an appendix.
The main body of the standard specifies a baseline set of requirements. Defines E3 requirements and gives specifics to different categories, e.g. Intra system EMC, Shipboard internal EME, external RF EME and E3 Disciplines. “Notes” includes Data Item Descriptions, Tailoring guidance, references to similar NATO documentation and points of contact
The appendix portion provides rationale, guidance, and lessons learned for each requirement to enable the procuring activity to tailor the baseline requirements for a particular application. The appendix also permits Government and Industry personnel to understand the purpose of the requirements and potential verification methodology for a design. The appendix is not a mandatory part of this document but is critical to understanding the standard.

5. E3 Requirements External to System Internal to System EMP Lightning
External RF EME
EME issues
Unintentional conducted and radiated EM emissions
Self-generated RF transmissions from antennas
Cross coupling of electrical currents
Internal to System
E3 addresses a number of interfacing issues with internal and external environments as illustrated in the slide.
External to the system are electromagnetic effects such as lightning, EMP and the external RF EME.
Internal to the system are electromagnetic effects such as electronic noise emissions, self-generated RF transmissions from antennas, and cross-coupling of electrical currents between equipment and subsystems of the system.

6. Factors Affecting System Level EMC
Non-metallic materials with unique electro-magnetic properties
Factors
Critical functions now depend on electronics
Each system to be compatible with itself, other systems & external environments
Systems today are complex from a materials usage and electronics standpoint.
Many materials being used are nonmetallic and have unique electromagnetic properties which require careful consideration.
Electronics performing critical functions are common.
Wide use of RF transmitters, sensitive receivers, other sensors, and additional electronics creates a potential for problems within the system and from external influences.
Increasing use of commercial equipment in unique military operational environments poses special interface considerations.
Each system must be compatible with itself, other systems, and external environments to ensure required performance and to prevent costly redesigns for resolution of problems.
Wide use of RF transmitters, sensitive receivers, other sensors
Increasing use of commercial equipment in unique military environment

7. E3 Integration & Analysis
System Level Approach
Initial Design
E3 Integration & Analysis
Reports
NATO ANEP 45
DOT/FAA/CT-86/40
SAE ARP4242
ADS-37A-PRF
MIL-HDBK-237
An overall integrated EMC design and verification approach must be established
Requirements should be addressed from the initial design stages.
System E3 Integration and Analysis Reports are used to aid in the technical management
Additional guidance on E3 can be found in:
MIL-HDBK-237
DOT/FAA/CT-86/40
SAE ARP4242
Army ADS-37A-PRF
NATO ANEP 45 (limited scope; not general E3 guidance)
A variety of documents listed in the Appendix

8. The E3 integration approach can be organized into five activities
Establish the external threat environment.
The E3 integration approach can be organized into five activities
Identify system performing functions required during application of the external threat.
Establish the internal environment.
Design the system and equipment protection.
Verify the protection adequacy.

9. How to enroll for the FULL Introduction to MIL-STD-464, EMC Requirements for Platforms Course
This has been an introduction to our full MIL-STD-464 course. For more information on how to enroll in the full course, go to:
(Forms page to sign up for the full course)
This 1-day course explains the evolution of MIL-STD-464 and the system level E3 requirements it mandates. The course describes the application and use of the baseline requirements provided in the standard and covers the E3 interface and performance requirements and verification criteria for airborne, sea, space, and ground systems, including ordnance.  Also discussed are the use of tailoring, application of margins, and the effects of the increasing use of commercial items (CI) and non-development items (NDI) in military operational environments.
Course Outline:
Scope
Description of Standard
Applicable Documents
Definitions
Purpose of Standard
General Requirements
Detailed Requirements
Development of MIL-STD-464
Data Item Descriptions (DIDs)
To schedule a session at your location,
(Main Spectrum/E3 training page)