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METRIC
MIL-STD-461F
10 December 2007
SUPERSEDING
MIL-STD-461E
20 August 1999
___________________________
DEPARTMENT OF DEFENSE
INTERFACE STANDARD
REQUIREMENTS FOR THE CONTROL OF
ELECTROMAGNETIC INTERFERENCE
CHARACTERISTICS OF SUBSYSTEMS AND
EQUIPMENT
AMSC 9034
AREA EMCS
DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited.
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MIL-STD-461F
FOREWORD
1. This standard is approved for use by all Departments and Agencies of the Department of
Defense.
2. Comments, suggestions, or questions on this document should be addressed to
ASC/ENOI, 2530 Loop Road W, Wright-Patterson AFB OH 45433-7101, or emailed to
Engineering.Standards@wpafb.af.mil.
Since contact information can change, you may want to
verify the currency of this address information using the ASSIST Online database at
http://assist.daps.dla.mil/.
3. The stated interface requirements are considered necessary to provide reasonable confidence
that a particular subsystem or equipment complying with these requirements will function within
their designated design tolerances when operating in their intended electromagnetic environment
(EME). The procuring activity should consider tailoring the individual requirements to be more
or less severe based on the design features of the intended platform and its mission in concert
with personnel knowledgeable about electromagnetic compatibility (EMC) issues affecting
platform integration.
4. An appendix is included which provides the rationale and background for each requirement
and verification section.
5. A committee consisting of representatives of the Army, Air Force, Navy, other DoD agencies,
and industry prepared this document.
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MIL-STD-461F
CONTENTS
PARAGRAPH
PAGE
1. SCOPE ...................................................................................................................................... 1
1.1 Purpose. ............................................................................................................................ 1
1.2 Application. ...................................................................................................................... 1
1.2.1 General applicability. ............................................................................................. 1
1.2.2 Tailoring of requirements. ...................................................................................... 1
1.3 Structure............................................................................................................................ 1
1.4 Emission and susceptibility designations. ........................................................................ 1
2. APPLICABLE DOCUMENTS............................................................................................... 3
2.1 General.............................................................................................................................. 3
2.2 Government documents. ................................................................................................... 3
2.2.1 Government documents, drawings, and publications............................................. 3
2.3 Non-Government publications.......................................................................................... 3
2.4 Order of precedence.......................................................................................................... 4
3. DEFINITIONS ......................................................................................................................... 5
3.1 General.............................................................................................................................. 5
3.2 Acronyms used in this standard........................................................................................ 5
3.3 Above deck. ...................................................................................................................... 5
3.4 Below deck. ...................................................................................................................... 5
3.5 External installation.......................................................................................................... 6
3.6 Flight-line equipment. ...................................................................................................... 6
3.7 Internal installation. .......................................................................................................... 6
3.8 Metric units....................................................................................................................... 6
3.9 Non-developmental item (NDI)........................................................................................ 6
3.10 Safety critical. ................................................................................................................. 6
3.11 Test setup boundary........................................................................................................ 6
4. GENERAL REQUIREMENTS .............................................................................................. 7
4.1 General.............................................................................................................................. 7
4.2 Interface requirements. ..................................................................................................... 7
4.2.1 Joint procurement. .................................................................................................. 7
4.2.2 Filtering (Navy only).............................................................................................. 7
4.2.3 Self-compatibility. .................................................................................................. 7
4.2.4 Non-developmental items (NDI)............................................................................ 7
4.2.4.1 Commercial items (CI). ....................................................................................... 7
4.2.4.1.1 Selected by contractor...............................................................................................7
4.2.4.1.2 Specified by procuring activity. ...............................................................................7
4.2.4.2 Procurement of equipment or subsystems having met other EMI
requirements. ................................................................................................. 8
4.2.5 Government furnished equipment (GFE). .............................................................. 8
4.2.6 Switching transients. .............................................................................................. 8
4.2.7 Interchangeable modular equipment ...................................................................... 8
4.3 Verification requirements. ................................................................................................ 8
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MIL-STD-461F
CONTENTS
PARAGRAPH
PAGE
4.3.1 Measurement tolerances. ........................................................................................ 8
4.3.2 Shielded enclosures. ............................................................................................... 9
4.3.2.1 Radio Frequency (RF) absorber material. ........................................................... 9
4.3.3 Other test sites. ....................................................................................................... 9
4.3.4 Ambient electromagnetic level............................................................................... 9
4.3.5 Ground plane. ....................................................................................................... 10
4.3.5.1 Metallic ground plane........................................................................................ 10
4.3.5.2 Composite ground plane.................................................................................... 10
4.3.6 Power source impedance. ..................................................................................... 10
4.3.7 General test precautions. ...................................................................................... 10
4.3.7.1 Accessory equipment......................................................................................... 10
4.3.7.2 Excess personnel and equipment....................................................................... 10
4.3.7.3 Overload precautions......................................................................................... 11
4.3.7.4 RF hazards. ........................................................................................................ 11
4.3.7.5 Shock hazard. .................................................................................................... 11
4.3.7.6 Federal Communications Commission (FCC) restrictions................................ 11
4.3.8 EUT test configurations........................................................................................ 11
4.3.8.1 EUT design status.............................................................................................. 11
4.3.8.2 Bonding of EUT. ............................................................................................... 11
4.3.8.3 Shock and vibration isolators. ........................................................................... 11
4.3.8.4 Safety grounds. .................................................................................................. 11
4.3.8.5 Orientation of EUTs. ......................................................................................... 11
4.3.8.6 Construction and arrangement of EUT cables................................................... 12
4.3.8.6.1 Interconnecting leads and cables............................................................................12
4.3.8.6.2 Input (primary) power leads. ..................................................................................12
4.3.8.7 Electrical and mechanical interfaces. ................................................................ 12
4.3.9 Operation of EUT. ................................................................................................ 13
4.3.9.1 Operating frequencies for tunable RF equipment. ............................................ 13
4.3.9.2 Operating frequencies for spread spectrum equipment. .................................... 13
4.3.9.3 Susceptibility monitoring. ................................................................................. 13
4.3.10 Use of measurement equipment. ........................................................................ 13
4.3.10.1 Detector. .......................................................................................................... 13
4.3.10.2 Computer-controlled instrumentation. ............................................................ 14
4.3.10.3 Emission testing............................................................................................... 14
4.3.10.3.1 Bandwidths............................................................................................................14
4.3.10.3.2 Emission identification. ........................................................................................14
4.3.10.3.3 Frequency scanning. .............................................................................................14
4.3.10.3.4 Emission data presentation. ..................................................................................15
4.3.10.4 Susceptibility testing. ...................................................................................... 15
4.3.10.4.1 Frequency scanning. .............................................................................................15
4.3.10.4.2 Modulation of susceptibility signals. ...................................................................15
4.3.10.4.3 Thresholds of susceptibility..................................................................................15
4.3.11 Calibration of measuring equipment. ................................................................. 16
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MIL-STD-461F
CONTENTS
PARAGRAPH
PAGE
4.3.11.1 Measurement system test................................................................................. 16
4.3.11.2 Antenna factors................................................................................................ 16
5. DETAILED REQUIREMENTS........................................................................................... 24
5.1 General............................................................................................................................ 24
5.1.1 Units of frequency domain measurements. .......................................................... 24
5.2 EMI control requirements versus intended installations. ............................................... 24
5.3 Emission and susceptibility requirements, limits, and test procedures. ......................... 24
5.4 CE101, conducted emissions, power leads, 30 Hz to 10 kHz. ....................................... 27
5.4.1 CE101 applicability. ............................................................................................. 27
5.4.2 CE101 limits......................................................................................................... 27
5.4.3 CE101 test procedure. .......................................................................................... 27
5.4.3.1 Purpose. ............................................................................................................. 27
5.4.3.2 Test equipment. ................................................................................................. 27
5.4.3.3 Setup. ................................................................................................................. 27
5.4.3.4 Procedures. ........................................................................................................ 28
5.4.3.5 Data presentation. .............................................................................................. 28
5.5 CE102, conducted emissions, power leads, 10 kHz to 10 MHz..................................... 35
5.5.1 CE102 applicability. ............................................................................................. 35
5.5.2 CE102 limits......................................................................................................... 35
5.5.3 CE102 test procedure. .......................................................................................... 35
5.5.3.1 Purpose. ............................................................................................................. 35
5.5.3.2 Test equipment. ................................................................................................. 35
5.5.3.3 Setup. ................................................................................................................. 35
5.5.3.4 Procedures. ........................................................................................................ 35
5.5.3.5 Data presentation. .............................................................................................. 36
5.6 CE106, conducted emissions, antenna terminal, 10 kHz to 40 GHz.............................. 40
5.6.1 CE106 applicability. ............................................................................................. 40
5.6.2 CE106 limits......................................................................................................... 40
5.6.3 CE106 test procedure. .......................................................................................... 40
5.6.3.1 Purpose. ............................................................................................................. 40
5.6.3.2 Test equipment. ................................................................................................. 40
5.6.3.3 Setup. ................................................................................................................. 41
5.6.3.4 Procedures. ........................................................................................................ 41
5.6.3.4.1 Transmit mode for transmitters and amplifiers......................................................41
5.6.3.4.2 Receivers and stand-by mode for transmitters and amplifiers. .............................42
5.6.3.5 Data presentation. .............................................................................................. 43
5.6.3.5.1 Transmit mode for transmitters and amplifiers......................................................43
5.6.3.5.2 Receivers and stand-by mode for transmitters and amplifiers. .............................43
5.7 CS101, conducted susceptibility, power leads, 30 Hz to 150 kHz................................. 47
5.7.1 CS101 applicability. ............................................................................................. 47
5.7.2 CS101 limit........................................................................................................... 47
5.7.3 CS101 test procedure............................................................................................ 47
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