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MIL-STD-461E Test

 

REQUIREMENTS FOR THE CONTROL OF
ELECTROMAGNETIC INTERFERENCE
CHARACTERISTICS OF SUBSYSTEMS AND
EQUIPMENT

 

 

MIL-STD-461E

is approved for use by all United States Departments

and

Agencies of the Department of Defense

 

Standard (.pdf) Description
MIL-STD-461E Requirements for the Control of Electromagnetic Interference Characteristics of Subsystems and Equipment.
MIL-STD-462D Measurement of Radio Frequency Spectrum Characteristics, Superseded by MIL-STD-461E
MIL-STD-464 Electromagnetic Environmental Effects Requirements for Systems.
MIL-STD-469 Radar Engineering Interface Requirements, Electromagnetic Compatibility Metric
MIL-STD-1542B Electromagnetic Compatibility and Grounding Requirements for Space System Facilities
 
MIL-STD-461E - Emission and Susceptibility Requirements

Requirement

Type of Test Description Frequency Range

CE101

Conducted Emissions Power Leads 30Hz - 10kHz

CE102

Conducted Emissions Power Leads 10kHz - 10MHz

CE106

Conducted Emissions Antenna Terminal 10kHz - 40GHz

CS101

Conducted Susceptibility Power Leads 30Hz - 150kHz

CS103

Conducted Susceptibility Antenna Port Intermodulation, 15kHz - 10GHz

CS104

Conducted Susceptibility Antenna Port Signal Rejection, 30Hz - 20GHz

CS105

Conducted Susceptibility Antenna Port Cross-modulation, 30Hz - 20GHz

CS109

Conducted Susceptibility Structure Current 60Hz - 100kHz

CS114

Conducted Susceptibility Bulk Cable Injection 10kHz - 400MHz

CS115

Conducted Susceptibility Ground - Bulk Cable Injection Impulse Excitation

CS116

Conducted Susceptibility Power & I/O Damped Sinusoid Transients, 10kHz - 100MHz

RE101

Radiated Emissions Magnetic Field 30Hz - 100kHz

RE102

Radiated Emissions Electric Field 10kHz - 18GHz

RE103

Radiated Emissions Antenna Spurious & Harmonic Outputs 10kHz - 40GHz

RS101

Radiated Susceptibility Magnetic Field 30Hz - 100kHz

RS103

Radiated Susceptibility Electric Field 10kHz - 40GHz

RS105

Radiated Susceptibility Transient Electromagnetic Field Pulsed EMI - EMP

 

Requirement Matrix

Equipment CE101 CE102 CE106 CS101 CS103 CS104 CS105 CS109 CS114 CS115 CS116 RE101 RE102 RE103 RS101 RS103 RS105
Surface Ships

A

A

L

A

S

S

S

 

A

 

A

A

A

L

A

A

L

Submarines

A

A

L

A

S

S

S

L

A

 

A

A

A

L

A

A

L

Aircraft, Army

A

A

L

A

S

S

S

 

A

A

L

A

A

L

A

A

L

Aircraft, Navy

L

A

L

A

S

S

S

 

A

A

A

L

A

L

L

A

L

Aircraft, Air Force  

A

L

A

S

S

S

 

A

A

A

 

A

L

 

A

 
Space Systems  

A

L

A

S

S

S

 

A

A

A

 

A

L

 

A

 
Ground, Army  

A

L

A

S

S

S

 

A

L

L

 

A

L

L

A

 
Ground, Navy  

A

L

A

S

S

S

 

A

 

A

 

A

L

L

A

L

Ground, Air Force  

A

L

A

S

S

S

 

A

L

A

 

A

L

 

A

 
A = Applicable L = Limited applicability S = Specified in procurement Blank = Not Applicable

 

Test Equipment Required

(In most cases a MIL-STD-461E Semi-anechoic Chamber is required)

 

CE101 Test Equipment CE102 Test Equipment CE106 Test Equipment

a. Measurement Receivers
b. Current probes
c. Signal Generator
d. Data recording device
e. Oscilloscope
f.  Resistor (R)
g. LISNs

a. Measurement Receiver
b. Data recording device
c. Signal Generator
d. Attenuator, 20 dB, 50 ohm
e. Oscilloscope
f.  LISNs

a. Measurement Receiver
b. Attenuators, 50 ohm
c. Rejection Networks

d. Directional Couplers
e. Dummy Loads, 50 ohm
f.  Signal Generators. For amplifier testing, a signal generator is required to drive the
amplifier that provides the modulation used in the intended application and that has
spurious and harmonic outputs that are down at least 6 dB greater than the applicable
limit.
g. Data recording device

 

CS101 Test Equipment CS103 Test Equipment CS104 Test Equipment

a. Signal Generator
b. Power Amplifier
c. Oscilloscope
d. Coupling Transformer
e. Capacitor, 10 µF
f.  Isolation Transformer
g. Resistor, 0.5 ohm
h. LISNs

a. Measurement Receiver

b. Signal Generators (up to 3 ea)

c. Three Port Network (up to 3 ea)

d. Attenuators

e. Filters

See Appendix 50.8

a. Measurement Receiver

b. Signal Generators (up to 2 ea)

c. Three Port Network (up to 2 ea)

d. Attenuators

e. Filters

See Appendix 50.9

 

CS105 Test Equipment CS109 Test Equipment CS114 Test Equipment

a. Measurement Receiver

b. Signal Generators (up to 2 ea)

c. Three Port Network (up to 2 ea)

d. Attenuators

e. Filters

See Appendix 50.10

 

a. Signal Generator
b. Amplifier (if required)
c. Isolation Transformers
d. Current Probe
e. Measurement Receiver
f.  Resistor, 0.5 ohm
g. Coupling Transformer

a. Measurement Receivers
b. Current injection probes (maximum insertion loss shown in Figure CS114-2, minimum
insertion loss is recommended, not required)
c. Current Probes
d. Calibration fixture: coaxial transmission line with 50 ohm characteristic impedance,
coaxial connections on both ends, and space for an injection probe around the center
conductor.
e. Directional Couplers
f.  Signal Generator
g. Plotter
h. Attenuators, 50 ohm
i.  Coaxial loads, 50 ohm
j.  Power Amplifiers

CS115 Test Equipment CS116 Test Equipment  

a. Pulse Generator, 50 ohm, charged line (coaxial)
b. Current Injection Probe
c. Drive cable, 50 ohm, 2 meters, 0.5 dB or less insertion loss at 500 MHz
d. Current Probe
e. Calibration fixture: coaxial transmission line with 50 ohm characteristic impedance,
coaxial connections on both ends, and space for an injection probe around the center
conductor.
f.  Oscilloscope, 50 ohm input impedance
g. Attenuators, 50 ohm
h. Coaxial loads, 50 ohm
i.  LISNs

a. Damped sinusoid transient generator, 100 ohm output impedance
b. Current injection probe
c. Oscilloscope, 50 ohm input impedance
d. Calibration fixture: Coaxial transmission line with 50 ohm characteristic impedance,
coaxial connections on both ends, and space for an injection probe around the center
conductor
e. Current probes
f.  Waveform recording device
g. Attenuators, 50 ohm
h. Measurement Receivers
i.  Power Amplifiers
j.  Coaxial loads, 50 ohm
k. Signal Generators
l.  Directional couplers

m. LISNs

 

 

RE101 Test Equipment RE102 Test Equipment RE103 Test Equipment

a. Measurement Receivers
b. Data recording device
c. Loop sensor having the following specifications:
(1) Diameter: 13.3 cm
(2) Number of turns: 36
(3) Wire: 7-41 Litz wire (7 strand, No. 41 AWG)
(4) Shielding: Electrostatic
(5) Correction factor: See manufacturer’s data for factors to convert measurement
receiver readings to decibels above one picotesla (dBpT).
d. LISNs
e. Ohmmeter
f.  Signal Generator

a. Measurement Receivers
b. Data recording device
c. Antennas
(1) 10 kHz to 30 MHz, 104 cm rod with impedance matching network
(a) When the impedance matching network includes a preamplifier (active rod),
observe the overload precautions in 4.3.7.3.
(b) Use a square counterpoise measuring at least 60 cm on a side.
(2) 30 MHz to 200 MHz, Biconical, 137 cm tip to tip
(3) 200 MHz to 1 GHz, Double ridge horn, 69.0 by 94.5 cm opening
(4) 1 GHz to 18 GHz, Double ridge horn, 24.2 by 13.6 cm opening
d. Signal Generator

e. Stub Radiator
f.  Capacitor, 10 pF
g. LISNs

a. Measurement Receiver
b. Attenuators, 50 ohm
c. Antennas
d. Rejection Networks
e. Signal Generators
f.  Power Monitor

 

RS101 Test Equipment RS103 Test Equipment RS105 Test Equipment

a. Signal source
b. Radiating loop having the following specifications:
(1) Diameter: 12 cm
(2) Number of turns: 20
(3) Wire: No. 12 insulated copper
(4) Magnetic flux density: 9.5x107 pT/ampere of applied current at a distance of
5 cm from the plane of the loop.
c. Loop sensor having the following specifications:
(1) Diameter: 4 cm
(2) Number of turns: 51
(3) Wire: 7-41 Litz wire (7 Strand, No. 41 AWG)
(4) Shielding: Electrostatic
(5) Correction Factor: See manufacturer’s data for factors to convert measurement
receiver readings to decibels above one picotesla (dBpT).
d. Measurement Receiver or narrowband voltmeter
e. Current Probe
f.  LISNs

a. Signal Generators
b. RF Power Amplifiers Microwave Power Amplifiers
c. Receive Antennas
(1) 1 GHz to 10 GHz, double ridge horns
(2) 10 GHz to 40 GHz, other antennas as approved by the procuring activity
d. Transmit Antennas
e. Electric field sensors (physically small - electrically short)
f.  Measurement Receiver
g. Power Meter
h. Directional Coupler

i.  Attenuator
j.  Data recording device
k. LISNs

a. Transverse Electromagnetic (TEM) cell, parallel plate transmission line or equivalent
b. Transient pulse generator, mono-pulse output, plus and minus polarity
c. Storage oscilloscope, 500 MHz, single-shot bandwidth (minimum), variable sampling
rate up to 1gigasample per second (Gsa/s)
d. Terminal protection devices
e. High-voltage probe, 1 GHz bandwidth (minimum)
f.  B-dot sensor probe
g. D-dot sensor probe
h. LISNs
i.  Integrator, time constant ten times the overall pulse width

 

     

 
   

 

 

 Last Updated: June 11, 2014

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An Electro Mechanical Research and Development (EMRAD) Corporation, Company

 
     
 

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