Accession Number:

AD0857519

Title:

EMC Data Collection Techniques: Test methods CE and CS.

Descriptive Note:

Interim rept. no. 2, 2 Nov 68-2 May 69,

Corporate Author:

MOORE SCHOOL OF ELECTRICAL ENGINEERING PHILADELPHIA PA

Personal Author(s):

• Haber, Fred
• Dolls, K. H.
• Showers, R. M.
• Doviak, R. J.
• Yablik, C. S.

Report Date:

1969-06-01

Pagination or Media Count:

148.0

Abstract:

An evaluation of the present specifications for conducted interference in MIL-STD-461A and 462 is reported. The basis for setting limits is reviewed, and the test methods presently called for are applied to several types of communications and radar equipment. Statistical data on power line and equipment internal impedances permit a comparison of present emission and susceptibility limits and permit the computation of new limits by inserting data into a theoretical interference model. A radiation model is used to arrive at an absolute limit of current from an interference source. This limit is converted to a measured emission current limit through use of a statistical circuit model, assuming an allowable 2.3 probability of interference. A corresponding susceptibility limit is derived. From the standpoint of efficiency in predicting compatibility, the optimum value of emission test load impedance is the average actual load impedance, and not a short circuit as is presently used. Limits derived for both test terminations, and accuracies of the two techniques are compared. Certain new emission and susceptibility limits are proposed and specific recommendations are presented on test methods. Author

Descriptors:

• (*ELECTROMAGNETIC COMPATIBILITY
• STANDARDS)
• INTERFERENCE
• SPECIFICATIONS
• ELECTRICAL CONDUCTIVITY
• MATHEMATICAL MODELS
• ELECTRICAL IMPEDANCE
• TEST METHODS

Subject Categories:

• Active and Passive Radar Detection and Equipment
• Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE