AN EXPERIMENTAL CURRENT-PROBE SYSTEM FOR MEASURING CONDUCTED RADIO-FREQUENCY INTERFERENCE FROM 20 KC TO 80 MC.
Abstract
New and improved techniques and circuits based on newly developed instrumentation have been devised for adequately performing conducted radio-frequency-interference (RFI) acceptance and compatibility tests on electrical equipment. Tests made to military specifications which have been used in the past as guides for this type of testing have been found to be inadequate for determining the compatibility of tested equipment with electromagnetically sensitive equipment connected to the same power circuit or interconnected in a common system. The new development, based on the current probe technique and involving measurements of noisesource impedances, load impedances, and noise currents, now enables one to specify completely in terms of the fundamental units of power the conducted RFI characteristics of the device under test. An impedance and phase meter was designed which covers the frequency range of 20 kc to 80 Mc and an impedance range of 10 to 10,000 ohms at 0 to 360 degrees. Functional utilization of the new techniques will require that applicable performance requirements be incorporated into appropriate military specifications. More explicit acceptability limits may now be specified. Recommended revisions are defined. An evaluation of the hardware developed is presented as well as examples of RFI measurements. Complete circuit diagrams are provided. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1965
- Accession Number
- AD0622556
Entities
People
- J. L. Brooks
Organizations
- Naval Facilities Engineering Service Center