Magnetic and Electric Field Probes for Transient Measurements.
Abstract:
The effectiveness of recently developed magnetic and electric field probes is evaluated. Three probes were evaluated a high-frequency, wide-band variable mu magnetometer, with a small sensor head for measuring inside enclosures, covering a 10-Hz to 10-MHz frequency range a sensitive 3-Mhz to 30-MHz magnetic field probe and a high impedance 400-Hz to 50-MHz electric field probe. These devices were developed to produce improved and more versatile instrumentation for the investigation and evaluation of electromagnetic interference problems. The probes in common use today do not have a constant response over their frequency ranges and require many adjustments and calibrations to make them useful. The probes evaluated use active circuitry to produce a constant response over their operating ranges and, therefore, require little calibration. These probes will be used for measuring and recording broad-band transients and for making narrow-band automated interference measurements. Author