INSTRUMENTATION AND MEASUREMENT TECHNIQUES STUDY
Abstract
A current probe for use with printed circuitry which senses branch currents in parallel circuits and displays the angle and magnitude of the impedance across which a 159 Kc voltage is impressed is described. The present breadboard version also allows use of a Hewlett-Packard type clamp-around current probe to perform similar measurements where the conductors are wires. The location of faults on loaded spiralfour cable by means of a phase measurement technique is evaluated experimentally. Agreement with predicted results is sufficient to yield results accurate to about 10%, for faults up to 15 mi. Taking into account all apparent sources of error, it is anticipated that the technique could be implemented to provide accurate measurements within 5% out to 20 miles. Distortion product reduction techniques for single sideband for linear amplifiers are discussed, with especial emphasis on the location of the zero signal operating point as a means of achieving a minimum signal-to-distortion ratio. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 30, 1962
- Accession Number
- AD0282731
Entities
People
- A.t. Ashby
Organizations
- IIT Research Institute