Development of an Ultrawideband Magnetic-Tape Recorder, Phase II.
Abstract
An ultrawideband transient recorder is being developed at the Harry Diamond Laboratories with recording specifications beyond the state of the art. The progress made during phase I is described in HDL-TR-1573. This report presents the accomplishments of phase II and concludes the efforts of this program. The phase II laboratory recording system again includes a Newell-type tape transport that now accelerates tape at a rate of 8000 in./sq sec to a maximum speed of about 3000 in./sec. The recording heads developed for this system have either an all-ferrite core or a ferrite core with Alfesil pole tips. The flux is produced by a driven gap spacer placed between the pole faces. Signal frequencies from 100 kHz to 20 MHz, with bias frequencies of 100 MHz and above, have been recorded longitudinally for 5 to 8 sec. However, recordings with SNR of about 15 dB were possible for periods of only tens of milliseconds. The upper frequency of zero-bias-recorded signals was 36 MHz at a tape speed of 2800 in./sec. The recordings were reproduced on Mincom wideband recorders/reproducers at 60 and 120 in./sec.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1975
- Accession Number
- ADA017950
Entities
People
- Allison S. Hill
- John W. Utecht
- Karl H. Krey
Organizations
- Harry Diamond Laboratories