FREQUENCY MODULATED MAGNETIC TAPE RECORDING AND PLAYBACK INSTRUMENTATION SYSTEM
Abstract
The development is described of an FM system for the recording of pressures and accelerations resulting from high explosive detonations. The intelligence from a pressure gage or accelerometer gage frequency modulates a carrier frequency; after being multiplexed, this FM signal is transmitted by cable and remotely recorded on a magnetic tape recorder. In playback the output of a magnetic tape reproducer is fed through band-pass filters, which separate the various carrier frequencies of the multiplexed signal. Each filtered signal is fed to a discriminator unit which converts the FM signal into an amplitude signal. This amplitude signal is presented to a string oscillograph which produces a photographic record of the signal. The over-all instrumentation system performed satisfactorily on Operation Jangle. The most serious shortcoming is the low S/N which was obtained in the field. Improvements in design are recommended.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 24, 1953
- Accession Number
- AD0012933
Entities
People
- Joseph Petes
Organizations
- Naval Ordnance Laboratory