DTIC AD0758850: Joint Experiment on the Spectrum pdf

DTIC AD0758850: Joint Experiment on the Spectrum

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Description of the Book:

The report covers the design, construction and testing of a prototype long-period seismograph system using digital telemetry. The system makes use of gain ranging amplifiers to obtain a dynamic range of 106 db. Using Geotech SL 210 seismometers, a magnification of 15,000 is obtainable in the pass band .05 – 1.0 Hz. The system noise in this band is 0.1 microvolt rms. The output is a frequency shift keyed tone (FSK) which is telemetered over VHF radio and telephone lines and recorded in direct mode on a tape recorder. A decoding system converts the serial FSK data back to parallel digital data compatible with a mini-computer

• Creator/s: Defense Technical Information Center
• Date: 3/15/1973
• Year: 1973
• Book Topics/Themes: DTIC Archive, Smith, Stewart W, WASHINGTON UNIV SEATTLE, *EARTHQUAKES, *SEISMOMETERS, BROADBAND, DATA PROCESSING, DETECTION, DIGITAL SYSTEMS, SIGNAL TO NOISE RATIO, TELEMETER SYSTEMS

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