Accession Number : AD0696299

Title :   AN INSTRUMENT FOR RECORDING MEASUREMENT RESULTS ON MAGNETIC TAPE,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Lvov,B. A.

Report Date : 05 SEP 1969

Pagination or Media Count : 13

Abstract : The author describes a tape recorder for converting analog signals into digital form, recording them on tape, and using the recorded data as a direct input to a computer for cross-checking purposes. The recorder has two input channels so that two separate processes can be monitored simultaneously. The input voltage in each channel is amplified and converted into a five-bit binary code which corresponds to the 32 discrete levels of the input voltage. The A/D conversion uses a ramp generator, a level comparator and a 150 KHz gated pulse generator. The pulse train, containing a number of pulses corresponding to the sampled amplitude of the input signal (sampling rate of up to 200 per second), is encoded into five-bit words by means of a ring counter. The output is used to modulate the 7.2 KHz carrier driving the magnetic heads. In addition to the signal information, synchronizing pulses are included between each word. The system is described in detail, including a block diagram, waveforms, and performance information.

Descriptors :   (*MAGNETIC RECORDING SYSTEMS, *DIGITAL RECORDING SYSTEMS), ANALOG-TO-DIGITAL CONVERTERS, MAGNETIC TAPE, SAMPLING, USSR

Subject Categories : Recording and Playback Devices

Distribution Statement : APPROVED FOR PUBLIC RELEASE