Accession Number : ADA289580

Title :   High Speed Data Acquisition System: Burst-Type Phenomena With Wait Periods in Between.

Descriptive Note : Master's thesis,

Corporate Author : NORTHEASTERN UNIV BOSTON MA ELECTRONICS RESEARCH LAB

Personal Author(s) : Wong, Peter C.

PDF Url : ADA289580

Report Date : 03 DEC 1993

Pagination or Media Count : 73

Abstract : In some aerospace applications data periodically occurs in short bursts. High frequency content data can be digitized and prepared for transmission at a much lower bit rate during the intervals between bursts. The analog burst signal is digitized by a high-speed analog-to-digital converter to produce binary words which are stored in a FIFO memory along with synchronization words which mark the beginning of every new frame. The stored words are then converted into a serial bit stream during the wait periods and put into a PCM format for transmission to the ground. In this thesis, the system is tested with a data collection period of 16.0 usec and a wait period of 5.136 msec. A commercial converter is used to sample at 20 MHz and produce 10-bit words which are read out at a 62.5 kilo word per second rate. Experimentally, it was found that the system developed provided accuracy with 1.2% error for signal with fast rise and fall times, signals with slow rise and fall times, e(-t)/T wave-functions, and pseudo-random signals.

Descriptors :   *DATA ACQUISITION, *ANALOG TO DIGITAL CONVERTERS, SIGNAL PROCESSING, HIGH FREQUENCY, DATA TRANSMISSION SYSTEMS, ACCURACY, AEROSPACE SYSTEMS, SYNCHRONIZATION(ELECTRONICS), WORDS(LANGUAGE), DATA RATE, READ OUT TECHNIQUES, BUFFER STORAGE, ANALOG SIGNALS, PRINTED CIRCUIT BOARDS, PSEUDO RANDOM SYSTEMS, BINARY PROCESSORS.

Subject Categories : Computer Hardware
      Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE