Accession Number : ADD017570

Title :   Instantaneous Bit-Error-Rate Meter.

Descriptive Note : Patent, Filed 25 Jun 92, patented 20 Jun 95,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Slack, Robert A

Report Date : 20 Jun 1995

Pagination or Media Count : 5

Abstract : An instantaneous bit error rate meter provides an instantaneous, real time reading of bit error rate for digi tal communications data. Bit error pulses are input into the meter and are first filtered in a buffer stage to provide input impedance matching and desensitization to pulse variations in amplitude, rise time and pulse width. The bit error pulses are transformed into trigger signals for a timing pulse generator. The timing pulse generator generates timing pulses for each transformed bit error pulse, and is calibrated to generate timing pulses having a preselected pulse width corresponding to the baud rate of the communications data. An integrator generates a voltage from the timing pulses that is representative of the bit error rate as a function of the data transmission rate. The integrated voltage is then displayed on a meter to indicate the bit error rate.

Descriptors :   *MEASUREMENT, *DATA TRANSMISSION SYSTEMS, *ERRORS, *DIGITAL COMMUNICATIONS, *PATENTS, INPUT, INTEGRATED SYSTEMS, REAL TIME, PULSE GENERATORS, DATA RATE, BUFFER STORAGE, READING, IMPEDANCE MATCHING, TRIGGER CIRCUITS, TIMING DEVICES

Subject Categories : Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE