Pulse or digital communications – Repeaters – Testing
Patent
1987-03-17
1990-04-17
Griffin, Robert L.
Pulse or digital communications
Repeaters
Testing
364514, 364521, 364481, H04B 1700
Patent
active
049187082
ABSTRACT:
Provided is an apparatus for analysing digital radio transmissions which can provide an output indicating the condition of a digital transmission link. The apparatus operates by sampling received radio signals to produce for each sampling instant a signal or signals representative of the modulation state of the transmission at the sampling instant. The apparatus includes a processor which can receive and measure a given number of such signals. The processing means is arranged to process the signals according to one or more stored routines and generate one or more parameters which indicate the condition of the transmission. The apparatus includes means for representing the samples by digitally encoded numbers and the processing means arranges those samples into one of a plurality of groups according to the value of the number. The number of groups correspond to the number of modulation states. This technique allows the apparatus to carry out accurate analysis of the transmission.
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McKissock Murdo J.
Pottinger John R.
Fromm Jeffery B.
Griffin Robert L.
Hewlett--Packard Company
Huseman Marianne
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