Analysis of digital radio transmissions

Details Analysis of digital radio transmissions Analysis of digital radio transmissions

1987-03-17

1989-04-25

Griffin, Robert L.

Pulse or digital communications

Repeaters

Testing

340734, 364514, 364521, 364481, H04B 1700

Patent

active

048254495

ABSTRACT:
Provided is an apparatus for analysing radio transmission to indicate the condition of a transmission link. The apparatus samples received digital radio signals to produce at each sampling instant a signal or signals representative of the modulation state at that instant. The apparatus includes display means for displaying a given number of the samples as an array of clusters in which each cluster corresponds to one of the modulation states. Associated with the display is a graticule generating means capable of storing data indicative of a plurality of graticule configurations. The apparatus has means which enables the production on the display of a graticule configuration which is appropriate to the cluster array associated with the modulation scheme of the transmission under analysis. In addition there is an adjustment which can be operated to set the relative position of the array and the graticule.

REFERENCES:
patent: 4381546 (1983-04-01), Armstrong
patent: 4606051 (1986-08-01), Crabtree et al.
patent: 4627071 (1986-12-01), Head et al.
patent: 4639934 (1987-01-01), Zuranski et al.

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