Arrangement for monitoring the performance of a digital transmis

Details Arrangement for monitoring the performance of a digital transmis Arrangement for monitoring the performance of a digital transmis

1979-06-19

1982-04-27

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

375 4, 328162, H04Q 900, H04J 314

Patent

active

043273564

ABSTRACT:
A monitor for monitoring the performance of a digital transmission system has three level sensors for sensing at decision instants the level of a signal derived from a transmitted signal. A first of the level sensors has its threshold set at a level corresponding substantially to the eye diagram amplitude, a second has its threshold set near the upper level of the eye diagram amplitude, and the third has its threshold set near the lower level of the eye diagram amplitude. The outputs from the level sensors are connected to logic circuitry which is arranged to energize an alarm whenever the upper or lower eye amplitude level is between the thresholds of the second and third level sensors.

REFERENCES:
patent: 3404232 (1968-10-01), Burford
patent: 3585507 (1971-06-01), Bickel
patent: 3721959 (1973-03-01), George
patent: 3777268 (1973-12-01), Cleobury et al.
patent: 3873775 (1975-03-01), Chown
patent: 4034340 (1977-07-01), Sant'Agostino

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