Circuit arrangement for varying the phase of a reference signal

Details Circuit arrangement for varying the phase of a reference signal Circuit arrangement for varying the phase of a reference signal

1974-11-20

1976-06-22

Robinson, Thomas A.

Telegraphy

Systems

Line-clearing and circuit maintenance

H04L 2506

Patent

active

039652939

ABSTRACT:
For use in connection with apparatus for determining the distortion characteristic of a data transmission path, a circuit arrangement is described for varying the phase of a reference signal against which the transmitted signal is compared in the receiver. A synchronizing device operates to produce a lag or lead in the pulse output of a timing generator, as a function of lagging or leading distortion. The synchronizing device is designed to operate according to a rectangular control characteristic so that the measured error values always relate to identical phase shifts in the reference signal.

REFERENCES:
patent: 3182127 (1965-05-01), Wiese
patent: 3396240 (1968-08-01), Abbey et al.
patent: 3526713 (1970-09-01), Elvis et al.

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