Method and device for measuring phase jitter on a transmission c

Details Method and device for measuring phase jitter on a transmission c Method and device for measuring phase jitter on a transmission c

1985-06-19

1987-03-31

Griffin, Robert L.

Pulse or digital communications

Repeaters

Testing

324 83R, 371 22, 379 6, H04B 1700

Patent

active

046548610

ABSTRACT:
A sinusoidal test signal of a given frequency is applied by the generator 12 to the transmission channel 10. The output signal from the channel is sampled at 16 and fed to a Hilbert transformer 20 through an ADC 18. The sampled outputs from the Hilbert transformer are fed to a device 26 which derives therefrom the phase of the received signal. The phase of the test signal generated at 30-34 is subtracted from that of the output signal from device 26 and the resultant signal is fed to a phase filter 36, which removes therefrom the phase intercept and frequency shift components. The output from filter 36 is fed to a predictive filter 40 which removes the residual noise therefrom. A detector 42 measures the variations of the phase jitter values provided by predictive filter 40.

REFERENCES:
patent: 3546588 (1970-12-01), Campbell, Jr.
patent: 3711773 (1973-01-01), Hekimian et al.
patent: 3737766 (1973-06-01), Lubarsky, Jr.
Elektronik Und Maschinenbau, vol. 95, No. 2, 1978, Reutlingen; F. Coenning, "Megerate fur die Datenubertragungstechnik", pp. 82-88.

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