Determining cable attenuation and loss of signal threshold

Details Determining cable attenuation and loss of signal threshold Determining cable attenuation and loss of signal threshold

2005-03-08

2005-03-08

Le, N. (Department: 2858)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Parameter related to the reproduction or fidelity of a...

C324S543000

Reexamination Certificate

active

06864689

ABSTRACT:
Attenuation of a pulsed signal traversing a cable is assessed by identifying a pulse in a signal received after traversing the cable and determining first and second reference signal levels in dependence upon characteristics of the pulse. A measurement is made of the slope of the pulse between the first and second reference signal levels (such as 25% and 75% of the peak pulse magnitude), and this measurement is used to determine an indication of the cable attenuation. The cable attenuation may in turn be used to determine a threshold for indicating loss of signal during a measurement operation.

REFERENCES:
patent: 4090132 (1978-05-01), Alexander
patent: 5530367 (1996-06-01), Bottman
patent: 6466626 (2002-10-01), Cecchi et al.
patent: 6489803 (2002-12-01), Steiner et al.
patent: 0721100 (1996-07-01), None

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