Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Phase comparison
Patent
1982-09-24
1985-08-06
Karlsen, Ernest F.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Phase comparison
324 77B, 324 77R, G01R 2316
Patent
active
045338680
ABSTRACT:
In order to determine the overall phase and amplitude distortion undergone by signals sent over a transmission channel, a pulse sequence generated at one end of the transmission channel is received at its other end at a first and a second input of a measuring instrument including, downstream of a receiving stage connected to the second input, regenerating circuitry for producing replicas of the original pulses. The latter are fed, along with the received distorted pulses, to a phase and amplitude comparator working into a spectral analyzer which displays the spectral-density difference between a received pulse and a replica of the corresponding transmitted pulse. The second input of the instrument may be connected to the output side or to the input side of an equalizer which supplies the received pulses to the first input thereof and whose parameters are to be adjusted on the basis of the measurements made.
REFERENCES:
patent: 3184606 (1965-05-01), Ovenden et al.
patent: 3500193 (1970-03-01), Kemanis
patent: 3747106 (1973-07-01), Dalabakis et al.
patent: 3986053 (1976-10-01), Doemer
patent: 4021653 (1977-05-01), Sharp et al.
patent: 4128808 (1978-12-01), Westra
Fabbri Bruno
Fausone Alfredo
Baker S.
Dubno Herbert
Karlsen Ernest F.
Ross Karl F.
SIP - Societa Italiana per L'Esercizio Telefonico p.A.
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