Title:
【発明の名称】伝送線のインピーダンスの精密測定の方法
Document Type and Number:
Japanese Patent JP3060119
Kind Code:
B2
Abstract:
A method for measuring the impedance of a transmission line. The length and D.C. loop resistance of the line are measured. A pulse is transmitted along the line, the pulse having a duration greater than the time required for it to propogate from its source to the end of the transmission line and reflect back to the source. The transmitted and reflected pulses are monitored and the resultant readings converted to a gross impedance measurement. The measurement is then corrected for the "dribble up" effect. The magnitude of the correction is a function of D.C. loop resistance of the line. The corrected measurement is an accurate measurement of line impedance.
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Inventors:
Roland W Gabish
Application Number:
JP1940891A
Publication Date:
July 10, 2000
Filing Date:
January 18, 1991
Export Citation:
Assignee:
Beckman Industrial Corporation
International Classes:
G01R27/04; G01R27/16; (IPC1-7): G01R27/04
Attorney, Agent or Firm:
Masaki Akashi