Method of and system for measuring electrical characteristics of

Details Method of and system for measuring electrical characteristics of Method of and system for measuring electrical characteristics of

1981-02-17

1982-07-20

Robinson, Thomas A.

Multiplex communications

Wide area network

Packet switching

370 17, H04J 308, H04B 346

Patent

active

043407889

ABSTRACT:
To measure electrical characteristics of a line segment, a switch or some other circuit element of a time-sharing telecommunication network using pulse-amplitude modulation, a transmission path is established between two subscriber lines through the circuit element to be tested, these subscriber lines being respectively connected to a generator of a sinusoidal test signal and to a highly sensitive signal detector. The two subscriber lines are briefly closed during a single sampling interval, or during two consecutive sampling intervals separated by an intervening guard interval during which capacitively stored residual energy is dissipated, depending on the nature of the test.

REFERENCES:
patent: 3624304 (1971-11-01), Formenti et al.
patent: 3986106 (1976-10-01), Shuck et al.
patent: 4021625 (1977-05-01), Bradley
patent: 4207433 (1980-06-01), Bartholomay et al.

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