G - Physics – 01 – R
Patent
G - Physics
01
R
324/44, 324/58.0
G01R 31/04 (2006.01) G01R 27/26 (2006.01) G01R 31/02 (2006.01) H04M 3/28 (2006.01)
Patent
CA 1183209
TELEPHONE CABLE SPLICERS TEST SET AND METHOD OF TESTING ABSTRACT OF THE DISCLOSURE Method and apparatus for testing pairs of conductors of a telephone cable, including method and apparatus for mea- suring the capacitance of a circuit component such as a pair of conductors. The capacitance of each of twenty-five pairs of conductors of a cable is measured and the capacitance value is stored, the median value of capacitance is identified and stored, each measured capacitance value is compared with the median value, and an out-of-limits indication is made when a measured capacitance value deviates from the median value by more than a predetermined limit. Capacitance is measured by connecting the circuit component, such as a pair of conductors, in the timing circuit of a monostable multivibrator, charging and dis- charging the timing circuit to vary the elapsed time of the on output of the multivibrator. The multivibrator controls the output of an oscillator and the oscillator output pulses are counted, with the count total varying as a function of the ca- pacitance of the conductor pair. The instrument may be cali- brated to read out directly in capacitance if desired.
406343
Communications Technology Corporation
Macrae & Co.
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