Noise assessment of PCM regenerators

Details Noise assessment of PCM regenerators Noise assessment of PCM regenerators

1979-11-13

1981-11-10

Malzahn, David H.

Excavating

17917531R, H04B 346, H04B 160

Patent

active

043002331

ABSTRACT:
Instruments are disclosed for testing the susceptibility of PCM regenerators to rear end and far end crosstalk noise. The instruments of the invention are more compatible with PCM system engineering rules since certain important PCM system parameters are synthesized in the circuitry. The instrument for measuring susceptibility to rear end crosstalk includes a filter having a voltage transfer function 1/R.sub.3 .vertline.f/.sub.fo .vertline..sup.3/4 and the instrument for measuring susceptibility to far end crosstalk includes a filter having a voltage transfer function 1/R.sub.3 .vertline.f/.sub.fo .vertline..

REFERENCES:
patent: 3678222 (1972-07-01), Boehly
patent: 3870838 (1975-03-01), Corwin et al.
patent: 3916120 (1975-10-01), Morris
patent: 4001525 (1977-01-01), Edwards
patent: 4112263 (1978-09-01), Lender
Jacobsen, "Cable Crosstalk Limits on Low Capacity Pulse Code Modulation Systems", Electrical Communication, vol. 48, No. 1 & 2, 1973, pp. 98-107.

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