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METHOD AND APPARATUS FOR MEASURING DELAY DISTORTION INCLUDING SIMULTANEOUSLY APPLIED MODULATED SIGNALS

  • US 3,629,696 A
  • Filed: 08/06/1968
  • Issued: 12/21/1971
  • Est. Priority Date: 08/06/1968
  • Status: Expired due to Term
First Claim
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1. A method for Measuring the delay distortion of a signal transmission circuit between spaced input and output points therein comprising the steps of modulating a plurality of different frequency carrier signals with the same modulating signal at the same frequency to produce modulated carrier signals having modulation envelopes of coincident phase, applying said modulated signals simultaneously to said input point for transmission over said circuit, receiving the modulated carrier signals at said output point, and determining any difference in phase between the modulation envelopes of said received signals.

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