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January 1, 1963Transactions of the American Institute of Electrical Engineers Part I Communication and Electronics

An accurate voice-frequency-level calibrating set for field use

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Abstract

In order to maintain the accuracy of loss measurements commensurate with the requirements of direct distance dialing (DDD), very accurate test tones are needed. This paper describes a rugged, portable calibrating set used to insure the accuracy of the test tones. A telephone craftsman may use this set to adjust the level of a signal with 0.3% accuracy. A means for analytically determining the accuracy of such a set is given in the Appendix.

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Cite This Study

W.T. Cochran (1963) studied this question.

synapsesocial.com/papers/6a6fc939e5469ee92be0a022 https://doi.org/10.1109/tce.1963.6591401

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