Digital data transmission tests on voice channels

Digital data transmission tests on voice channels

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A variable level test tone at 1750 Hz was chosen because it was a tone central to the power spectra of all the data of both modems. ... Knowing this required input level and the standard output of the modems (0 dBm), an impedance- matchinganbsp;...


Title:Digital data transmission tests on voice channels
Author: Urban Sciences, Inc, Law Enforcement Standards Laboratory, National Institute of Law Enforcement and Criminal Justice
Publisher: - 1977
ISBN-13:

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