Cart (Loading....) | Create Account
Close category search window

A PDM-to-digital encoder and translator

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Cates, J. D. ; U.S. Army Department, White Sands Proving Grounds, Las Cruces, N. Mex. ; Baird, J. K.

Development of the PDM-to-digital encoder and associated translator resulted from a requirement to preserve the accuracy of pulse-duration modulation (PDM) telemetered data. Deterioration of accuracy in the data reduction or ¿playback¿ of such data is avoided by digitizing the data directly at the output of the receiver and recording the digitized data in serial form on a standard PDM channel of a magnetic tape recorder such as an Ampex model 309 using Ampex model 303 pulse amplifiers. The pulse duration is measured at the half-amplitude level of the PDM pulses for the digitizing process to minimize the effects of variations in amplitude and rise and fall times. Once the PDM data are digitized, no error is introduced by the PDM circuitry or wow-and-flutter characteristics of the tape recorder. Range timing is recorded on a standard channel adjacent to the PDM channel. A translator is required at the data-reduction facility to convert the digital data recorded on a conventional PDM tape recorder channel into a format suitable for computer or buffer equipment use. The translator, with associated time code reader to read the tape recorded range timing, supplies a time tag with a time resolution of 1 millisecond for each digitized data sample.

Published in:

American Institute of Electrical Engineers, Part I: Communication and Electronics, Transactions of the  (Volume:82 ,  Issue: 2 )

Date of Publication:

May 1963

Need Help?

IEEE Advancing Technology for Humanity About IEEE Xplore | Contact | Help | Terms of Use | Nondiscrimination Policy | Site Map | Privacy & Opting Out of Cookies

A not-for-profit organization, IEEE is the world's largest professional association for the advancement of technology.
© Copyright 2014 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.