Persistent Link:
http://hdl.handle.net/10150/606659
Title:
Transmitter Signal Coupling: DC Versus AC
Author:
Viggiano, A. A.
Affiliation:
Lockheed Missiles and Space Company
Issue Date:
1969-09
Rights:
Copyright © International Foundation for Telemetering
Collection Information:
Proceedings from the International Telemetering Conference are made available by the International Foundation for Telemetering and the University of Arizona Libraries. Visit http://www.telemetry.org/index.php/contact-us if you have questions about items in this collection.
Publisher:
International Foundation for Telemetering
Journal:
International Telemetering Conference Proceedings
Abstract:
Radiofrequency telemetry systems using digitized data and FM transmitters in missile development tests result in serious loss of data at the receiving stations when the receivers have narrow bandwidth. This problem is related to the capacitive coupling network between data input and the transmitter exciter. The relative merits of capacitive coupling versus DC coupling are discussed in this paper on the basis of Fourier analysis of a series of pulses. It may be observed that the digitized data in the systems studied always manifest a DC component due to uneven distribution of binary digits 1 and 0. This DC component is eliminated by a capacitor coupling, but is preserved with a DC coupling. This paper assesses the effects of the elimination of the DC component on the relative position of the spectrum to the carrier. The discussion draws on the results of a test situation of an actual telemetry system. In this test, two identical telemetry transmitters were used; the only variable was the type of coupling exciter employed. A DC coupling is recommended for the transmission of binary information on an FM telemetry transmitter as a result of this test and analysis. Conditions for the proper use of such a coupling are stated.
Sponsors:
International Foundation for Telemetering
ISSN:
0884-5123; 0074-9079
Additional Links:
http://www.telemetry.org/

Full metadata record

DC FieldValue Language
dc.language.isoen_USen
dc.titleTransmitter Signal Coupling: DC Versus ACen_US
dc.contributor.authorViggiano, A. A.en
dc.contributor.departmentLockheed Missiles and Space Companyen
dc.date.issued1969-09en
dc.rightsCopyright © International Foundation for Telemeteringen
dc.description.collectioninformationProceedings from the International Telemetering Conference are made available by the International Foundation for Telemetering and the University of Arizona Libraries. Visit http://www.telemetry.org/index.php/contact-us if you have questions about items in this collection.en
dc.publisherInternational Foundation for Telemeteringen
dc.description.abstractRadiofrequency telemetry systems using digitized data and FM transmitters in missile development tests result in serious loss of data at the receiving stations when the receivers have narrow bandwidth. This problem is related to the capacitive coupling network between data input and the transmitter exciter. The relative merits of capacitive coupling versus DC coupling are discussed in this paper on the basis of Fourier analysis of a series of pulses. It may be observed that the digitized data in the systems studied always manifest a DC component due to uneven distribution of binary digits 1 and 0. This DC component is eliminated by a capacitor coupling, but is preserved with a DC coupling. This paper assesses the effects of the elimination of the DC component on the relative position of the spectrum to the carrier. The discussion draws on the results of a test situation of an actual telemetry system. In this test, two identical telemetry transmitters were used; the only variable was the type of coupling exciter employed. A DC coupling is recommended for the transmission of binary information on an FM telemetry transmitter as a result of this test and analysis. Conditions for the proper use of such a coupling are stated.en
dc.description.sponsorshipInternational Foundation for Telemeteringen
dc.identifier.issn0884-5123en
dc.identifier.issn0074-9079en
dc.identifier.urihttp://hdl.handle.net/10150/606659en
dc.identifier.journalInternational Telemetering Conference Proceedingsen
dc.typetexten
dc.typeProceedingsen
dc.relation.urlhttp://www.telemetry.org/en
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