NDLI: Early performance of the 12-ghz, 200-watt transmitter experiment package in the communications technology satellite

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Early performance of the 12-ghz, 200-watt transmitter experiment package in the communications technology satellite

Content Provider	NASA Technical Reports Server (NTRS)
Copyright Year	1977
Description	Measured performance characteristics of the transmitter experiment package (TEP) aboard the Communications Technology Satellite for the first 90 operating days in orbit are presented. The TEP consists of a nominal 200-watt output stage tube (OST), a supporting power processing system (PPS), and a variable-conductance heat pipe system (VCHPS). The OST, a traveling-wave tube augmented with a 10-stage depressed collector, has an overall saturated average efficiency of 51.5 percent and an average saturated radiofrequency (RF) output power at center-band frequency of 240 watts. The PPS operated with a measured efficiency of 86.5 percent to 88.5 percent. The VCHPS, using three pipes to conduct heat from the PPS and the body of the OST to a 52-centimeter by 124-centimeter (20.5-in. by 48.75-in.) radiator fin, maintained by the PPS baseplate temperature below 50 C for all operating conditions. The TEP performance characteristics presented include frequency response, RF output power, efficiency, and distortions. Communications characteristics were evaluated by using both video and audio modulated signals.
File Size	12813779
Page Count	67
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19770026314
Archival Resource Key	ark:/13960/t22c3t75c
Language	English
Publisher Date	1977-10-01
Access Restriction	Open
Subject Keyword	Space Communications, Spacecraft Communications, Command And Tracking Communications Technology Satellite Transmitters Traveling Wave Tubes Instrument Packages Performance Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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