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Multimegabit Operation Multiplexer SystemThe Multimegabit Operation Multiplexer System (MOMS) is a high-data-rate PCM telemetry unit capable of sampling and encoding 60 scanning radiometer and four vidicon channels at 250 kilosamples/second and 5 megasamples/second, respectively. This sampling capacity plus the seven-bit quantization requires a total throughput rate of 40 megasamples/second and 280 megabits/second. To produce these rates efficiently, the system was divided into a pair of identical 140-megabit blocks. A low-power 20-MHz analog multiplexer and analog-to-digital converter were developed together with a video sample-and-hold that features an aperture time error of less than 50 psec. Breadboard testing of these basic building blocks confirmed the design prediction that the total system would consume 27 watts of power. Two 140-megabit output parts are suitable for quadriphase modulation.
Document ID
19740041051
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Giri, R. R.
(Harris-Intertype Corp. Radiation Div., Melbourne, Fla., United States)
Maxwell, M. S.
(NASA Goddard Space Flight Center Greenbelt, Md., United States)
Date Acquired
August 7, 2013
Publication Date
January 1, 1973
Subject Category
Communications
Meeting Information
Meeting: International Telemetering Conference
Location: Washington, DC
Start Date: October 9, 1973
End Date: October 11, 1973
Accession Number
74A23801
Distribution Limits
Public
Copyright
Other

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