MA28139 MA28139 OBDH Bus Terminal Replaces June 1999 version, DS3592-5.
0 DS3592-6.
0 January 2000 The OBT ASIC will interface any user to the ESA On Board Data Handling bus.
Developed under ESA Contract, it conforms to ESA OBDH, Digital Bus Interface and Internal User Bus Standards.
The OBT has 2 separate functions.
The first is a 5 channel modem which, on the bus side, provides the digital waveforms necessary to operate the Litton Bus drivers, and receives the outputs of the Litton bus detectors.
On the user side, it provides an input / output at Digital Bus Interface level.
The second function, internally coupled to the first, provides a multiplexing / demultiplexing function of the DBI s...

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