Citation
Abstract
One of the most likely configurations for the computational complement of the tracking stations of the future is a number of small computers, each performing a dedicated function, interfaced with some specific subset of the tracking station equipment; each computer would be interfaced with the other computers. A previous article in this report series presented a general discussion of the intercomputer communications requirements for such a system and a system-level description of equipment for providing this intercomputer communications capability. This article describes in some detail the line-interface or driver/receiver (D/R) unit for intercomputer communications. This unit is capable of receiving and transmitting digital information a distance of up to 600 m via coaxial cable. The trilevel signaling format used to code the information is discussed as well as the various handshakes that are involved between computer and D/R unit and the transmitting D/R unit and the receiving D/R unit. Status information is supplied to the associated computer via the status register, and a bit-by-bit description of this status register is given.
Details
- Volume
- XV
- Published
- June 15, 1973
- Pages
- 109–115
- File Size
- 794.2 KB