DESIGN OF A SETUP BUS EXPANSION INTERFACE

Abstract

The Setup Bus Expansion Interface, a software selectable, 8 channel, digital demultiplexor was designed as an augmentation to the Telemetry Controller System (TMCS) at White Sands Missile Range (WSMR), New Mexico. The TMCS performs ‘front end’ synchronization and decommutation duties for the Telemetry Data Center at WSMR, utilizing EMR 700 series equipment hosted by a DEC PDP 11/44 computer/processor. The Setup Bus Expansion Interface has increased the capability of this system by transforming the single setup output bus of the host computer to a selectable 8 bus structure, allowing output of variable parameters to the 700 series equipment entirely from the host computer. The interface also offers dual selectable input on one channel to provide for the future implementation of a multiplex processor into the TMCS.