Single channel protocol for telemetry setup and control

Telemetry systems consist frequently of a number of separate units. Each of these units requires certain format and functional information from the user for the performance of its operations. Three approaches to provide this information are considered. One approach requires that the operator goes to each unit and manipulates its front panel switches. In an alternative approach, the setup information is passed from a centralized console to the individual units. The present investigation is concerned with a third method involving the use of a separate bus for setup information. Recent advancements in microprocessor technology allow this bus to be implemented at a cost of a few hundred dollars per station. Each station may control several telemetry units. The considered system of a data channel and stations constitutes a single channel communications system. It is pointed out that this type of system, when properly managed, provides all the flexibility of a setup and control system.