Location
Cocoa Beach, FL
Start Date
7-3-1966 8:00 AM
Description
This paper describes design of a programmable decomrnutator for multi-format PCM telemetry data. The decommutator organization includes a program counter, instruction decoding registers, and an arithmetic unit, together with pattern comparison logic, and synchronization decision networks.
The various types of input formats are discussed and their implications on the organization are determined. The input data formats include (a) normal PCM commutation with frame synchronization and subcommutation synchronization, (b) mixes of different rate PCM commutation, (c) word synchronization and (d) data address tags with each data word.
The decommutator is organized around a coincident current memory which serves for both program storage and data buffering. A system of program interrupts is also provided so that (a) data words can be requested from the buffer by an asynchronous device, and (b) new programs can be loaded into unused sections of memory. The second feature permits immediate changes of input format by initiating only one manual command. The address and control fields of the program instructions are defined to allow all of the synchronization parameters (i.e. error tolerance) to be contained as part of the program.
Application of General Purpose Computer Techniques to the Design of a Programmable PCM Telemetry Decommutator
Cocoa Beach, FL
This paper describes design of a programmable decomrnutator for multi-format PCM telemetry data. The decommutator organization includes a program counter, instruction decoding registers, and an arithmetic unit, together with pattern comparison logic, and synchronization decision networks.
The various types of input formats are discussed and their implications on the organization are determined. The input data formats include (a) normal PCM commutation with frame synchronization and subcommutation synchronization, (b) mixes of different rate PCM commutation, (c) word synchronization and (d) data address tags with each data word.
The decommutator is organized around a coincident current memory which serves for both program storage and data buffering. A system of program interrupts is also provided so that (a) data words can be requested from the buffer by an asynchronous device, and (b) new programs can be loaded into unused sections of memory. The second feature permits immediate changes of input format by initiating only one manual command. The address and control fields of the program instructions are defined to allow all of the synchronization parameters (i.e. error tolerance) to be contained as part of the program.
