As part of the developmental planningto construct the AMSAT Phase 3DSatellite,an advanced communications OSCAR in highearth orbit, there has been discussion regard.ing provisioning of a hard limiting wideband·width digital transponder, generally with thecapability of handling traffic in the range of56·64 Kbps, or even higher speeds.In this paper we'll discuss the possibilities of using an Amateur digital video (ADV) communications system based on a coder / decoder (codec) device installed in a highspeed 80386 PC. Such a configuration could be used to digitize the motion video outputfrom a standard baseband video (NTSC) source, such as a home video camera or VCR for a digitaltransmission uplink to the Phase 3D Satellite. This PC based codec could also take an incomingdigital video motion signal from a downlink receiver and convert it to an analog video motion signalfor display on an appropriate monitor.
展开▼
