Operation
Osiris receives all radar video, triggers and azimuth data from a front-panel connector. It can generate two streams of radar video onto the PCI bus. Each of the two streams can process data from a combination of the analogue and digital inputs, using one of two sets of trigger and turning data. This allows the card to process a pair of radar videos derived from a single set of azimuth turning data and triggers, or else to process two separate videos derived from two independent radars with their own trigger and turning data.

Capture of the video data into fixed-length returns is initiated by the radar's trigger (sync) signal. Data capture starts at a programmable delay from the active edge of the trigger, with video data processed in range and azimuth to combine multiple samples and returns. In range, the card samples video at up to 50 MHz, reducing the data down to a defined number of samples per return to match the bandwidth of the incoming video. In azimuth, the card can be programmed to either output every return, or else to combine returns to output a set number per scan, typically 1024, 2048 or 4096. In this mode returns are correlated, typically using a highest-wins combiner, to get the correct number of output azimuths.

Packets of video data are defined with a header and data block and are transferred to the PCI bus with DMA transfers.

Osiris is available with a board-support library for integration into custom applications, or else can be supplied with Curtiss-Wright's own Radar Video Processor (RVP) as part of a radar acquisition, processing, distribution or tracking application.