Apparatus for recording and playing back radar video with conventional video recorder
AssigneeGeneral Signal Corporation
InventorsCarl E. Schwab, Peter Foley, Charles A. Caputo
Life of this patent
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Abstract
Apparatus for recording and play back of radar video employs a conventional TV video recorder. A multiplexer accepts radar timing signals, synchro data definitive of azimuth, a 60 Hz. reference as well as radar video and formats the signals for recording. A demultiplexer accepts video signals formatted as above, from the conventional video recorder and reformats the signals to drive a conventional PPI display. The video recorder is unmodified so conventional TV video can also be recorded or played back, interspersed, if desired, with the radar video.
Claims9
Apparatus to adapt signals from a radar system for recording on a TV video recorder and to adapt played back signals from said TV video recorder to drive a PPI display, said apparatus including a multiplexer providing to said TV video recorder a signal stream including a radar timing signal, a pulse stream containing azimuth information, a radar video signal, and a head synchronizing pulse stream of pulse rate independent of said radar timing signal and a demultiplexer for adapting said played back signal, comprising a replica of said signal stream, for driving said PPI display, said demultiplexer comprising:
- video processor means responsive to said played back signal for outputting only said radar video signal to said PPI display,
- disable generator means responsive to said head synchronizing pulse stream for providing a control pulse stream of rate equal to said head synchronizing pulse rate but of width larger than said head synchronizing pulse,
- means for demodulating said pulse stream containing azimuth information,
- coupling means responsive to said means for demodulating for coupling azimuth information to said PPI display,
- and inhibiting means for inhibiting operation of said coupling means during the duration of any of said control pulses.
Dependencies are inferred from the claim text.