Radar recorder & playback system

Claim 1

In a recording system for recording and the subsequent reproduction of signals received in a radar receiver the combination comprising: a. a video channel deriving video signals from said radar receiver; b. a trigger pulse channel deriving trigger pulses synchronized with the video signals from said receiver; c. inverter mixer circuit means coupled to said video channel and to said trigger pulse channel for inverting the trigger signals and mixing the video signals and said inverted trigger signals; d. a bearing signal channel deriving bearing signals and reference signals from said receiver representative of the instantaneous position of the radar antenna with respect to a reference; e. a synchro analog-to-digital converter means in circuit with said bearing signal channel for converting the three stator voltages to a serial digital format; f. a helical scanning video tape recorder coupled to said inverter mixer and to said synchro analog-to-digital converter for recording said video and trigger signals on a first track and recording said bearing signals in a serial digital format on a second track; g. and reproducing means coupled to said recording means for converting the recorded signals to radar video, trigger, reference and bearing signals.