Abstract: A directivity display device and method are disclosed which involve a first saw-tooth generator producing a scan signal and a brilliance modulation circuit producing a brilliance modulated signal derived from the characteristic output of a test object with respect to a rotational angle of the test object. Thereby, the directivity display device makes it possible to display in graphic form a property of the test on a cathode-ray tube with a polar or other coordinate representation.

Abstract: A multi-channel video display apparatus comprises a channel selector circuit including a plurality of manually operated switches, a sequential circuit to generate an output in response to the operating sequence of the switches in step with a vertical synchronization pulse, and a video signal gate circuit for passing a video signal in response to the output from the sequential circuit to the electrode of a cathode ray tube. The output from the sequential circuit is used to generate a series of horizontal and vertical beam positioning DC potentials for biasing the sawtooth waveforms to provide simultaneous display of the video signals on the screen of the cathode ray tube.

Abstract: The smearing of moving images due to photoconductive and capacitive lags inherent to the photoelectric conversion target of a television camera can be removed by reducing the scan area of the target so that the electron beam traverses the target at a lower speed than the speed at which the corresponding portion of the image is traversed by the beam when the entire area of the target is scanned.