Abstract: A detector includes a board with a connector, a measurement resistor, a switch, and circuitry. The board with the connector is coupled to an external board. The measurement resistor is connected to the connector. The switch is connected to the measurement resistor and switches on and off an electric current flowing thorough the measurement resistor. The circuitry measures a potential difference between both ends of the measurement resistor, and determines, based on the potential difference measured, a coupling state of the external board with respect to the connector. The circuitry controls the switch to switch on and off the electric current flowing through the measurement resistor.

Abstract: A disclosed control device includes a first unit configured to generate image data of multiple images to be superposed one on the other to form a single image and transmit the image data. The second control unit transmits to the first control unit a horizontal sync reference signal for achieving synchronization of the images in a horizontal direction. Based on the horizontal sync reference signal, the first control unit transmits to the second control unit a transfer clock signal that indicates transmission timing of the image data and an effective area signal that indicates an effective area of the image data. The first control unit asserts the effective area signal for an effective-area-signal assertion period that occurs between two consecutive reference-signal assertion periods during which the horizontal sync reference signal is asserted.

Abstract: A disclosed control device includes a first unit configured to generate image data of multiple images to be superposed one on the other to form a single image and transmit the image data. The second control unit transmits to the first control unit a horizontal sync reference signal for achieving synchronization of the images in a horizontal direction. Based on the horizontal sync reference signal, the first control unit transmits to the second control unit a transfer clock signal that indicates transmission timing of the image data and an effective area signal that indicates an effective area of the image data. The first control unit asserts the effective area signal for an effective-area-signal assertion period that occurs between two consecutive reference-signal assertion periods during which the horizontal sync reference signal is asserted.

Abstract: A measurement method for compensation for short-circuit compensation or load compensation or a measurement method for verification uses a device for measuring impedance by probing an impedance standard substrate using contact probes, and comprises a step whereby contact sites for probing the impedance standard substrate are input and an alarm is displayed when the number of contacts with the contact sites exceeds a predetermined limit.