| 摘要 |
PURPOSE:To exactly read a digital input signal of a high speed by storing temporarily a high speed digital signal in a primary register, detecting a latch synchronizing signal by a latch synchronizing signal detector and shifting it to a secondary register, and inputting a measured value from the secondary register by a sampling signal. CONSTITUTION:A digital input signal of 8 bits and a latch synchronizing signal are synchronized and inputted to a high speed digital input unit 10 from a measuring instrument, the input signal is stored in a primary register 11, and the latch signal is inputted to a latch synchronizing signal detector 13. When the detector 13 detects the fall of the latch synchronizing signal, an output signal is outputted and a measured value is shifted to the secondary register 12 from the primary register 11. Subsequently, by a sampling signal which comes first, the measured value stored in the secondary register 12 is shifted to a channel unit 2.
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