| 摘要 |
<p>PURPOSE:To easily and rapidly set a desired window value by storing plural window values specified beforehand and stopping a counting action for a prescribed time when the counting output of a counting means is coincident with either of the window values. CONSTITUTION:When a window width WW is changed and a EE adjusting device 18a is operated, a WW counter 24a comes to be a counting-up or counting-down condition, a counting output is successively changed and at every time it is coincident with the memory value of a WW table 25a, a trigger signal is outputted from the table 25a, for a prescribed time a timer circuit 22a outputs the signal of the low level, and during the low level period, a logic circuit 21a is non-activated. As the result, the pulse signal outputted from VCO 19a is not communicated with the WW counter 24a and a counting action is stopped for a prescribe time. A window level WL setting part 11b is operated in such a same manner. Thus, window values WW and WL can be easily and quickly set to the desired value.</p> |
