| 摘要 |
PURPOSE:To enable quick viewing of the achieving rate to the target counts at a glance, by analog display of counts using the set target counts set with a setter as fullscale in a counter/display for displaying the frequency changing. CONSTITUTION:The output of a counting circuit 12 is selected with a selection circuit 13 with the changeover of a switch 4 to be shown on a digital display section 1. The target counts are set for a counting value 12 with a setter 14 and checked with the digital display section 1 to be memorized into a memory circuit 15. Then, a counting pulse is selected by a switch 5 with the cycle matching own chanting speed, a start stop switch 6 is closed to start the counting and a chanting is started. Thus, a pulse selected with a selection circuit 11 passes through a gate circuit 20 to be fed to a counting circuit 12 and a variable frequency divider 17 and counted with a counting circuit 18 to be shown with an analog display section 3. In this manner, the achieving rate of the target counts to the full scale can be viewed quickly at a glance. |
