| 摘要 |
<p>A very fast autoscale feature can be implemented in a digitizing oscilloscope by using dedicated peak detector hardware 14 capable of operating at the maximum sampling rate of the A/D converter 12 to determine the minimum and maximum values of said input signal, in combination with a trigger counter 24, 26 to count the number of trigger events in the analog input signal. While in the autoscale mode, the oscilloscope microprocessor 22 can then set the appropriate scale and offset for the Y-axis of the display as a function of the maximum and minimum values determined by the peak detector 14 and set the sweep rate as a function of the count provided by the trigger counter 26. <IMAGE></p> |
