Pulse Counting

Counting of TTL-compatible pulses input through the Digital 1 In 1 and Digital 2 In 2 inputs is enabled by setting the Channel Data Type to either Counter 1, Counter 2, Freq.1 or Freq.2, shown in Figure 1. Counter 1/2 Data Types display results in counts/pixel while Freq.1/2 Data Types display results in counts/second (Hz). I.e. each pixel represents a frequency. This result is a function of Scan Rate and number of Samples/Line.

Figure 1: Pulse Counter Enabled

Set Offline Plane Fit to None. If Offline Plane Fit is not set to None, the frequency data will be offset. Realtime Plane Fit applies only to image view mode, not data, but typically should be set to Line to enable visibility of data over all ranges.

The counter range is 0 to 32767 counts/pixel.

The sensitivity of pulse counter is user-adjustable but should generally be left unchanged at 1.0.

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