Keysight InfiniiVision HD3 Series - Counters

Digital Voltmeter and Counters 17
Keysight InfiniiVision HD3-Series Oscilloscopes User's Guide 237
Counters
The counter analysis feature provides frequency, period, or edge event (totalize)
counter measurements on any analog channel.
The counter counts trigger level crossings within a certain amount of time (gate
time) and displays the results on a seven-segment readout (like you would see on
a standalone counter instrument).
For frequency and period counter measurements:
• The gate time is specified indirectly by the selected number of digits of
resolution, from 3 to 8. For higher resolutions, the gate time is greater.
• Up to 1 GHz (1.2 GHz typical) frequencies can be measured.
For totalize measurements:
• A running count of edges is kept. You can choose whether to count positive or
negative edges.
• Edge events with up to 1 GHz (1.2 GHz typical) frequencies can be counted.
The counter is asynchronous from the oscilloscope's acquisition system and is
always acquiring.
To use a counter:
1 From the main menu, choose Measure > Counters....
2 The Counters dialog box has tabs for the two available counters, A and B.
Select the tab for the counter you want to use.
3 Select On to enable or disable the counter.
4 From the Measure drop-down list, select what the counter measures:
• Frequency — Measures the cycles per second (Hz, kHz, or MHz) of the signal.
• Period — Measures the time periods of the signal's cycles.
• Totalize — Measures the count of edge events on the signal.
When Totalize is selected, the Event Slope drop-down list, selects whether
Rising or Falling edge events are counted.
For frequency and period measurements, select the # of Digits field, and enter
the resolution of the counter. You can choose from 3 to 8 digit resolutions.
Higher resolutions require longer gate times, which cause the measurement
times to be longer as well.