Measurements 14
Keysight InfiniiVision 3000 X-Series Oscilloscopes User's Guide 227
Counter
The InfiniiVision 3000 X-Series oscilloscopes have an integrated hardware
frequency counter which counts the number of cycles that occur within a period of
time (known as the gate time) to measure the frequency of a signal.
The gate time for the Counter measurement is automatically adjusted to be
100 ms or twice the current time window, whichever is longer, up to 1 second.
The Counter can measure frequencies up to the bandwidth of the oscilloscope.
The minimum frequency supported is 1/(2 X gate time).
The hardware counter uses the trigger comparator output. Therefore, the counted
channel's trigger level (or threshold for digital channels) must be set correctly. The
Y cursor shows the threshold level used in the measurement.
Analog and digital channels can be selected as the source.
Only one Counter measurement can be displayed at a time.
Figure 48 Isolating an event for Frequency measurement
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