RIGOL Chapter 6 Operations and Measurements
6-36 MSO4000/DS4000 User’s Guide
To Turn the Frequency Counter On/Off
The hardware frequency counter supplied with this oscilloscope can make more
precise measurement of the input signal frequency.
Press Measure Counter and turn the multi-function knob to select the
desired channel as the measurement source of the frequency counter. You can also
press Counter continuously to switch the current measurement source. CH1 to CH4,
EXT and D0-D15 can be selected as the measurement source. When “OFF” is
selected, the frequency counter measurement function is turned off.
The measurement result is displayed at the upper right side of the screen. The color
of the icon corresponds to that of the current measurement source. The following
figure is the result of frequency measurement of CH1.
Note: When the frequency of the input signal of the measurement source is lower
than 15 Hz, the measurement result displayed is “< 15 Hz”.
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