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Chapter 1 Getting Started
Operating the Counter
Operating Guide 1-19
1
Measuring Relative Frequency
You can measure the difference in frequency from one measurement to
another (drift) using the Relative Frequency function. You do this by
pressing the Shift and Rel Freq (Offset On/Off) keys as shown in the
diagram below (this example assumes that a signal is currently applied
to Channel 1).
The Counter stores the current frequency reading when you press the
Rel Freq key. It then subtracts this value from all subsequent readings
and displays the difference until you press the Rel Freq key again.
NOTE If the input signal fluctuates, the value displayed varies as the Counter
continues to take measurements. You can vary the speed at which
measurements are taken by varying the settings for Rate and Resolution
(see “Setting the Measurement Rate” and “Setting the Resolution” on
pages 1-32 and 1-34).
Ch 1
Freq
Shift
Ch 1
Freq
Shift
Offset
Offset
On/Off
On/Off
Rel Freq
Ch 1
Rel Freq