1 Getting Started
46 Keysight 53150A/151A/152A Operating Guide
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.
Ch 1
Freq
Shift
Ch 1
Freq
Shift
Rel Freq
Ch 1
Rel Freq
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 59 and 61).
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