Frequency Step (Frequency)
Changing the value in the Frequency Step input box changes the effect of the arrow keys when the center frequency is changed. By default, the center step is set to Automatic and the arrow keys change the center frequency by steps equal to 1/10 the Frequency Span. When Auto Frequency Step is cleared, the value can be edited to any desired frequency.
If the frequency step value is changed, then later select Automatic Frequency Step, the step size reverts to the default value, even though the value previously entered is visible. Its light appearance indicates that it is not the value actually being used.
If Auto Frequency Step is selected, the Frequency Step is unavailable and the VSA calculates the best step size for the current configuration.
