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Al's picture

I have though about calibration, but as you can change the frequency range in subsequent scans it could cause confusion for some users.

On the plot toolbar you can display the delta from the first sweep which may be of some use:
- Perform a single sweep with the input terminated.
- Change the 'Start' button to 'Continue' by clicking on the down arrow and perform your scan.
- Click the delta icon on the toolbar under the plot, this displays the delta between the initial and all subsequent sweeps.