...
These assumptions then allow us to set lower and upper limits as shown in the diagram below:
...
...
Recovery Time
The frequency and amplitude changes between steps in the table will cause a short transient in the DUT output due to the action of the internal filter. This is a normal response of a filter to the change in stimulus, but it will result in incorrect pk-pk amplitude measurements and so should be ignored when making measurements. Therefore a “recovery time” is used to ignore the output during the first few seconds after each change in frequency.
...