DDR,
You should not have big dropouts like that. This would indicate either hardware failure, bad correction data, or possibly bad sweep settings resulting in bad measurements.
To rule out the sweep settings issue, please test individual failing points with the VSG in CW mode, and the SA124B set to a 200 kHz span centered at the output frequency. You can email support at signalhound dot com and we can try to figure out if we can fix it with correction data or if we will need to repair one of the units.
Uploaded Failed |  |