I normally test <3GHz on these E5071C's, but now I need to go up to 6GHz. I tried calibrating with the following settings:
IF = 10kHz
POWER = 10 dBm
RANGE = 3550 to 3700
and 5000 to 6000
This gives me the "Power Unstable" message, sometimes, during calibration. After this I tried power of 7 dBm, 5 dBm, and 0dBm. I have calibrated an E5071C multiple times now with an ECAL unit and with a manual CalKit and no matter what I do I get these weird intermittent blips in my measurements that are stuck on -200. I can't find any mention in the documentation or anywhere else online about this.
Has anyone else experienced this? Any solutions?
e5071c network analyzer vna isolation vswr ecal test calibration calkit
It turned out the ECAL unit needed to be replaced, it was nearly time for it to go back to Keysight for calibration.
Swapping the ECAL unit out with a new one, did the trick.