What is a reasonable IFBW setting for accurate measurements? I was recently characterizing a metrology grade adapter with K-connectors, as my preparation before I did ECAL User characerization so that I can convert my default ECAL unit of Female / Male configuration into Female / Female.
I calibrated the PNA E8346B, with ECAL / UNKNOWN THRU with different IFBW settings; [35KHz, 10KHz, 3KHz, 1KHz, 70Hz]. I noticed very different results on S21 measurements, and I felt that above 1KHz of IFBW, the corrected data were unacceptably noisy.
Is there any reasonable number anyone can suggest for this type of measurement (low loss, very electrically short device)?
Thanks
If you want to use a wider bandwidth, try setting stepped sweep:
From the top menu pulldown: Sweep then Sweep Setup, then check the stepped sweep box.
You can save this as a user preset, and the box will power up to that state (but new channels will still get the factory default, so use copy channels to create new channels). In stepped sweep, even up to 100 kHz (PNA-L)works reasonably well. On your PNA, I'd stay below 10kHz.