Re: Bandpass filter measurement anomalies - problem identified

Steven Dick
 

I updated the file to rev2: "Bandpass filter measurement anomalies R2.pdf" in the K1RF folder in the files section showing improvement of LC bandpass filter responses on the left edge using the PHSNA Type II with and without the ERA-3+ output amplifier. I included circuit mods to eliminate the ERA-3+.  Don't do the change if your PHSNA application is working fine for you.  The mod if useful if you need to do accurate measurement on relatively wideband LC bandpass filters on the left side of the filter response if you see unexplained "jaggedies".

Regards,
"Digital Steve", K1RF


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