Re: NanoVNA #calibration
Radu Bogdan Dicher
Larry - I re-executed the calibration over 10.4 through 11MHz, saved totoggle quoted messageShow quoted text
"1," and I always recall it before measuring. However, the letter changes
every time I start the scan (from "C1" to "c1") - I press sweep, flop!, it
changes. Not sure why, as far as I can tell I have the same settings on
device and computer application (center: 10.7MHz, span: 600kHz), and I
RECALL 1 it every time I prepare for scanning.
David - yes, I am using 56.2ohm and 301ohms, 1% tolerance resistors. It's
the closest I could come up with by calculating for minimum loss. The
filters are 150kHz Muratas (JAs), but I also measured about four different
bandwidths, and from multiple sources. I have at least 7 or 8 different
batches and they all have the 5dB difference L/R. I think my calibration is
not getting applied, based upon Larry's feedback above.
Still trying to figure out how to maintain calibration settings while
executing the scan.
Thank you both,
On Sun, May 24, 2020 at 6:19 AM <firstname.lastname@example.org> wrote:
What I see in the plot that you posted is a filter that is about 170 kHz