On Fri, Oct 29, 2021 at 07:50 AM, Peter Hall, VK6HP wrote:
I've recently been building some crystal notch filters in the region of 11
MHz. To characterize the filters I use quite a narrow frequency span,
typically 10 kHz or so. The exact centre frequency may be something like
11.055 MHz and, as far as I can tell, nanoVNA Saver exports correct Touchstone
files which can be plotted quite well in other applications. However, when I
look at the plots generated within nanoVNA Saver itself I see that the labels
on the frequency axis are displayed to only 2 decimal places (e.g. 11.05 MHz),
causing several major divisions to have the same label. I see there have been
relatively recent reports of issues to do with excessive rounding on the data
(not frequency) axis but I'm more inclined to think that I'm simply missing
something in the plot set-up. Any comments welcome.
Peter,
I suggest you try the NanoVNA App by OneOfEleven. It has much better scaling for the frequency and Y axis and will do the 10 kHz. span that you want. You can also plot multiple traces on one graph. It is so good I rarely use NanoVNA saver anymore.
Hint: You have to hover over the graph you want to change and then right click for all the options for that graph.
The compressed file in rar format is called NanoVNA-App.rar and available at the link below. Just put it in the directory you want to use and then uncompress using 7Zip or another file decompression program and execute the app.
Roger
Roger
Roger Need