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ttrftech / NanoVNA

Very Tiny Palmtop Vector Network Analyzer
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strange "peaks" in S11 after upgrading to 0.2.1 and higher #59

Closed df6dbf closed 5 years ago

df6dbf commented 5 years ago

Have here "strange" Peaks after upgrading to v0.2.1. v0.2.2 shows same behaviour. Took Screenshots with nanoVNA-saver to show the Problem. The v0.2.0 from 27. Sept. seems ok.

Screenshot from 0.2.0 (27.Sept) pre0 2 1-270919

Screenshot from 0.2.2 (29.Sept) after0 2 1-290919

EB4FBZ commented 5 years ago

I can't reproduce this issue. Just updated from 0.1.1 to 0.2.2 and the response of a filter is the same in both versions.

qrp73 commented 5 years ago

cannot reproduce, but I tested it with NanoVNASharp. May be this is nanoVNA-saver issue

gaionim commented 5 years ago

Have here "strange" Peaks after upgrading to v0.2.1. v0.2.2 shows same behaviour. Took Screenshots with nanoVNA-saver to show the Problem. The v0.2.0 from 27. Sept. seems ok.

are You using multiple segments in nanovna-saver ? I have similar Peaks, but only in nanovna-saver with multiple segments.

df6dbf commented 5 years ago

Yes, its occured only in Multi-Segment Mode.

edy555 commented 5 years ago

This issue is caused by behavior change of sweep command at 0.2.0.

This commit https://github.com/ttrftech/NanoVNA/commit/3fc17e18f900c6bb31fb1e72bab345adf576c15c shall make equivalent to former behavior. When I tested NanoVNA-saver 0.1.0 in multisegment mode with new firmware, it works well.

New release 0.2.3 is available including commit above. Could you check it out?

df6dbf commented 5 years ago

Installed the 0.2.3 and tested with actual Version of nanoVNA-saver. It seems the problem is solved. Thank you! :)