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Re: Quick compare with HP 8753C...
Excellent! I had been looking for a concise description of those correction calcs.
By Jerry Gaffke · #1262 ·
Re: Place to buy
This seller was pretty quick and packaging was done with great care. Mine was packed in anti-static bag layed over a foam deposited in a aluminiun tin can wrapped in bubble then in envloppe....(the
By Stephane Bois · #1261 ·
Re: Quick compare with HP 8753C...
Yes that makes sense. I am sure you will have no problem either finding a library for Matlab, or just implementing the calcs in Matlab. The 10/12 point cal will need some sneaky workarounds - as the
By Roger Henderson · #1260 ·
Re: Your NanoVNA version
Given that it works at all, my guess is that it will work just fine for you. There is some question as to whether or not some of the clones do as well at extremely high frequencies, but most of us
By Jerry Gaffke · #1259 ·
Re: Your NanoVNA version
No one has been able to define any performance differences. Only cosmetics. I too have. ¡°Bad¡± one and it¡¯s performance is fantastic and consistence with my much higher priced instruments. Ignore
By Warren Allgyer · #1258 ·
Re: Further Comments on Resistive Bridges
Having spent a career in digital design, analyzing this thing is exercising a bunch of stuff that was explained in classes I slept through some 45 years ago. So you RF guys should get out your red
By Jerry Gaffke · #1257 ·
Re: Your NanoVNA version
Hi, new to this group, I recently purchased a NANO VNA from eBay. Unfortunately it was before this series on the bad clones....I got a bad one. They showed pictures of the good ones and sent me a
By GARY GILES · #1256 ·
Re: NanoVNAsharp
This is less of a matter of liking, but more a matter of some 40 years of experiencing the ¡°illusion of vendor support¡± (RFC 873, September 1982). Yes. Yes. Apple. I can¡¯t prove anything here
By Carsten Bormann · #1255 ·
Re: NanoVNAsharp
I've observed that it is very common for custom C# applications to trigger a false positive on a virus scan. That doesn't help provide a definitive answer I'm afraid, but FWIW I have zero concerns
By Roger Henderson · #1254 ·
Re: NanoVNAsharp
If you're paranoid, back up your machine regularly. Actually, you should do that if you aren't paranoid. And if you think somebody else should have released the fruits of their efforts as open source,
By Jerry Gaffke · #1253 ·
Further Comments on Resistive Bridges
As discussed in prior posts the NanoVNA uses a resistive bridge. They are wide band and easier to construct then the alternative bridge utilizing a directional coupler. There are excellent references
By alan victor · #1252 ·
Re: NanoVNAsharp
https://www.av-comparatives.org/ has a great list of articles on tests they've performed on the most popular AV s/w. It's a nice site for research - they publish their test methods as well. For 2018,
By Larry Rothman · #1251 ·
Re: NanoVNAsharp
FWIW both a fresh download of NanoVNAsharp and one from July come up clean with BitDefender, which doesn't seem to be included in virustotal scans. Quite a few antivirus companies share technology ag
By Mike Brown · #1250 ·
Re: NanoVNAsharp
Carsten, From your statement, it sounds like you only like OS s/w. Did you compile the compiler you use to create s/w exe's? If you do, what did you use - another compiler? Who compiled that one? How
By Larry Rothman · #1249 ·
Re: NanoVNAsharp
Which doesn¡¯t protect us from him catching something that then is compiled into all executables he makes. Yes, that has happened to others. Being trusted always creates a liability. (And the closed
By Carsten Bormann · #1248 ·
Re: NanoVNAsharp
Larry, This is a good test site. It¡¯s known that some specific AV programs have false positives for miscellaneous programs that other AV test approaches do not. It¡¯s why, for instance, Wes Hayward
By K4FMH · #1247 ·
Re: NanoVNAsharp
I don't know what you're using for AV but virustotal gets 0 hits: https://www.virustotal.com/gui/file/4ff059fe0e543309bad2bb9c9447e4166a60264b794ad695397555a4b61f2a05/detection The nanoVNA Wiki has
By Larry Rothman · #1246 ·
NanoVNAsharp
I wanted to download the PC software, nanovnasharp from Hugen's Google drive. Tried it on 2 pcs, and both using different security programs flagged it as a potential ransomware program. Can anyone
By Bob Kozlarek <njscan@...> · #1245 ·
Re: Quick compare with HP 8753C...
Roger, I had a thought... I think I might try your same technique of external calibration for my original test (per the first post in this message thread). In other words, using both the NanoVNA and
By Jeff Anderson · #1244 ·
Re: New to group and thoughts on Return Loss and Loss
I am on holiday so did follow the various threads recently.?A bridge or Directional coupler is the heart of any VNA. Strictly speaking if you are serious, the bridge or coupler ought to be
By F4WCV · #1243 ·