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I'm not sure where that measurement is being displayed, I am getting a graph for quality factor that shows a parabola, concave up, with two bumps at the bottom that reflect at 0, both facing down...

There is some asymmetry in some barrel connectors causing problems if the male pins are also a bit different. If I reverse the barrel connector there is no connection with the LOAD, the other way

What have you calibrated it against? You need a known good reference to see if there's any loss. I know that both Kurt and David have good references to compare against, and they are seeing clear

I am following group for a while and it indeed is overwhelming with messages. I can reccomend using subgroups. i do that in several other groups.io groups and that is real game changer. I believe it

I think this is not adapter is bad. The cable that come with NanoVNA is very bad :) Just tested with NanoVNA, my adaptor works ok up to 792 MHz with S21=0.00 dB. At 900 MHz it has S21=0.21 dB. I'm not

I am fresh owner of NanoVNA device. Connection got my windows 19 laptop went flawleslly and NanoVNA Saver reads it with no problem. But, connection to Windows8 desktop did not go well. Windows

According to your S1P file, your antenna has the following parameters: Resonant frequency: 13.35 MHz. Bandwidth: 850 kHz Q factor: 15.7

si5351 allows to use frequency steps smaller than 1 Hz, but NanoVNA has limitation, it store frequency as integer value, so it cannot work with frequency step smaller than 1 Hz. Also some old NanoVNA

This is the trace I got measuring Q using the nanosaver software in s11, not sure how to interpret the data... as far as loaded vs. unloaded Q goes, the device sends ASK data though the coil, so Q

You can measure Q factor in the NanoVNASharp MOD v2: https://www.rtl-sdr.com/forum/viewtopic.php?f=4&t=4881#p12354 Just open Series RLC screen and move mouse around graph, you will see Q factor for

Hi Nick - Getting VNAR4.3 connected to nanoVNA is tricky even on Windows Thpse settings do not affect communication to nanoVNA. Has anyone used VNAR4.3 with nanoVNA on Windows XP?

Sounds great. Give it a try. You first, please. I see condescending salesman with 9+ signature lines. That would seem sensible too. ( Unfortunately, I can not BLOCK him again. Cuz I'm using browser

The S11 and S21 method you mentioned will give you the loaded Q. For the unloaded Q it is more tricky especially if the Q is very high. For the latter I use a loose coupling method that can measure Q

Have you tried another cable? Quite possibly a hardware problem. -- Dr. David Kirkby, Kirkby Microwave Ltd, drkirkby@... https://www.kirkbymicrowave.co.uk/ Telephone 01621-680100./

That’s interesting. You can see the design, which is completely open source hardware and Impressive The VNA is most stable when there is a warm-up period of about 15 minutes

It is e.g. for me Documented limits would IMO be even nicer, helping prospects consider whether nanoVNA minimum frequency steps are appropriate for them.

I downloaded v1.1 of the Calibration Procedure and all is well until I get to Note 21. When I connect the two ports together, my Blue Line is at the very top of the chart and the readout fluctuates

Based on e.g. IBM's experience with PC Jr, I am not optimistic. Many tech fans seemingly want to avoid being perceived as naive. It can also lead to misinformation epidemics, but anyone could start a

38 : Update - The [LeastVNA] @Gary O'Neil - 6 October 2019 : /g/nanovna-users/message/4194 35 : Straight In The Heart of The Matter - 6 October 2019