开云体育

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

Frequency stepping in the current firmware is done only with the SI5351 Early firmwares explicitly rounded the requested frequency to multiples of 100 making it impossible to do small steps The

Rudi, thank you very much! :-) -- Rune

Herb, thank you for the suggestion of a band stop mode! I have been aware of it, but I still need to figure out exactly how it should be done. It's on the list :-) -- Rune / 5Q5R

Thank you for the data, Bryan :-) It's a great help. -- Rune [email protected]> wrote:

The hardware differences between the commercial and the initial edy555 hardware also raises the question whether the DAC to frequency control of the vctcxo is used by the edy555 firmware for small

I built my own VNA similar to the NanoVNA, and I can tell you of my experiences of measuring small and large impedances with it. I built my VNA because it is unclear what license the NanoVNA hardware

Kurt, You are right. I rechecked my random lab F-F and get more like 0.03dB reflection loss at 900MHz. (Operator malfunction.) --John Gord

I see information from other posts that there is a quality issue with the female adapter. Take a close look at the adapter and see if there are any obvious defects. Alan

Hi Dick. The readout fluctuates around 10 dB. That is a significant movement. I would make sure the cables are making a snug connection to the female adapter. Perhaps the cable on channel 1, CH1 is