开云体育

This open source project was originated in Japan, enhanced in China, and is only popular due to the Chinese industrial base. Many of the contributors to this group are not native speakers of English.

Don't try to press OPEN/SHORT/LOAD/ISOLN/THRU menu for second time, for some unknown reason it leads to the wrong calibration. So, if you failed at some step, just return to CAL menu, press RESET and

There is no needs to download calibration procedure from somewhere. Just use CAL menu: 1) Open CAL menu and press RESET 2) Open CALIBRATE menu 3) Connect O item to CH0 wait 2-3 seconds and press OPEN

Thanks! However, re read the message. That was not the equation stated.

Does someone tried to measure parameters for cal-kit supplied with nanoVNA?

Where did you download the calibration procedure from? The downloaded manual I have reads like aChinese Fortune Cookie. It makes no sense and gives me a headache to try to figure it out.

The problem here is that we don't know parameters of cal-kit which is supplied with nanoVNA... So, just adding ability to setup cal-kit parameters won't help. Because we're needs to know what

you're needs to perform RESET before calibration. If you don't do that, you will get strange results.

if your antenna has VSWR other than 1:1 at resonant frequency, it means that you have poor impedance match with your antenna. Before measure Q factor, you're needs to improve impedance match between

Yes, but NanoVNA-saver doesn’t give one a *stand-alone, self contained unit* like an Agilent FieldFox. Personally I don’t want to have to use an external computer with the NanoVNA. I obtained a

In short, if you have VSWR not equal to 1.00 at resonant frequency, it means that you have poor impedance match between signal source and antenna.

minimum VSWR at antenna resonance is always 1:1. Because you should match your feeding line with antenna impedance at resonant frequency. If you write your antenna impedance as R+jX, and your feeding

Yes, makes sense. The condition for this Q equation is unique. Requires a perfectly matched antenna. This would be analogous to the case of an R-L-C network perfectly matched to its measurement

You can find it school book at physics section about LC circuit. That is basic thing in the radio: Q = Fc / BW If you use fractional bandwidth BWF ( fractional bandwidth = bandwidth / Fc ) it turns

Hi David I think you should read my response to this question. You negative conclusion is not valid. Pragmatic solution are still useable and in addition using the NanoVNA-saver you got it all to

Alan, thank you very much for mentioning the HP app note! I've taken a look at its figure 8-13 as well as another S11 plot of a resonant circuit, and I now believe that the earlier-mentioned SWR

wrote: Kurt is right. Moving the reference plane in software is going to be better than doing the trick I suggested. I don’t know why I didn’t think of this - I regularly use port extensions to

Yes, Kurt is right, you can compensate this in software by moving the reference plane. It is far from ideal - it would be better if the data on the calibration standards could be properly entered. --

Ken Boswoth reported error in calibrating on a cable with a male SMA on it. Here’s a way to improve on that, despite the fact that the firmware doesn’t allow one to do it properly. Here are few

Hi Ken Shure you can calibrate at the end of cable. You have noted when CH0 left open you see an open after a full calibration with Short nothing as open and laod. It has been compensated internally