开云体育

google defective? https://www.ebay.com/itm/RF-SWR-Reflection-Bridge-0-1-3000-MHZ-Antenna-Analyzer-UHF-VHF-VSWR-Return-Loss/254192958023?epid=18034389620&hash=item3b2f14ba47:g:n0IAAOSwCrtcqxmS

Hello Norbert, Thank you very much! :-) The "span" value is the -3 dB bandwidth - assuming the -3 dB points get placed correctly. The setup currently analyses as follows: 1) From the marker 1

If I can say a little something about this Idea. A tracking generator would not cost a lot more in ressources and would be a nice addon in a NanoSa. And the possibility to add an amplifier to the TG

Yes, it would be very useful. But could one go further and combine the SA & VNA into one unit? For what it is worth, Keysight sell a range of portable FieldFox instruments. They are either * Spectrum

Years ago, an otherwise knowledgeable ham and I had a public argument about the phase shift and delay through a 75m mobile antenna loading coil. Those conclusions are still posted on his web page -

Warren, Where can I purchase the 1-3000 MHz RF bridges? Thanks, Mike N2MS

Been looking at this lab card, and I wonder what is it useful for? I must not get it.. Is it a way to test our NanoVNA?

Rudi, You could also omit the "-d 0483:df11" parameter from the dfu-util command line. Ralph

While described as 101 fixed steps, fewer are evidently used by nanoVNA firmware for small spans. Given Si5351 setting granularity for artifact-free switching, what are rule-of-thumb minimum frequency

Hi Rune, first impression is outstanding! If you take a look at the BP-Filter I can't find the value of the width for the bandpass in respect to the -3dB points. Same for the -6dB BW. LP&HP analysis

Thanks for playing with this idea, Erik. There was a comment from a Japanese NanoVNA user on Twitter comparing the use of the Nano to an oscilloscope that is in the same price range but has poor

For those who live in the UK seeking a screened NanoVNA, I have just received a black NanoVNA from eBay seller: maybeshewill (2849, 99.6% Positive Feedback). Cost ?43.50 It would appear to be

If calibrated for amplitude at spot frequencies using nanoVNA, then could some SDR (e.g. SDRplay has Android API) be useful for spectrum analyses?

What amplitude (dB) and phase (degrees) resolution are credible for nanoVNA? I read e.g. 0.1dB and 1 degree for other VNAs for amateurs..

Would it be wonderful if there would be, next to the nanoVNA, a nanoSA or nano Spectrum Analyzer? Well I decided to test what the most simple SA could look like, just good enough to test the harmonics

I agree. This is a mess and hard to follow. It should have been a forum from the beginning. Suggest that since this project and others like it will continue into the future, that a forum should be

Hi First test with the lab card. I'm a little worried about the contacts on the lab card

Many VNA receiver ports do NOT precisely match 50 Ohms; inserting a precision attenuator before CH1 improves matching. nanoVNA bridge and ICs are nominally designed for 50 Ohms; I don't find a nanoVNA

Did you mean that user will be able to enter offset delay for open, short and load and specify C0 for the open? I can try to add it at least for C0. Regarding to the delay offset, I'm not sure on how

Hi Dave Re hashtags: You can use whichever you prefer, i.e. email client program or web interface. A post can have more than one hashtag. Subscribers can mute a a certain hashtag if they prefer, e.g.