开云体育

Hmmm...looks like a Nano-Cantenna ;-) On Sat, 25 Jan 2020 at 3:34 PM, hwalker<herbwalker2476@...> wrote: Ever wonder why some 50 ohm loads are reasonably priced, look great at dc, but quickly

Hello All, Could someone advise if these SMA terminators are good ? I've done a resistance check at DC using multimeter and it's shown 68 Ohms (too high by me, should be lower). Secondly, I've

I forgot to mention That I used 10 Segments in NanoVNA-Saver Jos Op 25-1-2020 om 21:37 schreef Jos Stevens:

Hi Oristo and Herb, Thinks for the pictures Oristo, i think they are from the 2.8" NanoVNA-H, my 2.8 -H version works well, this problem is? with my VNA new version H4. Herb,? yes I did use the

Ever wonder why some 50 ohm loads are reasonably priced, look great at dc, but quickly veer off 50 ohms at higher frequencies? Take a look at the attached photo, courtesy of one of the Russian NanoVNA

Another suggestion to reduce novice frustration is to advise them to download the ST files using a PC that has their email client installed, in order to pass ST’s identity verification scheme.

Thanks for the link; that is a useful resource. - Ed

On Sat, Jan 25, 2020 at 09:19 AM, Jos Stevens wrote: " I'm testing my new NanoVna-H4 iusing NanoVNA-Saver and have a problem doing the 2 port calibration"

Here are polar plots for CH1 connected to CH0 corrected vs uncorrected

Here are screen captures from my "worse clone" for uncorrected vs corrected

I'm testing my new NanoVna-H4 iusing NanoVNA-Saver and have? a problem doing the 2 port calibration . When I have done the last item of the calibration procedure (through) I see a nice sinewave-like

I just reconfirmed it working using a different (Safari) browser not logged into YouTube

No, but I do not have semi rigid coax.. First measurement using 35cm RG316 shows loss from 250-400MHz. Second measurement using longer LMR-400 shows loss from 41.67-66.67MHz, approximately matching

Interesting, the link goes to a channel that says there are no videos! Roy WA0YMH

Hello Norbert, I think it has to do with calibration. After calibration direct at the nanoVNA CH0 SMA female plug, a 1 m coax cable connected to the reference plane with open at its other end, should

There exist a very good kindle e.book about the Nano Vna :

On Sat, Jan 25, 2020 at 04:54 AM, <sidebores@...> wrote: Can someone tell me please do you have to calibrate everytime you change the start and stop frequency limits. Or is the cal good if its

linked in /g/nanovna-users/wiki/Application-Notes#Collected-wisdom

A source of useful VNA application information at - https://www.nonstopsystems.com/radio/frank_radio_coax-sw.htm

Hello Kev, Interpolation is used, however the routine is not so robust that it would precisely apply without some error introduced. Hence, if I recall you will see a cal* symbol display. If you desire