开云体育

Looking at your photo your yellow trace shows S21 linear instead of S11 Linear. I don't know what revision of firmware you have but recent firmware has a Cable Measure function built in. Have you

John. Thanks for your reply. Yes I have examined 2 meters each side of center. No issues are visible. That doesn’t mean that there is no damage. I will look at return loss and characteristic

You didn't mention this but to me what you have determined is that there is something causing an indication close to the centre of your coax, have you visually inspected where the VNA is indicating

Postscript: I note that I the pictures that I had attached show a sweep from 500Khz to 200Mhz. This was a photo setup error. When resetting the stop frequency to 125Mhz, the peak moves ever so

I have experienced a sudden and unexplained increase in the SWR of my HF antenna, I suspect the cheap coax or one of its pre-installed connectors. Before I chop the PL259s and install new ones, I

Jim is right, a vector network analyzer should not be further burdened with the functions of a spectrum analyzer. Bob - N7WY

female female?? or sma to reverse sma?? a friend grilled his 13cm amp with using a sma to reverse sma (accidently) no contact ... swr sky high .. final amp went in semiconductor heaven dg9bfc sigi Am

Stan, OK, I have found the problem... And it is ME! First of all let me thank you for for explaining how to calibrate the NanoVNA; although I am well aware of how to do a calibration, it forced me to

The tiny SA ultra.....with it's 4" screen, will also measure 2 tone IMD of a linear amplifier, like imd 3-5-7....and also harmonic suppression of a linear amplifier.

Hi David, The TinySA looks perfect for my needs - wow.

Erica, Yes, these devices are indeed remarkable! Many thanks for those who design and produce the devices and their extensive software. For a calibrated signal generator (and highly functional

NanoVNA can`t change output (only 4 steps), also output depend from frequency PS yes possible use external attenuator controlled by NanVNA over Serial, calibrate it. For this need software update

What are your START and STOP frequency settings? On which bands is the antenna supposed to work? When I sweep a multiband antenna, the nanovna shows me the SWRs of all the resonances within the range

Guys/gals, I bought my nanovna H over a year ago and for such a small price, it is an amazing bit of kit. Besides antenna tuning I use it for genera tuning of my rigs. I use it as a signal generator

No, the nanovna has its own internal signal generator, and wouldn't work with an external one. The best way to check it is to calibrate it (calibration reset, then open, short, load calibration). Then

Hello All, My NanoVNA H4 is gone completely goofy. I cannot get a good reading from it on a known good antenna. What would be the best way to test it for proper function? Can I take a reading from a

Ok so the MS5351 was already chosen but then the threshold was at 300.001M and once reduced to 290M and calibrated 50K to 1.5G the anomaly is not as bad as it was. I still see a S11 logmag bump at

My fw use si5351 generator (used on old board revisions) as default settings, last hardware have - MS5351 Need switch in: Config->Expert Settings->More->Mode to MS5351 Additional possible need change

Ok so I bought a NanoVNA-H 4 from R&L. It came with ver. 1.2.14, I installed DisLord’s Ver. 1.2.20. Now before I did this I played with the original version and everything seemed ok. Then installing

If the antenna has wires tuned for several bands, the NanoVNA will display the SWR over a specified spectrum, and whichever wire is tuned to a particular band will cause a lower SWR at that frequency.