开云体育

You're using port 0 for measuring, right? What do you get when you attach the 50 ohm load to port 0? (Attach a photo) What version of firmware are you running? Can you upgrade to the latest version

Hello i have tried it on lots of other antennas, the only way i can describe it is on the smith chart to the right of the chart its just a swirling mess of lines, on the swr mode just lots of up and

Do you get a good sweep on the load (i.e. VSWR=1:1 or Smith Chart is a dot)? if you happen to have a known mismatch (two 50 ohm loads in parallel with a T is convenient) you can try that as a check,

Anything transmitting nearby? /g/nanovna-users/message/14777 Verify the Nano works on a different antenna that is physically away from the one you're having issues with. How is it

Hello Larry Yes pressing reset each time Cables are good Tested the 50 ohm load and still good Thanks David

Are you pressing the RESET menu button prior to calibrating? Have you verified the cables you use to calibrate are not defective in any way? Have you verified the 50 ohm calibration load is still

Hello, everyone, I was hoping that someone may be able to help. Been using my VNA for weeks working on tuning an Antenna then suddenly yesterday things when a bit haywire. With nothing attached the

At least if you are going to nitpick do it correctly 1 mHz (millihertz) = 0.001 Hertz and I doubt you would be able to hear it

During 50 years in engineering errors like that creep in.. Often its minor and the context makes it clear it only a typo... but once while presenting a technical subject in computer science to fellow

It perhaps should have been obvious, but I recently realized that Electrical Delay can be used with the firmware TDR to allow high time resolution even on longer cables. A wide frequency sweep

Dave VE3LHO, what you wrote is exactly what I planned to do: use the UART pins, available on PCB 3.4 of my nanoVNA-H and connect them to HC-05 BT module, in order to use my laptop to interact wireless

Sorry group; It was operator error in entering commands. Now everything is back in business. John

I think you all are making it more complicated then it needs to be. Or maybe trying to simplfy in a way that the OP doesn't intend to consider and which probably isn't really a simplification. Either

For some reason the picture was not loaded to my last message. Here is a link.... https://i.postimg.cc/jSMf9KFK/Bluetooth.png Roger

The picture below shows the internals of the NanoVNA-H PCB3.4 which has the serial pinouts which could connect to a serial Bluetooth HC05 module. Unfortunately no one has developed any firmware which

As Gert said, mHz, and, as you said, 0.001 Hz. Also, 1 mHz = 1E-3 Hz or 10^-3 or 10?? Hz, not 10E-3 Hz... But seriously, getting details like the unit names right is a signal of competence.

Shouldn't it be mHz ? Just like MHz. Case sensitivity *does* matter!!!! grin Grin Don't remember how often i made this mistake too. Gert -- Independent Expert on CE marking EMC Consultant Electrical

And inconsistently implemented. There's also a HUGE difference between "compliance testing" according to the standard and "make it work". Unfortunately the owners of the standard/trademark have never

Yep! They beat up on me as well in college. Now we at LTO try to get our STEM students to properly utilize 'scientific notation'. I was using it in the fifth grade..........but today, even high

OOOps: mhz =millihertz or 10E-3 Hertz (0.001 Hz or subsonic) Dave - W?LEV [email protected]> wrote: -- *Dave - W?LEV* *Just Let Darwin Work*