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The settings I used which also now seems to show correct trace is frequency 70Mhz to 147 Mhz and format real? Cheers 73s Kev MM0KJG

Hello Dave, Here is 2 pictures for you to view.

I went directly to attached to the USB.

Hi Dave - Sorry. I should have said "worse clone reported about -72 Ohms reactive and 1 Ohm resistive" See attached image for repeat of Herb's steps with slightly different results, but still no "j".

That should be -j72 ohms. Proper and good use of a VNA involves respecting the sign of the complex portion of the impedance measurement. -j implies capacitive and the below the central horizontal line

IR doesn't work too well in sunlight. How about a neutrino beam from the LHC? Dave - W?LEV

I test older version wifi only instrument. Extreme useful. Wifi works on long distance. Easy measure antenne feedpoint without long coax cable. No any interfetence up to 70cm. I think wifi/bluetooth

Did you read the original message #8655? Let's try to do it step by step. ))) Switch on NanoVNA and connect a piece of open ended cable to CH0. No matter what is the length and Vf. In my example,

On Sun, Jan 26, 2020 at 10:37 AM, Bob Albert wrote: Halfway around the Smith chart isn't 1/8 wave; it's 1/4 wave. ======================================================= Bob, Read message #10234 in

I don't know what the firmware does to calculate the battery level but I suspect that setting vbat_offset to 150 (as suggested by Hugen) is because the difference in voltage drop between the Schottky

Suppose I measure with a millivoltmeter the voltage across D2. Is it correct then to set the vbat_offset parameter to the value just read ? TNX Alberto

So, the solution is an IR link? Let's get designing folks! On Sun, 26 Jan 2020 at 12:16 PM, David Eckhardt<davearea51a@...> wrote: With an RF instrument such as a VNA that measures down into the

Halfway around the Smith chart isn't 1/8 wave; it's 1/4 wave.

Using 1-900MHz device calibration from weeks ago, I followed Herb's steps /g/nanovna-users/message/10210 for three generic CATV jumpers with F-connector barrels via RCA to BNC to SMA

Hi Jos, just one question, not related to the topic: why open 4 Topics with the same name? Why don't you continue the conversation in the first one by clicking Reply? This breaks the thread. It seems

Dear Oristo, thank you so much. I have tried it and it works perfectly!! Bob Albert thanks also for your advice too. It is really an amazing project and I am so happy to see such a strong &

Could you please give us a picture of your filter response as you measure it? Is your BC band filter a passband, stop band, low pass, or high-pass filter? Typical use would be a stop band or high-pass

Hi all, Could some give a rough guide in how to measure a filter. I have broadcast band filter and when I measure it the signal looks upside down for the bandblock. The only way I can make it look ok

Use nanoVNA Partner v0.20 link: https://gofile.io/?c=MZf5xz

With an RF instrument such as a VNA that measures down into the "noise", an RF source in immediate proximity to low-level electronics is NOT a good idea!! Compression of linear devices in the