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1) Be sure your coax is less than 1/4-wavelength long in the coax (considering Vp). Conversely, be sure your measurement frequency of measurement is less than the electrical length of the cable. 2)

Display, scale... Set to 0.2 (to multiply resolution by 5)... Dg9bfc sigi Am 07.11.2023 21:58 schrieb "Russell C. Nixon" <rcnixon@...>:

Can someone point me to a reference in the Wiki for screen scaling? I’m trying w1aew’s method for determining the characteristic impedance of an unknown piece of coax as an exercise. I’m getting

Tom, let me ping my friend in Woodland Park, Co., who retired from the scope division of HP about probe design. You've got my curiosity go'n. I'll report back. Dave - W?LEV

Hello Fran?ois, Yes, I've just tried an off-on power cycle with a fresh OSL calibration and all of the chart is now inside the perimeter circle.When I cycle the power on my nanoVNA it resets

I forgot that the group website inhibits direct downloading of EXE files, probably to protect the user against viruses. You can download check.exe here: http://ham-radio.com/k6sti/mu.htm Before

Use this Windows utility to check for reflection coefficient magnitudes > 1. It may provide insight when results are odd. http://ham-radio.com/k6sti/check.exe Brian

Gee, Dave . . . -632 ohms?? If you parallel it with a reaonator, does it oscillate?? ;-) I don't remember the 10430A exactly, and I'm too lazy to look it up, but typically the cable is rather high

Hello I use: - NanoVNA-F - nanovna-saver I often had this type of problem with traces on the Smtith coming out of the circle. I realized that if I RESET the nanaoVNA (directly on the box), before

Well spotted Mike! Cheers...Bob VK2ZRE

In the top left of the screen, it says "CH0 SMITH 0.5FS" - that means that the scale is set to half of full-scale, ie: it's zoomed in so that the outer ring of the smith chart is showing a magnitude

Not sure I follow you there Dave. I did an OSL before the measurement. How can any plot be beyond the perimeter given the right hand side perimeter represents infinity? Yes, the right hand side of the

Ah, but the VNA doesn't measure real and reactive impedance independently. It measures reflection coefficient, which, in this case has magnitude extremely close to 1.0. The VNA has only a finite

Not sure I follow you there Dave. I did an OSL before the measurement. How can any plot be beyond the perimeter given the right hand side perimeter represents infinity? Yes, but it isn't, it's outside

QUOTE: I attempted to generate a Smith chart using my NanoVNA and got the plots below. Port 0 is connected to an oscilloscope probe (x10) using a BNC adapter. Other end of the probe is connected to an

Hi, I attempted to generate a Smith chart using my NanoVNA and got the plots below. Port 0 is connected to an oscilloscope probe (x10) using a BNC adapter. Other end of the probe is connected to an

Thanks Istvan. I am working on LPWAN sub-GHZ chips and antennas, LoRa, sigfox, NB-IoT. 73, Joe W2JEJ

This would get a better response if you posted it on this link. [email protected] *Clyde K. Spencer*

The V2 does not replace the 'current' model. It's more advanced, wider frequency range, and substantially more expensive. The original model is also still current, and still gets firmware updates. The

To measure a transistor, you should use a vna, bias tee and you do the calibration, with the bias tee and the cables. Then the calibration reference plane is near the transistor. (In the best case, in