Hi all,
I wonder which is the correct procedure for testing a Crystal quartz.
Nano VNA has 0.6.0 firmware version and on PC NanoVNA Saver 0.2.2-1 is running .
A bit naively after calibration in the range 50 KHz - 60 MHz , I just connected output and input ports through a 10 MHz crystal to explore its characteristics, mainly serial R and Quality Factor .
Graphical results seems fair but calculated value in nanoVNA Saver are a bit odd:
Impedance = 55.32 - j3.7 ohm
Quality factor: 0.067
In additon i tried to run from nanoVNA Saver an analysis handling the filter as a pass band and got this time a Quality factor: 54924.73 - a bit higher but anyway very far away from typical quartz Q. The corresponding bandwidth at -3dB was 1.82 KHz.
Sorry was not able imbedding images in mail body, you can see them in the attached images.rtf file.
Any hint is appreciated ?
Stefano, I3VBP
