I bought a random cheap crystal oscillator off AliX. It was advertised as a “constant temperature crystal reference”.
I also didn’t know what voltage it took. I found a photo of a similar one which apparently needed 12 V. However, smoke started coming out when I tried 12 V.
It seems to oscillate OK on 5 V though. However, it seems to be fluctuating in frequency, and I don’t know if this is normal, or whether I have damaged it.
Just zoom out so the plot min and max is 10000001 to 100000002 so the line becomes flat. I think that’ll fix the issue. /s
Honestly no idea but is it supposed have a bigger frequency swing or is no variance supposed to occur? It seems like the range is .0008 Hz which is a fairly flat line but your y-axis is very zoomed in.