(Hopefully this is not a duplicate post... hotmail has been having issues)
The FA1 is a small, USB powered frequency counter. You supply it with a 10
MHz reference and an input frequency of 1 .. 80 MHz. It outputs a text string
of the measured frequency every second. They cost around $80 .. $120.
Apparently there is a PLL inside... the text string has a "PLL unlock" flag.
There is no info on how it works and I have not opened mine up.
I did a simple noise test on one where the input and ref clocks were from a
Tbolt. It looks like the measurement noise is around +/- 0.0002 Hz.
Lady Heather can now read it. Attached is a screen capture of the noise test.
_______________________________________________
time-nuts mailing list -- time-nuts@lists.febo.com
To unsubscribe, go to
http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com
and follow the instructions there.
