The Cyndustries List

Hi All,
first, I've to do further investigations (i.e. testing the other two 
ZOs) but this question upfront:

I hooked up my first ZO (the other two are still in the box) and while 
playing around I noticed an audible jitter on the pulse/square output.

I'll have to see that on my scope but has anyone experienced such a 
thing? The other waveforms seem to be stable.
Further testing follows later today ...

   Thanks, Michael.