[time-nuts] 60 Hz line quirks, anybody recognize this stuff?

[Arthur Dent]

> IMO, you have an instrumentation issue. I don't think the power grid can
> do anything like that.
>
> YMMV,
>
> -John

I agree. If this was happening on the grid by the time this blip had 
traveled down the line  to you it would have been so filtered through 
transformers and other devices and you wouldn't see sharp edges 
on the waveform but see a slightly rounded distorted waveform, not 
the sharp transitions you are seeing. If it isn't your test equipment 
then it is still something local to you like a loose electrical connection 
in your house momentarily causing your voltage to drop and then 
it arcs to reconnect the power. If you use an AM radio (not use a 
radio in the A.M. ;-) ), you could hear this as static or clicks as you 
observe this waveform on the screen. 

-Arthur