azelio.boriani@gmail.com said: > It helps to have a digitizer on the line, a 'scope to sample the line, say, > 20 seconds before and 20 second after a glitch. This way you can surely tell > what happened without any speculation. There are a number of ready made > digitizers (red-pitaya, digilent analog discovery, ...) The audio input on a PC also works. With stereo, you can watch both sides of the 120/240 line in a typical US house. -- These are my opinions. I hate spam.

Hi At some point the rational question would be - how does this relate to timing? Getting a sound card so that it will do a reasonable job of time tagging edges can be “fun”. My approach was always to feed a “known” signal into that second channel ….. Bob > On Mar 31, 2020, at 8:46 PM, Hal Murray <hmurray@megapathdsl.net> wrote: > > > azelio.boriani@gmail.com said: >> It helps to have a digitizer on the line, a 'scope to sample the line, say, >> 20 seconds before and 20 second after a glitch. This way you can surely tell >> what happened without any speculation. There are a number of ready made >> digitizers (red-pitaya, digilent analog discovery, ...) > > The audio input on a PC also works. With stereo, you can watch both sides of > the 120/240 line in a typical US house. > > > -- > These are my opinions. I hate spam. > > > > > _______________________________________________ > 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.