> I hooked up a 47k resistor from line to the 50 ohm input of my 5334B and it > "just worked." That's something I wouldn't do. It's too easy to forget to push the 50 ohm button. I might do it if I had a handy 50 ohm terminator built into a BNC pass through. That would be easy to verify with a quick glance. > I am watching the 60 Hz drift all around as I type this (although not all > that far, seems to be holding within 0.01 Hz tonight). I'm surprised you are that close. How long have you been watching? I think 0.1 Hz (low) is where the US power companies have to file paperwork so they try (very) hard to avoid getting that low. Here is what I saw. Each data point is averaging over 10 seconds. http://www.megapathdsl.net/~hmurray/time-nuts/60Hz/60Hz-Jul11-12-freq.png -- These are my opinions, not necessarily my employer's. I hate spam.

Hal, I don't know what I'd do if i had reliable power like that. Here at work (the lab) It's normal to see outliers of anything between 58hz and upper 63. As I had commented before, this power distribution in this area is terrible (South Western Pennsylvania) Steve On Wed, Nov 30, 2011 at 3:06 PM, Hal Murray <hmurray@megapathdsl.net> wrote: > > > I hooked up a 47k resistor from line to the 50 ohm input of my 5334B and > it > > "just worked." > > That's something I wouldn't do. It's too easy to forget to push the 50 ohm > button. I might do it if I had a handy 50 ohm terminator built into a BNC > pass through. That would be easy to verify with a quick glance. > > > > I am watching the 60 Hz drift all around as I type this (although not > all > > that far, seems to be holding within 0.01 Hz tonight). > > I'm surprised you are that close. How long have you been watching? > > I think 0.1 Hz (low) is where the US power companies have to file paperwork > so they try (very) hard to avoid getting that low. > > Here is what I saw. Each data point is averaging over 10 seconds. > http://www.megapathdsl.net/~hmurray/time-nuts/60Hz/60Hz-Jul11-12-freq.png > > > -- > These are my opinions, not necessarily my employer's. I hate spam. > > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. >

On 11/30/2011 3:06 PM, Hal Murray wrote: >> I hooked up a 47k resistor from line to the 50 ohm input of my 5334B and it >> "just worked." > That's something I wouldn't do. It's too easy to forget to push the 50 ohm > button. I might do it if I had a handy 50 ohm terminator built into a BNC > pass through. That would be easy to verify with a quick glance. The unit is specified to be able to handle 200 volts DC + peak AC on the input in high impedance mode either X1 or X10. I just tried it and it has no problem with it. > > >> I am watching the 60 Hz drift all around as I type this (although not all >> that far, seems to be holding within 0.01 Hz tonight). > I'm surprised you are that close. How long have you been watching? A couple of hours. > > I think 0.1 Hz (low) is where the US power companies have to file paperwork > so they try (very) hard to avoid getting that low. > > Here is what I saw. Each data point is averaging over 10 seconds. > http://www.megapathdsl.net/~hmurray/time-nuts/60Hz/60Hz-Jul11-12-freq.png > >