On Wed, 11 Jan 2012 08:35:56 -0600, Bob Smither <[email protected]> wrote:
>Joseph Gray wrote: >> I'm not seeing a PPS on either of these. All I see is about 17 mV P-P >> of noise that looks like a multi-stepped sine wave. I'm using a TDS >> 340 scope. > >I can see the 1 usec, 1pps on mine, but only if I use an analog storage scope. >Although my HP54000 series scope triggers at 1PPS, for the life of me I cannot >get it to display the 1 usec pulse :-(. You might need to darken the oscilloscope environment or use a viewing hood. Some analog non-storage oscilloscopes, either because of design or age, are not going to be able to display a short pulse at 1 second intervals. I tested this on my old but in good condition 2230 and it could display it dimly in normal room light but my older worn 7603 can not. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
