On Thu, 05 Jan 2012 01:44:13 -0800, Hal Murray <hmur...@megapathdsl.net> wrote:
>albertson.ch...@gmail.com said: >> >> Have an older Tek 465 scope that is in only "fair" shape and I see nothing >> on that pin but milivolt level sine wave of about 60MHz. I can't set the >> scope to show any hint of a PPS ... > >I do have a 465. You should be able to see a 1 uSec PPS. 60MHz is about a 6nS rise time and is easily fast enough to see it. >Now turn up the Intensity until you can see the pulse. It might help to turn >down the room lights. This is the problem. With a 1 second repetition rate, the brightness is going to be very low. The old ways of viewing such a low repetition rate signal include using a hood or dark room, special CRT phosphors, photographic film, MCP (micro channel plate) intensified CRTs, and of course analog storage and later digital storage. _______________________________________________ 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.
