On Sun, Feb 15, 2015 at 10:34 PM, Hal Murray <hmur...@megapathdsl.net> wrote: > > francesco.messi...@gmail.com said: >> I measured the PPS output with an HP-5328B, PPS of the thunderbolt as start, >> rising edge, rockwell PPS as stop, rising edge. The delay is 406.3 ms +/- 30 >> uS. > >> Are those numbers normal for a rockwell chipset? Any idea why the two PPS >> are so far apart? PPS offset on the thunderbolt is set to 0. > > Do you have a scope? What's the width of the Rockwell PPS?
yes, I have looked at the PPS shape, it's a 20ms positive pulse > > Are you triggering on the correct edge? Is there an inverter in there > someplace? > > I would try all 4 combinations of rising/falling edges and see if any of them > match cleanly. That could happen if the Rockwell PPS is 500 ms wide. I tried all 4 combinations (besides, the thunderbolt is set for positive PPS), the positive thunderbolt to positive rockwell is the closest of all at 406 ms. I can only suspect it was unlocked, but I need to setup all the test in another place closer to the window, since I don't have a splitter to use the same antenna of the thunderbolt. Thanks Frank _______________________________________________ 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.
