On Sun, Feb 16, 2014 at 2:33 PM, Bob Camp <[email protected]> wrote: > On all these counters, you need to switch to DC input for 1 pps signals. > You also need to manualy set the trigger level to something like +1.5V.
I can't believe I'm disagreeing with Bob Camp but this is not my experience. 99.9% of the time preset trigger works fine and I think you should start with that. AC coupling almost always works and is sometimes required (with the Rb I think). I have a 5335A (w/ opt 010+040) and have measured 1PPS on my PRS-10, Fury, Firefly and random GPS parts. If the trigger light is not flashing at 1 Hz the only thing I've ever had to do is toggle AC coupling or enable 1PPS output on the device (or plug it in). Sometimes increasing the gate time tidies up the display. _______________________________________________ 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.
