[email protected] said: > While i am on, can anyone suggest a reasonably priced unit that has a 1pps > output, NMEA and a built in antenna. Because I want to use this with an 8 > bit embedded system I am probably not going to be able to hack one of the > many cheap USB dongle GPS's.
Garmin GPS 18x-LVC GlobalSat MR-350 http://support.ntp.org/bin/view/Support/InexpensiveOemGps [email protected] said: > ...And don't forget that the PPS pulse is very narrow so you have to use a > 'scope with memory, a digital 'scope or turn the brightness at max. Most scopes that I've used have some sort of indication if they are/aren't getting triggered, so even if you can't see the pulse you can tell if there is a pulse there. Sometimes, it helps to run in Triggered mode rather than Auto. If you are using Auto, at least with the Rigol DS1102E, it may take a while to lock up. I assume it searches for a while, doesn't find anything, so it stops to display the current buffer. While it is stopped, the pulse happens. I don't know how big the blind spot is, but it takes several seconds to show a PPS signal. Works fine in Triggered mode as long as you are happy without seeing anything when the trigger doesn't happen. [email protected] said: > The pulse from my T-Bolt is on the order of 1uS wide. Interesting. Mine is 10 uS wide. Rev E, 5/31/05 -- These are my opinions. I hate spam. _______________________________________________ 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.
