Hal, Certainly true. The UT+ is programmable so that you can disable the 1PPS altogether, disable it if TRAIM fails, or disable it if the receiver is not tracking at least one satellite. The default condition is for the 1PPS to be on all the time. Many systems require that the 1PPS stay on when satellite tracking has been lost because the 1PPS may trigger another event that must not be interrupted. In that case the systems continues to process data, but they also note that the 1PPS error flag is has been raised in the output messages. How you use it is totally up to you.
Randy ________________________________________________________________________ __________________________________________________ -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Hal Murray Sent: Thursday, May 04, 2006 1:15 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Oncore 1pps driver & LED > I'd like to put an LED near the Oncore module that blinks on the 1pps. > What's the best way to wire this up? Some GPS boxes turn off the PPS signal when they don't have enough good satellites. For those, a PIC works well as a LED driver: on solid when PPS is flapping, blinking when PPS is not changing, off when there is no power. Obviously you can use your favorite tiny CPU. I happened to have a PIC programmer handy. -- The suespammers.org mail server is located in California. So are all my other mailboxes. Please do not send unsolicited bulk e-mail or unsolicited commercial e-mail to my suespammers.org address or any of my other addresses. These are my opinions, not necessarily my employer's. I hate spam. _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
