What 'scope are you using (brand and model)? TLL is 5V, CMOS 4000 series can be 15V but runs starting at 3V. Set the scope vertical (channel 1) at 1V/div (probe at 10:1), use NORMAL for the trigger and set the trigger (for the channel 1) *slowly* from 0V to +200mV (assuming that the trigger isn't aware of the 10:1) trying to follow the trigger indicator or the trace appearing on the screen.
On Fri, Aug 3, 2012 at 3:31 PM, <[email protected]> wrote: > Doug, > > > I ran into a wiki description of GPS using WGS84 a couple days ago. It > > included a mention of ESEC and it was something like: Earth Static, > > Earth Centric. I think I was following a link about the Z3801A. > > > > It referred to the fact that lat-lon is referenced to a static grid on > > the Earth and doesn't change as the Earth rotates on its axis or around > > the sun. Earth static and Earth centric. > > That reference frame is called Earth Centered Earth Fixed (ECEF). And > that is what GPS is using "internally". However it is not lat/lon/h, but > cartesian with origo in the earth center, xy in the equatorial plane and z > pointing towards the north pole. > > http://en.wikipedia.org/wiki/ECEF > > -- > > Björn > > > > _______________________________________________ > 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. > _______________________________________________ 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.
