); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Hi:
Here is a plot from 0 to 200 kHz that shows LORAN-C, WWVB and the interfering military RTTY stations. http://www.prc68.com/I/Images/AMRAD_BT.GIF Ext Ref is the GPS locked PRS10 Rb. Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam [EMAIL PROTECTED] wrote: > ); SAEximRunCond expanded to false > Errors-To: [EMAIL PROTECTED] RETRY > > Stan's comments below about his noted errors between > LORAN & GPS that range from E10 to E13 each day remind me > of the similar errors that I have observed. > > I had originally attributed them to ground-wave vs. sky-wave > propagation on the LORAN side. But I know that the LORAN > system encoding is intended to be resistant to such propagation > situations. > > I have not made the effort to fully quantify my particular > measurements. But I do routinely observe my Austron 2100F > showing an almost diurnal change in displayed error when > using it as the measurement system against an HP-5061 or Z3801A. > > Can someone confirm that the E10 to E13 errors are typical > of the 2100F? And what ultimate long-term stability have others > been able to achieve using LORAN as a reference? > > Thanks in advance, > -Brian, WA1ZMS > > > > -----Original Message----- > <snip> > I have gotten a 4 parts in E13 comparison between the LORAN-C and the > GPS disciplined oscillator, > at least for a short time, multiple times a day. > Most readings are between E10 an E13 comparing the GPS DO and the > Loran-C RX. > probably bouncing due to the propagation paths and propagation > perturbations. > <snip> > > Stan, W1LE FN41sr Cape Cod > > > > > > > [EMAIL PROTECTED] wrote: > > >>Hello: >> >>My different types of equipment (scope, freq cntr, spec analyzer, etc) > > never seem to be right on the money, so I decided to run them all off a > commnon exact 10MHz rubidium source. > >>I got an FE-5680A (was on a chopped off ckt board-whcih is apparently part > > of some motorola system pcb)..I hooked pin 1 to +15V & pins 2 to gns ...but > nothing came out any of the other pins?!?? Where is the output? Do I need > another cxonnection? I read you might need to apply +5v, but don't want to > try unless I know what I'm doing. How do you determine what option your > unit has? It looks like about 60 options are possible!! By the way, with > my spec analyzer probe nearby I am sniffing the 6.834xx GHz signal-so the Rb > is in there doing its thing. > >>As a second note, as I read around here, it seems (to my understanding) > > that the Rb osc is not exact--that in fact it needs calibrated!! Well, I > dont't want to cal it --I bought this "atomic clock" to let me cal all of > my various xtal oscilators. How on earth shall I cal this thing? If I > don't cal, how far off is it? Can i count on 9 digits of accuracy with "no > cal" > >>a >>thanks for your hints & direction....I think I'll enjoy this group & hope > > to make some contibutions once I get going. > >>_______________________________________________ >>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. > > > _______________________________________________ > 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.
