Tom, We had a similar problem at a BBC site when I was selling Datum in the UK. We managed to get round the problem with a better antenna. The third harmonic of the UHF wasn't slap bang on L1 but close enough with a basic GPS antenna to kill GPS.
Rob -----Original Message----- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Tom Miller Sent: 27 September 2012 18:44 To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Why the fuss? Under other issues, I have one where GPS could not be used. It was at a UHF TV station where the third harmonic fell right in the L1 band. A 220,000 watt UHF transmitter driving a gain antenna for 5 MW EIRP will always produce some third harmonic near the antenna. There was no access to GPS within 1 km of the site. They were using the WWVB signal as the time and frequency reference. Luckily, the conversion the DTV moved them to a new channel and now they can use the GPS. Tom ----- Original Message ----- From: "Bob Camp" <li...@rtty.us> To: "'Discussion of precise time and frequency measurement'" <time-nuts@febo.com> Sent: Thursday, September 27, 2012 1:02 PM Subject: Re: [time-nuts] Why the fuss? Hi Right here in PA for one. You essentially can not buy a new house without there being various conditions written into the title. One universal one is "no antennas". The only exception is for one 19" sat dish for TV, since that's a federal mandate. Bob -----Original Message----- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of brent evers Sent: Thursday, September 27, 2012 10:57 AM To: j...@quikus.com; Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Why the fuss? Zoning, Legal? Where? Brent On Thu, Sep 27, 2012 at 10:41 AM, J. Forster <j...@quikus.com> wrote: > Because: > > LORAN-C is gone. > > Not all can use GPS because of siting, horizon, zoning, legal, and other > issues. Not everyone can erect antenna towers. > > There is nothing else, except perhaps WWV or CHU on HF. > > -John > > ================== > > > >> I cannot think of a time-nuts WWVB reference requirement >> that cannot be better satisfied with a GPSDO. >> >> Will NIST publish a public domain reference circuit? >> That would allay patent concerns. >> >> -- >> Chuck Forsberg WA7KGX N2469R c...@omen.com www.omen.com >> Developer of Industrial ZMODEM(Tm) for Embedded Applications >> Omen Technology Inc "The High Reliability Software" >> 10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430 >> >> >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. >> >> > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.