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" <[email protected]>
To: "'Discussion of precise time and frequency measurement'"
<[email protected]>
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: [email protected] [mailto:[email protected]] On
Behalf Of brent evers
Sent: Thursday, September 27, 2012 10:57 AM
To: [email protected]; 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 <[email protected]> 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 [email protected] 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
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