The three I mentioned: KFWB 980, KNX 1070, and KDIS 1110 are usually
well within 1 mHz when operating on their GPS referenced
exciters. Do not be fooled by thinking that just because a station
is operating in the IBOC digital mode that they will be GPS
referenced. As I mentioned before, not all stations bother to
install the GPS antenna and some have the antenna connected but have
not enabled the GPS - Don't ask me why. I have also found some
exciters that claim they have satellites but for one reason or
another they did not lock.
Burt, K6OQK
Paul wrote:
>Curious if anyone knows of central or eastern US stations that would
>be gps locked.
I believe the following are:
710 WOR New York
810 WGY Schenectady*
860 CJBC Toronto*
880 WCBS New York
960 WELI New Haven
1000 WMVP Chicago*
1030 WBZ Boston
1060 KYW Philadelphia*
1140 WRVA Richmond*
1180 WHAM Rochester
Note that the synthesizer used to generate the carrier from the GPS
source may not have a resolution of exactly 1.000000 Hz, so some of
the GPS-locked stations are off nominal by one or two tenths of a
Hz. The stations with asterisks above are examples. Also, note that
atmospheric effects phase-modulate the skywave path, so expect as
much as +/- 0.5 Hz wander (usually less) on DX carriers at
night. Finally, the stations will not always be running with GPS
discipline (during maintenance, failures, etc.).
Best regards,
Charles
Burt I. Weiner Associates
Broadcast Technical Services
Glendale, California U.S.A.
[email protected]
www.biwa.cc
K6OQK
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