> My recollection is that harmonics must be down 40 dB from the carrier. > That's .1 Watt for WCTC. You didn't say how strong a signal you are > receiving - if it's very strong it's surely more than .1 Watt and deserves a > mention. If it's a wispy DX level signal, they may be within legal limits > and wouldn't appreciate a false alarm. > > If the 40 dB rule has changed since I last had to know these things, I'm > sure one of our broadcast engineers will speak up right away.
The last time I had a spectrum test run at a client, I think the figure was -73db. It is measured about a kilometer away from the site. If the signal is -73db down from the fundamental, then it's good. I might be wrong on the figure, but I think it's more than 40db. What I would do on that station is make sure that the harmonics are heard at other locations. Sometimes they are locally generated by things like aluminum downspouts that have dirty of corroded junctions that form defacto diodes. Craig Healy Providence, RI _______________________________________________ IRCA mailing list [email protected] http://montreal.kotalampi.com/mailman/listinfo/irca Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers For more information: http://www.ircaonline.org To Post a message: [email protected]
