Bob,
I still have trouble understanding how the content delivery mechanism --
whether it be satellite, T1, or a less sophisticated telco type service --
could produce fluctuations in the carrier frequency.
As I mentioned, it seems to me that for a wobbling heterodyne to be created
by beating a local oscillator against the received signal, the variations
would have to be in the carrier, not in the modulation. I'm probably missing
something very simple, or something beyond my pay grade.
Anyway, with all the questions still out there, no proposed explanation can
be dismissed. Unfortunately, for me at least, not all of them can be
understood either.
As to your proposed approach to tracking down info on the origins and
delivery mechanisms of Cuban broadcast content, it sounds like a great idea.
While I am situated in a daytime ground wave location, I don't have the
equipment to measure short delays between stations. Maybe someone else can
look into this idea.
W. Curt Deegan
Boca Raton, (South East) Florida
http://ScooterHound.com/WWWR/wobbler/