"Telamon" wrote in message
...
In article ,
"David Eduardo" wrote:

"Telamon" wrote in message
...
In article ,
"David Eduardo" wrote:

"IBOCcrock" wrote in message
oups.com...

The digital signals are only 1% of the analog - IBOC's coverage
isn't
even 50% that of analogs !


Digital has totally different properties than analog. I have seen
plenty
of
data showing the HD signal, on a 3rd generation receiver, is robust
beyond
the "usable" signal range of analog AM or FM, which is the 10 mv/m AM
curve
and the 64 dbu FM contour.

Gee, to bad you don't understand what that means.

I understand perfectly. I did one of the first studies of listenership
vs.
signal strength over a decade ago.

I'm pretty sure reading your posts you have no understanding volts per
meter means. I don't think you know what dBu is either.


As stated previously, I actually built the first FM station in Ecuador from
scratch, including transmitter, studio gear and antenna. I certainly know
what the terms of field strength mean. I think anyone who can build an FM
exciter from scratch probably can understand voltages pretty well.

I have also lugged field strength meters around various FCC jurisdictions
while working on directional antenna patterns ranging from WEEL to WQII to
KTNQ.

The minimum contour for FM stations to get significant listening is the 64
dbu, roughly 1.5 mv/m. For AM in metros, it is about 10 mv/m. Both AM and FM
are measurements of the strength of the EMF from a transmitter at some point
of distance from it dBu used to be called dBv but got confused with dBV,
and was changed. It's a decibel measurement of voltage.... as my equivalency
shows.

The whole point here is that the average listener... about 96% to 97% of
them, in fact, will not listen to a signal below a certain level and all but
three to four percent of stationary AM and FM listening in rated metros
comes from areas within the 10 vv/m and 64 dbu contours of AM and FM
stations.