David Eduardo wrote:
"Scott Dorsey" wrote in message
...
In article , wrote:
I've been trying to get an AM signal at my job which is in a large
steel factory. Today I heard about HD radio and naturally I wonder if
this is still an AM signal that will not penetrate a metal building or
is an HD signal a more easily recievable signal that we are used to in
AM?

From what I have seen, the IBOC FM signal is maybe a little bit more
robust than the analogue signal. So if the FM reception is a little
marginal, you may still be able to get the HD broadcast from that station.

On the other hand, IBOC AM is less robust than the analogue signal, so
if the AM station is marginal, you probably won't be able to get the IBOC
AM signal from it at all.

Our experience at KTNQ is the oppostite. Many places where the analog signal
is noisy have HD reception that is pristine.

HD expands the coverage area of KTNQ due to the high noise level on the
analog signals in LA.

My experience is entirely in rural areas where most of the issue is QRM
from power lines and other local sources, but where adjacent-channel
interference in the daytime is nonexistent. Where does the high noise
level in LA come from?
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."