wrote

HD's channels are low-bitrate streams

The station has a certain digital HD bandwidth that they can utilize as they
wish. They can allocate the full HD bandwidth to a single channel for the
best sound. On FM that would result in a CD quality sound. Or they can divy
up the bandwidth into 2 or 3 channels for lesser quality sound in each
channel.

of the same repetitive programming

If a station chooses to transmit two (2) HD channels, and many do, the
second HD channel's programming (HD2) is unique while the first HD channel
is the superioir sounding digital version of the analog signal broadcast.

causing adjacent-channel interference

Digital is digital - there is no static, noise, interference or fading
whatsoever on HD radio.

and with only 60% the coverage of analog.

Using 1/100th the power of the equivelent analog's signal carrier. Thus a
power savings to the station.

"Guerite©" wrote in message
...

and with only 60% the coverage of analog.

Using 1/100th the power of the equivelent analog's signal carrier. Thus a
power savings to the station.


And, as discussed, on FM the "used" coverage area is the 64 dbu curve. Over
80% of listening is in the 70 dbu, and the rest in the 64 to 69 dbu contour.

The HD signal at least matches the 64 dbu useful and used contour. On AM,
the HD signal is often listenable beyond the "used and useful" contour of
the analog signal.

"David Eduardo" wrote

On AM,
the HD signal is often listenable beyond the "used and useful" contour of
the analog signal.


My personal best HD DX catch on AM is about 1000 miles.
It is incredible to hear a digital AM DX signal locked in on a HD receiver.
Instant ID and far better reception than the analog signal.

On Mar 5, 7:36�pm, "David Eduardo" wrote:
"Guerite©" wrote in message

...



and with only 60% the coverage of analog.

Using 1/100th the power of the equivelent analog's signal carrier. *Thus a
power savings to the station.

And, as discussed, on FM the "used" coverage area is the 64 dbu curve. Over
80% of listening is in the 70 dbu, and the rest in the 64 to 69 dbu contour.

The HD signal at least matches the 64 dbu useful and used contour. On AM,
the HD signal is often listenable beyond the "used and useful" contour of
the analog signal.

HD/IBOC causes adjacent-channel interference and has only 60% the
coverage of analog.

wrote in message
ups.com...
On Mar 5, 7:36?pm, "David Eduardo" wrote:
"Guerite" wrote in message

...



and with only 60% the coverage of analog.

Using 1/100th the power of the equivelent analog's signal carrier. Thus
a
power savings to the station.

And, as discussed, on FM the "used" coverage area is the 64 dbu curve.
Over
80% of listening is in the 70 dbu, and the rest in the 64 to 69 dbu
contour.

The HD signal at least matches the 64 dbu useful and used contour. On AM,
the HD signal is often listenable beyond the "used and useful" contour of
the analog signal.

HD/IBOC causes adjacent-channel interference and has only 60% the
coverage of analog.

There is a difference between arbitrary signal contours and a usable signal.
The FM HD coverage is about the same as the usable, useful FM analog signal,
and in noisy markets, the AM HD in some cases extends beyond the usable
analog contour, especially at night if the protected contour is a high
value.

On Mar 5, 7:23�pm, "Guerite�" wrote:
wrote

HD's channels are low-bitrate streams

The station has a certain digital HD bandwidth that they can utilize as they
wish. *They can allocate the full HD bandwidth to a single channel for the
best sound. On FM that would result in a CD quality sound. Or they can divy
up the bandwidth into 2 or 3 channels for lesser quality sound in each
channel.

of the same repetitive programming

If a station chooses to transmit two (2) HD channels, and many do, the
second HD channel's programming (HD2) is unique while the first HD channel
is the superioir sounding digital version of the analog signal broadcast.

causing adjacent-channel interference

Digital is digital - there is no static, noise, interference or fading
whatsoever on HD radio.

and with only 60% the coverage of analog.

Using 1/100th the power of the equivelent analog's signal carrier. *Thus a
power savings to the station.

HD/IBOC requires much more power than alaog broadcasting - you lose !

wrote in message
oups.com...
On Mar 5, 7:23?pm, "Guerite?" wrote:
wrote

HD's channels are low-bitrate streams

The station has a certain digital HD bandwidth that they can utilize as
they
wish. They can allocate the full HD bandwidth to a single channel for the
best sound. On FM that would result in a CD quality sound. Or they can
divy
up the bandwidth into 2 or 3 channels for lesser quality sound in each
channel.

of the same repetitive programming

If a station chooses to transmit two (2) HD channels, and many do, the
second HD channel's programming (HD2) is unique while the first HD channel
is the superioir sounding digital version of the analog signal broadcast.

causing adjacent-channel interference

Digital is digital - there is no static, noise, interference or fading
whatsoever on HD radio.

and with only 60% the coverage of analog.

Using 1/100th the power of the equivelent analog's signal carrier. Thus a
power savings to the station.

HD/IBOC requires much more power than alaog broadcasting - you lose !

Nope, it is a fraction of the power. A 50 kw AM uses a 500 watt HD signal on
the same frequency

David Eduardo wrote:

wrote in message
oups.com...
On Mar 5, 7:23?pm, "Guerite?" wrote:
wrote

HD's channels are low-bitrate streams

The station has a certain digital HD bandwidth that they can utilize as
they
wish. They can allocate the full HD bandwidth to a single channel for the
best sound. On FM that would result in a CD quality sound. Or they can
divy
up the bandwidth into 2 or 3 channels for lesser quality sound in each
channel.

of the same repetitive programming

If a station chooses to transmit two (2) HD channels, and many do, the
second HD channel's programming (HD2) is unique while the first HD channel
is the superioir sounding digital version of the analog signal broadcast.

causing adjacent-channel interference

Digital is digital - there is no static, noise, interference or fading
whatsoever on HD radio.

and with only 60% the coverage of analog.

Using 1/100th the power of the equivelent analog's signal carrier. Thus a
power savings to the station.

HD/IBOC requires much more power than alaog broadcasting - you lose !

Nope, it is a fraction of the power. A 50 kw AM uses a 500 watt HD signal on
the same frequency

And pumps out 50kW of QRM!

In article ,
"David Eduardo" wrote:

wrote in message
oups.com...
On Mar 5, 7:23?pm, "Guerite?" wrote:
wrote

HD's channels are low-bitrate streams

The station has a certain digital HD bandwidth that they can utilize as
they
wish. They can allocate the full HD bandwidth to a single channel for the
best sound. On FM that would result in a CD quality sound. Or they can
divy
up the bandwidth into 2 or 3 channels for lesser quality sound in each
channel.

of the same repetitive programming

If a station chooses to transmit two (2) HD channels, and many do, the
second HD channel's programming (HD2) is unique while the first HD channel
is the superioir sounding digital version of the analog signal broadcast.

causing adjacent-channel interference

Digital is digital - there is no static, noise, interference or fading
whatsoever on HD radio.

and with only 60% the coverage of analog.

Using 1/100th the power of the equivelent analog's signal carrier. Thus a
power savings to the station.

HD/IBOC requires much more power than alaog broadcasting - you lose !

Nope, it is a fraction of the power. A 50 kw AM uses a 500 watt HD signal on
the same frequency

This is pure baloney. Same crapola the DRM crowd tried to pass off on
the general public.

--
Telamon
Ventura, California

"Telamon" wrote in message
...

Nope, it is a fraction of the power. A 50 kw AM uses a 500 watt HD signal
on
the same frequency

This is pure baloney. Same crapola the DRM crowd tried to pass off on
the general public.

Check the technical specs. We are installing a new Nautel RX 50, which does
50 kw analog and 500 watts digital on AM.

In Band On Channel has 1/100th of the analog signal in the digital mode.