[Steven]

On Oct 11, 8:16 pm, Telamon
wrote:
In article . com,





SFTV_troy wrote:
David Eduardo wrote:
"SFTV_troy" wrote in message

There is no technical difference. Both HD radio and DRM operate on
the same principles:
- 2 separate signals
- 1 analog
- 1 digital
- the digital is simulcast "next to" the original analog signal

No, DRM is 100% digital. To run analog simultaneously you need a separate
frequency. Some testing is being done, like that in Mexico, by placing the
DRM signal on the adjacent AM channel... a station on 1060 is going to have
DRM on 1070.

And I repeat:

HD radio works the same way. The digital signal sits *next to* the
station at 1070.

If you took a buss how many people would sit down next to you?

The owner of the store selling the fuses. If they are littelfuses, he
might get away with it.

[Steven]

On Oct 11, 8:44 pm, Steven wrote:
On Oct 11, 8:16 pm, Telamon





wrote:
In article . com,

SFTV_troy wrote:
David Eduardo wrote:
"SFTV_troy" wrote in message

There is no technical difference. Both HD radio and DRM operate on
the same principles:
- 2 separate signals
- 1 analog
- 1 digital
- the digital is simulcast "next to" the original analog signal

No, DRM is 100% digital. To run analog simultaneously you need a separate
frequency. Some testing is being done, like that in Mexico, by placing the
DRM signal on the adjacent AM channel... a station on 1060 is going to have
DRM on 1070.

And I repeat:

HD radio works the same way. The digital signal sits *next to* the
station at 1070.

If you took a buss how many people would sit down next to you?

The owner of the store selling the fuses. If they are littelfuses, he
might get away with it.

AH! STEREO FUSES!

[RHF]

On Oct 11, 11:53 am, RHF wrote:
On Oct 11, 5:48 am, SFTV_troy wrote:





RHF wrote:
On Oct 9, 10:13 am, SFTV_troy wrote:
Hein ten Horn wrote:
wrote:

Okay. By that reasoning, because HD Radio sits "next to" the AM
signal, then it is not IBOC either. It is a simulcast format.
Do you agree with that statement?

As a whole? No.

- There is no technical difference.
- Both HD radio and DRM operate on the same principles:
- 2 separate signals
- 1 analog
- 1 digital
- the digital is simulcast "next to" the original analog signal

iBquity's IBOC Broadcast System is 'Intrinsic'
DRM's Simulcast Broadcast Scheme is NOT 'Intrinsic'

- That distinction is more about FAITH, than reality.

- There's no real difference between DRM's version
- (sitting next-to the AM signal) and HD's version
- (also sitting next-to the AM signal).


- SFTV,
-
- BLATANTLY TECNICALLY WRONG !
- ARE YOU SURE YOU ARE AN "EE" ?
-
- us lesser beings would like proof ~ RHF
- .

SFTV,

IBOC AM/MW "HD" Radio - Hybrid Mode
http://www.dallas.net/~jvpoll/rfi/AM...BOC_Mask10.gif
- Lower Digital Sidebands {Co-SideBand}
* Analog Host Signal (Mono) {Nested}
+ Upper Digital Sidebands {Co-SideBand}
-Note- The IBOC Signa supports the current AM Mono Signal as well as
the Digital {IBOC} Signal. Provides for 40kbps Data Rate, for Full
Stereo plus a Low Speed Data Path. Audio 36kbps, Song Title and Artist
4kbps .
http://www.rthk.org.hk/about/digital...#slide0143.htm

[RHF]

On Oct 11, 11:51 am, RHF wrote:
On Oct 11, 5:43 am, SFTV_troy wrote:





David Eduardo wrote:
"SFTV_troy" wrote in message

There is no technical difference. Both HD radio and DRM operate on
the same principles:
- 2 separate signals
- 1 analog
- 1 digital
- the digital is simulcast "next to" the original analog signal

No, DRM is 100% digital. To run analog simultaneously you need a separate
frequency. Some testing is being done, like that in Mexico, by placing the
DRM signal on the adjacent AM channel... a station on 1060 is going to have
DRM on 1070.

And I repeat:

- HD radio works the same way.
- The digital signal sits *next to* the station at 1070.


- SFTV,
-
- BLATANTLY TECNICALLY WRONG ARE YOU SURE YOU ARE AN "EE" ?
-
- us lesser beings would like proof ~ RHF
- .

SFTV,

iBquity's IBOC Hybrid Mode for AM/MW "HD" Radio
http://www.dallas.net/~jvpoll/rfi/AM...BOC_Mask10.gif

- Lower Digital Sidebands {Co-SideBand}

0 Analog Host Signal (Mono) {Nested}

+ Upper Digital Sidebands {Co-SideBand}

* The Three (3) Signals are Combined into 'a' "Single"
Unified Broadcasting System. {Intrinsic}

-Note- The IBOC Signa supports the current AM Mono Signal as well as
the Digital {IBOC} Signal. Provides for 40kbps Data Rate, for Full
Stereo plus a Low Speed Data Path. Audio 36kbps, Song Title and Artist
4kbps .

[SFTV_troy]

RHF wrote:
On Oct 11, 5:48 am, SFTV_troy

- There's no real difference between DRM's version
- (sitting next-to the AM signal) and HD's version
- (also sitting next-to the AM signal).


IBOC AM/MW "HD" Radio - Hybrid Mode
http://www.dallas.net/~jvpoll/rfi/AM...BOC_Mask10.gif
- Lower Digital Sidebands {Co-SideBand}
* Analog Host Signal (Mono) {Nested}
+ Upper Digital Sidebands {Co-SideBand}



Thanks for proving my point. HD sits *next to* the AM signal (+/- 10
kHz). Same as DRM sits *next to* the AM signal (+ or - 10 kHz).

[SFTV_troy]

RHF wrote:
On Oct 11, 5:48 am, SFTV_troy

- There's no real difference between DRM's version
- (sitting next-to the AM signal) and HD's version
- (also sitting next-to the AM signal).


IBOC AM/MW "HD" Radio - Hybrid Mode
http://www.dallas.net/~jvpoll/rfi/AM...BOC_Mask10.gif
- Lower Digital Sidebands {Co-SideBand}
* Analog Host Signal (Mono) {Nested}
+ Upper Digital Sidebands {Co-SideBand}



Thanks for proving my point. HD sits *next to* the AM signal (+/- 10
kHz). Same as DRM sits *next to* the AM signal (+ or - 10 kHz).

[RHF]

On Oct 12, 8:52 am, SFTV_troy wrote:
RHF wrote:
On Oct 11, 5:48 am, SFTV_troy

- There's no real difference between DRM's version
- (sitting next-to the AM signal) and HD's version
- (also sitting next-to the AM signal).

IBOC AM/MW "HD" Radio - Hybrid Mode
http://www.dallas.net/~jvpoll/rfi/AM...BOC_Mask10.gif
- Lower Digital Sidebands {Co-SideBand}
* Analog Host Signal (Mono) {Nested}
+ Upper Digital Sidebands {Co-SideBand}


- Thanks for proving my point. HD sits *next to* the AM signal (+/-
10
- kHz). Same as DRM sits *next to* the AM signal (+ or - 10 kHz).

SFTV - There you go again being Factually Wrong -and-
Clearly Misstating the Technical Specifications.

DRM = Simulcast without Specification {Sans-Mask}
x x x Does Not Equal x x x
IBOC = Intrinsic {Mask} : Nested Analog + Two Digital Co-Sidebands
http://electronicdesign.com/Files/29.../Figure_02.gif

SFTV - It is now becoming very obvious to all :
That you got your claimed 'ee' degree;
straight-out of a Box of Cracker-Jacks.

i b oc'd ~ RHF

[RHF]

On Oct 12, 8:52 am, SFTV_troy wrote:
RHF wrote:
On Oct 11, 5:48 am, SFTV_troy

- There's no real difference between DRM's version
- (sitting next-to the AM signal) and HD's version
- (also sitting next-to the AM signal).

IBOC AM/MW "HD" Radio - Hybrid Mode
http://www.dallas.net/~jvpoll/rfi/AM...BOC_Mask10.gif
- Lower Digital Sidebands {Co-SideBand}
* Analog Host Signal (Mono) {Nested}
+ Upper Digital Sidebands {Co-SideBand}

- Thanks for proving my point. HD sits *next to* the AM signal (+/-
10
- kHz). Same as DRM sits *next to* the AM signal (+ or - 10 kHz).

SFTV - There you go again being Factually Wrong -and-
Clearly Misstating the Technical Specifications.

DRM = Simulcast without Specification {Sans-Mask}
x x x Does Not Equal x x x
IBOC = Intrinsic {Mask} : Nested Analog + Two Digital Co-Sidebands
http://electronicdesign.com/Files/29.../Figure_02.gif

SFTV - It is now becoming very obvious to all :
That you got your claimed 'ee' degree;
straight-out of a Box of Cracker-Jacks.

i b oc'd ~ RHF

[SFTV_troy]

RHF wrote:
On Oct 12, 8:52 am, SFTV_troy wrote:
RHF wrote:
On Oct 11, 5:48 am, SFTV_troy

- There's no real difference between DRM's version
- (sitting next-to the AM signal) and HD's version
- (also sitting next-to the AM signal).

IBOC AM/MW "HD" Radio - Hybrid Mode
http://www.dallas.net/~jvpoll/rfi/AM...BOC_Mask10.gif
- Lower Digital Sidebands {Co-SideBand}
* Analog Host Signal (Mono) {Nested}
+ Upper Digital Sidebands {Co-SideBand}

- Thanks for proving my point. HD sits *next to* the AM signal (+/-

- 10 kHz). Same as DRM sits *next to* the AM signal (+/- 10 kHz).



DRM = Simulcast without Specification {Sans-Mask}
x x x Does Not Equal x x x
IBOC = Intrinsic {Mask} : Nested Analog + Two Digital Co-Sidebands



I still don't see the difference. Both standards are using sidebands,
adjacent to the analog AM signal.

[SFTV_troy]

RHF wrote:
On Oct 12, 8:52 am, SFTV_troy wrote:
RHF wrote:
On Oct 11, 5:48 am, SFTV_troy

- There's no real difference between DRM's version
- (sitting next-to the AM signal) and HD's version
- (also sitting next-to the AM signal).

IBOC AM/MW "HD" Radio - Hybrid Mode
http://www.dallas.net/~jvpoll/rfi/AM...BOC_Mask10.gif
- Lower Digital Sidebands {Co-SideBand}
* Analog Host Signal (Mono) {Nested}
+ Upper Digital Sidebands {Co-SideBand}

- Thanks for proving my point. HD sits *next to* the AM signal (+/-

- 10 kHz). Same as DRM sits *next to* the AM signal (+/- 10 kHz).



DRM = Simulcast without Specification {Sans-Mask}
x x x Does Not Equal x x x
IBOC = Intrinsic {Mask} : Nested Analog + Two Digital Co-Sidebands



I still don't see the difference. Both standards are using sidebands,
adjacent to the analog AM signal.

[David Eduardo]

"SFTV_troy" wrote in message
ps.com...

RHF wrote:
On Oct 12, 8:52 am, SFTV_troy wrote:
RHF wrote:
On Oct 11, 5:48 am, SFTV_troy

- There's no real difference between DRM's version
- (sitting next-to the AM signal) and HD's version
- (also sitting next-to the AM signal).

IBOC AM/MW "HD" Radio - Hybrid Mode
http://www.dallas.net/~jvpoll/rfi/AM...BOC_Mask10.gif
- Lower Digital Sidebands {Co-SideBand}
* Analog Host Signal (Mono) {Nested}
+ Upper Digital Sidebands {Co-SideBand}

- Thanks for proving my point. HD sits *next to* the AM signal (+/-

- 10 kHz). Same as DRM sits *next to* the AM signal (+/- 10 kHz).



DRM = Simulcast without Specification {Sans-Mask}
x x x Does Not Equal x x x
IBOC = Intrinsic {Mask} : Nested Analog + Two Digital Co-Sidebands



I still don't see the difference. Both standards are using sidebands,
adjacent to the analog AM signal.

DRM is not using a sideband; to do analog and digital requires a separate
transmitter for each on a separate carrier frequency. HD is a combined
analog and digital signal on the same carrier frequency. DRM is digital
only... if you want analog, you have to have a separate channel, close to or
not to the DRM one.

[Don Pearce]

On Sat, 13 Oct 2007 10:05:11 -0700, "David Eduardo"
wrote:


"SFTV_troy" wrote in message
ups.com...

RHF wrote:
On Oct 12, 8:52 am, SFTV_troy wrote:
RHF wrote:
On Oct 11, 5:48 am, SFTV_troy

- There's no real difference between DRM's version
- (sitting next-to the AM signal) and HD's version
- (also sitting next-to the AM signal).

IBOC AM/MW "HD" Radio - Hybrid Mode
http://www.dallas.net/~jvpoll/rfi/AM...BOC_Mask10.gif
- Lower Digital Sidebands {Co-SideBand}
* Analog Host Signal (Mono) {Nested}
+ Upper Digital Sidebands {Co-SideBand}

- Thanks for proving my point. HD sits *next to* the AM signal (+/-

- 10 kHz). Same as DRM sits *next to* the AM signal (+/- 10 kHz).



DRM = Simulcast without Specification {Sans-Mask}
x x x Does Not Equal x x x
IBOC = Intrinsic {Mask} : Nested Analog + Two Digital Co-Sidebands



I still don't see the difference. Both standards are using sidebands,
adjacent to the analog AM signal.

DRM is not using a sideband; to do analog and digital requires a separate
transmitter for each on a separate carrier frequency. HD is a combined
analog and digital signal on the same carrier frequency. DRM is digital
only... if you want analog, you have to have a separate channel, close to or
not to the DRM one.


Exactly. DRM is a separate signal that can go wherever the operator
chooses. He may elect to place it next to his AM transmitter or the
regulator may force him to place it there so any interference will be
to his own service. Whatever, the signal will appear at only one point
in the spectrum. It is not a sideband of the AM.

HD, on the other hand is an actual sideband of the AM carrier. There
are two digital channels available, the primary and the secondary.
Each of them occupies 5kHz either side of the AM carrier, the primary
from 10 to 15kHz, and the secondary from 5 to 10kHz. The HD signal is
irrevocably combined with its host AM service.

d

--
Pearce Consulting
http://www.pearce.uk.com

[dxAce]

David Eduardo wrote:

"SFTV_troy" wrote in message
ps.com...

RHF wrote:
On Oct 12, 8:52 am, SFTV_troy wrote:
RHF wrote:
On Oct 11, 5:48 am, SFTV_troy

- There's no real difference between DRM's version
- (sitting next-to the AM signal) and HD's version
- (also sitting next-to the AM signal).

IBOC AM/MW "HD" Radio - Hybrid Mode
http://www.dallas.net/~jvpoll/rfi/AM...BOC_Mask10.gif
- Lower Digital Sidebands {Co-SideBand}
* Analog Host Signal (Mono) {Nested}
+ Upper Digital Sidebands {Co-SideBand}

- Thanks for proving my point. HD sits *next to* the AM signal (+/-

- 10 kHz). Same as DRM sits *next to* the AM signal (+/- 10 kHz).



DRM = Simulcast without Specification {Sans-Mask}
x x x Does Not Equal x x x
IBOC = Intrinsic {Mask} : Nested Analog + Two Digital Co-Sidebands



I still don't see the difference. Both standards are using sidebands,
adjacent to the analog AM signal.

DRM is not using a sideband; to do analog and digital requires a separate
transmitter for each on a separate carrier frequency. HD is a combined
analog and digital signal on the same carrier frequency. DRM is digital
only... if you want analog, you have to have a separate channel, close to or
not to the DRM one.

Both = QRM

dxAce
Michigan
USA

[Telamon]

In article om,
SFTV_troy wrote:

RHF wrote:
On Oct 12, 8:52 am, SFTV_troy wrote:
RHF wrote:
On Oct 11, 5:48 am, SFTV_troy

- There's no real difference between DRM's version
- (sitting next-to the AM signal) and HD's version
- (also sitting next-to the AM signal).

IBOC AM/MW "HD" Radio - Hybrid Mode
http://www.dallas.net/~jvpoll/rfi/AM...BOC_Mask10.gif
- Lower Digital Sidebands {Co-SideBand}
* Analog Host Signal (Mono) {Nested}
+ Upper Digital Sidebands {Co-SideBand}

- Thanks for proving my point. HD sits *next to* the AM signal (+/-

- 10 kHz). Same as DRM sits *next to* the AM signal (+/- 10 kHz).



DRM = Simulcast without Specification {Sans-Mask}
x x x Does Not Equal x x x
IBOC = Intrinsic {Mask} : Nested Analog + Two Digital Co-Sidebands



I still don't see the difference. Both standards are using sidebands,
adjacent to the analog AM signal.

Ok, here is a difference you should understand. DRM uses two separate
transmitters and antennas one digital and one analog. HD uses two
different exciters one digital and the other analog that input into the
same transmitter and antenna at the same time.

--
Telamon
Ventura, California

[RHF]

On Oct 13, 9:13 am, SFTV_troy wrote:
RHF wrote:
On Oct 12, 8:52 am, SFTV_troy wrote:
RHF wrote:
On Oct 11, 5:48 am, SFTV_troy

- There's no real difference between DRM's version
- (sitting next-to the AM signal) and HD's version
- (also sitting next-to the AM signal).

IBOC AM/MW "HD" Radio - Hybrid Mode
http://www.dallas.net/~jvpoll/rfi/AM...BOC_Mask10.gif
- Lower Digital Sidebands {Co-SideBand}
* Analog Host Signal (Mono) {Nested}
+ Upper Digital Sidebands {Co-SideBand}

- Thanks for proving my point. HD sits *next to* the AM signal (+/-

- 10 kHz). Same as DRM sits *next to* the AM signal (+/- 10 kHz).

DRM = Simulcast without Specification {Sans-Mask}
x x x Does Not Equal x x x
IBOC = Intrinsic {Mask} : Nested Analog + Two Digital Co-Sidebands

I still don't see the difference. Both standards are using sidebands,
adjacent to the analog AM signal.- Hide quoted text -

- Show quoted text -

SFTV - There you go again one more time being Factually Wrong
-and- Clearly Misstating the Technical Specifications.

DRM = Simulcast without Specification {Sans-Mask}
-Note- That is Two 'separate' Signals -NOT- Sidebands
x x x Does Not Equal x x x
IBOC = Intrinsic {Mask} : Nested Analog + Two Digital Co-Sidebands
http://electronicdesign.com/Files/29.../Figure_02.gif


i b oc'd ~ RHF

[RHF]

On Oct 13, 9:13 am, SFTV_troy wrote:
RHF wrote:
On Oct 12, 8:52 am, SFTV_troy wrote:
RHF wrote:
On Oct 11, 5:48 am, SFTV_troy

- There's no real difference between DRM's version
- (sitting next-to the AM signal) and HD's version
- (also sitting next-to the AM signal).

IBOC AM/MW "HD" Radio - Hybrid Mode
http://www.dallas.net/~jvpoll/rfi/AM...BOC_Mask10.gif
- Lower Digital Sidebands {Co-SideBand}
* Analog Host Signal (Mono) {Nested}
+ Upper Digital Sidebands {Co-SideBand}

- Thanks for proving my point. HD sits *next to* the AM signal (+/-

- 10 kHz). Same as DRM sits *next to* the AM signal (+/- 10 kHz).

DRM = Simulcast without Specification {Sans-Mask}
x x x Does Not Equal x x x
IBOC = Intrinsic {Mask} : Nested Analog + Two Digital Co-Sidebands


= I still don't see the difference. Both standards are using
sidebands,
= adjacent to the analog AM signal.

SFTV - There you go again one more time being Factually Wrong
-and- Clearly Misstating the Technical Specifications.

DRM = Simulcast without Specification {Sans-Mask}
-Note- That is Two 'separate' Signals -NOT- Sidebands
x x x Does Not Equal x x x
IBOC = Intrinsic {Mask} : Nested Analog + Two Digital Co-Sidebands
http://electronicdesign.com/Files/29.../Figure_02.gif


i b oc'd ~ RHF

[SFTV_troy]

Don Pearce wrote:
On Sat, 13 Oct 2007 10:05:11 -0700, "David Eduardo"
"SFTV_troy"


I still don't see the difference. Both standards are using
sidebands, adjacent to the analog AM signal.

DRM is not using a sideband; to do analog and digital requires a separate
transmitter for each on a separate carrier frequency. HD is a combined
analog and digital signal on the same carrier frequency. DRM is digital
only... if you want analog, you have to have a separate channel, close to or
not to the DRM one.


Exactly. DRM is a separate signal that can go wherever the operator
chooses. ..... It is not a sideband of the AM.
HD, on the other hand is an actual sideband of the AM carrier.




I see your point, but that seems a trivial difference. Especially
since HD also uses a separate signal (exciter), separate from the
analog signal. "As with AM, FM stations may use separate exciters to
modulate the very different signals." - wikipedia.

Sounds like simulcast of two signals.

Not just one.

[SFTV_troy]

On Oct 13, 2:50 pm, Telamon
wrote:

Ok, here is a difference you should understand. DRM uses two separate
transmitters and antennas one digital and one analog. HD uses two
different exciters one digital and the other analog that input into the
same transmitter and antenna at the same time.



Why does DRM have to use two separate antennas? Why can't DRM use a
combiner and output both signals through a single antenna?

[Don Pearce]

On Mon, 15 Oct 2007 07:20:19 -0700, SFTV_troy
wrote:


Don Pearce wrote:
On Sat, 13 Oct 2007 10:05:11 -0700, "David Eduardo"
"SFTV_troy"


I still don't see the difference. Both standards are using
sidebands, adjacent to the analog AM signal.

DRM is not using a sideband; to do analog and digital requires a separate
transmitter for each on a separate carrier frequency. HD is a combined
analog and digital signal on the same carrier frequency. DRM is digital
only... if you want analog, you have to have a separate channel, close to or
not to the DRM one.


Exactly. DRM is a separate signal that can go wherever the operator
chooses. ..... It is not a sideband of the AM.
HD, on the other hand is an actual sideband of the AM carrier.




I see your point, but that seems a trivial difference. Especially
since HD also uses a separate signal (exciter), separate from the
analog signal. "As with AM, FM stations may use separate exciters to
modulate the very different signals." - wikipedia.

Sounds like simulcast of two signals.

Not just one.

An exciter is simply a source of a signal which can be modulated onto
a carrier.

If you want an analogy, HD is a little like the stereo subcarrier on
an FM signal - not the same as the baseband signal, but an integral
part of the overall signal. DRM would be like transmitting the stereo
signal on another channel entirely, with its own transmitter.

The difference is far from trivial.

d

--
Pearce Consulting
http://www.pearce.uk.com

[David Eduardo]

"SFTV_troy" wrote in message
ups.com...

Don Pearce wrote:
On Sat, 13 Oct 2007 10:05:11 -0700, "David Eduardo"
"SFTV_troy"


I still don't see the difference. Both standards are using
sidebands, adjacent to the analog AM signal.

DRM is not using a sideband; to do analog and digital requires a
separate
transmitter for each on a separate carrier frequency. HD is a combined
analog and digital signal on the same carrier frequency. DRM is digital
only... if you want analog, you have to have a separate channel, close
to or
not to the DRM one.


Exactly. DRM is a separate signal that can go wherever the operator
chooses. ..... It is not a sideband of the AM.
HD, on the other hand is an actual sideband of the AM carrier.




I see your point, but that seems a trivial difference. Especially
since HD also uses a separate signal (exciter), separate from the
analog signal. "As with AM, FM stations may use separate exciters to
modulate the very different signals." - wikipedia.

On the same carrier for HD, on separate carriers for DRM. DRM is a pure
digital system, and if analog is also employed, it is on a separate
allocation, close or not so close to the digital frequency.

[David Eduardo]

"SFTV_troy" wrote in message
oups.com...
On Oct 13, 2:50 pm, Telamon
wrote:

Ok, here is a difference you should understand. DRM uses two separate
transmitters and antennas one digital and one analog. HD uses two
different exciters one digital and the other analog that input into the
same transmitter and antenna at the same time.



Why does DRM have to use two separate antennas? Why can't DRM use a
combiner and output both signals through a single antenna?

Because the carrier frequencies are different... and because there is no
analog component to DRM... to do analog requires a separate station,
license, frequency.

[Frank Dresser]

"SFTV_troy" wrote in message
ups.com...

Don Pearce wrote:
On Sat, 13 Oct 2007 10:05:11 -0700, "David Eduardo"
"SFTV_troy"


I still don't see the difference. Both standards are using
sidebands, adjacent to the analog AM signal.

DRM is not using a sideband; to do analog and digital requires a
separate
transmitter for each on a separate carrier frequency. HD is a combined
analog and digital signal on the same carrier frequency. DRM is digital
only... if you want analog, you have to have a separate channel, close
to or
not to the DRM one.


Exactly. DRM is a separate signal that can go wherever the operator
chooses. ..... It is not a sideband of the AM.
HD, on the other hand is an actual sideband of the AM carrier.




I see your point, but that seems a trivial difference. Especially
since HD also uses a separate signal (exciter), separate from the
analog signal. "As with AM, FM stations may use separate exciters to
modulate the very different signals." - wikipedia.

Sounds like simulcast of two signals.

Not just one.

[Frank Dresser]

"SFTV_troy" wrote in message
ups.com...



I see your point, but that seems a trivial difference. Especially
since HD also uses a separate signal (exciter), separate from the
analog signal. "As with AM, FM stations may use separate exciters to
modulate the very different signals." - wikipedia.

Sounds like simulcast of two signals.

Not just one.



IBOC was engineered from the get-go with compatible recievers in mind. The
receivers would autoswitch from the analog to the digital signal.

Was DRM engineered with such autoswitching receivers in mind?

Are any such autoswitching receivers currently available?

Frank Dresser

[dxAce]

David Frackelton Gleason, still posing as the fraudulent 'Eduardo', wrote:

"SFTV_troy" wrote in message
oups.com...
On Oct 13, 2:50 pm, Telamon
wrote:

Ok, here is a difference you should understand. DRM uses two separate
transmitters and antennas one digital and one analog. HD uses two
different exciters one digital and the other analog that input into the
same transmitter and antenna at the same time.



Why does DRM have to use two separate antennas? Why can't DRM use a
combiner and output both signals through a single antenna?

Because the carrier frequencies are different... and because there is no
analog component to DRM... to do analog requires a separate station,
license, frequency.

License? Apparently you didn't need one for amateur radio in Ecuador, Edweenie!

[Telamon]

In article .com,
SFTV_troy wrote:

On Oct 13, 2:50 pm, Telamon
wrote:

Ok, here is a difference you should understand. DRM uses two separate
transmitters and antennas one digital and one analog. HD uses two
different exciters one digital and the other analog that input into the
same transmitter and antenna at the same time.



Why does DRM have to use two separate antennas? Why can't DRM use a
combiner and output both signals through a single antenna?

Because it's different. Try to process that.

--
Telamon
Ventura, California

[Hein ten Horn]

Frank Dresser wrote:

IBOC was engineered from the get-go with compatible recievers in mind.
The receivers would autoswitch from the analog to the digital signal.
Was DRM engineered with such autoswitching receivers in mind?

Obviously a DRM receiver can handle both analogue and
digital signals.
Once a DRM signal is received, all parallel frequencies of
the service are automatically stored in the receiver's memory.
If the signal becomes weak the receiver will automatically switch
to a better signal (if available), even in other bands.
With a small amount of digital information added to an existing
analogue AM broadcast (AMSS, AM Signalling System) the
receiver recognizes the alternative frequency information and
schedules for other DRM, DAB, AM and FM transmissions
carrying the same or related programme material.
When you tune in to an analoque AM transmission on 630 kHz
in the medium wave band the receiver could let you listening to
for instance a DRM broadcast on 9740 kHz on short wave.

Are any such autoswitching receivers currently available?

Himalaya DRM2009
http://www.himalaya.com.hk/index.php... d=28&lang=en

Morphy Richards DRM Radio
http://www.morphyrichards.co.uk/inde...SR03&ORLID=ENG

Both receivers are equipped with the modern RadioScape
RS500 module.

gr, Hein

[Frank Dresser]

"Hein ten Horn" wrote in message
...
Frank Dresser wrote:

IBOC was engineered from the get-go with compatible recievers in mind.
The receivers would autoswitch from the analog to the digital signal.
Was DRM engineered with such autoswitching receivers in mind?

Obviously a DRM receiver can handle both analogue and
digital signals.
Once a DRM signal is received, all parallel frequencies of
the service are automatically stored in the receiver's memory.
If the signal becomes weak the receiver will automatically switch
to a better signal (if available), even in other bands.
With a small amount of digital information added to an existing
analogue AM broadcast (AMSS, AM Signalling System) the
receiver recognizes the alternative frequency information and
schedules for other DRM, DAB, AM and FM transmissions
carrying the same or related programme material.
When you tune in to an analoque AM transmission on 630 kHz
in the medium wave band the receiver could let you listening to
for instance a DRM broadcast on 9740 kHz on short wave.


That's interesting, and I can imagine that approach working well. There
would be no need for the adjacent channel digital interference which is
designed into IBOC.

So it looks like DRM can be better than IBOC.



Are any such autoswitching receivers currently available?

Himalaya DRM2009

http://www.himalaya.com.hk/index.php... d=28&lang=en

Morphy Richards DRM Radio

http://www.morphyrichards.co.uk/inde...SR03&ORLID=ENG

Both receivers are equipped with the modern RadioScape
RS500 module.

gr, Hein


Thanks for the info!

Frank Dresser

[IBOCcrock]

On Oct 13, 12:13 pm, SFTV_troy wrote:
RHF wrote:
On Oct 12, 8:52 am, SFTV_troy wrote:
RHF wrote:
On Oct 11, 5:48 am, SFTV_troy

- There's no real difference between DRM's version
- (sitting next-to the AM signal) and HD's version
- (also sitting next-to the AM signal).

IBOC AM/MW "HD" Radio - Hybrid Mode
http://www.dallas.net/~jvpoll/rfi/AM...BOC_Mask10.gif
- Lower Digital Sidebands {Co-SideBand}
* Analog Host Signal (Mono) {Nested}
+ Upper Digital Sidebands {Co-SideBand}

- Thanks for proving my point. HD sits *next to* the AM signal (+/-

- 10 kHz). Same as DRM sits *next to* the AM signal (+/- 10 kHz).

DRM = Simulcast without Specification {Sans-Mask}
x x x Does Not Equal x x x
IBOC = Intrinsic {Mask} : Nested Analog + Two Digital Co-Sidebands

I still don't see the difference. Both standards are using sidebands,
adjacent to the analog AM signal.- Hide quoted text -

- Show quoted text -

Hey - you homo butt-****er! You disgust me, gay boy!

[RHF]

On Oct 18, 7:52 am, IBOCcrock wrote:
On Oct 13, 12:13 pm, SFTV_troy wrote:





RHF wrote:
On Oct 12, 8:52 am, SFTV_troy wrote:
RHF wrote:
On Oct 11, 5:48 am, SFTV_troy

- There's no real difference between DRM's version
- (sitting next-to the AM signal) and HD's version
- (also sitting next-to the AM signal).

IBOC AM/MW "HD" Radio - Hybrid Mode
http://www.dallas.net/~jvpoll/rfi/AM...BOC_Mask10.gif
- Lower Digital Sidebands {Co-SideBand}
* Analog Host Signal (Mono) {Nested}
+ Upper Digital Sidebands {Co-SideBand}

- Thanks for proving my point. HD sits *next to* the AM signal (+/-

- 10 kHz). Same as DRM sits *next to* the AM signal (+/- 10 kHz).

DRM = Simulcast without Specification {Sans-Mask}
x x x Does Not Equal x x x
IBOC = Intrinsic {Mask} : Nested Analog + Two Digital Co-Sidebands


- - I still don't see the difference.
- - Both standards are using sidebands,
- - adjacent to the analog AM signal.

- Hey - you homo butt-****er!
- You disgust me, gay boy!

IBOC Crock,

You sure do read a lot of weirdness
into other people's on-topic posts.

please do not post your 'closet' sexual fantasies
to this shortwave radio listener's newsgroup ~ RHF