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