"Frank Dresser" wrote in message ...
"RHF" wrote in message
om...
If IBOC is on 700 and you're listening to 710, the the IBOC noise is
at 713,
which is the upper sideband of 710. If you listen to 710 LSB, the
noise
disappears.
.
RH,
I thought that basic AM and SSB technology were different from IBOC
Digital Technology.
A 13kHz IBOC (@713kHz) off-set from 700kHz is NOT a 3kHz SSB
(@713kHz) off-set from 710kHz.
IBOC and SSB are not produced in the same manner and do not decipher
in the same manner.
Please Correct Me - If I Am Wrong ?
~ RHF
.
I don't think Ron's is using SSB in the sense of a modulation method,
but rather as a reception method. There's a couple of troughs in the
spectrum plot in the splits between the main analog channel and the
digital sidebands. One sideband of each adjacent channel will be in
those troughs.
http://earthsignals.com/add_CGC/KMXE.PDF
Listening SSB mode will limit the interference. Unfortunately, the
sideband with the least amount of interference will be the sideband
closest to the carrier of the unwanted station. Normally, it would be
preferable to listen to the sideband farthest away from the carrier of
the unwanted station.
I was able to tune in an actual IBOC transmission on WSAI 1530 kHz,
yesterday evening. WSAI is strong here, but I've never tuned them in
before they turned off their IBOC noisemaker. I was also able to tune
in KXEL 1540kHz inbetween WSAI's main channel and their upper IBOC
noiseband. There was splatter from the main channel and noise from the
digital channel, but it was readable. I don't have the selectivity to
listen in true sideband mode, but I think even that wouldn't totally
eliminate the interference. If the IBOC station is local, I think there
would still enough noise and splatter to overwhelm an otherwise
listenable near adjacent channel.
The current split digital/analog system is intended to be temporary.
The IBOC standard is designed to go full digital.
Frank Dresser
..
FD,
If the IBOC Signal is a 'broadcast' as "Digital Encoded Algorithm".
Either as Dual IBOC Signals (Stereo) or as 'separate' Voice
and Data/Information Channels.
Then, how do you 'decode' it and Listen to it simply using
standard "Analog" SSB ?
~ RHF
..