Frank Dresser wrote:
It's just a noise rush, but not white exactly. The giveaway is that
it's on
only one sideband of the station you're trying to hear. If you hear
it on the
LSB, the offending IBOC station is 10 kHz higher (not lower as you'd
expect);
and if on USB, then 10 kHz lower.

I'm not sure I understand. The spectrum plot shows two symmetrical
peaks off the carrier frequency. The noise I observed was consistant
with that.

It's not symmetric around the adjacent channel station being interfered with.

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.
--
Ron Hardin


On the internet, nobody knows you're a jerk.

"Ron Hardin" wrote in message
...

It's not symmetric around the adjacent channel station being
interfered with.


OK. The noise was symmetrical around 720, and I was trying to catch
710.


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.
--
Ron Hardin



I live a few miles from WGN's transmitter, and the normal sideband
splatter makes WOR almost unlistenable. I was just curious about
propagation that night. A station ID was all I wanted. If I ever hear
the noise again, I'll listen to it more carefully.

Frank Dresser

= = = Ron Hardin
= = = wrote in message ...
Frank Dresser wrote:
It's just a noise rush, but not white exactly. The giveaway is that
it's on
only one sideband of the station you're trying to hear. If you hear
it on the
LSB, the offending IBOC station is 10 kHz higher (not lower as you'd
expect);
and if on USB, then 10 kHz lower.

I'm not sure I understand. The spectrum plot shows two symmetrical
peaks off the carrier frequency. The noise I observed was consistant
with that.

It's not symmetric around the adjacent channel station being interfered with.

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

..

Holy crap, look at those spurs +/- 15kc!

Oh, yeah, IBAC (In Band Adjacent Channel) is
going to save AM!

73,

Steve Lawrence
Burnsville, MN

"David" wrote in message
news | Thanks to Bob Gonsett
|
| http://earthsignals.com/add_CGC/KMXE.PDF


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