= = = 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

..