Quote:
Originally Posted by Clark2
Don't the HD sidebands actually overlap the bandwidth of an adjacent channel? Is it possible to overcome that even with a narrow IF? -- Clark2
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Correct - the sidebands of first adjacent HD channels can become 'on channel' interference. Which is why it is so important to understand your local listening conditions. If you have any first adjacent channel issues then the problem is really hard to fix because of the on channel interference.
Narrow IF's help here, as does a directional antenna used to put the offending station in a null.
The easiest test to see if you have HD self noise is to switch your tuner to mono. If the noise goes away in mono, you have HD self noise or the signal you are receiving is not full quieting in stereo anyway. You need about 20 dB more signal strength to get full quieting in stereo vs mono. That's exclusive of HD self noise.
Tom
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