Thread: SSB in DX-398
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Old January 26th 05, 04:16 AM
Michael Black
 
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"CW" ) writes:
Nothing weird about it. Just like any other radio signal, you have to tune
the radio correctly.

But when people don't understand SSB, of course it's "weird".

Tune a regular AM signal, and the carrier ensures that it is always tuned
properly. The only thing the tuning does is move the signal into
the passband of the IF filter. Mistune it, and you get reduced amplitude,
and altered frequency response.

With an SSB signal, mistuning likewise moves the signal out of the passband.
But it also has to be tuned properly in relationship to the "reinserted
carrier", ie the BFO, and if that isn't right, then you will be translating
the modulation to the wrong place in the audio spectrum. Voice can be
ambiguous, since you often won't know how someone sounds (because you
don't know their voice), so mistuning can merely make someone sound squeaky,
or even sound right even if not exactly as the person sounds in real life.
Music is absolute tones, and if you don't tuen that right, not only will
you not hear the proper notes, but the relationship of the notes to each
other is off. You know what a given note sounds like, and not much mistuning
messes things up.

Michael

"Scott A." wrote in message
...
It's kinda weird how you can change the pitch of the
voice or music by changing the tuning.