On Apr 17, 2006, at 11:31 PM, Tom Hammond wrote:
If the shapes of the LSB and USB filters are NOT opposite of each
other, the implication is that BOTH are on the SAME SIDEBAND,
rather than being on OPPOSITE sidebands.
This occurred to me, but since the BFO frequencies he listed seemed
right, this didn't seem possible. That's why I thought there was some
sort of other high-frequency attenuation going one. Ron hit it on the
head - the caps across the headphone jack cause this rolloff.
This can be confirmed by comparing either the DAC counts or the
FREQUENCIES of the BFO. If both sets of values (DAC _or_ FREQ) are
on the SAME side of the filter center frequency, then they're both
on the same sideband, though possibly not on the same exact frequency.
Yup. Made that mistake once myself.
Bill Coleman, AA4LR, PP-ASEL Mail: [EMAIL PROTECTED]
Quote: "Not within a thousand years will man ever fly!"
-- Wilbur Wright, 1901
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