I should have said that the image would appear at 7.070, not 7.060-
sorry. -Bruce.
--- In softrock40@..., "Bruce Beford"
<bruce.beford@v...> wrote:
Eric- I think you may be confused regarding image rejection. What
is
meant is when you inject a signal at say, 7.042, which is about
14Khz BELOW the center freq of 7.056- The image that you are
trying
to null will appear at about 7.060, or about 14Khz ABOVE the
center
freq. The nulling process will not have any effect on the junk
around 7.056. My understanding is that the stuff you see there are
artifacts created by very low frequency noise within the the sound
card, as well as other factors relating to this low-cost design. A
high-end sound card may reduce this, but I would like to hear from
others using the SR40 with something like the M-Audio delta 44, or
other high-end cards. Hope this explaination helps.
73, Bruce N1RX
