Thanks Alberto,
I was able to find a good signal that allowed me to properly null the
image in SDRadio. Very fine software, I look forward to it's futher
development.
Chris N7UJU
--- In softrock40@..., Alberto I2PHD <i2phd@w...> wrote:
fargonaz wrote:
I did try to null in SDRadio but as you found, it didn't have much if
any effect.
First minimize the image response using the phase controls, then
slowly
move the amplitude slider to refine the rejection. Possibly you will
have
to retouch the fine phase slider, then again the amplitude.
With a careful adjustment, it is possible to go down up to 70+ dB of
rejection of the unwanted sideband.
Of course, both the phase and the amplitude controls act only on a small
adjustment range, the implication being that the hardware is already
almost
balanced, needing just a final touch up. If the hardware is grossly
unbalanced,
the range of the amplitude control may be not large enough to
rebalance it.
73 Alberto I2PHD
