py2wm wrote:
> Hi Alberto,
>
> In SDRadio and Winradio, to what extent does the "channel skew"
> amplitude adjustment allow for amplitude unbalance?
>
> I intend to do a Monte Carlo evaluation of a QSD/audio pre-amplifier
> to discover the maximum tolerance of components which could be
> balanced out by the software correcting tool.
>
> 73,
>
> João De Marco, PY2WM
João,
the adjustment range in SDRadio is rather limited, as I didn't foresee a
great imbalance in amplitude. Maybe I was
wrong, but currently one of the two channels has an amplitude multiplier that
can range from 0.95 to 1.05 when you
change the slider position in the skew adjustment panel. The tests I did with
my homebrew hardware indicated that this
range was plenty enough, but some Softrock users have reported that a greater
range maybe would be more indicated. One
thing to be careful about : the Windows mixer panel for the sound card has
small horizontal sliders for left/right
balancing. Please make sure that they are exactly in the middle position,
otherwise they will introduce an error greater
than what my routine is capable to fix...
73 Alberto I2PHD
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