Thanks Alberto; One more question regarding the same subject. Is amplitude and phase adjustments a fixed increment throughout the whole sampling width? (48 kHz in my case with a Live! sound card).
I've seen Rocky to build a table of corrections, which is presented in a plot form. My concern relates to the QSD amplitude and phase frequency dependence, in my case phase ramps 4º linearly across the bandwidth and amplitude from 1.03 to a 1.02 ratio. 73, João De Marco, PY2WM --- In [email protected], Alberto I2PHD <[EMAIL PROTECTED]> wrote: > > 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 > Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/soft_radio/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
