--- In [email protected], "Janne Pulkkinen" <[EMAIL PROTECTED]> wrote: > > In Winrad, I still have to have the phase slider set to max value > and the delay tag pressed to get even this image rejection. Is this > the fault of the soundcard? > I would say that probably the culprit is the QSD, rather than the sound card. With Winrad, being careful in tweaking the Fine controls, I have been able to reach even 110dB of attenuation of the image. But when you are at this level, just blow on your QSD hardware, and you will see that value deteriorate up to 80dB or even worse... and, in addition, 110dB are obtained just at a single point of the range. From tests I have performed, with a calibration about at mid scale, what you can obtain is a rejection that goes up to about 50dB at the two scale ends. This is a value that many could consider acceptable. But of course you must start first with a hardware that is reasonably balanced by itself.
73 Alberto I2PHD
