On 5/4/2010 8:34 PM, Garey Barrell wrote:
One thing I would add. BEFORE using the "software" Image Rejection,
Fine Tune the GAIN balance by adjusting the Left Channel control for
best suppression.
Someone else, somewhere, suggested leaving the LEFT GAIN at minimum with
the RIGHT GAIN at 10 o'clock. I believe the GAIN controls must be
turned up somewhat, otherwise the S/N ratio will be degraded.
So it might take some playing with the GAIN controls to get the best s/n
ratio, AND "equal" gain through both channels.
Garey,
correct, it is best to try to achieve the best balance (read : image
suppression) acting on the hardware (Tayloe mixer, post amplifiers and
sound adapter controls)
with the software adjustments still at zero.
Only when you are not able to balance it better, then use what the
software offers you to fine tune that balance.
Regarding the Gain controls, remember that, as written in the
documentation of the sound adapter, those controls adjust the
"additional" gain given to each channel...
They must not be regarded as a conventional volume control, where the
zero position means that no gain is applied.... in the E-MU 0202 each
channel has a base gain, which is not
that low, that can increased, if need be, using the controls on the
front of the adapter. So leaving the right channel gain at zero does not
incur in a bad S/N ratio.
The two channels are slightly different from each other, as one is meant
also for the microphone, while the other isn't. That's why it is
advisable to increase slightly from the zero
position the left channel "additional" gain. It is too easy to wrongly
adjust them so to incur in a bad saturation situation.... I know... by
experience.... :-(
73 Alberto I2PHD
