On Tue, Aug 23, 2005 at 01:44:28PM -0400, Krzysztof Kamieniecki wrote:
> Quoting Eric Blossom <[EMAIL PROTECTED]>:
>
> > This used to be true. A while ago we added a method to set the ddc
> > phase, and the library code resets it to zero when the device is
> > opened.
> >
> > from usrp_standard.
Quoting Eric Blossom <[EMAIL PROTECTED]>:
> This used to be true. A while ago we added a method to set the ddc
> phase, and the library code resets it to zero when the device is
> opened.
>
> from usrp_standard.h:
>
> /*!
>* \brief Set the digital down converter phase register.
>*
>
At 12:02 PM 8/23/2005 -0400, you wrote:
Quoting Martin Dvh <[EMAIL PROTECTED]>:
>
> ADC.imag=0 ==>
> out.real=ADC.real*NCO.real
> out.imag=ADC.real*NCO.imag
>
And NCO.imag is only zero if the NCO frequency has not been changed from zero
since USRP powerup.
Ok, that's makes perfect sense - so
On Tue, Aug 23, 2005 at 12:02:43PM -0400, Krzysztof Kamieniecki wrote:
> Quoting Martin Dvh <[EMAIL PROTECTED]>:
>
> > cswiger wrote:
> > > One thing I don't understand tho: if a typical mux of
> > > 0xF0F0F0F0 feeds zeros to all DDC Q inputs, and ADC 0
> > > to all DDC I inputs, nchannels = 1 sen
Quoting Martin Dvh <[EMAIL PROTECTED]>:
> cswiger wrote:
> > One thing I don't understand tho: if a typical mux of
> > 0xF0F0F0F0 feeds zeros to all DDC Q inputs, and ADC 0
> > to all DDC I inputs, nchannels = 1 sends data from DDC 0
> > only, and looking at the DDC block diagram in figure 3 at:
>
cswiger wrote:
One thing I don't understand tho: if a typical mux of
0xF0F0F0F0 feeds zeros to all DDC Q inputs, and ADC 0
to all DDC I inputs, nchannels = 1 sends data from DDC 0
only, and looking at the DDC block diagram in figure 3 at:
http://www.gnu.org/software/gnuradio/doc/exploring-gnurad
Gang - I'm going back and reviewing the complete signal
path from sma socket to speakers, using mux info in
usrp_standard.h, Achilleas' *.ps diagrams, etc.
One thing I don't understand tho: if a typical mux of
0xF0F0F0F0 feeds zeros to all DDC Q inputs, and ADC 0
to all DDC I inputs, nchannels = 1
