[Premium-Rx] Cubic CDR-3280 Digital I + Q output

[Alberto di Bene]

On 1/18/2011 9:04 AM, Paolo Mantovani <pmthome at gmail.com>  wrote:
> My 2 cents: SDR receivers (e.g. Softrock) I and Q output is analog. It goes
> to the PC soundcard, where at first it gets sampled. At this point you have
> a digital I/Q stream. Then it enters a DSP for filtering/demodulation. All
> this happens in the soundcard board.
This is wrong.  The sound card is used only for the digitization process.  All of the DSP
processing is done on the PC processor (Pentium or Athlon). No processing is done on
the sound card, apart from converting the signal from analog to digital.

73  Alberto  I2PHD