Re: [Discuss-gnuradio] Mux settings...

[Eric Blossom]

On Mon, Oct 22, 2007 at 05:59:58PM -0700, Hans Glitsch wrote:
> Hello,
> 
> I may be having similar problems.  I'm using 2 basic RX boards and I want 
> to receive four complex signals.  I seem to be losing the complex part of 
> the first signal.  I was using a mux of 0xf3f2f1f0, and after seeing your 
> message, I tried 0x32103210.  Both of them show the same problem with the 
> first signal.
> 
> I have tried swapping the usrp parts to see if it was a hardware problem, 
> but the problem persists.
> 
> Thanks for your help,
> Hans

For the Basic Rx, 0xf3f2f1f0 is the correct setting to feed 4 separate
signals into the I inputs of 4 DDCs, with zeros fed to the Q inputs.

To use 4 channels, you must use the std_4rx_0tx.rbf fpga image.
If you use the std_4rx_0tx.rbf image, the decimation rate must be <= 128.
If you need more decimation, you must do it in software.

Eric