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Re: [Discuss-gnuradio] Mux settings...
From: |
Eric Blossom |
Subject: |
Re: [Discuss-gnuradio] Mux settings... |
Date: |
Mon, 22 Oct 2007 18:52:30 -0700 |
User-agent: |
Mutt/1.5.9i |
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