Re: [Discuss-gnuradio] Disabling the USRP FPGA HBF

[Eric Blossom]

On Thu, May 17, 2007 at 08:18:13AM -0700, Eng. Firas wrote:
> 
> Dear Matt,
> Dear Eric,
> 
> Is there away to disable (or bypass) the USRP FPGA DDC half band filter? I
> want to get the samples directly from the CIC decimation filter and do the
> low pass filtering by software. I developed a MATLAB based professional
> 100KHz bandwidth digital down converter as shown in the attached m file. I
> want to test this design in USRP. In the mean time, I cannot do this because
> I don't have access to the CIC output samples because of the HBF. 
> Waiting for your help, thank you.
> 
> 
> Firas.
> 
> http://www.nabble.com/file/8491/testddc100k.m testddc100k.m 

If receive only is OK, you can use the 4rx_0tx.rbf fpga configuration.

  u = usrp.source_c(0, fpga_filename="std_4rx_0tx.rbf")

Eric