Hi Amit We have also identified a bug in the pfb_fir_generic block and are working on debugging it. Will let you know when we have a solution. Sorry for the inconvenience.
Regards Andrew On Thu, Jan 21, 2016 at 11:18 AM, Amit Bansod <aban...@mpifr-bonn.mpg.de> wrote: > Hi Jack, > > I finally got hold of this issue. > > The problem was in the pfb_fir_generic block. After replacing it, the > fft output was as expected. > > > Cheers, > Amit > > On 06-Nov-15 5:04 PM, Jack Hickish wrote: > > Hi Amit, > > > > I've hastily fixed that error regarding bram latency -- it's pushed to > > the master casper branch at > https://github.com/casper-astro/mlib_devel.git > > > > You should be able to cherry pick that commit into your repository, but > > I recommend just using the casper-astro master branch rather than the > > SMA branch you're currently working with. The SMA code was merged into > > casper-astro more recently than the commit you are currently at anyway. > > > > As for your spectra, I'd suggest seeing if the problem persists with the > > latest casper-astro master branch and then investigating further from > there. > > > > Cheers, > > Jack > > > > > > On Fri, 6 Nov 2015 at 11:14 Amit Bansod <aban...@mpifr-bonn.mpg.de > > <mailto:aban...@mpifr-bonn.mpg.de>> wrote: > > > > Dear All, > > > > I am trying to extract 1 channel/band using PFB/FFT (pfb_fir_generic > & > > fft_wideband_real blocks from casper library) and I am getting > > inconsistent result from a 64 channel PFB/FFT. > > > > I also found that the for 64 channel FFT, the fft_wideband_real block > > breaks at > fft_wideband_real/fft_biplex_real_4x/bi_real_unscr_4x/delay0 > > (or ../bi_real_unscr_4x/delay1) for BRAM latency > 2. Can this be > also a > > cause for concern ? > > > > I have enclosed the plots of the same band for the 64 & 128 channel > > FFTs. The BW of 1 band is 12.5 MHz for 128 channels and 25 MHz for 64 > > channels FFT. > > > > The design has ASIAA 5g ADCs with fpga running at 200 MHz and same > noise > > source is feeding both ADCs. > > > > I am using the sma-wideband repository with commit : ecab6f5 > > > > > > Regards, > > Amit Bansod > > > >
