Hi Marcus, Thank you for the quick reply!
Is there any block in GRC that works with the FPGA in the USRP B210? And I have tried lowering the transition width from 1000 to ~150 but I still see overflow, does this means that the only solution to it is to get a faster computer? Thank you in advanced! From: Discuss-gnuradio [mailto:discuss-gnuradio-bounces+yjinkuan=dso.org...@gnu.org] On Behalf Of Marcus D. Leech Sent: Tuesday, 22 May 2018 11:02 AM To: discuss-gnuradio@gnu.org Subject: Re: [Discuss-gnuradio] GNURadio Companion LPF On 05/21/2018 10:54 PM, Yeo Jin Kuang Alvin (IA) wrote: Hi all, Apparently, I tried connecting the USRP Source to a Low Pass Filter and to a File Sink, I get overflows "OOOOOO". However, when I removed the LPF, there is no overflow. The question is, why is this happening? Is the Low Pass Filter in GRC done in the FPGA or in the computer itself? I am using USRP B210 and my sampling rate is 6MHz. Is there a solution to this? Thank you in advanced! 'O' are caused by the computer not "keeping up". Gnu Radio is a software-defined-radio framework, and all the blocks execute on the PC host. It is typically the case that new users make low-pass filters with very "aggressive" transition bandwidths, which leads to a very expensive-to-compute filter. Try relaxing the transition bandwidth.
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