GNU Radio Input Block Size

GNU Radio
1

It seems the biggest block (complex) is 4095 samples. Can you go larger
than this with some software hacks? Also, when you get a “U0” How do
you know how much data you dropped?

Thanks,
Isaac

2

Isaac G. wrote:

It seems the biggest block (complex) is 4095 samples. Can you go larger
than this with some software hacks? Also, when you get a “U0” How do
you know how much data you dropped?

Take at the defines in fusb_sysconfig_linux.cc (given you’re using
linux). This is where these numbers come from. However, you don’t have
to change the defines, you just need to change how the usrp_basic_rx()
is called, and change the parameters there. The defines are just the
default.

The comment “// fewer kernel memory problems” with 4*1024 may suggest
that Eric chose some of these parameters for a reason. Unfortunately
he’s on vacation for the next 3 weeks I think.

  • George