[Discuss-gnuradio] Head block in GRC

[George-Henri Simon]

Hi,

 

I am trying to use the head block in GRC to limit the amount of dat written to a file. Currently I have a very basic configuration set up in GRC with a file source(text data) set to repeat going into the head block going into a throttle to control the sampling rate and going into a file sink.

 

For the head block I have played around with the Number of Items and Vector Size parameters. I have been able to get it to work with some combinations of numbers but they didn't seem to follow any logical pattern. For example if I set the head block input to bytes, Num Items to 50, and Vector Size to 1 I would have thought I would geta  50 byte output file but the file was blank (0 bytes). Any idea on what could be causing this?

 

Thanks,

Dave