[Discuss-gnuradio] Information on How File Sink Works

[Hasini Abeywickrama]

Hi all,

I have flowgraph that receives a signal from a USRP and converts it to log power FFT and then writes the result to a file, using File Sink.

I want to understand how writing to the file works.

• If the signal is received for n seconds and it takes m seconds to write to the file, will the signal be still received and read within those m seconds?
• Or the signal receiving is resumed after the previous information is all written to the file?

Basically does signal receiving is happening concurrently with writing to the file? Is it possible to lose some part of the signal because of the delay in writing to the file?

I am concerned about this because I am trying to measure the power of a signal
(in a file) that is constantly changing. Any loss of information would have a huge impact on the system I'm developing.

Any idea/comment/suggestion would be very much appreciated.

Thank you for your time!

Regards,

Hasini