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Re: [Discuss-gnuradio] Question regarding vector_sink_c


From: Eric Blossom
Subject: Re: [Discuss-gnuradio] Question regarding vector_sink_c
Date: Tue, 8 Jan 2008 21:23:15 -0800
User-agent: Mutt/1.5.17 (2007-11-01)

On Tue, Jan 08, 2008 at 08:26:43PM -0800, Wee Shinhan wrote:
> Hi guys,
> 
> I'm using the vector_sink block to capture complex
> data from the receiver USRP (in the hope to be able to
> predict the wireless channel coeff) I printed the
> recevied complex data using the rx_callback function
> in receive_path.py script. The problem is the
> vector_sink produces endless amount of complex number
> even though my transmitter has already finish
> transmitting. I connect my vector sink to
> self.packect_receiver in receive_path.py, the vector
> sink should be empty if no packet is received right?
> If so why am i experiencing this problem. Please
> advice. Thanks in advance.
> 

It depends on where you've connected the vector_sink.

Note that vector_sink was really designed to be used only during QA
testing.  It's not generally useful because it ends up trying to store
a potentially infinite number of samples.

Eric




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