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Re: [Discuss-gnuradio] RFX 2400 transmit-receive turnaround

From: Eric Blossom
Subject: Re: [Discuss-gnuradio] RFX 2400 transmit-receive turnaround
Date: Thu, 11 May 2006 08:37:53 -0700
User-agent: Mutt/1.5.9i

On Thu, May 11, 2006 at 10:03:05AM -0400, Bob Vincent wrote:
> We've been doing some testing on the RFX, and have found that delaying 
> between packets sometimes causes receive errors. I suspect it may have to 
> do with the transmit/receive turnaround. Do you have any information on the 
> design of the RFX that might help me diagnose the source of the problem?


If you're not kludging up the padding to ensure that the output of the
sample stream for a given frame is a multiple of 128 complex samples
(512 byte USB packet), the tail of the frame may not be getting
across the USB.

Do you see this with the gmsk2 code and/or psk?  The gmsk code has the
proper alignment kludge.  [ We *really* do need that m-block stuff ;) ]

Can you reproduce the problem with benchmark_gmsk_{tx,rx}?
If you haven't already, please try the --discontinuous option to tx.


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