Re: [Discuss-gnuradio] What does the USRP transmit after I've done tx->stop.

[Dan Halperin]

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I don't know how relevant this is, but I have fixed similar problems  
in the past by making sure that the host app sends data that's an even  
multiple of 512 bytes. (This is harder than you think :))

I found that if you send a number of sample bytes equivalent to 1 same  
mod 512 bytes, for instance, the last sample is repeated for some time  
and can be observed as a short pilot tone. I never did too much  
digging into this, however -- I just modified the transmitting app to  
pad.

- -Dan

On Apr 25, 2008, at 7:31 AM, George Nychis wrote:

> Per Zetterberg wrote:
> > Hi All,
> > I am transmitting a stream of buffers from the USRP (based on  
> > libusrp with
> > standard .rbf file). After I've done tx->stop (where tx is a  
> > pointer to
> > usrp_standard_tx) it seems that the USRP is repeating the last  
> > transmitted
> > buffer (or couple of buffers ?). Is this correct ?
>
>
> Continually, until you unplug the board?  If so, I've noticed this  
> behavior too as of recent... I used to be able to replicate it 100%  
> of the time, but haven't tried for a couple weeks.
>
> Are you using the current GNU Radio trunk?
>
> - George
>
>
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