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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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