Hey everybody, I'm trying to put together a simple bursting example. In
gnuradio companion I'm generating a PDU, using the framer block, converting to
a tagged stream, and then inserting a tx_time tag in an OOT python block. The
tx_time tag is at the beginning of the streamed frame, just prior to the
packet_len tag. I send it to the USRP next.
The USRP is sync'd to PC time at the beginning of the flowgraph, and I set the
tx_time tag for two seconds in the future. The USRP does seem to transmit at
that time, but it generates lots of L error symbols, and after the initial
transmission stops transmitting. I can see the stream sent to the USRP via a
tag debug block, so I know the stream is received by the USRP significantly
prior to transmittal.
Any thoughts as to what's going on? is there something I need to configure on
the USRP?
Thank you,
Jason
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