Hello,


I've been having an issue with the USRP where I've found if I have a continuous 
waveform segmented over multiple packets, it is difficult to transmit it on the 
USRP. The scenario is as follows:



I am using a USRP x310 with UHD version:

[INFO] [UHD] linux; GNU C++ version 4.8.5 20150623 (Red Hat 4.8.5-36); 
Boost_105800; UHD_3.13.0.3-24-g00019176



Packet 1 has 100 samples. I do a send starting at time 0 with 100 samples. 
Packet 2 has 50 samples. I do a send starting at time 100 with 50 samples. 
Packet 2 is marked late and doesn't send properly.



Packet 1 has 100 samples. I do a send starting at time 0 with 100 samples. 
Packet 2 has 50 samples. I do a send starting at time 101 with 50 samples. 
Packet 2 sends properly, but now I have a sample delay inserted into the middle 
of my waveform.



Packet 1 has 100 samples. I do a send starting at time 0 with 99 samples. 
Packet 2 has 50 samples. I do a send starting at time 101 with 50 samples. 
Packet 2 sends properly, but now I have a blank sample inserted into the middle 
of my waveform.



The obvious solution is to reassemble my fragmented packets before making a 
tx_streamer->send() call. I'm wondering if there is a way to replicate the 
behavior of a single large transmit request using multiple smaller transmit 
requests?



Thank you,

Richard

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