I’m not that familiar with burst mode stuff. 

But here’s a start

https://wiki.gnuradio.org/index.php/Burst_Tagger

Also perhaps take this conversation over to the discuss-gnuradio mailing list. 



Sent from my iPhone

> On Apr 22, 2021, at 1:18 PM, Zeng, Huacheng <[email protected]> wrote:
> 
> 
> Hi Marcus,
> 
> Thank you very much for your response. I'm using GNU Radio. Is there a way to 
> set bursty traffic in GNU Radio Companion? 
> 
> Huacheng 
> 
> 
>> On Thu, Apr 22, 2021 at 1:07 PM Marcus D Leech <[email protected]> 
>> wrote:
>> If you set up the steam to be a continuous stream, the USRP expects 
>> continuous samples, and if it doesn’t get them, it produces errors. 
>> 
>> You want to configure your stream for bursts, probably timed bursts. 
>> 
>> Are you using Gnu Radio, or the UHD API directly?
>> 
>> Sent from my iPhone
>> 
>> > On Apr 22, 2021, at 1:01 PM, Huacheng Zeng <[email protected]> wrote:
>> > 
>> > 
>> > Hi all,
>> > 
>> > I am using USRP X310 as an MIMO transmitter to send two streams from a 
>> > computer. The sampling rate is set to 2 MSps. When the computer 
>> > continuously sends data to USRP, it works well. When the computer sends 
>> > data at a slow rate (e.g., 10 packets per second), USRP prints out 
>> > "LLLLLLLLLL" message and it seems the USRP does not transmit any signal. 
>> > 
>> > I expect USRP to transmit signal when it receives data from the computer 
>> > and not transmit signal if no data comes in. 
>> > 
>> > Any advice would be appreciated!
>> > 
>> > Best,
>> > Huacheng
>> > 
>> > 
>> > _______________________________________________
>> > USRP-users mailing list -- [email protected]
>> > To unsubscribe send an email to [email protected]
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