[Discuss-gnuradio] USRP timing offset

[Leonard Foxes]

Hi everyone!

I’m new to Gnuradio e USRP. I use a USRP N210 with WBX daughterboards and loop back cable to connect TX e RX. I have tested USRP with a simple flowgraph (sine , usrp_sink , usrp_source) and I have observed that the output signal from usrp_source block  is time shifted. I mean, the usefull output signal starts after 0.0105 seconds. How can avoid this? I have tried to use “issued_stream_cmd”,  setting time_spec=0.0105 s but nothing has changed.

I want to use this USRP in a more complex project and I need to remove this initial time-shift.

I attach a plot of input and output signal and my flowgraph.

Thanks in advance for help,

Leo 

sine_test_USRP.py
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sine(b)_usrp(r).png
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sine(b)_usrp(r).fig
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