You'll have to use timed commands for starting your transmissions. This can be done in GRC, but requires writing some code to issue the commands. Usually I find it easier to add the commands to the generated Python if I'm not changing the application very often.
Here's a C++ example that shows timed stream commands. You'd need to use these for both the transmit and reception side.
https://github.com/EttusResearch/uhd/blob/master/host/examples/test_timed_commands.cpp#L111
Regards,
Derek
Dear GNU Radio users,
I have a simple program, Signal source (square) -> USRP SINK USRP SOURCE - > TIME SINK.
If I plot Tx/Rx signals in a Time sink, I see, that there is a time differnce, which is OK. But each time I start the program, the time difference changes (As shown in a picture in attachements).
What can I do? I tried to change Sync, Clock rate, Clock Source, Time source....everything. But still the delay is changing each time I execute my program.
If the delay was not random I could just substract that. This causes me problems in every radar program, since I need precise time measurements.
Regards
Petr
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