Added function arguments in EttusSDR worker.

EttusSDR/blacs_workers.py

@@ -29,7 +29,7 @@ class EttusSDRWorker(Worker):
 
         self.stream = threading.Thread(
             target=usrp.main,
-            args = ()
+            args = (tx_frequency,tones["freq_MHz"], tones["ampl"],duration)
         )
         self.stream.daemon = True
         self.stream.start()