I have built a testbench that transmits a simple sine wave through the FMComms2/3/4 Sink and receives it through the FMComms2/3/4 Source. I noticed that the signal received from the FMComms2/3/4 Source does not appear continuously (I want to transmit and receive multiple packets in real time, so I have to set the Cyclic mode of the Sink block to False). Please let me know how to make the received signal appear continuously. Below are images describing the testbench on GnuRadio and the hardware setup.