Transmitting between multiple UHD devices

Hi all

I am new to GNU radio and I need to implement a system that transmits a
signal from one UHD device to a different UHD device that is connected
to a different PC. I am using N210 UHD devices with TX/RX daughterboards
and GNU radio companion on Ubuntu with all images/drivers installed. So
far I have developed a basic program that can sink and source a signal
on the same device without any problems. (The signal is actually being
sent because channel noise can be seen on the output)

The problem starts when only transmitting on one UHD device and
receiving on the other device (the Rx side only receives noise). I have
tried replacing the device’s antenna, changing the different UHD subdev
and antenna setting. Is there maybe some basic configuration that needs
to be done when transmitting over the air that is generally overlooked?
If not I will upload the grc file as soon as it is available. Any
valuable feedback will be appreciated.

Thanks in advance.
Dan