One of the TVs in our house has a Free View box attached to it giving three channels and also allows the recording of programs. However, when watching TV programmes through the box my HF will often cause interference by freezing the picture whilst I am transmitting. What is the best way to solve this problem. I'm not sure what is picking up the RF, the power cable or the TV aerial cable. Thing is, if you watch television directly from the aerial signal television then no interference occurs, it seems that this box is picking up the RF.