The device can split the input of a satellite receiver to three outputs. So you can connect three devices (receiver or TV). Of course, you have the three terminals, the same restrictions that you had previously with a device eg for parallel recording and PIP (picture in picture. Two channels can be combined only if the receiving fits together (polarization). I have connected the device, and then measured the output signal. The signal is probably somewhat weaker than before. I express it this way vague, because it's really hard to measure. Now I come to the question of how the reception of the three terminals affected qualitatively, if you use the same terminal. I have found nothing negative, that is, all three devices have the same good reception. This is of course the fact that the length of cable from the LNB to the terminals is low.