Do anybody know that why signal strength is weak on Galaxy 19, frequency 12122, symbol rate 20,000. Polarity - H. I rent a transponder on this frequency, but most of my customer can not scan to find our channel Nu vision tv. Most of the customer watch thai - Lao channel that tune to frequency 12090, symbol rate 20,000. My customer want to tune and scan to 12122 and they can not find Nu vision channel. The signal weak. Do you know what is causing this. I talk to satellite company and they its on the same symbol rate it should not happen. My customer the one that they able to find our channel sometime can watch and someday the screen just black out.