supersubby

Good evening all. Have installed pelconet 300t+r units over broadband(wan), connected to a cm6800 matrix with a monitor connected to receiver and a kbd300a controlling cameras. Problem is, can,t get the kbd300a to work the cameras, but if I connect in through p.c it all works via the on screen keyboard, so fine at transmitter end? trouble is the manual doesn,t show connection to kbd300a only the 200a, are there differences in the settings? would appreciate any advise.