Changed installation - the other way out of it is a shoe

As I read here pretty often, the product is working properly or not at all. The second was the case with me. After lengthy considerations, I tried to eliminate all sources of error: Installation success in rd. 20-meter line about one third before the receiver and all F-connectors were properly mounted. Second receiver connected and the image quality was, especially with the new HD channels bad or there was no reception.

As a last resort, it seemed to me, the thought came upon awakening that the housing on both sides looks absolutely identical and the installation sketch was a sticker on it! The could be glued wrong indeed. For whatever reason. Dismounted amplifier, flipped and everything absolutely perfectly. Perfect product to wit Price. By the way this thing will cost in the "intelligent" with other printed five times as much.