For me, no function

According to theory, the switch would have 2 receiver to a satellite antenna cable permit, with the higher priority (Master) takes precedence, and the slave only be given access to the LNB, if the master is not active (off) - the latter is the switch property as it stands in the article description. Great idea in theory - unfortunately in my case not be implemented:
From an initially optimum signal strength and quality is nothing left at the output of this preference Schaler with my two models of Wentronic 51445. The Receiver DC voltage of 18V can be detected, but what good is that if neither master nor slave cause the signal at the output. I have numerous constellations tried - with three different inline amplifiers, to compensate for any attenuation losses - to no avail.
For this reason I would like to warn against overly high expectations for this product. I sit now instead a manual switch a satellite, which serves the same purpose.
Separately, kudos to the dealer Incubator24 who responded without hesitation, friendly, fast and accommodating to my complaint and also replacement delivered.