"Customer the Kathrein BZD had bought 30 DVB-T antenna, also bought this product." The Poor! Hopefully you can solder and have suitable measuring instrument: The King Freeview Spannungseinspeise adapter sends exactly 5.0 volts - not for active DVB-T antenna, but the television. So do not get the no antenna feed voltage and amplifies the received signal, of course. Sorry, there are jacks (male - female) reversed. Because the part is completely soldered and could perhaps open more than a gas burner, help just two accordance with self-made cable (male - male and female - female). After work, you will be rewarded with a very good TV reception. The difference is like night and day. I wish sufficient success. And a lot of fun making.