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Wzmacniacz antenowy Johansson 7720 12V to urządzenie przeznaczone do poprawy jakości sygnału telewizyjnego w instalacjach naziemnych. Dzięki stabilnemu wzmocnieniu sygnału w zakresie 13–24 dB pozwala uzyskać lepszy odbiór kanałów na większych odległościach od nadajnika.

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Urządzenie obsługuje częstotliwości od 47 do 790 MHz, co czyni je kompatybilnym z większością standardowych instalacji antenowych. Maksymalny poziom sygnału wejściowego wynosi 88 dBuV, a wyjściowego 104 dBuV, co zapewnia odpowiednią dynamikę i minimalizuje zakłócenia. Wzmacniacz cechuje się także tłumieniem odbić większym niż 8 dB, co poprawia dopasowanie do anteny i odbiornika.

\r\n

Wzmacniacz posiada 1 wejście i 2 wyjścia złącza typu F, umożliwiając jednoczesne podłączenie kilku odbiorników. Zasilanie przedwzmacniacza odbywa się napięciem 12 V DC (55 mA), natomiast całe urządzenie zasilane jest z sieci 230 V przy poborze mocy 3.5 W.

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