About set-top box sharing technical parameter

Radio frequency output frequency …………………………77.25MHz (VL frequency band)

Radio frequency power output and impedance ……………………………80dB/75?

Sound accompaniment subcarrier wave frequency ……………………………………6.5MHz

Infrared signal subcarrier wave frequency …………………………………38KH

Video input, power output and impedance ……………0.75-1Vpp/75?

Transmitting range ……………………………………………?100M

Working voltage ……………………………Ac220±10%th, 50/60Hz

Consumed power ………………………………………………?3W

Who can give me to explain that is any meaning.Incomparable thanks.

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