... 12,15,18 Optional (or Fixed Type)2,4,6 optional (or Fixed Type)Plug-in AttenuatordB2,4,6,8,10 ... ,4,6,8,10,12 Optional (or Fixed Type)C/CSOdB-71-80C/CTBdB-76-81Cross ModulationdB-70-70Noise ... 16≥16Input, Output ImpedanceΩ75Gain DriftdB±1 (-25~+60°C)Power ConsumptionW≤27Supply Voltage VAC 30~90 (switch power ... 750MHz (112.25~743.25MHz ) when testing the C/CTB and C/CSO, set 79 PAL-D imitate TV channels ...