... series Digital Video Optical Converter is used for real-time, high-resolution, long-distance and non-distorted transmission ... 3-level surge protection design for High voltage, Low voltage, and static;7. Power supply with AC 220V, DC-48V, 24V, 12V ... 65dBFrequency ParameterNominal Input/output PWL 2VpFrequency Width 20Hz~20KHzSampling Frequency 48KHzData ParameterData TypeRS-232, RS-485/422, Manchester, ...