Specifications: 1) 4 channels broadcasting positive video signal, 1 channel high-fidelity positive audio signal and 1 channel reversed asynchronous data 2) ASIC design SMT craftwork 3) Complete digital fiber transmission platform and flexible configuration of different signal 4) Independent intellectual property large-scale special-purpose integrated circuit core 5) Transmit on one fiber 6) PAL/NTSC/SECAM auto-negotiation, broadcasting transmission quality 7) Rate of asynchronous data can reach more than 128kbps 8) RS-485 interface supports full/half duplex 9) Indicator lights on front panel and interfaces of power supply, fiber, video, audio and asynchronous data on back panel 10) Video interface: a) Format: PAL/NTSC/SECAM b) Video signal: 1VP-P c) Video impedance: 75Ω d) Bandwidth: 6.5MHz e) Frequency: 13.5MHz f) Digitization: 10 bits g) DG: 1% (typical value) h) DP: 10 (typical value) i) SNR: 67dB (typical value) j) Color brightness time extension difference: 10ns (typical value) k) Color brightness gain difference: ±10% (typical value) 11) Audio interface: a) Bandwidth: 20Hz - 20kHz b) Frequency: 48kHz c) Digitization: 16 bits (24 bits for option) d) Input impedance (line-in): 47kΩ unbalance e) Output impedance (line-out): 10kΩ unbalance f) Input/output voltage: 2Vp-p g) Unbalance SNR: 75bB (typical value) H) Total wave distortion: 0.1% (typical value) 12) Asynchronous data: a) Interface: RS485/422 Manchester (CH1, 3, 5, 7) or RS232 (CH2, 4, 6, 8) b) Working mode: full/half duplex (only for CH1 and CH3) c) Rate: DC 128kbps d) Error code rate: