Features: 1) LED display of output channel 2) Designed by adjacent channel transmission standard, no disturbing between adjacent channels; Input and output of Video/Audio intermediate frequency signal used for scrambling subscription CATV system 3) Oscillator using unique phase-lock (PLL) circuit makes phase noise extremely low, and video clear and stable 4) 19-inch standard structure, independent power supply, flexible fit out, elegant appearance, firm structure, nice electromagnetism shield and convenient operation and maintenance