Outperforms lower quality diplexers with higher insertion loss and lower isolation between the satellite and terrestrial frequencies. Combines and separates DBS satellite with off-air and cable television signals. Nickel-plated zinc die-cast housing with precision machined ports reduce interference and signal leakage. 360ø insert pins provide maximum signal transfer maintaining a distortion free signal for digital transmission. Weather sealed ports resist moisture to 30PSI that can degrade picture quality and affect performance.