A satellite Diplexer is used outside to combine two separate signals: one signal from the satellite dish and another signal from either an off-air TV antenna or cable TV feed into a single coaxial cable.  A second diplexer is used inside behind the satellite receiver to separate the combined signals.

• Bi-Directional
• 2-860 MHz TV in/out
• 950-2400 MHz Satellite in/out
• Dual port power passing (TV/Sat)
• PVDP2

Satellite Diplexers eliminate the need for extra wiring thereby reducing the cost of labor and installation materials necessary to run two coaxial drops.

A diplexer is a passive device that implements frequency domain multiplexing. Two ports (e.g., L and H) are multiplexed onto a third port (e.g., S). The signals on ports L and H occupy disjoint frequency bands. Consequently, the signals on L and H can coexist on port S without interfering with each other.

Typically, the signal on port L will occupy a single low frequency band and the signal on port H will occupy a higher frequency band. In that situation, the diplexer consists of a lowpass filter connecting ports L and S and high pass filter connecting ports H and S. Ideally, all the signal power on port L is transferred to the S port and vice versa. All the signal power on port H is transferred to port S and vice versa. Ideally, the separation of the signals is complete. None of the low band signal is transferred from the S port to the H port. In the real world, some power will be lost, and some signal power will leak to the wrong port.