Terrestrial Satellite Masthead Diplexer is a device used in satellite TV installations to combine the signals from a satellite dish and a terrestrial antenna onto a single coaxial cable. It is commonly used in situations where both satellite and terrestrial signals are needed, but only one cable can be run to a receiver.
The diplexer is installed at the masthead, which is the point where the satellite dish and terrestrial antenna cables converge. It works by separating the satellite and terrestrial signals into separate frequency bands and directing them to the appropriate output port.
The diplexer typically has three ports: a satellite input port, a terrestrial input port, and a combined output port. The satellite input port is connected to the satellite dish, the terrestrial input port is connected to the terrestrial antenna, and the combined output port is connected to the coaxial cable that runs to the receiver.
The diplexer is designed to provide minimal signal loss and distortion, and it typically has a high-quality construction to withstand harsh weather conditions.
Terrestrial Satellite Masthead Diplexer is a useful device for combining satellite and terrestrial signals onto a single cable in satellite TV installations, and it allows for the efficient use of cabling without compromising signal quality.
Operating frequency range
5 .. 854MHz
950 .. 2300MHz
Isolation in Band II (FM)
Isolation in band III (DAB or TV)
Isolation in Bands IV-V (UHF)
Isolation in terrestrial band
Isolation in SAT band
Line-power pass from common port
Line power-pass ratings
20V max. at 250mA max.
Signal Connector Type
Type-F (IEC 60169-24)
Operating temperature range
-20 .. +50C
BS EN 50083-2:2001 (Class B)
VHF B II
VHF B III
UHF B IV-V
* Return band: 5 - 30MHz. 1 All 'terrestrial' bands: 5 - 854MHz. 2 See full data sheet for detailed insertion loss and isolation info.
Symbols: ? dedicated band input; band covered by UHF input; * band input with power pass to COM port.
1.= 2.8dB in band edge region 780 .. 854MHz 2.= 5.5dB in band edge region 950 .. 1100MHz
3.= 0.7dB in return-path band 5 .. 30MHz 4. Applied over 5 .. 854MHz - typical performance >60dB
5.= 23dB in band edge region 950 .. 1100MHz 6.= 2.7dB in band edge region 780 .. 862MHz