GPS over Fibre technology can be used to extend the range of a GPS antenna feeder cable well beyond what is achievable by use of coaxial cables.
Signal losses through attenuation limit the range of a coaxial cable-based system to perhaps a few hundred metres when using low-loss cable and amplifiers, whereas an optical fiber system has a reach of several kilometres by comparison.
The transmit module converts RF signals from the outdoor antenna into light pulses and transmits them down the optical fibre link.
The receiver at the far end converts the light pulses back into RF signals and passes them to the GPS equipment (repeater | receiver | timing module).
Example system – designed to provide a timing signal to a GPS-enabled system 200 metres underground.
The alternative would be to use three segments of coaxial cable with two in-line amplifiers.
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