GPS over Fibre
GPS Point-to-Point Optical Fibre Link
RF over Fibre (RFoF) technology can be used to extend the effective range of a GPS antenna feeder cable well beyond what is achievable by use of coaxial cables. Losses through attenuation limit the range of a coaxial cable-based system to perhaps a few hundred metres, whereas an optical fibre system has a reach of several kilometres by comparison.
The point-to-point link consists of a pair of transmit and receive modules. The transmit module converts RF signals 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 Repeater module.
- The transmit module provides a DC voltage to the low noise amplifier (LNA) in the GPS antenna.
- The receive module terminates the DC voltage output from the GPS repeater and presents an impedance that simulates that of a GPS antenna.
- Standard optical connector type is SC/APC (FC/APC on request).
- Power for each unit is via the DB9 connector and an external +12V power adapter.
- Optional RS232 data modem, alarm and monitoring function also available via a DB9 connector.
Example system – designed to provide a GPS timing signal in a mine. The alternative would be to use three segments of coaxial cable with three in-line amplifiers: if fibre is available this option is very cost-effective and easy to install.
For pricing, lead times and any other information please contact FalTech GPS.