ViaLite RF over fiber links are used in the satellite industry to transport satellite signals between the antennas and Network Operations Center (NOC).  The links can be operated in both the uplink and downlink paths and are typically L-Band HTS, IF 70-140 MHz and C-Band. Additionally, S-Band is used for satellite telemetry and 10 MHz satcom timing and reference links are used for connectivity to LNAs, LNBs and BUC devices.

The RF over fiber process modulates the RF electrical signal onto light using a laser source. The light then travels down the fiber to the receiver where it is converted back to an RF electrical signal by means of a photo diode. Using RF over fiber considerably extends the distance signals can travel compared to coaxial cables.

ViaLite is a market leader in satcom RF over fiber equipment and is used by eight of the top ten teleport operators.


The receive chain

This typically has an LNB or an LNA coupled to a down convertor to take the satellite signal from C, X, Ku or Ka-band down to either L-Band HTS or IF 70/140 MHz.  The signal is then transported across the fiber to the Network Operations Center (NOC) where it is changed back to an electrical RF signal and sent to a switch matrix or straight to a demodulator.

The uplink chain

Typically the signal comes from the modulator in an L-Band HTS or IF 70/140 MHz frequency range and is then converted to light to go across the site to an up-converter or a BUC which takes the L-Band signal and converts and amplifies it, before transmission to the satellite at C, X, Ku or Ka-Band.


Satcom solutions

  • Uplink and downlink for fixed earth stations / teleports
  • Oil and gas platforms
  • VSAT hubs (IP gateways)
  • Long distance links for rain fade and diversity applications


Other typical Satcom sectors