RF Over Fibre Optic Link
ETL's StingRay RF over Fibre inter facility links (IFL) convert high quality RF to optical signals over single mode fibre from, for example, a satellite antenna to reception equipment room, up to 10 km away, with options for distances up to 50 km.
COMPACT OPTIONS: We can offer a solution for ultra-compact requirements or for smaller applications such as a single antenna. Our range is split in to 100 series and 200 series RF to optical alternatives. The 100 series range offers up to 16 RF over Fibre links in a 1U chassis. Our 200 series range offer twin module options, where 2 separate links are provided on one module or with a -20 dB monitoring port for INPUT SIGNAL MONITORING.
Our standard 100 series and 200 series RF over Fibre modules provide AGC (Automatic Gain Control) with automatic link optimisation for FAST SET-UP or wide dynamic range links with FIXED GAIN FOR INPUT POWERS UP TO +6 dBm.
If you require ENHANCED RESILIENCE our StingRay RF over Fibre range offers 1+1 redundancy and 4+1 or 4+2 redundancy systems.
HIGH DENSITY & LONG DISTANCE OPTIONS: CWDM modules (coarse wavelength division multiplexing) provide up to 50km transmission compact fibre links, with eight wavelengths on a single fibre cable. DWDM modules (dense wavelength division multiplexing) provide up to 45km transmission fibre links, and beyond with optical amplification (EDFA), with up to fourty wavelengths on a single fibre cable.
Fibre cable is used as an alternative to copper coaxial cable for inter-facility links at satellite ground stations for the transmission of RF signals at ground stations, typically from a remote satellite dish farm to broadcast headends.
- Fibre is much lower cost than copper cable
Beyond a few hundred metres an optical link is cheaper
Cable savings cover extra cost of equipment at each end.
- Fibre has much lower loss, 0.4 dB per km
Beyond around 700m a fibre link will have better noise performance.
- Fibre is much smaller than copper
Number of feeds rising, duct space limited.
- Fibre has a much higher information carrying capacity
Use wavelength division multiplexing to place many feeds on a single fibre.
Easier to manage
Further cost and space improvements
- Fibre does not conduct electricity
Fewer problems with lightning strikes
StingRay RF over Fibre uses single-mode fibre as the optical performance is improved over long distances and wider bandwidths. Single mode fibre has a core of approximately 9um which allows only a single mode of light to diffuse as it travels down the cable.
The smaller diameter of single mode fibre leads to a lower number of internal reflections when compared to multi mode fibre.
The benefits of this are:
- Lower loss
- Increase in link distance
- Wider signal bandwidths
- Ku-band and Ka-band ready for HTS applications
- Distribution of comms traffic across site with minimal loss
- General satcoms- teleports, video head-ends, TVRO
- Compact solution for small quantity links such as tactical HQ
- A resilient solution for satellite teleports with transition distances up to 50km