The eFiberSat L/S-Band Satcom fiber transport subsystem 19” 1RU indoor unit provides a simple, cost-effective, and reliable RF connection between one (or two) IP67 enclosures at the satellite antenna in those cases where coaxial cable is impractical or additional security is required. Please see the outdoors eFiberSAT outdoor unit here _____.  The standard transported RF frequency band with high spur free dynamic range (SFDR) is 30 – 3000 MHz. Options exist for extending the frequency range to 6 GHz on the upper end, and/or 10 kHz on the lower end.

A single eFiberSat fiber transport link can accommodate any combination of up to four (or eight), uplinks and/or downlinks. eFiberSat utilizes Coarse Wavelength Division Multiplexing (CWDM) to transport all RF signals between the Indoor Unit (IDU) and the equipment at the antenna over one (or two) single fibers.

Low phase noise reference clocks may be transported from satcom modems or timing servers to elements at the antenna in a number of ways. Reference clocks may be input on separate 50 Ohm connectors, or the reference may be multiplexed with an RF signal. The reference is transported to the outdoor equipment on a separate wavelength – in this way, the power of the reference may remain high (to minimize residual phase noise) while the separated RF signal is not degraded by intermodulation distortion from mixing with the reference.

An optional low noise transmitter pre-amplifier ensures a margin on signal-to-noise ratio (especially on low received power downlinks) while keeping the signal in the most linear operating range of the fiber link. Optional inline RF gain adjustment facilitates fiber link tuning for optimum RF gain, noise figure, and IIP3/OIP3. Inline gain adjust may be operated in user gain adjust, or automatic gain control (AGC) modes.

Auto-sensing optical switches may be integrated into the 19” chassis to implement redundancy and antenna diversity architectures.  All the functionality of the eFiberSat indoor units in a plugin offering of J3U system.  The 19″ 1U version is for lower cost fixed setup solutions.

The eFiberSat transport subsystem may be monitored in a number of ways. Locally, LEDs and dry contact relay alarms (IDU) provide status. There are multiple ways to monitor the subsystem remotely including serial or SSH console connection, HTTP web user interface, Optical Zonu’s Managed RFoF graphical command and control interface. The management interface also supports SNMP v2 and v3.

Fiber optic transmitters feature linear uncooled isolated DFB laser diodes. Fiber optic receivers feature high performance InGaAs photodiodes. The standard RF interface is 50Ω SMA and may be powered from AC or 48 VDC.