RFoF-C 5 MHz–6 GHz Remote-Controlled Analog RF Over Fiber Link

The SANLAND RFoF-C is a remotely controlled analog RF over fiber link designed to transport RF signals from 5 MHz to 6 GHz over single-mode fiber. One 6G-C TX and one 6G-C RX form a complete point-to-point RF optical link, with 50 Ω SMA interfaces and a 1550 nm FC/APC optical connection.

An internal microcontroller, programmable attenuation and selectable LNA modes allow users to remotely configure link gain for different RF input conditions. Through the RJ45 Ethernet interface, operators can adjust gain and monitor RF level and temperature from a remote computer, reducing the need for on-site maintenance at remote antenna, Satcom, DAS and broadcast locations.

 RFoF-C Functional Architecture

A complete RFoF-C link integrates RF signal conditioning, optical conversion, embedded monitoring and Ethernet control across the transmitter and receiver.

• RF Signal Conditioning

LNA and attenuation stages manage RF signal levels through the link.

• Optical Conversion

RF signals are converted for transmission over single-mode fiber and recovered at the receiver.

• Ethernet Control & Monitoring

Embedded MCUs connect control and monitoring functions to the RJ45 Ethernet interface.

 Selectable RF Operating Modes

LNA OFF : Higher input-power handling and 103 dB·Hz^2/3 SFDR for stronger RF input signals.

LNA ON : 36 dB nominal link gain and 8 dB noise figure for low-level RF signal reception.

 Frequently Asked Questions

• What functions can be controlled and monitored remotely on the RFoF-C?

Through the RJ45 Ethernet interface, users can remotely adjust link gain, including control of the transmitter’s programmable attenuation. Remote PC software also supports RF-level and temperature monitoring.

• How is the RFoF-C connected to a control computer?

The RFoF-C connects to a control computer through its RJ45 Ethernet interface. Remote PC software provides access to the available adjustment and monitoring functions.

• What is the programmable attenuation range?

The RFoF-C transmitter provides 0–31 dB programmable attenuation in 1 dB steps, allowing the RF signal level to be adjusted for different input conditions.

• What is the difference between LNA ON and LNA OFF modes?

LNA ON provides 36 dB nominal link gain, an 8 dB noise figure and a −35 dBm input P1dB, making it suitable for lower-level RF input signals. LNA OFF provides 6 dB nominal link gain, a 29 dB noise figure, a −5 dBm input P1dB and 103 dB·Hz^2/3 SFDR for stronger RF inputs.

• How many modules are required for a complete RFoF-C link?

A complete RFoF-C link requires one 6G-C TX and one 6G-C RX. The transmitter converts the RF input to an optical signal for transmission over single-mode fiber, and the receiver converts the optical signal back to RF at the remote end.

• How does the RFoF-C differ from SANLAND’s other 6 GHz RFoF links?

RFoF-C is designed for applications that require remote control and real-time monitoring, rather than only RF signal transmission. In addition to 5 MHz–6 GHz analog RF over Fiber transmission, it integrates an internal MCU, programmable RF control, RJ45 Ethernet connectivity, RF level monitoring and temperature monitoring.

This makes RFoF-C particularly suitable for remotely deployed RF systems where operating parameters need to be adjusted or monitored from a centralized location.

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