Fiber DAS Solutions Overview

Fiber DAS (Distributed Antenna System) solutions consist of three main components: the fiber optic master unit, the optical fiber, and the fiber optic remote unit. Both the master and remote units integrate radio frequency (RF) modules and optical modules to ensure seamless signal transmission and coverage extension.

Downlink Operation:

1. Signal Input: The RF signal is extracted from the base station and delivered to the fiber optic master unit.

2. Electro-Optical Conversion: Within the master unit, the RF signal is converted into an optical signal.

3. Optical Transmission: This optical signal is transmitted through the optical fiber to the fiber optic remote unit.

4. Signal Amplification & Coverage: The remote unit converts the optical signal back into an RF signal, amplifies it, and transmits it through the distributed antenna system to effectively cover the target area.

Uplink Operation:

The uplink process mirrors the downlink:

1. The signal from the user device is received by the antenna and routed to the fiber optic remote unit.

2. It is converted into an optical signal and transmitted back through the optical fiber to the fiber optic master unit.

3. The master unit converts it back to an electrical RF signal and forwards it to the base station.

Characteristics

•       High-Performance Duplex Filtering: Utilizes a duplex filter with high isolation and low insertion loss to effectively eliminate crosstalk between uplink and downlink signals.

•       Low Noise & Excellent Linearity: Engineered for low system noise and high linearity, ensuring no interference with base stations or other wireless equipment.

•       Long-Distance Transmission: The near and far units are connected via optical fiber, offering long transmission distances, low signal loss, and support for one-to-many networking, providing high flexibility and scalability.

•       Integrated Intelligent Module: Features a highly integrated and intelligent design, simplifying installation, upgrades, and maintenance.

•       Software Monitoring (Optional): Available with an optional software monitoring version for real-time system management.

•       Visual Status Indicators: Optional screens and LED indicators can be included to display system status at a glance.

•       Multi-System Compatibility: Fully supports mainstream digital communication standards including DMR, dPMR, P25, and PDT.