The Eddystone S7603 3kW FM Transmitter continues the tradition of highly modular architecture, efficiency, and ease of maintenance that characterizes Eddystone Broadcast transmitters. Let’s delve into its features and specifications:
Features:
- Modular Design: Incorporates hot-pluggable Power Amplifier (PA) modules, enabling easy removal and replacement without significant reduction in output power. This modular approach simplifies maintenance and reduces downtime.
- Efficient Power Supplies: Utilizes highly efficient hot-pluggable switched-mode power supplies (SMPSU), contributing to ease of servicing and minimizing spares holding costs. Commonality of PA and SMPSU modules across the 7600 range enhances cost-effectiveness.
- Compliance: Fully compliant with the ETS 300 384 specification for FM transmitters, ensuring reliability and adherence to industry standards.
- System Flexibility: Easily configurable into various system architectures to accommodate diverse operational needs and environments.
- Efficient Operation: Employs highly efficient SMPS power supplies with power factor correction (PFC), optimizing energy usage and reducing operational costs.
- Remote Control and Monitoring: Provides comprehensive remote control and monitoring facilities for efficient management and supervision of transmitter operation.
- User-Friendly Interface: Features an LCD display for convenient local monitoring, offering clear visibility of system parameters and status.
System Overview:
- Drive Input: Fed to an internal 12-way splitter, supplying input drive to the PA modules.
- Power Amplifier Modules (E2021): Each module utilizes dual-packaged MOSFETs mounted on substantial heatsink assemblies with efficient airflow. Internal control and self-protection mechanisms ensure safe operation.
- Central Transmitter Controller/Monitor (E2023): Receives and displays internal parameters from individual power amplifier modules, facilitating centralized monitoring and control.
- RF Output Combining: Outputs from the 12 power modules are combined via a highly efficient 12-way common rail Wilkinson combiner, ensuring optimal RF output.
Cooling Systems:
- Features self-contained redundant cooling fans mounted on the rear of the transmitter, with optional ducting for customized cooling solutions.
Specifications:
- Power Output: 3kW (adjustable to -6dB)
- Operating Frequency: 87.5 to 108 MHz
- RF Output Load Impedance: 50 ohms unbalanced
- RF Output Connector: 7/8″ EIA
- Maximum VSWR: Able to maintain full power at 1.5:1 before protection cuts in
- Mains Power Supply: Single-phase 176-264V
- RF Harmonic Output: Better than or equal to -79dBc
- Power Factor: Typically 99%
- Ambient Temperature Range: 0°C to +55°C at an altitude up to 3000M
- Overall Efficiency: Typically 60%
This transmitter offers a robust solution for FM broadcasting, combining high performance, reliability, and ease of maintenance to meet the demands of professional broadcasting environments.
