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50kW EIRP Complete FM Radio Transmitter Broadcasting System
4kW FM Transmitter Power
To achieve 50kW EIRP only 4kW of FM transmitter power is needed if the correct antenna is installed with high grade coaxial cable. The 4kW of FM transmitter power comes from 4 separate 1kW amplifiers that are driven by a distribution amplifier and Veronica® 1W PLL driver. All our big systems above 10kW EIRP are configured this way using more than just a single 1kW amplifier. Due to this a complete shutdown or signal failure can only occur if the 4 amplifiers (1kW each) go down at exactly the same time, this is nearly impossible with super high odds. So if you need system reliability and a station on air, always, with no breakdowns, 4 or more if possible, 1kW amplifiers are perfect.
Achieving 4kW FM Transmitter Power
Achieve Maximum Reach: 100kW Effective Isotropic Radiated Power (EIRP) with Only 4kW FM Transmitter Power
This section details how to achieve a powerful 100kW EIRP while utilizing only 8kW of FM transmitter power, emphasizing system reliability and professional design.
Key Component Requirements for 100kW EIRP
Achieving optimal signal strength requires a strategic combination of high-quality components, minimizing the required FM transmitter power:
•FM Transmitter Power: Only 4kW is required.
•Antenna System: Installation of the correct, high-gain antenna.
•Transmission Line: Utilization of high-grade coaxial cable.
System Architecture for High-Power FM Broadcasts.
Our large-scale FM transmission systems, particularly those configured for 10kW EIRP and above, are engineered for maximum performance and stability. The standard configuration for the 8kW FM Transmitter utilizes a highly robust, modular design:
Individual Amplifiers:
•Quantity: 8 Separate Units.
•Power/Function: 1kW each.
•Benefit: Redundancy and Reliability.
Driver:
•Quantity: 1.
•Power/Function: Distribution Amplifier.
•Benefit: Signal Distribution.
PLL Driver:
•Quantity: 1.
•Power/Function: Veronica® 1W PLL
•Benefit: Precise Frequency Control.
4kW FM Transmitter Power
To achieve 50kW EIRP only 4kW of FM transmitter power is needed if the correct antenna is installed with high grade coaxial cable. The 4kW of FM transmitter power comes from 4 separate 1kW amplifiers that are driven by a distribution amplifier and Veronica® 1W PLL driver. All our big systems above 10kW EIRP are configured this way using more than just a single 1kW amplifier. Due to this a complete shutdown or signal failure can only occur if the 4 amplifiers (1kW each) go down at exactly the same time, this is nearly impossible with super high odds. So if you need system reliability and a station on air, always, with no breakdowns, 4 or more if possible, 1kW amplifiers are perfect.
Achieving 4kW FM Transmitter Power
Achieve Maximum Reach: 100kW Effective Isotropic Radiated Power (EIRP) with Only 4kW FM Transmitter Power
This section details how to achieve a powerful 100kW EIRP while utilizing only 8kW of FM transmitter power, emphasizing system reliability and professional design.
Key Component Requirements for 100kW EIRP
Achieving optimal signal strength requires a strategic combination of high-quality components, minimizing the required FM transmitter power:
•FM Transmitter Power: Only 4kW is required.
•Antenna System: Installation of the correct, high-gain antenna.
•Transmission Line: Utilization of high-grade coaxial cable.
System Architecture for High-Power FM Broadcasts.
Our large-scale FM transmission systems, particularly those configured for 10kW EIRP and above, are engineered for maximum performance and stability. The standard configuration for the 8kW FM Transmitter utilizes a highly robust, modular design:
Individual Amplifiers:
•Quantity: 8 Separate Units.
•Power/Function: 1kW each.
•Benefit: Redundancy and Reliability.
Driver:
•Quantity: 1.
•Power/Function: Distribution Amplifier.
•Benefit: Signal Distribution.
PLL Driver:
•Quantity: 1.
•Power/Function: Veronica® 1W PLL
•Benefit: Precise Frequency Control.
12 dBi Gain, Eight Antennas: Calculating Effective Isotropic Radiated Power (EIRP)
Antenna Power Multiplication
This eight-way antenna transforms transmitter power by over 10 times to the final EIRP, even after cable losses.
• EIRP Definition: The signal radiated is Effective Isotropic Radiated Power (EIRP).
• Significance: The signal voltage at the horizon is effectively identical to a much higher-powered transmitter using a single dipole.
The power is effectively identical, hence the name Effective Isotropic Radiated Power (EIRP).
Integrated Dynamic RDS (Radio Data System)
RDS is now included on all stereo transmitters with audio processing. RDS shows your station name and more scrolling across the car radio display.
This RDS is not just ordinary RDS, it is fully programmable dynamic RDS. This means the transmitter can be connected to a PC by a USB cable. The transmitters RDS circuit can be programmed to pick the Artist and Song name from any folder on the PC disk drive. This folder is easy to set up in the DJ playout software, like Zara Studio etc.
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PACKAGE CHECKLIST
| Qty | Description | Item |
| 1 | FM Stereo Driver with Audio Processing |  |
| 1 | Distribution Splitter Amplifier |  |
| 4 | 1000W FM Power Amplifier |  |
| 4 | LMR600 40m /131ft Cables |  |
| 1 | All Other Connecting Cables |  |
| 8 | Broadband High Power Folded Dipole Antenna with Tower Mounting Clamps |  |
|
LIMITED WARRANTY |
40 Meter (130 Feet) LMR-600 Coaxial Antenna Cable: Ultra-Low Loss and High-Gain Performance
This section details the specifications of our LMR-600 coaxial antenna cable, a critical component chosen to ensure maximum power transfer efficiency and signal integrity in professional FM broadcast systems.
Expert-Grade Specifications for Minimal Signal Loss.
Utilizing LMR-600 cable is paramount to achieving specified EIRP levels. Its super low loss characteristics ensure that the maximum power generated by the amplifiers reaches the antenna stack.
• Cable Type: LMR-600 Coaxial Antenna Cable.
• Length: 40 Meters (130 Feet).
• Loss Performance: Exceptional -1 dB of loss over the entire 40-meter run (tested at 100 MHz).
• Efficiency Benefit: This minimal signal loss guarantees that most of the power developed by the amplifiers is transferred with ease to the huge gain antenna stack, preventing wasted energy.
Robust Construction and High-Powered Termination.
The physical characteristics and professional termination of the cable contribute directly to its reliability and longevity:
• Durability: The cable is designed to be robust yet flexible, simplifying installation while ensuring long-term resistance to environmental stress.
• Physical Dimensions: External diameter of approximately 13mm / 0.5 inch.
• Connectors: Both ends are factory-fitted with high-quality, high-powered Teflon DIN7-16 connectors, which are essential for maintaining the low-loss integrity and safe operation at high power levels.
50kW Maximum FM Transmission Range Chart: Real-World Listener Data
Understanding Typical Broadcast Coverage
The following range chart is derived from real-world customer reporting, providing a reliable baseline for expected broadcast coverage. This data reflects the typical distances recorded by professional and community stations utilizing our 1W EIRP systems.
- Data Source: Based on average customer signal reports across various geographical environments.
- Verification: Reports are compiled from direct listener communication (phone, text, WhatsApp) to radio stations operated by Aareff customers.
- Zero-Failure Promise: Because this system is perfectly impedance-matched (1W Transmitter to 0dB Dipole), it ensures exactly 1W EIRP is radiated, maximizing range without equipment strain.
It is important to understand that FM transmission range is influenced by numerous variables (e.g., terrain, antenna height, atmospheric conditions, local noise floor). For a detailed breakdown of the factors affecting signal propagation, refer to our dedicated guide on FM Transmission Range.
FM Stereo & Processing: Loud, Crisp Broadcast Quality
The Veronica® system is engineered to deliver a high-impact audio signature. Whether you rely on our internal high-performance processing or your own external rack equipment, our architecture ensures absolute signal integrity.
| Processing Stage | Technical Advantage & Function |
|---|---|
| The Signal Foundation | Utilizes the renowned Veronica® 1W Exciter. This PLL-driven foundation prevents frequency drift and ensures a super-low noise floor for professional carrier integrity. |
| Internal Audio Chain | Includes an Internal Stereo Coder for wide separation and a Dynamic Audio Processor. These boards apply precise limiting and compression to deliver a 'loud and crisp' commercial sound. |
| Professional Bypass | Engineered for flexibility. The internal limiter and stereo coder can be completely disabled to accommodate external processors such as Orban, Inovonics, or PC-generated MPX/RDS signals. |
| Chief Engineer Control | Allows the station's engineering team to maintain their specific 'processing signature' by providing a transparent path for the external MPX baseband signal. |
DECLARATION OF CONFORMITY
European Union
We hereby declare that this equipment complies with;
• ETS 300384 European Telecommunications Harmonised Standard when used with an audio compressor limiter supplied and tested by Aareff
• EN 301489-11 V1.3.1 (2006-05) EMC Electromagnetic Compatibility when used with 1 meter AC mains cord supplied. If the installation engineer needs to extend this cord, this and the audio input cable should be no more than 3 meters in length to remain in compliance with EMC directive.
• 2006/95/EC Directive (2006-12) LVD Low Voltage Directive.
Equipment compliance is possible using equipment from and in conjunction from other manufacturers, but since this is beyond the control of Aareff Systems, Aareff Systems cannot or be expected to guarantee compliance in this situation.
United States
The following list are the FCC technical requirements for FM broadcasting. We confirm and verify that this transmitter complies with the technical requirements.
47 CFR Chapter I Federal Communications Commission sections:
• 73.1560, 2.1046 RF Power
• 73.1545, 2.1055 Frequency Stability
• 73.317, 2.1049 (e)(3) Emission Limitation, Emission Mask
• 73.317, 2.1057, 2.1051 Emission Limits, Spurious Emissions at Antenna Terminal
• 73.317, 2.1057, 2.1053 Emission Limits, Field Strength of Spurious Emissions
