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1kW FM Transmitter Stereo DDS with RDS and Audio Processing
- STEREO WITH AUDIO PROCESSING
- DYNAMIC USB/PC CONTROLLED RDS
- DDS FREQUENCY CONTROL
- ROBUST LDMOS RF OUTPUT
- XLR BALANCED INPUT
- INCLUDES SHIPPING + 5 YEAR WARRANTY
- EXCEEDS CE/FCC TECHNICAL SPECIFICATION
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LIMITED WARRANTY |
BUILT BY EXPERTS. GUARANTEED FOR 5 YEARS. MAXIMIZE YOUR COVERAGE TODAY.
This Aareff 1 kW FM Transmitter is engineered for serious broadcasting. It includes every feature necessary for a professional station, from the DDS Exciter and Stereo with Audio Processing to the Dynamic USB/PC Controlled RDS system. High power combined with the right FM antenna (e.g., an 8-bay stacked dipole) and optimal grounding can propel your signal to up to 100km of reliable coverage, making this a formidable 10kW EIRP system. Our 10kW EIRP system is a fine example of this.
Superior Engineering & Compliance.
• Robust LDMOS RF Output: Ensures exceptional durability and performance, allowing the unit to handle high power demands.
• DDS Frequency Control: Delivers rock-solid frequency stability, essential for avoiding drift and maintaining licensed accuracy.
• CE/FCC Technical Specification Compliance: Guarantees that the transmitter meets the highest international broadcasting standards for safety and performance.
• XLR Balanced Input: Professional-grade input eliminates noise, ensuring crystal-clear audio quality.
SIMPLE SETUP: HIGH-POWER TRANSMISSION AND EASY INSTALLATION FOR 1KW SYSTEMS
Installation Designed for Speed and Reliability.
If your objective is achieving massive broadcast distance or deploying sheer brute power necessary to penetrate concrete and steel in densely built-up urban centers, the Aareff 1kW FM Transmitter is your ideal solution.
We have expertly engineered the installation process for maximum simplicity and rapid deployment, ensuring you can power up and start broadcasting as quickly as possible.
Connectors and Setup (Stereo, Audio Processing & RDS Version).
The setup requires minimal equipment: all you need is a quality mixer (and, of course, great radio presenters!).
1. Audio Connection: Connect the output of your mixer directly to the gold-plated RCA inputs located on the back panel of the transmitter's driver unit.
2. Antenna Connection: Connect the transmitter’s 1000W output to a suitable 50 ohm antenna system that is rated to handle 1kW (1000 Watts).
3. Power Up: That's it! Simply switch the unit on. A successful, high-power transmission is confirmed instantly: if you see no reflected power reading on the front panel, you are broadcasting serious power and achieving serious distance.
Which FM Transmitter Version Do You Need?
Selecting the Optimal Version for Your Broadcast Requirements.
Choosing the correct version of your FM Transmitter is crucial for operational efficiency and meeting your specific broadcast goals. We offer professionally engineered systems that cover 90% of customer requirements right out of the box, ensuring you get the exact functionality needed for your station.
These are the two primary, professional versions of our FM Transmitters:
◼ Stereo with RDS and Audio Processing Version
Ideal for: Any station prioritizing high audio quality, professional stereo separation, and dynamic Radio Data System (RDS) functionality for displaying station name, song titles, or slogans. This is the most feature-rich option for modern, professional broadcasting.
◼ MPX Version
Ideal for: Experienced engineers who handle external audio processing and stereo encoding outside the transmitter. This version accepts a pre-processed and encoded composite signal (MPX) for direct modulation, offering maximum control to the audio chain expert.
Need Customization?
We understand that custom requirements exist. If you need alternative versions (e.g., stereo only, no RDS, no processing), we can accommodate these requests to match your specific technical setup.
You will find detailed descriptions of both the Stereo/RDS and MPX versions, including how they work, technical specifications, and the final price INCLUDING delivery to your country, in the following sections.
Contact Our Experts
If you are still unsure, you are always welcome to contact us at em: info@aareff.com or ws: +1 829 6980733 and we're more than happy to advise you.
We are happy to provide personalized technical advice to ensure you choose the system that maximizes your EIRP and operational efficiency.
Do You Have A Question?
Stereo, RDS, and Audio Processing Version: The Ultimate All-in-One FM Broadcast Solution
Optimal Performance & Compliance: Why Choose This Version?
If you're seeking a transmitter that balances powerful broadcasting with strict legal compliance, this version is your definitive choice. It eliminates complexity for both new and experienced broadcasters.
• Beginner-Ready: The unit features automatic audio level adjustment, ensuring your 1000 watt transmitter always adheres to state regulator specifications. Start broadcasting legally and effortlessly.
• Professional-Grade: Ideal for experienced users who prioritize efficiency. It includes everything in one single enclosure, minimizing setup time and cable clutter.
Intelligent Audio Processing for Maximum Reach
Our internal audio processors are engineered to give you a competitive edge:
• The processing keeps the audio level LOUD—allowing your station to compete effectively with others on the dial.
• Crucially, it prevents over deviation, ensuring your powerful signal remains legal and compliant with all permit requirements.
• This version perfectly executes the delicate balance of maximum loudness while maintaining a legal signal.
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The audio inputs industry standard 600 ohm +4 dBu balanced using XLR connectors.
In addition, this version INCLUDES RDS. This allows everybody to see your station name and more scrolling across the car radio display.
The 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 RDS can be changed on the fly in real time by using USB PC CONTROL shown below.
Flat 30Hz to 76KHz MPX Input: Precision for High-End Audio Processors
Expert Integration: MPX Input for External Audio Processing
This feature is tailored for expert broadcasters who utilize external, high-performance audio processors to feed the MPX signal.
1. Zero-Tilt Baseband
• The baseband MPX audio input boasts virtually no tilt on the critical low bass frequencies.
• This perfect flatness is essential for optimal integration with professional multiband processors, including Orban, Inovonics, Stereo Tool, and Omnia.
2. Ultra-Stable PLL and VCO Technology
Superior low-frequency response is driven by cutting-edge technology:
• Slow PLL Loop: The Phase-Locked Loop (PLL) is extremely slow, maintaining low-frequency performance down to just a few Hertz—a critical requirement for high-end processors.
• Stable VCO: This stability is achieved using a Hartley loosely coupled Push-Pull Voltage Controlled Oscillator (VCO). It is so stable that it remains within 10kHz of its tuned frequency even with the Digital Synthesis System (DSS) and PLL disabled.
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Performance Result: Low Noise, Clean Audio
The extreme stability of the VCO means the PLL only needs to provide a minimal frequency correction (less than 300Hz).
• Benefit 1: Low Noise Audio. Minimal PLL effort translates directly to a cleaner, low noise audio signal.
• Benefit 2: Pristine Low-Frequency Response. A super slow low-frequency loop filter cleans the PLL correction, ensuring the crucial low-frequency audio at 30Hz passes through the varicap completely unaffected. This results in the cleanest low-frequency audio response essential for high-performance processing.
Professional FM Antennas & Complete Broadcast Packages
This high-performance transmitter is designed for maximum flexibility. It will operate flawlessly with any 50 ohm antenna rated for 1000W or higher.
We offer a range of perfectly matched antennas optimized for different coverage needs:
• Vertical 5/8 Wave: Ideal for single-bay, long-distance ground wave coverage.
• 4 Way Stacked Dipole: Provides excellent gain and pattern control for medium-power applications.
• 8 Way Stacked Dipole: High-gain solution for maximizing Effective Radiated Power (ERP).
• Circular Dipole: Best for areas requiring mixed horizontal and vertical polarization.
• Folded Dipole: Robust, wide-band option suitable for various environments.
Our 2.5kW, 5kW and 10kW EIRP packages include this transmitter packaged in with coaxial cable and a suitable antennas. These full systems are professionally engineered to ensure complete compliance with EU standards and regulations for licensed broadcasting, as well as the requirements of most other countries worldwide.
Extreme Temperature Resilience: 24/7 Continuous Performance
- Field-Proven Durability
This unit is engineered for the world's most demanding environments. The original design was successfully deployed in East Africa five years ago and remains fully operational 24/7, enduring intense, continuous heat.
1. Non-Stop Power: Delivers a continuous 1kW power output day and night, 365 days a year.
2. Extreme Heat Tolerance: Designed to maintain full functionality even in the harsh conditions of high ambient temperatures.
- Intelligent Protection and Auto-Recovery
Our advanced protection system ensures the longevity and safety of your investment, providing automatic fail-safes without abrupt disruptions.
1. Over-Temperature Protection:
• Trigger Condition: Internal temperature exceeds 70C (e.g., ambient >40C).
• Safety Action: Gentle RF Power Back-Off (soft, gradual reduction to avoid abrupt cuts).
• Auto-Recovery: Yes, automatically restores full power when the internal temperature returns to a safe level.
2. Reflected Power Protection:
• Trigger Condition: High VSWR detected (typically indicating an antenna or cable fault).
• Safety Action: Power Reduction to Safe Level to prevent damage to the output stage.
• Auto-Recovery: Yes, automatically restores full power once the fault (high VSWR) is cleared.
Benefit: In the event of any fault (high temperature or antenna damage), the power is safely reduced to prevent damage. Once the condition is resolved, the unit automatically restores full power, minimizing station downtime.
VSWR Resilience & Extreme Ruggedness: Featuring the BLF188XR
The heart of this model's final output stage is the BLF188XR LDMOS RF power transistor. The 'XR' designation stands for 'eXtremely Rugged,' signifying its design for the most demanding engineering environments.
• Extreme Load Mismatch Handling: The BLF188XR is capable of withstanding a severe load mismatch with a Voltage Standing Wave Ratio (VSWR) greater than 65:1 at 5 dB of compression. This ensures unparalleled resilience against real-world antenna failures and system faults.
• Peak Power Capability: While engineered for ultra-reliability, this transistor is demonstrably capable of providing an outstanding 1600 W of peak output power while still passing extreme ruggedness testing.
• Optimized Operating Parameters: For maximum system longevity and ultra-reliability, we operate this final stage conservatively at a maximum output power of 1 kW.
• Flexible Power Management: The system offers exceptional flexibility, allowing power levels to be precisely set from the maximum 1 kW all the way down to 10 W for various operational needs.
Robust Construction & Professional-Grade Enclosure Design
This 1 kW FM transmitter system is engineered for exceptional durability and rack compatibility, ensuring reliable performance in demanding environments.
• Enclosure Configuration: The complete system is housed in a robust, dual-enclosure setup:
- 1 x 3U Enclosure
- 1 x 2U Enclosure
• Material and Durability: Utilizing heavy-duty 16-gauge steel, the metalwork is designed to meet or exceed the requirements for high-stress, military-grade operational settings.
• Finish and Protection: The enclosures feature a professional, satin black, baked-on powder coating. This finish provides a highly scratch-resistant surface, effectively preventing the exposure of bare metal and safeguarding against long-term corrosion.
• Rack Compatibility: All front panels adhere to the industry-standard 19-inch width, ensuring seamless integration into all professional equipment racks.
Configuring Power, Dev. and Freq.
Achieving accurate and compliant broadcasting is made simple with the FM Transmitter's integrated tuning features.
Effortless Parameter Adjustment
The three essential broadcasting parameters are designed for easy and precise user setting:
This design guarantees maximum flexibility and simple on-site configuration for any broadcasting requirement. More information on this in the User Manual, you can find a link to this below.
• Operating Frequency (FM Channel)
• Output Power Level (Fine-tuning the 1W output)
• FM Deviation (Modulation depth)
These settings are adjusted via accessible controls on the underside panel. The process is simplified by the inclusion of an integral frequency counter, which allows for real-time visual confirmation and high-precision tuning of your broadcast signal.
For comprehensive, step-by-step guidance on utilizing the integral frequency counter and setting up the underside panel controls, please refer to the official User Manual in the link below..
Compliance
The stereo version with audio processing and limiting meets all the regulatory standards required out of the box and pre configured. In fact if you send us a copy of your permit and it's conditions, we will set it up exactly to the specification. This equipment complies with EU/CE harmonised standards and FCC technical requirements for FM broadcasting. More information HERE
RF Specification
All stated measurements were made at 220VAC at 27 Deg. Celsius ambient temperature unless stated.
| Power Output | Adj. 1-1000 Watts into 50 ohms |
| Spurious Emissions | Less than -75 dB ref to carrier |
| Harmonic Emissions | Less than -70 dB ref to carrier |
| Freq Stability | +/- 1 KHz max. typ. +/-300 Hz |
| Deviation Sensitivity Stability | +/-2 % max |
| Freq Fine Adj | > +/- 1000 Hz |
| Freq Range | 87.5 to 108 MHz in 100 KHz steps |
| Out of Lock RF Muting | Less than -70 dB ref to carrier |
| Residual AM | Less than 0.5 % |
| Synchronous AM | Less than 0.5 % |
| RF Ruggedness | Any VSWR phase or length of time |
| Output Connector | DIN-716 |
| Operating Temp | -20 to +40 Deg C |
AF Specification
| Pre-emphasis | (50 uS/ 75 uS/ None) Selectable | |
| Audio Input Connector | XLR True Balanced 600 ohm No Ground Ref./ Floating | |
| Audio Input Sensitivity | +4 dBu for +/- 75 KHz dev. | |
| Version | MPX | Stereo and Audio Processor |
| Signal To Noise Ratio | 80dB | 65dB |
| Frequency Response | 30Hz-76KHz | 30Hz-15KHz |
| Audio Distortion | Better than 0.1% / 60dB THD | Better than 0.1% / 60dB THD |
AC Specification
| Input Voltage | 90-264 V AC 135-370 V DC 47-63 Hz |
| Input Power | 1400W for 1000W RF OUT with RF SWR less than 1.5 |
| Working Humidity | 20-90% RH non-condensing |
| Safety Standards | UL60950-1 TUV EN60950-1 BSMI CNS14336 CCC GB4943 J60950-1 approved |
| EMC Emission | Compliance to EN55022 class B EN61000-3-2 3 FCC PART 15 / CISPR22 class B CNS13438 class B GB17625.1 |
| EMC Immunity | Compliance to EN61000-4-2 3 4 5 6 8 11 light industry level criteria A |
An incorrect antenna and /or bad feeder cable connections can cause RF burns and levels of RF exposure above the recommended limits for personnel
Do not adjust any factory set internal controls.