User Manual and Installation of 2000W (2KW) EIRP System


i. The various pieces of equipment in this document are only for use permanently at a pre-defined location with a license or authorisation from the radio spectrum regulator in your country or EU member state.

ii. The installer must have competent RF engineering skills at their disposal, be EMC aware and understand radio frequency systems. The final installation should be in accordance with the site engineering document at The radio station management must assign a responsible person to the transmission equipment and installation.


1 Stereo coder audio limiter / 1 watt FM driver exciter 15V DC (ALSCB & 1WPLLB)
1 800W FM power amplifier
1 DC to DC Lead (DC connections from ALSCB to 1WPLLB to distribution amplifier)
1 IEC AC power cord
1 MPX audio lead (audio connection from ALSCB to 1WPLLB)
1 BNC to BNC lead (rf connection from 1WPLLB to Distribution Amplifier to a 800WNTAP)
1 15V DC switch mode AC power supply (1W)
1 Rack Rails
1 20m roll of LMR400 antenna cable


All these parts are packed in the carton measuring 17 x 17 x 155 cm (6.75 x 6.75 x 61 inches)

Please go to the 5/8 antenna user manual at to check all the parts have arrived with you. Then carefully follow the instructions there to install the 5/8 antenna. When this is done return here to this document and continue.


When this system was ordered, if a specific frequency was given during the order process, then the system will have been set and factory tested at this frequency. If not, or you need to change the frequency or power level please refer to the user manual for 1W PLL FM STEREO DRIVER / EXCITER WITH AUDIO PROCESSING at

1. Use the supplied M6 screws, nuts, washers and rack rail bars to clamp the Driver (1WPLLB and ALSCB) and the 800W power amplifier together as shown in the picture. The power amplifier is much heavier, so these should be at the bottom. The Driver is light and will suspend in the air and does not need any support at the back.

Alternatively you can mount the units in a professional 19 inch enclosure and integrate the units with other equipment that you have.

2. Connect the 800 WATT RF OUTPUT from the power amplifier to the long LMR400 cable coming down from the antenna assembly.

3. Using the 1m BNC to BNC leads supplied connect the 1 WATT RF INPUT from the power amplifier to the the 1 WATT RF OUTPUT from the 1WPLLB driver / exciter

4. Plug the small 15V DC switch mode AC power supply into the ALSCB DC INPUT. Connect the ALSCB DC AUX OUT to the 1WPLLB DC IN using the short black DC to DC Lead.

5. Using the MPX Audio Lead, connect ALSCB MPX OUTPUT to 1WPLLB MPX INPUT

6. Connect mains AC power to the 800W amplifier. The driver will lock after a few seconds and amplifiers should indicate power on the front panel meters. The switch on the front panel of the amplifier should be set to ‘FWD’.

7. Finally, provide an audio input to the ALSCB Stereo Generator and Limiters and you are "ON AIR".



Power Supply 90-260 VAC 50/60 Hz
Transmitter RF Power Output 800 Watts +/- 0.5 dB from -20 to +40 Deg C
Freq Stability Better than +/- 2 KHz from -20 to +40 Deg C +/- 300 Hz typ.
Freq Range 100 KHz steps from 87.5 to 108 MHz
Deviation Sensitivity Stability +/- 2 % max
Spurious Emissions Better than -75dB ref to carrier
Harmonic Emissions Better than -70dB ref to carrier
RF Bandwidth 200 KHz (+/-100 KHz @ -40 dB rtc)
Output Connector N type 50 ohm
RF Ruggedness Any VSWR any phase any length of time
Audio Input Sensitivity 0 dBu 775 mV rms adjustable
Audio Inputs Connector Phono/ RCA socket
Audio S/N Ratio Better than 70 dB
Audio Freq Response 30 Hz to 15 KHz +/- 0.5 dB
Audio Distortion Better than 0.1 % at +/-75 KHz dev
Stereo Crosstalk 35 dB
Pre-emphasis 50 uS (75 uS USA) or None
Pilot Tone Freq 19 KHz
Pilot Tone Stability 0.2 Hz
Antenna Polarisation Vertical
Antenna Gain 4.8 dBi
Antenna Cable Loss -0.8 dB 20m LMR400 foam cable
Antenna RF Power Output 2010 Watts EIRP +/- 0.5 dB (total system gain +4.0 dBi) from -20 to +40 Deg C using 20m of LMR400 foam antenna cable and the 5/8 wave antenna supplied at 98 MHz


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


All components used in this apparatus are RoHS compliant and do not contain above the specified limits in any of the following restricted substances:

• Lead
• Hexavalent Chromium
• Mercury
• Cadmium
• Polybrominated Biphenyls (PBB's)
• Polybrominated Diphenylethers (PBDE's)


This apparatus must NOT be disposed of with other domestic waste.

We are fully committed to maintaining our responsibilities to the environment. Owners of apparatus that has reached the end of it's useful life can return it to us for recycling, recondition, reuse or proper disposal. You will be required to pay lowest cost postal service available to ship the apparatus to us. Before shipping please contact us for more important information.


It is the customer's responsibility to check relevant laws, directives, regulations and licensing requirements before putting this product into service with an antenna system. You, the customer agree to defend, indemnify and hold harmless Aareff Systems Limited, it's employees and agents, from and against any claims, actions or demands, including without limitation legal and accounting fees, alleging or resulting from improper or unlawful use of this product.


ALL RIGHTS RESERVED. Aareff is a trademark of Aareff Transmission Systems. All contents of this document including, but not limited to the images, logos, text, illustrations are protected by copyrights, trademarks and other intellectual property rights which are owned and controlled by Aareff Transmission Systems or by other parties that have licensed their material to Aareff Transmission Systems. This document in part or whole may not be copied, reproduced, republished, uploaded, posted or distributed in any way, including by e-mail, ftp or any other electronic means

Every care has been taken in the preparation of this document, errors in content, typographical or otherwise, may have occurred. If you have comments concerning its accuracy, please contact Aareff Systems Limited (UK)