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 http://www.aareff.com/ETR132.pdf 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||Distribution amplifier 15V DC|
|2||200W FM power amplifier|
|2||DC to DC Lead (DC connections from ALSCB to 1WPLLB to distribution amplifier)|
|3||IEC AC power cord|
|1||MPX audio lead (audio connection from ALSCB to 1WPLLB)|
|3||BNC to BNC lead (rf connection from 1WPLLB to Distribution amplifier to 2 x 200WNTAP)|
|1||15V DC switch mode AC power supply (60w)|
|2||Dipole antenna boom and balun/ transformer|
|4||62cm radiator rods (for 98 to 108 MHz)|
|4||70cm radiator rods (for 88 to 98 MHz)|
|4||Bolt, wing nut and plastic spacer|
|2||Mast fixing clamp|
|2||20m rolls of LMR400 equal phased antenna cable|
Ideally this antenna should be mounted at least 20 meters high and clear of any surrounding objects to get maximum range and more importantly to reduce risk of radio frequency radiation to personnel. When mounted at least 20 meters in height off ground and using 400 watts of transmitter power, power flux density measurements made at ground level directly under the antenna show less than 1 W/m2. Several European countries use a value for the power flux density of 10 W/m2 as a basis for considering whether or not an area is safe. The issue of radio frequency radiation limits is a contentious one and work in this field is continuing worldwide. Under no circumstances should the antenna be mounted and used at ground level or within a few meters of personnel.
|PVC insulation tape and/or Self Amalgamating Tape|
|Tape Measure with mm|
|A secure mounting mast with a diameter of 25-37 mm and clear length of at least 4 meters for mounting the dipole antennas to.|
1. Select the correct radiator rods for your frequency, MAKE SURE YOU SELECT THE CORRECT FREQUENCY RANGE. Using the 4 x Bolt, wing nut and plastic spacer mount them to the dipole terminal boxes, make sure they are screwed tight.
2. Mount the 2 tuned dipoles to the mast using the clamps provided. It is IMPORTANT for correct operation that the dimensions on the diagram below are followed as closely as possible, both dipoles must be directly above each other and BOTH TERMINAL BOXES MUST BE FACING THE SAME WAY for the system to work properly and give maximum gain to the horizon.
3. Connect the 2 x 20m equal phased antenna cables to each dipole lead, MAKE SURE THE CONNECTORS ARE PROPERLY SEATED, SCREWED FULLY AND TIGHT. Wrap PVC or self-amalgamating tape tightly around and all over the connectors to make them water resistant.
4. REALLY IMPORTANT! DO NOT CUT BACK, ADD OR CHANGE THE 2 ANTENNA CABLE LENGTHS. To get maximum radiation to the horizon it is important that the signal from each amplifier to each dipole arrives at exactly the same time, this can only happen if the cables are exactly the same length.
5. Securely fix the 2 cables using PVC tape or large cable ties to the mast as shown in the diagram. Make sure the cables are not going to flap around in the wind. Once again, do not cut back any excess cable. To make the cabling look tidy, it is okay to coil the cable.
6. Make sure that all fixings are tight and are not going to work loose over time with wind.
7. On completion of the antenna installation you should have 2 x 20m cables ready to plug into each of the large RF power amplifiers.
1. THE CORRECT RODS ARE FITTED, THE RODS ARE LABELED 88-98 OR 98-108
2. THE ANTENNAS ARE MOUNTED STRAIGHT VERTICAL AS SHOWN IN THE DIAGRAM
3. THE ANTENNAS ALL LINE UP WITH EACH OTHER
4. THE LENGTHS OF THE 20M ANTENNA CABLES SHOULD NOT BE CHANGED IN ANY WAY
If you need to extend or change the antenna cables, please refer to the section near the end of this document "MODIFYING ANTENNA CABLE LENGTHS"
This system is ordered, supplied and delivered for a specific frequency. If 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 http://www.aareff.net/1wpllsl19
Use the supplied M6 screws, nuts, washers and rack rail bars to clamp the Distribution Amplifier (4WDA19), the Driver (1WPLLB and ALSCB) and 200W Power Amplifier together as shown in the photo. The power amplifiers are much heavier, so these should be at the bottom. The Driver and Distribution Amplifier are light and will suspend in the air and do 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.
1. Connect the 200W TO ANTENNA output from each power amplifier to the two 20 meter cables coming down from the dipole antennas. If you find that the cables are longer than necessary, DO NOT shorten these leads as they are a specific phased length. It is okay to coil and cable restrain them to make the arrangement tidier.
2. Using two of the 1m BNC to BNC leads supplied connect the 1W INPUT from each power amplifiers to two of 1W outputs on the Distribution Amplifier. The remaining two spare 1W output on the Distribution Amplifier are left unconnected. You will find that the supplied leads are longer than necessary, DO NOT shorten these leads as they are a specific phased length. It is okay to coil and cable restrain them to make the arrangement tidier.
3. Plug the small 15V DC power supply adapter into the ALSCB DC INPUT. Connect the ALSCB DC AUX OUT to the 1WPLLB DC IN using the short black DC to DC Lead. Connect the 1WPLL DC AUX OUT to the Distribution Amplifier 4WDA19 using the short black DC to DC Lead. Then connect the AC mains power to 15V power supply adapter.
4. Connect mains AC power to the two Power Amplifiers. The driver will lock after a few seconds and Power Amplifiers should indicate power on the front panel meters. The switch on the front panel of the Power Amplifiers should be set to FWD. If the Power Amplifiers have a problem starting up, remove the AC from the 15V power supply adapter for 5 seconds and then re-apply it, this will give it a clean start and the Power Amplifiers should power up.
5. 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||2 x 200 Watts (400 Watts Total) +/- 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|
|Freq Adj. Accuracy||+/- 50 Hz|
|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 Connectors||SO239 (or optional N type)|
|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 Gain||+4.8 dBi|
|Antenna Cable Loss||-0.8 dB 20m LMR400 foam cable|
|Antenna RF Power Output||1005 Watts ERP +/- 0.5 dB from -20 to +40 Deg C using 20m of LMR400 foam antenna cable and stacked dipole supplied.|
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.
This equipment has not been independently tested by an FCC recognised listed laboratory and for this reason the whole system is not certified. The following list are the technical requirements for the certification of this transmitter. We confirm 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
This is when the lengths of the antenna cables from each of the power amplifier RF outputs to the antenna junction boxes are different lengths.
In this situation signals will arrive at the dipoles at different phases and this will cause a cancellation effect to the combined signal. In worst case the signal gain to the horizon could disappear completely. In best case some of the signal will be radiated, but it will be very poor and inefficient.
This system is supplied with two identical antenna cable lengths that are phased matched perfectly. If for some reason you need to extend these cables, this can be done, but in the end result they must still be exactly the same length for the antennas to work correctly.
It is important that both signals from the two amplifiers arrive in phase. This can only happen if the total lengths of each of the cables from the power amp connectors to the dipole junction boxes are exactly the same length.
It does not matter how long the cables are, how many cables you use or how many couplers are used to connect the cables together, all that matters is that the total lengths are exactly the same. In practice we have found that a difference or tolerance of up to 2 cm between each cables is acceptable, but no more than this or the signal will not give maximum gain to the horizon.
All components used in this apparatus are RoHS compliant and do not contain above the specified limits in any of the following restricted substances:
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)