250w vhf fm transmitter system with 4 way stacked dipole
Contents
1. AAI OH Om ome O COMO OOme TRANSMISSION SYSTEMS 250W VHF FM TRANSMITTER SYSTEM WITH 4 WAY STACKED DIPOLE SARETE 125 WATT AMPLIFI AAREFT ee ee MARCAS DON SYST ONES 125 WATT AMPLIFIER AAREFT PARES SION TVS s e s m s m End ON EVE TEMAS AAREFF SYSTEMS LIMITED UK O 2013 email info aareff com web www aareff com MARISA Om OM CNO 000 oomo TRANSMISSION SYSTEMS INTENDED USE 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 of the EU member state be EMC aware and Li The installer must have competent RF engineering skills at their disposal 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 gt Oa Dx tamme PACKAGE CONTENTS 1 x STEREO CODER AUDIO LIMITER 1 WATT FM DRIVER EXCITER 13 8V DC ALSCB 1WPLLB 1 x DISTRIBUTION AMPLIFIER 4WDA109 2 x 125W FM POWER AMPLIFIER 125WNTAP 2 x DC LEAD TO DC LEAD DC CONNECTIONS FROM ALSCB TO 1WPLLB TO DISTRIBUTION AMPLIFIER 1 x MPX AUDIO LEAD AUDIO CONNECTION FROM ALSCB TO 1WPLLB 3 x BNC TO BNC LEAD RE CONNECTION FROM 1WPLLB TO DISTRIBUTION AMPLIFIER TO 2 x 125WNTAP 1 x 13 8V DC SWITCH MODE AC POWE2. 2 max Better than 75dB ref to carrier Better than 70dB ref to carrier 200 KHz S0239 Any VSWR 100 KHz 40 dB rte or optional N type any phase any length of time OdBu 775 mV rms adjustable Phono RCA socket Better than 30 Hz to 15 better than 35 dB 50 us 19 KHz 0 2 Hz Vertical 6 dB 75uS 70 dB KHz 0 1 USA 0 5 dB at 75 KHz dev or None 2 dB 50m LMR400 foam cable AAREFF SYSTEMS LIMITED UK 2013 email info aareff com web www aareff com MME STACKED DIPOLE ANTENNA IMPORTANT PLEASE READ INSTRUCTIONS The antenna is the most important part of the transmission system and must be correctly installed before proceeding further and before any transmission equipment is connected Ideally this antenna should be mounted 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 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 m Several European countries use a value for the power flux density of 10 W m 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 gro
3. D DIPOLE IS AT THE BOTTOM NEXT UP YELLOW NEXT UP RED AND AT THE TOP THE YELLOW DIPOLE 3 THE 50M CABLE LENGTHS ARE NOT CHANGED IF YOU NEED TO EXTEND THE ANTENNA CABLES READ THE FOLLOWING CAREFULLY THIS WILL WORK PERFECT It is important that the signals from the FM power amplifiers arrive at each dipole at exactly the same time this can only happen if the LMR400 cables from each power amplifier to each junction box are the exactly the same length It does not matter how long the cables are how many cables you use or how many joins are used to connect the cables together All that matters is that the total lengths of cable are exactly the same In practice we have found that a difference or tolerance of up to 2 cm between each cables is acceptable this gives a 2 to 3 degree tilt error up or down in the direction of the horizon any more than this and the loss of Signal to the horizon will become noticeable THIS WILL NOT WORK If you choose to connect any random lengths to extend the cables or lengths that have not been properly and accurately measured to be identical then the signals will arrive at the dipoles at different times and this will cause a cancellation effect to the combined Signal in the air 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 The only way to measure the cables accurately is to lay them ou
4. R SUPPLY 4 0 AMP 3 x IEC AC CORD 12 x M6 SCREW NUT AND WASHERS 2 x 19 INCH 3 x 2U CLAMPING BARS 2 x 2 WAY STACKED DIPLOE HIGH POWER ANTENNAS 2 x 50 METERS LMR400 CABLE WITH PLUGS FITTED AAR Om Om Ome O Come Come TRANSMISSION SYSTEMS Before the transmitter and limiter can be used AARI Om om Ome 000 COMO TRANSMISSION SYSTEMS PRE INSTALLATION Power Supply Power Amplifier RF Power Output Freq Stability Freq Range Freq Adj Accuracy Deviation Sensitivity Stability Spurious Emissions Harmonic Emissions RF Bandwidth Output Connectors RF Ruggedness Audio Audio Audio Audio Audio Freq Input Sensitivity Inputs Connector S N Ratio Response Distortion Stereo Crosstalk Pre emphasis Pilot Tone Pilot Tone Freq Stability Antenna Polarisation Antenna Gain Antenna Cable Loss 90 260 2 x 125 Watts Better than 2 KHz from 20 to 40 Deg C it is necessary that the two tuned dipole antennas with the LMR400 50 ohm coaxial cable are installed Please ensure that all antenna connections are sound this is important as poor connections and soldered joints will cause severe noise to the transmission and will use excessive RF bandwidth IMPORTANT ABOUT THE ANTENNA SYSTEM SYSTEM SPECIFICATIONS 25 PLEASE READ THE NEXT PAGE THOUGHLY VAC 50 60 Hz O Watts Total 0 5 dB from 20 to 40 Deg C 300 Hz typ 100 KHz steps from 87 5 to 108 MHz 50 Hz
5. ables to the centre of each of the two 3 way junction boxes MAKE SURE THE CONNECTORS ARE SCREWED PROPERLY AND TIGHT Wrap PVC or self amalgamating tape tightly around and all over the connectors to make them water resistant 5 IMPORTANT DO NOT CUT BACK ADD OR CHANGE THE ANY OF THE 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 6 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 7 Make sure that all fixings are tight and are not going to work loose over time with wind 8 On completion of the antenna installation you should have 2 x 50m cables ready to plug into each of the large RF power amplifiers AAREFF SYSTEMS LIMITED UK 2013 email info aareff com web www aareff com ABE STACKED DIPOLE ANTENNA IMPORTANT DO NOT SHORTEN LENGTHEN OR CHANGE THE LENGTH IN ANYWAY TO THE 50M LENGTHS OF THE SUPPLIED ANTENNA CABLE FOR THIS SYSTEM TO WORK CORRECTLY AND GIVE 1600 WATTS 1 6 KW ERP TO THE HORIZON IT IS VERY IMPORTANT THAT 1 THE ANTENNAS ARE MOUNTED STRAIGHT IN A VERTICAL LINE WITH EACH OTHER AS SHOWN IN THE DIAGRAM 2 THE RE
6. hese leads as they are a specific phased length It is okay to coil and cable restrain them to make the arrangement tidier 2 Using the two leads supplied terminated with 1259 AMPLIFIER BNC connectors connect the 1W input from each power amp to the 1W driver outputs 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 There is a 15V DC adapter Plug the adapter into the ALSCB DC INPUT Then connect the ALSCB DC TO OTHER EQUIPMENT to IWPLLB DC INPUT using the short red and black DC cable Then connect the 1WPLLB DC AUX OUT to Distribution Amplifier using the short red and black DC cable Then connect the AC mains power to the adapter no cao me Ju EL AARE E MODEL z Be o som som ALSCB 4 Turn on the mains power to all units The driver will lock after a few seconds and power amps should indicate power on the front panel meters The switch on the front panel of the power amplifiers should be set to FWD 5 Provide an audio input to the ALSCB Stereo Generator and Limiters and you are on air MAINFAN TO ANTENNA 1WATTINPUT KEEP FAN VENTS CLEAR ALWAYS KEEP THE VENTS AND FANS CLEAR MAINFAN O TO ANTENNA 1 WATT INPUT KEEP FAN VENTS CLEAR AAREFF SYSTEMS LIMITED UK O 2013 email info aareff com web www aareff com
7. mer 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 AAREFF SYSTEMS LIMITED UK 2013 email info aareff com web www aareff com
8. t side by side on a flat road side walk or similar With a person at each end pull them tight and cut them exactly equal with each other then fit the plugs If you fit a plug incorrectly you need to repeat the process by cutting both again ij 2 x ANTENNA CABLES LMR400 TO 2 x POWER AMPLIFIERS AAREFF SYSTEMS LIMITED UK O 2013 email info aareff com web www aareff com 1 9 METERS 1 9 METERS 1 9 METERS 0 65 METERS YELLOW RED YELLOW RED emo BASIC CONNECTION SET UP Arrange the units as shown in diagram to the left Use the supplied M6 screws nuts washers and drilled bars to clamp the 2U 19 inch driver and 2U 19 inch power amplifier 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 1WPLLB ALSCB Alternatively you can mount the units in a professional 19 inch enclosure and integrate the units with other equipment that you supply Arrange the units as shown in the picture above The picture shows the view of the rear panels It is self explanatory from the rear panel where the power supplies plug in DO NOT plug in the power supplies at this stage 1 Connect the output from each power amp to the two 50m cables coming down from the dipole antennas If you find that the cables are longer than necessary DO NOT shorten t
9. tite REGULATORY ISSUES EQUIPMENT COMPLIANCE This system is Lg designed and tested to comply with the European Harmonised Standard for Telecommunications ETS 300384 when used as shown in this document It is generally considered and accepted that harmonized standards reflect state of the art performance and a presumption of conformity LL designed to be compliant throughout its useful working life of typically 5 to 10 years iiia not for use by the unqualified general market consumer iv specifically designed and only intended for installation by an engineer with other similar apparatus in a fixed installation at a permanently pre defined location ROHS 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 Polybrominated Diphenylethers PBDE s PRODUCT END OF LIFE 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 LEGAL ADVICE It is the custo
10. und level or within a few meters of personnel ANTENNA PACKAGE CONTENTS CHECKLIST Dipole YELLOW marked cable 53 cm RG59 cable Dipole RED marked cable 53 cm RG59 cable 65cm radiator rods Bolt wing nut and plastic spacer RF connector 3 way Junction box Mast fixing clamp 20 x Cable ties 2 x 50m Antenna Cable Phased Lengths Es N 00 O HN XXX TO ERECT THIS ANTENNA YOU WILL NEED TO PROVIDE 1 PVC insulation tape and or Self Amalgamating Tape 2 Tape Measure with mm 3 10mm Spanner 4 A secure mounting mast with a diameter of 45 50mm and clear length of at least 8 meters for mounting the dipoles to CONSTRUCTION La Using the 8 x Bolt wing nut and plastic spacer mount the two 65cm rods to each of the dipole terminal boxes make sure they are screwed tight en Mount the 4 dipoles to the mast using the clamps provided It is IMPORTANT for correct operation that the dimensions on the diagram are followed as closely as possible all dipoles must be directly above each other A red dipole should be at the bottom a yellow next up a red again next up and at the top a yellow dipole ALL TERMINAL BOXES MUST BE FACING THE SAME WAY for the system to work properly and give maximum gain to the horizon 3 Mount one of the 3 way junction boxes between the red and the yellow dipole at the bottom Mount the other 3 way junction box between the red and the yellow dipole at the top 4 Connect the 2 x 50m phased LMR400 antenna c
Download Pdf Manuals
Related Search