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VIMESA PS-2 ADVANCED BROADCASTING FM TECHNOLOGYRELIABILITY, RESILIENCE, SIMPLICITY, ECONOMY
VIMESA PS-2                          BROADBAND FM TRANSMITTER.MODULAR DESIGN:              VIMESA XPT-50 EXCITER (50 W)   ...
POWER AMPLIFIER SPECIFICATIONS                               Mechanical specifications                 Height ...............
POWER SUPPLY:                                  TWO IDENTICAL MAIN POWER SUPPLIES ARE SINGLE                               ...
1 KW POWER DRAWER GENERAL VIEW          FROM LEFT TO RIGHT: 4 POWER SUPPLY, POWER OUTPUT CONTROL          CIRCUITS, 4 OUTP...
TWO OUTPUTS SPLITTER NEXT TO 1 KW POWER                 A    S1 KW POWER DRAWER      4 OUTPUT SPLITTER MICROSTRIP WILKINSO...
1 KW POWER DRAWERS                                          OUTPUT   THE 2 KW COMBINER IS LOCATED ABOVE THE 1   KW POWER D...
RF POWER OUTPUT IS MADE BY MEANS OF ONE                                 7/16” CONNECTOR AT THE CEILING OF 19” RU          ...
THE 1 KW POWER DRAWER CAN BE PULLED OUT FOR     MAINTENANCE WITHOUT TAKING OFF AIR THE POWER DRAWER.     POWER DRAWERS ARE...
DOUBLE EXCITER CONFIGURATION WITHOUT EXTERNAL                            SWITCHING UNIT.            THANKS TO THE USE OF T...
VIMESA PS TRANSMITTERS FAMILY PS 1               PS 2   PS 3   PS 5              PS 101 kW                2 kW   3 KW   5 ...
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Tx 2 kw Vimesa

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Tx 2 kw Vimesa

  1. 1. VIMESA PS-2 ADVANCED BROADCASTING FM TECHNOLOGYRELIABILITY, RESILIENCE, SIMPLICITY, ECONOMY
  2. 2. VIMESA PS-2 BROADBAND FM TRANSMITTER.MODULAR DESIGN: VIMESA XPT-50 EXCITER (50 W) TWO MODULES POWER SUPPLY. 2 x 1 KW POWER DRAWER SERVICEABLE WHILE WORKING. 4 x 250 W POWER AMPLIFIER PER 1 KW POWER DRAWER. 2 KW COMBINER MODULE. MICRO PROCESSED CONTROL. 4 x 40 CHARACTERS DISPLAY.• No need to neither adjust nor tune.• Double power supply easy to service.• Double exciter configuration without external switching unit.• “Fold back“ protection against reflected power excess.• Micro-processed control. The Central Control Unit manages and monitors continuously the transmitter parameters.• 2 x 1 kW Power Drawer..• 4 x 250 W power amplifiers per 1 kW Power Drawer. Individual power amplifiers could be removed while the power drawer continuous working.• The 250 W power amplifiers are independent, interchangeable and can be easily removed from power drawer using a screwdriver, without a soldering iron.• All PS family transmitters uses the same 250 W Power amplifier.• Optional GSM/GPRS remote control.In order to get the maximum reliability and resilience a modular design with optimal redundancyhas been applied.Main building blocks are 250 W power amplifiers and combiner modules.The automatic power control circuits stabilized output power against power supply or powerexciting variations.“Fold back” protection circuits protects against reflected power excess.VIMESA PS2 SHORT GUIDE PAGE 2
  3. 3. POWER AMPLIFIER SPECIFICATIONS Mechanical specifications Height ............................................. 1511,7 mm. (30 RU 19”) Width...................................................................... 580 mm. Depth ..................................................................... 800 mm. Weight.......................................................................180 Kg. Environmental characteristics Operating temperature.................................................0 a 50ºC Maximum relative humidity . . .........................................95 % Maximum operating altitude .to. ..................................3000 m. Electrical specifications Power Supply........................... .220 Vac ± 10%. 50-60 Hz. single phase Max. consumption................................... 4.000 VA for 2 KW. Power output RF Output Power ....................................................500-2000 W. adjustable Frequency range............................................................ 87,5 - 108 MHz Output impedance ................................................................... 50 ohms Output Connector ............................................................. 7/16” female Exciting power ................................................... 20 / 50 W. (model dep.) Input connector ....................................................................... N female Spurious radiations ............................................<-1 mW (tipical -75 dB) AM Modulation.......................................................................... <-50 dB Audio measurements...........................................Transparent respect ............................................................................................ modulatorVIMESA PS2 SHORT GUIDE PAGE 3
  4. 4. POWER SUPPLY: TWO IDENTICAL MAIN POWER SUPPLIES ARE SINGLE PHASE CONVENTIONAL SUPPLIES, WITH A CAPACITY OF DELIVERING 40 A. CURRENT FOR A +48V VOLTAGE. EACH OF THESE SUPPLIES FEEDS A 1 KW. AMPLIFIER MODULE.. ALL ITS COMPONENTS ARE WIDELY OVER DIMENSIONED. EACH OF THEM IS BASICALLY MADE UP OF A MAIN TRANSFORMER, A FULL WAVE RECTIFIER AND A C - L - C FILTER, WHICH GUARANTEES THE SPECIFIED LEVEL OF AM NOISE THE VIMESA XPT 50 EXCITER IS USED . DOUBLE EXCITER CONFIGURATION CAN BE MADE WITHOUT EXTERNAL SWITCHING UNIT THE EXCITER OUTPUT IS DIVIDED BY TWO SAME POWER SIGNAL, AND DISTRIBUTED BETWEEN THE TWO 1 KW INPUT DRAWERS THE DIVIDER IS A RF POWER SPLITTER NETWORK BUILT IN MICROSTRIP TECHNOLOGY, THAT SPLITS THE EXCITER’S OUTPUT POWER BETWEEN THE TWO 1 KW. POWER DRAWERS WITHOUT CAUSING ANY PHASE OR AMPLITUDE ALTERATION.VIMESA PS2 SHORT GUIDE PAGE 4
  5. 5. 1 KW POWER DRAWER GENERAL VIEW FROM LEFT TO RIGHT: 4 POWER SUPPLY, POWER OUTPUT CONTROL CIRCUITS, 4 OUTPUT SPLITTER, 4 x 250 W POWER AMPLIFIERS, 4 FILTERS, 4 x 250 W INPUTS COMBINER AND 1 KW OUTPUT. SPLITTER 4 x 250 W FILTERS 1 KW COMBINER CONTROL CIRCUITS AMPLIFIERSAUTOMATIC POWERCONTROL CIRCUITS ANDREFLECTED FOLDBACK PEREACH 250 W AMPLIFIER VIMESA PS2 SHORT GUIDE PAGE 5
  6. 6. TWO OUTPUTS SPLITTER NEXT TO 1 KW POWER A S1 KW POWER DRAWER 4 OUTPUT SPLITTER MICROSTRIP WILKINSON 4 x 250 W AMPLIFIERS MOUNTED ON COOPER PALLET. USES RF MOSFET-T POWER TRANSISTOR ABLE TO DELIVERY MORE THAN 25O W OUTPUT POWER. DIRECT FORWARD AND REFLECTED POWER CONTROL CIRCUITS ARE BUILT. TEMPERATURE SENSOR CLOSE TO TRANSISTOR MONITOR ITS TEMPERATURE 7th A LOW-PASS FILTER REDUCES THE LEVEL OF HARMONICS. THERE IS ONE FILTER PER EACH 250 W POWER AMPLIFIER. 4 INPUTS LOW-LOSS MICROSTRIP WILKINSON COMBINER, WHICH INCORPORATES ITS OWN BALANCING RESISTANCES IN CASE OF BREAKDOWN OF ANY OF THE 250W POWER AMPLIFIER. ALLOWS THE REMAINING AMPLIFIERS TO CONTINUE WORKING CORRECTLY FOR AN INDEFINITE PERIOD OF TIME VIMESA PS2 SHORT GUIDE PAGE 6
  7. 7. 1 KW POWER DRAWERS OUTPUT THE 2 KW COMBINER IS LOCATED ABOVE THE 1 KW POWER DRAWERS IT IS A WILKINSON COUPLER THAT RECOMBINE EACH ONE OF THE POWERS DELIVERED BY THE TWO 1 KW POWER DRAWERS IN ORDER TO DELIVER AN OUTPUT POWER OF 2.000W 2 KW COMBINER INPUTS 2 KW OUTPUT GOES THROUGH A DIRECTIONAL COUPLER BEFORE REACHING THE OUTPUT CONNECTOR. IN THE DIRECTIONAL COUPLER, RF DIODES PROVIDES CONTINUOUS VOLTAGE INDICATIONS OF FORWARD AND REFLECTED POWER TO THE CONTROL UNIT AND OTHER MEASUREMENT EQUIPMENTVIMESA PS2 SHORT GUIDE PAGE 7
  8. 8. RF POWER OUTPUT IS MADE BY MEANS OF ONE 7/16” CONNECTOR AT THE CEILING OF 19” RU FRAME. REFRIGERATION IS FORCED BY MEANS OF A EXTRACTOR FAN AT THE CEILING AND 5 BLOWERS WORKING CONTINUOUSLY. THE NECESSARY FLOW OF FRESH AIR IS CHANNELLED THROUGH THE HEATSINK OUTLETS INSIDE EACH 1 KW POWER DRAWER, THE FOUR 250 W POWER AMPLIFIERS ARE FIXED BY 4 SCREWS ON A BIG HEATSINK.2 BLOWERS BEHIND 1 KW POWERDRAWERS; ASSURE THE NECESSARYFLOW OF FRESH AIR THROUGH THEHEATSINK OUTLETS. THE CENTRAL CONTROL UNIT IS IN CHARGE OF: • EXECUTION OF LOCAL OR REMOTE CONTROL ORDERS • AUTOMATISM EXECUTIONS • PROTECTION OF THE TRANSMITTER • MANAGEMENT OF SERIAL CONTROL BUS • SYNCHRONOUS COMMUNICATIONS PORT IT ALSO DEALS WITH EXTERNAL INTERFACE CIRCUITS,: INHIBITION CIRCUITS, REMOTE AND CONTROL MONITORING, VIMESA PS2 SHORT GUIDE PAGE 8
  9. 9. THE 1 KW POWER DRAWER CAN BE PULLED OUT FOR MAINTENANCE WITHOUT TAKING OFF AIR THE POWER DRAWER. POWER DRAWERS ARE ACCESSIBLE FROM THE FRONT OF FRAME. ARE MOUNTED OVER GUIDES TO MAKE EASY THE EXTRACTING AND INSERT. ALL THE WIRING IS THROUGH CORD PLUGS, WHICH MAKE CHECKING, REPLACEMENT, CLEANING OR REPAIR MUCH FASTER AND EASIER. ONCE PULLED OUT THE 1 KW POWER DRAWER, THE 250 W POWER AMPLIFIER PALLETS CAN BE REMOVED EASILY USING A SCREWDRIVER (WITHOUT THE SOLDERING IRON) AND USING A SCREWDRIVER) WHILE THE REST OF 250 W POWER AMPLIFIER ARE WORKING.VIMESA PS2 SHORT GUIDE PAGE 9
  10. 10. DOUBLE EXCITER CONFIGURATION WITHOUT EXTERNAL SWITCHING UNIT. THANKS TO THE USE OF TWO VIMESA XPT 50 EXCITERS WITH AUTOMATIC SWITCH OVER OPTION, THERE IS NOT NEED TO USE AN EXTERNAL SWITCHOVER UNIT. AS THE VIMESA XPT 50 PROVIDES 50 W POWER OUTPUT, THERE IS NOT NEED TO USE EXTERNAL EXCITERS.. THEREFORE, THE PS 2 WITH DOUBLE EXCITER PROVIDES AN OPTIMAL REDUNDANCY. .VIMESA PS2 SHORT GUIDE PAGE 10
  11. 11. VIMESA PS TRANSMITTERS FAMILY PS 1 PS 2 PS 3 PS 5 PS 101 kW 2 kW 3 KW 5 KW 10 KW VIMESA (VIDEO MEDIOS S.A.) C/ BATALLA DEL BRUNETE, 48 POLÍGONO INDUSTRIAL CODEIN More information: 28946 FUENLABRADA MADRID –SPAIN- Tel.: +34 91 606 8870 e-mail: vimesa@vimesa.es www.vimesa.es VIMESA PS2 SHORT GUIDE PAGE 11

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