DCE300 - Professional 300W FM Radio Transmitter
Contents
1. RDS ON or RDS OFF for editing the RDS we will explain in the last section of the manual RDS MODE MODE RDS ON The last setup option is the temperature display option you can select between Celsius or Fahrenheit TEMPERATURE MODE MODE CELSIU Getting it on the AIR When you exit the setup menu the DCE300 will start to lock on the desired frequency with the desired power output usually it take about 10 seconds The display should look like this DCE300 ON AiR 108 6MHZ STEREO FHR PWR 25018 REF PWR OL On the display you can see the transmitting freguency the current output power and the reflected power You can return to the setup menu any time by pressing the C button There is also an info menu press B button to enterit this display will show up INFORMATION CENTER PAV 424 PAC 8A DRV 25V PA TEMP 280 You can see here all info about the power supplies and the unit s temperature Using the RDS Install the RDS software supplies with on the CD on a standard PC with a parallel port Connect the RDS cable to the DATA connector on the DCE300 rear panel and the other side to the parallel port on the PC In order to check that the DCE300 connected properly to the PC press Receive button on the RDS software the DEFAULT PS should show RDS which means that the software and DCE300 are communicating Many efforts has been done to make the software user friendly if any guestion oc2. 19 enclosure 2U size Dimensions 430X470mm EXCITER MODULE RF Output Power 1 Watt typical 1 5W MAX Freguency range 87 5Mhz 108Mhz no tune Output Impedance 50 Ohms Output connector SMA Freguency steps 50Khz MPX or SCA input BNC unbalanced 10Kohm impedance Harmonic output lt 55dBc Spurious output lt 80dBc Out of lock RF power down lt 55dB S N R gt 75dB RDS GENERATOR MODULE Operation mode Stand alone Programming with a standard PCLPT port Data storage EEPROM during power off On Off selectable from main LCD display Signal Bandwidth 2 4Khz RDS carrier 57Khz over sampled x 3 2 Conforms to CENELEC EN50067 4 modes of Dynamic Scrolling PS Supports PI PS PTY TPAETA DI M S RT UDG STEREO ENCODER MODULE Sub carrier generation over sampled x 8 Pilot generation 19Khz 2Hz over sampled x16 Stereo separation gt 55dB 20Hz 15Khz MPX output level unbalanced 750hm BNC connector LIMITER MODULE Audio input connector Balanced XLR Input impedance 10Kohm Pre emphasis None 50uS or 75uS Input CMRR gt 65dB Frequency response 20Hz 20Khz AMP300 MODULE RF Output power 250W typical 350WMax Output Impedance 50 Ohms Frequency Range 87 0MHz 108MHz Harmonic rejection 60dB Input voltage 48V 10A DC LPF section Included FEATURES Compact size SMT design Single power supply with onboard voltage regulators Microprocessor controlled with LCD display Excellent audio respons
3. DGE 300 USER MANUAL oon Kiiu gt LA Caution Before any operation please check the operation voltage switch 1101220V at the left side of the transmitter wrong setting of this switch may cause damage to the transmitter AN Fast operation It is strongly recommended to read the entire user manual before operation DCE300 Professional 300W FM Transmitter DCE300 is a state of the art FM transmitter designed to be the core of every radio station Achieving perfect audio quality was our main goal which means that no matter if your FM Package Contents station is 250W or 10kW no compromise should be when dealing with audio quality 1x User manual CD 1x DCE300 transmitter Our engineers with more than 20 years experience in the RF and audio field were 1x RDS cable directed to use the most modern and advanced technology in the market while keeping final product price attractive and competitive and also important plug and play operation The result is even more impressive than planned The Exciter module is on a compact board with over 95 Surface mount technology SMT to improve performance an excellent 1W exciter with a modern PLL and fully digital control with LCD display Audio input chain designed perfectly beginning with a shielded XLR balanced input connector to cancel any interference from noisy RF environment Limiter will limit the modulation to the bandwidth occupation specified by the FCC and international stand
4. ange to deviation level of the RDS MAIN CONTROLLER The main controller of the DCE300 controls the LCD display buttons stereo mono mode PLL programming final RF power switch RDS on off and also monitoring the lock status to power down if out of lock occur due to failure The last frequency used is stored on an EEPROM to save frequency setting as well as RDS and STEREO MONO mode when power is off On power up the controller will make test for the PLL operation will program last frequency from internal EEPROM memory into PLL and wait till frequency lock After frequency lock it will enable the RF power stage and monitor it while waiting for buttons to be pressed MAIN AMPLIFIER The final stage amplifier is an Tugicom AMP300 based on 2XBLF278 by Philips NXP with protected output power of above 250W great stability PWM controlled and Temperature and SWR protected The amplifier gets 1W drive from the exciter and output up to 300W in the 88 108Mhz band with clean spectrum image and contain LPF section Theory of operation Pre emphasis None 50uS 75uS Factory set to 75uS In an FM system the higher audio frequencies are more sensitive to noises than the lower frequencies Because of that all FM receivers attenuate the high audio frequencies in order to cut noise level Therefore a pre emphasis for the higher frequencies is used to compensate the receiver attenuation There are 2 pre emphasis modes used worldwide 75uS U S A J
5. apan and 50uS Europe Africa Australia New Zealand When connecting AUDIO from external audio processor some processors may add pre emphasis adding pre emphasis also by the TX190 will make the audio sound with too much treble because pre emphasis must by applied one time only in this case the pre emphasis on the TX190 need to be set to none to allow external pre emphasis If pre emphasis is set to none instead of 50uS or 75uS a major lack of treble will be noticed In order to set pre emphasis 2 jumpers must be used one for Left channel and one for Right channel Both channels must be set to same pre emphasis When using external MPX signal there is no effect for those pre emphasis settings MPX bypass On Off Factory set On The TX190 has 2 options for MPX input When using the XLR connector to input the audio signal the MPX bypass must be set to On when an external MPX generator is being used MPX bypass must be set to Off and MPX generator should be connected to the MPX IN BNC connector Please take note that setting the bypass to Off position without any external MPX generator will result that no audio will be transmitted even when audio is connected to the XLR inputs STEREO Mode Stereo on Stereo off Mono Factory set to Stereo on This jumper activates or deactivates the stereo pilot tone For stereo broadcast the TX190 broadcast a special pilot tone at 19Khz with 8Khz deviation When jumper is open no jump
6. ards RDS Radio Data System is today a standard module in every radio station a complete RDS module has been integrated inside the DCE300 including all main features of expensive professional stand alone RDS external modules The improved Stereo encoder use a DSP technology with over sampling to ensure excellent performance staring from low distortion accurate channel separation and stable pilot tone An external MPX generator external RDS SCA generator or audio processor can be connected to the MPX IN BNC connector to bypass all internal audio chain At factory default all internal modules the audio chain limiter stereo encoder RDS and 1W PLL exciter module including the final stage Low Pass Filter LPF already connected and tuned for maximum performance without any need for user tuning From the 1W exciter module TX190 the signal goes to the amplifier section that run by BLF278 made by Philips NXP that make 300W output power typical 250W and controlled by the digital controller inside the transmitter The amplifier has also Temperature and SWR protections and has also Low pass filter build in An PWM operation is given by the mean well power supply that is protected also With emphasis of 24 7 operation without any malfunction we are sure that our DCE300 will bring new audio guality for many thousands audiences all over the world SPECIFICATION GENERAL Power Supply MeanWell SE 600 48V 700W 110 220V Size Standard
7. cur please refer to help section in the RDS software IMPORTANT The Send button only sends new configuration but does not store it for next operation In order for configuration to be saved in the non volatile memory the Store button MUST be pressed after Send button MiniRDS Program Dynamic PS Radiotext System Preferences Text Sourc El Help 13 Identification Traffic Settings SF Default PS F Traffic Program Send PI F RDS gt FFFF Traffic Announcement Store Program Alternative Frequencies Decoder Identification Program Type o gt Stereo Receive none v Artificial Head ll Compressed M Dynamic PTY Music Speech MHz EA Thank you for purchasing one of our products Tugicom RF Design Come visit our website for updates and new products www tugicom com Please check the rules in your country before operating radio equipment
8. dummy load or antenna is connected properly power is connected and switched off and audio source is connected to the XLR inputs Turn on the power After switched on the DCE 300 will perform a power up sequence in first time operation the display should show BCE 300 DCE3GG SETUP DLE300 SETUP FIRST TIME OPERATIDI FREG 90 0MHZ MODE STERED SETUP FREG AND PONER POWER 3G0LU MODE ROS ON PRESS KEY FUR SETU BACKLIGHT DELAY TEMP MODE CEL This is the first time we are going to setup the DCE300 with A button you navigate throw setup options such as Frequency Power Output LCD Backlight Stereo Mono RDS setup and Temperature display setup With B buttons you enter the selected setup option and with C Button you can quit the setup menu The first option is the frequency setup enter it by standing with the selected flicker and press B With A and B buttons set the desired frequency that you want to transmit on when you finish press C button to exit the menu SET FREQUENCY SET OUTPUT POWER The third setup option is the backlight of the LCD display the options are ON OFF or DELAY for operate the backlight for only few seconds every time you press one of the buttons LED BACKLIGHT MODE DELAY CHANGE EXIT Next setup options is the audio setup you can select the audio transmitting type MONO or STEREO HONG STEREO MODE MODE STEREO CHANGE EXIT Next setup options is the RDS mode option you can select
9. e Selectable Pre emphasis None 50uS or 75uS Balanced shielded XLR input connectors Audio Limiter Stereo Encoder using a modern DSP technology RDS Radio Data System Excellent VCO with low distortion Phase Lock Loop PLL system with 50Khz steps for worldwide operation Full Broadband design no tune for 87 5MHz 108MHz 1W RF output power with LPF for clean spectral Theory of operation AUDIO LIMITER Audio signals are supplied from 2 XLR balanced connectors Left and right which being converted from balanced to unbalanced by low noise operational amplifiers The audio channels are than pre emphasised 50uS or 75uS and passed threw a variable gain amplifier which changes the gain according to the levels of the audio inputs when high level of audio input is inserted into the amplifier his gain reduces and output level will remain the same amplitude this produce the limiter function STEREO ENCODER The stereo encoder is based on a microcontroller and a high performance analog switch the 19Khz pilot is generated with a D A technology by the microcontroller DSP this technology produce a much improved spectral clearness and reduce the harmonic compared to other pilot generation methods By that a softer MPX filter can be used which improves overall spectral and channel separation Audio channels from limiter section are being switched by an improved analog switch device intended for high speed switching and better specif
10. er placed stereo pilot tone is present and receivers will open the Stereo decoder circuit When jumper is closed jumper is placed pilot tone will be deactivated without pilot tone receivers will not activate the stereo decoder circuit and a mono reception will be used Limiter Mode Limiter On Limiter Off Factory set to Limiter on Limiter function is very important in order to prevent modulation exceeding 75Khz which is specified by The FCC Exceeding the 75Khz modulation will result in poor audio guality and interference to other radio stations In case that an external limiter is being used the internal limiter should be set to off The limiter input and output has also clipper for protection against high levels Please remember to set both left and right channels to on or off each channel has its own jumper Limiter Mode Loud Mode Pure Mode Factory set to Loud Mode When limiter is on there are 2 modes of operation for the limiting when the difference is the speed of limiter function Loud mode fast mode will keep volume at maximum levels but will slightly make audio sound less natural Pure mode slow mode will keep audio natural but will be a slight loss of volume To decide which Limiter mode is preferred switch between loud and pure modes and listen to find your preferred choice Both Left and Right channels has their own jumper please remember to set both channel to same mode of operation Limiter clippers Clip
11. ications which also improve overall performance of the MPX signal RF SECTION The base of the RF section is a VCO voltage controlled oscillator a VCO produce a frequency corresponding to an input voltage mixing the audio with the control voltage will generate FM signal Frequency Modulation To Stabilize the VCO frequency a Phase Lock Loop circuit PLL is being used The PLL compares a digital divided sample from the VCO with a very stable and accurate reference frequency based on a crystal oscillator and generates a tuning voltage for the VCO The VCO output is being buffered and amplified to 1W by a RF power transistor and than passed threw a Low Pass Filter LPF for harmonic rejection RDS GENERATOR The RDS Radio Data System uses a dedicated microprocessor to generate a direct digital RDS signal using a synthesize technology to create a 57Khz signal at 361Khz sampling rate over sampled x 3 2 It can be programmed using a PC but stores all information in internal EEPROM memory which stores information after power down for a stand alone operation The RDS microprocessor includes all major features for the RDS standard PI Program Identification PS Program Service PTY Program Type TP Traffice program AF Alternative Frequency TA Traffic Announcement DI Decoder Identification M S Music Speech RT Radio Text UDG User Defined Group The RDS signal is being mixed into the MPX signal with a variable resistor to ch
12. nected to the audio source ground pin 2 connects to the audio source live signal Note 1 balanced signal has more immunity to external noises 2 Most CD s and computer audio outputs are unbalanced not connecting both pins 1 and 3 together in case of unbalanced audio source will result in poor audio or no audio at all Connecting the Antenna Connect a 50 Ohm antenna or dummy load The antenna is one of the major elements which effect the range of the broadcast CAUTION A 1 a wire is not an antenna connecting unmatched antenna or not connecting antenna at all will damage the final RF amplifier stage 2 Do not pass the antenna near the DCE 300 or the audio cables this could add undesired noises to the broadcast Warning N Some of the commissioned items particularly transmitters require an operating license It is an offence in some other countries of the world to radiate electro magnetic waves at certain frequencies without a license It is the Customer s responsibility to check relevant laws regulations and directives regarding licensing and putting into service any goods commissioned by Tugicom The Customer agrees to defend indemnify and hold harmless Tugicom it s employees and agents from and against any claims actions or demands including without limitation legal and accounting fees alleging or resulting from the improper or unlawful use of goods commissioned by Tugicom Finally Make it work Recheck that 50 Ohm
13. pers On Clippers Off Factory set to Clippers On Clippers are the last limiting function in order to protect against over modulation more than 75Khz If external audio processor is being used you may switch the limiter clipper off but should be very careful not to exceed the 75Khz deviation by adjusting the correct levels in the external audio processor Both Left and Right channels has their own jumper please remember to set both channel to same mode of operation rT Getting started Front panel RF Monitor A B C Buttons Ao RF MONITOR ugicam ATA DCE Digital Controlled Exciter 5 Output power limit LCD Display Rear Panel RF Output ON OFF Button GND l N A vere shock hazard Do not touc e CA output connector when tranemitter ats is on A a e de owe wa tor Arte eb e 110V 8A 220V 4A AT jim AUDIO IN un saj lisas RIGHT RF OUTPUT PUSH PUSH A fs oa RNING DO NOT BLOCK AIR FLOW lt RDS DATA MPXINOUT Audio IN AC 220 110V Input Connecting the unit Power source The DCE 300 require only standart AC 3 pole cable connect it to your AC 220 110V at your studio Connecting the audio inputs The TX190 has 2 XLR balanced inputs For balance audio source Pin 1 is the Ground pin 2 is the signal in normal polarity and pin 3 is the signal in inverted polarity For unbalance audio source both pin 1 pin 3 con
Download Pdf Manuals
Related Search