MIRAGES FM Stereo Radio Transmitter User’s manual ELE Rene CODE: APF009 TITLE: MIRA 2508 REV: 6 DATE: 20/05/02
Index Index... Warning Warranty Introduction . Content of the manual Treatment of electrical shock . First-aid Treatment of electrical burns Section 1 Information 1.1 Description 1.2 Technical characteristics Block diagram Section 2 Installation. 2.1 Operating environment .. jo. 2.2 Power supply socket and m main in switch . 2.3 RF Output connector and RF Monitor 2.4 LEFTMOST and RIGHT/MONO Connector: 2.5 Input connectors SCANDALIZE. 2.6 Monitory Connector 2.7 Telemarketing socket 2.8 PC BUS Socket. 2.
3.5 Audio input and Sirree COIN ae irrererenrcrcececcrcn arenas sereneness seamen nonenforceable 38 3.6 Power programming 3.7 Time setting 3.8 Password 3.9 Voltages reading . 3.10 Remote setting... 3.11 Other LED 3.12 Connections with RDS coder Connection with internal Stereo Coder . Connection with external Stereo Coder Section 4 Adjustments 4.1 Adjustment points .. 4.2 Electrical characteristics 4.3 List of test equipment suggested 4.
WARNING The apparatus described in this manual has been designed and manufactured with devices to safeguard the users. In any case it is recommended that during any operation of installation, maintenance, miscellaneous interventions and calibrations requiring the apparatus to be switched on, THE USER TAKES ALL THE PRECAUTIONS AGAINST INCIDENTS Ti is required to use the proper clothes and protection gloves in order to prevent damages from incidental contacts with high-voltage parts.
Warranty Summary of warranty We, ELECTRONICA S.r.1, $3096 Kin 113 2.1. PAL DEL CELLO (BA) ITALY, warrant to the ORIGINAL PURCHASER of u NEW product, for period of one (1) year from the date of purchase by the original purchaser (ihe “warranty period” hat the view ELECTRONICA product is free of defects int materials and workmanship ond will meet or exceed ali advertised specifications for such a product.
INTRODUCTION "The apparatus described in this manual is the latest of this series, offering high performances, remarkable reliability and a wide range of characteristics, it all at a low cost. Its is easy to install and use. It only takes to follow the installation procedure as shown in this manual: after having removed all from the package, you only have to follow step by step the description in the various sections.
WARNING! The currents and voltages in this equipment are dangerous! Personnel must at all times observe safety regulation! This manual is intended as a general guide for trained and qualified personnel who are aware of the dangers inherent in handling potentially hazardous electrical and electronic circuits. Iris not intended to contain a complete statement of all safety precautions which should be observed by personnel in using this or other electronic equipment.
Treatment of electrical shock 1) If victim is not responsive follow the basic life support. PLACE VICTIM FLAT ON HIS BACK ON A HARD SURFACE A -AIRWAY B BREATHING If unconscious, open airway lift up neck, push If not breathing, begin artificial breathing. ‘Tilt forehead back, clear out mouth if nec head, pinch nostrils, make airtight seal, 4 quick observe for breathing. full breaths. Remember mouth © mouth resuscitation must be commenced as soon as possible. C CIRCULATION Check carotid pulse.
2) If victim is responsive: keep them warn; keep them as quiet as possible; loosen their clothing (a reclining position is recommended). FIRST-AID Personnel engaged in the installation, operation, maintenance or servicing of this equipment are urged to become familiar with first-aid theory and practices. The following information is not intended to be a complete first-aid procedure, it is brief and is only to be used as a reference.
MIRA FM STEREO RADIO TRANSMITTER fg 1.1 DESCRIPTION The Mira represents a family of radio transmitters available with 30W, 130W and 250W power, completely controlled by microprocessor, used for radio transmissions in FM band, both stereo and mono. The high technological content along with the use of surface mounting components allowed the realization of an apparatus with excellent performances and limited dimensions.
connections RS232 and R485 for remote control, I’C BUS to communicate with output power stages to exchange information reciprocally: automatic output power level control; hour scheduling of output power; control of all the functions via touch-screen display; all the final stages with SAMOSET technology; a stereo coder can be integrated directly on the mother board.
Section 2 Installation Contents: 2.1 Operating environment 2.2 Preliminary operations 2.3 Power supply socket and main switch 2.4 LEFTMOST and RIGHTMOST connectors 2.5 Input connectors SCABIES 2.6 Monitory connector 2.7 Telemarketing socket 2.8 PC BUS Socket 2.9 R8232 and RS485 Socket 2.10 External reference connector 2.
2.1 OPERATING ENVIRONMENT You can install the apparatus in a standard component rack or on a suitable surface such as a bench or desk. In any case, the area should be as clean and well-ventilated as possible. Do not locate the transmitter directly above a hot piece of equipment. The upper and lower lids can be dismounted to allow an easy internal access. The MIRA is designed with a modular design, that is each circuit is realized inside different modules or boards.
2.3 RF OUTPUT CONNECTOR AND RF MONITOR In the upper side of the panel there is the RF Output connector (Ill. 2-2). The output load, represented by the antenna, may be connected to this connector. Make sure that this load marches exactly the output impedance of the apparatus. This is a necessary condition not only to obtain the best performances but most of all to prevent the final stages of the apparatus from breaking.
24 LEFTMOST AND RIGHT/MONO CONNECTORS On the rear panel there are two audio inputs (J. 2-3) to be used for the LEFT and RIGHT or MPX and MONO signals. The use of a balanced line reduces the noise during long connections, anyway it is good practice to use it always. For both inputs the impedance may be selected between 600 and 10k€2 by means of an internal jumper. The selection of the inputs is made from rhe frontal panel, as well as the adjustment of the input level.
2.5 INPUT CONNECTORS SCABIES Ir is possible to connect an external SCA generator to the connectors IN CAL and IN SCAN (BNC) located on the rear panel (Fil. 2-4). The input is for the range 60-kHz, but a lower frequency may be used if the transmitter is working in mono mode (the band from 23 to kHz is used for stereo transmission. A 7,5kHz deviation (modulation 10%) an input of about 2,2Vpp is required. The level of the inputs is adjusted by means of the trimmers next fo the two connectors.
2.6 MONITORY CONNECTOR On the rear panel there is a connector, Monitor 10kHz/MPX (Il. 2.5), trough which it is possible to monitor the work of the internal coder. By means of an internal jumper JP (see the Annex possible to select the MPX output or the kHz tone to be used for the synchronization with external apparatuses. illustration 2.5 Monitory Connector 2.7 TELEMARKETING SOCKET # On the rear panel there is also the device for remote control and measuring of the transmitter.
1 Ground . . . GND: Power inhibition : 2 Digital IMP gio ate: Normal operation a Ara log Supt | FWD Power it 4 Ana lag Output REF Power irt TELEMARKETING SOCKET 6 Analog Output | Temperate Alarm 7 Digital output | 8 Analog inp | FWD Power et 9 Analog inp | REF Power ext 2.8 POCKETBOOK “This docker allows to connect the equipment to other devices, such as, an power amplifier, with the same socket (FIL 2-7). AEE Must ration 2.
2.9 R8232 AND RS§485 SOCKET Connector for the serial connection via standard RS232 (If. 2-8). This allows a direct access via PC and a remote access via modem on commuted telephone line or GSM. Connector for the serial connection via standard RS485 (Hi. 2.8). This allows a remote access via modern on commuted telephone line or GSM.
2.10 EXTERNAL REFERENCE CONNECTOR ‘When a frequency stability better than 2,5ppm is selected, a signal with frequency of 5-10MIHz, coming from a very stable oscillator or the GPS system, has to be connected to the external reference connector (1l. 2-9). The selection of the frequency can be made from the frontal panel. The input level must be between -10 and DBMS on 500. Must ration 2.
Jumper setting Closed Closed External AGC Open Open NO AGC Closed Open Internal AGC Open Closed NO AGC Cabling In case of AGC stabilizing output power of a transmitter where MIRA acts as Driver, the MIRA needs to be connected to “Amplifier Control” unit on the socket are: pleasuring” DB IF socket.
2. connect the 3V to pin 8 of “Telemarketing” MIR A connector and Power Supply GND to pin 1 of the SALE Connector; 3. with the tester read the voltage on RI?34 resistor (the one close to the trimmer RI'37 TWD EXT") on the terminal you prefer; 4. rotate the trimmer in order to have the same power supply voltage and voltage on RF. Attention: do not use voltages equal or above SV. AGC Implementation The AGC goal is to maintain stable the output power.
Rear panel Monitor socket RF Output connector °C BUS Socket Telemarketing socket RS485 Socket R8232 Socket Main switch Line socket © ~N®o ne wn External signal referent ° LEFTMOST Input signal RIGHTMOST Input signal nN Auxiliary input with trimmers regulation w Output monitor socket 31
Section 3 Operations Contents: 3.1 Description of the work of the MIRA 3.2 Frequencies menu 3.3 Audio level menu 3.4 FWD Power menu 3.5 Audio input and Stereo Coder 3.6 Power programming 3.7 Time setting 3.8 Password 3.9 Voltages reading 3.10 Remote setting 3.11 Other LESS 3.
[EEE 3.1 DESCRIPTION OF THE WORK OF THE MIRA At startup, after a short introduction, the display of the device shows the following screen: ( TX FM MIRA Touch “MORE to show the other parameters that can be changed. The main screens can be seen in the Pie. and.
( TX FM MIRA In the main menu touch “OF” to turn off the equipment. Touching “YES” it goes in “STAND-BY” mode, the screen becomes black and the “STAND-BY” led lights up. Touching “NO” returns to the previous menu. ‘While the apparatus is in "STAND-BY", just touch any location of the display to turn it on. Touching the display in the position of the parameter to be changed opens a sub menu. FREQUENCIES MENU ‘When entering this menu, the display shows the following picture, showing all the values ser.
"Touching the relevant window on the display the following parameters can be set: frequency of the transmitter; step; reference frequency. To change the transmission frequency touch the “FREQ.”. The display shows the following: Note: If “STEP” is selected the working frequency is automatically set to MHz, thus it has 1o be ser again. To set the frequency: use the arrow key to achieve the desired value; press “RET” to confirm the value and exit; press “MAIN” to exit without confirming.
(1 TX FM MIRA Choose the channel; use the arrow key to set the voltage level or the emphases type; press “MAIN” to go back to the main menu. 34 FWD POWER MENU To enter this menu press “FWD POW” in the main menu. In this menu the output power can be set.
AUDION INPUT AND STEREO CODER The audio input can be either mono, stereo or MPX. This can be set pressing “INPUT AUDIO” in the main menu and choosing one of the three entries. To enable or disable the stereo coder, touch the “STEREO CODER” window in the main menu. If the stereo coder is enabled, the relevant led will be lit. 3.6 POWER PROGRAMMING When this function is enabled, the apparatus is programmed to work at different powers at different times of the day (for instance 30W in the day, 15W at night).
3.8 PASSWORD The apparatus may be password-protected. When this function is enabled the parameters cannot be changed (actually the sub menus cannot be entered). To disable this protection the password must be inserted. It is also possible to change the password (5 digits). This operation is possible only if the apparatus is not protected. EL Zion 3.9 VOLTAGES READING It is also possible to display the power supply and driver voltages.
EEE, 3.10 REMOTE SETTING This menu allows to set the external connection (RS232, RS485) and the address 3.11 OTHER LESS Led “ON AIR": turns on when the transmitter sends power to the antenna; Led “REMOTE”: turns on when the apparatus is connected using a given software. This way any local control is disabled. If no operation is made for about 5 minutes, the blacklist turns off. To turn it on again, touch any Location of the display. 3.
Section 4 Adjustments Contents: 4.1 Adjustment points 4.2 Electrical characteristics 4.3 List of test equipment suggested 4.4 Calibration steps for the MIRA 4.
4.1 ADJUSTMENT POINTS "This section contains the indication for the testing of the transmitter MIRA in the versions 30, 150 and 250W. Ir includes: eo Indication of the calibration points; o Indication of the setting point; ® Electrical characteristics; ® List of instruments; e ‘Testing procedure; © Main characteristics of functioning and quality. 4.
4.3 LIST OF TEST EQUIPMENT SUGGESTED Spectrum Analyses Check of the RF emission spectrum Calibration of the low-pass filter (f Network Analyses at the output of the final stage Watt meter Reading of the output power Dummy Load Checking of the torrent functioning of the audio Oscilloscope limitation circuit Used as audio generator and modulation analyses FAB HORDE & SCHWARTZ (noise and audio characteristics) Multi meter Reading of the power supply voltages 4.4 CALIBRATION STEPS FOR THE MIRA 30W 1.
MAIN BOARD (Check of the RF power and calibration of the readings) Make sure that the board generates a RI signal with a level of about DBMS on the whole band. Disconnect the RF cable from the board of the final, bring the power regulation to the maximum level from the touch screen and adjust RAS so to read 20V at the test point JA2, verity that with the regulation at the minimum the same point reads SV Set the transmitter to MHz.
7. 8. ® Measure the L>R crosswalk and if needed improve it by acting on the trimmer RB and RB (L—R) and on the compensatory CB for the adjustment of the kHz phase. e Measure the MeL. crosswalk and if needed improve it by acting on the adjustment of the LEFT/RIGHT balancing by means of RB and on the elliptical low-pass filters of the LEFT channel (LPB1-2). » Characterize the work of the stereo coder by measuring passing band, distortion, emphasis curve (30 e 73s) and noise.
Note: for MIRA 150 and 250W the marked points must be modified us follows: 48 1) a. Network fuse Final Polarization 50mA @ 50V Asama @ 50V RF Driver Polarization 220mA @ 28V 220mA @28V 3) b. RAS for voltage on JAZ 5:23 5:23V 3)d.
Section 5 Diagram Contents: Cable diagram 5.
5.1 GENERAL DESCRIPTION "There are four distinct modules in the apparatus. 1. Power supply The integrated switching power supplies allow the apparatus to work with an extended range of power supply voltage. They have inside themselves the over voltage-protection discharges and the most powerful version include as well a correction circuit for the power factor. 2. Final R.F. Module The R.F. amplifier, the heat sink and the cooling fans are a single block. The R.F.
TUTTI = ea rR Careen = Fig. 1 Mother board ‘The following parts can be seen: BF section, synthesizer and external reference control section, power supply section and digital section with the micro controller. In the BF section there are the 4 connectors for the input signals, the two BNC for the SCA inputs and two XLR connectors for the LEFT and RIGHT or the external MPX and MONO signals Every input has a low-pass filter to improve the rejection of unwanted signals.
the VCO. Three peak detectors provide the micro controller with the information needed to indicate the levels of the input signals (IC38/A, IC40/A) and the modulation (IC5/A). The synthesizer section contains the VCO and the PLL for the synthesis, both in a single metal cabinet. The RT signal in output is about Bimini and is brought to DBMS by means of an amplification stage (TR.
SCHOENBERG : Lo] oF (RTE] leaflet] my ’ Ci EER a= & fm [SJL [EI BEL I £1].
Part Name/Number Description IND 05¢ INDUCT OR INDUCT OR NIV OR ACTOR J R J CDFLBAUNL HECTOR J CF-167 027 HECTOR J 2 02356 J H £2852 JUMP 02707-02742 X CTC30-01 GRATED SM 1206 68 Qty. Comps.
Part Name/Number Description Qty. Comps.
Part Name/Number Description Qty. Comps.
Part Name/Number R Description RES 1/4 5% RES 1/4W 1% 17 Av 174% 174% 1 174% “ a o SMD SM SMI 1206 1206 1206 sMp 1206 SMD 1206 SMD 1206 SMD 1206 SMI 1206 SM 1206 SMD 1206 ¢ SMD SMD SM Qty. 4 Comps.
TOUCH SCREEN DISPLAY SCHOOLMARM DESCRIPTION AND FUNCTIONING These are the 4-wire analogical Touch Screens composed by two layers separated by an insulating spacer. A pressure applied with a finger or a pen causes an electrical contact of the rwo layers which may be detected just like closing a switch. Extremely accurate information concerning the position of the switch may be obtained measuring the resistivity level at the X and J axis.
USE AND MAINTENANCE Clean regularly the surface of the Touch Screen to remove dust, dirt, fingerprints and other materials affecting its optical qualities. For a better result use a moist and clean cloth along with any nonabrasive commercial cleaner. Prolonged contact with abrasive or dry materials may scratch the surface, eventually affecting the quality of the image.
DESCRIPTION "The module contains the direction copulate which measure the incident and reflected RF signals. These signals are elaborated to be used by protection module for SWR and Power protection. The low-pass filter remove the harmonics. SPECIFICATIONS Re tin loss >» = 30dB Insertion loss < 0,2dB Attenuation al [MHz > 40dB Component layout Directional Couplet and LPF.
SWITCHING POWER SUPPLY SPECIFICATION MODEL DC Om put Voltage Output Rated Current Output Car vent Range Ripple & Noise (p-p) DC Output Power Efficiency DC Voltage Adj. Ever V. Protection Input Voltage Range Input Frequency Power Factor Overload Protection Over Temp. Protection Fan Control Working Temp.
~ N {pea \ Monitor coder MP Ef l1okHz #38 on B lot) (upc) AF limiter rm Modulator on a off & { JP Channel Right sign R [iH ‘JP Right put impedance / soon 10k [J {ape Sett input impedance SI 60a0/hal Setting poi {cusps Modem setting foe, Jape | ~ ~ External reference J | [wes test point ’ { Stereo coder PD | nd outside BF ve inside