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Mozart series calibrating procedure

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On the front panel, adjust the RT1 trimmer up to see the “ALARM” led turns ON near

the display. The FWD power decreases to 0 and will try to increase automatically.

Fig. 23 – Control board RT1 adjust

NOTE: After 5 attempts to increase the FWD power, the amplifier will go in shutdown state.

The ALARM led near the button will turn ON and the RF ON led will be turned OFF. Press

RESET ALARM button to restore the normal function state of the amplifier.

Fig. 24 – Shutdown state LED turns ON

Switch off the amplifier and connect the 50ohm load to the output of the amplifier.

Alarm led
turns on

RF ON/OFF
led turns off

Reset Alarm
Button

Содержание MOZART Series

Страница 1: ...rating procedure 1 19 PROCEDURE TO CALIBRATE A MOZART Release 1 0 DB ELETTRONICA TELECOMUNICAZIONI S p A Riviera Maestri del Lavoro 20 1 35127 Z I SUD PADOVA ITALY Ph 049 870 0588 Fax 049 870 0747 http www dbbroadcast com ...

Страница 2: ...update Document History Rev Date Name Details 1 0 June 2014 AB Issued June 2014 Version 1 0 2014 Copyright by DB Elettronica Telecomunicazioni SpA Riviera Maestri del Lavoro 20 1 35127 Z I SUD PADOVA ITALY All rights reserved All specifications characteristics and circuit descriptions indicated in this manual are subject to change without notice ...

Страница 3: ...FIG 5 MPX BOARD PROGRAMMER CONNECTOR 7 FIG 6 CONTROL BOARD PROGRAMMER CONNECTOR 7 FIG 7 50OHM LOAD CONNECTION 8 FIG 8 ENABLE SHORT CIRCUIT INTERLOCK 9 FIG 9 AMPER METER DIAGRAM 10 FIG 10 AMPER METER IN SERIES 10 FIG 11 RF ON OFF BUTTON 11 FIG 12 SET POUT MENU 11 FIG 13 500W RF AMPLIFIER MODULE 12 FIG 14 1KW RF AMPLIFIER MODULE 12 FIG 15 30W RF MODULE RT4 ADJUST 13 FIG 16 30W RF MODULE RT2 ADJUST 1...

Страница 4: ...er please follow the next steps STEP 1 FILTER CHECK Before starting to calibrate the Mozart the output filter must be calibrated using a Network Analyzer Below the best results of a calibrated filter are shown Fig 1 Output filter result nr 1 Fig 2 Output filter result nr 2 ...

Страница 5: ... the switching power supply units inside the box are present see next paragraphs adjusting them to the correct values POWER SUPPLY On the power supply set the output voltage to 44VDC adjusting the trimmer with a screwdriver Fig 3 RS 150 48 output voltage On the power supply board that is different for every model you must make sure that the GREEN LED is lit up this indicates that the switching is ...

Страница 6: ... 01 POWER SUPPLY BOARD On the 001 000185 01 power supply board check if a the 44VDC input power is present b 15VDC 15VDC 12VDC 12VDC and 5VDC output power are present Fig 4 001 000185 01 DC DC converter 44VDC GND GND 5VDC 12VDC GND 12VDC 15VDC GND 15VDC ...

Страница 7: ...Mozart in the local disk C b Install ICD3 and MPLAB in your computer as indicated in the instruction manual of ICD3 c Connect the ICD3 programmer to an USB port of your PC and to the Mozart transmitter connectors see the photos here below Program first the 001 000167 02 board and after the 001 000166 02 board Fig 5 MPX Board programmer connector Fig 6 Control Board programmer connector d Switch ON...

Страница 8: ...Mozart series calibrating procedure 8 19 h After the process is complete switch off the Mozart amplifier and connect to it a 50ohm load to output Fig 7 50ohm load connection ...

Страница 9: ...4 RF POWER CHECK a On the 001 000181 01 board PLL VCO board disconnect the RF output coax cable SMB connector from the board b On the rear of the amplifier make a short circuit on the ENABLE connector INTERLOCK Fig 8 ENABLE short circuit INTERLOCK ...

Страница 10: ...ER MODULE This step is only for Mozart 50 150 300 500 and 1000 c Disconnect the power cables from the RF amplifier module pallet which go to 48V main power supply and connect an amper meter in series Fig 9 Amper meter diagram Fig 10 Amper meter in series ...

Страница 11: ...OFF button on the front panel to enable the RF The green led near the button will turn on Fig 11 RF ON OFF button f On the LCD from the front panel go to menu 02 Power FWD and set the Set Pout to the maximum value Confirm the operation by pressing the OK button Fig 12 Set Pout menu g Set the trimmer on the RF amplifier module so as to obtain 200mA current absorption on the amper meter without the ...

Страница 12: ... Fig 13 500W RF amplifier module Fig 14 1KW RF amplifier module 30W RF DRIVER MODULE The steps below are only for Mozart 500 and 1000 with the indicated values for the other models please see the table below with the right values of components ...

Страница 13: ... have the maximum voltage on the drain of the Q3 mosfet The approximate voltage is 18 5V Fig 15 30W RF module RT4 adjust b Adjust the RT2 trimmer to have a voltage drop of 20mV on the R22 resistor Fig 16 30W RF module RT2 adjust c Adjust the RT1 trimmer to have a voltage drop of 10mV on the R36 resistor ...

Страница 14: ... 5V Mozart 50 80mV 18 5V Mozart 150 5mV 2 5mV 18 5V Mozart 300 10mV 5mV 18 5V Mozart 500 20mV 10mV 18 5V Mozart 1000 20mV 10mV 18 5V d Press RF ON OFF button on the front panel to disable the RF and switch off the amplifier e Disconnect the amper meter and reconnect the power cables to the RF amplifier module At this point the RF Power modules were calibrated successfully ...

Страница 15: ... b Switch on the amplifier and check if the Set Pout is set to maximum on the 02 Power Fwd menu on the display If not set the output power to maximum c Press RF ON OFF button on the front panel to enable the RF d On the 001 000166 02 board adjust the RT7 trimmer to set the maximum power of the amplifier Fig 18 Control board RT7 adjust ...

Страница 16: ...ts d Press RF ON OFF button on the front panel to disable the RF Note this procedure must be made for all frequency 87 5MHz 98MHz and 108MHz To change the frequency go to main 01 Frequency on the display set the frequency and confirm by pressing OK button e After the procedure has been made for all frequency set the frequency back to 98MHz SET THE FOLDBACK REFL AND REFL WARNING ALARMS a Go to 02 P...

Страница 17: ... Set REFL warning d Press RF ON OFF button on the front panel to enable the RF e Disconnect the 50ohm load from the rear of the amplifier f On the 001 000166 02 board adjust the RT5 trimmer to set the reflected power at the same value of the forward power ex FWD power 250W RFL power 250W Fig 22 Control board RT5 adjust ...

Страница 18: ...just NOTE After 5 attempts to increase the FWD power the amplifier will go in shutdown state The ALARM led near the button will turn ON and the RF ON led will be turned OFF Press RESET ALARM button to restore the normal function state of the amplifier Fig 24 Shutdown state LED turns ON h Switch off the amplifier and connect the 50ohm load to the output of the amplifier Alarm led turns on RF ON OFF...

Страница 19: ... 10 Fig 25 FOLD BACK REFL and REFL WARNING are set to 10 j Press RF ON OFF button on the front panel to enable the RF k Disconnect the 50ohm load from the output of the amplifier The led WARNING will be turned on Check if the FWD power is 10 of SET Pout ex The FWD power must be 25W with WARNING turned on because before this we have set the FWD power to 250W ...

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