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Table of Contents
Related Manuals for DB Elettronica Telecomunicazioni MOZART Series
Summary of Contents for DB Elettronica Telecomunicazioni MOZART Series
- Page 1 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 - Mozart series calibrating procedure...
- Page 2 © 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. Mozart series calibrating procedure 2 /19...
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Page 3: Table Of Contents
ADJUST . 23 – C .......................... 18 ONTROL BOARD ADJUST . 24 – S ON ........................18 HUTDOWN STATE TURNS . 25 – FOLD BACK REFL REFL WARNING 10% ................. 19 ARE SET TO Mozart series calibrating procedure 3 /19... -
Page 4: 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 Mozart series calibrating procedure 4 /19... -
Page 5: Step 2: Power Supply Check
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 enabled for the functioning. Mozart series calibrating procedure 5 /19... -
Page 6: 001-000185-01 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. +5VDC -12VDC +12VDC -15VDC +44VDC +15VDC Fig. 4 – 001-000185-01 DC-DC converter Mozart series calibrating procedure 6 /19... -
Page 7: Step 3: Programming The Boards
Switch ON the Mozart (without output power) e) Start MPLAB from your PC without inserting or modifying any value f) Upload the firmware g) Press any key to exit from the DOS window. Mozart series calibrating procedure 7 /19... -
Page 8: Fig . 7 - 50 Ohm Load Connection
After the process is complete, switch off the Mozart amplifier and connect to it a 50ohm load to output. Fig. 7 – 50ohm load connection Mozart series calibrating procedure 8 /19... -
Page 9: Step 4: Rf Power Check
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) Mozart series calibrating procedure 9 /19... -
Page 10: Rf Amplifier Module
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 Mozart series calibrating procedure 10 /19... -
Page 11: Fig . 11 - Rf On/Off 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 RF connected (see point a) of step 4). Mozart series calibrating procedure 11 /19... -
Page 12: 30W Rf Driver Module
Fig. 13 – 500W 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. Mozart series calibrating procedure 12 /19... -
Page 13: Fig . 15 - 30W Rf Module Rt4 Adjust
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. Mozart series calibrating procedure 13 /19... -
Page 14: Fig . 17 - 30W Rf Module Rt1 Adjust
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. Mozart series calibrating procedure 14 /19... -
Page 15: Step 5: Starting The Amplifier
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 Mozart series calibrating procedure 15 /19... -
Page 16: Check For Rf Spurious And Harmonics
FWD power (ex: if Mozart 1000, set the Pout to 250W). b) Go to “[07] Alarms” menu on the display and set the Foldback REFL to 100%. Fig. 20 – Set Fold back REFL Mozart series calibrating procedure 16 /19... -
Page 17: Fig. 21 - Set Refl Warning
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 Mozart series calibrating procedure 17 /19... -
Page 18: Fig. 23 - Control Board Rt1 Adjust
RF ON/OFF turns on led turns off Reset Alarm Button Fig. 24 – Shutdown state LED turns ON h) Switch off the amplifier and connect the 50ohm load to the output of the amplifier. Mozart series calibrating procedure 18 /19... -
Page 19: Fig . 25 - Fold Back Refl And Refl Warning Are Set To 10
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. ) Mozart series calibrating procedure 19 /19...
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