AUTV/500LD LDMOS - UHF TV Solid State Amplifier Users manual CODE: APT159B TITLE: AUTV/500LD REV: 0 DATE: 19/01/05
Registration number: IT-17686 Registration number: IT-24436 SS 96 Km 113 70027 Palo del Colle (Ba) ITALY Tel. +39 (0)80 626755 Fax +39 (0)80 629262 E-mail: elettronika@elettronika.it Web site: http://www.elettronika.
Index Index ................................................................................................................................... 3 Warning .............................................................................................................................. 5 Warranty ............................................................................................................................. 6 Introduction ..............................................................................
- Interlock .................................................................................................................... 30 - Firmware release ...................................................................................................... 31 - Serial number .......................................................................................................... 31 Section 4 - Diagram .........................................................................................................
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 It 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, ELETTRONIKA S.r.l., SS096 Km 113 Z.I. PALO DEL COLLE (BA) ITALY, warrant to the ORIGINAL PURCHASER of a NEW product, for a period of one (1) year from the date of purchase by the original purchaser (the warranty period) that the new ELETTRONIKA product is free of defects in materials and workmanship and will meet or exceed all 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 hazaedous electrical and electronic circuits. It is 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 A, B, Cs of 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 forehead back, clear out mouth if necessary, observe for breathing. If not breathing, begin artificial breathing. Tilt head, pinch nostrils, make airttght seal, 4 quick full breaths. Remember mouth to mouth resuscitation must be commenced as soon as possible.
2) If victim is responsive: - keep them warm; - 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.
LDMOS - UHF TV AMPLIFIER AUTV/500LD Users manual 11
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_______________________________________________________________________________________________ Section 1 - Information Contents: 1.1 Description 1.
AUTV/500LD LDMOS - UHF TV AMPLIFIER 1.1 DESCRIPTION The AUTV/500LD is an amplifier operating into Band IV-V for common amplification process of the Vision and Sound carriers. The amplifier has been designed to offer to the customer high performances, high reliability and greater simplicity in his operation and maintenance procedures. The amplifiers modules employ all solid state LDMOS technology in order to obtain high gain, wide-band performances, very good linearity, reliability and high efficiency.
1.2 TECHNICAL CHARACTERISTICS RF GENERAL PROTECTION THR. Frequency range Output power Video/Sound power ratio Out stage technology Vision-Sound amplification I.M.D. (-8, -10, -16dB) Standards Spurious and harmonics level RF Output impedance RF Output connector 470 - 860MHz 500W PEP 10/1 Solid State LDMOS Common Better than -54dB G, K, N In compliance with CCIR rec.
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_______________________________________________________________________________________________ Section 2 - Installation Contents: 2.1 Operating environment 2.2 Preliminary operations 2.3 Telemeasuring socket connections 2.4 RS232, RS485 and AGC socket connections 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. Always allow for at least 2 cm of clearance under the unit for ventilation. If you set the apparatus on a flat surface, install spacers on the bottom cover plate. If you install the apparatus in a rack, provide adequate clearance above and below.
When the apparatus is put within a combined system it is directly connected to the input splitting and output combining systems. Before fully powering the apparatus, check that the output connections of the coaxial cable to the antenna system are working. In order to this it is possible to check the indication of the reflected power at low power levels. Only if the SWR indication on the display is 0, the output power can be slowly increased.
PIN N° SIGNAL TYPE IN / OUT FUNCTION 1 GND - - 2 Digital Output 0V = Normal 5V = AGC Alarm 3 Digital Output 0V = Normal 5V = AGC Alarm 8 Analog Output FWD Power 9 Analog Output FWD Power AGC - DB9 Socket 2.5 PREVENTIVE MAINTENANCE To ensure maximum performance and minimum repair trouble, we strongly recommend you to follow the below stated headlines for preventive maintenance: 1. check antenna installation and ground connection at regular intervals; 2.
Front panel 5 1 LCD Display 2 Function keys 3 Status LEDs 4 RF Monitor connector 5 Main switch 6 RS232 Socket 2 1 6 3 4 DESCRIPTION 21
Rear panel 9 3 1 2 4 8 GND DRIVER - 5A CONTROL - 1A 5 6 7 DESCRIPTION 22 1 Breaker 2 Power supply socket 3 Auxiliary socket 4 Fuse 5 RS485 Socket 6 AGC Socket 7 Telemeasure socket 8 RF Input connector 9 RF Output connector
_______________________________________________________________________________________________ Section 3 - Operation Contents: 3.1 Operation 3.3 Display 3.
3.1 OPERATION At startup, after initial image, the display shows the main screen with the RF powers as in Figure 1: Figure 1: Main screen The user may turn on and off the amplifier by means of the switch on the front panel. The control board turns on all the power supplies, the exciter (if any), and internal cooling fans.
3.2 DISPLAY The control board is provided with a modern pixels graphic display with blue background. Normally it always shows a title bar (on the top line) and a status bar (on the bottom line). The title bar, see Figure 2, shows the name of the amplifier (TV Amplifier) and the current time. If the amplifier is a single unit coupled externally with other units in a high power transmitter, the title bar shows the amplifier number (slave address) too.
Figure 4: Main menu The display only shows three items at a time: all the items can be scrolled by the UP and DOWN arrow keys. Any item can be chosen by selecting it and pressing the RET key. Menu entries with an arrow on the right open sub-menus when chosen. Thus there is a hierarchical structure as in Figure 5. To go back from a submenu to the previous menu, press the ESC key. If the ESC key is pressed in the main menu, the RF powers screen is accessed.
- RF Powers This is the main screen showing the RF powers of the amplifier: forward power, reflected power, unbalances, if any. For forward power a level bar is displayed. See an example in Figure 1. - Power Supply This screen shows all the signals coming from two power supply. To check the next (previous) power supply press the UP (DOWN) key. For each power supply, the voltage, the absorbed current and the status (ON or OFF) are shown.
In case of alarm, the value of the measure which caused the alarm is saved into the log. In case of alarm still existing after five turning-on attempts, the parameter is marked as FAILED. Table 2 is the list of all the events which can be logged.
- RMS/Peak The control board can monitor both the RMS and peak powers, the first used in digital systems. The menu entry Settings RMS/Peak allows to choose the power to be displayed and monitored. This menu is present only in certain amplifiers. - Date/Time This screen allows to set the current date and time. The setting is changed by pressing the arrow keys, then pressing the RET key to move to the following value and eventually save the changes.
- Frequency (only for some Amplifiers) The forward and reflected RF powers is measured by means of a directional coupler. In order to compensate for the effect due to the sampling made by the coupler, it is possible to set the frequency by menu entry Settings Frequency. The setting can be changed by pressing the arrow keys. The changes made are saved by pressing the RET key or discarded pressing the ESC key. Set the video carrier frequency.
menu item Settings Interlock. When it is enabled, the status bar shows the lock symbol (see Figure 3), which is close if the interlock chain is closed (no alarm) or open if it is open (alarm). - Firmware Release The menu entry Settings Firmware Release allows to display the firmware version number and the hardware release of the amplifier. - Serial Number The menu entry Settings Serial Number allows to display the serial number of the apparatus.
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