Elettronika TXUP10000 User Manual
LDMOS TV SOLID STATE AMPLIFIER
AUTV/1500LD
User’s manual
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Section 1 - Information
Contents:
1.1 Description
1.2 Technical characteristics
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AUTV/1500LD TV AMPLIFIER
1.1 DESCRIPTION
The AUTV/1500LD 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, wideband performances, very good linearity, reliability and high efficiency.
The equipment design allows the soft degradation (RF power loss) for several transistor faulty: in fact the
output combiner uses RF power resistors for unbalancing power dissipation. The unit is enclosed in a cabinet
for 19”- 6U rackmounting.
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1.2 TECHNICAL CHARACTERISTICS
RF SECTION
Frequency range 470 - 860MHz
Output power 1300W PEP
Video/Sound power ratio 10/1
Out stage technology Solid State LDMOS
Vision-Sound amplification Common
I.M.D. (-8, -10, -16dB) Better than -54dB
Standards G, K, N
Spurious and harmonics level In compliance with CCIR rec.
RF Output impedance 50Ω
RF Output connector 7/16”
GENERAL
Power supply 230Vac, ±10%, 50/60Hz
Power consumption 3400VA at black level
RS232 Socket DB9 Connector (on front panel)
RS485 Socket DB9 Connector (on rear panel)
Telemeasuring socket DB9 Connector (on rear panel)
AGC Socket DB9 Connector (on rear panel)
Power factor > = 0.9
Ambient temperature -5° to +45°C
Relative humidity 20% - 90%
Altitude Up to 2.500 meters
Cooling Forced air
Cabinet Rack 19”-6U
Weight 70kg
400Vac 3P+N (on request)
PROTECTION THR.
FWD Power 1500W
REF Power 150W
Unbalacing 300W
Temperature 75°C
I
DC
V
DC
18A
Min 10V - Max 33,5V
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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
2.5 Preventive maintenance
Front panel
Rear panel
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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. Do not locate
the apparatus directly above a hot piece of equipment.
2.2 PRELIMINARY OPERATIONS
Correct installation of the equipment is important for maximum performance and reliability. Antenna and earth
connections must be installed with the greatest care. The equipment adjustment isn’t need, because the unit is
completely adjusted by our technical staff. This is the installation procedure:
1. connect the power supply cable of the exciter to the auxiliary socket on the rear panel of the amplifier;
2. connect the power supply cable of the amplifier to the electric network (230VAC). If there is the Isolator
Transformer, the amplifier is provided with cable and plug;
3. connect the exciter / antenna cables respectively to the RF IN and RF OUT on the rear panel of the
amplifier.
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WARNING!!!
FOR ELECTRICAL SAFETY REASONS AND IN ORDER TO KEEP
THE APPARATUS SAFE, THE GROUND TERMINAL OF THE
APPARATUS MUST BE CONNECTED TO THE EXISTING GROUNDING SYSTEM AND NOT BY USING THE SHIELD OF THE OUTPUT
COAXIAL CABLE.
Monophase cabling
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Three-Phase cabling
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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. At maximum output power,
some watts might be shown as reflected power.
2.3 TELEMEASURING SOCKET CONNECTIONS
PIN N° SIGNAL TYPE IN / OUT FUNCTION
1Analog OutputFWD Power
2 Analog Output REF Power
3 Digital Output Temperature
4 Digital Input Interlock
5 GND - -
DB9 Socket
6 - 7 Digital Output Free contact (closed when alarm)
8 Digital Input
9 Digital Input
0V = ON
5V = Normal
0V = OFF
5V = Normal
2.4 RS232, RS485 AND AGC SOCKET CONNECTIONS
PIN
FUNCTIONS
PIN
FUNCTIONS
123456789
-TxDRxD-GND- - - -
RS232 - DB9 Socket
123456789
-Rx-Rx+5VGND-Tx-Tx+-
RS485 - DB9 Socket
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PIN N° SIGNAL TYPE IN / OU T FUNCTION
1GND - -
2 Digital Output
3 Digital Output
8 Analo g Output FWD P owe r
9 Analo g Output FWD P owe r
AGC - DB9 Socket
0V = Normal
5V = AGC Alarm
0V = Normal
5V = AGC Alarm
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. keep your apparatus clean and dry externally: this will ensure continuous functioning of the front panel
controls;
3. if the apparatus has not been used for a long period of time combined with exposure to extreme environmental conditions, open the unit and make a visual inspection.
Remove salt, water or ice with a moist cloth before turning the apparatus on. Check that the cooling fans are
running freely.
4. for general maintenance and top performance, call an authorized service technician to give the apparatus
and the complete antenna/earth connection installation a general check every 12-18 months;
5. check at regular intervals that the air intake located on the front panel is free of dust. If there is visible dust,
remove it by means of a soft brush.
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Front panel
DESCRIPTION
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5
3
1 LCD Display
2 Function keys
3Status LEDs
4 RF Monitor connector
6
5Main switch
6 RS232 Socket
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2
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Rear panel
DESCRIPTION
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6
1 Breaker
2 Power supply socket
3 Auxiliary socket
4Fuse
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5 RS485 Socket
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9
4
2
3
6AGC Socket
7 Telemeasure socket
8 RF Input connector
9 RF Output connector
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Section 3 - Operation
3.1 Operation
3.2 Display
3.3 Menus
Contents:
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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. While the amplifier is working, the
micro-controller monitors continuously the most important parameters: power supply voltages, absorbed
currents, high power zone temperature, forward and reflected powers, unbalances (if any). Each measure is
associated to a maximum threshold beyond which the amplifier is immediately put in protection status by
turning off one or more power supply, depending on the failed block. In order to prevent a temporary problem
to trigger a definitive protection status, the failed block is turned on again, after some seconds, for up to five
times. If it goes beyond the protection threshold for more than five times, it is declared as FAILED and it will
no longer be turned on. In this case, the amplifier will have to be turned off manually by means of the switch on
the front panel, then turned on again after performing the needed maintenance.
On the front panel there are also three LEDs labelled ON, REMOTE and ALARM. Their meanings are
explained in Table 1.
LED COLOUR MEANING MEANING WHEN BLINKING
The amplifier has been turned on
ON Green The amplifier is on
REMOTE Yellow
ALARM Red An alarm is present It never blinks
Table 1: Meanings of the three LEDs on the front panel
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Screenshots in this manual are indicative, so they can be different from those on your equipment.
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Remote control is
enabled
locally but it has been turned off by
remote
It neve r b li nk s
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 2: Title bar
The status bar (Figure 3) indicates the forward and reflected powers and the temperature. It also contains two
symbols for the interlock (lock) and the alarm (bell).
Figure 3: Status Bar
The bell symbol is continuously displayed in case of alarm. It blinks if there has been an alarm which has ended
but has not yet been seen by the user. It stops blinking once the Log has been checked.
The interlock symbol is displayed only when this function is enabled. It may be either a close lock, as in Figure
3, when there is no alarm (interlock chain closed) or an open lock in case of alarm (interlock chain open).
Since the status bar is always showed on the display, regardless of the screen, the user may monitor at any
time the most important parameters and the presence of alarms while moving between different screens.
3.3 MENUS
The user may see or modify locally some configuration parameters using the four buttons on the front panel.
All screens areorganized in a hierarchical menus and the user may move between them in a simple and intuitive
way.
To see the menu it’s sufficient to press the ESC key (see Figure 4).
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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.
Figure 5: Hierarchical menu structure
All menu items are described in detail below.
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