Electronika LDMOS UHF SERIES User Manual

LDMOS UHF SERIES

MEDIUM POWER TV AMPLIFIER

User’s manual

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Section 1 - Information

Contents:

1.1 Description

1.2 Main Features

1.3 Technical characteristics

1.4 Front panel

1.5 Rear panel Rear connections

1.1 DESCRIPTION

The amplifier belongs to the Medium Power Amplifier products family of T elevision Amplifiers fully in solid state LDMOS technology . These TV Amplifiers operate in the UHF Band with Common amplification process (separate amplification available) of the V ideo and Audio carriers. This Amplifier family has been designed to of fer to the customer high performances, high reliability and greater simplicity in its operation and maintenance procedures. The V ideo and Audio signal processing is provided for all TV Standards and all types of Audio applications (Mono & Dual Sound - NICAM) together with the different colour systems such as P AL - NTSC - SECAM. Thanks to the amplitude and phase and non linearity pre-correction circuit, it is possible to cancel the distortions in the output stage, thus cutting down the operating costs. Due to the common amplification design, the transmitter is easily upgradeable to any digital TV standard: DVB-T , DVB-H, DMB-T , ATSC. It is only necessary to replace the modulator and the RF output band pass filter, all the other components are used without any change. The cooling system is fully contained into the amplifier, and it is based on forced air flow . A powerful and very low acoustic noise blower is used. A front panel air dust filter is available, sized in order to enable easy replacement. The user interface is based on a graphics display , where all the parameters are showed. A detailed log of events and alarm help the maintenance of the system. The unit can be fully controlled in REMOTE mode via PC direct-link or via PSTN, GSM or Ethernet networks by means of Elettronika Remote Control System. The system can be easily upgraded with dual drive option. Besides, the transmitter can be easily integrated in a 1+1 or more complex N+1 redundancy configurations.

1.2 MAIN FEA TURES

- LDMOS T echnology;

- Forced-air cooling system;

- Analog and Digital input signal;

- High efficiency;

- Wir ed and serial r emote control (RS232 or RS485);

- All voltages and currents available on display;

- Output filter included.

MEDIUM POWER TV AMPLIFIER

SERIES

1.3 TECHNICAL CHARACTERISTICS

RF SECTION

- Analog Operation

Frequency Range ........................................................................................................................................................... UHF

Output Power (±0.5dB) ............................................................................................................................................... 1300W

Amplification Class .......................................................................................................................................................... AB

Gain (±2dB) ....................................................................................................................................................................28dB

Technology.............................................................................................................................................Solid State LDMOS

RF Input Connector ................................................................................................................................................ N Female

Impedance.......................................................................................................................................................................50Ω

RF Output Connector (Amplifier / Rack) ........................................................................................... 7/16” Female / EIA 7/8”

Impedance.......................................................................................................................................................................50Ω

- Digital Operation

Frequency Range ........................................................................................................................................................... UHF

Digital Output Power (DVB-T) ............................................................................................................................. 300W RMS

Digital Output Power (ATSC)...............................................................................................................................500W RMS

DVB-T Modes......................................................................................................... All the modes listed in ETSI EN 300 744

DVB-T MER .......................................................................................................................................................> 33dB RMS

DVB-T Shoulders Attenuation (After non-critical mask cavity filter) ................................................................> 40dB RMS

DVB-T Output Spectrum .............................................................................................................Compliant ETSI EN 300 744

A TSC Symbol Rate ...................................................................................... 10.76MBaud/s (Compliant to A TSC Doc. A/53)

A T SC SN R .........................................................................................................................................................> 27dB RMS

A TSC Shoulders Attenuation (After simple mask cavity filter ref. total output power) .....................................> 46dB RMS

A TSC Output Spectrum ......................................................................................................... Compliant to A TSC Doc. A/64

REMOTE CONTROL SECTION

Parallel Interface...........................................................................................................................ON/OFF , Alarms, Interlock

Serial Interface ............................................................................................................................. RS232 or RS485 Selectable

METERING

Output Forward Power (Peak or RMS) Output Reflected Power (Peak or RMS) Unbalance Power Heat sink T emperature Input Power (Peak or RMS) RF Modules Current Power Supply Voltage W orking Timer

INDICATIONS

Cooling Blower W orking (W ith icon on front display) Transmitter Interlock (W ith icon on front display) Alarm (With red LED on front panel) Transmitter ON/OFF (W ith green LED on front panel) Remote ON/OFF (With orange LED on front panel)

PROTECTIONS

Output Forward Power Output Reflected Power Unbalance Power RF Modules Current Power Supply Voltage

PROTECTIONS

Forward Power (Analogue) .........................................................................................................................................1500W

Reflected Power (Analogue) .........................................................................................................................................150W

Forward Power (DVB-T)................................................................................................................................................400W

Reflected Power (DVB-T) ............................................................................................................................................... 40W

Forward Power (A TSC) .................................................................................................................................................600W

Reflected Power (A TSC) ................................................................................................................................................ 60W

Unbalance (Analogue)..................................................................................................................................................300W

Unbalance (DVB-T).......................................................................................................................................................100W

Unbalance (A TSC) ........................................................................................................................................................150W

Temperature ................................................................................................................................................................... 75°C

.......................................................................................................................................................................................................................................................................................................................

18A

Min 10V - Max 33.5V

GENERAL

Power Supply Voltage ............................................................................................................................................. 90 - 260V

Power Supply Frequency ........................................................................................................................................ 50 - 60Hz

Power Factor .................................................................................................................................................................> 0.98

Analog Power Consumption (Black) ......................................................................................................................... 3.45kV A

Digital Power Consumption (DVB-T) .......................................................................................................................... 2.2kVA

Digital Power Consumption (ATSC) ...........................................................................................................................2.5kVA

Housing (Amplifier / Rack) ...................................................................................................................................... 6U / 20U

W eight (Amplifier / Rack)................................................................................................................................... 63kg / 175kg

Airflow ............................................................................................................................................From 330m3/h to 500m3/h

Temperature ..................................................................................................................................................... -5°C to +45°C

Options

- Non critical mask, DVB-T , Output filter

- Critical mask, DVB-T , Output filter

- Stringent emission mask, ATSC, Output filter

AUTV/500LD, 2AUTV/1000LD, 3AUTV/1500LD

1.4 FRONT P ANEL

2 3 51

1. Function keys

2. LCD Graphic Display

3. Status LEDs

4. RS232 Socket

5. RF Monitor Connector

6. Main Switch

RS232 for connection

to PC with ERCoS software

and for firmware upgrade

Pin 2: TX Pin 3: RX Pin 5: GN D

FUSE

1.6 REAR P ANEL

1. Breaker

2. AC 220V OUT Socket

3. AC 400V IN Socket

41. F AN 3.15A Fuse

42. CONTROL BOARD 1A Fuse

43. EXCITER 4/8A Fuse

5. RF IN Connector

6. RS485 Socket

7. EXCITER Socket

8. TELEMEASURES Socket

9. RF OUT Connector

5 97 8

Wired Telemeasures connector

Pin 1: FWD power (Analog out) Pin 2: REF power (Analog out) Pin 3: T emperature (Digital out) Pin 4: Interlock (Digital in) Pin 5: GN D Pin 6-7:Free contact (Digital out)

Closed when Alarm Pin 8: 0V=ON / 5V=Normal (Digital in) Pin 9: 0V=OFF / 5V=Normal (Digital in)

EXCITER for connection

to Driver Module

Pin 1: GN D Pin 2: 0V=Normal / 5V=AGC Alarm

(Digital out)

Pin 3: 0V=Normal / 5V=AGC Alarm

(Digital out) Pin 8: FWD power (Analog out) Pin 9: REF power (Analog out)

RS485 for connection

to RCU or Amplifier Control

Pin 2: RX- Pin 5: GN D Pin 3: RX+ Pin 7: TXPin 4: +5V Pin 8: TX+

Section 2 - Installation

Contents:

2.1 Operating environment

2.2 First installation

2.3 Connection with VEGA Transmitter

2.4 Stand-alone Amplifier configuration in Dual Drive version

2.5 Slave multi-Amplifier configuration with Amplifier Control

2.6 Stand-alone Amplifier configuration with Elettronika RCU

2.7 Stand-alone Amplifier configuration with direct PC connection

100

2.1 OPERA TING ENVIRONMENT

Y ou can install the equipment 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 equipment directly above a hot piece of device. The upper lid can be dismounted to allow an easy internal access. The equipment is designed with a modular design, that is each circuit is realized inside different modules or boards. All interconnections between modules are made by means of connectable cables which allow an easy and quick maintenance of demaged modules.

2.2 FIRST INST ALLA TION

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.

1. Connect 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 Monophase or 400V AC Threephase); if present the Isolator Transformer , the Amplifier is provided with cable and plug;

3. connect the RF OUT Exciter cable to the RF IN connector on the rear panel of the Amplifier;

4. connect the Antenna cable to the RF OUT connector on the rear panel of the Amplifier .

AGC

BREAKER

AC 200V OUT

RF IN

RS485 TELEMEASURES

AC 400V IN

RF OUT

To ANTENNA

To ELECTRIC NETWORK

To EXCITER

RF INPUT

101

When the equipment is put within a combined system it is directly connected to the input splitting and output combining systems. Before fully powering the equipment, 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 CONNECTION WITH VEGA TV TRANSMITTER

AGC

1 2 8

5 8 4

TV AMPLIFIER VEGA

BREAKER

AC 200V OUT

RS485 TELEMEASURES

AC 400V IN

RF OUT

RF IN

To ELECTRIC NETWORK

To ANTENNA

102

2.4 ST AND-ALONE AMPLIFIER CONFIGURA TION IN DUAL DRIVE VERSION

OUT

MAIN

VIDEO

OUT

AUX

AUXMAIN

GND

LEFT OUT

AUX

LEFT

MAIN

LEFT OUT

RIGHT OUT

AUX

RIGHT

MAIN OUT

RIGHT

AUX

MAIN IN

19kHz OUT

DIRECT REMOTE

RF AUX IN RF OUT RF MAIN IN

AUX CTRL

RS232/485

REMOTE

MAIN CTRL

BREAKER

AC 200V OUT

AC 400V IN

RF OUT

AGCRS485 TELEMEASURESRF IN

To ANTEN NA

103

2.5 SLA VE MULTI-AMPLIFIER CONFIGURATION WITH AMPLIFIER CONTROL

BREAKER

AC 200V OUT

AC 400V IN

RF OUT

AGCRS485 TELEMEASURES

2 3 5

AMPLIFIER CONTRO L AMPLIFIER

RF IN

To COMBINER

7 8

From SPLITTER

104

2.7 ST AND-ALONE AMPLIFIER CONFIGURA TION WITH DIRECT PC CONNECTION

2.6 ST AND-ALONE AMPLIFIER CONFIGURA TION WITH ELETTRONIKA RCU

SERIAL PORT

BREAKER

AC 200V OUT

AC 400V IN

RF OUT

AGCRS485 TELEMEASURESRF IN

105

Section 3 - Operation

Contents:

3.1 Operation

3.2 Display

3.3 Menus

3.4 Firmware upgrade

106

3.1 OPERA TION

At startup, after initial image, the display shows the main screen with the RF powers as below:

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 F AILED 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 T able 1.

T able 1: Meanings of the three LEDs on the front panel

Screenshots in this manual are indicative, so they can be different from those on your equipment.

LED COLOUR MEANING MEANING WHEN BLINKING

ON Green The amplifier is on

The amplifier has been turned on locally but it has been turned off by remote

REMOTE Yellow

Remo te co ntrol is enabled

It n ever blin ks

ALARM Red An alarm is present It never blinks

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Electronika LDMOS UHF SERIES User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual