THOMSON TSW 2500 D

GENERAL DESCRIPTION

THOMSON TSW 2500 D DIGITAL DRM 500 KW SHORT WAVE TRANSMITTER

photo Thomson TSW 2500 D

THALES RESPONDS TO DIGITAL CHALLENGE

LEADING DRM SHORTWAVE IMPLEMENTATIONS

Integrated DRM Solutions

True to its tradition of combining innovative technology with reliable and time-tested techniques, Thomson is offering an enhanced and upgraded shortwave line for integrated DRM solutions.

The revolutionary, new Thomson 500 kW shortwave transmitter, TSW 2500 D, enables broadcasters to choose between classical AM Analog and/or DRM Digital operation.

Market leader for 100 to 500 kW power level since the early 90'ties, Thomson high power shortwave systems are based on field-proven equipment enhanced by modern technology and know-how.

An invaluable asset for any high power broadcast station, the TSW 2500 D is designed to fit a wide range of consumer specific equipment and sub-systems especially designed and engineered by Thomson to make day-to-day broadcasting more efficient.

The TSW 2500 D is equipped with interfaces for remote and automated operation and is ready for new age digital transmission (DRM).

Renowned for its superior qualities, high overall efficiency, sophisticated remote control facilities and rugged, day-to-day reliability, the new digital TSW 2500 D is the best choice for long-term, flexible operation.

Features of the TSW 2500 D especially adapted for DRM include:

Compatibility with DRM frontend equipment
Automatic changeover from AM to DRM operation
Automatic RF frequency tuning, in AM and DRM mode
Preset functions for DRM operation (transmission settings)
Interface for automated and remote operation

Radio Frequency Stages

The TSW 2500 D is fitted with a small triode in grounded grid configuration as driver circuit for the final stage tetrode. The preliminary amplifier is a semiconductor wideband design.

Stratus, the new Thomson digital versatile Modulator/RF Exciter serves as radio frequency source.

The Stratus can handle analog and digital transmission modes. It accepts a DRM/DI (Digital Radio Mondiale/Distribution Interface) data stream.

TSW 2500 D goes Digital

DRM is bringing a bright new future for AM broadcasting. Who could have imagined 10 years ago that it would be possible today to reach listeners beyond thousands of kilometers around the globe with crystal clear sound in near FM quality!

Attractive options for broadcasters and listeners are revitalizing keen interest in short wave services. As one of the most cost-effective, reliable technologies in the world, AM radio broadcasting is still the favored medium for keeping millions of listeners informed.

ARCHITECTURE & ENVIRONMENT

FLEXIBLE, DEPENDABLE AND TIME-TESTED

PSM - Thomson Solid State Modulator

At the heart of every TSW 2500 D is a Thomson solid-state Pulse Step Modulator (PSM). Based on robust and straightforward design, the Thomson PSM has been often copied, but never surpassed.

More than twenty years of field experience with PSM technology guarantee that the Thomson PSM modulator is the top-of-the-line, offering

lower energy and operating costs (superior efficiency, better than 97%)
high power-factor
full digital control system
outstanding signal to noise ratio
high reliability and availability based on fully redundant design
easy failure analysis and therefore short downtime due to Built-In Test Equipment (BITE)

The PSM is equipped with 48 power modules, designed as 24 dual modules. Each of the 48 modules represents an individual voltage source that can be switched on or off independently of each other. The dual switching modules are available in either forced air or water cooled version and are capable of 90 A peak current and 1150 V output level.

Enhanced Transmitter Control System

ECOS2 (Enhanced COntrol System) is the new computer based transmitter control system for all Thomson shortwave transmitters. The system is available with or without DRM functionality.

ECOS2 controls and monitors all processes inside the transmitter and provides clearly visible and audible alarm notifications. It provides a simple and well-structured user interface on the integrated color touch screen monitor. ECOS2 allows operators to control the transmitter either locally or from a remote PC. Remote access by FTP is also supported.

The ECOS2 Human Machine Interface (HMI) provides.

a main screen showing current operating values of the transmitter
an event screen with all recent events, featuring various filtering and sorting possibilities
two tuning data screens, where the tuning data used for the automatic tuning functionality can be viewed
two configuration screens to configure alarm limits and other settings

ECOS2 is based on a well proven industrial PC. This allows modren functionality such as network or USB connectivity, to be combined with the high reliability and availability of service to which Thomson customers are accustomed.

ECOS can be integrated into Thomson StationMaster Control Systems, as well as into third party control systems. The industry standard SNMP agent and FTP protocols are also supported.

Automatic Tuning System

The automatic tuning system has been designed according to latest developments in control technology. A large number of preset values enable quick and reliable coarse positioning. The algorithm required for fine positioning has been redesigned with reference to the latest realizations in control technology.

Consistent use of the possibilities offered by modern microprocessor technology and innovative engineering have resulted in a flexible and reliable tuning system. This comprises storage as well as evaluation of previous tuning data and the optimization of the actual tuning state during operation.

TECHNICAL SPECIFICATIONS
	DRM Digital	Analog AM
Modulation	DRM standard (ETSI ES 201 980)	DSB : A3E (option A3E with DCC)
Frequency Range (MHz)	5.95 - 26.1 MHz (standard) 3.9 - 26.1 MHz (optional) Frequency Change : 30 sec. max
RF Output Power at P_nom	250 kW mean power with 9 dB crest factor	Carrier : 500 kW
Output Impedance	50 ohm unbalanced or 300 ohm balanced (option)
Permissible VSWR	2.0 at 50 ohm unbalanced 1.7 at 300 ohm balanced
Mains Power Supply	3 - 24 kV, 3-phase 400 V, 3-phase and neutral
Frequency	50 or 60 Hz (±2 Hz)
Power Factor	More than or equal to 0.95 at nominal AM output power
Overall Efficiency at P_nom (standard cooling included)	More than or equal to 70% typical more than or equal to 72%	More than or equal to 75% more than or equal to 77%
Performance	Out of Band : Compliant ETSI EN 302 245-2 MER : more than or equal to 30 dB Compliant ETSI EN 302 245-2 (for bandwidth up to 10 kHz)	AF response : ±1 dB (50 - 7500 Hz) AF distortion : less than or equal to 3.5% (75 - 7500 Hz) Noise level : less than or equal to 60 dB rms unweighted
Audio Input	DRM/DI	Analog: 0 - 20 dB at 600 ohm balanced Digital: AES3, IEC 60958 and EBU 3250
Operation	Local control through 15" touch screen Remote control via embedded SNMP agent or DF1 protocol
Remote Supervision	Via embedded FTP server
Environmental Conditions	Ambient temperature : +1° - +45°C Maximum humidity : 95% non-condensing
Dimensions	RF Cabinet: (LxWxH) : 4800 mm x 1600 mm x 2100 mm PSM: (LxWxH) : 3250 mm x 1300 mm x 2000 mm
Personnel Safety	IEC 215, EN 60215
Specifications may change without notice

TUBE COMPLEMENT
RF stages		AF stages and modulator
Number	Type	Number	Type
1	TH576
1	CTK 12-1

THIS TYPE OF TRANSMITTER IS INSTALLED IN THE FOLLOWING COUNTRIES
	ITU	Country	ITU	Country
	CHN	CHINA	HOL	NETHERLANDS