THOMSON TSW 2250 D

GENERAL DESCRIPTION

250 kW INTEGRATED DRM SW SINGLE TUBE TRANSMITTER

photo Thomson TSW 2250 D

DRM INTEGRATED SOLUTION

THE HIGHEST FLEXIBILITY FOR OPTIMUM PROFITABILITY

The TSW 2250 D is an updated improved version of the well known and field proven 250 kW single tube SW transmitter from Thomson Broadcast & Multimedia. The TSW 2250 D, is the first real Dual-Mode analogue and DRM (Digital Radio Mondiale) high power broadcasting transmitter, and continues the long standing Thomson tradition of innovation in this domain. In addition to high quality state of the art analogue and DRM modulator, the TSW 2250 D benefits from an up to date control system with Web server and SNMP agent and from huge improvements to all the component protection systems in order to take into account the specific DRM waveform with its particularly high crest factor.

In addition to the best performance in the domain in term of digital operation, the TSW 2250 D continues to provide the highest level of redundancy for maximum service availability in combination with a very high level of reliability, ease of installation, operation and maintenance and the most attractive cost of ownership.

Optimized single block transmitter architecture

The TSW 2250 D, although very compact and fully self contained provides full accessibility to any LRU (Line Replaceable Unit) including the LV High Power Main transformer. It benefits from a reduced number of external interfaces, and the self contained architecture guarantees fast and easy installation. The highly functional architecture is based on maximum use of plug-in modules and comprises :

Built-in Dual Mode modulator/RF exciter allows operation in Analogue or DRM or simulcast mode. It is based on state of the art high level of integration using DSP (digital signal processing) components and includes the following functions.

DRM features derived from Thomson standalone DRM versatile modulator/RF exciter (Stratus TXW 5126 D). This advanced highly integrated design results from extensive experience gained all over the world since 1999 during DRM field tests and transition period of introduction of DRM services. From an incoming DRM/DI/MDI stream, this unit digitally processes very high quality I/Q base band signals to generate all the standardized DRM modes. Its analogue or digital AES/EBU local audio input allows traditional AM standard broadcast services and simulcast modes by combining with the incoming DRM/DI/MDI stream

Envelope signal generation : from the I/Q base band signal, powerful digital processing computes the envelope to generate the modulation via a high speed serial link over fiber optic lines to control the TSM power switching modules

Digital synthesizer : from the I/Q base band signal, powerful digital processing generates the RF phase modulated signal to feed the RF path of the transmitter

On-air signal optimisation : from the transmitter output RF feedback an embedded pre-correction process and automatic dynamic delay adjustment process ensure optimal transmitter output performance

High level Solid state Modulator (TSM-D) : is a digitally upgraded version of the efficient air-cooled Thomson Solid state Modulator offering exceptional audio and digital performance. The envelope signal is transformed using the latest developments in digital signal processing into a single high speed control signal for the power switching modules. This control signal (serial) is then transformed to individual control signals (parallel) for the switching modules. This end to end digital stream up to the generation of the modulated HV, minimizes the number of digital to analogue conversion to provide the highest level of performance. As with the previous generation the switching strategy ensures equal loading of all TSM-D modules whatever the modulation depth or the output power. An automatic recovery strategy detects and eliminates any malfunctioning of the switching modules allowing continued high quality operation even with multiple faulty modules.

RF chain comprises a wide band Solid state IPA (Intermediate Power amplifier) and a single tube low stress high power stage.

The wide band Solid state IPA :

covers the whole frequency range without any adjustment
offers active redundancy due to its modular architecture
benefits from enhanced real time protection devices with improved protection for the active components in case of over current, over voltage and excessive VSWR

The field proven low stress single tube RF stage :

offers the highest efficiency of its power class
ensures high reliability due to oversized components (500 kW carrier power rated)
based on highly reputed TH558 Thomson tetrode tube

User friendly transmitter Control System

provides complete transmitter control and monitoring

by means of a touch screen on the front panel of the transmitter for local operation
through an embedded web server by means of any standard web browser for extended and/or remote operation
through an embedded SNMP agent by means of a dedicated SNMP manager

provides global transmitter overview during normal operation as well as detailed information down to each sub-function for advanced investigation of transmitter status

logbook function event-by-event with filtered sorting capability according to operator's selection
fault diagnosis and assistance facility providing efficient technical support to the operator from problem investigation up to recovering full transmitter operational performance

TECHNICAL SPECIFICATIONS
	Full Digital	Analogue AM
Modulation	DRM standard (ETSI ES 201 980) MFN - SFN - SMFN	DSB : A3E (incl. DCC) SSB : H3E / R3E
	Simulcast using local audio (analog or digital AES/EBU) input
Frequency Range (MHz)	5.95 - 26.1 MHz (standard) 3.9 - 26.1 MHz (optional) Stability : 1x10-9/day Frequency Change less than or equal to 15 s for preset channels
RF Output Power	Full DRM less than or equal to 160 kW rms	Carrier : 250 kW (A3E)
	Continuously adjustable from 0% to 100%
Output Impedance	50 ohm unbalanced 75 ohm unbalanced (Option) 300 ohm balanced (on request)
Permissible VSWR	less than or equal to 2 with rated power less than or equal to 3 with automatic power reduction
Mains Power Supply Frequency Power factor	400 V (±6%), 3-phase and neutral 50 or 60 Hz (±2%) more than 0.93 at nominal operation
Overall Efficiency (standard cooling included)	DRM : 70% - Typical 72%	Analogue : more than 75% - Typical 77%
Performances	Out of Band : Compliant ETSI EN 302 245-2 MER : more than or equal to 30 dB Compliant ETSI EN 302 245-1 (for bandwidth up to 10 kHz)	AF response : ±1 dB (55 - 7500 Hz) AF distortion : less than or equal to 3.5% (55 - 7500 Hz) Noise level : less than or equal to 56 dB rms unweighted
Operation	Local control through 15" touch screen Full remote control via embedded web-server and/or SNMP agent
Environmental Conditions	Ambient temperature : +1° to +45°C Maximum humidity : 95% non-condensing
Dimensions	5600 mm (L) x 2100 mm (W) x 2200 mm (H)
Personnel Safety	IEC 215, EN 60215
Specifications may change without notice

TUBE COMPLEMENT
RF stages		AF stages and modulator
Number	Type	Number	Type
1	TH558

THIS TYPE OF TRANSMITTER IS INSTALLED IN THE FOLLOWING COUNTRIES
	ITU	Country	ITU	Country
	F	FRANCE	TCD	CHAD