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PRODUCT DATA SHEET
KEY FEATURES
STRATUS
DRM MODUL ATOR /RF EXCITER
Stratus (TXW 5126D) is the versatile confi guration of a DRM modulator/RF exciter designed to feed any AM broadcasting transmitter or linear amplifi cation transmitter.
www.thomson-broadcast.com
Overview
Stratus is designed to feed either linear amplifi cation transmitters or any AM broadcasting transmitter (PDM/PSM type, Direct Digital Synthesis type, etc.).
Stratus can handle multiple audio programs encapsulated in a DRM/DI MDI format as well as one audio input for analog AM broadcasting or for simulcast when combined with a DRM/DI MDI input.
For SFN or SMFN operation, Stratus can be synchronized by means of optional items: either external or internal GPS or through an external NTP server and a 1 PPS time reference.
In order to feed all transmitter types, the internal state of art digital signal processing delivers either:
Phase and amplitude RF modulated • signal for linear amplifi cation transmitters
Analog envelope and phase RF • modulated signal for any broadcasting transmitter
IQ base band signal for Thomson S7HP • transmitter family or any digital RF synthesizer
Digital envelope and phase RF • modulated signal for Thomson broadcasting transmitters
In addition Stratus delivers a non-modulated RF signal by means of an internal digital synthesizer covering the entire AM frequency range.
As a basic feature, Stratus is equipped with an RF feedback to perform automatic and dynamic delay adjustment, ensuring an optimal output signal quality at any frequency.
Stratus control and monitoring is performed using its web-server access or through an optional dedicated front panel.
Service Continuity Facility
The Stratus platform also supports an optional DRM/DI MDI automatic switchover function. You can activate this function to control and to monitor a main and a stand-alone DRM/DI MDI stream;
automatically switch on a stand-alone stream in the event of problems with the main stream; and to recover nominal confi guration when problems on the main stream have been resolved.
Of course, you can also set up redundant confi guration and switchover criteria to comply with your specifi c requirements related to service continuity.
Real Time Channel Coder/Modulator
The coding and modulation functions are performed by means of a powerful embedded digital processing. Stratus can deliver all the standardized DRM digital modes up to 20 kHz bandwidth.
In compliance with the DRM Standard, diff erent protection levels are available to fi t all conditions of propagation from LW/MW daytime fl at channel to the most disturbed SW multipath channels. Stratus may be operated in standard analog AM mode, with/without dynamic control of the carrier, in full digital mode and simulcast mode.
Supports all modes and confi gurations of the DRM • standard
Internal digital RF synthesizer•
Synchronization by external/internal GPS or external • NTP server
Phase modulated RF signal•
Amplitude/phase modulated RF signal•
IQ baseband signal•
DRM/DI MDI automatic switchover function•
Control and monitoring via web-server or dedicated • front panel
Content redundance features, automatic fallback • solutions
Capable of single-frequency network operation • (SFN), multi-frequency network operation (MFN) and synchronized multi-frequency network operation (SMFN)
www.thomson-broadcast.com
SKYWAVE 2000: THOMSON’S ANSWER TO END-TO-END DIGITAL AM BROADCASTING
Digital Integrated Synthesizer
The internal digital RF synthesizer is specifi cally designed with up to date high speed signal processing components in order to ensure the highest output signal quality and spectrum purity from a complex I/Q signal.
The digital synthesizer is able to feed the RF path of most existing broadcast transmitters as it can deliver a non-modulated RF, a phase modulated RF and a phase and amplitude modulated RF.
Such a fl exible synthesizer fulfi ls standard requirements for standard AM analog transmitters and specifi c needs for either linear or non-linear amplifying RF chain delivering DRM complex signal. It is capable to deliver very high signal quality up to 20 kHz bandwidth in full digital modes.
Automatic Delay Adjustment
As particularly interesting feature for AM broadcasters, Stratus off ers a dynamic functionality performing automatic delay adjustment between phase and envelope paths.
A sample of RF output is demodulated and processed by means of an embedded RF demodulator to perform permanent dynamic adjustment. This ensures the best performance (out-of-band emission, shoulder) for any selected frequency and transmission mode.
SFN Operation
Since SFN networks require all transmitter signals to be bit identical, the modulator clocks at the diff erent transmitting sites must be synchronized. Therefore Stratus is able to be synchronized by means of optional items: internal or external GPS receiver or through external NTP server and 1 PPS time reference.
Operation and Control
A web-server facility provides appropriate means for Stratus full remote control and monitoring.As an option, Stratus can be equipped with a Thomson dedicated front panel allowing local control and monitoring.
From Studio to Digital AM Transmitters, Auxiliaries, Antennas and more, Thomson is your best choice for a crystal clear DRM signal on air.
www.thomson-broadcast.com
FUNCTIONAL BLOCK DIAGRAM OF THE STRATUS SYSTEM
Photos of Stratus without and with dedicated front panel
This front panel is equipped with a screen with interactive menu, a bar graph displaying the output level and eight LEDs. These LEDs indicate faults with red color, warnings with orange color and normal operation with green color.
By having a quick look at the LED color, the operator gets information related to the global status and can also select any detailed information to be displayed on the LCD screen. As an option, Stratus can be equipped with a Thomson dedicated front panel allowing local control and monitoring.
PRODUCT DATA SHEET
SPECIFICATIONS
Transmission Characteristics
Standard: IEC 62272-1
Transmission structure: COFDM, analog AM
Signal bandwidth: 4.5, 5, 9, 10, 18 and 20 kHz
Frequency band:
LW: 148.5 ÷ 283.5 kHz
MW: 525 ÷ 1705 kHz
SW: 2.3 ÷ 26.1 MHz
Best RF performance:
using automatic delay adjustment function
Single Frequency Network (SFN/SMFN):
Optional item, either internal or external GPS receiver or through NTP server and 1 PPS time reference
Options
Dedicated front panel •
SFN and SMFN capabilities •
Service continuity facility •
Environmental Conditions and Safety Standards
Guaranteed specifi cations: 0° ÷ 45° C up to 3000 m
Relative humidity: ≤ 95% without condensation
Electrical Mechanical and Cooling Characteristics
Rack: 19”; 2U; depth = 450 mm
Weight: < 10 kg
Air cooling: Internal fan
Mains Power Supply
Power supply: 95 VAC to 264 VAC - 150 W
Standard voltages: Automatic select 110 V / 240 V ± 10%
Frequency: 50 / 60 Hz (± 2 Hz)
MPEG-2-AAC is a FhG technology
Audio coding technology licensed by Fraunhofer IIS
http://www.iis.fhg/de/audio/
Input Characteristics
Output Characteristics
Input Type Connector Frequency Level Impedance Return LossRS 232/DI RS 232 DB9
Eth Ethernet RJ45 female 10/100 Mbaud
Eth/DI Ethernet RJ45 female 10/100 Mbaud
DIGITAL AUDIO (stereo) AES/EBU XLR3 female Sample standard from 22.05 kHz ÷ 48 kHz
ANALOG AUDIO (stereo) Analog 2*XLR3 female 20 kHz max ± 3 V 600 ohm balanced
RF Feedback Analog BNC female 50 kHz ÷ 26.1 MHz From -20 dBm - 0 dBm 50 ohm > 15 dB
RF GPS Analog SMC 50 ohm > 15 dB
Output Type Connector Frequency Level Impedance Return LossDemodulated IQ AES EBU XLR3 male IQ sample at 48 kHz
Phase & Amplitude Modulated RF
Analog BNC female 50 kHz ÷ 26.1 MHz From 0 ÷ +13 dBm (single carrier)
50 ohm > 15 dB
Unmodulated RF Analog sinus BNC female 50 kHz ÷ 26.1 MHz 13 dBm 50 ohm > 15 dB
Analog Envelope Analog BNC female 1.5 MHz max 6 Vpp 20 mA max
< 10 ohm
IQ Baseband AES/EBU XLR3 male IQ sample at 48 kHz
www.thomson-broadcast.com
PR ODUCT DATA SHEET
Our professional services offerings ensure optimal system performance and maximize uptime. These services include call centers staffed around the clock; system planning, design, and commissioning; professional training courses; and technical maintenance programs and service agreements.
www.thomson-broadcast.com
PROFESSIONAL SERVICES
Financing is available through Thomson Broadcast financial services. Please contact your products representative for more details.
FINANCING
Thomson Broadcast1, rue de l’Hautil 78700 Conflans Sainte Honorine FRANCE
HEADQUARTERS
Thomson Broadcast – All rights reserved. Thomson is a trademark of Technicolor SA. All other trademarks referenced are trademarks, registered trademarks,or service marks of their respective companies. Specifi cations subject to change without notice. ©ATAS/NATAS. Photo credits: Thomson. CDT-120509