Digital Liquid Cooled UHF TV Equipment 5K2 DD, MEDIAFLO SIRIUS 12089 Descriptive and Functional Manual 45321648.01 Numéro / Number : 33 (1) 34.90.32.55 : hotline@thales-bm.com 104 Doc. A E Rev. Langu.
Table of content 1. Information contained is this document is confidential, is THOMSON property and cannot be disclosed in whatever form without prior written authorization of THOMSON. 2. Generale description ........................................................................................7 1.1. Outline ............................................................................................................. 7 1.2. Simplifier description of transmitter........................................
Information contained is this document is confidential, is THOMSON property and cannot be disclosed in whatever form without prior written authorization of THOMSON. 3.3. 3.2.1. Introduction ................................................................................................ 39 3.2.2. Applications ............................................................................................... 40 3.2.3. SIRIUS Description.......................................................................
Information contained is this document is confidential, is THOMSON property and cannot be disclosed in whatever form without prior written authorization of THOMSON. 3.7. 3.6.13. Mechanical Characteristics........................................................................ 68 3.6.14. Electrical Characteristics ........................................................................... 68 Central Processing Unit (CPU-TH860)........................................................ 69 3.7.1. Outline..
Information contained is this document is confidential, is THOMSON property and cannot be disclosed in whatever form without prior written authorization of THOMSON. 3.13. 3.14. 4. 5. 3.12.1. Outline 97 3.12.2. Indicator lamps and message displays.................................................... 100 3.12.3. Test points and adjustment controls........................................................ 100 3.12.4. Protection and surveillance devices ................................................
5.1. 5.1.1. Cabinet inter-unit connections ................................................................. 118 5.1.2. Connections between Central Processing Unit and user interfaces ....... 119 5.1.3. Connections between cabinet and filter unit............................................ 119 Location of principal connectors..............................................................
Digital Liquid Cooled UHF TV Equipment Generale description 1. General description 1.1. Outline The purpose of the transmitter is to broadcast a digital signal by modulating a carrier in the UHF and VHF bands. The transmitters can operate with the ATSC , DVB-T or MEDIAFLO standards. Information contained is this document is confidential, is THOMSON property and cannot be disclosed in whatever form without prior written authorization of THOMSON.
Digital Liquid Cooled UHF TV Equipment Information contained is this document is confidential, is THOMSON property and cannot be disclosed in whatever form without prior written authorization of THOMSON. Generale description 06-077B(e-f) 06-078B(e-f) 9946 V1 45321648.01 Numéro / Number 104 Doc. A E preliminary Rev. Langu.
Digital Liquid Cooled UHF TV Equipment Generale description 1.2. Simplifier description of transmitter 1.2.1. Basic operation The MPEG-2 input signals are fed to the exciter inputs, they are converted into digital I and Q components and are then transposed into RF signals and pre-amplified.
Digital Liquid Cooled UHF TV Equipment Generale description CONTROL PANEL CABINET (S) Information contained is this document is confidential, is THOMSON property and cannot be disclosed in whatever form without prior written authorization of THOMSON. CENTRAL PROCESSING UNIT CENTRAL CONTROL SYSTEM CRATE Channel 1A Channel 2A Adapt.
Digital Liquid Cooled UHF TV Equipment Generale description Each digital exciter consists of: • A SIRIUS rack with : A DVB-T (Europe) modulator board , ATSC (America) modulator board or MédiaFLO modulator board a processing signal board, an RF synthesiser, a preamplifier, a Very Low Voltage power supply, Information contained is this document is confidential, is THOMSON property and cannot be disclosed in whatever form without prior written authorization of THOMSON.
Mains Input 45321648.01 Numéro / Number 104 Doc.
Digital Liquid Cooled UHF TV Equipment Detailed operational description 2. Detailed operational description 2.1. Introduction The main transmitter functions are as follows: ♦ transmission, ♦ control, Information contained is this document is confidential, is THOMSON property and cannot be disclosed in whatever form without prior written authorization of THOMSON. ♦ mains distribution, ♦ Cooling. Two individual sections have been devoted to the last two functions. 9946 V1 45321648.
Digital Liquid Cooled UHF TV Equipment Detailed operational description 2.2. Transmission function 2.2.1. Operational description of digital exciter The exciter (EMB) transposes the input base-band MPEG signal into an RF signal using a local frequency oscillator from a synthesiser.
Digital Liquid Cooled UHF TV Equipment Detailed operational description RF Feedback (from RF filter output) RF Feedback (from TX output) Feedback ALE Switch Wide band Down/conversion IF RS232 External inputs 10 MHz 1 pps Information contained is this document is confidential, is THOMSON property and cannot be disclosed in whatever form without prior written authorization of THOMSON.
Digital Liquid Cooled UHF TV Equipment Detailed operational description 2.2.4. Amplification of the RF signal The output RF signals from the exciters are low power signals. This signal is sent to the inputs of the amplifiers, which are mounted in trays and are all connected in parallel. The following shows the number of amplifier modules as a function of the transmitter power.
Digital Liquid Cooled UHF TV Equipment Detailed operational description RF AMPLIFICATION EXCITER AMPLIFIER TX Board RF ATTENUATOR AMPLIFIER RF signal ATT. GAIN CONTROL AGC voltage Amplifier voltage N Information contained is this document is confidential, is THOMSON property and cannot be disclosed in whatever form without prior written authorization of THOMSON.
Digital Liquid Cooled UHF TV Equipment Detailed operational description 2.3. Description of the overall transmitter control system 2.3.1. Introduction The overall control system for the various transmitter units is supervised by the Central Processing Unit (CPU).
Digital Liquid Cooled UHF TV Equipment Detailed operational description Delays and time lags in equipment The back-up functions are totally hardware based; the CPU board stores data according to the type of event and provides a fault display system.
45321648.01 Numéro / Number Sondes RF/RF probes 104 Doc.
Digital Liquid Cooled UHF TV Equipment Detailed operational description 2.3.3. Polling of operator commands The Central Processing Unit (CPU) receives the operator commands sent from the Local Control Panel (PCL) or a remote user interface. These commands are taken into account by the following systems: ♦ PCL windows and indicator lamp control system, ♦ Command control system.
Digital Liquid Cooled UHF TV Equipment Detailed operational description After a start command from the CPU a delay of 20 seconds (CPU software) is applied to the detection of transmitter RF faults. Information contained is this document is confidential, is THOMSON property and cannot be disclosed in whatever form without prior written authorization of THOMSON.
45321648.01 Numéro / Number Sondes RF/RF probes 104 Doc.
Digital Liquid Cooled UHF TV Equipment Detailed operational description 2.3.5. Processing of faults 2.3.5.1. Outline Faults are detected by sensors (liquid flow/air pressure, temperature and reflectometer probes) and surveillance devices inside the units (power supplies, SWR protection, ...). Fault signals from these sensors are picked up: ♦ either by a loop protection system in the multiplex card, ♦ or by the fault processing system in the Central Processing Unit.
45321648.01 Numéro / Number 104 Doc.
Digital Liquid Cooled UHF TV Equipment Detailed operational description Input liquid temperature fault An "input liquid temperature" fault signal from the sensor in the internal cooling system sends a command to lower the transmitter power by 6 dB.
Digital Liquid Cooled UHF TV Equipment Detailed operational description However this changeover command is not confirmed if the Reserve exciter is currently on-air or one of the following faults signals is received from the Reserve exciter: ♦ reserve exciter fault, ♦ no MPEG-2 signal at input.
Digital Liquid Cooled UHF TV Equipment Detailed operational description In a transmitter configuration containing several cabinets, each cabinet has its own protection system controlled by the multiplex card. The two loop protection systems are connected together so that open circuiting the first either one will cause the shutdown of the cabinet. The protection systems are identical on both cards with the exception of the station protection. In the case of a 3.
Digital Liquid Cooled UHF TV Equipment Detailed operational description 2.3.7. Data transfer between exciter and CPU Basically the relationship between the Digital EMB and the UC Transmitter system can be categorised as following: ♦ exchanges related to the basic working conditions: starting, restarting, stopping, safety ... ♦ exchanges related to the configuration of the Digital Exciter: modulator configuration (modes of modulation, by pass of functions ...
Digital Liquid Cooled UHF TV Equipment Detailed operational description 2.4. User interface operation 2.4.1.
Digital Liquid Cooled UHF TV Equipment Detailed operational description 2.4.2.2. Window control system The window control system effects a real time update on the data base which contains the data to be displayed in the various windows of the PCL or the remote user interface. The updated data are sent to the PCL and to the remote user interface. Hence the database is duplicated in the following sub units: ♦ Central processing unit, ♦ PCL, ♦ Remote user interface.
45321648.01 Numéro / Number 104 Doc. Update Update Call-up request for type A windows A E preliminary 9946 V1 Rev. Langu.
Digital Liquid Cooled UHF TV Equipment Detailed operational description 2.4.3. Power level bargraphs on PCL The processing of the command signals which activate the PCL indicator lamps is mainly derived from data from the "polling of events" system.
Digital Liquid Cooled UHF TV Equipment Detailed operational description 2.4.4. Log book control system Each new event, which is detected by the system, is recorded in the logbook; each event is given a title and is dated. The last 500 events can be stored. The operator has the facilities to control the flow of information which is sent to the log book terminal by using the Local Control Panel. 2.4.5. 2.4.5.1.
Digital Liquid Cooled UHF TV Equipment Description / Test points / Location of units 3. Description / Test points / Location of units 3.1. System architecture and location of transmitter units The Dual Drive version of the transmitter consists of the following units: ♦ a unit containing two exciters in a redundant switchover system whereby a faulty exciter is replaced by the other. After digital processing, it transposes the input MPEG signals into a RF output.
Digital Liquid Cooled UHF TV Equipment Description / Test points / Location of units ♦ A remote user interface (optional) with facilities for remote control of the transmitter. Simple Drive transmitter Information contained is this document is confidential, is THOMSON property and cannot be disclosed in whatever form without prior written authorization of THOMSON. The Single Drive version is physically different from the Double Drive version in that it only has one digital exciter . 9946 V1 45321648.
Digital Liquid Cooled UHF TV Equipment Description / Test points / Location of units Information contained is this document is confidential, is THOMSON property and cannot be disclosed in whatever form without prior written authorization of THOMSON. 3.1.1.
Information contained is this document is confidential, is THOMSON property and cannot be disclosed in whatever form without prior written authorization of THOMSON. Digital Liquid Cooled UHF TV Equipment Description / Test points / Location of units Figure 9 : Localisation of the mains units in rear of the cabinet B860 R1 to R10 Loads network for the F.I.C.
Digital Liquid Cooled UHF TV Equipment Description / Test points / Location of units 3.2. Rack : SIRIUS DVB-T UHF 45321627.11 3.2.1. Information contained is this document is confidential, is THOMSON property and cannot be disclosed in whatever form without prior written authorization of THOMSON. The Introduction sirius exciter is a key element for Media FLOTM transmitting technolongy The quality of coding and modulation is particularly important to the MediaFLO process.
Digital Liquid Cooled UHF TV Equipment Description / Test points / Location of units 3.2.2. Applications The sirius exciter is designed to serve three functions for MediaFLO, i.e., channel coding, RF modulation and manages analogue interface to the transmitter. The exciter, which complies with the MediaFLO Air interface specification, provides the basic functions of converting an MPEG transport stream and converting the resulting data to a MediaFLO modulated IF signal.
Digital Liquid Cooled UHF TV Equipment Description / Test points / Location of units 3.2.3. SIRIUS Description The inputs are MPEG transport stream(s) carrying information about the program content, the number of programs and the program data. The standard MPEG transport stream format is ASI (Asynchronous Serial Interface). Before modulation the signal is subjected to a heavy error protection process and various interleaving processes.
Digital Liquid Cooled UHF TV Equipment Description / Test points / Location of units Information contained is this document is confidential, is THOMSON property and cannot be disclosed in whatever form without prior written authorization of THOMSON. 8A 2 4 3 5 13 6 1 12 9 7 11 8 10 06/103(e-f) 9946 V1 45321648.01 Numéro / Number 104 Doc. A E preliminary Rev. Langu.
