паспорт Tcx311

Transcript

Mini modular headend MMH3000 8. Technical specifications RF output parameters Modulation Bandwidth Guard interval Code rate Mode RF output frequency RF offset (7 MHz) RF offset (8 MHz) Attenuation Output level, typical Carrier stability MER Output impedance RF input parameters Modulation Input frequency Input level Input impedance Loop through gain Max. symbol rate Multiplexing parameters Input bit rate Output bit rate Input services PID filter Version monitoring PMT PAT SDT PCR restamping EPG (EIT) multiplexing Other parameters Supply voltage Current consumption Operating temperature range Dimensions /Weight QAM16, QAM32, QAM64, QAM128, QAM256 47- 862 MHz 35 - 90 dBμV 75 Ω -2 ... +2 dB 7200 kSymb/s ≤ 100 MBit/s 53.8 MBit/s (modulator bandwidth limited) ≤ 256 ≤ 256 Yes No No Yes Yes 5.5 ± 0.1 V 1.5 A see UC360, UC380 manuals technical characteristics 47.5 x 117 x 220.5 mm/ 0.7 kg Caution. Electrostatic discharge caution. The module contain electrostatic sensitive components. To minimize electrostatic discharge, observe the following precautions: - Do not remove module from their antistatic plastic bag until you are ready to install it into the basic unit. - Hold the module only by the front panel of module. - Do not place the module on an unprotected surface. Immediately after you remove a module from the basic unit, you must insert it into its antistatic plastic bag. - When the module is not in use, keep it in their antistatic plastic bag. - Do not ship or store module near strong electrostatic, electromagnetic or radioactive fields. This product complies with the relevant clauses of the European Directive 2002/96/EC. The unit must be recycled or discarded according to applicable local and national regulations. DVB-T QPSK, QAM16, QAM64 7 MHz, 8 MHz 1/4, 1/8, 1/16, 1/32 1/2, 2/3, 3/4, 5/6, 7/8 2k 110...860 MHz by 0.5 MHz step -125 kHz, 0, +125 kHz -166 kHz, 0, +166 kHz 0...15.5 dB by 0.5 dB step 90 dBμV ±1.5 dB ± 500 Hz ≥ 35.0 dB 75 Ω Equipment intended for indoor usage only. TERRA confirms, that this product is in accordance to following norms of EU EMC norm EN50083-2 and safety norm EN60065. TERRA confirms, that this product is in accordance to following norms of Russian Federation: EMC ГОСТ Р 51318.22-2006, ГОСТ Р 51318.24-99, ГОСТ Р 51317.3.2-2006, ГОСТ Р 51317.3.3-2008 and safety norm ГОСТ IEC 60950-1-2011. Draugystes str. 22, LT-51256 Kaunas, Lithuania, tel.: +370 37 - 31 34 44, fax: +370 37 - 31 35 55 E-mail: [email protected], http://www.terraelectronics.com QAM (DVB-C) to QAM (DVB-T) transmodulator tcx311 1. Product description The tcx311 is DVB-C receiver with DVB-T modulator and transport stream remultiplexer. It is intended to receive DVB-C signal, filter services or modify parameters of transport stream and convert it into DVB-T again. Transmodulator is intended to use in the MMH3000 headend. tcx311 is designed in accordance with standard EN60728-5 grade 2. The unit is intended for indoor usage only. RoHS compliant. 2. Safety instructions Any repairs must be performed by a qualified personnel. Module shall not be exposed to dripping or splashing water and no objects filled with liquids, such as vases, shall be placed on it. Avoid placing module next to central heating components and in areas of high humidity. No naked flame sources, such as lighted candles, should be placed on module. If the module has been kept in cold conditions for a long time, keep it in a warm room no less than 2 hours before plugging into the mains. The ventilation should not be impeded by covering with items, such as newspapers, table-cloths, curtains. 3. External view and operating control [1] - ADDRESSED - indicator of addressing [2] - STATUS - indicator of module's status [3] - MPEG2 TS - TS output connector [4] - RF input of DVB-C signal [5] - RF loop through output [6] - fixing screws Figure 1. External view of the module 4. Installation instructions Read the instruction first. Disconnect base unit from the mains before insertion/changing the module. How to insert module into the base unit, see user manuals of base units UC360, UC380, chapter ''INSERTION/CHANGING OF THE MODULE''. RF input signal can be connected directly to [4] connector, or via loop through outputs of other modules. Any other module's DVB-C RF input can be connected to tcx311 loop through output [5]. Comments of the front panel indicators: [ 1 ] - ADDRESSED indicator. Indicator lights green when the module is addressed on Terra Bus bus. Blinking indicator indicates addressing error. [ 2 ] - STATUS indicator. In case of any error indicator lights red. It will start blinking at power on to indicate a starting up status. The module is ready when indicator blinking stops. 5. Default settings DVB-C input parameters - Modulation: - Input Frequency, kHz: - Symbol rate, kSym/s: QAM256 474000 6875 DVB-T output parameters - Modulation QAM64 - Bandwidth: 8 MHz - Guard interval: 1/32 - Code rate: 7/8 - Cell ID: 0 - RF: Off - Saw filter: Off - RF Frequency: 474 MHz - RF Offset: 0 kHz - Attenuator: 0.0 dB OFDM Output stream parameters - Transport Stream ID: 1 - Network ID: 1 - Network Name: none - Date/Time source: DVB-C input - Timing zone: 0 GMT - NIT: disabled - EPG Multiplexing: enabled 6. Operating Device receives DVB-C signal and outputs transport stream to connector [3] transparently (without any modification). This signal can be connected to other devices of MMH headend, which accepts TS. System processes incoming transport stream (measures bitrate, generates PSI, filters services, restamples PCR, multiplexes EPG) and passes to modulator. System monitors PMT tables (up to 32), and updates the output of multiplexer if any changes detected (for ex., new stream detected, new descriptors added or removed). All parameters can be setup via user friendly graphic interface, which supports TerraLink, CMHMaster software. "Home" tab of tcx311's control panel will appear when device was selected (see corresponding software user manual). See Figure 2. Figure 2. Home tab of tcx311 control panel Three sections exist on this page. "Input channel" table shows parameters of incoming transport stream (DVB-C demodulator). "Signal status" shows transport stream detection status. "Bit Rate" shows bit rate of incoming transport stream. "Output channel" table shows parameters of outgoing transport stream. "Max. Bitrate" - this is the maximum available output bit rate according to OFDM modulation parameters. "Current Bitrate" shows bitrate of outgoing transport stream. "Used bandwidth" value calculated from previous two values, and indicates the percentage of used bandwidth. NOTE: Ensure that used bandwidth would not exceed 95%. Otherwise bit rate overflow would occurs. In case of bitrate overflow error, indicated bitrate values will be inaccurate because a device can not measure bitrate in such error condition. "System status" table indicates main information about the device (device name, serial number, software and hardware version, internal temperature, system time). This table also will show all errors of device operation. 2 Input stream => Rescan Command will erase previous list of services and rescan new list. After scanning all services are disabled. Each service must be enabled individually. Input stream => "Enter" key will toggle selection of the service. If the second char has "^" sign, it means that the service is selected. Otherwise it is disabled. Input stream => Save & Run Will save all information, generates all SI tables and run with new settings. Input Params => Input Freq. Input frequency, MHz. Input Params => Symbol Rate Input symbol rate. Input Params => Modulation The modulation of input signal. OFDM Params => Modulation Allows to select the modulation (constellation) between QPSK, QAM16 and QAM64. OFDM Params => Bandwidth Allows to select the bandwidth of the RF output between 7 and 8 MHz. OFDM Params => Guard Interval Allows to select guard interval between 1/4, 1/8, 1/16 and 1/32. OFDM Params => Code Rate Allows to select code rate between 1/2, 2/3, 3/4, 5/6 and 7/8. OFDM Params => Cell ID Allows to enter Cell ID value 0..65535. OFDM Params => RF Allows to turn On / Off RF of modulator. OFDM Params => Saw filter Allows to turn On / Off saw filter of intermedium frequency. Parameter can be actual if analog TV channel is adjacent to OFDM channel. OFDM Params => Out. Frequency Allows to setup output frequency of modulator. OFDM Params => RF Offset Allows to setup RF offset of modulator. ±166 kHz for 8 MHz bandwidth, and ±125 kHz for 7 MHz channel. OFDM Params => Attenuator Allows to setup RF attenuation in a range of 0..15.5 dB. Network Params => Stream ID Stream ID value. Requires to execute "Save & Run" command from "Input Stream" menu. Network Params => Network ID Network ID value. Requires to execute "Save & Run" command from "Input Stream" menu. System Status => List of Errors Shows all errors of the systems. Use "Up" and "Down" buttons to review all of them. System status => Input status Shows input bitrate and C/N. It also shows RF level if tuner is unlocked. System status => Output status Shows output bitrate and the usage of available bandwidth. System Info => Product Shows the name of the device. System Info => Serial Number Shows serial number of the device. System Info => Soft. Version Shows software version of the device. System Info => System time Shows system time of the device. NOTE: timing zone and date/time source must be setup correctly. These settings available only with PC control software. System Info => Temperature Shows internal temperature °C of the device. 7 NOTE: This descriptor for current modulator (current transport stream) is generated automatically according to modulation parameters. User must take care only about the rest transport stream descriptions. Spaces between hex values can be added, but it is not necessary. Press "Save and RUN" when all NIT modifications are done. Logical Channel Descriptors can be added into the 1st section of NIT, which represents services of current stream only. "Selected channels" table has a list of all currently enabled services. If "Log. channel" field is other than zero, a LCD (Logical Channel Descriptor) will be added for that channel. LOGs section Device has internal clock, and a value 1970.01.01 00:00:00 will be assigned after system startup. The clock will be updated automatically from transport stream TDT table (if enabled at "OFDM Output" tab). Information in this page is updated automatically in real time. Figure 9. LOGs section of tcx311 All errors or most important events will be logged in this section. "Erase log" button allows to clear all logs. 20 records per page can be displayed. Page selector will appear on the screen if more than 20 records are in the system. This page will be refreshed automatically when a new event occurs in the system. "Download log" link allows to download all log records from the system as a text file. NOTE: This feature works with Terra Link starting from 1.6.0 version or CMH Master starting from 1.0.3.0. 7. Handheld control unit Handheld unit allows to control the most important parameters of the device. Select the tcx311 device (see user manual of handheld unit). "Control" menu item will appear. Menu tree will appear on the screen. The first character ">" marks currently selected menu item. Some menu items has "^" character in the second position of the line. It means that current menu item is checked. Use "Up" and "Down" buttons to surf through the menu. Use "Enter" key to enter into deeper submenu or execute the command associated with it. "Esc" key will exit to upper menu or cancel the execution of a command. tcx311 has the following menu tree: Input streams Rescan... Figure 3. "DVB-C input" stream section of tcx311 control panel DVB-C input section (see figure 3) allows to setup RF reception parameters, displays status of demodulator. "Modulation" - the modulation of input signal. "Input Frequency" - the frequency of RF input signal, kHz. "Symbol rate" - the symbol rate of input signal. "DVB-C receiver status" shows the status of demodulator. Device measures signal level, VBER (BER after Viterbi), PER (Packet Error Ratio), carrier/noise ratio, and shows other information of transponder (modulation standard, FEC, frequency). Device recognizes any packet lost in demodulator, and calculates the ratio between valid and invalid packets. If PER value has a sign "<", it means, that no any packet has been lost in demodulator section. In case of error, a sign "<" will disappear and an error record will appear in Logs section. Parameters of demodulator in this page are updated in real time. Input stream section List of services SAVE & RUN Input params Input freq. Symbol rate Modulation OFDM params Modulation Bandwidth Network params System status Cell ID RF RF offset Code rate Saw filter Attenuator Stream ID - High definition television; Network ID - Standard definition television; - Radio Unidentified service types will not have any icon (like "Pace TDS 865" in Figure 4). NOTE: Lock sign only identifies a flag of SDT table and does not check the content itself. Check "Enable" checkbox and press "Enable services" to pass that service to modulator. After few seconds a service will be activated and passed to modulator. NOTE: Press "Home" tab to see used bandwidth of selected services. Ensure that it takes not more than 90-95% of available bandwidth and no any bit rate overflow errors are there. Press sign if you want to see or change more details about the service. New area with information about the service will be expanded. See Figure 5. List of errors Output status 6 Figure 4. DVB-C input section of tcx311 control panel This is a transport stream multiplexer section of device. Valid transport stream must exists (DVB-C demodulator must be locked) to start working with this section. "Load streams" button will load information of the stream. All found services will be listed below the button. Lock symbol at the beginning of service name indicates that a service is scrambled. Next icon represents the type of service. Following icons are possible: Guard interval Input status System info Out.frequency Product Serial number System time Soft. version Temperature 3 "OFDM Output" section Figure 5. Service details List of all streams and other parameters will appear. Some streams will have icons, which indicates the type of the stream. Following icons are possible: - Sound stream; - DVB Subtitles; - Teletext; - Video; Language code will be visible in round brackets if presented in the stream. Lock sign identifiers conditional access streams, which affects a stream or a whole service (like in example above). Most of streams of the service can be disabled (filtered) by unchecking "Enabled" check box. A service name and service provider name can be changed there. "Monitoring" check box turns on monitoring of PMT version changes. If it is checked, new PMT table will be reloaded if the version of the table is changed. New appeared streams will be added to the service automatically. Disappeared streams will be removed from the service as well. The device does not take into account possible bit rate overflow of new multiplex. User must take care about it. Use this feature only in case if it is necessary. If unsure, leave it unchecked. "Scrambled" flag can be switched on/off. If the flag is off, SDT table will be generated without "scrambled" flag and all CA descriptors will be removed from the service. Press "Update program information" button to modify details the service. NOTE: "Enable services" button will require to press to save all changes and to take them affect. OFDM Params section Figure 6. OFDM parameters of tcx311 control panel There are two tables in this section - modulator parameters and RF parameters. Modulator parameters: Modulation - modulation type. Possible values: QPSK, QAM16, QAM64 Bandwidth - 7 or 8 MHz. Guard interval - 1/4, 1/8, 1/16, 1/32 Code rate - 1/2, 2/3, 3/4, 5/6, 7/8 Cell ID: - any value 0..65535 can be entered. Mode: - 2k only RF parameters: RF On/Off - Allows to switch RF On or Off at the output Saw filter - Enable or disable 8 MHz (or 7 MHz) bandwidth saw filter's at intermediate (36 MHz) frequency. If the frequency offset ±166/125 kHz is used, a filter will be switched off automatically. RF Frequency - Output frequency of modulated COFDM signal. Step - 0.5 MHz. RF Offset - Output frequency offset ±166 kHz, or ±125 kHz in 7 MHz bandwidth case. Attenuator - RF Output attenuation in 0.0 .. 15.5 dB range. NOTE: terrestrial_delivery_system_descriptor in NIT will be changed automatically after a change of any modulation 4 parameters. Open "OFDM Output" tab and press "Save & Run" to save new values of descriptor. Figure 7. OFDM output parameters of tcx311 Output stream parameters can be configured in this section. The most important parameters are Stream ID and Network ID. User must ensure that Network ID number is identical in all broadcasting equipments and Transport stream ID must be unique for every modulator or other streaming equipment. “Private Data Specifier” field optionally can be used to identify the broadcaster or country. It should be assigned according to EN 101 162 specification. All allocated values can be find here: http://www.dvbservices.com/identifiers/private_data_spec_id. Hexadecimal value should be entered here. The descriptor will be used together with LCN descriptor. If unsure - enter zero. In that case the Private_Data_Specifier will not be used at all. "Network Name" used in NIT (Network Identification Table) and it represents broadcaster. "Date/Time source" selects the source of the clock. TDT (Time and Date Table) will be passed to the output from selected source. Also a system clock will capture current time values from this source. "Timing zone" selection used for system clock only and does not affect the output stream. TOT (Time Offset Table) is passed transparently to the output from selected source, which carry timing zone information to the end-user. "NIT Enable" parameter allows to turn On/Off NIT generation. "EPG Multiplexing" parameter allows to turn On/Off multiplexing of EPG (Electronic Program Guide). The system will multiplex EPG (EIT) if this parameter is turned on. EPG multiplexing part takes original EIT (Event Information Table), modifies StreamID, NetworkID values and sends the stream to the output of multiplexer. EIT will be passed (multiplexed) for enabled services only. New button "Save and RUN" will appear if any value of this section was changed. Press it to save all changes and run the system with modified values. Next important part of this section is NIT configuration. Broadcaster can describe whole network there, so receivers (TV, set-top-boxes) will be able to scan all channels automatically. The most important note to remember - Network ID number must be identical in all broadcasting equipments and Transport stream ID must be unique for every modulator or other streaming equipment. Enter NetworkID and StreamID values in "New Stream Description" table to start describing a stream (the output of each modulator in the system). New empty record for that stream will appear above that table. Press sign to expand a description and add all necessary descriptors for that stream. Select a descriptor (probably only "terrestrial_delivery_system_descriptor" will need) from the list and press "Create new descriptor" button. New empty descriptor will be added. Press onto again to expand stream description. New inserted descriptor will be found. Press onto to edit it's values. See Figure 8. Figure 8. Terrestrial descriptor Exact broadcasting parameters must be written for selected stream. All streams (modulators) must be described here. And all other modulators must have the same description table. NOTE: Only terrestrial system descriptor has user-friendly editor. All the reset descriptors can be added in hex format only. Values must be added according to EN 300 468 standard, starting after descriptor_length field. descriptor_tag and descriptor_length will be added/calculated automatically. 5