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CONTROL MODULE.

DT-802

04-2015

Page 35

MER

:

It is the Modulation Error Rate. It is a measure that allows knowing
how good a modulated digital signal is. It is the equivalent of the
information provided by the signal/noise rate in the analog
modulations.

DL-FREQUENCY

: It is the downlink frequency from a satellite to the Earth. It is

equivalent to adding local oscillator frequency plus intermediate
frequency of a signal.

SYMBOL RATE

: In digital communications, symbol rate, also known as baud or

modulation rate; is the number of symbol changes (signalling
events) made to the transmission medium per second using a
digitally modulated signal or a line code. The Symbol rate is
measured in baud (Bd) or symbols/second. In the case of a line
code, the symbol rate is the pulse rate in pulses/second. Each
symbol can represent or convey one or several bit of data. The
symbol rate is related to but should not be confused with gross
bitrate expressed in bit/s. A symbol is a state or significant condition
of a channel of communication that persists for a period of time.
The transmiter instrument puts the symbols in the channel at a
known rate of symbols, and the receiving device has to identify the
sequence of symbols in order to rebuild the data transmitted.

NID

:

LCN

:

It a number that identifies the Logical channel number.

PID

:

It is the Packet IDentification, a number that identifies a service of a
program.

CAM

:

A conditional access module (CAM) is an electronic device, usually
incorporating a slot for a smart card, which equips an Integrated
Digital Television or set-top box with the appropriate hardware
facility. This enables you to view conditional access content that
has been encrypted using a conditional access system. There is not
an unique CAM that allows working with all the existing formats
encrypted, it depends on the system of encrypted digital platform
you are using.

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Содержание DT-802

Страница 1: ...DT 802 CONTROL MODULE DIGITAL TV HEADEND 0 MI1786 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com ...

Страница 2: ... mainly SAFETY RULES paragraph The symbol on the equipment means SEE USER S MANUAL In this manual may also appear as a Caution or Warning symbol Warning and Caution statements may appear in this manual to avoid injury hazard or damage to this product or other property ...

Страница 3: ...r installation 12 4 INSTRUCTIONS FOR USE 13 4 1 Description of the Controls and Elements 13 4 2 Arrows and Function Keys Description 14 4 3 LEDs Table 15 4 4 DT 802 Starting Up 15 4 5 Main Screen 16 4 6 PASSWORD 18 4 7 CONFIGURATION 19 4 7 1 Description of the initial setup screen 19 4 7 2 Browsing the SETUP menu 20 4 7 3 Entering Editing and Selecting values 21 4 7 4 DT 802 Configuration 22 4 8 2...

Страница 4: ...CONTROL MODULE DT 802 ...

Страница 5: ...odule of the DTTV system The control module is connected to all the modules of the headend via modem cable The DT 802 allows controlling and configurating each module individually The user can manage and check the status of any module in two different ways in local mode or in remote mode In local mode the module is managed via the keypad and the LCD screen placed on the frontal of the DT 802 In re...

Страница 6: ...ial port MODULES CONFIGURATION Local Through local interface Remote Through Ethernet port PC software supplied POWER SUPPLY Network voltage 90 250 V AC Network frequency 50 60 Hz Consumption 6 A 3 A maximum for a range lower higher at the input voltage Output Connector JST B08P XL HDS Amount 4 Output voltage 12 V 14 A max 5 V 20 A max OPERATING ENVIRONMENTAL CONDITIONS Altitude Up to 2000 m Temper...

Страница 7: ...le Alim 350 mm 4 mod DT 802 1 x CC144 Cable Alim 470 mm 4 mod DT 802 1 x 0 MI1786 User s Manual DT 802 SPARE PARTS AL 802 1 x Spare Power Supply each control unit DT 802 integrates two sources AL 802 RECOMMENDATIONS ABOUT THE PACKING It is recommended to keep all the packing material in order to return the equipment if necessary to the Technical Service ...

Страница 8: ...CONTROL MODULE DT 802 Page 4 04 2015 ...

Страница 9: ...e following accessories use only the specified ones to ensure safety Power cord Observe all specified ratings of supply Remember that voltages higher than 70 V DC or 33 V AC rms are dangerous Use this instrument under the specified environmental conditions The user is not allowed to perform changes inside the equipment Any change on the equipment must be done exclusively by specialized staff When ...

Страница 10: ...ith safety 2 2 Descriptive Examples of Over Voltage Categories Cat I Low voltage installations isolated from the mains Cat II Portable domestic installations Cat III Fixed domestic installations Cat IV Industrial installations Page 6 04 2015 ...

Страница 11: ...alling it in a 19 rack cabinet Fig 2 or anchoring it on a wall The wall anchoring system allows through a tilting system accessing the rear of the subrack where the connectors are placed Fig 3 One subrack can contain approximately 8 modules One of them must be the control module DT 802 The sub rack DT 900 is supplied with an user s manual which describes in detail the steps to complete the assembl...

Страница 12: ...CONTROL MODULE DT 802 Figure 2 Assembling a DT 900 in a Rack Cabinet Figure 3 Tilting System Page 8 04 2015 ...

Страница 13: ...ub rack Place the DT 700 and or DT 710 at the right end of the sub rack Place the DT 101 102 and the DT 301 302 side by side in the case they were paired Place the rest of the modules together without leaving a gap between them Figure 4 Installation of the modules into the sub rack Following these advises you will achieve a tidy installation and the best configuration for later maintenance or new ...

Страница 14: ...onnection between them Each module is supplied with interconnecting cables which are needed to carry out any possible combination between modules Figure 5 Application example DTTV The wiring must be done when the DT 802 module is off You do not have to turn it on until ALL connecting work is done on one hand control cables between the CPU and the modules and on the other hand TS cables between mod...

Страница 15: ... from starting up when it is not connected to any module Therefore the control module will not be ON if at least one connection is made previously The combiner modules DT 700 and DT 710 are supplied with some resistors to balance the inputs outputs not used and unbalanced You should also bear in mind that the module DT 802 does not control these two modules The DT 700 is also a passive module comb...

Страница 16: ... are receiving input signals properly satellite TV analogue etc 5 Check that all modules are wired properly especially the power cord from the control module to the modules and the wiring between them 6 Start up the system using the switches placed at the rear of your control module 7 Wait for a few seconds until the control module finishes sweeping and detects all the modules After that all them ...

Страница 17: ...ts The only element of control is the DT 802 module The rest of modules refer to their status by LEDs place on the front of the module Frontal Panel Figure 7 Panel frontal DT 802 1 Display 2 Control Keys 3 Escape Key 4 PSU Power Supply Unit status 5 Ethernet RJ 45 Connector 6 Buzz Pulsar para apagar el zumbador ...

Страница 18: ...ntrol Output 4 2 Arrows and Function Keys Description Figure 8 Function Keys Enter the menu Validate Select Deselect Go to the upper level menu Increase a number Go to a lower level menu Decrease a number Go to the menu on the right Go to the number on the right Go to the menu on the left Go to the number on the left Exit without validating Page 14 04 2015 ...

Страница 19: ...s not able to read the service list GREEN Proper TS output TS OUT RED Problems at the TS output GREEN Audio and video processing is working properly A V RED Error during the process Encoder broke down GREEN Proper Multiplexing MUX RED Error during multiplexig Multiplexer broke down Table 2 Table of LEDs description 4 4 DT 802 Starting Up Turn on your equipment through the switch which is placed on...

Страница 20: ...uential order to show all the elements The modules are identified as follows DT XXX SY MZ Where XXX Indicates the name of the module SY S means SLOT and Y is a number equal to the slot position in the subrack case This position is the one the module assigns automatically every time you turn it on If it does not correspond to the actual position can be changed manually but it does not affect the op...

Страница 21: ...t will appear the name of the module in the STATUS line and in the line below a brief description of the problem Fig 10 Figure 10 Errors in the Main Screen If there are more than one module working wrong the names of these module will appear sequentially at the bottom of the screen Next to the name is shown a number indicating the order of the module for total modules with errors If any of the mod...

Страница 22: ...r the password follow the steps below to EDIT a NUMERIC value You can apply these steps in order to edit any numeric value 1 Press ENTER to get into the PASSWORD option 2 Press RIGHT or LEFT to move among the numbers from units to thousands 3 If you want to change a number press UP to increase or DOWN to decrease 4 Once the value is edited press ENTER to confirm the entered value After entering th...

Страница 23: ...ected option over the total amount of menu options At the central area of the screen it appears the name of the module Fig 12 on the figure is the DT 802 control unit Note that the system counts the double modules like two different units and the configurations of them are independent At the bottom area the first line shows the message LINK TO and then the name of a module This message indicates t...

Страница 24: ...n see what modules are available 2 When you have the module you want to configure on the screen press ENTER 3 Once inside the setup menu press the Arrow keys LEFT or RIGHT to move through the module setup options 4 When the menu option you want to access is displayed press ENTER or DOWN 5 An arrow on the left side of the selected option means that you are into the menu Fig 13 Now you can change th...

Страница 25: ...ubmenu press UP or ESCAPE Numeric Field Editing In case you have to EDIT the numeric value follow these steps 1 Press ENTER to enter the menu item 2 Use LEFT or RIGHT to move among the numbers 3 To change the value of a number press UP DOWN 4 Once the value is edited press ENTER to confirm the value Editing text field In case you have to EDIT the text follow these steps 1 Press ENTER to enter the ...

Страница 26: ... the value will not be accepted For the changes were applied you must SAVE previously the settings There are o different ways to save the settings made using the SAVE option on each module n the other hand you can save the settings of all modules at once using the SAVE 7 4DT 802 Configuration and power module and therefore is the most important odule of the DTTV The DT 802 controls the DTTV headen...

Страница 27: ...irst line at the bottom of the screen shows the modules linked to it The second line shows the total amount of modules that the control module has detected itself excluded 4 7 4 1 Menu Tree The diagram attached shows how to access the DT 802 menu setup and the options available on it ...

Страница 28: ...CONTROL MODULE DT 802 Figure 15 Menu tree DT 802 Page 24 04 2015 ...

Страница 29: ...he modules in the rack this option allows you to change this assigment manually 1 Press ENTER to get into the menu With RIGHT and LEFT arrows you can see the correspondence between the current location assigned second line and the modules third line Figure 16 Manual assignment 2 Press ENTER again The second line is selected it shows an arrow next to it and you can move the third one which is the n...

Страница 30: ...sign a name to the distribution network It is a text field LCN Config Logical Channel Number Configuration It allows you to change the logical channel number This is the number from which programmes are stored in the TV receiver It is a numeric field Private Data Specifier Ethernet Config It allows you to modify the parameters of connection to the data network It contains a sub menu with some opti...

Страница 31: ...PkUpdate to transfer the update file from your computer to the DTTV microprocessor Steps to follow 1 Install the software PkUpdate on your computer Double click on the executable located in the folder PkUpdate which is in the CD supplied with the unit DT 802 2 Once installed run the program from the icon PkUpdate lnk PkUpdate that has been created on the desktop Previously make sure the computer i...

Страница 32: ... update all units of the same type in the head end that is if the firmware affects units DT 30X and there are more than one in the head end they all will be updated 9 When the progress bar reaches 100 it pops up a window with the message box Update process successful 10 Once the process is finished quit the program and restart the module DT 802 For more details please read the manual that is suppl...

Страница 33: ...ould be clear to you the purpose of your installation and the existing telecommunications infrastructure in your establishment In this specific case Analogue TV Distribution network via coaxial cable DTT receivers with built in tuner Satellite dish Terrestrial antenna receiving digital and analogue signal 2 TV Services to distribute You should decide what channels and services you want to distribu...

Страница 34: ...tion to a diagram block Figure 18 And the electrical connections scheme Figure 19 5 Search data for the tuning of the channels and services The tuning data for the channel where are the Italian services Canale 50 and TV7 Lombardia are Page 30 04 2015 ...

Страница 35: ...Local Oscillator According to the data collected it is a vertical polarization Therefore is 9750 MHz DL Frequency 11 541 DL Band For the European area is Ku band LNB For vertical polarization 13V Standard It is a normal digital channel therefore DVB S Symbol Rate 22000 Service List Select the services Channel 50 and TV7 Lombardia Although it has capacity for many more Receiver 2 LNB Local Oscillat...

Страница 36: ...ant signal to the TV distribution network and tune all the TV sets with the new services Figure 20 After a few months Mr Ferrer is very pleased German and Italian clients appreciate having channels in their own language at the hotel and they feel more comfortable The number of bookings has been increased In addition few days ago french customers started to call asking for information references an...

Страница 37: ...odulator which is designed specifically for the symbol set used by the modulator determines the phase of the received signal and maps it back to the symbol it represents thus recovering the original data This requires the receiver to be able to compare the phase of the received signal to a reference signal such a system is termed coherent and referred to as CPSK Depending on the number of possible...

Страница 38: ...ng MPEG2 format The structure allows mixing in a stream a large number of video services audio and data For transmissions via satellite the QPSK encoding is adopted with a binary variable flow from 18 4 to 48 4 Mbits s DVB S format is widely used in European countries TS ASI Transport Stream Asynchronous Serial Interface It is a protocol especially designed for transmitting in media sensitive to n...

Страница 39: ...several bit of data The symbol rate is related to but should not be confused with gross bitrate expressed in bit s A symbol is a state or significant condition of a channel of communication that persists for a period of time The transmiter instrument puts the symbols in the channel at a known rate of symbols and the receiving device has to identify the sequence of symbols in order to rebuild the d...

Страница 40: ...r memory cards all the way to scientific instrumentation and industrial robotics Also more complex consumer devices such as mobile phones digital cameras synthesisers etc contain firmware to enable the device s basic operation as well as implementing higher level functions TID The information in accordance with the MPEG format is divided into several packets that are transmitted Each of these pack...

Страница 41: ...may attack the plastics used in the construction of the cover The cover should be cleaned by means of a light solution of detergent and water applied with a soft cloth Dry thoroughly before using the system again CAUTION Do not use for the cleaning of the front panel and particularly the viewfinders alcohol or its derivatives these products can attack the mechanical properties of the materials and...

Страница 42: ...PROMAX ELECTRONICA S L ...

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