SBD75e Series Demodulator L-Band Satellite Demodulator 32 k – 45 M Symbol BPSK/QPSK/OQPSK/8PSK/16QAM/32APSK Installation and Operation Manual Version 1.0 November 2008 Copyright © 2008 AdvantechAMT. All rights reserved.
Preliminary Pages Preface Thank you for purchasing a Demodulator from Advantech AMT. These products build on the success of the SL/QD series, the industry’s first L-band digital satellite modems. Advantech Advanced Microwave Technology is an international company specializing in the development of satellite communication systems.
Preliminary Pages Copyright Notice Copyright © 2004-2008 AdvantechAMT. All rights reserved. This manual may not be reproduced or disclosed in whole or in part by any means without the written consent of AdvantechAMT, Inc.
Preliminary Pages Warranty and Service Advantech AMT warrants to the Purchaser that the Products and any Repaired Products (Repairs) will be free from defects in material and workmanship for a period of two years from the date of shipment to the Purchaser. Advantech AMT’s obligation under this warranty is limited to replacing or repairing, at ADVANTECH AMT’s option, Products or Repairs found by Advantech AMT to be defective within the warranty period.
Preliminary Pages Safety Notices Radio Frequency (RF) Interference This equipment generates, uses and can radiate radio frequency energy, and, if not installed in accordance with the instructions contained herein, may cause interference to radio communications.
Preliminary Pages Contents Chapter 1 Getting Started Describes the function of the equipment and its purpose within the system. It also provides a guided tour of the base unit front and rear panel controls, indicators and connectors. Chapter 2 Installation Details the procedures for installing the equipment, including important safety information, details the base unit connectors and cables. Chapter 3 Front Panel Monitoring & Control Describes how to configure the unit using the front panel display.
CHAPTER 1: Getting Started List of Contents List of Figures 1.1 1.1.1 1.1.2 1.1.3 1.1.4 1.1.4.1 Scope of this Manual ............................................... 1-2 Who Should Use This Manual ................................... 1-2 Version Information ................................................... 1-2 Equipment Covered by this Manual ...................... 1-2 RF Interface Options ................................................. 1-2 L Band Input (950-2150 MHz) ................................
Getting Started 1.1 Scope of this Manual 1.1.1 Who Should Use This Manual This manual is intended for operators/users of the SBD75e series of Network L-Band Satellite Demodulators to assist in the installation, operation, fault-finding and maintenance of the equipment. Throughout this manual, this product is referred to as the ‘SBD75e Demodulator ’. WARNING DO NOT REMOVE THE COVERS OF THIS EQUIPMENT. HAZARDOUS VOLTAGES ARE PRESENT WITHIN THIS EQUIPMENT AND MAY BE EXPOSED IF THE COVERS ARE REMOVED.
Getting Started Caution With LNB power enabled, there is a potentially damaging dc voltage applied to the Demodulator input. When connecting test equipment, or a local modulator (or any dc coupled devices), always use appropriate dc blocks, and disable LNB powering. The following commands are available to provide dc, tone or reference to the LNB/BDC: 1.2 Summary of Features 1.2.
Getting Started RS232 M&C Connector VFD LED Indicators Keypad Figure 1.2: SBD75e Demodulator Front Panel 1.3.2.1 Vacuum Fluorescent Display (VFD) The VFD can display two lines of up to 40 characters each and has a wide viewing angle. 1.3.2.2 LED Indicators The LEDs on the front panel indicate the summary status of major Demodulator conditions. LEDs that illuminate GREEN indicate that the function is in operation. LEDs that illuminate RED indicate a fault condition. Figure 1.
Getting Started 1.3.2.3 Keypad The front panel 16-button keypad allows for navigation of the VFD and data input. Figure 1.4: Front Panel Keypad Table 1.2: Front Panel Keypad Functions Keys Function ENTER This key will enter a submenu or enter an editing mode of a parameter. The Parameter is only set once ENTER is pressed again otherwise changes will not be saved. Commands such as reconfigure and reset will activate once the ENTER key is pressed.
Getting Started 1.3.3 Rear Panel The SBD75e Demodulator rear panel provides a number of connectors. Further details, including pin-outs are described in Chapter 2, Installation. AC Power Connector ON/OFF Switch RF INPUT CHANNEL 1/2 Connectors RS232 Connector ASI 1/2/3/4 Connectors ALARM Connector M&C DEMOD Connector Figure 1.
Getting Started 1.4 Typical System Setup The following diagram shows a typical system setup and signal interconnections. For detailed connector information, see Chapter 2, Installation. Figure 1.
Getting Started 1-8 SBD75e Series Demodulator Installation and Operation Manual
CHAPTER 2: Installation List of Contents 2.1 2.1.1 2.1.2 2.1.2.1 2.1.2.2 2.1.3 2.1.3.1 2.1.3.2 Introduction ............................................................... 2-2 Read This First! ............................................................ 2-2 Site Requirements ..................................................... 2-2 Power Supplies .......................................................... 2-2 Environment ...............................................................
Installation 2.1 Introduction This chapter describes the unpacking, inspection and installation considerations. Advantech AMT personnel normally perform installation of the SBD75e Demodulator. This chapter provides configuration and connection information for planning installations, checking the final set-up in the event of a fault, modifying the requirements or moving the equipment to another location. In the event of problems, contact Customer Support. 2.1.
Installation 2.2 Preliminary Checks 2.2.1 Mechanical Inspection When taking delivery of an SBD75e Demodulator, check the equipment items delivered against the enclosed delivery note. Inspect the equipment for damage in transit. If in doubt, contact Customer Support (see Preliminary Pages). NOTE… Do not remove the covers of this equipment as doing so may invalidate any warranties, cause a safety hazard and/or affect the EMC performance. It may also invalidate any safety tests.
Installation 2.3.2 Inventory Take inventory of the complete package to ensure that all necessary parts are present. A quick review of your pre-installation site survey form, purchase order, and shipping list should reveal any discrepancies. The box should contain the modem, a power cord, a fan filter kit, and this manual. If any additional kits have been ordered such as the Rear Support Kit verify the contents using the packing slip. 2.
Installation Figure 2.1: Rack Mount Support Kit The left and right mounting kit supports are attached to the SBD75e Demodulator with two #6-32 x 5/16” Phillips countersunk screws. Each angle is attached to a support by one #8-32 x ½” screw, one #8 lock washer, one#8 flat washer 3/8” OD, one #8 flat washer ½” OD and one #8-32 hexagonal nut. Do not use this product as a support for any other equipment. 2.4.
Installation 2. Do not install equipment so that the air intake of one aligns with the outlet on another. Provide baffles and adequate spacing. 3. The fans contained within this unit are not fitted with a dust/insect filter. Pay particular attention to the environment in which it is to be used. The unit is designed for stationary or fixed use only. Ensure it is firmly and safely located and has an adequate through-flow of air. Allow at least 50 mm free air-space at each side of the equipment.
Installation 2.5.2 AC Power and Fuse AC power is supplied to the Demodulator via socket JP1 (IEC 320(M) on the rear panel. WARNING UNDER NO CIRCUMSTANCES SHOULD THE EARTHING PIN OF A 3-PIN PLUG BE REMOVED TO OPERATE WITH A 2-PIN SOCKET. Caution The SBD75e Demodulator series are shipped with a North American standard 3-pin power cable that is designed to work with 100-120V power supplies only.
Installation UK (BS 1363) EUROPE (CEE 7/7) USA (NEMA 5-15P) Earth: Green-and-yellow Green-and-yellow Green Neutral: Blue Blue White Live: Brown Brown Black If the colours do not correspond with the coloured markings identifying the terminals in a locally supplied plug, proceed as in Table 2.3 (included for reference). Table 2.3: Non Standard Supply Cord Wire Colours 2.5.2.
Installation 2.6 Signal Connections The majority of signal connectors are located on the rear panel of the SBD75e Demodulator, except for one monitor and control connector located on the front panel. Note Always use the specified cables supplied for signal integrity and compliance with EMC requirements (see appendix A, Technical Specification). 2.6.1 M&C Connector - RS232 An RS-232 connector, provided at the rear panel, supports the connection of ANSII 3.
Installation 2.6.3 Item Specification 6 RX - Green 7 White W/Brown 8 Brown 2 Alarms Connector An RS-232 15-pin connector, provided at the rear panel, enables Form C relay outputs of the Demodulator status. Table 2.
Installation Table 2.8: ASI Output Connector Item Specification Connector type: BNC 75 Ω socket Connector designation: ASI OUT 1 ASI OUT 2 ASI OUT 3 ASI OUT 4 Pin-outs: Centre Video Signal Shield Ground/Chassis 2.7 Configuring the Demodulator for Best Performance 2.7.1 Demodulator Acquisition Tips This section is a useful checklist for debugging the Demodulator acquisition process, with some tips for getting the best performance. To debug the Demodulator acquisition process: 1.
Installation 2.7.2 BER Measurement Note The SBD-75e provides two means of analyzing link error rate performance. When the Demodulator is operating in PRBS Mode the front panel menu shows the real Bit Error Rate measured from errors detected on the PRBS sequence. The BER can be reset by via the front panel. Note The displayed Bit Error Rate value is invalid when the Demodulator is receiving real data traffic.
CHAPTER 3: Front Panel Monitoring & Control List of Contents 3.1 Introduction ............................................................... 3-2 3.2 Powering up the Demodulator ............................... 3-3 3.3 3.3.1 3.3.2 3.3.2.1 3.3.2.1.1 3.3.2.2 3.3.2.2.1 3.3.2.2.2 3.3.2.2.3 Basic Front Panel Operation ................................... 3-3 Overview .................................................................... 3-3 Select Board ........................................................
Front Panel Monitoring & Control 3.1 Introduction The SBD75e Demodulator is equipped with an active front panel (LCD screen and keypad) which provides an easy way to setup the Demodulator without the need for a PC or generic control system. This chapter is intended to allow maintenance personnel or users to quickly set up the Demodulator for initial use. Switch On Advantech AMTTM Overview : Press any key to continue..... Overview : (para. 5.3.1) Select Board > (para. 5.3.2) Chassis Info > (para. 5.3.
Front Panel Monitoring & Control 3.2 Powering up the Demodulator When power is applied to the Demodulator (in accordance with the instructions given in Chapter 2, Installation), approximately 90 seconds should be allowed for the system to boot-up, complete internal checks, for the internal crystal oven to reach operating temperature and the frequency of the crystal to stabilize. The following screen is then displayed: Advantech AMTTM Press any key to continue..... 3.
Front Panel Monitoring & Control Table 3.2: Select Board Menu 3.3.2.1 Menu Item Operations Status > Lists the status of the input and configuration. All parameters in this menu are read only. Configure > Allows configuration of various parameters within the unit. System Setup > Allows configuration of card Ethernet address. Status The Status parameters may be viewed by selecting the Status option from the Select Board menu. The read-only parameters displayed are detailed in Table 3.3. Table 3.
Front Panel Monitoring & Control 3.3.2.2 Menu Item Operations Coding: This will report locked or unlocked. ALL: This will report locked or unlocked. Configure All options selected within this menu are pending settings and will not take effect until the unit is reconfigured. The settings are only saved when the unit is reconfigured and will be lost if the user exits out of the configure menu or the unit is power cycled.
Front Panel Monitoring & Control Menu Item Operations Create Profile > This submenu will allow a name to be created and the configuration to be stored to non-volatile memory on the card. Delete Profile > This submenu is only displayed if profiles have been stored. It will allow unwanted profiles to be deleted. A profile should first be loaded then it can be deleted from the memory on the card. 2. Select the Load Profile option. The following screen is displayed.
Front Panel Monitoring & Control To delete a profile: 1. Select the Delete option from the Profiles sub-menu. The following screen is displayed. Deleting Profile: MUX_B ENTER = Confirm : CLEAR = Cancel 3.3.2.2.2 Inputs To select inputs and control the LNB, the Inputs option should be selected from the Configure sub-menu. The options available are detailed in Table 3.7. Table 3.7: Inputs Sub-menu 3.3.2.2.3 Menu Item Operations Input: For selection of L-Band input. The choice is input 1 or input 2.
Front Panel Monitoring & Control Note When selecting a code rate, note that only legal values are selectable. ACM is a special case for DVBS2. Table 3.9: Coding Options Menu Item Modulation : Operations This option does not appear if ACM has been selected. Only the possible combinations for the chosen code type and rate will appear. This may also be limited by the feature keys installed. The possible range is BPSK, QPSK, 8PSK, 16QAM, 16APSK and 32APSK.
Front Panel Monitoring & Control Menu Item Operations Output X ISI: This option is only selectable if DVB-S2 ACM is selected. Only select streams with the correct ISI value. The range is 0 to 255. Output X Mode: This option is only selectable if DVB-S2 is selected. If Normal is selected then just data is output, if TFrame is selected then whole Baseband frames are output. This is used if post-processing is required. Reconfigure: This button will activate all the pending options described above.
Front Panel Monitoring & Control 3-10 SBD75e Series Demodulator Installation and Operation Manual
CHAPTER 4: Web List of Contents 4.1 Introduction ............................................................... 4-3 4.2 4.2.1 Requirements for Accessing the GUI ..................... 4-3 Accessing the GUI .................................................... 4-3 4.3 4.3.1 4.3.2 4.3.3 Overview .................................................................... 4-4 Overview: Information.............................................. 4-4 Overview: Alarms ..................................................
Web GUI Monitoring & Control 4.8.10 4.8.11 BISS Insertion Period ................................................ 4-26 Encrypted Session Word Generator ..................... 4-27 4.9 4.9.1 4.9.2 4.9.2.1 4.9.2.2 4.9.2.3 4.9.2.3.1 4.9.2.4 4.9.3 4.9.3.1 4.9.3.2 4.9.3.3 4.9.4 4.9.4.1 4.9.4.2 4.9.4.3 4.9.4.4 4.9.5 4.9.5.1 4.9.5.2 4.9.5.3 4.9.5.3.1 4.9.5.3.2 4.9.5.4 4.9.5.5 4.9.5.6 SBD75e: Configuration ........................................... 4-27 Main .....................................................
Web GUI Monitoring & Control 4.1 Introduction This chapter is provided to guide the user through the functions of the Graphical User Interface (GUI). Following the information given for accessing the GUI, those web pages which deal specifically with chassis functions will be described. Subsequent sections focus specifically on the operation of the SBD75e in DVB-S2 modes. 4.
Web GUI Monitoring & Control 4.3 Overview 4.3.1 Overview: Information This section describes those web pages which are relevant to the unit chassis as a whole. These are used to view summary information, alarms and status for each installed functional unit. Unit information may be viewed by selecting the Overview tab from the entry level screen monitor bar. A window, similar to that shown in Figure 4.2, is displayed.
Web GUI Monitoring & Control Figure 4.3: Alarms and Warnings Monitoring Window In this window each of the properties listed may be monitored on two levels - alarm or warning. The thresholds of some of these properties are adjustable by the user. The Status column shows that the ‘Fan Fault’ alarm status is satisfactory i.e. warning monitoring is not being performed for this property, and that ‘Board Temp’ alarm and warning monitoring are also satisfactory.
Web GUI Monitoring & Control Figure 4.4: Changing Alarm Monitoring Window Additional information has now appeared in the ‘Status’ column, indicating that the ‘Fan too fast’ alarm is clear (shown by the green tick), and that the ‘Fan too fast’ warning has been asserted (shown by the yellow cross). The ‘Overview’ tab in the monitor bar on the left of the main panel now reflects this new warning state (shown by a yellow cross and a yellow fan symbol). 4.3.
Web GUI Monitoring & Control Figure 4.5: Status Window 4.4 SBD75e: Information The following web page menus are provided to enable the user to view and change the various properties of the SBD75e functional unit. 4.4.1 Information By selecting the SBD75e tab from the monitor bar on the left-hand side of the main panel, the user is able to set the name of the unit, check the software version and available optional features or capture a system snapshot.
Web GUI Monitoring & Control Figure 4.6: SBD75e Management Window 4.4.1.1 Setting the Unit Name The default name of the functional unit is SBD75e. The name of the unit may be changed by entering the desired name in the ‘Name’ box and selecting the ‘Update’ tab. The new name should appear in the monitor bar on the left-hand side of the main panel as shown in the example in Figure 4.7. Figure 4.7: Setting the Unit Name Window 4.4.1.2 Version The relevant software version number is shown in this window.
Web GUI Monitoring & Control 4.4.1.4 Supported Features A list of optional features supported by the unit is shown below the MAC address and are detailed in Table 4.1. Table 4.1: Optional Supported Features 4.5 Feature Operations Third ASI Output If the text ‘Third ASI Output’ is displayed, the SBD75e will support up to three distinct ASI output streams.
Web GUI Monitoring & Control Figure 4.8: SBD75e Status Window 4.6 SBD75e: Alarms From the ‘Alarms’ window the user may configure alarms and/or warnings based on the behaviour and status of the demodulator. Warnings are displayed to the user while alarms initiate the alarm relay. Alarms or warnings may be viewed by selecting the Alarms tab on the window shown above. A window, similar to that shown in Figure 4.9 is displayed.
Web GUI Monitoring & Control Figure 4.9: Alarms and Warnings Monitoring Window 4.6.1 General The following paragraphs detail the general alarms shown in Figure 4.9. 4.6.1.1 Lock State Allows an alarm or warning to be raised if the demodulator is unlocked. 4.6.1.2 LNB Over-Current Allows an alarm or warning to be raised if the LNB supply current exceeds the design limit. 4.6.1.
Web GUI Monitoring & Control 4.6.1.7 Dummy Frames Only Allows an alarm or warning to be raised if only dummy PL frames have been received in the preceding user specified interval. 4.6.2 Output Alarms There are a number of alarms which pertain to the functions of specific output interfaces. These alarms may be viewed by selecting the appropriate output tab. A window, similar to that shown in Figure 4.10 is displayed. Figure 4.10: Output Alarms Window 4.6.2.
Web GUI Monitoring & Control 4.6.2.4 Output N SESR Level This event allows an alarm or warning to be raised if the Severely Errored Second Rate (SESR) associated with the Nth output interface has exceeded the user specified threshold. The length of the time window over which the SESR is computed is the same as that used to compute ESR, and is programmable by the user (See Para 4.9.5.4).
Web GUI Monitoring & Control If any alarms are present, the green tick will be replaced by a red cross and the alarm relay will be activated. If any warnings are present, the green tick will be replaced by a cross, which will be yellow if no alarms are indicated. 4.7 SBD75e: Analyzer The analyzer may be started by selecting the ‘Analyzer’ tab on the main window. When the analyzer is started for the first time, a default window, similar to the one shown in Figure 4.
Web GUI Monitoring & Control 4.7.2 Analyzer Pane format To the right of the ‘Play’/’Pause’ symbol are two rows of icons. The top row of four icons enables the user to customise the format of the analyser pane. The pane can be split into two, three or four sub-panes, each of which can be used to display a different aspect of the demodulator performance. The bottom row of seven icons enables the user to choose the type of information to be displayed in each sub-pane.
Web GUI Monitoring & Control Figure 4.13: Spectrum Analyzer Window The spectrum displayed is that of the signal present at the input to the matched (root raised cosine) filter. This complex signal is sampled at twice the symbol rate of the demodulator, so the extent of the frequency axis is also twice the symbol rate of the demodulator. 4.7.3.1.1 Averaging ON/Off Button By default, the averaging function is turned on. This slows the response of the displayed spectrum to rapid input signal changes.
Web GUI Monitoring & Control Figure 4.14: Signal Constellation Window The image displayed above is that of the demodulated signal constellation. The displayed constellation is 16APSK, at 13.5 M baud. When the demodulator is receiving an ACM or VCM physical layer signal, the displayed constellation may be a composite of any of the modulation types present, i.e. QPSK, 8PSK, 16APSK, 32APSK or pilots symbols (from dummy PL frames). 4.7.3.2.
Web GUI Monitoring & Control Figure 4.15: Equalizer Frequency Domain Response Window 4.7.3.4 Physical Layer Statistics The physical layer statistics function may be selected by clicking on the fifth icon, in the row of seven. A window, similar to that displayed in Figure 4.16 is displayed with the selected icon highlighted in blue. Figure 4.
Web GUI Monitoring & Control The MODCOD histogram, shown in Figure 4.17, displays the statistical composition of the physical layer signal. In this example the display shows that the demodulator is detecting that approximately 49.9% of the symbols received are part of physical layer (PL) frames transmitted using 8PSK rate 3/4 (short FEC, with pilots). Less than 0.
Web GUI Monitoring & Control 4.7.3.5.3 User Packet Length (UPL) The length of the user packet, corresponding to a particular ISI, expressed in bits. If the UPL is 0, then the stream in question is not packetised. 4.7.3.5.4 Sync Byte The value of the packet sync byte, corresponding to a particular ISI. This is only valid for packetised streams. 4.7.3.5.5 MA Type The value of the first byte of the DVB-S2 base-band header, corresponding to a particular ISI.
Web GUI Monitoring & Control 4.7.3.5.9 Effects of Stream Isolation The SBD75e demodulator incorporates an optional ‘stream isolation’ function to mitigate against un-correctable transmission errors in some circumstances. If this function is engaged, then the base-band header statistics may not give a complete picture of the content of the physical layer, with respect to the streams contained within. 4.7.3.
Web GUI Monitoring & Control 4.7.3.6.4 Bit Rate The bit rate field indicates the estimated bit rate of the stream being processed. When the demodulator is configured for ACM/VCM, then the rate displayed is currently incorrect; the correct bit rate may be obtained by scaling the displayed rate by the ratio between the symbol rate and the maximum symbol rate (45 M baud). In this case, the scaling factor to be applied is 13.5/45.0, or 30%. 4.7.3.6.
Web GUI Monitoring & Control Figure 4.19: BISS Window 4.8.1 BISS Mode Selection The options for the BISS mode are Off, Mode-0, Mode-1, Mode-E, Odd/Even-1, Odd/Even-E, User1 and User-E. Depending upon the selection, the available options will change within this section of the window.
Web GUI Monitoring & Control Figure 4.20: BISS Mode Selection Window Note All session words, injected ID and Encrypted session words cannot be read back and are not echoed back to the display. These values are also not stored in the profiles but will be reused after a power cycle. To comply with the specification the keys cannot be changed more than ten times in a 5-minute period and that there is a minimum of 10 seconds between changes.
Web GUI Monitoring & Control 4.8.5 BISS-E The transport stream is decrypted by a calculated session word. This session word is generated from an injected ID and an Encrypted session word. This is fundamentally more secure as both the Injected ID and Encrypted session words are required for decryption and each receiver could have a unique Encrypted session word. The Injected ID is a 14 digit Hex value and the Encrypted Session Word (ESW) is a 16 digit hex value.
Web GUI Monitoring & Control 4.8.8 User-1 This enables a specific user mode where specific PIDs are decrypted. The SI information is not altered so this mode is not BISS compliant. The actual PIDs to be decrypted are specified only on the command line. A 12 digit hex value is required for the session word. The even key is the same key as used for BISS-1. This mode is used to guarantee that the decrypted transport stream will match the original. 4.8.
Web GUI Monitoring & Control 4.8.11 Encrypted Session Word Generator The Encrypted Session Word generator is an application which runs locally on the web browser and requires no network access. Consequently, the generated keys will have to be manually programmed into the unit via the front panel, GUI, SNMP or CLI. A 12 digit Hex value is entered in the Clear Session Word field and a 14 digit hex value is entered in the injected ID field. Clicking on the Generate ESW Key will produce a 16 digit hex value.
Web GUI Monitoring & Control LNB power supply options PL scrambling seed The Configuration window may be viewed by selecting the ‘Configuration’ tab on the main window. A window, similar to that shown in Figure 4.23 is displayed. Figure 4.23: Configuration Main Window 4.9.2 Stream Isolation Stream Isolation is an optional feature designed to improve the tolerance of the receiver to uncorrectable transmission errors, in certain circumstances.
Web GUI Monitoring & Control Figure 4.24: Stream Isolation Window 4.9.2.1 Automatic Mode The mode of operation my be changed to automatic by opening the ‘Behaviour’ pull-down menu and selecting ‘auto’. A window, similar to the one shown in Figure 4.25 is displayed. Notes 1. When configured for operation in automatic mode, the table becomes coloured (instead of grey, as it is when in manual mode). 2.
Web GUI Monitoring & Control Figure 4.25: Stream Isolation Window in Automatic Mode In the example above, only ‘Output 0’ is enabled. As the output interface modulation and coding parameter is currently set to ANY, then all the legal MODCOD values are ‘Not Filtered’, meaning that they are allowed through the MODCOD filter to the output interface. 4.9.2.
Web GUI Monitoring & Control Figure 4.26: Stream Isolation - Assignment ISI Deactivated A further example is given in Figures 4.27 and 4.28 in which output interfaces ‘Output 0’ and ‘Output1’ have been enabled. Both output interfaces have been configured to use specific modulation and coding; 16APSK rate 2/3 in the case of ‘Output 0’ and QPSK 8/9 in the case of ‘Output 1’. Figure 4.
Web GUI Monitoring & Control Figure 4.28: Stream Isolation – Output 1 Enabled The status of the MODCOD filter now shows that only two MODCOD are allowed, as shown by the green wording ‘Not filtered’. Base-band frames arriving at the demodulator on all other MODCOD bearers will be discarded.
Web GUI Monitoring & Control Figure 4.29: Manual Mode 4.9.2.3.1 MODCOD Filter To activate the MODCOD filter: 1. Check the ‘Activate’ box. The table now appears coloured (instead of grey as it was when the feature was inactive. Initially, there is no selectivity, and all legal MODCODs are ‘Not filtered’, i.e. they will be passed through to the output interfaces. 2. Use check boxes above each column, and to the left of each row, to activate the filter for specific modulation types or code rates.
Web GUI Monitoring & Control Figure 4.30: Stream Isolation – Selection of MODCOD Rates 4.9.2.4 ISI Assignment Function – Activated The configuration of the ISI Assignment function may be viewed by opening the ‘Current View’ drop-down box and selecting Assign ISI. A window, similar to that shown in Figure 4.31 is displayed. In this example, the ISI assignment is activated as the ‘Activate’ box is checked and the table appears coloured (instead of grey as it was when the feature was inactive).
Web GUI Monitoring & Control Figure 4.31: Stream Isolation - Assignment ISI Activated When the feature is active, the user can enter ISI values in any of the legal MODCOD boxes. ISI values in the range 0 to 255 inclusive may be entered. In the example shown in Figure 4.32, the user has configured one stream, ISI=1, to occupy a range of QPSK MODCODs, from rate 3/5 to 8/9 inclusive. A second stream, ISI=2, is only expected in base-band frames transmitted using the 16APSK rate 3/4 MODCOD. Notes 1.
Web GUI Monitoring & Control Figure 4.32: Stream Isolation – Configuration Example 4.9.3 Advanced The advanced configuration functions may be viewed by selecting the ‘Advanced’ tab from the Configuration Main window. A window, similar to that shown in Figure 4.33 is displayed. Note Users should be aware that the controls on the ‘Advanced’ panel must be used with extreme caution, as they can have quite deleterious effects except under certain very specific circumstances.
Web GUI Monitoring & Control Figure 4.33: Advanced Functions Main Window 4.9.3.1 Padding Support The DVB-S2 specification provides for the use of padding to achieve certain link operation goals. Unfortunately, the use of padding makes the link behaviour very vulnerable to un-correctable transmission errors. By default, padding support is disabled. In this case, the field of the base-band header, which is used to implement padding (DFL), is ignored.
Web GUI Monitoring & Control Consequently, streams borne on frames with less robust modulation and/or coding may be prevented from contaminating other more robust streams. But it must be remembered that occasional un-corrected transmission errors on a robust stream will result in the loss of entire baseband frames. 4.9.3.3 PLS Seed The DVB-S2 physical layer specification makes provision for the application of user specific physical layer scrambling.
Web GUI Monitoring & Control Figure 4.35: Saving a New Profile To overwrite an existing profile: 4.9.4.2 1. Select the profile to be overwritten from the main Profiles window. 2. Enter a new profile name (e.g. MuxA) in the adjacent text box. 3. Select ‘Save’. Loading Existing Profiles To load an existing named profile: 1. Select the profile to be loaded from the main Profiles window. A window similar to that shown in Figure 4.36 is displayed. 2. Select ‘Load’. 3.
Web GUI Monitoring & Control Figure 4.36: Loading an Existing Profile 4.9.4.3 Downloading a Profile Occasionally it is necessary to clone a profile, or a set of profiles, amongst a family of units. To clone a profile: 1. 4-40 Select the profile to be cloned from the profiles main window. A window similar to that shown in Figure 4.37 is displayed.
Web GUI Monitoring & Control Figure 4.37: Downloading a Profile 2. Select the Download link. A window similar to that shown in Figure 4.38 is displayed. Figure 4.38: Downloaded Profiles List 3. Select all displayed files and save to a network file.
Web GUI Monitoring & Control 4.9.4.4 Uploading a Profile Uploading is essentially the second stage in cloning a profile. To upload a profile: 1. Select the ‘Browse’ button. A window similar to that shown in Figure 4.39 is displayed. Figure 4.39: Choose file Window 4.9.5 2. Select the file selected in the download operation. 3. Select ‘Send’ to upload the file and create a new profile. Output At the bottom of the Configuration panel is the area used to configure the output interfaces (See figure 4.
Web GUI Monitoring & Control 4.9.5.3 Output Mode The output Mode drop-down box has two settings which are described in the following paragraphs. 4.9.5.3.1 Normal Mode In normal mode, the data in the stream specified by the programmed ISI is presented at the relevant ASI output. If the demodulator is operating in CCM mode, the output data will appear at a constant rate.
Web GUI Monitoring & Control Selecting this mode overrides the ISI received in the base-band header, and all 16APSK rate 2/3 frames will be treated as though ISI is set to 1. In this example, the user must ensure that only one stream (ISI 1) is transmitted using 16APSK rate 2/3. Failure to do this will result in output interface malfunction, as two or more streams become incorrectly aggregated. In this case a warning message at the bottom of the window (as shown in Figure 4.42) is displayed.
APPENDIX A: Technical Specification List of Contents List of Tables A.1 Introduction ............................................................... A-2 Table A.1: Technical Specification ............................................ A-2 A.2 Technical Specification ........................................... A-2 A.3 Standards Compliance............................................
Technical Specification A.1 Introduction This appendix details the technical specification and the standards with which it is compliant. A.2 Technical Specification The following table details the technical specification. Table A.
Technical Specification Description Power Supply Specification +5V dc via 96 pin HARTING Type 0903 196 6951 Female Edge Connector 3.5Amps Max when not supplying LNB Power 5.
Technical Specification A.3 Standards Compliance The SBD75e Demodulator is compliant to the following Telecommunication Interface Standards: IEEE RS-422 / RS-449 / RS-530 and CCITT/ITU V.35 interface standards ITU G.703: Physical Electrical Characteristics of Hierarchical Digital Interface.
Technical Specification SBD75e Series Demodulator Installation and Operation Manual A-5
APPENDIX B: Glossary List of Contents B.1 Introduction ............................................................... B-2 B.2 Abbreviations and Technical Terms ....................... B-2 SBD75e Series Demodulator Installation and Operation Manual List of Tables Table B.1: Glossary ........................................................................
Glossary B.1 Introduction This appendix provides a brief explaination of the abbreviations and technical terms used in this manual B.2 Abbreviations and Technical Terms The following table details the glossary. Table B.1: Glossary B-2 Term Description 16-QAM 16 Quadrature Amplitude Modulation: A modulation scheme used for the transmission of digital data, which modifies the amplitude and phase of an RF sinusoidal carrier frequency to represent data symbols.
Glossary Term Description BPSK Binary Phase Shift Keying: A modulation technique used to communicate data over long distances by altering the phase of a carrier signal according to the data binary states. The simplest form of phase shift keying, it uses two phases which are separated by 180° and so can also be termed 2-PSK. Sometimes called PRK, Phase Reversal Keying.
Glossary B-4 Term Description Decoder A unit containing the electronic circuitry necessary to decode encrypted signals. Some Decoders are separate from the receiver but in satellite TV broadcasting, the term is often used interchangeably as a name for an Integrated Receiver Decoder (IRD). The term IRD, or IRD / Decoder, is usually associated with satellite TV broadcasting while Cable systems are based on Converters or on Set-Top Boxes / Converters.
Glossary Term Description Earth Technical Earth: A connection that ensures all equipment chassis within a rack are at the same potential (“commoned”), usually by connecting a wire between the technical earth terminal and a suitable point on the rack. Also called a Functional Earth.
Glossary B-6 Term Description GUI Graphical User Interface: The use of pictures rather than just words to represent the input and output of a program. A program with a GUI runs under a windowing system and has a screen interface capable of displaying graphics in the form of icons, drop-down menus and a movable pointer. The on-screen information is usually controlled / manipulated by a mouse or keyboard.
Glossary Term Description JPEG Joint Photographic Experts Group: ISO/ITU standard for compressing still images. It has a high compression capability. Using discrete cosine transform, it provides user specified compression ratios up to around 100:1 (there is a trade-off between image quality and file size). kbit/s 1000 bits per second. Kbit 1024 bits, usually refers to memory capacity or allocation. Ku-band ITU-defined frequency range from 12 GHz to 18 GHz.
Glossary Term Description Mbit/s Million bits per second. MCPC Multiple Channels Per Carrier. MIB Management Information Base: A type of database used to manage the devices in a communications network. It comprises a collection of objects in a (virtual) database used to manage entities (such as routers and switches) in a network. MP@ML Main Profile at Main Level: A subset of the MPEG-2 standard, which supports digital video storage (DVD etc.) and transmissions up to 15 Mbit/s over various mediums.
Glossary Term Description OQPSK Offset Quadrature Phase Shift Keying: A variant of phase-shift keying modulation using 4 different values of the phase to transmit. It is sometimes called Staggered quadrature phase-shift keying (SQPSK). OSD On-screen display: Messages and graphics, typically originating from the SMS, and displayed on the subscriber’s TV screen by the IRD, to inform the subscriber of problems or instruct the subscriber to contact the SMS.
Glossary B-10 Term Description QPSK Quadrature Phase Shift Keying: A modulation technique used to communicate data over long distances by altering the phase of a carrier signal according to the four data states. Sometimes known as quaternary or quadriphase PSK, 4-PSK, or 4-QAM. RF Radio Frequency. RS Reed-Solomon coding: An error detection and correction, coding system.
Glossary Term Description Spectral Scrambling A process (in digital transmission) used to combine a digital signal with a pseudo-random sequence, producing a randomised digital signal that conveys the original information in a form optimised for a broadcast channel. TCP / IP Transmission Control Protocol/Internet Protocol: A set of communications protocols used to connect different computers over networks (in particular the internet).
Glossary B-12 SBD75e Series Demodulator Installation and Operation Manual
