User Manual MTM400 MPEG Transport Stream Monitor 071-1224-04 Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - FAX 781.665.0780 - TestEquipmentDepot.
Table of Contents General Safety Summary ...................................................................................... vii Service Safety Summary.........................................................................................ix Preface.....................................................................................................................xi Related Material....................................................................................................
Table of Contents PIDs Screen.........................................................................................................3-34 PID Groups Screen..............................................................................................3-41 PCR Jitter Screen ................................................................................................3-48 SFN Screen..........................................................................................................3-56 TMCC Screen.....
Table of Contents Appendices Appendix A: Network Installation ................................................................... A-1 MAC Address ...................................................................................................... A-2 IP Address............................................................................................................ A-3 Resetting the IP Address ...................................................................................... A-3 Network Set-Up ....
Table of Contents List of Figures Figure 1-1: MTM400 connectors (shown with QPSK interface)....................................... 1-9 Figure 1-2: Logging on .................................................................................................... 1-15 Figure 1-3: Hotspot view ................................................................................................. 1-16 Figure 1-4: Summary view ..............................................................................................
Table of Contents Figure 3-25: ATSC SI Tables dialog................................................................................3-63 Figure 3-26: ISDB-T SI Tables dialog .............................................................................3-64 Figure 3-27: SI Tables view - Tear off view ....................................................................3-66 Figure 3-28: Stream view - Template...............................................................................
Table of Contents List of Tables Table 1-1: Standard MTM400 deliverables ....................................................................... 1-2 Table 1-2: MTM400 options (continued) .......................................................................... 1-2 Table 1-3: MTM400 power cord options........................................................................... 1-3 Table 1-4: MTM400 field upgrade kits..............................................................................
General Safety Summary Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it. To avoid potential hazards, use this product only as specified. Only qualified personnel should perform service procedures. To Avoid Fire or Personal Injury Use Proper Power Cord. Use only the power cord specified for this product and certified for the country of use. Ground the Product.
General Safety Summary Symbols and Terms Terms in this Manual. These terms may appear in this manual: WARNING. Warning statements identify conditions or practices that could result in injury or loss of life. CAUTION. Caution statements identify conditions or practices that could result in damage to this product or other property. Terms on the Product. These terms may appear on the product: DANGER indicates an injury hazard immediately accessible as you read the marking.
Service Safety Summary Only qualified personnel should perform service procedures. Read this Service Safety Summary and the General Safety Summary before performing any service procedures. Do Not Service Alone. Do not perform internal service or adjustments of this product unless another person capable of rendering first aid and resuscitation is present. Disconnect Power. To avoid electric shock, switch off the instrument power, then disconnect the power cord from the mains power.
Preface This manual describes the functions and use of the Tektronix MTM400 MPEG Transport Stream Monitor. The manual is organized into the following sections: Getting Started An overview of the MTM400, installation instructions, starting the unit, and the remote user interface. Operating Basics A basic guide to the MTM400 user interface(s). Reference A complete reference to all of the MTM400 features as accessed through the user interface.
Preface Related Material Additional documentation, such as Read Me files, may be included on the installation disks. The following URLs access the Web sites for the standards organizations listed (the URLs listed were valid at the time of writing): MPEG-2 standards (International Organization for Standards) http://www.iso.ch/ DVB standards (European Technical Standards Institute) http://www.etsi.org/ ATSC standards (Advanced Television Systems Committee) http://www.atsc.
Preface Manual Conventions Naming conventions for the interface elements are based on standard Windows naming conventions. Naming conventions for MPEG-2, ATSC, and DVB structures follow the conventions derived from the standards organizations listed on the previous page.
Getting Started
Getting Started This section provides details of installing and powering up the Tektronix MTM400 MPEG Transport Stream Monitor. Overview The MTM400 is a single-stream, extended-confidence, MPEG-2 protocol, monitoring device. It is used to monitor a single transport stream in MPEG-2, DVB, ISDB and ATSC environments. The MTM400 is a rack-mounted device.
Getting Started Accessories The tables in this section list the standard and optional accessories available for the MTM400 MPEG Transport Stream Monitor. Standard Table 1-1 lists the standard accessories that are shipped with the MTM400.
Getting Started Table 1-2: MTM400 options (continued) Nomenclature Description Deliverables Opt. QP QPSK (L-Band) Interface QPSK Interface Card with associated cabling Opt. CF COFDM Interface COFDM Interface Card with associated cabling Opt. VS 8VSB Interface 8VSB Interface Card with associated cabling Opt.
Getting Started Field Upgrade Kits Field upgrade kits contain hardware and software that can be installed by a user. Table 1-4 lists the Field Upgrade kits that are available for the MTM400.
Getting Started Licensing Options and upgrades are enabled using a License Key. A License Key is an encrypted code that unlocks and enables functions that have been installed on the Real-Time Monitoring (RTM) device. Using this method, upgrading an RTM device may simply require the entry of a new License Key. For new RTM devices, the appropriate License Key is applied during production. However, it is also supplied as part of the product documentation.
Getting Started Table 1-5 (parts 1 and 2) summarizes the available streams options: Table 1-5: MTM400 options summary (part 1 of 2) Feature Default * SFN 9 TMCC 9 PCR OJ, DR and FO testing 9 Opt. 01 Recording Capability Opt. 02 SI Analysis SI View 9 SI Graphs 9 Opt.
Getting Started Table 1-5: MTM400 options summary (part 2 of 2) Feature Opt. 04 PCR Analysis Opt. 05 Bit rate Testing Opt.
Getting Started Installing the MTM400 This section describes how to install the MTM400 unit. It includes the following instructions: Installing the unit in a rack Making the electrical connections necessary to begin monitoring transport streams Integrating the unit into a network Operation is described in the following sections. Hardware Installation The MTM400 is designed for rack-mounted operation. The rack-mounting kit is shipped as a standard accessory with each MTM400.
Getting Started Electrical Installation The electrical operating requirements of the MTM400 are summarized in Table 1-6; see the MTM400 MPEG Transport Stream Monitor Technical Reference for more detailed electrical characteristics. Table 1-6: Electrical operating requirements Requirement Specification Temperature, operating +5 ˚C to +40 ˚C Altitude, operating 0 m to 3000 m (9800 ft) Source Voltage 100 VAC to 240 VAC, 50 Hz/60 Hz Power Consumption (maximum) 1 Amp Peak Inrush Current 7.
Getting Started Table 1-7 summarizes the transport stream, network and peripheral device connectors; (see the MTM400 MPEG Transport Stream Monitor Technical Reference for more detailed information about each connector and the associated signals).
Getting Started Network Installation The MTM400 is designed to operate in a networked (TCP/IP) environment. The network or system administrator may have already configured the TCP/IP parameters (including the network identity) for the MTM400. If this is not the case, refer to Appendix A: Network Installation for procedures to configure the TCP/IP parameters.
Getting Started Installing Font Extensions on Your PC The ARIB specifications for ISDB make use of private extensions to the standard Unicode character set [0xE000-0xF8FF]. These extensions provide additional characters and non-standard proprietary characters; they are used to extend an existing font. Check with the transport stream broadcaster for the availability of any font extension set for their transport stream.
Getting Started Powering Up the MTM400 After the connections have been made to the unit, all that is required to power up the MTM400 is to apply power. Connect the power cord to a properly grounded outlet. Connect the other end of the cord to the product's power input (see Figure 1-1). There is no mains disconnect switch. Initialization will begin as soon as power is connected to the power input. The LEDs on the front panel will indicate activity (see Local Indicators, page 2-2).
Getting Started The Remote User Interface The Remote User Interface (RUI) provides a means of accessing the MTM400 configuration and monitoring features. The RUI can be run on any personal computer (client PC) that meets the minimum specification and has network access to the MTM400 unit. The full specification is given in the MTM400 MPEG Transport Stream Monitor Technical Reference. Logging on To access the configuration and monitoring features of the MTM400, use the following procedure: 1.
Getting Started The MTM400 splash screen is displayed overlaid shortly thereafter by the Login Details dialog: Figure 1-2: Logging on 3. Select the User name (Administrator or User from the drop-down list). Two User Names are available at installation: Administrator and User. Administrator: Gives full read/write access to all views and settings, including options where installed. User: Gives read only access to all views and settings, including options where installed. You can also reset alarms. 4.
Getting Started 5. The Hotspot and Stream views are displayed. Figure 1-3: Hotspot view Figure 1-4: Summary view The Hotspot view provides access to the device and stream monitoring views of the MTM400 being accessed.
Getting Started High Level Monitoring The Hot Spot view allows the overall state of the MTM400 device and the stream to be viewed; each hotspot is appropriately labeled. The color of the Hot Spot button indicates the error status of the item to which it is linked (see Color Coding, page 2-11). In the Hot Spot view, the error state of the linked item is as follows: Device - the highest error state of the MTM400 device. Stream - the highest error state of the stream.
Getting Started 1-18 MTM400 MPEG Transport Stream Monitor User Manual
Operating Basics
Operating Basics This section provides an overview of the basic operation of the system; details and background material are found in the Reference section. The monitoring activity of the MTM400 can be observed in three ways: Local indicators Remote User Interface (RUI) WebMSM Options are available to the RUI and the WebMSM to upgrade the monitoring from simple conformance checking to full diagnostic capability using license keys.
Operating Basics Local Indicators The MTM400 is an MPEG monitor for use in remote situations and does not have a local graphical user interface display. However, a local interface, consisting of four front-panel LEDs, can assure you that the MTM400 unit is functioning. ATSC M T M 400 MPEG Transport Stream Monitor SYNC STATUS ETHERNET SYSTEM Figure 2-1: Front panel These LEDs indicate the following: SYNC Indicates that a valid MPEG transport stream is connected to the unit.
Operating Basics Remote User Interface The Remote User Interface (RUI) allows you to configure and monitor the MTM400. The RUI can be run on any personal computer (client PC) that meets the minimum specifications (refer to MTM400 MPEG Transport Stream Monitor Technical Reference) and that has access to the MTM400 unit. You can open the RUI of more than one RTM device by opening a new browser window each time; however, this may place an excessive processing load on your PC.
Operating Basics Hot Spot View The Hot Spot view lets you see the overall state of the MTM400 and the stream; each hotspot is appropriately labeled. Figure 2-3: Hotspot view The color of the Hot Spot button indicates the error status of the item to which it is linked (see Color Coding, page 2-11). For example, in Figure 2-3, the Device button is green and the Stream button is yellow. This indicates that no errors have occurred on the device; an error has been noted on the stream, but it is currently OK.
Operating Basics Device View The Device view allows you to monitor and set parameters specific to the MTM400 device itself. The view contains a menu bar with various buttons, and an information view. You can choose the information that appears in the view by pressing the appropriate button. The button color indicates the overall state of the information in the corresponding view (see Color Coding, page 2-11).
Operating Basics Stream View The Stream view allows you to monitor and set parameters specific to the stream being monitored. As with the Device view, the screen consists of a menu bar with various buttons, and an information view. You can choose the information that appears in the view by pressing the appropriate button. The color of the button shows the overall state of the information that will be shown in the corresponding view (see Color Coding, page 2-11).
Operating Basics The information takes the form of a series of screens; a brief summary of each follows: Summary A dynamic visual overview of the stream and monitoring status. The information is updated at regular intervals. (See page 3-20.) Detail Displays the detailed information about the stream according to SI tables, PIDs, or Program. (See page 3-22.) Tests Displays the state of the tests applied to the stream.
Operating Basics PCR Jitter * Displays the following PCR graphs: Inaccuracy, Arrival, Overall Jitter, Frequency Offset, and Drift Rate. (See page 3-48.) SFN Displays the Single Frequency Network (SFN) information when available. (See page 3-56.) TMCC Displays the Transmission and Multiplexing Configuration Control (TMCC) and IIP information when available. (Only available for ISDB streams) (See page 3-57.
Operating Basics Device and Stream View Manipulation The manipulation of the Device and Streams views is similar. Each view consists of a Button bar and an information window. The two view elements can be displayed either combined (a single window with the Button bar on the left) or as separate elements (the Button Bar and the information window are displayed separately). When displayed as separate windows, multiple information windows can be opened.
Operating Basics Multiple View. Figure 2-7 illustrates the multiple Device view; the Streams view is similar. Each time you select a function button, a new window opens. Figure 2-7: Multiple view When switching from multiple view to combined view, you will be asked to acknowledge that all the function windows will close before the combined view window can be displayed. The individual Device and Streams function windows are described in the Reference section of this manual.
Operating Basics Color Coding In the RUI Hot Spot View, the Device and Stream buttons use the color scheme shown in Table 2-1. Table 2-1: Button colors - Hot Spot views Icon Color Meaning Green Operation normal — no error detected. Red Error detected and still present. Yellow Transient error, which has now corrected itself. Gray The corresponding test has been disabled (or is unavailable). All buttons gray indicates that connection to a device has been lost.
Operating Basics Using WebMSM If you have a system consisting of MTM400 units, you can expand your monitoring capabilities by using the WebMSM Monitoring System Manager. The WebMSM software is effectively an installed version of the RUI. The WebMSM software provides additional functionality by allowing you to create hierarchical network views of your systems using the WebMSM Configuration Editor, and monitor and control multiple devices. The WebMSM user interface is similar to the RUI.
Operating Basics Time Zones An inevitable consequence of allowing the RTM device user interface to be accessed across networks is the crossing of time zones. Various features of the user interface display timing information, including the Log files. You need to know the time source being used to record events. Also, when scheduling the loading of configuration files, time zones must be taken into account (see Scheduling, page 3-91).
Reference
Device View The Reference section provides a detailed description of each of the views available in the RUI. The descriptions are given in the order in which they appear in the two primary views: Device and Streams. The Device view allows you to monitor and set parameters specific to the MTM400 unit. The view consists of a menu bar with various buttons, and an information view. You can choose the information that appears in the view by pressing the appropriate button.
Device View Device Status The Device Status option displays a screen that shows the status of MTM400 device events (as opposed to stream events). Figure 3-2: Device view - Status The events displayed will depend on the RTM device type; those currently shown for the MTM400 are as follows: Any Device Error Provides an overview of the device error state, which includes the events shown in this panel.
Device View Typical display elements are described in the following paragraphs: State A button showing the State of the event. (See Color Coding, page 2-11.) A right-click on the button will open a popup menu that allows you to reset the error or enable/disable the event monitoring. Double-clicking the button will toggle event monitoring between enabled and disabled. Error Name of the Error event (for example, Fan).
Device View View Device Log The Device Log records device-specific events associated with the selected MTM400. Logged events are displayed in a scrolling list. The Date, Time, Event ID and a description of each event is displayed. Figure 3-3: Device view - Log Highlighting Log Entries To open a pop-up menu from which log entry highlight coloring can be initiated, right-click anywhere within the listing.
Device View Using the Log Entry Highlights dialog allows specific types of entries to be highlighted in a selected color. Select the Event type to be highlighted from the drop-down list adjacent to the Color required; hex values are shown in the event list. Select OK to close the dialog and implement the highlighting. Saving the Device Log The Device Log can be saved using the Download Log… button. In the Log Download dialog, select (or enter) a filename and path and select the Start button.
Device View Time Zone Monitoring devices across time zones may cause some confusion with respect to the timing of events. The displayed times at which log events occurred can be adjusted by making a selection from the Time Zone drop-down list at the top of the window. The following options are available: Local The time local to the machine on which MTM400 Remote User Interface is currently running. UTC Universal Coordinated Time. RTM Device The time local to the RTM device being monitored.
Device View Set Time… Allows the RTM device time to be set. (See Set Time, page 3-9.) Upload Device Firmware… Allows new firmware to be uploaded to overwrite the existing device firmware. (See Firmware Upload, page 3-11.) Upload I/F Card Firmware… Allows new firmware to be uploaded to overwrite the existing interface card firmware. (See Firmware Upload, page 3-11.) Set Device Passwords Allows the RUI passwords to be set. (See Passwords, page 3-13.) Reset Device Resets the MTM400 by rebooting.
Device View When the network settings have been changed and set and Close is selected, the following dialog is displayed: For the network settings to take effect, select OK to restart the device. Select Cancel if a restart is not required. The new settings will not take effect until the unit is restarted. If necessary, obtain the IP Address, Gateway and Subnet Mask values from the Network Administrator. NOTE.
Device View Set Time You can coordinate the time used by the RTM device and/or the remote user interface. (For a general description of the timing model, see Time Zones, page 2-13.) Three time sources are available to the MTM400 from the Time Source drop-down menu. Real Time Clock The MTM400 internal clock. LTC (Longitudinal Time Clock) An analogue format time clock often available from a centralized source.
Device View Universal Time) and may be offset to allow for local time variations, for example, British Summer Time = +60 minutes. The adjusted time is shown. With Real Time Clock selected from the Time Source drop-down list, the RTM device can be synchronized to local PC time using Sync with Local. Any offset required (for a different time zone) is entered in the UTC to Time Zone Offset field in minutes (range: ±12 hours) and activated using Set. NOTE.
Device View Firmware Upload If new device or interface card firmware is available, this function allows you to upload it to the respective device. The firmware filename format is *.hex. Device Firmware Upload. CAUTION. The Device Log must be cleared immediately before uploading the firmware. 1. Clear the Device Log. 2. Select Upload Device Firmware. 3. Identify the firmware file either by entering the path and filename or by using Browse. 4. Select Start to upload the firmware. CAUTION.
Device View 5. Select Close when the process has completed or to terminate the process. Interface Card Firmware Upload. NOTE. This feature will only be used for interim updates of the Interface Card Firmware. The update will comprise up to three files. Documentation specifying Card Type and ROM number to be used will be supplied with the firmware files. The firmware is uploaded to non-volatile RAM on the card.
Device View 4. Identify the firmware Filename: (either by entering the path and filename or using Browse. 5. Select Start to upload the firmware. Select Close when the process has completed or to terminate the process. Passwords Use the Password feature in the device configuration to change the current password. This is the password that will be required when you access the device through the RUI. The password file created is stored on the RTM device.
Device View Upload License A license key is applied to each RTM device to enable functionality. When new or upgraded functions are added, for example as part of a field upgrade, you will receive a new license key with the upgrade kit. Use the License Upload dialog to apply the new license key. Enter the new License Key; this will accompany the upgrade documentation. Select Upload. The result will be displayed. The license key will be stored on the RTM device.
Device View Device Information The Info view details the software and hardware build state of the MTM400. (The values shown in this example will differ from the values shown on your display.
Device View SNMP The MTM400 Simple Network Management Protocol (SNMP) agent is a software process that responds to queries using the SNMP to provide status and statistics about the MTM400. This enables management applications to be developed that can access MTM400 units remotely across a network using SNMP. Each of the events available from the MTM400 is kept in a database described by a Management Information Base (MIB). The various values that can be retrieved from the MIB are called MIB variables.
Stream View The Stream view provides information about the monitored stream. Figure 3-6: Stream view The title bar displays the Stream Name (configured by the user), and the current view type. The information takes the form of a series of screens; a brief summary of each follows: Summary A dynamic visual overview of the stream and monitoring status. The information is updated at regular intervals. (See page 3-20.
Stream View Tests Displays the state of the tests applied to the stream. It also allows users with read-write permissions (Administrators) to configure alarms and relays and parameters associated with each test. (See page 3-23.) Information Displays events not normally logged in the Stream log; for example, PAT/PMT version changes. (See page 3-28.) Custom Displays the state of the tests in the same way as the Tests view, but categorized as Critical, Major, Minor or Warning.
Stream View SI Graphs * Displays information about repetition rates of SI tables and subtables in graphical format. (See page 3-58.) SI Tables * Displays the SI Information for the stream. (See page 3-62.) Template * Displays the structure and status of templates applied to the stream. (See page 3-68.) Recording * Displays the Triggered Recording setup screen. (See page 3-71.) Log Displays the stream log. (See page 3-72.) Config Displays general configuration parameters for the stream.
Stream View Monitoring Overview Screen (Summary Screen) This screen provides a dynamic visual overview of the stream and monitoring status. The information is updated at regular intervals. Figure 3-7: Stream view - Overview The upper half of the Overview screen displays service information in the form of a pie chart and a list. Services are named and color coded to allow correlation between the pie chart and the list. The pie percentage value of the NULL PID relates to the stream bitrate.
Stream View The lower half of the screen displays an overview of the tests applied to the stream. The tests are grouped as follows: First Priority: Lists the first priority tests in DVB, ISDB or ATSC order. Other: Summarizes all test groups except First Priority. The groups are derived from the Tests screen (see page 3-23). Custom: Represents the highest error state present in the events associated with the category. (These can be edited on the Custom screen, see page 3-26.
Stream View Detail Screen This screen provides a dynamic, detail view of the stream PIDs. The information is updated at regular intervals. Figure 3-8: Stream view – Detail The Detail screen button offers three options. All PIDs displays details of all the PIDs in the stream. SI Tables displays details of only those PIDs that are carrying service information table information. Programs… allows you to select a single program and display details of the associated PIDs.
Stream View Tests Screen The Tests screen displays the results of tests on the current stream grouped in DVB, ISDB or ATSC priority order. Additional proprietary tests are grouped by function; for example, Bit Rate tests and PID Tests. Figure 3-9: Stream view - Tests A full list of tests and their associated parameters is given in the MTM400 MPEG Transport Stream Monitor Programmer Manual. The Tests and Custom screens provide the same information prioritized in different ways.
Stream View The alarm output specifications are given in MTM400 MPEG Transport Stream Monitor Technical Reference Manual. Each test can be enabled/disabled by double-clicking the appropriate icon. Only administrators can set parameters, enable and disable tests and set alarms. The button (State) to the left of the test name (Error) shows the current status of the test (see Color Coding, page 2-11).
Stream View ; On ; Relay (RLY1 to RLY5) Off Indicates whether a relay will activate when an error occurs. Double-click the icon to toggle its state: enabled or disabled. Five relays are available (Rly1, Rly2, Rly3, Rly4 and Rly5). The relay connections are given in the relevant RTM device user guide. Rec ○ ● Off - , Set - ; This icon, when active, indicates that the test has been selected as a trigger for recording a stream.
Stream View Custom Screen Figure 3-10: Stream view - Custom The Tests and Custom screens provide the same information prioritized in different ways. In the Custom screen, test results for the current stream are grouped in Event Classification order. Setting up the Event Classification is described below. All fields in the view are as described in the Test screen section (page 3-23). Only users logged on as Administrators can set parameters, enable and disable tests and set alarms.
Stream View Stream Event Classification The Stream Event Classification dialog is opened by selecting the Custom Classifications… button in the Custom view. The dialog box allows the associated Event Classification file to be temporarily modified. All changes made will be lost when the current session is ended by closing the MTM400. (When accessed via the WebMSM, these changes are saved.
Stream View Select the Close button to retain the temporary settings and close the dialog. Information Screen The Information screen displays stream events and messages. Stream events and messages may be logged but do not constitute a test failure; for example, a version change of a table carried in the SI/PSI is reported in the stream log but is not subject to a standard test. The only place that these stream events are recorded is in the stream logs.
Stream View Right-click the error LED to set parameters, enable and disable tests and set alarms. State Icons The State icons used in the Information screen are as shown in Table 3-1: Table 3-1: Button colors - Information view Icon Color Meaning Green Idle - the event is not happening at this time. Blue Event detected and still present. Yellow Transient message, which has now corrected itself. Gray The event has been disabled (or is unavailable).
Stream View Programs Screen The Programs screen provides a quick overview of the program contents of a transport stream. Figure 3-12: Stream View - Programs In this view, all the programs detected in the incoming transport stream are displayed.
Stream View The view contains the following elements (more detailed descriptions follow): Title Bar The title bar of the screen displays the name of the stream under test (assigned on the Configuration Screen (see page 3-76). Transport Stream: The transport stream identity. Packet Size: The transport stream packet size. Stream Bit Rate: The total bit rate of the stream. Hex Display If enabled, the Transport Stream ID and the program ID are displayed in hex format.
Stream View Only administrators can adjust bit rate limits. Bit Rates The program bit rate (Bit Rate) shows the sum of the individual bit rates for all the PIDs that make up the program. NOTE. It is possible that in certain transport streams, different programs may reference a single PID; for example, programs may reference one PCR PID. In these cases, the PID bit-rate will be included in all the programs from which the PID is referenced.
Stream View The maximum and minimum bit rate limits are set in the Limits dialog. Click on the program bar to open the dialog box: Only users logged on as Administrator can adjust bit rate limits. Users logged on as User can only view the limits. The maximum and minimum values can be set either by using the appropriate slider bar or by entering a value in the numeric field. Values are expressed in kilobytes per second. The Enabled checkbox must be selected before the limit will be implemented.
Stream View PIDs Screen The PIDs screen provides an overview of the PIDs contained in a transport stream sorted by program. Figure 3-13: Stream view - PIDs In this view, all the PIDs detected in the incoming transport stream are displayed. The PIDs are grouped by program; PIDs not associated with specific programs are displayed in numerical order below the program listings under the section title Other PIDs in the Multiplex.
Stream View Stream Bit Rate: The total bit rate of the stream. Hex Display If enabled, the Transport Stream ID and the PID identities are displayed in hex format. If disabled, they are displayed in decimal format. Test: Allows specific tests, selected from the drop-down list, to be applied to all of the PIDs in the stream. The state of the test is indicated for each PID by the Test icon. If a test is not relevant to a PID, the test is disabled for that PID; the Test icon indicates this.
Stream View Double-clicking the icon will disable/enable the event monitoring. Scrambled A key icon is shown adjacent to conditional access tables, for example, EMM/ECM. A padlock icon is shown if the PID is scrambled. Type The data type carried by the PID, for example, Video+PCR, MPEG Audio. Multiplex Occupancy A graphical representation of the PID bit rate. The bar color indicates the error status of the PID.
Stream View Change Bar The variation of bit rate in each PID is indicated by a Change Bar (except when PID Variability is selected). The ends of the Change Bar show the maximum and minimum values of the bit rate since monitoring started or since the change bars were last reset. Change Bar The Change Bar on all PIDs can be reset by selecting the Reset Change Bars button at the top of the PIDs screen. Bit Rate Limits For each PID you can set a minimum ( ) and maximum ( ) bit rate limit.
Stream View The maximum and minimum bit rate limits are set in the Limits dialog. Click on the program bar to open the dialog box: The maximum and minimum values can be set either using the appropriate slider bar or by entering a value in the numeric field. Values are expressed in kilobytes per second. The Enabled checkbox must be selected before the limit will be tested.
Stream View Adding a User PID. 1. From the PIDs screen, select User PIDs…. The User PIDs dialog box is displayed. 2. Enter the PID ID in the New PID: field. The PID ID can be entered in either Hex (0xnnnn) or decimal (nnnn) format. 3. Select Add. The PID ID will be displayed in the PIDs: list and subsequently in the PIDs view. It will be displayed in decimal format. Deleting a User PID. 1. From the PIDs screen, select User PIDs…. The User PIDs dialog box is displayed. 2.
Stream View Test Selection The Test: drop-down list allows the user to select and apply specific tests to the PIDs in the stream. Tests on those PIDs to which the selected test is not applicable are disabled.
Stream View PID Groups Screen PIDs can be grouped together to enable composite bit rate and test reporting of user-selected PIDs, perhaps carrying similar information. Up to 32 PID Groups can be formed. A maximum of 128 PIDs can be included in each of these 32 groups. Figure 3-14: Stream view - PID groups In this view, the PID Groups set up for the incoming transport stream are displayed. PID Group editing is performed using this screen.
Stream View Stream Bit Rate: The total bit rate of the stream. Table Each PID Group formed displays a title bar carrying the allocated name of the group. Each PID Group displays the following information: State Icon showing the state of the PID Group (whether the bit rate limits are exceeded). Multiplex Occupancy: A graphical representation of the total bit rate of the PID Group. The bar color indicates the error status of the PID Group.
Stream View PID Group Management This section describes how to add, edit, and remove PID Groups. Only an Administrator can add and delete PID Groups. Adding a New PID Group. PID Groups are created in three stages: Identify the PIDs to be grouped. Create a new, named PID Group. Populate the new PID Group. The procedure is as follows: 1. Use the PID screen to identify the PIDs to be grouped. The hex or the decimal PID can be used. 2. In the PID Group screen, select New PID Group…. 3.
Stream View 4. The new PID Group is displayed in the PID Group screen: The new PID Group is empty and must be populated with PIDs. 3-44 5. Select PIDs… from the new group title bar. 6. In the PIDs dialog box and in the New PID: field, enter the identity of one PID in either hex (0xnnnn) or decimal (nnn) format. 7. Select Add. The PID is added to the PIDs: field.
Stream View 8. Repeat the previous steps until all the PIDs to be included in the group have been added and are listed. 9. Select Close to close the dialog box. Display will begin immediately, confirming that the PID Group is operational.
Stream View Editing a PID Group. To add or remove a PID from a PID Group, select PIDs… from the PID Group title bar. Delete removes the PID highlighted in the PIDs: field. The PID is removed from the PIDs: field. Add adds the PID identified in the New PID: field to the PID Group. The PID is added to the PIDs: field. Change Bar The variation of bit rate in each PID is indicated by a Change Bar.
Stream View Bit Rate Limits For each PID Group, you can set a minimum ( ) and maximum ( ) bit rate limit. If the incoming bit rate falls outside the values that have been set, an alarm is indicated on the screen by the graphical bit rate bar changing from green to red or yellow; the corresponding State icon is also set to the correct color. This test can also activate the external alarm outputs.
Stream View PCR Jitter Screen Real time analysis is performed on PCRs and displayed in graphical format. The following options are available: PCR Arrival PCR Inaccuracy (PCR_AC) PCR Overall Jitter (PCR_OJ) PCR Drift Rate (PCR_DR) PCR Frequency Offset (PCR_FO) PTS Arrival Selecting the PCR Jitter button displays a pop-up menu from which the graph type can be selected.
Stream View The PCR to be displayed can then be selected in the Select PCR PID dialog box. PID numbers are displayed in decimal and hex form. Common Elements Statistical information for each graph is shown at the bottom of each graph. When enabled, the View Limits checkbox ensures that the parameter limits are shown on the Y-axis. When disabled, the data is allowed to expand to fill the available screen. Limits are set using the parameter function on the Test and PID screens.
Stream View Figure 3-15: Stream view - PCR graph - PCR inaccuracy The MPEG-2, DVB and ATSC standards specify that PCRs must be within ±500 ns of the actual transport rate. By default, the scale is set to ±500 ns. If the Inaccuracy in any of the displayed PIDs is greater than ±500 ns, the y-axis is drawn to show the complete range of values as full scale. The Maximum PCR Accuracy Error can be adjusted for all PIDs as follows: Tests screen Î 2.
Stream View Figure 3-16: Stream view - PCR graph - PCR arrival The PCR Arrival graph provides a display of the time interval between successive PCRs, during the last 256 PCRs. The interval is displayed on the y-axis. Points are color-coded with respect to the Maximum Repetition Period set in DVB test 2.3 (The DVB default value is 40 ms). Points are plotted in blue when they fall within the specified period. Any points that exceed the interval are plotted in red.
Stream View Figure 3-17: Stream view - PCR graph - PCR overall jitter The Maximum PCR Accuracy Error can be adjusted for all PIDs as follows: Tests screen Î PCR Tests section Î PCR Overall Jitter (PCR_OJ) parameter (right-click) Î Max PCR overall jitter. For individual PIDs: 3-52 PIDs screen Î Test: select PCR Jitter Î individual PID parameter (rightclick) Î Max PCR overall jitter. Right-click on the graph and set the limit for each PID.
Stream View PCR Frequency Offset (PCR_FO) The Frequency Offset graph shows the difference between the program clock frequency and the nominal clock frequency (measured against a reference that is not PCR or transport stream derived). Figure 3-18: Stream view - PCR graph - PCR frequency offset PCR Frequency Offset is a measurement of the error in the PCR frequency from the specified 27 MHz; the MPEG specification sets the limits at ±810 Hz.
Stream View PCR Drift Rate (PCR_DR) This Drift Rate graph shows the rate of change of PCR Frequency Offset, which is often very small. It is calculated using PCR Frequency Offset measurements. Figure 3-19: Stream view - PCR graph - PCR drift rate The Maximum PCR Drift Rate can be adjusted for all PIDs as follows: Tests screen Î PCR Tests section Î PCR Drift Rate (PCR_DR) parameter (right-click) Î Max PCR frequency drift rate.
Stream View PTS Arrival The PTS Arrival graph shows the time interval between the successive PTSs. Figure 3-20: Stream view - PCR graph - PTS arrival The Maximum PTS Repetition Interval can be adjusted for individual PIDs as follows: PIDs screen Î Test: select PTS Repetition Î individual PID parameter (right-click) Î Max PTS repetition interval. Right-click on the graph and set the limit for each PID.
Stream View SFN Screen Where Single Frequency Network (SFN) information is included in a stream, it can be viewed by selecting the SFN button. This action will open an SFN Information screen (see Figure 3-21). Figure 3-21: Stream view - SFN screen The screen displays SFN Information when it is transmitted on PID 0x15. The screen displays a snapshot of the Mega Frame Initialization packet in a tree format similar to the SI Tables. The information is updated at regular intervals.
Stream View TMCC Screen This screen shows the Transmission and Multiplexing Configuration Control (TMCC) content of the stream; it is updated in real time. The displayed screen (Satellite or Terrestrial) will depend on which standard is selected for analysis in the Configuration Screen (see page 3-76). In ISDB mode, summary IIP information is also shown. Detailed IIP information appears under the SI Tables view, if licensed.
Stream View SI Graphs Screen The SI Graphs screens display information in graphical format about repetition rates of SI tables and subtables. The following graphs can be displayed: Section Repetition Interval Subtable Inter Section Gap Subtable Repetition Interval Cycle Group Repetition Interval Each graph type can be displayed for a selection of table types. The available graphs vary depending on which standard is selected.
Stream View A brief explanation of each graph type follows: Section Repetition Interval On a specific PID, this is the interval between the arrival of a section with a specific table_id and the next section with the same table_id. Subtable Inter Section Gap This is the interval between the end of one section and the start of the next section in the same subtable. A PID, table_id and table_id extension usually define a subtable, but this varies with table type. (Not available for ATSC.
Stream View Graph Selection All graphs are selected in the same way: 1. 3-60 Select the SI Graphs button to display a pop-up menu from which the graph type can be selected.
Stream View 2. In the Select dialog, select a table type from the drop-down list. Only those table types for which the graphed information is relevant are available in the list. If the table type is not present in the stream, the message No Graphs is displayed. A list of all PIDs carrying the selected table type is displayed. 3. Highlight the PID required and select OK. 4. The associated graph is displayed.
Stream View SI Tables Screen This button displays the SI Tables screen; this shows the transport stream SI/PSI structure. A snapshot of the table structure is built and displayed. The progress bar indicates the progress of the analysis. The analysis can be stopped at any time before completion by selecting Stop; only the analyzed elements will be displayed. The structure can be refreshed at any time by selecting the Update button.
Stream View The DPI table type may be displayed if the relevant license is displayed. At Start-up, a set of default tables is displayed in the SI Tables view. The list can be changed and modified by selecting the Table List… button and selecting the required Tables.
Stream View Figure 3-26: ISDB-T SI Tables dialog The selections do not take effect in the SI Tables view until the view is refreshed using the Update button. The speed of the update depends on the network speed, the SI/PSI complexity, and the selected table types. A tree diagram, with the ‘root node’ or highest level component at the top is represented in this structure. A square box (or node) indicates components that contain more information beneath them in the structure.
Stream View When displaying a selected table type, if the table contains more than one subtable (for example, the EIT_actual_pf), a single subtable is displayed. Other subtables can be selected from the Subtable drop-down menu and displayed.
Stream View Similarly, when displaying a subtable, if the subtable contains more than one section, a single section can be selected from the Section drop-down menu and displayed. Tear Off View A useful feature, which allows you to compare sections of the table, is provided using the Tear Off button. Selecting this button creates a snapshot of the current tables screen in a separate window. This action can be repeated as many times as required; each press of the button will create a separate window.
Stream View Raw Bytes View Data that cannot be interpreted can be viewed in hex format. Sections that can be viewed in this way will be indicated in the SI Table screen (as shown in the following screen shot). Severely errored tables, stuffing tables, and tables having non-standard identities are not included in the SI table display.
Stream View Template Simply monitoring the syntax of a Transport Stream according to TR101 290 is not enough to guarantee that the correct information is being delivered to the viewers' receiver. Ensuring that the contents of the Transport Stream are correct requires the monitoring equipment to have prior knowledge of what the broadcaster plans to transmit.
Stream View Figure 3-28: Stream view - Template The device and stream identities are shown in the title bar. The template currently in use is shown in the field at the top of the screen. The first column shows, in hierarchical and graphical form, the categories of template elements to be applied. Each category can be expanded by clicking on the folder icon (see Template Manipulation on page 3-70). If the element conforms to the template setting, the State icon will be green.
Stream View An example of the template section of the configuration file that gave the screen shot shown in Figure 3-28 is given below: 1101 32 1 0 1 ARD WM2002 1101
Stream View A bullet icon is displayed adjacent to basic components. Selecting the folder icon of an expanded category will collapse the category. XML files can be edited with an XML editor or a text editor (for example, Microsoft Notepad). Templates and Schedules The use of templates can be enhanced by scheduling their application and use. In this way a series of templates can be applied chronologically to a stream. Scheduling is described on page 3-91. Recording See Triggered Recording, page 3-99.
Stream View Log Screen An error event log is maintained for the stream being monitored. Each log has a maximum capacity of 10,000 entries; when full, the oldest entries are dropped to make room for new entries. Figure 3-29: Stream view - Log The title bar of the screen identifies the RTM device and the stream currently being monitored. The Log button displays a screen that contains the events logged for the stream in a scrolling list.
Stream View Manipulating the Log Display When first opened, the most recent events are displayed at the top of the screen; they are scrolled down as new events appear. Using the Home key on the keyboard displays the most recent events; similarly the End key will display the oldest events; in both cases events will continue to scroll. If a single event is to be viewed, selecting the PageDown key will scroll and freeze the display.
Stream View Saving the Stream Log The Stream Log can be saved using the Download Log… button. In the Log Download dialog, select (or enter) a filename and path and select the Start button. Select the Close button when the operation has finished or to terminate the process early. The resulting downloaded log file is saved in CSV (comma separated values) format. Clearing the Stream Log Select Clear Log to clear the current log entries.
Stream View Time Zone The displayed times at which log events occurred can be adjusted by making a selection from the Time Zone drop-down list at the top of the window. The following options are available: Local The time local to the machine on which MTM400 Remote User Interface is currently running. UTC Universal Coordinated Time. RTM Device The time local to the RTM device being monitored. (For a general description of the timing model, see Time Zones, page 2-13.
Stream View Configuration Screen The Stream Configuration screen which allows the user to configure various stream settings, triggered recording, and scheduling. The configuration settings available for DVB, ATSC and ISDB differ; each screen is shown below. The fields displayed are also dependent on the options enabled. The following descriptions describe all settings.
Stream View Figure 3-31: Stream view - Configuration (MTM400 ISDB format) Figure 3-32: Stream view - Configuration (MTM400 ATSC format) Standard Shows the MPEG broadcast standard selected for stream analysis: DVB, ATSC, ISDB or Chinese. MTM400 MPEG Transport Stream Monitor User Manual 3-77 Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - FAX 781.665.0780 - TestEquipmentDepot.
Stream View Region / Type This selection dictates the way in which regional variations in SI Tables view are interpreted. The available options are: Table 3-2: DVB Regional Options DVB Region Description Std Default setting uses standard DVB interpretation of descriptors. DVB + DTG interpretations. DVB + Nordic interpretations. (Not Used.) DVB + Australian interpretations. DTG Nordig Reserved Aus No regional variants are available for the ATSC standard.
Stream View Virtual Channel Table Mode (ATSC only) A drop-down list from which the Virtual Channel Table Mode can be selected. The options available are shown below: Interface A drop-down list from which the interface to be used for the stream is selected. The interfaces available, such as SMPTE, ASI and QPSK (L-Band), will depend upon the RTM device. Config… Opens the configuration dialog for the selected interface. (See page 3-107.) Stream Name Allows you to assign a name to the stream.
Stream View Maintenance Mode When enabled, no alarms (TTL, relays or audible) will be raised for the stream. The RTM device will continue to monitor the stream and errors will be logged. The action of enabling and disabling maintenance mode is also recorded in the log. In this mode, all buttons are colored black. Reset Stream This button returns the MTM400 to the initial state upon acquiring a stream; all tests are reset and all SI information is flushed.
Stream View PID100 PID1 Time t(now) t(-1) 1 t(-63) t(rest) 64 Start time Timespan Count Figure 3-33: Service logging - Data storage The timing resolution should not be set too fast or data may reach the bottom of the grid (t(rest)) before it can be read. If data does reach the bottom of the grid, it is not lost but it is accumulated in the final row. Accumulated data is added to the bottom row for up to three days. After this time the data is discarded and the PID is no longer monitored.
Stream View Figure 3-34: Stream view - Summary The following settings are available: 3-82 Consume Entries The data in the service log is not discarded once it is read; this means that more than one RUI may view the data. One RUI should be nominated to consume the entries. This RUI will then be guaranteed to get all of the data without another RUI consuming the data. Where the data is logged to disk, the logging RUI must be the consuming RUI.
Stream View The timing resolution of counts is controlled by configuration file parameter PS4 (Packet Counting Bin Duration) multiplied by PS6 (Number of Packet Counting Bins), typically PS4 * PS6 is set for 1000 ms. PS4 is the τ (tau) value for the PID occupancy bit rate measurement as defined in TR 101 290. This value affects many measurements; in this case it ensures that the timespan is a whole multiple of the bit rate counting interval and reduces sampling errors.
MTM400 Configuration Files Configuration files provide a means of supplying and storing all stream-related, user-definable parameters active in an RTM device. Configuration files may be complete, containing all parameters, or partial, containing only those parameters that require changing. The files are composed in XML (Extensible Markup Language) format and can contain sections relating to all aspects of configuration; template information can also be included.
MTM400 Configuration Files You can modify the active parameters during normal operation; these changes will only affect the active configuration. The active configuration is saved in non-volatile RAM as operational changes are made and will be recovered after the unit is reset or powered off. The active configuration settings can also be saved to any of the storage slots. The contents of a storage slot can subsequently be downloaded to a file on a remote, networked PC.
MTM400 Configuration Files Storing Active Settings to a Slot The settings currently held in the active configuration can be copied to any storage slot. 1. From the Configuration view, select Store to Slot…. 2. From the list, select the required slot. 3. Select OK. The active configuration settings will be stored in the selected slot. Downloading from a Storage Slot The settings currently held in a storage slot can be copied to a file, for example, for modification. 1.
MTM400 Configuration Files 3. Locate and select the configuration file or type in a new name; use the Browse… button if necessary. 4. Select Start to download the configuration setting from the selected slot. Uploading to a Slot Correctly prepared configuration files can be uploaded to a slot. 1. From the Configuration view, select Upload Slot…. 2. From the Slot: drop-down list, select the required slot. 3. Locate and select the configuration file to be uploaded or type in the path and name (*.
MTM400 Configuration Files Clearing a Slot Slots can be cleared as follows: 1. From the Configuration view, select Clear Slot…. 2. From the list, highlight the slot to be deleted. 3. Select OK. The slot name is deleted from the dialog and replaced with the slot number. 4. Select Start to upload the configuration setting into the selected slot.
Scheduling Configuration schedules allow information held in configuration slots (see page 3-80) to be activated at specified times and days of the week. Schedules operate on a weekly basis. A schedule includes the following information: A schedule name. When the schedule is uploaded to the RTM device, the schedule name will be displayed in the Current Schedule field in the Configuration dialog. UTC Offset (see Scheduling and Time Zones, page 3-96).
Scheduling The schedule will be specified in a text file using XML. An example of the schedule file format is shown below: ” UTCOffset=””> = Local, or an offset from UTC time e.g.
Scheduling Scheduling Activities NOTE. If any changes are made to the configuration from the user interface, a warning message is displayed seeking confirmation of the action. Changes made may affect the configuration that is currently loaded by the scheduler. They may also affect or be affected by future scheduled configurations. Select OK to continue and accept the change made to the configuration. Select Cancel to close the message box; the intended change will revert to its previous setting.
Scheduling Uploading a Schedule A schedule file is uploaded from either the client PC or from a network location: 1. Select Upload Schedule… from the stream Configuration dialog. The Upload Schedule dialog is displayed. 2. Enter or browse the filename of the schedule file to be uploaded to the MTM400 and select Start. Select Close when the upload has finished or to terminate the process early. The schedule name will be displayed in the Current Schedule field in the Configuration dialog.
Scheduling Downloading a Schedule A schedule file is downloaded from the MTM400 to either the client PC or to a network location: 1. Select Download Schedule… from the stream Configuration dialog. The Download Schedule dialog is displayed. 2. Enter or browse to the filename of the schedule file to be downloaded from the MTM400. 3. Select Start. Select Close when the download has finished or to terminate the process early.
Scheduling Scheduling and Time Zones A schedule consists of a list of schedule items that specify the times when specific configuration slots should be loaded. The schedule attribute ‘UTC Offset’ allows the times to be interpreted in different ways, as described below. Local If you set the ‘UTC Offset’ attribute to 'Local', then the schedule times will represent the local times on the RTM device.
Scheduling Time Zones UTC to Local Time Zone Offset (MTM400 Configuration Set Time dialog) -480 minutes (8hrs before UTC) -420 minutes (7hrs before UTC) -360 minutes (6hrs before UTC) -300 minutes (5hrs before UTC) USA (Part) With Schedule 'UTC Offset' attribute set to 'Local' 13:00 schedule time = 21:00 UTC 13:00 schedule time = 20:00 UTC 13:00 schedule time = 19:00 UTC 13:00 schedule time = 18:00 UTC With Schedule 'UTC Offset' attribute set to -360 minutes 13:00 schedule time = 19:00 UTC 13:
Triggered Recording To examine offline events that occur in a stream, recordings can be made whose start is triggered by the event itself, manually, or by an alarm. The recording is held in RAM and can be downloaded from the MTM400 to the client PC for storage and further analysis. The file is stored as a valid MPEG file; however extra information is endcoded in the file to allow Tektronix MPEG analysis products to reconstruct the real-time timing artifacts present at the time of recording.
Triggered Recording Triggered Recording Settings The Settings section of the Triggered Recordings dialog is used to set up the trigger event, including the pre-trigger properties and the amount of memory to be reserved for the recording. Trigger Type The event that triggers the recording can be one of four types, selected from the drop-down list. Immediate The trigger is set as soon as Arm Trigger is selected on the Operations section; in effect, recording will start immediately.
Triggered Recording Trigger events are flagged in the Tests or Custom view by activating the Rec function associated with the event. In the following screen shot, test numbers 1.2 and 2.3a are set. With Event Alarm selected, recording will start if an error event occurs on either test. The Rec icon is toggle action; it is activated/deactivated by double-clicking it. Pre Trigger (%) A percentage of a stream can be recorded before a trigger event occurs. (See Pre-Trigger Recordings, page 3-102.
Triggered Recording Desired Recording Packets Two fields which indicate the number of packets (at 204 bytes/packets) that are to be recorded in the reserved memory (Total Memory Size) and the amount of memory that will be used. Enter the number of packets required and select Set to confirm the setting. NOTE. Any value can be entered in the Desired Record Packets field. The required memory will be calculated and displayed, even if it exceeds the available memory.
Triggered Recording The proportion of pre-trigger data may be less than specified if the trigger event occurred before enough packets were recorded in the circular buffer (particularly after clearing the buffer).
Triggered Recording Arm Trigger Use this button to set or arm the trigger event set up in the Settings panel. Stop Use this button to disarm the previously armed trigger or to stop the current recording. Any recording made up to the point when the button is pressed will be available for analysis. Record State This field indicates the current state of the Pre-trigger function. Possible states are: Idle - Pre-Trigger not armed. Waiting to Trigger - Armed and waiting for the trigger event to occur.
Triggered Recording Packets Recorded Displays the number of packets recorded and the amount of memory used. Download… Select and enter the location to which the recorded stream is to be saved. Clear Clears the current recording. Background recording (for the pretrigger) will start again immediately. MTM400 MPEG Transport Stream Monitor User Manual 3-105 Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - FAX 781.665.0780 - TestEquipmentDepot.
Interface Configuration and Interpretation This section describes the configuration and interpretation of results of the interface cards that may be installed in the MTM400. The interface settings described are as follows: QPSK (L-Band) QAM (Annex A) QAM (Annex B II) QAM (Annex C) COFDM (Coded Orthogonal Frequency Division Multiplexing) 8PSK (Phase Shift Keying) 8VSB (Vestigial Side Band) The interface card options available for the MTM400 fall into two broad categories.
Interface Configuration and Interpretation To summarize: All cards can be selected and configured using the configuration screen (use the Config button). The results and measurements of the installed card can be observed using the Input Card button. CIP card configuration, results and measurements can all be done using the Input Card button. The Input Card button on the button bar will be inactive (that is, dimmed) if an interface card is fitted, but not selected in the Configuration screen.
Interface Configuration and Interpretation QPSK (L-Band) The QPSK (L-Band) Interface option allows you to connect to QPSK equipment operating in the L-Band (950 MHz to 2150 MHz). It will internally I-Q demodulate the signal with its on-board AGC control, Viterbi decoder, and FEC decoder. The module will tune the full Satellite IF band, which is considerably wider than the L-Band itself. As LNB support is included, this allows the module to be used with a stand-alone TVRO dish.
Interface Configuration and Interpretation Configurations Allows you to select from a range of preset L-Band configurations. The configurations are made available by the MTM400 configuration file (see MTM400 Configuration Files, page 3-85.). You can activate an L-Band configuration by highlighting the name in the Configurations field; the field below will display the message ‘Updating values’ until the settings are recalled.
Interface Configuration and Interpretation Symbol Rate (MS/s) Symbol rate value in mega symbols per second. Enter the required value and select Set. Viterbi Rate Auto When enabled, the L-Band adapter automatically establishes the Viterbi Rate when acquiring Front End Lock. NOTE. The Viterbi Rate Auto option will not work correctly if the Viterbi rate is 5/6. If this rate (5/6) is known, or suspected, then the Auto option should not be used.
Interface Configuration and Interpretation Input Card Screen - QPSK (L-Band) Figure 3-39: Input card screen - QPSK (L-Band)) The constellation display in the graphing area is a representation of the digitally modulated carrier's instantaneous phase and amplitude for each transmitted symbol. A good constellation will have well-defined dot clusters in tight formations; each cluster should be centered in a grid overlay square.
Interface Configuration and Interpretation EVM (%) (Error Vector Magnitude) Closely related to, and can normally be calculated from, MER. It is a ratio of 'errored signal vectors' to maximum signal amplitude expressed as a percentage (ref: TR 101 290 Annex). BER (Bit Error Rate) Provides an indication of the Forward Error Correction workload. TEFs (Transport Error Flag or TEI transport error indicator) Indicates the Forward Error Correction failure.
Interface Configuration and Interpretation QAM (Annex A and Annex C) The QAM Annex A and Annex C interfaces have common settings. The Annex A interface appears as shown in Figure 3-40: Configuration - QAM (Annex A and Annex C) Figure 3-40: Interface configuration - QAM (Annex A and Annex C) Configurations The QAM Settings dialog provides an option to recall a number of settings configuration files. The configuration files are created and stored in the MTM400.
Interface Configuration and Interpretation Constellation Provides the option to set the modulation scheme: 4-QAM, 16-QAM, 64-QAM or 256-QAM. Select the required value from the drop-down list. Inversion The sense of modulation may be inverted due to the number of mixing stages in the installation. Enabling the Inversion checkbox will allow the demodulator to lock onto a received signal with an inverted spectrum.
Interface Configuration and Interpretation Front End Lock If full lock is acquired onto the channel and it is receiving the signal correctly, the Front End Lock (FEL) indicator will light up green. When a signal is present but no lock is achieved the indicator is red. When no signal is found, the indicator is gray. (Refer to the MTM400 MPEG Transport Stream Monitor Technical Reference for more details about the QAM interfaces.
Interface Configuration and Interpretation Clear Points Clears all points from the display grid. Readings MER (dB) (Modulation Error Ratio) Provides a single 'figure of merit' for received signal. It is the ratio of 'ideal signal vectors' to 'errored signal vectors' expressed in dB. MER is similar to a signal-to-noise measurement (ref: TR 101 290). EVM (%) (Error Vector Magnitude) Closely related to, and can normally be calculated from, MER.
Interface Configuration and Interpretation QAM (Annex B II) The QAM (Annex B II) Settings dialog box is shown in Figure 3-42. Configuration - QAM (Annex B II) Figure 3-42: Interface configuration – QAM Annex B II For each of the settings, enter the required change and select Set to apply the new value. The settings are as follows: NOTE. These settings can also be made from the Input Card screen. Configurations: The QAM Settings dialog provides an option to recall a number of settings configuration files.
Interface Configuration and Interpretation Modulation Format: This drop-down list allows 64 QAM or 256 QAM operation to be selected. Note that SCTE07 and ITU-Tj83 annex B specify exact symbol rates for the two modulation formats, so there is no dialogue box to enter the symbol rate separately. Interleaving Mode: Interleaving assists in the correction of burst noise induced errors. All interleaving modes mentioned in SCTE 07 are supported, including all Level II modes up to I = 128 J = 6.
Interface Configuration and Interpretation Input Card Screen - QAM Annex B II Figure 3-43: Input card screen - QAM Annex B II (example) Two LED indicators are available on the Readings section of the screen: FEC Lock Forward Error Correction Lock, which displays the status of the deinterleaver and Reed Solomon decoder. RF Lock If full lock is acquired onto the channel and it is receiving the signal correctly, the RF Lock indicator will light up green.
Interface Configuration and Interpretation MER and EVM calculations are performed on the constellation data according to the formulas given in ETR290-101. SNR after equalizer This graph represents the signal-to-noise ratio over time, typically over 256 seconds. It is useful for examining signal-tonoise trends; for example, if an alarm condition has been breached, the graph can be used to examine trends in the signalto-noise performance before the alarm occurred.
Interface Configuration and Interpretation COFDM The COFDM (Coded Orthogonal Frequency Division Multiplexing) Settings dialog box is shown in Figure 3-44. Configuration - COFDM Figure 3-44: COFDM interface configuration (example) For each of the settings, enter the required change and select Set to apply the new value. NOTE. These settings can also be made from the Input Card screen. Nominal Tuner Frequency: This value, set in kHz units, is the center channel frequency of the DVB-T channel to be received.
Interface Configuration and Interpretation Receiver Mode: In order to achieve high accuracy measurements, particularly for MER and SNR measurements, the COFDM IF card supports two modes of operation. For conventional COFDM reception, a relatively low ultimate SNR is acceptable. For example at 64QAM, an ultimate receiver SNR of 30 dB can result in a reduction in system performance of only 0.5 dB.
Interface Configuration and Interpretation BER (Pre-Viterbi) This indicator reads the BER in the channel, before any error correction is applied. Input Card Screen - COFDM Figure 3-45: Input card screen - COFDM (Example) Five LED indicators are available on the Readings section of the screen: Overall RF Lock: All the lock indicators are showing “in lock”, and the signal is being received normally. 3-124 TPS Lock Transmission Parameter Lock, showing true if the ruggedly modulated TPS is being received.
Interface Configuration and Interpretation The following graphs are available when the COFDM interface card is installed: RF constellation (all data carriers) When the receiver is in RF lock, the constellation points are displayed. Note that according to ETR290, only the data pilots are used for MER and EVM calculation. The samples collected are not real time, so there is some dwell (delay) before a complete constellation is displayed.
Interface Configuration and Interpretation 8VSB The 8VSB (Vestigial Sideband) Settings dialog box is shown in the following screenshot: Configuration - 8VSB Figure 3-46: 8VSB interface configuration (example) For each of the settings, enter the required change and select Set to apply the new value. NOTE. These settings can also be made from the Input Card screen. Configurations This dialog box provides an option to recall a number of settings configuration files.
Interface Configuration and Interpretation IF Spectrum This can be set to Normal or Inverse, to allow for frequency conversions in the signal chain. Conversions that use difference frequencies invert the spectrum; additive conversions do not. Channel State Available options are auto, static, dynamic and fast dynamic. Using these options you can match the receiver equalizer to the expected channel conditions. The recommended default setting is auto.
Interface Configuration and Interpretation Input Card Screen - 8VSB One LED indicator is available in the Readings section of the screen: RF Lock This indicates that all decoding systems are in lock and the signal is being decoded normally. The following graphs are available when the 8VSB interface card is installed: Figure 3-47: Input card screen - 8VSB (Example) Symbol Distribution This graph shows the samples received over time in a falling vertical line display.
Interface Configuration and Interpretation Equalizer The equalizer coefficients are plotted across the graph display. The display illustrates the presence of multi-path echoes by indicating how the equalizer is adjusting to cancel them out. NOTE. The Equalizer graph amplitude values are only approximate. Equivalent MER An MER (Modulation Error Ratio) calculation is performed on the in-phase (I) data samples. The quadrature data samples are ignored in this calculation.
Interface Configuration and Interpretation Configurations: This dialog box provides an option to recall a number of settings configuration files; for example, prestored transponder parameters. The configuration files are created and stored in the MTM400. To select a configuration file, highlight the required name in the list. Tuner Frequency (kHz): This value is the center frequency of the IF channel to be received (that is, after downconversion in the LNB where applicable).
Interface Configuration and Interpretation Input Card Screen - 8PSK The following LES indicators are available in the Readings section of the screen: RF Lock Indicates when the RF reciver sections are in lock and receiving normally. FEC Lock Indicates when the Forward Error correction ( DVB or turbo coded) is in lock and the data is being processed to give Transport Streams.
Interface Configuration and Interpretation SMPTE310 Settings There are no user settings associated with the SMPTE (Society of Motion Picture and Television Engineers) interface. (Refer to the MTM400 MPEG Transport Stream Monitor Technical Reference for more details about the SMPTE interface.) ASI Settings There are no user settings associated with the ASI (Asynchronous Serial Interface) interface.
Appendices
Appendix A: Network Installation A major feature of the MTM400 MPEG Transport Stream Monitor is its versatility with respect to configuration. Although always operating within a client-server architecture, the following configuration options are available: The MTM400 can be left unattended. In this setup, the front panel LEDs and any configured external alarms will indicate monitoring test failures.
Appendix A: Network Installation The WebMSM software is installed on a client PC and allows the user to monitor and control the MTM400. The WebMSM can be used to monitor all compatible devices on a network (if the appropriate license is held). The Remote User Interface (RUI) software, based on the WebMSM, is downloaded and accessed from the MTM400 using a browser (Microsoft Internet Explorer with Microsoft Virtual Machine installed) of any networked personal computer.
Appendix A: Network Installation IP Address An IP address is assigned to each unit and acts as a unique identifier within a network. An IP address will be assigned by the Network Administrator. IP addresses are written as four groups of up to three digits each separated by periods, for example, '119.183.115.11'. The IP address must be associated with a MAC address for the unit to be able to function within a network. New units are shipped with the IP address set to 0.0.0.
Appendix A: Network Installation Resetting the IP Address using the User Interface With the unit powered up and connected to the network in which its current IP address is recognized: 1. Open the user interface, logging on as Administrator. 2. From the Device view Configuration dialog, select Network Settings…. The Network Settings dialog box is displayed. 3. A-4 When the values have been changed as required, select the adjacent Set button to store the new settings in the MTM400.
Appendix A: Network Installation If necessary, obtain the Gateway and Subnet Mask values from the Network Administrator. 4. When the settings have been changed and set and Close is selected, the following dialog is displayed: Select OK to restart the device and for the settings to take effect. Select Cancel if a restart is not required (the settings will take effect the next time that the unit is restarted). The unit will be restarted, but the current network will not be able to communicate with it.
Appendix A: Network Installation Removing the Cover The unit cover is held in position by 21 x T10 Torx screws. 1. Remove and retain the 21 cover retaining screws. 2. Lift the cover from the unit. Resetting the Non-Volatile RAM Locate and press the Non-Volatile RAM Reset switch (SW111). This action resets the non-volatile RAM and clears the current configuration. As part of this action, the IP address is reset to 0.0.0.0. NOTE.
Appendix A: Network Installation Replacing the Cover 1. Before replacing the cover, ensure that all components are in place and that all connections are secure. 2. Replace the 21 cover retaining screws and ensure that they are uniformly tightened. Proceed with setting up the required IP address. Network Set-Up Setting up requires MS DOS on a client PC, with both the MTM400 and the client PC powered up and attached to the same Ethernet network.
Appendix A: Network Installation The IP set-up is now complete. Close the MS-DOS window. With the IP Address successfully set up, the network settings can be completed (refer to Resetting the IP Address using the User Interface, page A-4). The ARP command cannot be used if the unit already has an IP address - it will only work if the IP is 0.0.0.0. (Refer to Resetting the IP Address to Factory Default, page A-5 if the IP address is to be reset.
Appendix B: Maintenance This appendix describes some general care and service procedures for the MTM400 MPEG Transport Stream Monitor and includes the following subsections: Preventive Maintenance provides cleaning instructions. Rack Mounting provides instructions for installing the unit in a 19-inch equipment rack. Preventative Maintenance Protect the unit from adverse weather conditions. The unit is not waterproof. CAUTION.
Appendix B: Maintenance Rack Mounting CAUTION. Efficient cooling will be maintained in a rack-mounted unit if the air temperature at all intake air vents (inside the rack) does not exceed 40 ºC. WARNING. To avoid fire hazard, the MTM400 must be installed in the rack only as specified, and proper ventilation must be maintained. The MTM400 can be mounted in a standard 19-inch equipment rack.
Appendix B: Maintenance Figure B-2: Rack mounted sections The chassis section is already installed on the unit. The position of the rear rack mounting can be adjusted to suit the depth of the rack. Approximately six inches of clearance is required between the rear panel of the unit and any rear cabinet panel to allow for connector space and adequate air circulation. Installing the MTM400 Unit Refer to Figure B-3 to install the unit in the rack. 1.
Appendix B: Maintenance Removing the MTM400 Unit Refer to Figure B-3 to remove the unit from the rack. 1. Loosen the front panel retaining screw and pull the unit out until the stop latches snap into the holes. 2. Press the stop latches and remove the unit. When removing the unit from the rack, be sure to disconnect all cabling. Figure B-3: Installing or removing the rack slides Rack Adjustments After installation, if the slide tracks are not properly adjusted, they may bind.
Glossary
Glossary Program and Service: In this manual the terms program and service are interchangeable.
Glossary NIT Network Information Table PAT Program Association Table PCI Peripheral Component Interconnect PCR Program Clock Reference PID Packet Identifier PMT Program Map Table PSIP Program and System Information Protocol (ATSC) PTS Presentation Time Stamp QAM Quadrature Amplitude Modulation QPSK Quaternary Phase-Shift Keying (also known as Quadrature Phase-Shift Keying) RRT Rating Region Table RTM Real-Time Monitor RUI Remote User Interface SDT Service Description Table SI S
Index
Index DVB Region, 3-78 Factory Default, 3-80 Interface, 3-79 Maintenance Mode, 3-80 Scheduling, 3-80 Standard, 3-77 Stream Name, 3-79 Stream view, 3-76 Template Checking, 3-79 Virtual Channel Table Mode, 3-79 8 8PSK, 3-129 8VSB, 3-126 A alarms, 3-24, 3-28 B Custom screen bit rate Stream view, 3-26 Programs screen, 3-32 bit rate limits PID Groups screen, 3-47 PIDs screen, 3-37 Programs screen, 3-32 D Device view config, 3-6 Info, 3-15 Log, 3-4 overview, 2-5, 3-1 Status, 3-2 buttons colors, 2-11 C
Index installation electrical, 1-9 hardware, 1-8 network, 1-11 N Network installation, A-1 latency, A-8 naming, A-8 interface 8PSK, 3-129 8VSB, 3-126 COFDM, 3-122 configuration, 3-107 interpretation, 3-107 L-Band, 3-109 QAM (Annex A), 3-114 QAM (Annex B), 3-118 QAM (Annex C), 3-114 QPSK (L-Band), 3-109 Interface selection, 3-79 ISDB font extensions, 1-12 ISDB-T Information Packet, 3-79 L L-Band, 3-109 LED ETHERNET, 2-2 STATUS, 2-2 SYNC, 2-2 SYSTEM, 2-2 Log Device view, 3-4 Log screen clear, 3-74 log
Index Programs screen view selection, 3-63 Stream view, 3-62 update, 3-62 bit rate, 3-32 PTS Arrival graph, 3-55 SNMP Q traps, 3-3, 3-24 QAM (Annex A), 3-114 QAM (Annex B), 3-118 QAM (Annex C), 3-114 QPSK (L-Band), 3-109 Standard, 3-77 Status Device view, 3-2 Stream Name selection, 3-79 Stream view Configuration screen, 3-76 Custom screen, 3-26 Log screen, 3-72 overview, 2-6 PCR screen, 3-48 PID Groups screen, 3-41 PIDs screen, 3-34 Programs screen, 3-30 SFN screen, 3-56 SI Graphs screen, 3-58 SI
Index Triggered Recording, 3-99 operation, 3-103 pre-trigger, 3-102 set, 3-25 set up, 3-100 V version user interface display, 2-12 view combined, 2-9 multiple, 2-10 TTL output, 3-24 U Virtual Channel Table Mode selection, 3-79 User PIDs add, 3-39 delete, 3-39 Programs screen, 3-38 Index-4 W WebMSM, See WebMSM User Manual 071-1239-xx overview, 2-12 MTM400 MPEG Transport Stream Monitor User Manual Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - FAX 781.665.
