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MTS200 Series
MPEG Test Systems
MTS Version 2.2/RTA Version 1.0
Serial Number B080000 and Later
071-0079-01
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TEKTRONIX and TEK are registered trademarks of T ektronix, Inc.
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This manual describes changes to the MTS 200 Series MPEG Test System that
are not documented in other manuals provided with your system. Information in
this manual supersedes that in all other test system documentation. This manual
contains the following sections:
Products Covered by this Manual
New Features and Improvements
Performance Issues
MPEG-2 Transport Stream Error Injector
Products Covered by this Manual
The changes noted in this document apply to MTS 200 Series MPEG Test
System Application Software version 2.2.
Table 1 lists the affected versions of the MTS200 Series applications; select the
About command on the Help (or ?) menu to see the version of the current
application.
T able 1: MTS200 Series software program versions
Icon name Program Version Date
Analyzer
Data Store Administrator
DVB Channel Coding and Decoding
Error Injector
Multiplexer
ББББББББ
Packet Jitter
Table Editor
Real-Time Analyzer
Adn_carb.exe
Matracom.exe
Canal.exe
Einjwin.exe
Mux_carb.exe
ÁÁÁ
Gigue.exe
Editable.exe
Rta.exe
2.12.06
2.21.6
N/A
1.01
2.01.12
ÁÁ
2.00.03
2.02.00
1.18
October 1997
N/A
N/A
N/A
September 1997
ББББББ
July 1996
March 1997
November 1997
MTS 200 Series MPEG Test Systems
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New Features and Improvements
Several changes have been made to the MTS 200 Series that add new capabilities, improve performance, or affect required procedures.
Version 2.2 Software
Enhancements
Version 2.2 Software
Improvements
This version of the software adds the following new features:
H The MTS 205 and MTS215 Real-Time Analyzers have been added to the
product line.
H A newer Beta version of a new Error Injector application is included with
this release. See MPEG-2 Transport Stream Error Injector on page 7 for
more information.
Version 2.2 fixes the following deficiencies in the Version 2.1 software release:
H Automatic analysis of certain transport streams causes Analyzer to crash.
Certain transport streams with erroneous table contents would cause the
Analyzer to crash.
H Multiplexer didn’t permit insertion of RST.
H Table Editor didn’t allow editing of RST.
H Multiplexer didn’t permit zero-PES-packet size on certain high-bitrate
streams.
H More PIDs are now permitted in the Analyzer.
Proliant 1600 Platform
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The PC platform for this Test System is the Compaq Proliant 1600, not the
Proliant 2500 as stated in the user documentation. The Proliant 1600 contains the
following enhancements and changes from previous platforms:
H 266 MHz PentiumR II processor
H 64 Mbytes RAM
H The PC rests on four foot-pads rather than a pedestal. The foot-pads are
removed for shipping; install them or the optional rack-mount kit before
operating the Test System.
H The physical locations of the rear-panel SCSI, RJ-45, AUI, and built-in
video connectors have changed from the Proliant 2500. These connectors are
clearly marked and easily identified; if necessary, see the Compaq documentation for more information. Note that built-in video is disabled in the MPEG
Test Systems. Connect the monitor to the video card that is installed in
expansion slot number 6.
MTS 200 Series MPEG Test Systems
Performance Issues
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The expansion slot configuration of the Proliant 1600 is identical to the Proliant
2500. In the unlikely event that reinstallation of MPEG Test System hardware or
software becomes necessary, always follow instructions for the Proliant 2500
platform in steps in which a distinction is made between the Proliant and
Prosignia 500 platforms.
As sometimes occurs with new products, the MTS 200 Series does not meet a
limited number of its performance criteria. These are listed below. Software
items include a reference number, the executable module, and a brief description.
Reference N/A, Executable RTA (Real-Time Analyzer)
When using the deferred-time Analyzer to examine a partial, filtered, transport
stream captured with the RTA, timing analysis is not advised for the following
reasons:
The deferred-time Analyzer cannot compute the bit rate if the first PMT
declared in the PAT has no PCR information, which occurs when the
corresponding PID has been filtered by the Real-Time Analyzer.
Even if you input the correct overall bit rate, all information related to timing
(PCR, PTS/DTS, section rates, and dynamic analyses) can be incorrect
because the time distribution of the packets repartition is lost when filtered
data is captured. PCRs, for example, will be incorrect because they are
computed at the source on the complete stream, not on a filtered part of it.
If you intend to perform in-depth timing analysis of a captured stream, always
select No filtering mechanism on the Data Storage Configuration tab of the
RTA Settings window.
Reference N/A, Executable ADN_CARB (Analyzer)
CRC, Syntax, and PCR check only the levels selected, not the whole stream.
Reference N/A, Executable MATRACOM (Data Store Administrator)
There are limitations when generating a stream from the looping partition. The
partition is divided into two sections, “first valid window” and “second valid
window,” which are demarcated by the “offset” value. The value of “offset” is
based on where the acquisition was terminated. If the partition is, for example,
10 Mbytes, and the offset is 7.5 Mbytes, then the valid windows will be
7.5 Mbytes and 2.5 Mbytes, or “0 to 7864320 bytes or 7864321 to 10485759
bytes.”
MTS 200 Series MPEG Test Systems
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A generated stream from the looping partition cannot span the offset point, nor
can it cross the ends of the partition. Therefore, you can only generate from the
beginning of the file to the offset point. The loop partition is mostly useful for
acquisition.
Reference 3373, Executable ADN_CARB (Analyzer)
When displaying a large font, some characters are displayed badly (or not at all)
in the packet views. Use a smaller font.
Reference 3392, Executable ADN_CARB (Analyzer)
The hexadecimal display of large packets (PES) does not page-down with the
scroll bar; it only moves one line at a time. Use the thumbnail box to scroll by
dragging the thumbnail box up or down.
Reference 4155, Executable ADONUM, MUX_CARB (Analyzer, Multiplexer)
Immediately after exiting either the Analyzer or Multiplexer, you cannot restart
either the Analyzer or Multiplexer for a short period of time. This is because
Windows NT must finish unloading the library, CARBFILE.DLL, before loading
it again. When this is finished, the application can be loaded as normal. Wait a
short time and restart your selected application.
Reference 3446, Executable ADN_CARB (Analyzer)
While analyzing large transport stream files, the analyzer can appear to be busy
with no indication of progress. Note that analysis of large transport stream files
can take many minutes.
Reference 3479, Executable MATRACOM (Data Store Administrator)
During ECL serial slave generation, when the master uses just one stuffing byte,
the generation does not terminate if the file sizes match. The transfer percentage
reaches 100% and generation continues. Generation will terminate properly if the
master uses no stuffing bytes or from 2 to 16 stuffing bytes.
Reference 3491, Executable MUX_CARB (Multiplexer)
When running the Multiplexer, it is possible to select the data store drives as
target directory for the configuration files (*.Cfg). While possible, it is not
recommended, because any later attempt to generate a multiplex will fail because
simultaneous read/write access to the Data Store drives is not possible. Avoid
storing multiplex configuration files on the data store drives.
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MTS 200 Series MPEG Test Systems
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Reference N/A, Executable ADN_CARB (Analyzer)
PCR Analysis uses the previous PCR as the reference point when calculating the
error in the current PCR. This method can result in misleading error calculations
for some PCR jitter functions. Specifically, jitter added by the MTS 200 Series
Jitter Adder may not be easily interpreted by the PCR analysis display.
Reference 8669, Executable ADN_CARB (Analyzer)
The Analyzer application reports errors in a window that allows a maximum
1000 errors. In transport streams with many (more than 1000) errors, later errors
may not be detected because the application stops reporting errors at this limit.
Re-acquire the stream past the point of the numerous errors or don’t analyze the
portion of the stream with so many errors.
Reference 8670, Executable ADN_CARB (Analyzer)
The Analyzer reports errors in a window that allows a maximum of 1000
reported errors. In transport streams with many (more than 1000) errors, later
errors may not be detected because the application stops reporting and logging
errors at this limit. The application notes this as it stops logging errors; however,
the notice that it has stopped logging errors is not written to the on-disk logfile.
Please note that if there are 1000 errors in the logfile, there may be additional
errors present in the transport stream.
Reference 14185, Executable ADN_CARB (Analyzer)
Closing a Hierarchic view in the Analyzer application causes a later Automatic
Analysis to fail with a General Protection Fault. Please do not close the
Hierarchic view prior to performing automatic analysis.
Reference 15160, 15158, 15162, Executable RTA (Real-Time Analyzer)
Rarely, while the RTA is rapidly updating the Hierarchic view, the application
may exit with an Application Error or Exception Access Violation when a
mouse-click is performed somewhere in the Hierarchic view. There is no known
way to avoid this, but restarting the application will restart the analysis.
Reference 15444, Executable RTA (Real-Time Analyzer)
If the application quits with an Exception Access Violation or Application Error
during Data Store acquisition (recording to the Data Store disks), the RTA will
not permit future acquisitions, even if the application is stopped and restarted.
The system must be rebooted (shut down and restarted) to continue analysis.
MTS 200 Series MPEG Test Systems
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Reference 15282, Executable MATRACOM (Data Store Analyzer)
If the File Allocation Table on the Data Store drives becomes corrupted, the Data
Store Administrator will present a PC File generation dialog box upon generation selection, instead of the familiar Generation dialog box. This only occurs if
you select the Generation (G) command button from the tool bar; this does not
occur if you right-click on the name of the file you wish to generate and select
Generation from the resulting shortcut menu. If you see the PC File generation
dialog box, simply select generation from the shortcut menu; however, you
should repartition the Data Store drives at your first opportunity. BE AWARE
THAT REPARITIONING THE DATA STORE DRIVES WILL ERASE ALL
YOUR FILES!
Reference 14965, Executable RTA (Real-Time Analyzer)
To effect pass-through of the signal from input to output on the RTA, you must
click the Data Store Start toolbar command button, or select Start from the
Data Storage menu. A dialog box appears warning you that the application is
unable to start the data store subsystem, and subsequent messages may warn of
missing the data store subsystem. These messages may be safely ignored.
Reference N/A, RTA User Manual
The description of the LVDS output common mode voltage in Table A–3 of the
Real-Time Analyzer User Manual is incorrect. The correct description is 0.85 V,
typical.
Reference N/A, Executable SETUP (MTS Setup Program)
During software reinstallation, the Setup program requires the user to specify the
expansion slot(s) in which the MPEG Test System hardware is installed. For
each board, the program offers one choice for Proliant 2500 platforms and one
choice for Prosignia 500 platforms. The Proliant 1600 expansion slot configuration is the same as in the Proliant 2500; always select the “Slot n-Proliant 2500
Platforms” option when running the Setup program. You will be unable to use
the associated MPEG Test System application(s) if you do not select the correct
slot option.
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MTS 200 Series MPEG Test Systems
MPEG-2 Transport Stream Error Injector
The MTS 200 Series MPEG Test System version 2.2 includes an improved Error
Injector application. With the Error Injector, you can introduce errors into an
MPEG-2 transport stream and use the erroneous stream to stress-test MPEG-2
systems and components.
The Error Injector reads the input transport stream file, modifies selected
transport packets according to instructions in a user-defined configuration file,
and writes the modified stream into another file.
To start the Error Injector, select it from the Tektronix MPEG Test System
program group.
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For more information about the application and how to use it, refer to the online
help available through the Error Injector Help menu.
MTS 200 Series MPEG Test Systems
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MTS 200 Series MPEG Test Systems
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