Tektronix AD954 DATASHEET
Features & Benefits
Supports MPEG-2/DVB/ATSC
Transport Streams Which
Enables Testing to be
Performed Anywhere
in the World
Real Time Monitoring of
Key Parameters Gives
an Immediate Indication
of Major Problems
Detailed Off Line Transport
Stream Analysis Enables
Full In-depth Analysis of
the Transport Stream
Transport Stream Capture
and Triggered Recording
Provides the Capability to
Send Streams Back to Base
ASI, SMPTE 310M, DVB
Parallel Interfaces for
Connection Anywhere
in an MPEG-2 Network
Small, Light and Portable
Low Power Consumption
Applications
Installation and
Commissioning of DVB/ATSC
Transmission Chains
Testing and Debug
of MPEG-2 Broadcast
Equipment
MPEG Portable Analyzer
AD954
Overview
The AD954 is a small,portable unit with
enough power to debug MPEG-2 systems
in the field. It interfaces with the Engineer’s
laptop computer running AD954 software to
create a cost effective and simple analysis
tool for use on the move.
The AD954 is designed for engineers who
work in the field on compression equipment
installation and service. For them it provides
instant real-time analysis and recording as
well as off-line analysis at the transport
stream level.The AD954 works with the
engineer’s own laptop on which status information is provided by clear graphical displays.
The result is simple, in-the-field diagnosis
and quality assurance.
MPEG Test • www.tektronix.com/video_audio
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MPEG Portable Analyzer
AD954
Features
Real Time Monitoring
The AD954 performs real time monitoring
of MPEG-2, DVB and ATSC transport streams.
This gives “live”stream compliance status
and highlights errant stream behavior.
DVB Testing
AD954 provides real time monitoring of all
the DVB defined first priority measurements*
1
.
It also gives status of the transport error
indicator and detects unreferenced PIDs
A real time view of the SI tables is provided
ATSC Testing
In addition to the basic transport stream tests
a real time view of the PSIP table is provided
PID Bit Rate Testing
User selected PIDs may be tested to check
whether their bit rate remains constant for a
period of greater than 1 second.The multiplex
occupancy is tested against user definable limits on either a per PID or per program basis.
Installation engineers can thereby confirm that
statistical multiplexers are functioning correctly
Recording
AD954 can record up to 15 seconds of data
at bit rates of 90 Mb/s
Recording is initiated direct from the
user interface
Captured files can be examined in the field
using Stream Analyzer software or sent back
to research and development engineers for
further analysis
Triggered Recording
Recording can be triggered by a change in
state of any one of the measurements made
by the AD954,as defined by the user
The trigger point can be defined to be any
point in the recorded file
Trigger settings can be maintained
between sessions
Off Line Analysis
AD954 is supplied with Stream Analyzer
software, providing:
Packet Display and Analysis
Transport stream packet header interpretation
Adaptation field information for
individual packets
Hexadecimal representation of transport stream
packet header and payload information
Location of a transport stream packet to match
a particular condition in the packet header
Timing and Statistical Displays
Statistical display of the components of
the transport stream and their data rates
on a program oriented basis
Calculation and graphical display of the
instantaneous and mean bit rate for each
PID and for the entire transport stream from
PCR time stamp values
Calculation and graphical display of
PCR information:
– Repetition interval between successive
PCRs on a PID by PID basis
– Inaccuracy of each PCR on a PID by
PID basis
Display of MPEG-2 tables, DVB tables,
Enhanced DVB SI and ATSC PSIP tables
*1Ref: European Telecommunications Standards Institute,
TR101290: Digital Video Broadcasting (DVB); Measurement
Guidelines for DVB systems.
MPEG Test • www.tektronix.com/video_audio
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