Atec Tektronix-SV970 - Manual (Page 2)

MPEG Transport Stream Monitor
SV970
SV970 Transport Stream Monitor provides
continuous real-time monitoring of a DVB
transport stream performing DVB first, second
and third priority measurements with user
defined error limits.
Our experience of transmission monitoring has
shown that simply monitoring the parameters
defined in the DVB Measurement Guidelines
TR 101 290 is not enough to guarantee that
a viewer’s decoder will successfully present a
picture on their television. All that TR 101 290
will guarantee is that a transport stream is
basically syntactically correct, but if a program
is not being broadcast or signaled in the SI
it will not report an error.
The purpose behind template checking is to
fill in the monitoring gap left by TR 101 290.
A template enables the broadcaster to define
certain Transport Stream properties such as
the number of programs within a multiplex,
the value of the transport_stream_id, etc. The
SV970 Transport Stream Monitor unit extracts
these values from the transport stream which
it is monitoring and checks that they match
the template defined by the broadcaster. Using
template tests, the broadcaster can be certain
that the correct transport stream is being
broadcast and that it is complete.
Designed to integrate seamlessly into a broad-
cast environment with local display from the
front panel, or remote control using industry
standard SNMP via Ethernet the SV970
Transport Stream Monitor is supplied ready
to mount into a 19" rack.
Real Time Measurements
SV970 Transport Stream Monitor performs all
of the DVB and ETSI recommended 1st, 2nd,
and 3rd priority measurements as specified
in Measurement Guidelines for DVB Systems
TR 101 290* 1 . This ensures that the transport
stream is present and compliant with the DVB,
MPEG-2 standards.
SV970 Transport Stream Monitor also monitors
program bit rate against user defined limits,
providing early indication of multiplexer mal-
functions or infringement of minimum bit-rate
limits for statistically multiplexed streams.
Remote Monitoring
and Control
For broadcasters requiring a fully integrated
monitoring tool, SV970 Transport Stream
Monitor is the solution; providing full remote
control and monitoring via Ethernet using
either Microsoft Windows NT or Simple
Network Management Protocol (SNMP).
Multiple SV970 Transport Stream Monitor
can be linked to the global control network.
The status of the broadcast chain can be
checked by simply connecting to the monitor-
ing network using a PC with a web browser.
For applications where networking and remote
control is not required SV970 Transport
Stream Monitor can be used stand-alone.
Front panel LED indicators provide transport
stream error status at a glance.
Error Logging
With SV970, each stream has its own dedicat-
ed error log providing a history of the status of
each transport stream.
Alarms
SV970 Transport Stream Monitor provides both
remote and local error alarms for each moni-
tored transport stream. Remote alarms are
provided by the remote control protocol with
local alarm outputs as TTL and closed contact
relay alarm outputs.
All alarms are user configurable, and can be
used to trigger other equipment like the
Tektronix AD953-II which can record the
transport stream or to drive other equipment
like audible alarms which can alert operatives
to error conditions.
Transport Stream Interfaces
SV970 Transport Stream Monitor has been
designed to integrate into a transmission
environment and supports all of the following
transport stream interfaces:
DVB Parallel Interface (SPI)
DVB ASI
L-Band, QPSK
DHEI
* 1 With the exception of T-STD buffer model analysis.
MPEG Monitoring • www.tektronix.com/video_audio 2