Service manual

2
The S
TELLAR
MPEG-2 Decoder
1
Introduction
◆
The S
TELLAR
MPEG-2 Decoder
General description The S
TELLAR
MPEG-2 Decoder is intended for professional decoding of a single
program comprising one video signal with up to two stereo audio channels. Programs
can be decoded according to MP@ML or 4:2:2P@ML.
The S
TELLAR
can be set up and configured individually for specific professional con-
tribution and distribution applications. The unit can be equipped with modules for
the:
• network input (E1, E3 and DS3)
• Transport Stream (TS) input (ASI, SPI or V.35 input)
• TS output (ASI restamping output).
• SMPTE 310M output
• audio output (analog audio, digital AES/EBU audio output, audio embedded in the
SDI signal)
• video output (PAL, PAL M, NTSC and SDI output)
The S
TELLAR
will be equipped with the options you have ordered for your unit. This
manual describes all available options of the S
TELLAR
.
The design of the S
TELLAR
is compact; the unit features one-channel video process-
ing in a 1 U sub-rack with a depth less than 380 mm (15"). The S
TELLAR
is intended
for mounting in a standard 19" rack. Because of the low power consumption of the
unit, no external ventilation is necessary.
When stacking several units on top of each other, air separation plates must be
mounted. For details on how to do, see Installing the Stellar, p. 16.
With the ROSA Device Configuration Shell you configure the unit and set all the
necessary parameters. ROSA enables full control and monitoring functionality of the
S
TELLAR
with redundancy switching, error reporting and remote control. For use of
ROSA together with the S
TELLAR
,seeSetup and monitoring, p. 61.
The S
TELLAR
can be delivered with an optional front panel user interface.
TS/Network input The S
TELLAR
can be configured to accept one of the following TS/network input sig-
nals:
• E1, E3 or DS3 data signal
• DVB compliant transport stream ASI, SPI or V.35
For redundancy reasons there are two inputs for the network
Output signals The transport stream is demultiplexed and one user-specified program is decoded and
presented as output. The video signal is recovered and VBI signals are added before
being output. The S
TELLAR
has a single (optionally a double) stereo audio output pro-
viding analog balanced or digital AES/EBU outputs. Auxiliary data are output as RS-
232 and RS-422 data output.
The optional ASI restamping output can used for converting G.703 network inputs to
ASI formats used by external equipment such as a DVB-C modulator.