Service manual

Audio and data interfaces
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Audio and data interfaces
Audio output modules The S
TELLAR
has as standard one analog stereo or digital AES/EBU output. The ana-
log output provides a balanced output signal.
As an option the following output module can be installed:
• one additional analog stereo or digital AES/EBU output.
Both audio channels which are to be decoded must be part of the same program.
Analog/digital/
embedded audio output
Audio is output as digital or analog signals and at the same time audio can be embed-
ded in the SDI signal. The audio bandwidth is determined by the selected audio sam-
ple frequency in the MPEG-2 Video Encoder. The connector for digital audio output
is marked AES/EBU. The optional secondary audio channel may also be analog or
digital AES/EBU.
The audio channels are decoded as stereo, joint stereo, dual mono or mono as sig-
nalled in the audio bit streams.
The analog output interface is balanced with the option for either 600 Ω or < 20 Ω
output impedance. In the user interface you can set the maximum output level of the
analog output from -6 to + 24 dBu (< 20 Ω)and-6to+21dBm(600Ω).
Audio formats The audio decoding format is MPEG-1 layer II or 20 bit linear audio.
RS-232/RS-422
auxiliary data
The S
TELLAR
supports decoding of an asynchronous transparent data channel with a
baud rate of up to 38400.
Nx64kbit/sdata The S
TELLAR
supports decoding of decoding of a synchronous N x 64 kbit/s data
channel (N is one to six).