Albalá Ingenieros DDF2008C01, Manual

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Albalá Ingenieros | Manual DDF2008C01
The DDF2008C01 can be configured to provide eight AES/EBU inputs, four AES/EBU
inputs and four outputs or eight AES/EBU outputs.
4.3. The AES/EBU inputs
The AES/EBU inputs of the DDF2008C01 can be IN1 to IN8, IN1 to IN4 or IN5 to IN8
depending upon the selected configuration.
In order for the DDF2008C01 to function properly the sampling frequency of the
AES/EBU audio streams received must be 48kHz and must be synchronized to the
internal sampling frequency of the module. Therefore the DDF2008C01 modules that
deliver the signal streams must be provided with a proper reference signal.
The DDF2008C01 includes detection of signal presence and signal sync for each input.
The presence detector includes format validation as per EBU Tech. 3250-E with or
without parity verification. The sync detector allows verification that the sampling
frequency of the streams being received is synchronized to the internal sampling
frequency of the module.
The streams inserted into the AUDIOCHAIN bus are continuous even if AES/EBU signals
received are not synchronized. In order to achieve this audio samples may be deleted or
duplicated before insertion and the status channel of the AES/EBU remains intact.
The DDF2008C01 has two operating modes when the input signal is absent: it can stop
inserting the audio stream into the AUDIOCHAIN or, by default, it can generate and
insert a stream containing silence.
The two AES/EBU input stream channels can be connected to any of the 16 channels in
the AUDIOCHAIN independently and in either direction.
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