Nevion FRS-HD-XMUX4 - Manual (Page 23)

FRS-HD-XMUX4 Rev. C
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audio based on the delay setting for video and audio. This is useful if the SDI-in and
AES has a common clock source and the sync input has a different clock source
5.14.2 Audio outputs
The AES outputs are routed from the audio matrix via individual audio processing
blocks. The outputs are always 48 kHz and synchronous to the system clock. The AES
outputs have individual fallback options, see chapter 5.13.
5.15 Audio generator
The stereo audio generator is available in the audio cross point matrix as a source. It is
a high purity 1 kHz sine wave with a 250ms interruption on the left channel every 3
seconds. The audio level may be set to one of two standards. The two levels are -18
dBFS and -20 dBFS. These two levels correspond to EBU R68 and SMPTE RP 155.
5.16 Audio processing block
The output of each stereo signal from the audio cross point matrix may be processed in
the audio processing block. This is controlled with the Multicon GYDA controller. The
processing includes channel L/R manipulation and audio gain.
Figure 17: The figure shows the Multicon GYDA configuration view of the audio
processing block
Channel L/R manipulation
The stereo signals may be output in one of the following ways:
- LR, Left / Right No change.
- RL, Right/ Left Channels are swapped.
- LL, Left/ Left Left channel is copied into the right channel.
- RR, Right/ Right Right channel is copied into the left channel.
- nLR, ØLeft/ Right The left channel is phase inverted.
- LnR, Left/ ØRight The right channel is phase inverted.
- MM, (Left + Right)/2 The left and right channels are summed.
- MS, MS/AB The left and right channels are converted from AB stereo
to MS stereo.