DWC-HD
Rev.
2
select it in the matrix directly, select it as the first priority under audio fallback, or to set it as
second priority behind a missing input.
The generator signal 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
RP155.
3.18 Audio processing block
The output of each stereo signal from the audio cross point matrix may be manipulated in the
audio processing block (LL, RR, LR, RL ØLR, LØR, L+R/2, MS).
The stereo signals may be output in one of the following ways:
-
LR, Left / Right
Normal operation, no change.
-
RL, Right/ Left
Channels are swapped with each other.
-
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
Both channels replaced with the mean of left and right.
-
MS, MS/AB
Conversion from AB stereo to MS stereo.
3.19 Audio embedder
The audio embedder can be enabled/disabled per group. When a group to be embedded is
disabled the audio inside that group is removed.
A 24-bit audio signal uses the Extended Audio Data Packet for the 4 least significant bits. Not
all equipment can handle Extended Audio Data Packets correctly, so the option exists to
truncate all audio data to 20 bits.
This setting is common for all embedder channels.
The insertion of Audio Control Packages can also be switched on and off.
This setting is
also common for all embedder channels.
For SD input (i.e. operation as a frame synchronizer) the audio embedder can also be
switched off all together. In this state all audio embedded on the input signal is left
unchanged.
3.20 Analog audio output
The level of the analog audio output can be adjusted in GYDA. The minimum step is 0.5dB
(input will be rounded to nearest 0.5dB) and the range is from -95.5dBu to 24dBu. It is also
possible to mute the output completely.
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