Ross OpenGear HDC-8223A, Руководство пользователя

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4–10 • Operation HDC-8223A(-S) User Manual (Iss. 03)
Output Audio Routing Controls
The Output Audio Routing feature includes the following options in DashBoard:
• Embedded Output — This sub-tab provides an audio crosspoint allowing the audio
source selection for each embedded audio output channel. This sub-tab also provides
gain, phase invert, muting controls, and peak level meters for each output channel.
• Analog Output — This sub-tab provides an audio crosspoint allowing the audio source
selection for each analog audio output channel. This sub-tab also provides gain, phase
invert, and muting controls, and peak level meters for each output channel.
• Downmixer — This sub-tab provides audio down-mix audio routing selections that
multiplexes any five embedded audio channel sources into a stereo pair.
• Audio Delay — This sub-tab provides a bulk audio delay control.
For each channel, its source and destination should be considered and appropriately set. Unused
destination channels should be set to the Silence selection.
Group/Enable Disable Controls
Changing the setting of this control will result in a noise burst in all groups. This control should
not be manipulated when carrying on-air content.
Selecting the Embedded output channel source
Using the source drop-down list, selects the audio input source to be embedded in the
corresponding embedded output channel from the choices in
Table 5.13 on page 5-17.
Channel Mute, Invert, and Gain Controls
Provides mute and phase invert channel controls as well as peak level meter for each output
channel. Meter shows level as affected by level control.
Center Mix Ratio Control
The default setting is recommended to maintain center-channel predominance in downmix
representative to that of the original source 5-channel mix.
The -0dB setting applies no ratiometric reduction. Center channel content is restored as in-phase
center-channel content with no attenuation, making center-channel content more predominate in
the overall mix.
The maximum attenuation setting (-80dB) applies a -80dB ratiometric reduction of
center-channel content. Center-channel content is restored as in-phase center-channel content at a
-80dB ratio relative to overall level, making center-channel content less predominate in the
overall mix.
Surround Mix Ratio Control
The default setting is recommended to maintain center-channel predominance in downmix
representative to that of the original source 5-channel mix.
The -0 dB setting applies no ratiometric reduction. Surround-channel content is restored with no
attenuation, making Lo and Ro content more predominate in the overall mix.
Note
— Although the HDC-8223A(-S) can pass non-PCM data, such as Dolby® E® or AC-3,
setting the gain control to any setting other than default 0 will corrupt Dolby® data.