Wohler AMP1-S8DA, Руководство пользователя

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C ha p t e r 5 Setup Menu
P ha s e Bi t s
Phase Bits
For units with SDI de-embedder cards installed, there may or may not
be a menu item available, entitled Phase Bts, which stands for phase
bits. If this menu item is not available, then the presence or lack of
proper phase bits is ignored and the product decodes audio properly
regardless of whether other attached equipment is setting the bits
correctly.
However, if this menu item is available, then it must be set according to
the capabilities of the attached equipment. These are bits that are
embedded in SDI streams that allow the audio sample rate to be
independent of the video pixel clock, and they are required by the latest
SMPTE standards. However, not all equipment implements these bits
correctly. Normally, this menu item should be left in the Ena (enabled)
setting, which means the phase bits are being used to properly time the
audio samples that are being de-embedded.
If you experience interrupted or garbled audio from the SDI
deembedder, try setting this to Ignor (ignore), which means the
embedded phase words are ignored. If this fixes the garbled audio,
please contact the manufacturer of the upstream equipment to
determine if any firmware updates are available for it. In cases where
phase bits are not embedded at all, or if this menu item is set to Ignor,
the pixel clock will be used as the reference for the de-embedded audio
sample rate.
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