Digigram VX442, Руководство пользователя

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VX442
User’s Manual
21
AES/EBU
The AES/EBU page of the VX442 Control Panel configures the AES/EBU
output format and displays the status of the AES/EBU input. To display this
page, click the “
AES/EBU ” tab of the VX442 Control Panel software.
DIGITAL INPUT
This group box displays the current AES/EBU input status. The VX442’s
AES/EBU receiver is capable of recognizing a valid input signal versus an
invalid, corrupt or non-present one. When a valid signal is detected at
AES/EBU In, this group box displays “
Valid Input Detected ”. When an invalid
signal is detected or no signal is present, the group box displays “ Invalid or Not
Present ”.
DIGITAL OUTPUT FORMAT
Within the “ Digital Output Format ” group, you choose the digital audio format
of the AES/EBU output. The setting “Professional” is a true AES/EBU format
and is recognized by all professional devices. The alternate “Consumer” setting
is an S/PDIF type data stream, but electrically AES/EBU. This is a work-
around that is recognized by most of S/PDIF devices.
For both consumer and professional output formats, the “ Advanced ” checkbox
will allow you to force a few particular status bits in the outgoing AES/EBU
signal. The advanced option is for expert users only; however, if you decide to
go exploring, change a few bit settings and get lost, you can always select the
“
Restore Defaults ” button to restore the outgoing status bits to their factory
settings. When both “ Consumer ” and “ Advanced ” are selected, the group
“ Consumer Format Advanced Settings ” will appear. When “ Professional ” and
“ Advanced ” are both selected, the group “ Professional Format Advanced Settings ”
will appear. These groups are described below:
Consumer Format Advanced Settings (Copy Mode): Copy protection, also
known as Serial Copy Management System (SCMS), is written into the
AES/EBU sub-code, a reserved part of the AES/EBU digital stream that is
independent of the actual audio data being transmitted. It can be used to
inhibit the amount of copies that can be made, or allow for unlimited copying.
Three SCMS modes are available. “
Original (Copy Permitted) ” indicates that the
source material may be copied by a receiving device. “ 1
st
Generation ” indicates
that the source material is a first generation copy. Most devices that are
capable of recording will reject material with this SCMS mode set. The final
option is “
No SCMS ”, which may be used to override the other two modes and
allow a recording device to successfully record the audio data. Different