Grass Valley ADX-1881 - Manual (Page 9)

ADX-1881 HD/SD 8 AES Disembedder
Guide to Installation and Operation
ADX-1881 Page 9 of 12
stereo sound) available to set the level from -96 dB to +12
dB in steps of 0.5 dB. To invert the selected audio channel
phase, check the Phase Invert boxes. The Lock option
locks both channel level sliders together, so that moving
one slider moves the other one as well. The Mute option
mutes both audio channels completely. The Swap option
interchanges the right and the left audio channels.
The Delay tab allows the user to set the delay of the AES
audio as it passes through the disembedder. The delay is
selectable between none, and a number of video frames (0
to 3 frames in 0.5 frame steps).
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The Disembedding tab allows the user to select which
embedded audio group will appear at the indicated AES
outputs.
The Status tab monitors some of the information carried in
the AES outputs channel status.
The Bits status monitors the audio samples word length (in
bits). The possible values are 16 bits, 20 bits, 24 bits or
other.
The Mode status monitors the channel mode. The possible
values are two channels (Two ch), one channel (One ch),
primary or secondary (Pri/Sec), Stereo or Other. If not
indicated, it will show as N/I.
The Emph status monitors the audio channel emphasis.
The possible values are None, 50/15
µ
s and J.17. If not
indicated, it will show as N/I.
The Use status monitors the use of channel status block.
The possible values are either professional (PRO) or
consumer (CONS).
The Encoding status monitors the audio channel encoding
type. The possible values are PCM or NPCM (non-PCM).
Metadata
The Metadata tab offers setting options for the output LTC
signal for the embedded time code, RS-422 signal, GP1
and GP2.
The LTC Output window allows the user to select the
source of the time code appearing at the LTC output (ATC,
DVITC). For an HD-SDI input, using the HD ATC Select
drop down menu, select the ATC signal to be disembedded
(first ATC or second ATC).
For an SD-SDI input, using the SD DVITC line drop down
menu, select the desired line to be disembedded. If the
input DVITC is in a 525 format, the available selections will
be auto or lines number 10 to 20. If the input DVITC is in
625 format, the Auto option remains, but the line numbers
vary from 7 to 22.