Grass Valley AMX-1881 - Manual (Page 7)

AMX-1881 HD/SD 8 AES Embedder
Guide to Installation and Operation
AMX-1881 Page 7 of 19
USER PRESET menu
LOAD: Selects which predefined parameter settings will be
used by loading a personalized profile.
SAVE: Saves the parameter settings in one of the five
possible user preset profiles.
INPUT SOURCE menu
GROUP1, GROUP2, GROUP3, GROUP4: Selects the
source of audio for the four embedded audio groups. AES
IN 1-2, AES IN 3-4, AES IN 5-6 & AES IN 7-8 select audio
from the AMX-1881 inputs. PASS leaves the incoming
embedded audio group intact, passing it through to the
HD/SD-SDI output. DEL deletes the incoming embedded
audio groups, leaving the HD/SD-SDI output without
embedded audio. Sample rate converters permit the AES
inputs to be synchronous or asynchronous.
Note 1 (525 format only): In order to allow the presence of
all four audio groups in the SD-SDI output, you must not
activate RS-422 serial data in the ANC Signals Menu.
Note 2: The standard for embedded audio specifies 48kHz
sampling, synchronous to video Sample rate converters
permit the input of asynchronous linear PCM audio, but
AES signals containing non-PCM audio must be synch-
ronous 48kHz. Asynchronous inputs will affect the integrity
of channel status and user data, causing error flags to be
set that may be detected by downstream equipment.
CONFIG AES menu
AES IN 1, 2, 3, 4, 5, 6, 7, 8: Select MUTE: ON or OFF,
SWAP L&R: ON or OFF, or SAMPLE RATE CONV: OFF or
AUTO for each of the eight AES channels. In AUTO mode,
AES input detected as non-PCM audio will automatically
turn off the sample rate conversion process.
LEVEL: Sets the audio gain from -96 dB to +12 dB in 0.5
dB steps.
PHASE INVERT: When “on”, inverts the selected audio
channel phase.
DELAY: sets the delay of the AES signal as it passes
through the embedder, from NONE to 3 video frames in 0.5
frame steps.
EMBED BITS: Select the number of embedded bits in the
AES signal to either 20 or 24 bits.
CONFIG LTC menu
EMBED: Permits the user to embed LTC, as ATC into an
HD-SDI signal or as DVITC into a SD-SDI signal.
DELAY: LTC delay selectable between NONE and a
number of video frames (1 to 3).
DVITC (only in video SD mode) : LINE SELECT allows
user to choose the position of DVITC in the video signal.
DUPLICATE function allows the user to insert DVITC twice,
on two different video lines. To insert DVITC twice, set
DUPLICATE feature to ON.
ANC SIGNALS menu
RS-422: The incoming RS-422 serial data may be
embedded as ANC data. Select one of three modes:
• Select SERIAL to embed RS-422 in the horizontal
interval (HANC), overwriting previously-embedded
serial data
• Select METADATA to embed RS-422 in the vertical
interval (VANC), overwriting previously-embedded
metadata,
• Select OFF to leave RS-422 data untouched (no
insertion)
Note: In the 525 format, at least one of the four audio
groups must be set to DELETE in the Input Source menu
to allow RS-422 insertion.
Only works with signals at 38.400 or 115.200 Bauds with
accurate selection of BAUD RATE.
SAMPLED GPI 1, 2: The incoming GPI status data is
sampled and may be embedded as ANC data. Select
PASS to leave any already embedded GPI data untouched
(no insertion) or OVERWRITE, which embeds incoming
GPI data to the HD/SD-SDI signal while any existing
embedded GPI data is removed (NB: select EMBED in the
GPI Mode menu to enable this function).
AUTO BLACK menu
Turn AUTO BLACK ON or OFF. Auto Black replaces the
video input with a locally-generated video black in the
event of an input failure, to maintain audio embedding.
ASPECT RATIO menu
AFD MODE: Choose whether to PASS incoming AFD
flags, BLANK them, or INSERT new flags in their place.
AFD VALUE: Select the AFD flag to insert if selected in
AFD MODE. The available choices are format-dependent.
GPI MODE menu
Select EMBED to embed GPI data in the ANC, or USER
PRESET to use the GPI 1 and 2 inputs to select User
Presets 1 and 2 in operation.
TEST menu
AES IN 1, 2, …,8: User can enable (TONE) or disable
(OFF) a test tone (1 KHz, R-steady, L-pulsed, at –18dBFS)
on each of the eight AES channels individually.
COLOR BAR: User can enable (ON) or disable (OFF) color
bars on the video output.
TC LOOP: User can enable a test loop (10 second loop
starting at 23:59:00:00) that is inserted into the video as
ATC (HD-SDI video) or DVITC (SD-SDI video).
CONFIG ALARM menu
The user can configure the status LED presentation
(ALARM LEVEL) and fault reporting (NONE or GPI) for
some of the fault conditions of the AMX-1881. Those not
listed in the menu are factory-set and cannot be user-
modified.