Grass Valley AMX-1842 - Manual (Page 6)

AMX-1842 HD/SD 4 AES Embedder
Guide to Installation and Operation
Page 6 of 10 AMX-1842
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 and AES IN 3-4 select audio from the AMX-1842
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: The standard for embedded audio specifies 48kHz
sampling, synchronous to video. Sample rate converters
permit the input of asynchronous linear PCM audio;
however, AES signals containing non-PCM audio must be
synchronous 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: Select MUTE: ON or OFF, SWAP L&R:
ON or OFF, or SAMPLE RATE CONV: OFF or AUTO for
each of the four 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 by
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 fonction 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 PASS to leave any
already embedded RS-422 data untouched (no insertion)
or OVERWRITE, which embeds incoming RS-422 data to
the HD/SD-SDI signal while any existing embedded RS-
422 data is removed. 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.
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.
CONFIG TEST menu
AES IN 1, 2, 3, 4: User can enable (TONE) or disable
(OFF) a test tone (1 KHz, R-steady, L-pulsed, at –18dBFS)
on each of the four 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-1842. Those not
listed here are factory-set and cannot be user-modified.
NO SIGNAL: Errors include no signal attached to the card
input, or faulty incoming HD/SD-SDI signal.
TEST MODE: Indicates whether test signals are present
on any of the AMX-1842 outputs (audio or video).
FACTORY DEFAULT menu
Select RESTORE to reset all of the menu-adjustable
parameters to a factory-preset state (indicated in the menu
by an underline in the list of available choices).