Grass Valley AMX-1881 - Manual (Page 11)

AMX-1881 HD/SD 8 AES Embedder
Guide to Installation and Operation
AMX-1881 Page 11 of 19
The Input aspect ratio section indicates the presence of
AFD and VLI flags in the incoming video via status icon s
(green if flags are present; gray otherwise), and displays an
interpretive graphic that incorporates the flag code.
The Output Aspect Ratio section provides controls for
insertion of aspect ratio signalling in the output data
stream.
Use the radio buttons in the Insertion box to select AFD,
VLI or OFF as the insertion mode.
•
Incoming aspect ratio data of the selected type will
be deleted, and replaced by a specified flag,
designated at the bottom of the panel.
•
If the AUTO box is checked, the AMX-1881 will pass
any incoming flags of the selected type unchanged,
but when no flag is detected on the input, it will
insert a specified flag into the output data stream.
Any incoming aspect ratio signalling data that is not
selected for overwriting via the Insertion controls may be
either blanked or passed, using the radio buttons shown:
• PASS: pass any incoming
flags unchanged
• BLANK: delete any incoming
flags
Incoming data that is selected for overwriting via insertion
will be gray – e.g. AFD in the figure.
• INSERT: insert an AFD flag in the output, overwriting
any incoming flags
• AUTO: Pass any incoming flags unchanged, but when
no flag is detected on the input, insert a specified flag
into the output data stream.
The INSERT and AUTO modes require the user to select a
flag to insert. The graphic shows the code for the current
selection, while the Change button opens a window
showing all available flags.
Scroll down if necessary to see all possible flag options.
Click on one to select it, and click Apply at the bottom of
the window to confirm the selection.
Use the AFD Field 1 and AFD Field 2 pulldowns to select
the line on which AFD information will be inserted on the
two fields.
NOTE: If incoming flags are found on a line after the
selected insertion line, the AMX-1881 will not be able to
change its insertion decision in the AUTO mode until the
next field/frame, and will therefore not be field/frame
accurate.