Crystal Vision
The card edge display
TANDEM-110 User Manual R1.8
60
07/07/2010
4.7 Data packet management settings
Contiguous packing
TANDEM-110 supports contiguous packing, which ensures that new audio data packets
are embedded at the first free location after the EAV in the HANC. Contiguous packing
allows for all four groups and other data, such as groups ‘marked for deletion’ to co-exist
sequentially in the HANC.
Non-contiguous packing would overwrite existing data. Although this saves on HANC
space the start of the next group is likely to be damaged on some TV lines.
Marking groups for deletion
If an incoming audio group is the same as an audio group selected for output in that SDI
path it can be flagged as ‘marked for deletion’ so that downstream devices do not detect
that group.
TANDEM-110 will automatically assign ‘mark for deletion’ for a side configured as a de-
embedder and ‘contiguous packing’ for a side configured as an embedder.
The packing status is obtained with Menu lever 5 ON (DOWN), all other levers UP (OFF
)
and the SEL switch in position 8 for side 1 or 9 for side 2.
SEL
Display
Comments
8
9
SD1 contig or markdel
SD2 contig or markdel
Shaft encoder will not be active since the
assignment is automatic
Blanking HANC before embedding
This removes all incoming ancillary data except EDH after the inputs have been read and
before any new data is embedded.
The menu is obtained with Menu lever 5 ON (DOWN), all other levers UP (OFF
)
and the
SEL switch in position A for side 1 and B for side 2. Turn the shaft encoder to select
between ‘SDx blank’ or ‘SDx noblnk’, where x is the TANDEM-110 side 1 or 2.
SEL
Display
Comments
A
B
SD1 blank or noblnk
SD2 blank or noblnk
Use shaft encoder to select blank or noblnk.
It is recommended to leave this setting as
‘noblnk’ for normal operation.
