Crystal Vision
Statesman operation
TANDEM-300 User Manual R1.2
26
14/02/2008
HANC processing
TANDEM-300 provides an option to blank the HANC space before embedding takes
place to make room for new audio groups. If only one audio group is present in the
incoming SDI data stream, and a new audio group of the same number is to be embedded,
then the HANC space is blanked automatically and the ‘Auto Blank HANC’ LED is
illuminated.
To manually blank the HANC space before embedding tick the ‘HANC blank before
embedding’ box.
The HANC error indicator will illuminate if there is no further room in the HANC space
to add another audio group.
TANDEM-300 should not be set to embed any further groups unless the option to blank
the HANC space before embedding is selected.
Caution should be exercised when adding further embedded audio when ‘marked for
Deletion’ or ‘Other Data’ are already present. The HANC space could then be over-filled
and data lost. The EDH is particularly vulnerable in Sony mode as the tail end of the
insert may overwrite the EDH data.
The subject of HANC processing is discussed in detail in the Data packet management
chapter.
Setting audio delay
Once routing and delay has been assigned the value of the delay can be set using the
sliders on the Audio Delay menu.
Audio delay for mode 1
The destination pairs for which the delay is active will be shown using the card edge
codes under each slider. Delay can be set from 0 to 681 milliseconds.
