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Densité 3+ FR1
User Manual
Mode tab
Click the
Mode
tab.
Fig. 4-8: Mode tab
URS (Universal Reference Signal)
is a Grass Valley proprietary reference that is used within
a Densité frame. It is generated by the REF-1801-FR1 (which must be located in slot 5), and
distributed to other cards in the frame via the frame’s midplane.
To select the URS generator operating mode
Use the pulldown to select between these options:
•
Normal
– In normal mode, the URS signal generated contains only the synchronization
signals that match the reference format used by the REF-1801-FR1. That is, if input is
NTSC, only 29.97Hz synchronization signals are sent.
•
Free Run
– If the free run mode is selected, all URS synchronization signals are
generated, even the frame-rate-mismatched ones. So, in the same frame, some cards
can work in 25Hz frame rate and other cards in 29.97Hz. The phase relation between
these two frame rates will be arbitrary, thus the name “free run”.
Output and SPG Option tabs
Both tabs are greyed out because the SPG option (available on the standard REF-1801 card)
is not available for the REF-1801-FR1.
For the same reason, the two Output status icons at the top of the panel are always gray.
