GUIDE TO INSTALLATION AND OPERATION
REF-1801 |
11
3.3.3 Mode
tab
URS (Universal Reference Signal) is a Miranda-proprietary
reference that is used within a Densité frame. It is generated by
the REF-1801 (which must be located in slot 10), and distributed
to other cards in the frame via the frame’s midplane.
URS Generation Mode
The pulldown allows selection of the operating mode of the URS
generator in the REF-1801:
Normal
– In normal mode, the URS signal generated contains
only the synchronization signals that match the reference format
used by the REF-1801. That is, if input is NTSC, only 29.97Hz
synchronization signals are sent.
Free Run
– If the freerun 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 freerun.
3.3.4 Output
tab
The Output tab provides resources to configure the sync outputs
that are enabled by the SPG option.
•
The controls on this tab are not functional if the SPG
option has not been enabled
Each of the two sync outputs can be configured independently.
Format
– the pulldown selects the format of the sync output.
Available choices are:
•
Black Burst 59.94
•
Black Burst 50
•
Tri-Level
1080i59.94
•
Tri-Level
1080i50
•
Tri-Level
720p59.94
•
Tri-Level
720p50
•
DARS
48
kHz
•
Word Clock 48 kHz
Note that not all of these output choices will be available at all
times. The output formats available depend on the format of the
reference input.
Figure 3.3
Mode tab
Figure 3.4
Output tab
