Grass Valley MRC v.1.2 - Manual (Page 53)

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Miranda Router Configurator
User’s Guide
Remember that every router configuration must have at least one level and signals can be
switched only within a level, not between levels.
How to Delete a Level
1 Go to the ‘Router Level’ page. From the Control Cards table at the bottom of the page, select
a control card.
2 In the ‘Crosspoint Ranges for Level Setting’ table, click on the row representing the level to
select it. Then click Delete Level.
(In the confirmation window, click YES.)
3 Repeat step 2 for other levels you want to delete.
4 Click Update Control Card to send the level information to the control card.
5 Each control card in the router must be configured separately and identically.
Either repeat this procedure for each control card in the router . . .
Or, finish making all changes to the control card and then copy its configuration to the
remaining control card(s) in the router. See
Copy Settings Page on page 78.
Special Audio Sources
 The special audio sources section of the page applies only to NV8500 hybrid routers, and
then only to those hybrid routers that use disembedder/embedder output cards.
The special audio sources are artificial (or fictitious) sources that are recognized, and used, by
router firmware to perform special functions.
The special audio sources do not produce audio of any kind. What they do is signal to the router
control card that it must perform specific operations with regard to embedded audio output.
Because the special audio sources are fictitious, it is recommended, for any of the special audio
sources, that you specify one of the unused audio ports in your router. (They are included in the
port numbering, but there is no circuitry for those ports.) Note that a port committed to a
special audio function cannot be used as a normal audio port.
 Regarding unused audio port numbers: always choose unused audio port numbers that are
greater than the number of video input ports of the router. Unused port number between
1152 and 2304 will work well for any NV8500 router. Figure 3-1 on page 38 for example
shows that audio ports in the range 1281–1296 were used.
The special audio sources are involved in the logic of disembedder/embedder cards. A card
output receives either (1) generated silence, (2) audio from the router’s audio matrix, (3) audio
disembedded from the video at the output.
Important: the different special audio sources — unless the fields are disabled or blank — must
all have different values. The router will still function, but it might not function the way you
expect. In such cases, the router’s behavior is not easily definable.