EVS Synapse UXU500, Installation And Operation Manual, Page: 59 / 72

If the master card can handle less then 32 channels, the lowest channel numbers will be used, as the
ADD-ON card will always generate 32 channels (where some channels can be empty or silent).
• Channel shuffling is done in the ADD-ON card.
The master card has only one setting to enable the quad speed audio bus.
• Every Quad-Speed ADD-ON card takes 32 channels from the ‘right hand ADD-ON card’ and adds (or
overwrites) the local processed channels.
This can be done for any of the channels that are processed in the ADD-ON card.
• Some master cards are switchable between normal and quad-speed bus.
• Channel designations on the block schematics:
Channel 1-32 (or less) are injected into the large, dark green arrow from the master card to the ADD-
ON card and looped onto the next ADD-ON card via the dark green arrow.
The ADD-ON card injects up to 32 channels into the large brown arrow.
An ADD-ON card will also actively loop extra processed channels into the next ADD-ON card, and
finally into the master card.
• The cross looping of the original design is now a straight loop.
• The quad speed bus can also work in one direction.
You can use a Quad Speed audio bus to de-embed audio from the master and present on the ADD-
ON card as AES/EBU, Bitstream (like Dolby) or analog audio.
If applicable, the ADD-ON card can also be used as in injection point of physical audio streams.
The ADD-ON cards also provide a looping function from one ADD-ON card to the next. This is however
more intelligent looping, with optional re-insertion and multiplexing of signals.
Cascading of Quad Speed cards works identically to normal add-on cards. Every connection in the
example below transports 16 mono audio channels (= 32 channels per color). It shows the inter-slot
connections ‘in quad Speed mode’ as part of the frame bus PCB.
INSTALLATION AND OPERATION MANUAL
Synapse UXU500-510 | Appendix 3: Quad Speed ADD-ON Bus | 51