Why there are there question marks?
These question marks mean that the selected DMX address is not assigned to a
number in a lamp chain.
Example:
The user has set one RGB+W lamp as DMX address 1 and sequence number in
chain: #1 and the DMX footprint is 1-4. The DMX address for the next lamp should
be 5. Instead of using the DMX address 5 which would have a sequence number in
chain: #2, the user sets the DMX address 6 and this results with "??" symbols as it is
unknown which device it is in the lamp sequence. This can be ignored if the user is
intentionally addressing lamps a specific way outside the normal pattern of
addresses for the lamp type.
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