I would concur that every RDM device must have at least 1 personality.
There is no requirement that the personality has a non zero dmx footprint.
Thus I would support the view that the device info field should never appear to have a personality/number of personalities of 0x0000 or 0x0100.
"Discoverable devices" such as splitters that have no dmx footprint should still have at least a single personality. Some, such as the Pathway unit, have several modes of operation and thus the potential for multiple personalities.
It is true that a device that has no DMX footprint will not be correctly discovered by the DFD Remote Addressing Device (RAD) - but this is really a problem for the RAD to resolve, and should not generate any requirement for splitters to have spoof dmx footprints.
Peter Willis
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