Sony MVS-8000X User Manual page 259

Lit amber: Shows the DME assigned to a key other than the currently
selected key.
Off: DME is not assigned.
To select a DME being used by another keyer
Press [Override], turning it on, then select the DME channel.
The later selection is valid, and the button lights green.
Using two or three DME channels on one keyer
Notes
When the signal format is 1080P, the combination of two consecutively
numbered DME channels that can be selected is DME1 and DME2, DME3 and
DME4, DME5 and DME6, or DME7 and DME8. It is not possible to combine
three or more DME channels.
1
Select the DME for the first channel (see the previous item, "Assigning a
DME to a key"), then select the successive channel for the second channel.
For the third channel select the channel after that.
2
To select the second channel video signal, hold down the [UTIL] button in
the cross-point control block, and select the signal in the Key1 row (DME
external video bus).
3
To select the third channel video signal, when the selected DME is Ch3 or
Ch4, select the signal on the DME utility 1 bus. When the selected DME
is Ch7 or Ch8, select the signal on the DME utility 2 bus.
For details of the method of signal selection, see "Bus Selection" (page
147).
Using four DME channels on one keyer
Notes
When the signal format is 1080P, this operation cannot be carried out.
1
Select the DME channel 1 (or channel 5) for the first channel (see
"Assigning a DME to a key" (page 258)). In the same way, select the DME
channel 2 (channel 6) for the second channel, the DME channel 3 (channel
7) for the third channel, and the DME channel 4 (channel 8) for the fourth
channel.
2
For the second channel video signal, select the signal on the DME external
video bus.
Key Setting Operations With the Key Control Block
259