Sony DVS-7250 Operation Software page 130

I/o expansion system

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To mask unwanted portions or defects in the key or background, there are

two masks you can use: the main mask and the subsidiary mask.

• The main mask uses as source signal the box generator built into each

• The subsidiary mask uses as source signal a wipe generator from an M/E

You can use the main mask and subsidiary mask independently, or you can

use both simultaneously.

Using the main mask

By way of example, the following procedure uses the main mask on keyer 1

of the M/E-1 bank.

Chapter 4 Basic Operations for Image Creation

keyer, or a dedicated mask pattern generator.

bank or the PGM/PST bank or a signal selected on the utility bus.

In the M/E-1 KEY 1 menu, select item 4 (MAIN MASK).

The MAIN MASK menu appears.

Function key indications in the MAIN MASK menu

Press F2 or F3, turning it on, to select the mask type.

F2 (KEY MASK): key masking

F3 (BKGD MASK): background masking

Press F4 or F5 to select the mask source.

F4 (BOX): rectangular mask generated by the internal box generator

F5 (PATTERN): mask from the dedicated pattern generator