Grass Valley Imagestore 750 v.2.0.1 - Manual (Page 58)

Front Panel Operations Imagestore 750 User Manual
Page 58 Miranda Technologies Inc.
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This option allows a rectangular mask to be applied onto each physical SDI
input.
To adjust the input mask values for an input, select it using the joystick
arrows ⊳ , and press enter. Pressing enter after adjusting the Bottom value
will accept all changes made. Pressing escape prior to this returns all settings
back to their previous values.
Warning: Setting masks will directly affect the equivalent SDI source,
so anything else that uses that source (for example, the AB
Mixer or a DVE Input) will be also affected.
If an input is associated with a colour field or test pattern (so
that it is not using its SDI input source), then the image will
not be masked. Only the SDI source is masked.