User manual

Imagestore User Manual Front Panel Operation
Miranda Technologies Ltd Page 55
Adjusting Clip, Gain and Transparency
If external faders are being employed for control of clip, gain and
transparency, Imagestore will not offer front panel level setting and will
instruct the user to use the faders. Enabling and disabling external faders is
described in the configuration and set-up section of this manual.
When the clip, gain and transparency option is applied, the user is first
offered an opportunity to adjust the current clip level. The minimum and
maximum levels are shown to the left- and right-hand sides of line two of the
display, with the currently selected level shown in the middle. The right and
left arrow keys W X are used to increase and decrease the setting
respectively.
The setting is applied by pressing the enter key. Once set, the display moves
on to the next parameter Adjust Gain. The adjustment is made in exactly the
same way as for Clip.
Once Gain is set the display moves on to the final adjustment (Adjust
Transparency), which is set in the same way as Clip and Gain.
Clip Level
Clip is the level under which the key signal will be forced to black. In a
keying process this will result in a total absence of fill video in areas where
the incoming key signal is less than the clip level.
Gain Level
The gain level amplifies the key signal, forcing grey levels towards, and up
to, white level. In a keying process this will result in the fill signal being less
transparent than it otherwise would be in areas with a grey key signal.