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© Calibre UK Limited Issue 1.30 27 January 2012, W: www.calibreuk.com
T:+44 1274 394125 F: +44 1274 730960 E: techsupport@calibreuk..com 16
3.7.5. Aspect Ratio
Settings: Scale, Preserve
The system can be set to scale the input image to a fixed output resolution or, with the setting preserve,
to chose an output resolution matching the input resolution. If no matching output resolution is available
or no input is detected, the pre-defined output resolution is used though.
3.7.6. Overscan
Settings: 0 to 10 in steps of 1
Overscan is used to slightly zoom into the image. Thus, the border area of an image is no longer
displayed on the screen. This cuts off unwanted features at the top or bottom from e.g. video images.
3.7.7. Pan Tilt Zoom
This menu provided settings to zoom and shrink the image, as well as panning within the image.
Pan Tilt Zoom (PTZ) can be switched on or off. When switching on the latency of the system is
increased by one frame. Thus, there is a difference of a PTZ setting off or on with no zoom. PTZ
settings can be saved per mode or globally, i.e. the same PTZ settings are applied when switching input
channels or changing the input mode.
The Zoom slider allows to zoom into the image or shrink it. When Aspect Lock is set to On the separate
slider for zooming vertically is greyed out and the horizontal zoom or shrink factor is used as vertical
factor as well. The aspect ratio is preserved. When Aspect Lock is Off horizontal and vertical scaling
factors can be chosen separately.
With the Pan and Tilt sliders panning within the image in horizontal and vertical direction is possible. Off
raster panning is allowed, i,e, the image can be shifted outside the active area of the display.
For convenience the PTZ settings can be reset with one button.
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