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A 25Hz input mode is output at twice the frame rate 50Hz.
An exception to the 24/25Hz input mode treatment is if the output resolution is set to 480i or 480p. 480i
and 480p are always run at 60Hz output rate.
50Hz input modes are displayed at 50Hz output rate.
The output frame rate can also manually set to 24Hz, 48Hz, 50Hz or 60Hz if possible, i.e. such output
modes are available.
Only 720p and 1080p output modes are available with 24Hz refresh rate.
480i and 480p output modes are only available at 60Hz refresh rate.
For all other modes 48Hz, 50Hz and 60Hz refresh rate is available.
3.5.5.
I/O Lock
Available settings: Off, Source, Genlock, Auto
If I/O Lock is switched off the output is run with a fixed refresh rate determined by the frame rate setting.
This setting will result in the output vertical refresh rate deviating from the input refresh rate, even if both
are nominally at the same rate. This causes occasional frame dropping or repeat.
If I/O Lock is set to Source the output refresh rate is following the input video refresh rate if possible.
If I/O Lock is set to Genlock the output refresh rate is following the vertical sync of an externally
provided signal (GENLOCK BNC) if locking is possible.
Locking is achieved by modulating the output clock and works if input and output refresh rate are
nominally at the same rate, e.g. when frame rate is set to 60Hz and the video input is also 60Hz. If e.g.
the video input rate is 50 Hz and the Frame rate is set to 60Hz, the output will enter free run mode.
Note: When Frame Rate is set to Auto the matching frame rate is chosen.
When I/O lock is set to Auto and a Genlock source is present to the GENLOCK BNC. The processor will
lock with the external genlock signal if possible. If genlocking is not achievable, locking to the video
source frame rate is tried. If that is not possible the output is running in free-run mode.
The status line of the OSD window under Sync Mode indicates if the output signal is locked to the input
signal (I/O Locked or Genlocked) or in free run mode (Free Run).
3.5.6.
Native Color Temp
Settings: 5500, 6500, 7500, 9300, 10000
Native Colour Temp allows the user to select from pre-configured colour temperatures to match the
display. If both Native Colour Temp set here in the Output menu and Colour Temp set in the Colour
menu are set to the same value, no conversion is performed.
3.5.7.
Output Gamma
Settings: 1.0 to 3.0 in steps of 0.1
Output gamma allows to re-gamma video signals with pre-configured gamma values to match the
display. Input gamma and output gamma both default to 2.2. If they are both set to the same value,
there is no effect on the image.
Note: If e.g. an adjustment to reduce the level of red in the image is required, select a higher number for
the (input) Colour Temp in the Colour menu, or a lower number for the Native Colour Temp in the
Output menu.
©
Calibre UK Limited Issue 2.30
nd
22
April 2013
18
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