Operating instructions

© Calibre UK Limited Issue 2.41 20
th
May 2014, W: www.calibreuk.com
T:[phone] F: [phone] E: techsupport@calibreuk..com 20
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
not, the output is operated with a fixed refresh rate determined by the frame rate setting. (When Frame
Rate is set to Auto a frame rate matching the nominal frame rate of the source is chosen.)
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. If not the output is operated with a fixed refresh
rate determined by the frame rate setting. (When Frame Rate is set to Auto a frame rate matching the
nominal frame rate of the source is chosen.)
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 Frame rate is set to 60Hz, the output will enter free run mode.
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).
If the unit is to be used as a clean switcher the settings for Frame Rate and I/O lock need to be chosen
carefully. Obviously, clean switching cannot be achieved if output frame rate locking to input video
(Source) is selected. Even if the to be switched input channels have signals attached with nominally the
same frame rate they always differ slightly and a new lock has to be established causing disturbances.
The following combinations of Frame Rate and I/O Lock settings determine the switching behaviour:
I/O Lock = Source
(Lock to i/p video)
I/O Lock =
Genlock
I/O Lock = Off
(Free Run)
Auto Frame Rate
Never Clean
Always Clean
Depends on Inputs
Fixed Frame Rate (any)
Never Clean
Always Clean
Always Clean
Note 1: The Auto Frame Rate vs Fixed Frame Rate function determines Genlock behaviour as well as
I/O Lock and Free Run behaviour. In Auto Frame Rate mode Genlock signals of 50Hz or 59.94/60Hz
are accepted, but in Fixed Frame Rate mode only a Genlock signal which matches the chosen Frame
Rate is accepted. So for example if the unit is fixed at 60Hz frame rate output it will not lock to a 50Hz
genlock reference, but will only lock to a 60Hz genlock reference.
Note 2: In Auto Frame Rate mode with Free Run Mode selected input switching may or may-not be
clean, this depends on how close the frame rates of the current and next input channel are.
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.