TV One C2-2375A Series, Operation Manual

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C2-2375A S
ERIES
O
PERATION
M
ANUAL
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selected lock source (RGB1 in this example). The lock mode can be either Off,
Genlock or Lock & Mix, with the operation of these shown in the following table:
Lock mode Description
Off The output resolution of the Output is defined by the setting
for Output Resolution and there will be no background
source visible.
Genlock The output video will be “Genlocked” to the selected lock
source. The output signal will be synchronous to the input
sync and adjustable but there will still be no lock source
visible.
Lock & Mix The output video will be locked to the selected source, the
syncs will be locked (but with an additional internal video
processing delay) and the background for the output will be
that of the Lock source (unless foreground and background
are swapped).
Frm.lock* The frame rate of the output will be locked to the frame rate
of the input. This can only work if the output resolution
frame rate matches that of the lock source frame rate.
‘Frm.lock’ will flash until a highly stable lock has been
achieved.
*Only certain models support this.
In both Genlock and Lock & Mix modes the source selected for the lock input
determines the resolution of the Output image. The output resolution for the entire
image can be no different than the resolution of the lock source. All synchronization
signals are re-generated within the unit so they may look slightly different when
compared on an oscilloscope to the original source.
In Frame-lock mode, the output resolution is independent of the lock source, but the
frame-rate must match that of the source (e.g. 1280x1024 60Hz can be frame-
locked to 640x480 60Hz). Frame-lock is very useful for synchronizing a HD-SDI
output (e.g. 1080i 59.94Hz) to a composite video source (e.g. NTSC), or for scaling
one resolution to another while avoiding any potential frame-rate conversion
artifacts.
'H/V shift' can be used to align the output to the input more accurately, but this may
cause instability until the lock is re-acquired ('Frm.lock' will flash).
Before turning the Lock feature on, you first must select a valid Lock source. Some
units may not have all Lock sources available, depending on hardware limitations –
see Specifications for details of limitations on your unit.
If the Lock source you choose is not valid, then Genlock or Lock & Mix will be
temporarily disabled, until the Lock source becomes valid again. When disabled,
the resolution previously specified in ‘Output res’ becomes the output resolution.