Crystal Vision
Control
Descriptions
output, selecting bypass will also be ignored
with a 3G input present. In bypass mode the
analogue output selection remains active along
with the analogue RGB and YUV proc-amps and
the delay controls. The digital proc-amps will be
disabled and the SDI delay through the Wallbox
Q-Down will be set to its minimum processing
delay. (SD approximately 2uS delay and HD less
than 1uS delay.)
Incompatible
Output
This LED will be on should the video input format
and output format selection become
incompatible, which would be the case if the
input is a lower bit rate than the output selection.
Output Aspect
Ratio
Anamorphic
16x9 Letterbox
14x9 Letterbox
Centre Cut
These LEDs indicate what aspect ratio correction
is being performed. There are four fixed aspect
ratios which are: Anamorphic, 16:9 Letterbox,
14:9 Letterbox and centre cut. Anamorphic will
map the input picture directly to the native
aspect ratio of the viewing display along with the
resulting distortion associated with this. Should
it be necessary to view the output on a 4:3
display, setting the aspect ratio selection to
Letterbox will give the correct picture
dimensions by adding black bars to the top and
bottom of the picture. Selecting 14:9 Letterbox
will crop the picture to 87.5%, and depending on
the aspect ratio of the display will either add
black bars to the top and bottom or both sides of
the picture. There will be some loss of picture.
Centre cut will show the central 75% of the 16:9
widescreen picture mapped to the full monitor
height with the corresponding loss of the left and
right picture edges. See section
Disabled
The ARC is disabled when in ‘bypass’ or ‘pass-
through’ mode.
Wallbox Q-Down User Manual R1.0
31
08 August 2016
