Crystal Vision
Control Descriptions
3G range has been set to bypass by checking
the Bypass box in the ‘Output Format & Timing’
menu. For the Q-Down 3G to enter bypass mode
both the input and output selection must be the
same otherwise the bypass command will be
ignored. As it is not possible to select a 3G
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 Q-Down
3G range 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 ‘Aspect Ratio Correction’ for more details.
Disabled
The ARC is disabled when in ‘bypass’ or ‘pass-
through’ mode.
Q-Down-AG 3G/ATG 3G User Manual R2.1
30
11 July 2019
