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when you’re trying to output black, there will be a ‘hot area’ where the two
projectors are now overlapping, of twice the projector’s ‘black level’ output.
The solution is to adjust the ‘Eb comp cent’ value (the first in the ‘Eb comp
cent/side’ menu) to compensate for this centre brightness error. By
increasing this value, it will increase the brightness of the non-overlap area.
To get this value right, you must first make sure that the units connected to
the projectors are outputting black – e.g. in the Adjust windows menu you can
disable the output. Then increase the ‘Eb comp cent’ value until the non-
overlap area’s brightness has increased to be the same as the overlap
(centre) area.
The 2
nd
value (‘Eg comp side’) is for where horizontal and vertical edge
blending is being performed – e.g. a 2x2 arrangement. This value increases
the brightness of the overlapping areas, with the exception of the centre
‘square’ where all projectors overlap.
13.12
Aspect ratio adjustment
Since your original video source is probably 16:9 (or a similar aspect ratio), it
will also be necessary to change your vertical zoom value differently to the
horizontal one. This is best done after projector alignment by performing the
following:
1. Go to the ‘Adjust windows’ menu and change ‘Aspect adjust’ to
‘Advanced’. This enables separate H & V zoom adjustments.
2. Go to ‘Adjust windows’ for Output 1 (1A) and you will now be able to
adjust the vertical zoom independently of the horizontal zoom. H zoom
should be left as it is, so adjust the V zoom until the correct aspect ratio
of your output is achieved.
3. Go to ‘Adjust windows’ for Output 2 (2B) and adjust the V zoom to the
same value as Output 1 (1A).
13.13
Locking both outputs together
If your video source contains live (moving) video then it is worthwhile locking
one channels’ output to the other’s – this will eliminate any line or frame drift,
which may cause frame-rate conversion problems. This is best done by
locking Output 2 to Output 1.
For dual-channel units such as the C2-7000 series, perform the following:
1. Go to ‘Adjust outputs’
2. Ensure that ‘2B’ is selected – press Toggle 1 / 2 (Shift-1) if not.
3. Where ‘Lock [Off] RGB1’ is seen (where RGB1 is the default Lock
source), change the Lock source to ‘OUT1’.
4. Then change the Lock method from ‘Off’ to ‘Genlock’.
For single-channel units (such as the C2-1000 and C2-2000 series) you can
probably only perform locking if RGB1 is available for use (i.e. you are using
CV1 or YC1 as your video source). If so, perform the following:
Содержание C2-7100
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