Sony PMW-EX1 Service Manual page 55

4. White Shading Adjustment
The White Shading menu enables the adjustment of the
horizontal and vertical Saw correction level and parabola
correction level.
m
. The White Shading adjustment cannot be executed for
the correct adjustment values if the object pattern has
non-uniformity or if other conditions such as lens iris
setting and zoom setting are not correctly satisfied. .
. Use a full white pattern for the White Shading adjust-
ment having uniform brightness over the entire area.
. If a full white pattern having uniform brightness over the
entire area is not available, do not execute the G-channel
White Balance adjustment. Instead of it, execute the
White Balance adjustment in the way of aligning the R-
channel waveform and the B-channel waveform to the
waveform of G-channel.
. The White Shading setting menu can be used to turn
White Shading correction On or Off.
The White Shading setting is turned On automatically
when the power is turned On.
. The Channel Select menu enables selection of the
channel (G-ch or B-ch or R-ch) to execute the H Saw, H
Para, V Saw, and V Para white shading adjustments on.
. When the Channel Select menu selects any other chan-
nel, the displays of the H Saw, H Para, V Saw, and V
Para setup values are changed to the current setup values
of the channel selected by the Channel Select menu. The
changes are reflected on the H Saw, H Para, V Saw, and
V Para setup values.
. The H Saw menu enables the horizontal Saw white
shading correction (linear increase and decrease) level.
. The H Para menu enables the horizontal Parabola white
shading correction (sensitivity correction at the horizon-
tal center with respect to both ends) level.
. The V Saw menu enables the vertical Saw black shading
correction (linear increase and decrease) level.
. The V Para menu enables the vertical Parabola white
shading correction (sensitivity correction at the vertical
center with respect to both ends) level.
PMW-EX1
White shading adjustment method
Preparation
. Connect an HD waveform monitor to the SDI OUT
terminal.
. HD waveform monitor setting: RGB mode
. Focus → ∞
. Shoot an all white pattern over the entire frame of
monitor screen.
Adjustment Procedure
. Adjust lens iris until white level becomes approximately
80%.
If the lens iris value is larger than F5.6, adjust the
incoming light intensity by using electronic shutter for
the lens iris setting of smaller than F5.6.
. Adjust H Saw, H Para, V Saw and V Para for the
respective channels of G-ch, B-ch and R-ch until wave-
form on the waveform monitor becomes flat.
(H SAW) (H PARA) (V SAW) (V PARA)
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