JVC GY-HC900CHE Instructions Manual page 69

Vertical Shading Adjustment
Adjustment of white shading is needed when
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you have changed the lens.
Although white balance may be appropriate at
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the center of the image, this may not be the case
at the top and bottom areas.
If this is the case, the image will appear greenish
or yellowish. This phenomenon is due to the
characteristics of the lens. The process of
correcting this phenomenon is referred to as
vertical shading adjustment.
Perform this process after adjusting the white
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balance.
Setup Prior Adjustment
1 Obtain the white balance on the camera.
(A P67 [Memory A Mode (A), Memory B Mode
(B)] )
2 Set the control of the camera lens as
follows.
A Set the iris to F4.0 or narrower to obtain the
appropriate brightness.
If the brightness is insufficient at F4.0, obtain the
appropriate brightness such as by adjusting the
lighting.
B When using a zoom lens, set to the center of the
zoom adjustment range.
3 Fill the monitor screen with a pattern box of
a uniform light source, or a piece of white
(plain) paper that is uniformly illuminated.
4 Set the chroma level of the monitor to the
maximum.
5 Check the monitor screen.
There is no need for adjustment if there is no
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color at the top and bottom of the screen.
If the top of the screen is greenish and the
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bottom is reddish or vice versa, continue this
adjustment.
Adjusting the Vertical Shading
1 Set [Camera Process] B [White Balance] B
[V. Shading] to "On".
2 Select [Adjust...] in [V. Shading] and press
the Set button (R).
The Vertical Shading Adjustment screen
appears.
Evaluated Level Meter
Evaluated Value Detection Frames
.
3 Press the [USER1] button to set to perform
automatic adjustment.
You can use the R, G, B channels individually
to adjust the value of the evaluated level meter
up to a margin error of ±1 from the median value.
4 Adjust manually.
If you want to adjust manually after automatic
0
adjustment is performed, follow the steps
below.
You are recommended to adjust the G
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(green) level only.
If manual adjustment in not necessary,
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adjustment is complete at step 7.
5 Use the cross-shaped buttons (HI) to
select the item to adjust from ［R］/［G］/
［B］.
6 Adjust the setting value using the cross-
shaped buttons (JK).
Adjust the sliding bar for setting while
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referring to the evaluated level meter.
Adjust the values such that the evaluated
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value falls almost at the center of the meter
using the K cross-shaped button if the
evaluated value of the channel to be adjusted
is larger than the median value, and the J
cross-shaped button if the evaluated value is
smaller than the median value.
7 Press the Set button (R) to save the setting.
Make sure to press the Set button (R) to save
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the setting.
Pressing the [CANCEL/RESET] button
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discards the setting and returns to the menu
screen at the next higher level.
Adjusting the White Balance
Sliding Bar for Setting
Setting
Value
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