Adjustments And Cautions When Operating The Camera - Hitachi FP-Z31 Operation Manual

6.5

Adjustments and cautions when operating the camera

T PR -1
C C
RV-1 eJMODE
RV-2
SET
@
t
G)
·-
6.5.1 Auto iris control
This-control circuit is located in the TC unit and it enables the video signal detection method to be selected.
(1 � Peak v alue detection (P)
( 2) Average value detection (A)
. _
Example
Bright windo w
Th is kind of situation is also controlled by the area of the bright section. A mixture of peak and average
detection can be provided at the "P" and "A" intermediate positions. The auto iris level is set by RV-2
[SET]. For a normal setting, shoot an EIA standard gray scale c�art and set the video level to about 100%.
EN
DTL PR -2
C
C
B-G
RV-10
0
RV-11 G-B
@
G-R
RV-12
0
RV-13 R-G
0
ON
SW-1
MASK
[C]
OFF
t
®
/
-
%
� 10Q _ _:_ __
MODE ..
'
Jt
--Face
.
A
% - - ---.-------
0
:{
Dark area
,;;:,. � 100 %- - - A--
p
0 % ------ ----·
_J----\._
SG ENT ASU
C
RV-3 �
S .F
C
S
SW1
fnl
� OARSE 1
C
SW2
C
C� ARJl 2
C
[CJ
RV-l � I
H.P
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The iris is controlled by the peak value of the
video signal.
The iris is controlled by the average value of the
video signal.
Window
:r � e face remains relatively ident-
1f1able although the window be-
. . comes a white blotch.
The window succumbs
-
mally to white blotching
the
face darkens and
readily identifiable.
PWR
min1-
but
is
not
29