Gamma Correction Adjustment - Sony Digital Betacam DVW-707 Maintenance Manual

7-12. Gamma Correction Adjustment

Preparation
. Lens IRIS
MAN
. OUTPUT/DCC switch (inside panel)
. Shoot a grayscale chart (16:9) in the full underscanned
monitor frame.
Equipment : Waveform/Vector monitor
Test point : TEST OUT connector
: 1 Lens IRIS
Setting point
: A (white level) = 100 ±2 IRE (NTSC)
Spec.
A (white level) = 700 ±14 mV (PAL)
. On the setup menu, set as follows.
PAGE : S24*LEVEL 7
ITEM : TEST OUT
Adjustment Procedure
Equipment : Waveform/Vector monitor
Test point : TEST OUT connector
1. Select the 16:9 mode.
PAGE : S14*WIDE SCREEN
ITEM : 16:9/4:3 MODE
2. On the setup menu, adjust as follows.
PAGE : S21*LEVEL 4
ITEM : MASTER GAMMA
: B = 63 ±2 IRE (NTSC)
Spec.
B = 420 ±14 mV (PAL)
3. On the setup menu, set as follows.
PAGE : S12*FUNCTON 1/2
ITEM : TEST OUT
ITEM : TEST SAW
DVW-790WS/709WS/707
DVW-790WSP/709WSP/707P P2V1
16:9 mode
CAM/ON
A
G
16:9
B
ENC
ON
4. On the setup menu, adjust as follows.
PAGE : S25*LEVEL 8
ITEM : R GAMMA
Spec. : Position the illuminated spot at the
center of the vector monitor.
Y
L
G
5. On the setup menu, adjust as follows.
PAGE : S25*LEVEL 8
ITEM : B GAMMA
Spec. : Position the illuminated spot at the
center of the vector monitor.
6. Repeat steps 4 and 5 several times, position the
illuminated spot at the center of the vector monitor.
7. Make sure that the carrier leakage at the portion B is
not observed.
Setting After Adjustment
. On the setup menu, set as follows.
PAGE : S12*FUNCTION 1/2
ITEM : TEST SAW
7-12. Gamma Correction Adjustment
M
G
R
B
C
Y
B
OFF
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