Gamma Correction Adjustment - Sony DIGITAL BETACAM DVW-707 Maintenance Manual

5-6. Gamma Correction Adjustment

Preparation
. Lens IRIS →MAN
. OUTPUT/DCC switch (inside panel) → CAM/ON
. Shoot a grayscale chart in the full underscanned monitor
frame.
. Equipment : Waveform monitor
Test point : TEST OUT connector
Setting point : 1Lens IRIS
: A (white level) = 100 ± 2 IRE (NTSC)
Spec.
A (white level) = 700 ± 14 mV (PAL)
. On the setup menu, set as follows.
PAGE : E24*LEVEL 7
: TEST OUT → G
ITEM
Adjustment Procedure
Equipment : Waveform monitor
Test point : VIDEO OUT connector
1. On the setup menu, adjust as follows.
PAGE : E21*LEVEL 4
ITEM : MASTER GAMMA
: B = 63 ± 2 IRE (NTSC)
Spec.
B = 420 ± 14 mV (PAL)
2. On the setup menu, set as follows.
PAGE : E12*FUNCTION 1/2
DVW-790WS/709WS/707
DVW-790WSP/709WSP/707P P1
ITEM
ITEM
3. On the setup menu, adjust as follows.
PAGE
ITEM
Spec.
4. On the setup menu, adjust as follows.
A
PAGE
ITEM
Spec.
5. Repeat steps 3 and 4 several times, position the
illuminated spot at the center of the vector monitor.
6. Make sure that the carrier leakage at the portion B is
not observed.
Setting After Adjustment
. On the setup menu, set as follows.
B
PAGE
ITEM
5-6. Gamma Correction Adjustment
: TEST OUT → ENC
: TEST SAW → ON
: E25*LEVEL 8
: R GAMMA
: Position the illuminated spot at the center
of the vector monitor.
M
G
R
Y
L
B
G
C
Y
: E25*LEVEL 8
: B GAMMA
: Position the illuminated spot at the center
of the vector monitor.
B
: E12*FUNCTION 1/2
: TEST SAW → OFF
5-7