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

4-6. Gamma Correction Adjustment

Preparation
. Lens IRIS → MAN
. OUTPUT/DCC switch (inside panel) → CAM/ON
. Shoot a grayscale chart (16:9) in the full underscanned
monitor frame.
Equipment : Waveform monitor
Test point : TEST OUT connector
Setting point : 1 Lens 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 : TEST OUT connector
1. Select the 16:9 mode.
PAGE : E14*WIDE SCREEN
: 16:9/4:3 MODE → 16:9
ITEM
2. 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)
3. On the setup menu, set as follows.
PAGE : E12*FUNCTON 1/2
: TEST OUT → ENC
ITEM
: TEST SAW → ON
ITEM
DVW-790WS/709WS/707
DVW-790WSP/709WSP/707P P1
4. On the setup menu, adjust as follows.
16:9 mode
5. On the setup menu, adjust as follows.
A
6. Repeat steps 4 and 5 several times, position the
7. Make sure that the carrier leakage at the portion B is
Setting After Adjustment
. On the setup menu, set as follows.
PAGE
ITEM
B
PAGE : E25*LEVEL 8
ITEM : R GAMMA
Spec. : Position the illuminated spot at the
center of the vector monitor.
M
R
Y
L
G
C
Y
PAGE : E25*LEVEL 8
ITEM : B GAMMA
Spec. : Position the illuminated spot at the
center of the vector monitor.
illuminated spot at the center of the vector monitor.
not observed.
: E12*FUNCTION 1/2
: TEST SAW → OFF
4-6. Gamma Correction Adjustment
G
B
B
4-9