Gamma Correction Adjustment - Sony Betacam SX DNV-5 Maintenance Manual

8-12. Gamma Correction Adjustment

8-12. Gamma Correction Adjustment
Preparation
. OUTPUT/DCC switch (inside panel) → CAM/ON
. Shoot a gray-scale chart in the full underscan's picture
frame.
: 1 Lens IRIS
Setting point
: A (white level) = 100 ± 2 IRE
Spec.
. On the setting menu, set as follows.
PAGE : LEVEL 6
: TEST OUT → G
ITEM
Adjustment procedure
1. On the setting menu, adjust as follows.
PAGE : LEVEL 3
ITEM : MASTER GAMMA
: B = 63 ± 2 IRE (NTSC)
Spec.
B = 420 ±14 mV (PAL)
2. On the setting menu, set as follows.
PAGE : FUNCTON 1/2
: TEST OUT → ENC
ITEM
: TEST SAW → ON
ITEM
3. On the setting menu, adjust as follows.
PAGE : LEVEL 6
ITEM : R GAMMA
Spec. : Adjust the illuminated spot at the center
of the vectorscope.
Y
L
G
8-12
A
B
M
G
R
B
C
Y
4. On the setting menu, adjust as follows.
PAGE : LEVEL 6
ITEM : B GAMMA
Spec. : Adjust the illuminated spot at the center
of the vectorscope.
5. Repeat steps 3 and 4 several times, adjust the illumi-
nated spot at the center of the vectorscope.
6. Make sure that the carrier leak at the portion B is not
observed.
Setting after adjustment
. On the setting menu, set as follows.
PAGE : FUNCTION 1/2
: TEST SAW → OFF
ITEM
B
DNV-5
DNW-7/90/90WS