Automatic Iris Adjustment - Sony Betacam SX DNV-5 Maintenance Manual

8-19. Automatic Iris Adjustment

Preparation
. On the setting menu, set as follows.
PAGE : LEVEL 7
: TEST OUT → ENC
ITEM
. OUTPUT/DCC switch (inside panel) → CAM/ON
. Shoot a gray-scale chart in the full underscan's picture
frame.
. Lens IRIS → AUTO
Adjustment procedure
Test point: TEST OUT connector
1. On the setting menu, adjust as follows.
PAGE : LEVEL 9
ITEM : IRIS MODE
Spec. : Set the automatic iris operation mode
depending on the application.
Automatic iris operation mode setting can be done
from the average level to peak-to-peak level of the
video signal.
IRIS MODE = MIN → peak-to-peak level
IRIS MODE = MAX → average level
2. On the setting menu, adjust as follows.
PAGE : LEVEL 9
ITEM : IRIS SET
: A = 100 ± 2 IRE (NTSC)
Spec.
A = 700 ±14 mV (PAL)
3. On the setting menu, set as follows.
PAGE : LEVEL 9
: IRIS WEIGHT → 0 (MIN)
ITEM
4. Shoot a avoid working area of auto iris in the white
window chart?
5. On the setting menu, adjust as follows.
PAGE : LEVEL 9
ITEM : IRIS WEIGHT
Spec. : Increment the IRIS WEIGHT value
until the lens iris is open.
DNV-5
DNW-7/90/90WS
6. On the setting menu, adjust as follows.
PAGE
ITEM
Spec.
A
8-19. Automatic Iris Adjustment
: LEVEL 9
: IRIS SPEED (Factory setting: 0)
: Set to the desired operation speed of
auto iris.
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