JVC GY-DV500U Service Manual page 78

Measuring
No. Item instruments &
Input signals
ABL adjust- • Oscilloscope
2
ment (H-rate, 10:1)
or WFM
• Gray scale chart
(precise
scanned size)
– C A M E R A A D J U S T M E N U – 5 / 6
F L A R E B : O
F L A R E R : O
A B L A D J U S T : O
D S P d a t a
< B c h > < G c h > < R c h >
3 2 3 2
3.5.6 Iris Level Adjustment
1 IRIS LEVEL • Oscilloscope
adjustment (H-rate, 10:1)
or WFM
• Monitor TV
• Gray scale chart
(precise
scanned size)
– C A M E R A A D J U S T M E N U – 6 / 6
I R I S L E V E L : O
Mode
Adjustment
menu 5/6
3 2
Adjustment
menu 6/6
Measuring point (*)
Adjustment parts (-)
Adjustment level (+)
* TEST OUT
(1) Rotate the SHUTTER/MENU dial to select
(75 Ø terminated)
MENU 5/6: ABL.
- SHUTTER/MENU
(2) Push the SHUTTER/MENU dial so that the ad-
dial
justment value blinks then rotate it to adjust to
+ Gray scale chart
the specified level.
window black level:
(3) Push the SHUTTER/MENU dial to store the
NTSC 110 +5/–0 mVp-p
adjustment data in memory.
PAL 55 +5/–0 mVp-p
* TEST OUT
(1) Rotate the SHUTTER/MENU dial to select
(75 Ø terminated)
MENU 6/6: IRIS LEVEL.
- SHUTTER/MENU
(2) Push the SHUTTER/MENU dial so that the ad-
dial
justment value blinks then rotate it to adjust to
+
NTSC 0.714 ± 0.03 Vp-p
the specified level.
PAL 0.7 ± 0.03 Vp-p
(3) Push the SHUTTER/MENU dial to store the
adjustment data in memory.
Adjustment procedure
NTSC 0.714 Vp-p
PAL 0.7 Vp-p
3-11
3-10