
7-14
DVW-790WS/709WS/707
DVW-790WSP/709WSP/707P P2V1
7-9. VA Gain Adjustment
16:9 mode
Note
.
Use an 89.9%-reflective chart in this adjustment as
possible. (Refer to Section 7-1-4.)
.
If a “16:9” chart is not keep on hand, shoot a‘‘4:3” chart
so that the chart width is aligned with the underscanned
monitor frame.
Preparation
.
OUTPUT/DCC switch (inside panel)
→
CAM/ON
.
Shoot a grayscale chart (16:9) in the full underscanned
monitor frame.
.
WHITE BAL switch (inside panel)
→
PRST
.
AUTO W/B BAL switch (front panel)
→
BLK
(Perform the automatic black balance adjustment.)
.
On the setup menu, set as follows.
PAGE
: S35
*
PRESET WHT
ITEM
: COLOR TEMP <P> : 3200
ITEM
: R GAIN <P>
: 0
ITEM
: B GAIN <P>
: 0
Adjustment Procedure
1.
Select the 16:9 mode.
PAGE
: S14
*
WIDE SCREEN
ITEM
: 16:9/4:3 MODE
→
16:9
2.
Equipment
: Oscilloscope
Test point
: TP1 (VA-191 board)
Setting point :
1
Lens IRIS
Spec.
: A = 320
±
8 mV
3.
On the setup menu, set as follows.
PAGE
: S12
*
FUNCTION 1/2
ITEM
: TEST OUT
→
G
4.
Equipment
: Waveform monitor
Test point
: TEST OUT connector
Adj. point
:
1
RV201 (VA-191 board (G GAIN))
Spec.
: B = 100
±
2 IRE (NTSC)
B = 700
±
10 mV (PAL)
5.
On the setup menu, set as follows.
PAGE
: S12
*
FUNCTION 1/2
ITEM
: TEST OUT
→
ENC
ITEM
: GAMMA
→
OFF
6.
Select portion C by using the waveform monitor.
7.
Set the waveform monitor to the CHROMA mode.
8.
Equipment
: Waveform monitor
Test point
: TEST OUT connector
Adj. point
:
1
RV101 (VA-191 board (R GAIN))
1
RV301 (VA-191 board (B GAIN))
Spec.
: Minimize carrier leakage D by using
the variable resistors alternately.
Setting After Adjustment
.
On the setup menu, set as follows.
PAGE
: S12
*
FUNCTION 1/2
ITEM
: GAMMA
→
ON
A
D
B
7-9. VA Gain Adjustment
C
VA-191 board (A side)
1
RV101
1
RV201
TP1
1
RV301
A
1
2
3
C
B
D
E