4-39 (E)
BVP-550
4-3-15. Gamma Correction Adjustment
Equipment
: Waveform monitor, Vectorscope
Test Point
: TEST OUT connector
Object
: Grayscale chart
Preparations:
• Connect the waveform monitor to the TEST OUT
connector.
• Connect the vectorscope to the PIX OUT terminal on the
waveform monitor.
• Shoot the grayscale chart so that the chart frame is
aligned with the underscanned monitor frame.
• RGB/ENC switch (on the side panel)
→
ENC
• Set the DISP switch (on the side panel) to MENU while
holding down the MENU SEL switch (on the front
panel). Set the menu as follows.
MENU
: Paint
PAGE
: Gamma (P5)
ITEM
: Gamma
→
On
PAGE
: Knee/W.Clip (P6)
ITEM
: Knee
→
Off
Iris of the lens
: A = 100
±
2 IRE (for NTSC)
A = 700
±
14 mV (for PAL)
Adjustment Procedures:
1.
Set the RGB/ENC switch (on the side panel) to RGB.
Set the R/G/B switch (on the side panel) to G.
2.
Set the menu as follows, and adjust the gamma
correction for (M) by using the MENU SEL switch.
PAGE
: Video Level (P1)
ITEM
: Gamma [M]
Specifications
: B = 55.5
±
2.0 IRE (for NTSC)
B = 420
±
14 mV (for PAL)
(Waveform Monitor)
3.
Set the menu as follows.
MENU
: Paint
PAGE
: Video Level (P1)
ITEM
: Test
→
1
4.
Set the RGB/ENC switch (on the side panel) to ENC.
5.
Adjust the auto white balance.
WHT BAL switch (on the side panel)
→
A
AUTO W/B BAL switch (on the front panl)
→
WHT
6.
Set the menu as follows, and adjust the gamma
correction for (R) by using the MENU SEL switch.
MENU
: Paint
PAGE
: Video Level (P1)
ITEM
: Gamma [R]
Specifications
: Center the beam spot on the
vectorscope.
7.
Set the menu as follows, and adjust the gamma
correction for (B) by using the MENU SEL switch.
MENU
: Paint
PAGE
: Video Level (P1)
ITEM
: Gamma [B]
Specifications
: Center the beam spot on the
vectorscope.
8.
Repeat the steps 6 and 7 alternately, until the beam
spot is minimized on the vectorscope.
(For NTSC)
(For PAL)
(Vectorscope)
4-3. Overall Electrical Alignment
4-3-15. Gamma Correction Adjustment
R
M
G
C
Y
G
Y
L
B
R
M
G
C
Y
G
Y
L
B
Содержание BVP-550
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