Basic manual adjustment – Tektronix Grass Valley 3000 User Manual
Page 175
4-37
Chroma Keying Operations
Continue setup with
Optimization Adjustments on page 4-39
, or
manually adjust the Key using the Basic Manual Adjustment
procedure found in the following text.
Basic Manual Adjustment
If you prefer, you may perform the initial adjustments manually.
Following these steps once or twice gives you a feel for what Auto
Setup does for you in a few seconds.
1.
On the control panel, set the Key
CLIP
and
GAIN
approximately in the middle of their ranges.
2.
On the control panel, set
SHDW ON
to off,
BKGD SUPR
to on,
set the
LUMA
suppression to minimum, and
CHROMA
suppression about mid-way. Set
SELECTIVITY
to maximum.
a.
In the
CHR KEY
menu, set
FOREGROUND VIDEO
and
BACKGROUND VIDEO
to on, and
FOREGROUND CORING
to FIXED
b. In the
CHR KEY/SECONDARY COLOR
menu, set
SEC COLOR SUPPRESS
to OFF
c.
In the
CHR KEY/CK HUE MODIFIERS
menu, set
SEP HUE
SUPPRESS
,
FLARE SUPPRESS
and
FGD NOISE
SUPPRESS
to OFF
d. In the
CHR KEY/KEY ADJUST
menu, set
KEY WIDTH
,
KEY SOFTNESS
,
KEY POSITION
,
FGD RESHAPE
and
KEY S-SHAPING
to OFF
3.
Set the Chroma Keyer
HUE
for the approximate background
color using the panel's hue indicators. Observe the key
waveform by depressing
SHOW KEY
during this adjustment.
Don't worry about exact color match at this time.