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Sony SB-V3000 - Electrical Adjustments; 7-1. Confirmation of Input Signal; 7-1-1. Adjustment of YC Separation Level

Sony SB-V3000
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SECTION
7
ELECTRICAL
ADJUSTMENTS
7-1,
Confirmation
of
the
input
signal
For
electrical
adjustment,
the
video
signal
obtained
from
the
pattern
generator
is
used
as
the
adjustment
signal.
Therefore,
it
is
necessary
that
this
video
output
signal
is
within
the
standard.
1)
When
inputting
an
S
video
signal
Connect
the
oscilloscope
to
the
Y
signal
terminal
of
the
S
video
input
terminals
(terminal
plate)
and
confirm
that
the
amplitude
of
the
SYNC
signal
of
the
Y
signal
is
approximately
0.38Vp-p
and
that that
of
the
video
section
is
approximately
0.7Vp-p.
(Furthermore,
when
using
the
VTR
with
the
S
video
output
terminals,
confirm
that
the
chroma
signal
and
the
burst
signal
do
not
remain.)
Also,
connect
the
oscilloscope
to
the
chroma
signal
terminal
of
the
S
video
input
terminals
and
confirm
that
the
burst
signal
amplitude
of
the
chroma
signal
is
approximately
0.3Vp-p
and
flat,
and
that
the
level
ratio
of
the
burst
signal
and
the
chroma
signal
is
0.30:
0.66,
The
Y
signal
and
the
chroma
signal
to
be
used
for
adjustment
are
shown
in
Fig.
7-1.
Y
signal
Approx,
0.7V
Approx,
0,3V
Horizontal
SYNC
signal
Chroma
signa
Chroma
Burst
amplitud
amplitude
Burst
signal
(Should
be
flat)
Burst
amplitude
:
Chroma
amplitude=0.30
:
0.66
'
Fig.
7-1,
Colour
bar
signal
of
pattern
generator
[Setup
for
adjustment]
For
the
electrical
adjustment,
the
video
signal
obtained
from
the
PAL
pattern
generator
is
used
as
the
adjustment
signal.
Therefore,
it
is
necessary
that
this
video
output
signal
should
be
within
the
standard.
Connect
the
oscilloscope
to
the
video
input
terminal
and
confirm
that
the
amplitude
of
the
SYNC
signal
of
the
video
signal
is
approx.
0.3V
and
that
of
the
video
section
is
approx.
0.7V.
Also
confirm
that
the
burst
signal
amplitude
is
approx.
0.3V
and
flat,
and
that
the
level
ratio
of
the
burst
signal
and
the
“red”
signal
is
0.30
:
0.66.
The
video
signal
(colour
bar
signal)
to
be
used
for
adjustment
is
shown
in
Fig.
7-2.
Adjust
to
these
levels
White
(Approx.100%)
fq
Signals
excluding
the
Y
signal
Approx,
0,7V
Burst
Signal
Horizontal
SYNC,
signal
(Should
be
Flat)
Fig.
7-2.
Colour
bar
signal
of
pattern
generator
7-1-1,
Adjustment
of
YC
separation
level
(CY-5
Board)
24,(4],
Monit
Measurement
point
[4],
[6]
and
Monitor
in
output
Measurement
equipment
Oscilloscope
RV500,
RV501,
j
|
Adjustment
elemant
RV502,
RV503
Adjust
the
white
level
of
the
COMPOSITE
signal
and
the
Y
signal
Specified
value
(adjusting
method)
1)
Input
the
colour
bar
signal
to
and
adjust
the
output
waveform
of
[2],
2)
Input
the
colour
bar
signal
to
and
adjust
the
output
waveform
of
[4].
Input
the
colour
bar
signal
to
and
adjust
the
output
waveform
of
[6].
3)
Turn
off
the
V-S
switch.
(by
pushing
the
CLEAR
button.)
4)
Switch
MONITOR
over
to
the
output
of
[5]
(INPUT
“OUTPUT
selector
SW)
and
adjust
the
waveform
of
the
output
of
MONITOR
[1].
=
i022

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