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G)
AUTO/B&W switch (13. INPUT VIDEO board)
AUTO:
This
switch
detects
if
burst is present
in
the
VTR
playback
signals,
and automatically
sets
the
system
to
color
or black-and-white
mode.
B&W:
This
sets the
whole
system
to
monochrome
opera-
tion
a
nd
the write
clock
is
controlled by
the
H
SYNC.
@
CABLE COMPENSATION
switch
(13.
INPUT VIDEO
board)
This
switch
serves
to
compensate
for
deterioration
in
the
frequency response
caused by
t
he
cables
between the
VTR
and
BVT-2000. Compensation
for cable
length
s
of 0,
5,
10
and
25 meters corresponding to
pins
1,
3, 5
and
7 of
SW4
is
available.
@
Y/C DELAY COMPENSATION
switch
(13.
INPUT VIDEO
board)
This switch serves to
compensate
fo
r
the
Y/C
group
delay
difference
produced
in
the
VTR
or
BVT-2000
across
a
±
IO
nsec
range.
The
Y
/C
delay
compensatio
n
makes
use
of
the
all-pass
network,
and
the delay
time
of
the chroma
signal
can
be
selected
with respect
to the
Y
signal
in
accordance
with
the
position of
this
switch.
The
delay
time
in
the
chroma
band
can
be
switched
t
o
- 75
,
-50,
- 25,
O,
+25,
+50,
a
nd
+75
nsec corresponding
to the
switch
pin position
l
,
2, 3,
4
, 5,
6
a
nd
7.
©
DIRECT/PROCESS
switch
(12. HETERODYNE
COLOR
board) Option BK-2003
This
switch
is used only
fo
r
U-mat ic
VTRs.
DIRECT:
Set the switch to
this
position
when
a
heterodyne
color
VTR
(such
as
Sony
's
BVU-200A
or
BVU-J
00),
which
is
provided
with a
n
SC
input
connector for Y
/C
interleaving,
is
connected.
PROCESS:
Set
to this
position when
a
heterodyne
color
VTR (such
as
Sony's
V0-2860),
which
does not
have
an
SC
input connector
for Y/C interleaving,
is
connected.
@
COLOR FRAMING ADJUSTMENT
vrs
& lamps
@
COLOR FRAMING NORMALiADJUST
switch
& lamp
}
(7
.
SEQUENCER
board)
This
control
sec tion
consists
of
two
variable resistors
and
two
light-emitting diodes.
Adjust
this
section
when
the
color
phase
must be
repeat ed
with
a
high
level
of precision, fo
r
example,
editing
accurately
a
tape
which is
recorded with
color
framing servo,
or
when
composing video
animat
ion.
Turn the
@
NORMAL/
ADJUST
sw
itch
to ADJUST
(LED
ligh
ts up) and
adjust the
CD
two variable
resistors so that the
two
CD
LEDs
light
up.
After
adjustment, be sure to
set
the
@
NORMAL/
ADJUST switch
to
NORMAL
position.
(The
3
LEDs
go
off.)
If
the
SYSTEM
SYNC
PHASE
control
and
the
SYSTEM SC
PHASE control arc
turned
after
adjusting
these two
variable
resistors,
turn the @NORMAL/ADJ UST
switch
to ADJUST,
and make
sure
that the
two
LEDs
light up.
If
they
do
not
light
up,
readjust
the
two variable
resistors.
Q)
DOC ON/OFF
switch
(6.
SYNC
GENERATOR 2
board)
ON:
This is t
he
normal
position
.
Off':
This turns
the
dropout
compensa
tion
off.
@
V BLANKING LINE SELECT switches
(6.
SYNC GENERA·
TOR 2 board)
8
circuit
switches
By
setting
switch
2
and switch
3
to
ON, it
is
possible
to
select
a
ny
line
in
the
vert
ical blanking
period
which
corresponds to
the
number
of
the
board
,
and
so these
are
used to
shape the
lines
and set
them to
the
pedestal
level.
®
LOCK MODE lamps
(3.
SYNC GENERATOR 1 board)
1-12
The
appropr iate lamps
illuminate to
show the
type
of reference
signal
being supplied
to
the
BVT-2000
(COLOR/SYNC/
INTERNAL).
ADVANCED SYNC AUTO/MANUAL switch
} (3.
SYNC
ADVANCED SYNC PHASE control
GENERATOR
ADVANCED SYNC PHASE IN lamp
1 board)
AUTO:
This is
used
to
compare
the
reference vertical
sync
with the
VTR
playback
vertical
sync phase,
and
control
the
advanced sync
phase
automatically
so
tha
t
the
playback video phase
is
brought
to
the
center
of the window.
MANUAL:
This
is
used to
allow
the
advanced
sync
phase to
be
controlled with the
advance
sync phase
control
trimmer
vr3.
(Adjust
so
that
the
ADVANCED
SYNC PHASE
IN
lamp
lights up.
This
lamp
corresponds to
the
OFF
TAPE
V-PHASE
IN
lamp
on
the front
panel.)
•
Use
the
MANUAL
mode
when
there are
problems
with
the
rise response
in
the
AUTO
mode.
REFERENCE SELECT switch (3. SYNC GENERATOR 1
board)
This
switch
is used
to set
the
BVT-2000's reference
signal
to
COMP
VIDEO
,
SC,
or
COMP SYNC. Internal
lock
is
automatically set when a
signal
which
corresponds to
the
position
of
this
switch
is
not
connected
to
the connector
panel.
HD SIGNAL PICK UP
}
@
VD SIGNAL PICK UP
(3
.
SYNC GENERATOR 1
board)
SIGNALGND
These can be used for the
ex
ternal
sy
nc
signals
of
the
oscilloscope,
if
so
required,
when checking
the
wave-forms of
the TBC
sections.
@
BURST LEVEL
&
PHASE
controls
(4
.
PROCESSOR board)
These
are used
to
adjust fi nely the burst
level
and the
burst
phase of the output.
@
SYNC LEVEL control
(4.
PROCESSOR board)
This is
used
to
adjust
finely
the
sync
level
of the
ou tput.
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