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G)
POWER
switch,
POWER lamp
When
the
POWER
switch
is
turned
on,
the
POWER
lamp
lights
up
and
power
is supplied to
the circuitry.
If the
temperature
inside
the BVT-2000
sh ould
rise to
an unusually
high level
(because
of a
ventilator
breakdown, for instance), the POWER
and INPUT
LEVEL lamps
will
blink
on
and
off. Search
for
the
cause
of
the.
malfunction as described in
"Blinking
of POWER
or
LEVEL
INPUT lamps" under section 1-3.
@
INPUT
LEVEL control, INPUT
LEVEL PRESET
switch, IN-
PUT
LEVEL lamps
®
MANUAL:
The
INPUT
LEVEL
control
can
be used
to
set
the
A/D
conve
rter's
input
level.
•
When
the
left red lamp
lights up,
this
means that the
input
level
is
low
and
that
the
S/N
ratio
is
unfavorable.
•
T
he
center green
lamp lights
up
to
indicate
the best
possible
setting.
•
The
right red lamp
shows
that
there
is a possibility that
the
high
level
component
may be
clipped due
to overloading.
Detection
of
the level depends
on
the
VTR's sync
level
a nd
not o
n
the
signal
content.
.
PRE
SET:
T
he TBC
input amp gain
is
set to the neference
level
regardless
of
the position of this
control.
VIDEO
control,
VIDEO PRESET
switch
MANUAL:
Th
is enables
the
@
VIDEO-I
,
@
VIDE0-2
and
@
VIDE0-3 (described from now as the
TBC output) video
level
to be adjusted within a
PR
ESET:
range
of
±3
dB.
The TBC output video
level
is
set
to the reference
level
regardless
of
the
position
of
this
control.
©
CHROMA
control,
CHROMA
PRESET
switch
MANUAL
:
This
control
allows the TBC ou
tput
chroma
level
to be adjusted
within
a
range of ±3
dB
.
PRESET:
The TBC
output
chroma
level
is
set
to
the
reference
level
regardless
of the
position
of
this
control.
@
SET
UP
control, SET
UP PRESET
switch
MANUAL:
This
control
allows
the
TBC output
set up
level
to
be adjusted
within a
range from
0 to
15
IRE
units of the reference
level.
PRESET:
The T BC
output
set
up
level
is
set
to
the
refer-
ence
level
regard
less
of
the
posit ion
of this
control.
@
HUE
control,
HUE PRESET
switch
MANUAL:
This
control
allows the
TB
C ou tput
hue levei
(burst
and
chroma
relative p
hase)
to be
adjust-
ed
across a
range of± 15°
.
PRESET:
The T
BC output
hue level is
set to
the reference
level
regardless
of the
position
of
this
control.
0
NORMAL/BYPASS
switch,
BYPASS
lamp
NORM
AL
:
A
time-compensated
output
appears
in
the TBC
outpu
t.
BYPASS:
A bypassed
output appears
in
the
TBC
output,
and the
BYPASS lamp
comes on.
@
CNR ON/OFF switch,
CNR
la
mp
ON:
The
video
signals
are Y/C
separated
,
and
only
the
chroma
signal
is line
added to the
I
H
prior
signal
and
averaged.
The chroma
S/N ratio
is thereby
improved
by
3
dB
.
Of'f':
The
video signa
l
bypasses-the
above processing system.
1-7
®
DG
control,
DG PRESET switch
MANUAL:
This
control is used
to
linearly compensate the
differential gain
of
the TBC output
across a
range
of
±8%.
PR ESET:
The
differential
gain
bypasses the
above
process-
ing
system.
DP
control,
DP PRESET
switch
MANUAL:
This
control
is used
to
linearly compensate the
differential
phase of
the
TBC
output across a
range
of ±8°
.
PRESET:
The differe
ntial
phase
bypasses
the
above
process-
ing system.
@
VIDEO PHASE control, VIDEO PHASE PRESET
switch
MANUAL:
This
control
is
used
to
move
the video
phase
of
the
TBC
output within
a range of
900 nsec p-p
(1
PRESET:
step
=
280
nsec).
The
TBC
output
video
phase
is
set
to the
referen-
ce
level
regard less
of the
position
of
this
control.
@
SYSTEM SYNC PHASE control,
S_
Y STEM SC PHASE control
These
two
controls are
used
when
you
want
to
adjust the
SYNC phase a
nd
the
SC
phase of the
TBC
output
with
respect
to
the BVT-2000's
reference
input.
For
instance,
they
can
be
used
to bring
the output phase
in line
with the station's reference, or when
two
or
more
VTRs
and
TBCs
are
being
used
to produce
fades,
lap-dissolve and
special
effects.
•
The
SYST
EM SYNC
PHASE
adjustable
range
is
±
3 µser.
•
The
SYSTE.M SC PHASE adjustable
range
is 360° p-p.
There
is
usually
virtually
no
need
to
move
these two
controls
when
performing
ordinary
maintenance
work
after
the
BVT-2000P
has been
installed in
the
studio
,
etc.
In
cases
like this, the
phase may undergo a great change
when
they
are
touched
in
error
if
the
variation
range
is too
great
and
so
by
partially
remodeling
the
ST~8
printed
circuit board,
the
variable
range
of the
control
panel's
SYSTEM
SYNC
PHASE
and SYSTEM SC
PHASE controls
can
be
reduced
to about
one-tenth
of
their
normal
range.
The
remaining
nine-tenths
are
adjusted
with
the
vrs
on
the
ST-8 printed
circuit
board.
@
LOCAL/REMOTE
switch,
REMOTE lamp
LOCAL:
All
the
controls
and
switches are
operated on the
fro nt
panel
of the
BVT-2000
,
REMOTE:
Operation
is
provided by
the
controls a
nd
switches
on
the
optional
remote
control
unit
for TBC applications regardless of
the
positions
of
the
controls
and switches
on
the
BVT-2000
front
panel.
The
REMOTE lamp
comes
on.
@
DIRECT COLOR/U-matic
switch,
DIRECT
COLOR/U-matic
lamp
DIRECT
COLOR:
U-matic:
Set
the
switch to
this posit
ion
when
combining the BVT-2000 with
a
direct
color
VTR
(such
as
Sony's BVH-1 100).
The DIRECT
COLOR lamp comes
on.
Set the
switch to
this
position
when
combining
the
BVT-2000
with
a
U-matic
VTR
(such
as So ny's BVU-200A
or
100).
The U-matic lamp
comes
on.
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