Sony BVT-2000 Operation And Maintenance Manual

SONY:

1

DIGITAL

TIME

BASE

CORRECTOR

BVT-2000

•

.

.

.....

OPERATION

AND

MAINTENANCE MANUAL

TABLE OF CONTENTS

1.

OPERATION

FEATURES

1-1.

SPECIFICATIONS

1-2.

1-2-1. General . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-2-2. Video . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-2-3. Input signal s

Output

1-2-4.
1-2-5. Processor adjustment range

1-3

. INSTALLATION INSTRUCTIONS

1-

3-1. Installation location

1-3-2. Installation conditions . . . . . . . . . . . . . . . . . .

1-3-3. Pre-operatioIJal check list . . . . . . . . . . . . . . . .

1-3-4. Operating precautions

1-4. OPERATION CONTROLS

1-4-1. Control panel

1-4-2. Connector panel . . . . . . . . . . . . . . . . . . . . . 1-9

1-4-3. Printed circuit board

1-5.

SIGNAL CONNECTIONS

1-6.

OPTIONAL ADAPTOR AND
1·6·1. Dynamic tracking memory board
1-6-

2. Heterodyne color
1-7. BREAKERS
1-8. RACK MOUNTING

1-9

. SLIDE RAIL MOUNTING

1·10. REPACKI

.. , ......................

..

................

signals

......................

.....................

VTR

........................

....................

NG

........................

...................

. . .

....

.
.

..............

..........

....

.......

..............

...................

.................

ACCESSO~IES

color processor BK-2003 . . . 1-14

............

.....

............

.
.

...

.. 1-5
: .

.....

. 1-14

.. ..

1-

2

1-

3

1-

3

1

-3

1-

3

1

-3
1-3
1-4
1-4
1-4
1-4
1-4

1-6

1-1
1-13
I-14
1-14

1-15
l-I
1-17

SPARE PARTS

1

6

ST-8 (N) Board ; Control Panel

LP-9 Board

D0-9

(N)

Board;

Dropout Detector

PW-42 (N)

AC-16 Board
VS-7

Frame Wiring . . . . . . . . . . . . . . . . . . . . . . . 4-77

MB-5
AT-5 Board
LC-3

Control Panel Ass'y . . . . . . . . . . . . . . . . . . . . . 1

Chassis Ass'y . . . . . . . . . . . . . . . . . . . . . . . . . 3

Heat Sink Ass'y
Connector Panel Ass'y

Board;

Board

Board

Board

Power Supply ....

.......................

...

...

....

.......

........

........

. 4-73

.......

.....

4-71

4-75

5

7

2. CAUTION & OTHER

INFORMATION

3. BLOCK DIAGRAMS

4. SCHEMATIC DIAGRAMS

@ I

V-1

(N) Board ; Input

@

CK

-5 (N) Board ; Main Cl

1

/3

..............

2/3

..........

3/3

...................

@ CK-3 (N) Board ;

Video Amplifier

ock

.

Sub

Clock

@ AD-8 (N) Board ; A-D Converter

1/2

®

.......

2/2

............................

MY-3

(N) Board ; 8-Line Memory

. .

...................

(j) SQ-3 (N) Board ; Sequencer

A/ ABC . . . . . .

B/ABC
C/ABC

........

........

@ SG-28 (N) Board ; Sync Generator 2

1

/2

...........................

2

/2

@

©

G)

Q)

..........

D0-12

(N)

Board;

1/3

............

2

/3

.................

3/3 ..............

BD-5

(N) Board ; Bidirex

1/2

...............

2/2

....

PR-22 (N) Board ; Processor

1/2

.......................

2/2

...........

SG-18 (N) B

A/ABCD
B/ABCD
C/ABCD .
D/ABCD

oard;

...........

.........

..............

.....

.

........

...

Dropout Compensator

..

.....

Sync Generator 1

...

.......

.......

.

.....

................

........

._

. . . . . . . . . . . . . 4-25

.......

..

. . .

.... ......

.

............

. .

.

.....

...............

.

.........

.

.....

....

. .

.

.......

........

......

........

.........

. .

........

..........

......

.

........

.........

.

...

.....

.

.....

.....

.. .....

....

.

...

...

...

4-1

4-4
4

-7
4-10
4-13

4-17
4-19

. . 4-22

4-28

. 4-31

4-34
4-37

4-40
4-43
4-46

4-51
4-53

4-57

. 4-59

4-63
4-65
4-67
4-69

1-1. FEATURES

Cor

rection

range

of

4 Hp-p

to

12

Hp·p

The memo ry
errors up to a maximum
combining
board, time base errors up

built

it

with the

into

the

model can

of

4Hp-p in the

opt

ional dynamic tracking memory circuit

to

be

used

VTR

12 Hp-p (additi

to

output.

on

circuit board) can be corrected.

Also,

if

output has no horizontal n;iovement (break-up)

Wide

When combined
dynamic track ing mechanism,
playback from
twice the rated speed

playback
In this case, the
is

Built-in 9-

The BVT-2000 processes

the above correction range is exceeded, the BVT-2000

or

range

dynamic

is also

tracking

with

one

-fourt h the rated speed

known

optiona

playback

the

model

BVH-1100

th

e model allows dynamic tracking

in

the forward direction. (

as guard band noise-less playback.)

l dynamic tracking memory circuit board

VTR

in

the rewind direction

required .

bit

analog-digital

converter

the

video signals

by

converting the analog
signals to the 9-bit digital signals. With this system,
of

the

VTR playback signal which is caused

by

using the TBC can

practically be ignored.

Clock

frequency

four

times

the

value

of

subcarrier

The clock frequency required to convert the vid
digital data is sel
a K factor

4.2

MHz are

ected

of

less th

obtained

to four times

an

l % and a flat frequency response

without

the

subcarrier frequency and

taxing the signal processing functions

in any way.

1 H

prior dropout

Thanks to the provision
dropout

section can

compensation

of

be rep

laced by a l H prior signal featuring a

with

a digital

digital Y

dropout

/C

separation

high signal correlation.
Since 1 H prior
of

the
compensation,
Furthermor
dropout compensati
need to adjust

Synchronizes
tape

playback

The BVT-2000 can synchronize the
reference sign

the fast forward, rewind
traveling

dropout

signals in the replaced section

the

e, since digital Y /C separation

the

to

compensation displays a higher correlation

than

2 H prior

dropout compensa

tion

effect

is greatly improved.

is

on,

a high stability

is

yield

ed

gain or phase.

external

reference

signals

with

high

VTR output

al

s and produce stable color while the tape is set to

at

not more

or slow mot

than

l 0 times faster

ion

/st

ill pla

yback if the tape is

or

slower

tape speed.

Built

-in velocity

The phase
due to tlie inclusi

The BVT-2000 is also equipped with a

matic phase
error compe nsator, helps

±2

within

Built-in s

The built-in sync ge nerator can be gen locked

video signals,

error

.5 nse

ync

error

compensation

is

con

tinu

ous

ly compensated for within each li

on

of

the built-in veloci ty error compe nsator.

contro

l (APC) which, in company with

to

keep the residual phase errors down to

cs

for

col

or

signal

s.

generator

or

composite sync signals, subcarrier

unique

to

switch to the proper positio n when required.
When the gen l
auto

matically by the internal source.

ock

signa

ls

are n

ot

connec

ted, sync is genera ted

.correct time base

Moreover, by

of

one

memory

sync fluctuations.

equipped with a

to

Thi

s form

of

S/N

deterioration

frequency

eo

signals into

so

up

to

compensator, the

drop

out

employed for the

and there is no

and

low

speed

to

external

than the normal

ne

high-speed auto-

the

velocity

external refer ence

by

setting the

Picture

improvement

As outlined below,

functions

the

BVT-2000 f

eat

ures a

numb

er

of

picture

improvement functions.

• Cable compensation
The

cable compensation circuit built

enabl

es

deteri~ration

be

cable to

compensated.

to

the frequency response caused by the

into

the input video circuit

• Differential gain compensation
Differential gain produced
sa

ted for across a range

by

the VTR can be linearly compen-

of ±8%.

• Differential phase compensation
Differential phase produced by the VTR can be linearly
compensated for across a range

of ±8°.

• Chrominance noise reduction

in

By providing a line adding mode
signal-to-noise ratio

Built

-in video processor

in

the

chroma system can be improved.

the chroma system, the

The video level, chroma level, set up level, hue level, system

subcarrier phase and

system sync phase can all

be adju

sted with

the

the built-in video processor.

Shaping

100

during

the

Unnecessary vid
selected

at

Built

-in

automatic

An

automat
automatically c
the VTR

so

to the cent

vertical blanking

eo

signals

in

any line unit and replaced by pedestal

advanced

ic advanced sync generator is self-contained and this

ontrols

the advanced sync phase which

tha t the phase

er

of

the correction range while the BVH-1000

and BVU-200A is being employed.

Thi

s means that there is no need

period

the vertical blanki

potent

sync

generator

of

the playback video signals

to

align the advanced sync phase

ng

peri

ial.

is

od

fed
is

brought

or

can be

out

BVU-

when cha nging over tapes.

Attachable

It

is also possible to

playback signals from· a h

input

adapter

connector

for

heterodyne

attach

eterodyne

color

VTRs

an

adapter (BK-2003) whi

col

or

VTR

(option)

without

into standard broadcasting signals.

ch

conver

a subcarrier

to

ts

1

-2

1-2. SPECIFICATIONS

r

1-2-1. General

Power requirements

Power consumption
Operating
Humidity

Weight

temperature

1-2-2. Video

Band

width

Signal

to

(unweighted)
Differential gain
Differential phase

K-factor (2T Pulse

Correction range

Residual error

Chrominance/Luminance

delay

noise ratio

& bar)

1-2-3. Input signals

Off

tape

video

Reference video

or

sync

and

subcarrier
Dropout compensator

reference signal

Remote in

* Off

tape

(video)

(pin 1, pin 2)
* DT-V (pin
* Off tape mode (pin 5)

* DOC pulse (pin

* Play

*REC
* Confidence mod e (pin 12)

*

n

connect

status

sync

3,

pin 4)

6,

(pin 8)

(pin 14)

pin

7)

100/120

AC
able

620W
0°C -40°C
10% -90% (non condensed)

40

kg (88 lbs)

±0.3 dB to

58dB
2%

48

/220/24

- 64 Hz

4.2

0 V ±10%, select·

MHz

20

1%
±2 H (without BK-2001)

±6 H (with

Color:
Monochrome : ±

20 nsec

NTSC
1

.0

1.0 Vp-p ±3 dB,

4.0Vp-

1.0 Vp-p +6,
Dropout pulse,

1000/1100) (Dropout: Low)
Hi

gh impedance

or

off tape

75 ohms (for BVU-200A, BVU-100)
High impedance
NTSC

1.0 Vp-p ±3 dB, 50 ohms
TTL
TTL

Off tape = Hi

TTL

TTL

Pla

y status = High

TT

L level, High impedance

TTL

Confidence = Low

TTL

n conn

BK-2001)

±2.5nsec

15n

scc

composite

Vp-p

p ±3 dB,

com

level, High impedance
level, High impe

level

level, High impedance

level, Hi

level, High impedance

ect

video, sync negati

±3

dB, 75 ohms

75 ohms, ON/OFF

75

ohms,

-3

dB, 75 ohms, ON/OJ:F

TTL

level (for BVH-

Rr

signal, 0.5 Vp-p

posite video, sync negati

dance

gh

(Dropout

= Low

gh

impedance

: low)

ON/Off

±3

ve

dB,

ve

*OT

mode (pin 15)

*Color

framing pulse (pin 16) TTL level, High impedan

* The

se

signa

ls

are the inputs from
(Multiple
tor vid

1-2-4.

Video-1 }
Video-2

Video-3

Advanced sync

Subcarrier (to U-matic only) 1.0 Vp-p ±0.2 Vp-p,
Remote
*

fH

*This s

co

nnec

eo input.)

Output

out

(pin 10, pin 11)

ignal is

signals

the

output

tor

TTL

level, High imp edance

Dynamic trackin

the

vid

eo

input

takes priority

1.0 Vp-p co
75 ohms,

1.0 Vp-p
sy

nc negative

0.7 Vp-p non-composite video
75

ohms

4.0 Vp-p ±0.8 Vp-p

composite syn

The same signal out with remote
TTL level, High impedance

s from the Multiple co nnector.

g= Low

Multiple connector.

mpo

site video

sy

nc negative

com

posite video

c,

75 ohms

1-2-5. Processor adjustment range

Output

video level

Chroma level
Set

up level

Hue

System sc phase

System sync phase
Video phase

DG

DP

±3

dB

±3

dB
0- 15 IRE
±15°
360° p-p
± 3 micro sec.
±

560

nsec p-p (280 nse

±8

%

±8

0

ce

of

the BNC connec-

75

ohms

c/s

tep)

in

1-

3

1·3. INSTALLATION INSTRUCTIONS

Dimensions

1

-----

r------------1

-

-42

4

__

l

•

LO

<O

N

'J

[

Installation location

1·3·1 .

Install

•

• Do

• Avoid installation in

• Avoid areas where high electric

• Avoid areas where

1-3-2. Installation conditions

• Ensure that a gap

• Do not bring cables

• Bear in mind

1·3·3. Pre·operational check list

the

ventilated.

not

source .

vibration.

found.

light, other

sun

nn

co

metal netting

Do

not
equipment
When mounting equipment into
2000,

BVT-2000

install

in a room

strong lights

ector

panel

of

the

install the BVT-2000 over any power supplies

which radiates heat.

leave a clearance o f

in

a l

ocat

with a high

dusty

areas

the

BVT-

2000

or flashes

of

at

least

and

any adjace nt surface.

or

any

the rea r panel ventilator.

following point

othe

at

least 3 ems between the units.

ion which

temperature or near a heat

or

areas which are subjected to

or

magnetic fields

will be exposed
of

30

ems is left between the rear

r objects

s when rack mounting.

the

same

light.

into

contact wi

rack below

is

dry and well

arc

to

or

the

to

be

direct

th the

other

BVT-

mm

J) Confirm

panel

2)

Check

3) Insta
conditions

Check

4)

5)

Open the front control panel and check that all the printed
circuit boards have been inserted correctly.
Check th
with

6)

Turn
resistors
with the instructions given lat er in th is manual.

that the

is

set

that

ll

the

the

at

the

board number (grip part).

the POWER switch

and switches

VOLTAGE SELECTOR

to th

e line volta

the

POWER switch

BVT-2000 in a rack

outlined above.

input

and o

utput

the

board location number (at

to

on

the connector

ge

of

your

area.

is

at

the Off'

or location

lines.

on,

and

set all the controls, variable

their proper positions in accordance

position.

whi

ch

the

bottom) tall

meets

the

ies

1·4

1-

3-4

. Operating precautions

1) Blinking

If

mally high level, then
under these condit ions
Immediately carry out the following inspection:

• Check for a high ambi

• Check the rear fan grille, and ensure

• Check the vent

• Check the installation location for abnormaliti

2)

Inserting and removing the printed circuit

As
boards. However, wh
necessary, observe the following i

• Always make sure

•

• Before turning on the power, check the position

of

the temperature inside

location.

If

POWER or

with dust.

I

f,

after checking and inspection for faults and malfun

tion

s,

the cause

po

inted, switch

Sony broadcasting services.

a rule , avoid inserting and removing the printed circuit

removing th e boards.
Wh

en inserting

number

(at

number (grip section), and always

boards for a second time.

the above instructions are

may be dama

INPUT

LEVEL

the

the

above lamps will blink. Operation

can

lead

ent

temperature.

il

ator fan to see if it is rotating properl

of

the temperature rise cannot be pin·

off the power imm edi ately and consult the

en

such an

that

the power is

the

boards, always check that their slot

the

bottom

of

ge

d.

lamps

BVT-

2000

to

equipment failure.

th

at

boards

•opera

mportant

the frame) tallies with the board

points.

off

insert in the proper

not foll

owed, the circuitry

rises

to

an abnor·

it is n

ot

blocked

y.

es.

tion is absolutely

when inserting and

of

the

1-4. OPERATION CONTROLS

Th

e switches and controls which are regularly used are a
the front panel. These are on the main panel where they are in view
at all times,
door.
The switches and variable resistors which seldom require adjustment
after
Access

1) Openi

c-

2) Opening

or

on a sub-panel where they are covered by a small

initial setti ng are located on the printed circuit boards.

to

these is

obtained

ng the control panel

the

connector panel

by

opening

the

panels as shown below.

Pc board s

ll

located

on

r

0

..:1

1-5

1-4-1.

Con~rol

panel

t------------------------

~--@

~-------

1NPUT

LEVEL

C>

c:J

Cl

INPUT

~-----

LEVEL

control, INPUT

----

--

~---------@SET

~--------

BYPASS C. N. R,

--Q)

LEVEL

---@VIDEO

---@)CH.ROMA

- OF

FTAPE\I

PHA

PRESET switch, INPUT

--@HUE

SONY

DIGITAL

TIME BASE CORRE

SE-

DElAV

POWER

switch,

POWER

LEVEL

lamp

lamps

control, VIDEO PRESET switch

control, CHROMA PRESET switch

UP

control, SET

UP

PRESET switch

control, HUE PRESET switch

CTOR

01fUCT

COLOR

f

<i)

NORMAL/BYPASS switch, BYPASS

@ CNR ON/OFF switc

@

DG

control,

@

DP

con

@V

IDEO PHASE control,

DG

trol, DP

@ SYSTEM SYNC

@ LOCAL/REMOTE s

h,

CNR lamp

PRESET switch----------_,

PRESET

s

witch-

VIDEO

PHASE control, SYSTEM

witch,

REMOTE

-ou

u1

-

lamp---

______

-------

PHASE PRESET

lamp----

~

_ _,

switch-----

SC

PHASE

--

--~

control-----

-

--------

~

~

~

@)DIRECT

COLOR/U-matic switch, DIRECT COLOR/U-matic lamp - -

· @>OFF TAPE V-PHASE lamps

_________________________

1-6

-------

--'

....,

r

c

G)

POWER switch, POWER lamp
Wh

en the POWER swit

up and power

inside

the

BVT-2000 should rise to

(becau

se

of

of the.

a ventil

malfun

and INPUT LEVEL l
cause
or LEVEL INPUT l

@ INPUT LEVEL

PUT LEVEL lamps

MANUAL:

• When the left red lamp lights up, this means
level is l

• The ce
setting.

• The right red l
high level
Detection
n

ot

PRESET: The TBC input amp gain

VIDEO control, VIDEO PRESET switch

®

MANUAL: Th

PR

ESET:

The

the A/D converter's input level.

ow

and that

nter

green lamp lights up

compo

of

on the signal content.

level regardless

and
TBC ou
range of
Th
level regardless

ch

is turned

is

supplied

ato

r breakdown, for instance), the POWER

amps

ction

as described in "Blinking

amps"

under secti

control,

the level depends

is

INPUT LEVEL PRESET switch, IN-

INPUT LEVEL co

the

amp

shows

nent may

enables

on,

the

POW

to

the circuitry.

will blink

S/N ratio

to

that there is a possibility

be

clipped due to overloading.

on

of

the position

the

@ VIDEO-I, @ VIDE0-2

If

an

unu

sually high level

on

and off. Search for the

on

1-3.

ntrol

can be used to set

is

unfavorable.

indicate the best possible

the VTR's sync level and

.

is

set to the neference

@ VIDE0-3 (described from now as the

tput)

e TBC

video level

±3

dB.

out

put video level is set

of

to

be adjusted within a

the position of this control.

© CHROMA control, CHROMA PRESET switch

MAN

UAL:

This co

ntrol allows the TBC output

to be adjusted with

Th

PRESET:

@ SET

@ HUE

UP

MANUAL: This control allows the TBC

PRESET: The TBC out

cont

MANUAL: This

PRESET: The T

e TBC output
reference level regardless
control.

control,

SET

UP PRESET switch

to be adjusted with
units

of

the reference leve

ence level regardless

rol, HUE PRESET switch

contro

(bur

st and chroma relati

ed

across a range

BC output

level

re

gardless

in

a range

of

chroma level is set to the

in

a range from 0 to 15 I

put

set up level is set to the refe

of

the

l allows the TBC output hue levei

of±

15° .

hue level is set

of

the

±3 dB.

of

the

output set up level

l.

positi

on

ve

phase) to

to

position

of

0 NORMAL/BYPASS switch, BYPASS lamp

NORMAL: A time-compe nsated o

BYPASS: A bypassed outpu

ou

tpu t.

and the BYPASS la

@ CNR ON/OFF switch, CNR la

ON:

The

vid

eo

signals are Y/C separated, and only

chroma signal is line added

Of'f'

averaged.
by 3 dB.

: The vid

The

chroma S/N ratio is thereby improved

eo

signal bypasses -t

utput

appears

t appears in the TBC o

mp

comes on.

mp

to

the I H prior signal and

he

above processing system.

ER lamp lights

the temperature

of

POW

ER

that

the input

that

the

of

this

contro

to

the refere nce

chroma level

position

of

of

this co ntrol.

be

adjust-

the reference
this co

ntrol.

in

the TBC

utp

this

RE

r-

ut,

the

DG

control,

DG

®

MANUAL: This control is used to linearly compensate the

PRESET:

DP

control, DP PRESET switch

MA

NUAL: This

PRESET: The differential phase bypasses

PRESET switch

differential gain
of ±8%.
The differential gain bypasses

ing system.

con

differe

nti

range

of

in

g system.

of

tro l is used

al phase

±8°.

the

TBC

to

linearly compensate

of

the TBC ou

output

the

th

@ VIDEO PHASE control, VIDEO PHASE PRESET switch

to

move

MANUAL: This control is used

PR

ESET:

the TBC
step = 280 nsec).
The

ce

output

TBC o

utp

ut video phase

level regard less

within a range

of

the

the

of

is

set to the referen-

position of

@ SYSTEM SYNC PHASE control, S_YSTEM SC PHASE control

l.

These two controls are used when you want
SYNC phase and the

to the BVT-2000

For

instance, th ey can be used to bring th e ou

with the stati
TBCs are being used to produce fades, lap-dissolve and special
effects.

• The SYST

• The SYST
There is usua
when performing ord inary maintenance work after the
BVT-2000P has been installed in the studio ,
In cases like this, the phase may under
they are touched in error
so by partia
variable range
and SYSTEM SC PHASE controls can
one-tenth
adjusted with the vrs on the ST-8 printed circuit board.

ll

of

SC

phase

of

the TBC

's

reference inpu

on's

reference, or when two or more VTRs and

EM

SYNC PHASE adjustab

E.M

SC PHASE adjustable range is 360° p-p.

ll

y virtually no need to move these two co ntrols

y remodeling the

of

the

contro

their normal range. The remaining nine-tenths are

t.

if

the variation range is

ST~8

l panel 's SYSTEM SYNC PHASE

outpu

tput

le range is ± 3 µser.

etc

go

a great change when

printed circuit board, the

be

reduced to

@ LOCAL/REMOTE switch, REMOTE lamp

LOCAL: All the controls and switches are operated

REMOTE: Operation

front panel

sw

itches
for TBC applications regardless
of
f

ront

Th

e REMOTE lamp comes on.

of

the BVT-2000,

is

provided by

on

the

optiona

l remote control un

the controls and switches

pane

l.

the

on

@ DIRECT COLOR/U-matic switch, DIRECT COLOR/U-matic

lamp
DIRECT COLOR:

U-m

at

ic:

Set

the switch to this positi
combining
color VTR (such
The DIRECT COLOR lamp comes on.
Set the switch
combining the BVT-2000

VTR (such as Son
The U-matic lamp comes on.

the

BVT-2000 with a direct

as

Sony's

to

this positi

y's

BVU-200A

across a ran

above proc ess-

tput

across a

e above pro cess-

video phase

900

nsec p-p (1

this control.

to

adjust

the

t with respect

phase in line

.

too

great and

about

on

the

controls and

of

the position s

the BVT-2000

on

when

BVH-1

100).

on

when

with

a U-matic

or

100).

ge

the

of

it

1-7

@

OFF

TAPE V-PHASE

When producing time base 'correction ranges
H,

it

is first necessary to have

boards, respectively. (Only

ode

l and the oth

m
In addition, the phase
advanced 4 H
of

the

TBC

outp
with these values, there is no change in
tion

range

correc

at

tion

shifts and so it appears

lamps

of

±2 H and

one

or two 8-line memory

one

board is provided with the

er

boards are available as opti

of

the VTR playback

or

8 H, respectively, as average values ahead

ut phase.

If

the phase adv

the width

4 Hp

-p

and 8 Hp-p,

but

the ce nter value

that

ons

outp

ance

does not

of

the correction range is

correspondingly narrower.
This point is impor

be

made as wide as possible such as with dynamic tracking

to
playback

or

tant especially when the correction range is

rolling tape playback. If the playback
phase shifts fro m the correction range, this will be translated
into a shift in the picture w

ith

the TBC

output

in the vertical
direction.
The

OFF

TAP

E V-PHASE lamps enable the VTR playback

output

phase to

ahead

of

ADVANCE: Lights up when the VTR o

I

N:

DELAY: Lig

be

checked

the TBC outpu

advanced
Lights up wh
co

rrectly

ht

s up when

t phase.

too

far ahead.

pos

itioned.

to

see if it is pr

en

the

the

ope

rly advanced

utp

ut phase has been

VTR output

VTR

outpu

delayed.

When t

he

VTR o

utpu

signal having

BVH-500 or BVH-1100 is being e
t phase is designed

to

be

sent from

the

to

TBC

be

correct

to

mpl

without

theVTR.
Therefore, whe n these VTRs are being used and the AD­VANCE
on an osc
sufficie
whether the average

or

the DELAY lamp lights up, it is necessary to check

ill

oscope whether the TBC correction range

nt

for the fluct uation in th e VTR o

VTR

out

put

phase is centered in the

utput

correctio n range.

If the phase is n
Furthermore, the

some

action

ot

correct, adjust t

VTR

output

he

switch inside

phase will

the

not

be correct unless

is taken, when the BVH-1000, BVU-100
BVU-200A is being operated. Therefore, it is necessary
an

advanced sync signal from the TBC to

the vertical sync

of

the VTR

with

this signa

the

VTR and app

l.
This particular time base corrector has a built-in circ uit which
automatically contr
above VTR playba
of

the correction range.
necessary
co

nventional time base corr

to ali

ols the advanced sync phase so that the

ck

phase is bro ught p

Thi

s means that it is no longer

gn the advance sy

rope

rly into the center

nc

phase as it was with

ectors when changing th e tape.

(Manual operations are also possible using the internal selector
switch.)

BK-2001-)

ut

must

tally

the correc-

of

the

output

phase is

t phase is

oye

d, the

a special

phase

or

VTR.

or

to

send

±6

be

is

ly

1-8

4

1-4-2. Connector panel

CD

OFF TAPE VIDEO (to

be

corrected)-

-----

--

----

~

@ DOC PULSE (dropout pulse) -

@

RF

(off

© VTR

@

FRAME

@

PLAY

tape) _

(Multiple

PULSE

STATUS

____

connector

------

---

for

--

---

________

BVH-1100)

--------

-

------

-------

---------

___

----.

----.
_ _

-~

..........,

-.-.-----.

@ AC

(max

OUT

200VA)

unswitched

@)

VIDE0

@

VIDE0

@

VIDE0-3

@ NON

@

SC

(jittered,

@

ADV

@ SPARE

-1 (corrected video)

-2 (corrected video)

(corrected video)

COMP/COMP

to

SYNC

----

switch

U-matic type

(to

U-maticor BVH

-------

VTR)

type

VTR)

-

'------

-t--'

'------------

'---------

.____ ______

'------

'-----

1-9

'--------

----

---------

---

__

-----

--------

______

'--

@

COMP

----

@COMP

0 VOLTAGE

-------

VIDEO (reference) In -

@

75D

@

SC

(reference) In - Out

--@

75 D ON/OFF

SYNC (reference) In -

@ 75

S1 ON/OFF switch

_ @ REMOTE In -

SELEC

@AC

ON

/OFF switch

TOR

sw

IN

Out

itch

Out

Out

Use

the

CCY

cables suppli

between the VTR and TBC. All the

con

ne

ctions employ BNC connectors.

• Loop-through connectors are provided for Refe

ed

with the TBC for the conn

other

input and

output

ren

ce COMP
VIDEO, Reference SC, Reference COMP SYNC, and so when
this loop-through feature is employed,

75n

ON/OFF

switches

OFF.

In

other

turn

uses,

the

turn

@,

the switches

ON.

By

•
VIDE0-3

selecting

the

output

@ NON COMP/COMP switch, the @

can be turned in

to

composite video or

non-composite video.

or

• Referen ce COMP VIDEO, Reference SC,

ge

required to
Sel

ect

GENERATOR 1

n lock the TBC

the REFERENCE SELECT switch OQ the SYNC

bo

ard to lock at REFERENCE VIDEO

to

the

external reference signal.

COMP SYNC is

REFERENCE SYNC.
A sufficiently low time base error is required for the

signal

s,

and if this error is high, the proper

BVT-2000 will n

When the
ge

nera

tor

ot

be displaye

sig

nal is not connected to the reference input,

inside the BVT-2000 au

d.

11erfo

rmance

tomat

ically becomes the
reference.
When using the sync generator inside the BVT-2000

ty

the refere nce signal, its frequency stabili
crystal oscillator
board. For normal use the stab

temperature range

on

the

SYNC GENERA TOR 1 printed circuit

il

ity

of

0°C

to 40°

C.

If

is determined by the

is

about

this is n

to

30 ppm across a

ot

sufficient for the
intended operation, replace the crystal oscillator with a
having the required stab

ili

ty

or app

ly

a stable reference signal

from an external source.

ect

ions

signal

@, @

or

at

ge

n-lock
of

the

the

sync

generate

unit

INPUT

/OUTPUT

CONNECTOR

INPUT

CD

OFF

TAPE

corrected)

(3)

DOC

PULSE

pulse)

@RF (off

@)

@
@
@COMP VIDEO

@sc

@COMP SYNC

@R
@

OUTPUT

@

@
@

@SC

@

@

tape)

VTR

(Multiple

for

BVH-1100)
FRAME
PLAY

IN -Out

In -Out

ACIN

or

PULSE

STATUS

(referer.ice) IN-O

EMOTE

VIDE0-1
VIDE0

-2 (corrected video)

VIDE0-3

(jitt

ered,

type

VTR)

ADV

SYNC

BVH

type

AC

OUT

connector

VIDEO

(dropout

connect

(reference)

(reference)

In -Out

(corrected

(corrected

to

U-m

(to

U-m

VTR)

specifications

(to

be

or

ut

video

)

video)

atic

atic

DESCRIPTION

BNC, 1

Vp

-p,

BNC,

TTL

level, High

impedance
BNC, 0.5

BNC,
BNC,
BNC

On/Off

BNCs, 1

On/Off

BNCs, 4
On/Off

BNCs, High
3-pin

BN C, 1
BN C, 1

Non com

video, 1

BNC, 1

BNC, 4

On/Off Switch

max

Vp-p,

TTL

level, High impedance

TTL

level, High impedance

s, 1 Vp-p,

Switch

Vp-p,

Switch

Vp·p,

Switch

imp

AC

connector

Vp-p,
Vp-p,

posite

Vp-p

Vp-p,

Vp-p,

200VA,

75

ohms

75 ohms

75

ohms

75

ohms

75

ohms

edance

75 ohms
75 ohms

video/

75

ohms

75

ohms

unswitched

composite

@ SPARE

Power

connections

Connect the supplied power cord
To set the input voltage (100/120

th

e

Ci)

loosen

dr

iver. Tight

A power in excess

OUT co nn ecto

VOLTAGE SELECTOR's lock screw with a screw-

en

aga

in after selecting the correct voltage.

of

200VA cann

r.

1-10

BNC

to

the @

ot

/220/2

40 V ±10 %, 48-

be

fed

AC IN.

ou

t from the @

64

Hz),

AC

1-4-3.

Printed circuit board

OJO

"C

i'\

'

-t

I\,)_

oo

~z

OJQ

i'\ -c

'

l\,l_

oo

8z

-t

@CABLE

CD

AUTO/B&W switch

C OMPENSATI

ON

switch

1

-

en

"C

)>

Jl

m

OJ

0

)>

Jl

CJ

-

3 4 5 6 7 8 8 8 9

2

- -

"C

en

Jl

-<

0

z

()

()

m

Cl

en
en

0

z

Jl

m

Jl

)>

-t

0

~Rl

~

"C

en

Jl

0

r\J

IV

00

-~

~
~

OJ

CJ

-

Jl

m

x

OJ

CJ

u,

§]-

~

- -

0

Jl

0

"C

0

c

-t

()

0

s:

"C

m

z

en

)>

-t

0

Jl

CJ

'.2

I\,)

en

-<-

z

()I=

Cl

m-

z

m

Jl

)>

-t

0

Jl

I\,)

I-

>--

~

.

I\,)

00

~

~

en

m

p

c

m

z

()

m

Jl

en
p

w

p

P,_

p

~

r

----'-

~

-

-

00 00

r

z

m

s:

m

s:

0

Jl Jl

-<

s:

-<

w w

r

z

m

s:

m

s:

0

-<

s:

-<

-

)>

CJ

()

0

z

<

m

Jl

-t

m

Jl

)>

CJ

cXi

10

-

en

c

OJ

()

r

0 r

()

i'\

()

i'\

w

11

-

s:

)>

2 m

()

0

()

i'\

()

::"

(11

-

i

12

:x:

m

-t

Jl

0

CJ

-<

z

m

()

0

r

0

Jl

~

r\J

~-

13

-

2

"C

c

-t

<

CJ

m

0

L-

~

<

~

W4

s

0 m

SW

SET

3
5
7

2

SW1

SW

=-SET

=

c:=J

SW

SET

1
2
3
4 0
5

6

7

IV

-1

COMPENSATION

O(m)
5

10

25

IV

-1

SWl,2

at

the

same

position

.

COMPENSATION

-75

ns

- 50

-25

+25

+

50

+

75

'-+-If----+-+-+--------@

'-+---+--+-+--------'0'

L----t--+-+--

'--+-+-------@V

"-+-

'------

@@

tt

...__t

_

===============--SYSTEM

'--

ST-8

------+-

---

@CO

~@

~(?)

~--@

~

@ADVANCE

--

---@

--@

---@

· SYSTEM SYNC PHASE

I

'------

LOR FRAMI

COLOR

DOC

ON

V

BLANKING

NG

ADJUSTMENT vrs & lamps

FRAMING

NORMAL/ADJUST

/OFF switch

LINE SELECT switches

LOCK MODE lamps

ADVANCED SYNC

AUTO/MANUAL

ADVANCED SYNC PHASE control

D SYNC PHASE IN l

amp

REFERENCE SELECT switch
HD

SIGNAL

PICK

UP

D SIGNA L PICK UP

SIGNAL

GND

BURST LEVEL & PHASE controls

SYNC LEVE L control

Use these vrs
variable range
controls

on

between

the

only

control

when

these vrs

panel.

dividing

and

vr}J

SC

PHASE vr

@ Y/C

---

switc

switch

the
the

DELAY

© DIRECT /

h~

lamp

Crystal
generated
ence signal.
(If
stability

it

COMPENSATION switch

oscillator

an oscillat

in

this

PROCESS

SG-18

high

-stab

or

is

to

be used,

space.)

for

ility

with

switch

internally

refer-

a h igher

mount

1-

11

G)

AUTO/B&W

AUTO:

B&W:

switch

(13.

INPUT

VIDEO

board)

Thi

s swit ch detects if burst

is

playback signals, and automatica

to col

or

or black-and-white

This sets the whole system

mode

to monochrome

present in

ll

y sets the system

.

tion and the write clock is controlled

SYNC.

@

CABLE

COMPENSATION

switch

(13. INPUT

VIDEO

This switch serves to compensate for deterioration in the

quen

cy

respon

se

fre

BVT

-2000

. Compensation for cable lengths

25

me

ters corresponding to pins 1, 3, 5 and 7

caused by the cables between the VTR and

of

available.

@

Y/C

DELAY

board)

Thi

s switch serves

difference produced in the VTR

±

IO

nsec range.

Th

e Y

COMPENSATION

to compensate for the Y/C group del

/C

delay compen sat ion makes u

switch

(13.

INPUT

or

BVT-2000 across a

se

of the all-pass
network, and the delay time of the chroma signal can be
selected wi
positi

The

-50,
switch pin position l, 2,

©

DIRECT/PROCESS
board)

This switch

DIRECT: Set the switch

PROCESS: S

@

COLOR
& lamps

@

COLOR

switch

This

on

del

th respect

of

this switc

ay

time

to

the Y signal

h.

in

the chrom a band can be switch ed t o - 75 ,

- 25, O, +25, +50, and +

3,

4, 5, 6 and 7.

switch

Option

BK-2003

is

used only for U-matic VTRs.

col

or

VTR (such as Sony's BVU-

BVU-J

00)

connector

et

, which is provided

for Y

to this position when a hetero

VTR (such as Sony's

have an SC input conn
is

connected.

FRAMING

FRAMING

& la

mp

con

tro l secti

ADJUSTMENT

NORMALiADJUST

on

consists

in

accordance with the

75

nsec corresponding to the

(12.

HETERODYNE

to

this positi

on

when a heterodyne

with

/C

int

erleaving, is connected.

of

V0-2860)

ector

vrs

two

, which does n

for Y/C interleaving,

(7. SEQUENCER

board)

}

variable resistors and

two light-emitting diodes. Adjust this section when the col
phase must be repeated with a high level
example, edi ting accur ately a t

ape

which is recorded with color

of

precision, for

framing servo, or when composing video animation.

Turn the

li

ghts up) and adjust the

two

@ NORMAL/ADJUST

CD

LEDs lig

ht

CD

up. After adjustm

sw

itch to ADJUST (LED

two variable resistors so th

ent,

be

sure to set th e

@ NORMAL/ ADJUST switch to NORMAL position. (The 3

LEDs go

If

PHASE
resistors, turn the
and make sure that the two LEDs
up, read

Q)

DOC

ON:
Off':

@ V

TOR

8 circuit switches

By

any
the
li

off

.)

the SYSTEM SYNC PHASE co n

control

arc turn

ed

@N

ORMAL/ADJUST switch to ADJUST,

afte

r ad

tro
just

li

ght up.

just the two variable resistors.

ON/OFF

BLANKING

2 board)

setting switch 2 and switch 3

li

ne in the vertical blanki

numb

switch (6.

Thi

s is the normal pos ition.

Thi

s turns the

LINE

SYNC

GENERATOR

dropout compensa

SELECT

switches (6.

to

ng period

er

of

the board, and so these are used to shape the

nes and set them to the pedestal level.

l and the SYSTEM SC

ing these two variable

If

they

2 board)

tion off.

SYNC

ON, it

is

possible to select

which corresponds to

the

by

0, 5,

10

of

SW4

VIDEO

COLOR

200A or

an SC

dyne co

at

do not

GENERA·

VTR

opera-

the H

board)

and

ay

input

lor

ot

or

the

light

LOCK

MODE

®

Th

e appropri

lamps (3.

ate

signal being supplied to

ER

NAL).

INT

ADVANCED
ADVANCED
ADVANCED

SYNC
SYNC
SYNC

AUTO: This is used

with
co

ntr

is

that the playbac k video phase is brought to the

nt

ce

MANUAL: This is used to allow the advanced sync phase to

controll

SYNC

GENERATOR

lamps illuminate

th

e BVT-2000 (COLOR/SYNC/

AUTO/MANUAL

PHASE

control

PHASE

IN

to compare

the

VTR playba

to

show the

lamp 1 board)

the refere nce vertical sync

ck

1 board)

type of

reference

switch

} (3.

SYNC

GENERATOR

vertical sync phase, and

ol the advanced sync phase automat

er

of

the window.

ed with the advance sync phase control

ically

so

be

trimm er vr3. (Adjust so that the ADVANCED

SYNC PHASE

co
on the fro

•

Us

e the MANUAL mode when there are problems with the

se

response in the AUTO mode.

ri

REFERENCE
board)

This switch is used
COMP VIDEO, SC,

automatica

lly set wh

position of this switch is n

HD

SIGNAL

@

VD

SIGNAL

SIGNALGND

The

se

can be used for the external sy

ll

oscope, if so required, when checkin g the wave-forms

osci

rresponds

SELECT

PICK

UP }

PICK

UP (3.

IN lamp

to

the

nt

panel.)

switch (3.

to

set the BVT-2000's reference signal to

or

COM

en

a signal which corresponds to the
ot

connecte

lights up . This lamp

OFF

TAPE V-PHASE IN lamp

SYNC

GENERATOR

P SYNC. Internal lock is

d to the connect

SYNC

GENERATOR

nc

or

1 board)

signals of the

1

panel.

of

the TBC sections.

@

BURST

@

LEVEL

These are used

phase

of

the

output.

SYNC

LEVEL control

& PHASE

to

controls

(4. PROCESSOR board)

adjust finely the burst level and the burst

(4. PROCESSOR board)

This is used to adjust finely the sync level

of

the ou tput.

1-12

1·5. SIGNAL CONNECTIONS

The two most common operational modes

The required connections are clearly shown in each case.

Observe the advice and information concerning connectors and the printed c
boards".

Connec

tions

with

direct

color

VTR

of

use are shown in the following d iagrams.

(BVH-1100)

Reference

ir

cuit board switches given in secti

on

1-4

-3

"Printed circuit

Connections

BVH-1100

TBC

(Mult

with heterodyne color

REF

VIDEO

iple connector)

VTR

(BVU-200A)

BVT-2000

~

(

CCV cable

COMP

VIDEO

(Reference)

VTR (Multiple connector)

-

VIDE0

-1

VIDE0-2

0-3

}

V

IDE

(Output)

, ,

Reference

BVT

-2000

BVU-200A

VI

DEO

OUT

c

SY

NC IN

SC

IN

"

RF(OFF

TAPE)

-

- COMP V IDEO (Reference)

OFF

TAPE

VIDEO IN

ADV

SYNC

SC

(to

U-matic)

RF

(DOC

control)

VIDE0-

1 }

V

IDE

0-2

VIDE0-3

(Output)

.

,.

1-13

1·6.

OPTIONAL

1-6·1. Dynamic tracking memory

When

com

bining the BVT-20
tracking playba
plug o

ne

of
Whereas the correcti

board, two boards
to yie ld

Using the M
containing a great deal

recorded on a p
phase sh ift whi ch is produced with a correcti
be eliminated.

opt

BVT-2000) into slot

prop

er pictures

EM

ADAPTOR

00

ck

(guard ba

ional memory

ex

OR Y boards is effecti

ortab

nd

noise-less playba ck), it

board

numb

er 8 (16).

on

range is 4 Hp-p with o

pand th

is

with

dynam

of jitter

le U-matic while

AND

board

with the

(same as MAIN MEMORY board

range to 12 Hp-p.

ic tracking playback.

ve

when playing back a tape

(for example, a tape which has been

on

ACCESSORIES

BK-2001

BVH-1

000

for dynamic

is necessary to

ne MAIN MEMORY

It

is also po ssible

the move

on

ran

).

The vertica l

ge

of 4 Hp·p

can

1-7. BREAKERS

When

no

power is supplied to

panel as

in

the photo

If

the breaker s are
after power is supplied, inspe
nothing appears wrong, contact the Sony broadcasting service

below and inspect the two breakers.

OFF,

the

BVT-2000,

set them

to

ON but

ct

the power supply and

ope

n the conn

if

they return to OFr

the

voltage. If

ector

s.

1-6-2. Heterodyne color

Use this adapter when converting the playback signals
h

etero

dyne color VTR
connector into standard broadcasting
possib le
base corrector with microcircuits even when a VTR, which is
provided with a subcarrier input connector,
The

HETERODYNE C
mark

f or the above instances, set the DIRECT/ PROCESS switch
board
DIRECT.

to

ret

urn

adapter

is configured as a single printed circuit

ed

by slot number 12

to

PROCESS, and for a

the

OLOR), and it

VTR

color

(V0-2860)

subcarrier signal to

on

the time base correc to

ll oth

wit

signals~

is inserted

er

instances, set the swit

processor

hout

the

is

BK-2003

a subcarrier inpu t

or when it is

VTR from the time

being employed.

into the

r.

board

of

not

(called

position

on the

ch to

a

-

Two breakers

1·

•

14