I-den Ivt-7 ntsc User manual

ADE

CORPORATION

NSTRUCTION

MANUAL

I.

NO.

TB-

Technical

Bulletin

for

model:

IVT-7

DATE:

9/20/90

SUBJECT:

HI-8

Modification

in

units

serial

numbers

10050400

and

higher.

This

unit

has

been

modified

to

accept

HI-8

and

be

adjustable

in

Y/C

delay.

When

using

in

HI-8

format,

make

sure

input

select

Switch

is

in

YC

and

that

the

HI-8

switch

is

in

HI-8

position.

©

Pagel6

3-2

FRONT

OF

PRINTED

CIRCUIT

BOARD

The

front

panel

of

IVI-7

will

be

altered

accordingly

as

below:

,

AUTO

INPUT

SC

IMPEDANCE

FREEZE

SELECT

INVERT

PHASE

MOD

LEVEL

HIGH

75

ON

OFF

VIDEO

YC

ON

OFF

LoGAL

Ye

[BAL

eee

Seopa]

oo

0

@

VIDEO

SETUP

CHROMA

§

OUT

7

LEVEL

PHASE

LEVEL

.

lo

©

Ye

Hig

ab

-

}

OFF

ON

OFF

VIDEO

PHASE

H,

PHASE

Y/C

DELAY

DOC

V.BLK

EN

CORPORATION.

I.

DEN

VIDEOTRONICS

CORPORATION

CHANGES

in

IVT-7

INSTRUCTION

MANUAL

OPagel1

2-3-1

VIDEO

IN

additional

information:

Products

after

serial

No.10050201

have

a

5.5MIlz

frequency

bandwidth

apart

from

the

sub-carrier

filter.

If

there

is

a

large

variation

of

the

color

signal

at

the

output

video

signal

of

the

IV¥-7,

adjust

the

characteristics

of

the

sub-carrier

filter.

OPagel2

2-3-2

YC358

IN

additional

information:

A

Y

signal

input

impedance

selection

switch

is

installed

at

the

front

of

the

PCB

in

products

after

serial

No.

10050101.

Make

sure

this

switch

Is

set

to

75

ohm.

OPagel3

2-3-3

DUB

IN

additional

information:

A

Y

signal

input

impedance

selection

switch

is

installed

at

the

front

of

the

PCB

in

products

after

serial

No.

10050101.

Set

it

so

that

it

matches

the

DUB

Y

output

impedance

of

the

VIR.

OPagei6

3-2

FRONT

OF

PRINTED

CIRCUIT

BOARD

The

front

panel

of

IVI-7

will

be

altered

accordingly

as

below:

AUTO

INPUT

SC

BURST

IMPEDANCE

FREEZE SELECT

INVERT

PHASE

MOD

LEVEL

|

REMOTB

[BAL]

HIGH

75

ON

OFF

VIDEO

YC

ON

OFF

LOCALS

p=

po

Poe

a

Gx]

fe]

fey

fos]

[]

[|

__

0

oO

o

0

VIDEO

SETUP

CHROMA

S

OUT

LEVEL

PHASE

LEVEL

el

le|

aD

Cod

oF

OFF

ON

OFP

VIDEO

PHASE

H.

PHASE

Y/C

DELAY

DOC

—*V.BLK

additional

information:

@IMPEDANCE

SELECT

WIGHN/750hm

(after

S/No.

10050101)

This

switch

is

for

switching

the

Y

input

impedance

between

YC

input

or

DUB

Input.

@BURST

LEVEL

This

adjusts

the

burst

level

of

VIDEO

OUT

and

S

OUT.

O

Pagel8

Current

entry

In

IVT-7'Hanual

reads:

@®CHROMA

LEVEL

VIDEO

OUT

(Standard

position

@

)

llowever

customers

should

note

the

Hanual

now

reads:

@®CHROMA

LEVEL

(standard

position

(@

)

(CHROHA

LEVEL

refers

to

the

chroma

level

of

the

Video

Output

and

YC

Output.

)

Current

entry

in

IVI-7

Manual

reads:

YC

OUT

(standard

position

@

)

However

customers

should

note

the

Manual

now

reads:

@®S

OUT

LEVEL

(standard

position

(@

)

(S

OUT

LEVEL

refers

to

YC358(S-VHS)

output

level)

O

Page20

3-3

REAR

PANEL

The

rear

panel

of

IVI-7

will

be

altered

accordingly

as

below:

Vi

Video

yY/C_In_

Out

In

4

7

[|

=

©

Oe)

('

4

l

_|

Gen-Lock

(4Pin

or

7Pin)

In

O

Page25

(1)

Noise

reduction

additional

information:

Products

after

serial

No.

10050201

have

high

VIDEO

INPUT

bandwidth

characteristics.

-

Because

YC

separation

is

carried

out

in

the

SC

TRAP,

the

chroma

signal

is

insufficiently

removed

from

the

Y

signal.

So,

by

using

a

circuit

to

reduce

noise

in

this

Y

signal,

chroma

components

are

completely

removed

from

the

Y

signal.

Therefore,

VR10

sets

the

voltage

at

JP14

to

+0.12~+0.14V

with

respect

to

the

voltage

at

TP17.

OPage27

SPECIFICATIONS

Current

entry

in

IVI-7

Manual

reads:

freq.response

Composite

-3.0MhzZ

-3dB

However

customers

should

note

the

following

improvement

in

specification:

Freq.response

Composite

-5.5MNHZ

-3dB(Except

SC

TRAP)

DIGITAL

TIME

BASE

CORRECTOR

Nee

IVT-7

INSTRUCTION

MANUAL

Table

of

Contents

SECTION

1

INTRODUCTION

------------------------

2

1-1

GENERAL

DESCRIPTION

-------------------

2

1-2

SPECIFICATIONS

------------------------

2

1-3

FUNCTION

------------------------------

4

1-4

STANDARD

CONFIGURATION

----------------

6

1-5

ACCESSORIES

---------------------------

6

SECTION

2

INSTALLATION

------------------------

9

2-1

UNPACKING

AND

INSPECTION

---~-----------

9

2-2

INSTALLATION

--------------------------

9

2-3

SYSTEM

CONFIGURATION

------------------

10

2-3-1

VIDEO

IN

(VHS,Betamax,...)

-------

11

2-3-2

YC443

IN

(S-VHS,...)

-------------

12

2-3-3

DUB

IN

(U-MATIC,

VHS,...)

--------

13

SECTION

3

OPERATION

---------------------------

14

3-1

FRONT

PANEL

---------------------------

14

3-2

FRONT

OF

PRINTED

CIRCUIT

BOARDS

-------

16

3-3

REAR

PANEL

----------------------------

20

SECTION

4

OPERATING

CONSIDERATIONS

------------

25

SECTION

1

INTRODUCTION

1-1

GENERAL

DESCRIPTION

The

IVT

7

is

a

small

but

multifunctional

digital

time

base

corrector.

Because

it

incorporates

a

frame

memory,

it

can

be

used

to

synchronize

with

reference

Signals

the

recorded

signals

of

a

VTR

which

has

no

input

terminal

for

external

synchronizing

signals.

Therefore,

a

VHS

VTR

or

the

like

can

be

used

fora

system

using

a

video

mixer

or

switcher.

Acceptable

input

signals

are

composite

video

Signals

as

well

as

YC358

and

DUB

signals.

Both

U-MATIC

DUB

and

VHS

DUB

signals

are

acceptable.

For

connection,

see

Section

2-3.

Inputting

YC358

or

DUB

signals

provides

a

high

resolution

of

5.5

MHz

results.

The

functions

of

this

equipment

are

summed

up

under

Section

1-3.

If

there

is

any

point

you

want

to

have

clarified,

please

contact

us.

1-2

SPECIFICATIONS

(1)

Video

input

signals

Composite

video

Y:1.O0Vpp

75

ohm

YC358

Y:1.0Vpp

75

ohm

(4

or

7PIN)

C:0.286Vpp

75

ohm

(burst

level)

U-DUB

Y:1.O0Vpp

75

ohm

C:

Composite

video

VHS

DUB

Y:1.0Vpp

75

ohm

C:

Composite

video

(2)

GEN-LOCK

input

signal

BB:

0.45Vpp

75

ohm

or

through

out

or

Composite

video:

1.0Vpp

75

ohm

or

through

out

(3)

RF

signal

0.2-2.0Vpp

75

ohm

(4)Video

output

signal

Composite

video-l

1.O0Vpp

75

ohm

Composite

video-2

1.O0Vpp

75

ohm

YC358

Y¥Y:

1.0Vpp

75

ohm

C:

0.286Vpp

75

ohm

(5)

Black

burst

output

signal

0.45Vpp

75

ohm

(6)

Internal

processing

Component

(7)

Sampling

frequency

Y:

13.5

MHz

C:

6.75

MHz

(8)

Quantization

Y:

8

bits

C:

8

bits

(9)

Frequency

characteristics

Y:

5.5

MHz

-3

dB

(10)

DG,DP

2%,

2

(11)

Waveform

characteristic

1%

(

In

case

of

Video-in,

3%)

(12)

S/N

08

dB

1-3

FUNCTION

The

principal

functions

and

features

of

this

equipment

are

as

follows]:

(1)

Freeze

function

In

addition

to

frame

freeze

and

field

freeze

from

the

front

panel,

there

is

an

auto-

freeze

function

which

freezes

and

outputs

the

image

immediately

preceding

the

stoppage

of

input

signals.

This

auto-freeze

function

can

be

turned

on/off

at

the

front

of’

the

printed

circuit

board.

(2)

ACC

function

This

is

to

detect

the

burst

level

of

input

signals

and

automatically

controls

the

chroma

level.

(3)

Chrominance

signal

line

shift

function

Chrominance

signal

line

shifts

which

may

occur

ina

VHS

VTR

or

the

like

can

be

corrected.

This

correction

can

be

made

within

the

range

of

-1H,

OH-,

+1lH,

+2H

by

moving

the

jumper

of

Jl

on

the

digital

circuit

board.

For

how

to

take

out

the

digital

circuit

board,

see

Section

4.

(4)

GEN-LOCK

function

The

output

signal

of

this

equipment

can

be

phase-

synchronized

with

the

GEN-LOCK

input

signal

by

connecting

the

GEN-LOCK

input

connector

on

the

rear

panel

with

a

black

burst

signal

which

makes

a

reference

or

a

stable

composite

video

sienmal

(8.28.,

color

bar

signal).

(5)

DOC

function

When

the

RF

signal

(for

DOC)

of

a

VTR

is

connected

to

the

RF

IN

connector

on

the

rear

panel,

and

when

the

DOC

ON/OFF

switch

on

the

front

panel

is

set

to

ON,

dropout

compensation

can

be

made

line

by

line.

(6)

V,

blanking

can

be

turned

on/off.

VITC

and

other

input

signals

during

the

vertical

blanking

period

can

be

passed

by

turning

off

the

\V.

Blanking

switch

at

the

front

of

the

printed

circuit

board.

(7)

Noise

reduction

function

The

chroma

signal

noise

reduction

function

is

alwavs

at

work,

bringing

about

an

improvement

of

about

-3

dB.

When

the

Y-signal

noise

reduction

function

is

brought

into

play,

vertical

resolution

deteriorates.

Therefore,

a

function

which

detects

vertical

correlation

is

provided

so

as

to

prevent

the

deterioration

of

vertical

resolution.

The

variable

resistor

VRIO

within

the

digital

circuit

board

(underside

performs

the

function

of

adjusting

vertical

correlation

detection

sensitivity.

When

set

at

the

extreme

counterclockwise,

the

Y-

Signal

noise

reduction

function

does

not

work

at

all.

When

turned

clockwise

gradually,

the

function

goes

into

operation.

When

set

at

the

extreme

clockwise,

Y-

Signal

noise

reduction

operates

perfectly,

but

vertical

resolution

deteriorates.

1-4

STANDARD

CONFIGURATION

The

IVT-7

is

composed

of

two

main

circuit

boards

and

a

power

supply.

On

the

front

panel

of

the

chassis

is

a

printed

circuit

board

mounted

with

a

switch

and

an

LED

and

is

connected

with

the

main

circuit

boards

by

cables.

The

rear

panel

forms

one

body

with

the

shield

board

on

which

the

main

boards

are

mounted.

When

the

front

panel

board

and

the

main

board

are

to be

removed,

be

sure

to

cut

off

the

power

supply.

A

simple

configuration

drawing

is

shown

in

Section

4.

1-5

ACCESSORIES

Standard

accessories

Power

cable

1

Spare

fuse

1

Rack

mount

adapter

2

Optionals

TR-7

CA3-2

CA4-2

CA2-2P

CA2-2

Rubber

legs

4

Remote

control

unit.

The

functions

of

TR-7

are

field

freeze,

frame

freeze

and

bypass

control.

Cable

for

YC358

input

(for

7-pin

input)

YC358

input

connectors

provided

are

4-pin

and

7-pin

connectors.

Connect

with

either.

Cable

for

YC358

output.

A

7/4-pin

cable

for

connections

the

YC358

output

signal

of

this

equipment

with

an

S-VHS

or

ED-BETA

VTR

equipped

with

a

4-pin

input

connector.

7/7-pin

cable.

This

cable

is

to

connect

this

equipment

provided

with

a

7-pin

YC358

input

or

output

connector.

U-DUB

input

cable.

This

connector

is

provided

with

a

7-

connector

at

one

end

and

7-pin

and

BNC

connectors

at

the

other

end.

Connect

one

of

the

7-pin

connectors

With

the

YC

input

connector

of

the

IVT-7.

Connect

the

other

7-pin

connector

with

DUB

OUT

and

the

BNC

connector

with

VIDEO

OUT.

DUB

output

signals

sent

out

by YC

separation

can

be

connected

with

a

3/4"

VTR

(U-MATIC)

or

VHS

VTR.

SECTION

2

INSTALLATION

2-1

UNPACKING

AND

INSPECTION

The

IVT-7

is

shipped

in

adequately

packed

form.

If

the

product

is

found

to

be

damaged

when

unpacked,

contact

the

express

company

or

supplier

without

delay.

The

product

is

packed

in

such

a

manner

that

it

can

be

transported

easily.

When

the

product

is

to

be

moved

or

transported,

use

the

packing

material

used

for

delivery

and

take

care

not

to

apply

abrupt

shocks.

At

the

time

of

unpacking,

make

sure

of

the

accessories

(1-5).

2-2

INSTALLATION

The

IVT-7

not

only

permits

desk-top

use,

but

it

also

can

be

mounted

on

the

19-inch

standard

rack

with

the

aid

of

the

standard

accessory

adapter.

If

the

IVT-7

is

to be

used

in

the

best

condition,

it

should

be

kept

permeable

inside.

For

internal

ventilation,

the

air

for

cooling

is

sucked

in

from

both

sides

and

blown

out

by

the

rear

fan.

Therefore,

the

inlet

and

outlet

ports

should

be

kept

apart

from

the

wall

and

the

floor

to

ensure

sufficient

ventilation.

When

used

on

the

desk

top,

it

should

have

the

standard

accessory

rubber

legs

at

four

points.

Do

not

place

on

the

equipment

any

heavy

object

exceeding

20

kg.

If

anything

is

placed

on

the

equipment,

a

board

of

wood

or

the

like

should

be

placed

between

the

equipment

and

the

object.

2-3

SYSTEM

CONFIGURATION

Here

1S

an

example

of

IVT-7

connection.

In

case

of

no

GEN-LOCK

IN

connection,

the

IVT-7

operates

with

the

aid

of

the

internal

synchronizing

Signal

generator.

When

a

GENLOCK

signal

is

connected,

the

output

signal

of

the

IVT-7

is

svnchronized

with

it.

10

w2-3-1

VIDEO

IN

-»

VIDEO

OUT

YC358

OUT

VIDEO

|

VHS

etc.

[fouT

IN

}

IVT-7

REFERENCE

BB

GEN-LOCK

IN

Open

the

front

panel

and

set

the

input

selection

switch

at

VIDEO.

LED

display

"VIDEO"

on

the

front

panel

will

light

up.

Two

kinds

of

output

signals

are

outputted

at

the

same

time,

but

in

the

bypass

mode

or

when

the

power

supply

is

off,

VIDEO-IN

signals

are

outputted

directly

at

VIDEO

OUT-1.

The

frequency

characteristic

of

the

VIDEO-IN

mode

turn

VR13

on

the

analog

circuit

board

clockwise.

Then

a

characteristic

exceeding

3.0

MHz,

-3

dB

will

be

obtained.

11

J

C)

VR13

ANALOG

PROCESSOR

W2-3-2

YC358

IN

S-VHS

etc.

Is

YC.

>

VIDEO

OUT

iN}

|

>

YC358

OUT

IVT-—7

REFERENCE

BB

GEN-LOCK

IN

CA2-2P

OY

CA3-2

Open

the

front

panel

and

set

the

input

selection

Switch

to

"YC".

LED

"YC"

on

the

front panel

will

light

up.

Two

Kinds

of

output

signals

are

outputted

at

the

same

time,

but

in

the

bypass

mode

or

when

the

power

supply

is

off,

YC

input

signals

are

outputted

directly

12

I-DEN IVT-7 NTSC User manual

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