Rotel RT-970BX Manuel utilisateur

RO

ТЕ

5

AM/FM

STEREO

TUNER

RI-970BX

Owners

manud

WARNING

TO

PREVENT

FIRE

OR

SHOCK

HAZARD,

DO

NOT

EXPOSE

THIS

APPLIANCE

TO

RAIN

OR

MOISTURE.

Write

your

SERIAL

NUMBER

here.

The

number

is

located

near

the

name

plate

on

the

rear

panel.

SAFETY

INSTRUCTION

1.

Read

Instructions—

All

the

safety

and

operating

instructions

should

be

read

before

the

appliance

is

operated.

2.

Retain

Instructions—

The

safety

and

operating

instructions

should

be

retained

for

future

reference.

3.

Heed

Warnings—All

warnings

on

the

appliance

and

in

the

operating

instructions

should

be

adhered

to.

4.

Follow

Instructions—

All

operating

and

use

instructions

should

be

followed.

5.

Water

and

Moisture—

The

appliance

should

not

be

used

near

water

-

for

example,

near

a

bathtub,

washbowl

kitchen

sink,

laundry

tub,

in

a

wet

basement,

or

near

a

swimming

pool,

and

the

like.

6.

Carts

and

Stande—the

appliance

should

be

used

only

with

a

cart

or

stand

that

is

recommended

by

the

manufac-

turer.

6A.

An

appliance

and

cart

combination

should

be

moved

with

care.

Quick

stops,

excessive

force,

and

uneven

surfaces

may

cause

the

appliance

and

cart

combination

to

overturn.

7.

Wall

or

Ceilling

Mounting—

The

ap-

pliance

should

be

mounted

to

a

wall

or

ceilling

only

as

recommended

by

the

manufacturer.

8.

Ventilation—The

appilance

should

be

situated

so

that

its

location

or

position

does

not

interfere

with

its

proper

ventilation.

For

example,

the

appliance

should

not

be

situated

on

a

bed,

sofa,

rug,

or

similar

surface

that

may

block

the

ventilation

openings;

or

placed

in

a

built-in

installation

such

as

a

bookcase

or

cabinet

that

may

impede

the

flow

of

air

through

the

ventilation

openings.

9.

Heat—

The

appliance

should

be

situated

away

from

heat

sources

such

as

radiators,

heat

registers,

stoves,

or

other

appliances

(including

amplifiers)

that

produce

heat.

10.

Power

Sources—

The

appliance

should

be

connected

to

a

power

supply

only

of

the

type

described

in

the

operating

instructions

or

as

marked

on

the

appliance.

11.

Grounding

or

Polarization—

The

precautions

that

should

be

taken

so

that

the

grounding

or

polarization

means

of

an

appliance

is

not

defeated.

12.

Power-Cord

Protection—

Power-supply

cords

should

be

routed

so

that

thay

are

not

likely

to

be

walked

on

or

pinched

by

items

placed

upon

or

against

them,

paying

particular

attention

to

cords

at

plugs,

convenience

receptacles,

and

the

point

where

thay

exit

from

the

appliance.

PORTABLE

CART

WARNING

53125А

Power

Lines

~

An

outdoor

antenna

should

be

located

away

from

power

lines.

Outdoor

Antenna

Grounding

~

If

an

outside

antenna

is

connected

to

the

receiver,

be

sure

the

antenna

system

is

grounded

so

as

to

provide

some

protection

against

voltage

surges

and

built

up

static

charges.

Section

810

of

the

National

Electrical

Code,

ANSI

/

NFPA

No.

70-1984,

provides

information

with

respect

to

proper

ground-

ing

of

the

mast

and

supporting

structure,

grounding

of

the

lead-

in

wire

to

an

antenna

discharge

unit,

size

of

grounding

con-

ductors,

location

of

antenna-discharge

unit,

connection

to

ground-

ing

electrodes,

and

requirements

for

the

grounding

electrode.

See

Figure.

a-

Use

No.

10

AWG

(5.3

mm?)

copper,

No.

8

AWG

(8.4

mm?)

aluminum,

No.

17

AWG

(

1.0

mm?)

copper-clad

steel

or

bronze

wire,

or

larger,

as

a

ground

wire.

b-

Secure

antenna

lead-in

and

ground

wires

to

house

with

stand

-off

insulators

spaced

from

4-6

feet

(1.22

~

1.83

m)

apart.

c-

Mount

antenna

discharge

unit

as

close

as

possible

to

where

lead-in

enters

house.

d-

Use

jumper

wire

not

smaller

than

No.

6

AWG

(

13.3

mm?)

copper,

or

the

equivalent,

when

a

separate

antenna-grounding

electrode

is

used.

13.

Cleaning—

The

appliance

should

be

cleaned

only

as

recom-

mended

by

the

manufacturer.

14.

Nonuse

Periods—

The

power

cord

of

the

appliance

should

be

unplugged

from

the

outlet

when

left

unused

for

a

long

period

of

time.

15.

Object

and

Liquid

Entry—

Care

should

be

taken

so

that

objects

do

not

fall

and

liquids

are

not

spilled

into

the

enclosure

through

openings.

16.

Damage

Requiring

Service—

The

appliance

should

be

serviced

by

qualified

factory

authorized

service

personnel

when:

A.

The

power-supply

cord

or

the

plug

has

been

damaged;

or

B.

Objects

have

fallen,

or

liquid

has

been

spilled

into

the

appliance;

or

C.

The

appliance

has

been

exposed

to

rain;

or

D.

The

appliance

does

not

appear

to

operate

normally

or

exhibits

a

marked

change

in

performance;

or

E.

The

appliance

has

been

dropped,

or

the

enclosure

damaged.

17.

Servicing—

The

user

should

not

attempt

to

service

the

appliance

beyond

that

described

in

the

operating

instructions.

All

other

servicing

should

be

referred

to

qualified

factory

authorized

service

personnel.

WARNING:

To

reduce

the

risk

of

fire

or

electric

shock,

do

not

expose

this

appliance

to

rain

ог

moisture

CAUTION

RISK

OF

ELECTRIC

SHOCK

DO

NOT

OPEN

CAUTION:

TO

REDUCE

THE

RISK

OF

ELECTRIC

SHOCK,

DO

NOT

REMOVE

COVER

(OR

BACK).

NO

USER-SERVICEABLE

PARTS

INSIDE.

REFER

SERVICING

TO

QUALIFIED

SERVICE

PERSONNEL.

The

lightning

flash

with

arrowhead

symbol,within

an

equilateral

triangle,is

intended

to

alert

the

user

to

the

presence

of

uninsulated

“dangerous

voltage“

within

the

product's

enclosure

that

may

be

of

sufficient

magnitude

to

constitute

a

risk

of

electric

shock

to

persons.

intended

to

alert

the

user

to

the

presence

of

important

operating

and

maintenance

(servicing)

instructions

in

The

exclamation

point

within

an

equilateral

triangle

is

the

literature

accompanying

the

appliance.

EXAMPLE

OF

ANTENNA

GROUNDING

AS

PER

NATIONAL

ELECTRICAL

CODE

INSTRUCTIONS

ELECTROOE

SYSTEM

(09

nieno

metal

water

(>ре)

OPTIONAL

ANTENNA

GROUNDING

ELECTROOE

DRIVEN

6

FEET

(2

44

m)

INTO

THE

EARTH

REQUIRED

BY

LOCAL

CODES.

SEE

NEC

SECTION

810-21

(0

FOR

U.S.A.

ONLY

ENGLISH

AM

/

FM

STEREO

TUNER

RT-970BX

A

WORD

FROM

ROTEL

Rotel

take

this

opportunity

to

thank

you

for

choosing

our

equipment

for

your

home

entertainment.

Rotel

equipment

represents

a

very

high

state

of

the

art

in

sound

reproduction,

as

the

result

of

our

everlasting

deter-

mination

to

achieve

the

truly

hi-fi

performance.

Please

enjoy

the

sound

Rotel

have

created

for

many

years

to

come.

To

make

sure

you

get

the

most

out

of

your

equipment,

please

read

this

owner’s

manual

carefully

before

you

at-

tempt

any

connections.

BEFORE

CONNECTIONS

1.

Place

for

Installation

Ensure

to

place

the

unit

in

a

flat

surface

where

it

is

free

from

humidity,

vibration,

high

temperature

and

not

exposed

to

direct

sunlight.

Also,

be

careful

not

to

place

the

unit

in

a

highly

enclosed

area

without

adequate

ventilation

around

the

unit.

Do

not

block

the

ventilation

openings

at

the

top

and

the

bottom

of

the

unit

to

prevent

excessive

heat

built

up.

2.

Electrical

Requirements

Your

equipment

has

been

designed

to

be

powered

by

the

local

AC

voltage.

Check

the

setting

of

your

unit

by

looking

at

the

rear

panel

name

plate.

Never

try

to

plug

the

unit

into

an

outlet

of

higher

voltage,

as

this

causes

a

serious

fire

hazard.

Consult

your

dealer

if

in

doubt.

3.

Connecting

the

Power

Cord

Always

handle

the

power

cord

with

care.

Ensure

to

con-

nect

the

cord

to

the

household

wall

outlet.

When

plugging

and

unplugging

make

sure

the

power

switch

on

the

unit

is

turned

off.

4.

Do

not

Open

the

Cabinet

There

are

no

user-serviceable

parts

inside

the

cabinet

of

the

unit.

Do

not

attempt

to

open

the

cabinet

or

tamper

with

EXCLUSIVE

NOTE

FOR

U.K.

f

your

unit

comes

with

a

2-core

mains

lead

without

a

plug,

neither

core

is

to

be

connected

to

the

earth

terminal

of

a

three

plug,

make

certain

that

they

are

connected,

according

to

the

following

instruction,

to

the

proper

terminals.

Check

that

the

terminals

are

screwed

down

firmly

and

no

loose

strands

of

wire

are

present.

IMPORTANT:

The

wires

in

this

mains

lead

are

coloured

in

accordance

with

the

following

code:

BLUE:

NEUTRAL

BROWN:

LIVE

As

the

colours

of

the

wires

in

the

mains

lead

of

this

apparatus

may

not

correspond

with

the

coloured

markings

identifying

the

terminals

in

your

plug

proceed

as

follows:

The

wire

which

is

coloured

BLUE

must

be

connected

to

the

terminal

which

is

marked

with

the

letter

N

or

coloured

BLUE

or

BLACK.

The

wire

which

is

coloured

BROWN

must

be

connected

to

the

terminal

which

is

marked

with

the

letter

L

or

coloured

BROWN

or

RED.

the

internal

components.

If

water

or

foreign

object

falls

inside

the

unit

by

accident,

disconnect

the

power

cord

immediately

and

consult

a

qualified

electrician

or

your

dealer.

5.

Cleaning

Your

Unit

If

your

unit

becomes

dirty,

wipe

it

gently

with

a

soft,

dry

cloth.

Never

use

solvents

of

any

kind.

CONNECTIONS

1.

Connecting

to

Integrated

Amplifier

or

Preamplifier

a)

Connect

the

OUTPUT

terminals

on

the

back

of

the

tuner

tothe

TUNER

inputs

on

the

rear

of

your

integrated

amplifier

or

preamplifier

using

the

proper

interconnecting

cords

supplied

with

the

tuner.

Make

sure

the

Right

(RED)

and

the

Left

(WHITE)

channels

are

correctly

connected.

b)

Note

you

may

connect

the

tuner

to

the

AUX

inputs

on

your

integrated

amplifier

or

preamplifier,

if

necessary.

AMPLIFIER

RT-970BX

2.

Installing

and

Connecting

Antenna

a)

Indoor

FM

Antenna

-

the

attached

indoor

antenna

wire

will

suffice

for

proper,

quiet

broadcast

reception

in

most

good

reception

areas.

To

install

it,

connect

the

antenna

to

the

FM

ANTENNA

terminals

on

the

back

of

the

tuner.

Then,

stretch

the

wire

out

and

secure

along

one

wall

or

where

reception

is

optimal.

ө

Indoor

Т-ѕһар

Antenna

wire

(Applicable

for

U.S.A.,

Canada

or

where

approved

to

the

usage)

FM

752

T-shap

antenna

wire

(300

ohm

)

300

ohm

—>75

ohm

Conversion

Plug

е

Indoor

Antenna

wire

(Applicable

for

European

version)

FM75Q

G

AM

a

OO

0)

59

Antenna

wire

А

ў

b)

Outdoor

FM

Antenna

-

In

areas

of

average

to

weak

reception

conditions,

an

outdoor

antenna

mounted

on

the

roof

or

top

of

the

building

may

be

necessary

for

best

results.

When

using

such

outdoor

type

antenna,

ensure

remove

the

indoor

antenna.

A

75-ohm

coaxial

cable

is

usually

recommended.

If

using

this

type

cable,

properly

hook

it

up

to

the

designated

antenna

terminals

on

the

back

of

the

tuner.

When

in

doubt

on

the

FM

outdoor

antenna

system,

consult

your

dealer.

FM752

G

AM

^

QA

E

75

оһт

coaxial

cable

To

outdoor

FM

antenna

c)

AM

Antenna

-

the

loop

antenna

is

provided

for

AM

reception.

Lock

the

loop

onto

the

loop

holder

on

the

back

of

the

tuner,

and

connect

the

two

ends

to

the

antenna

terminals

marked

G

and

AM.

Swing

out

the

loop

around

for

finding

the

best

AM

reception.

In

difficult

reception

areas,

connect

an

outdoor

antenna

which

is

usually

a

long

piece

of

shielded

wire

to

the

AM

terminal.

Make

sure

the

loop

is

still

left

connected

even

if

the

outdoor

or

another

antenna

is

used.

Swing

out

for

optimal

reception

To

outdoor

AM

antenna

SWITCHES

AND

CONTROLS

(1)

Power

Button

Press

this

button

to

turn

on

and

off

the

unit.

The

LED

indicator

above

it

will

glow

when

the

power

is

turned

on.

CAUTION:

As

long

as

the

power

cord

is

connected

to

a

live

AC

outlet,

power

is

supplied

to

the

tuner

regardless

of

the

position

of

the

power

button.

This

is

to

enable

the

memory

backup

to

work.

(2)

Signal

Indicator

The

"0"

to

"5"

digital

indicator

lights

up

to

show

the

incom-

ing

strength

(sensitivity).

Receiving

condition

for

a

broad-

cast

is

optimized

when

"5"

or

the

higher

number

illuminated.

(3)

Frequency

Display

and

Multi-function

Indicator

1)

The

frequency

of

the

station

selected

is

displayed.

The

band

chosen,

FM

ог

AM,

is

also

shown

together

with

MHz

for

FM

or

KHz

for

AM

on

the

frequency

display.

2)

The

word

MEMORY

lights

up

while

the

Memory

button

is

activated.

3)

The

word

STEREO

glows

when

stereo

broadcasting

station

is

tuned

in

and

when

the

Muting

Off/

Mono

button

is

deactivated

for

the

stereo

operation.

It

will

also

not

light

up

for

very

weak

stereo

signals

which

the

tuner

will

not

receive

in

stereo.

(4)

Station

Buttons

Pressing

one

of

these

buttons

will

tune

the

tuner

to

the

frequency

stored

in

the

memory.

Pressing

the

Memory

button

followed

by

one

of

these

buttons

will

store

the

frequency

displayed

in

that

menory.

It

is

possible

to

store

up

to

16

AM

or

FM

stations

in

the

memory.

The

LED

on

each

station

button

will

light

up

when

station

button

pressed.

CAUTION:

If

the

AC

power

is

removed

from

the

tuner

for

more

than

2

weeks,

the

frequencies

stored

in

the

memories

will

be

lost.

NOTE:

Each

time

you

switch

the

tuner

on,

it

will

tune

to

the

station

frequency

to

which

it

was

previously

tuned.

(5)

+8

button

The

tuner

can

store

up

to

16

different

frequencies

in

its

memory.

The

first

8

are

selected

(or

stored)

just

by

press-

ing

the

appropriate

button.

The

second

8,

numbers

9

to

16

are

selected

by

pressing

the

+

8

button

and

then

pressing

the

desired

station

button,

the

LED

on

it

will

light

up,

when

the

+8

button

pressed.

(6)

Tuning

Button

Allows

to

tune

in

frequecies.

Press

the

right

side

button

marked

>

to

increase

the

frequency

and

the

left

side

button

marked

<

to

decrease

it.

(7)

Memory

Button

Stores

frequencies

in

the

tuner’s

memory.

To

store

a

frequency

first

tune

to

the

desired

broadcast

program

using

the

Tuning

button.

Then

press

the

Memory

button

followed

by

one

of

the

station

buttons

marked

1

to

8

and

9

to

16

with

the

+8

button.

Although

there

are

only

8

buttons

marked

for

positions

1

to

8,

the

+8

button

con-

verts

the

buttons

to

positions

9

to

16.

So

the

buttons

have

double

functions,

e.g.,

the

button

1

is

also

9

when

used

with

the

+8

button.

The

Memory

indicator

in

the

display

will

light

up

during

this

process.

Note

that

once

the

Memory

button

is

pressed,

you

must

press

the

required

station

button

within

a

few

seconds

to

store

the

station

frequency.

If

the

Memory

indicator

is

no

longer

light,

you

must

press

the

Memory

button

again

before

storing

the

required

frequency.

For

example,

to

store

desired

local

station

in

the

station

button

12,

first

tune

in

to

the

station,

press

the

Memory

button,

then

press

the

+8

button

and

follow

to

press

the

station

button

4.

(8)

Auto

Tuning

Button

Permits

to

choose

auto

or

manual

tuning.

Inthe

auto

mode,

pressing

either

the

Tuning

button

will

cause

the

tuner

to

increase

or

decrease,

depending

on

which

end

of

the

Tuning

button

pressed,

the

received

frequency

until

a

reasonably

strong

signal

is

received.

At

this

point

the

tuning

will

stop

automatically.

inthe

manual

mode,

pressing

either

Tuning

button

causes

the

tuner

to

increase

or

decrease

the

received

frequency

only

for

as

long

as

the

Button

is

depressed.

NOTE:

Auto

tuning

does

not

operate

for

AM

band.

ROTEL

AM/FM

STEREO

TUNER

RT—970BX

(9)

FM

Wide

button

Press

the

button

to

the

WIDE

position

for

a

wider

FM

bandwidth

to

enjoy

better

FM

sound

during

normal,good

reception

conditions.

If

there

is

too

much

hiss

or

noise

from-the

neighboring

station.

etc.,

press

the

button

to

deactivate

the

wide

circuit

and

back

to

normal

bandwidth

position

for

reducing

such

noise

as

mush

as

possible.

(10)

RF

ATT

button

Press

the

button

to

attenuate

the

RF

gain

for

reducing

the

noise

from

the

strong

neighboring

station

received.

(11)

Mute

Off/

Mono

Button

Allows

selection

of

FM

mono

or

stereo

operation.

When

the

Mono

position

is

chosen,

any

broadcast

will

be

received

monaurally

and

the

muting

switch

for

suppress-

ing

interstation

noise

will

be

deactivated

to

pull

weak

signals

which

are

normally

cut

off

during

the

stereo

opera-

tion.

For

reception

of

weak

and

noisy

signals,

use

the

Mute

Off/

Mono

position.

For

normal

use,

choose

the

stereo

operation

by

deactivating

the

Button.

in

this

position,

stereo

broadcasts

will

be

provided

in

stereo

and

the

STEREO

indicator

will

light

up.

When

mono

programs

are

broadcasted,

mono

sound

is

provided

and

the

STEREO

indicator

will

not

light.

(12)

Hi-Blend

button

Press

the

button

to

reduce

the

annoying

noise

mixed

in

with

the

signal.

This

switch,

however,

should

not

be

always

deactivated

unless

necesary.

(13)

AM

Wide

Button

Press

the

Button

to

the

wide

position

for

a

wider

AM

bandwidth

to

enjoy

better

AM

sound

during

normal,

good

reception

conditions.

If

there

is

too

much

hiss

or

noise

from

neighboring

stations,

etc.,

press

the

Button

to

deactivate

the

Wide

circuit

and

back

to

the

normal

bandwidth

position

for

reducing

such

noise

as

much

as

possible.

(14)

Band

Selection

button

Allows

to

select

reception

on

FM

or

AM

band.

WORDS

ON

OPERATIONS

Precautions

1.

Before

commencing

operation,

check

to

see

if

all

con-

nections

are

properly

made.

2.

Always

ensure

to

set

the

Volume

control

of

the

con-

nected

integrated

amplifier

or

preamplifier

to

the

minimum

position

before

turning

on

the

Power

switch.

Raise

the

volume

level

after

the

desired

station

is

tuned

in.

Memory

Backup

As

explained

above,

the

memory

for

the

preset

stations

is

retained

as

long

as

the

power

cord

is

plugged

into

an

AC

outlet,

regardless

of

the

position

of

the

Power

button.

However,

if

you

leave

the

power

cord

unplugged

for

over

2

weeks,

or

if

there

is

a

power

failure

for

over

three

days,

the

stored

frequencies

will

be

lost.

In

such

cases,

the

operation

for

storing

frequencies

in

the

memory

have

to

be

done

again

from

the

beginning.

Tuning

Modes

Bear

in

mind

that

there

are

3

modes

of

tuning

with

the

tuner

:

auto

tuning,

manual

tuning,

and

preset

(memory)

tuning.

The

simpliest

is

the

preset

tuning,

as

you

only

have

to

stored

up

to

16

of

your

favorite

FM

or

AM

stations

once

and

recall

any

one

of

them

with

one

touch

(or

two

touches

in

case

of

the

buttons

9to16).

Make

sure

tolearn

the

proper

method

for

the

storage

in

the

memory

as

instructed

above.

HUM

AND

NOISE

Inany

high

fidelity

installations,

hum

may

be

caused

by

the

interconnection

of

turntable,

tuner,

amplifier

and

speakers

as

the

result

of

wiring,

different

grounding

or

locations

of

components.

Normally,

hum

is

rarely

associated

with

a

faulty

tuner,

and

the

most

likely

cause

lies

in

the

installation.

If

any

part

of

the

antenna

is

in

contact

with

a

ground

point

(copper

water

pipes

for

example)

hum

will

almost

certainly

reduce

if

your

amplifier

has

a

three

core

mains

lead.

It

is

also

important

to

check

that

the

audio

interconnect

cords

have

been

pushed

fully

into

their

sockets

on

both

tuner

and

amplifier.

Sometimes

the

problem

is

actually

caused

by

a

signal

which

is

too

strong,

in

which

case

an

antenna

attenuator

is

recommended.

If

in

doubt,

please

consult

your

dealer.

SPECIFICATIONS

RT-970BX

FM

TUNER

SECTION

Usable

Sensitivity.............

10.8

dBf/

0.95

uV

(75

ohms)

50

dB

Quieting

Sensitivity:

Мопо..............................

14.8

dBf/

1.5

uV

(75

ohms)

SIOIBOS

езана

37.2

dBf/

20

uV

(75

ohms)

Signal-to-Noise

Ratio

(at

65

dBf):

МОГ

лл

гарал

83

dB

Sinou

78

dB

Harmonic

Distortion

(at

65

dBf):

WA

Ze

ш

аа

аА

0.05

%

(mono),

0.21

%

(stereo)

Frequency

Response.......30

to

15,000

Hz,

+/-0.5

dB

Capture

Вайо....................

1.0

dB

Alternate

Channel

Selectivity:

Wide/

Магтом..................

60

dB/

80

dB

Adjacent

Channel

Selectivity...15

dB

(Narrow)

Spurious

Response

Ratio..100

dB

Image

Response

Ratio......75

dB

IF

Response

Ratio.............

100

dB

AM

Suppresion

Ratio.........

60

dB

Stereo

Separation:

100

Hz/

1

КН2/

10

kHz....43

dB/

48

dB/

38

dB

Subcarrier

Product

Ratio...60

dB

SCA

Rejection

Вайо..........

70

dB

Output

M

E

aE

1.0

V

Antenna

Іприї....................

75

ohms

unbalanced

AM

TUNER

SECTION

SENSIS

Yeston

350

uV/m

Selectivity

(Wide/

Narrow)..27

dB/

42

dB

Signal

to

Noise

Вайо.........

55

dB

Image

Response

Ratio......40

dB

If

Response

Ratio..............

60

dB

PUTTOTINA

Ss

:ncesssnncasnsseseccassees

Loop

Antenna

MISCELLANEOUS

Power

Requiremenrt..........

120

V/

60

Hz,

220

V/

50

Hz,

240

V/

50

Hz

(depending

on

destinations)

Power

Consumption........

10

watts

Dimensions

(overall)........

440

(W)

x

72

(H)

x

327

(D)

mm

17-3/8"

x

2-7/8"

х

13"

Weight

(пе!)......................

3.9

kg/

8.58

Ibs.

e

Specifications

and

design

subject

to

possible

modifica-

tion

without

notice.

Rotel RT-970BX Manuel utilisateur

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