Fairchild 670 - Outstanding Features; First Modern Limiter Design; Independent Vertical and Lateral Amplitude Control; Extremely Fast Attack Time

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FAIRCHILD

STEREO

LIMITER

-

MODEL

670

OUTSTANDING

FEATURES

FIRST

MODERN

LIMITER

A

radical

departure

fram

the

classical

limiter

design

in

the

MODEL

670

is

char~

acterized

by

the

complete

absence

of

audible

thumps,

absence

of

distortion

and

noise,

and

it

is

extremely

stable

over

long

periods

of

time.

,

UNITS

IN

ONE

The

MODEL

670

is

either

2

Independent

Limiters,

or

by

the

flick

of

a

switch

a

Vertical-Lateral

Component

Limiter—all

this

enclosed

within

1

inches

of

rack

space.

INDEPFNDENT

CONTROL

OF

BOTH

VERTICAL

AND

LATERAL

AMPLITUDES

ON

STEREO

DISKS

Large

vertical

amplitudes

on

STEREO

DISKS

often

produce

processing

as

well

as

.

tracking

problems.

Large

vertical

amplitudes

are

produced

by

randan

coincidence

of

out-of-phase

components

in

the

two

STEREO

channels.

The

MODEL

670

is

the

only

wit

presently

in

production

which

can

control

both

components

(vertical

and

lateral)

independently,

and

accomplish

this

with

minimum

loss

of

separation.

EXTREMELY

FAST

ATTACK

TIME

Many

a

short

transient

can

pass

through

conventional

limiters

because

of

their

slowness

in

attack,

The

MODEL

670

can

produce

full

limiting

effect

during

the

first

10,000ths

of

a

secamd.

VARIABLE

RELEASE

TIME

Different

program

materials

require

different

limiting

action.

By

choosing

the

correct

release

time

characteristic,

even

severe

limiting

can

be

made

to

be

practically

imperceptible.

The

MODEL

670

supplies

six

different

timing

curves,

several

of

them

making

the

release

time

an

automatic

function

of

the

amount

of

limiting

used.

LIMITER

OR

COMPRESSOR

The

type

of

program

material

as

well

as

personal

preference

dictate

the

use

of

either

a

limiter

or

a

compressor.

The

MODEL

670

can

be

adjusted

to

work

either

as

a

compressor,

with

a

ratio

of

2

to

1

and

a

threshold

of

5

db

below

normal

program

level;

or

as

a

peak

limiter,

with

a

canpression

ratio

of

30

to

1

and

a

threshold

of

10

db

above

normal

program

level;

or

it

can

be

adjusted

to

operate

anywhere

in-between

these

two

extremes.

RELIABILITY

Highest

grade

commercial

and

military

components

are

used

throughout

working

well

below

their

maximum

ratings

to

insure

long,

trouble-free

operation.

D8~670-659

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