BBE 422 Manual de usuario

Otros manuales para 422

1

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Important

Safeguards

A

A

To

prevent

fire

or

shock

hazard,

do

not

expose

the

unit

to

rain

or

moisture.

ATTENTION:

RISQUE

DE

CHOC

ELECTRIC-

NE

PAS

OUVRIR.

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.

The

exclamation

point,

within

a

equilateral

triangle

is

intended

to

alert

the

user

to

the

presence

of

important

operating

and

maintenance

(servicing)

instructions

in

the

literature

accompanying

the

appliance.

For

your

protection,

please

read

these

safety

instructions

completely

before

operating

the

appliance,

and

keep

this

manual

for

future

reference.

Carefully

observe

all

warnings,

precautions

and

instructions

on

the

appliance

and

described

in

the

operating

instructions

supplied

with

the

appliance.

INSTALLATION-

Water

and

Moisture

-

Do

not

install

the

appliance

near

water:

for

example,

near

a

bathtub,

washbowl,

kitchen

sink,

laundry

tub,

in

a

wet

basement,

or

near

a

swimming

pool.

Heat

-

Do

not

install

the

appliance

near

sources

of

heat

such

as

radiators,

heat

regis¬

ters,

stoves,

or

other

appliances

that

pro¬

duce

heat.

USE

-

Power

Source

-

Connect

the

appliance

to

a

power

supply

only

of

the

type

described

in

the

operating

instructions

or

as

marked

on

the

appliance.

Power-Cord

Protection

-

Route

the

power

cord

so

that

it

is

not

likely

to

be

walked

on

or

pinched

by

having

objects

placed

on

it,

paying

particular

attention

to

the

plugs,

receptacles,

and

the

point

where

the

cord

exits

from

the

appliance.

SERVICE

-

Unplug

the

appliance

from

the

wall

outlet

and

consult

qualified

service

personnel

when:

*

the

power

cord

or

the

plug

has

been

damaged.

*

a

solid

object

or

liquid

has

fallen

into

the

cabinet.

Ventilation

-

Situate

the

product

so

its

location

or

position

does

not

interfere

with

its

proper

ventilation.

For

example,

you

should

not

place

the

product

on

a

bed,

sofa,

rug,

or

similar

surface

that

might

block

the

vent

openings,

or

placed

in

a

built-in

installation,

such

as

a

bookcase

or

cabinet

that

might

impede

the

flow

of

air

through

the

ventilation

openings.

Grounding

or

Polarization

-

Do

not

defeat

the

grounding

or

polarization

feature

of

the

AC

power

cord.

If

your

AC

receptacle

will

not

accept

the

power

cord

plug,

contact

your

electrician

to

install

a

proper

AC

receptacle.

When

not

in

use

-

Unplug

the

power

cord

of

the

appliance

from

the

outlet

when

left

unused

for

a

long

period

of

time.

To

disconnect

the

cord,

pull

it

out

by

grasping

the

plug.

Never

pull

the

plug

out

by

the

cord.

*

the

appliance

has

been

exposed

to

rain

or

moisture.

*

the

appliance

does

not

appear

to

operate

normally

or

exhibits

a

marked

change

in

performance.

*

the

appliance

has

been

dropped,

or

the

enclosure

damaged.

Wall

or

Ceiling

Mounting

-

If

your

appliance

can

be

mounted

to

a

wall

or

ceil¬

ing,

mount

it

only

as

recommended.

AC

Receptacle

-

Check

to

make

sure

that

the

AC

receptacle

holds

the

power

cord

plug

firmly

and

securely.

If

the

power

cord

plug

is

loose,

contact

your

electrician

to

replace

the

defective

and

unsafe

AC

Foreign

Objects

-

Be

careful

that

foreign

objects

and

liquids

do

not

enter

the

enclosure

through

openings.

Do

not

attempt

to

service

the

appliance

beyond

that

described

in

the

operating

instructions.

For

all

other

sen/icing,

refer

to

qualified

sen/ice

personnel

only.

Congratulations!

Thank

you

for

buying

the

BBE

Model

422

MAXIE

Sonic

Maximizer.

You

now

own

a

very

unique

signal

processing

device

with

no

other

equal

in

the

audio

world.

Whether

you

purchased

the

BBE

422

for

your

home

studio

or

club

P.A.

system,

you

will

find

the

unit’s

rugged

construction

and

careful

electronic

design

a

welcome

addition

to

your

audio

system.

This

manual

will

help

you

use

the

BBE

422

more

effectively

and

in

ways

of

which

you

may

not

be

aware.

Review

of

the

information

contained

in

this

owner's

manual

will

answer

most

of

the

common

questions

that

our

service

department

receives.

But

if

you

still

have

questions,

please

feel

free

to

call

toll-free

(in

USA)

1-800-233-8346

or

(in

CA)

1-800-558-3963.

The

BBE

™

Process

—

“What

Is

It?”

Loudspeakers

have

difficulty

dealing

with

the

electronic

signals

supplied

by

an

amplifier.

These

difficulties

cause

such

major

phase

and

amplitude

distortion

that

the

sound

reproduced

by

a

speaker

differs

significantly

from

the

sound

produced

by

the

original

source.

In

the

past,

these

problems

have

proved

unsolvable

and

were

thus

relegated

to

a

position

of

secondary

importance

in

audio

system

design.

However,

phase

and

amplitude

integrity

is

essential

to

accurate

sound

reproduction.

Research

shows

that

the

information

which

the

listener

translates

into

the

recognizable

characteristics

of

a

live

performance

are

intimately

tied

into

the

complex

time

and

amplitude

relationships

between

the

fundamental

and

harmonic

components

of

a

given

musical

note

or

sound.

These

relationships

define

a

sound’s

“sound”.

When

these

complex

relationships

pass

through

a

speaker,

the

proper

order

is

lost.

The

higher

frequencies

are

delayed.

A

lower

order

frequency

may

reach

the

listener’s

ear

first

or

perhaps

simultaneously

with

that

of

a

higher

frequency.

In

some

cases,

the

fundamental

components

may

be

so

time-shifted

that

they

can

reach

the

listener’s

ear

ahead

of

some

or

all

the

harmonic

components.

This

change

in

the

phase

and

amplitude

relationship

of

the

harmonic

and

fundamental

frequencies

is

technically

called

“envelope

distortion”.

The

listener

perceives

this

loss

of

sound

integrity

in

the

reproduced

sound

as

“muddy”

and

“smeared”.

In

the

extreme,

it

can

become

difficult

to

tell

the

difference

among

musical

instruments,

for

example,

an

oboe

and

a

clarinet.

BBE

Sound,

Inc.

conducted

extensive

studies

of

numerous

speaker

systems

over

a

ten

year

period.

With

this

knowledge

it

became

possible

to

develop

an

ideal

speaker

and

to

distill

the

corrections

necessary

to

return

the

fundamental

and

harmonic

frequency

structures

to

their

correct

order.

While

there

are

differences

among

various

speaker

designs

in

the

magnitude

of

their

needs

for

correction,

the

overall

pattern

of

correction

needed

is

remarkably

consistent.

The

BBE

™

process

is

so

unique

that

42

patents

have

been

awarded

by

the

U.S.

Patent

Office.

“How

It

Works”

The

BBE

™

process

imparts

a

pre-determined

phase

correction

to

the

high

frequencies

where

most

harmonic

information

exists.

This

is

done

by

breaking

the

signal

into

three

sub-bands

or

groups:

the

low

frequency

group

which

is

crossed

over

at

150Hz,

the

mid-range

group

which

is

crossed

over

at

1200Hz

and

the

high

frequency

group

that

handles

everything

else

up

to

20kHz.

The

low

group

is

delayed

about

2.5

ms

(milliseconds)

via

group

delay

within

a

passive

low

pass

filter.

The

front

panel

control

allows

for

either

a

flat

response

or

a

boost

of

the

lows

at

50Hz.

The

mid-range

group

is

delayed

only

about

0.5

ms

and

passes

through

an

active

band-pass

filter.

The

mid

group

is

used

as

a

point

of

reference

to

make

dynamic

amplitude

corrections

in

both

positive

and

negative

directions

to

the

high

frequency

group

which

has

been

passed

through

a

high

quality

VCA

(Voltage

Controlled

Amplifier).

Two

RMS

average

loudness

detectors

continuously

monitor

both

the

mid-range

and

high

frequencies

to

compare

the

relative

harmonic

content

levels

of

the

two

bands

and

apply

the

appropriate

amount

of

control

voltage

to

the

VCA,

thereby

determining

the

amount

of

high

frequency

harmonic

content

present

at

the

final

output

of

the

BBE

™

processor.

Product

Description

The

BBE

422

is

an

intelligent

audio

processor

designed

to

solve

a

series

of

complex

problems

as

described

in

the

previous

section.

It

is.

however,

very

simple

to

set

up

and

operate

and

once

installed

will

function

flawlessly

without

further

attention.

It

is

a

dual

channel,

rack-mountable

device

for

use

in

-lOdBu

unbalanced

line

level

applications

such

as

those

found

in

semi-

professional

and

musical

instrument

applications.

The

BBE

422

takes

up

one

EIA

standard

rack

space

of

19

inches

width

and

1.75

inches

height

(1U).

There

are

two

completely

separate

channels

to

allow

for

either

full

stereo

program

or

two

independent

mono

channels

such

as

a

house

PA.

mix

feed

for

one

channel

and

the

stage

monitor

feed

for

the

other

channel.

BBE’"

applies

different

phase

correction

algorithms

to

three

separate

frequency

bands.

A

variable

front

panel

control

for

each

channel

allows

the

user

to

adjust

the

amount

of

process

desired.

Using

Your

New

BBE

422

BBE’"

is

a

process

to

be

added

before

all

other

mixing

of

reverb,

special

effects

or

equalization.

The

BBE

422

is

used

to

increase

the

clarity

and

intelligibility

of

the

program

material.

Unlike

many

aural

exciters

or

equalizers,

the

BBE

422

does

not

add

any

extra

noise

or

harmonics

to

the

sound.

Thus,

there

will

be

no

future

problems

in

duplication

or

mastering

caused

by

aberrant

high

frequency

distortion.

Since

the

BBE

™

technology

is

a

single-stage

process

there

is

no

need

for

encoding

or

decoding.

Always

‘A-B”

the

processed

to

unprocessed

sound

with

the

Process

In/Out

switch

to

adjust

the

amount

of

processing

required.

Things

To

Remember

The

BBE

422

is

designed

to

work

in

-

lOdBu

levels.

This

is

suitable

for

most

semi-pro

mixers,

PA.

consoles,

home

stereos

or

disco

equipment.

The

BBE

422

drives

load

impedances

down

to

about

IK

Ohm

and

supplies

a

maximum

level

of

+14dBu.

The

inputs

and

outputs

are

unbalanced

types

and

input

to

the

BBE

422

should

be

kept

at

maximum

level.

Plugging

a

guitar

or

a

microphone

directly

into

the

BBE

422

will

not

work,

as

the

output

level

is

much

too

low.

In

this

application

a

BBE

401

can

be

used

as

it

accepts

low

level

devices.

If

the

program

material

has

excessive

background

noise,

the

noise

may

be

modulated

with

the

program.

In

this

case,

an

equalizer

or

some

type

of

noise

reduction

system

should

be

inserted

in

front

of

the

BBE

422

to

roll

off

the

noise

first.

Post¬

amplification

of

the

BBE

422

is

not

necessary

and

not

recommended,

as

the

BBE

422

can

drive

any

semi-pro

gear

with

-lOdBu

input

to

full

level

directly.

This

assumes

that

the

BBE

422

is

operating

in

the

aforementioned

fashion

with

-lOdBu

input

levels.

WARNING!

It

is

good

practice

to

turn

on

any

effects

boxes

such

as

BBE,

equalizers,

expanders,

surround

sound

accessories,

etc.,

and

the

preamp

BEFORE

turning

on

the

power

amplifier.

Otherwise

damage

to

the

speakers

may

result.

Applications

Various

applications

of

the

BBE

™

process

include:

Music

and

P.A.

System

The

BBE

422

has

become

a

popular

addition

to

many

PA.

systems

because

it

makes

a

drastic

improvement

to

the

clarity

of

the

vocals

without

the

usual

excessive

brightness

associated

with

equalizers.

In

addition,

the

intelligibility

of

the

monitor

mix

is

greatly

improved

with

the

BBE

™

process.

The

BBE

422

is

inserted

between

the

console

output

buss

and

the

next

stage

of

amplification

in

the

PA.

system,

if

the

BBE

™

process

is

desired

on

the

entire

mix.

The

BBE

422

unit

is

placed

before

any

house

graphic

equalizers.

All

pink

noise

checks

should

be

made

with

the

BBE

™

unit

switched

“out”

to

obtain

the

desired

house

curve.

The

BBE

™

process

is

then

dialed

in

to

suit

the

music

production.

Extreme

console

equalization

normally

used

during

live

performance

may

be

reduced

due

to

the

dynamic

enhancement

effect

of

the

BBE

422.

The

BBE

422

is

unbalanced

input

and

output

and

the

user

should

be

aware

of

the

level

and

impedance

of

the

insert

point

to

insure

proper

operation

of

the

BBE

422.

With

this

in

mind,

the

BBE

422

may

be

inserted

in

many

places

within

the

console’s

signal

path

to

achieve

specialized

and

dramatic

result.

In

the

case

of

non-VCA

sub-groups,

the

BBE

422

is

inserted

between

“buss

out”

and

“sub-group

fader

in",

for

the

application

of

the

BBE

™

process

to

a

whole

group

of

vocal

microphones,

for

example.

If

the

BBE

™

process

is

to

be

used

on

only

one

microphone

source,

the

BBE

422

is

inserted

in

the

normal

“insert

send

and

receive”

points

as

a

limiter

or

equalizer

is

patched.

If

the

PA.

mixer

does

not

have

“insert

points”

or

if

the

mixer

is

a

powered-type

unit

without

any

way

of

interrupting

the

signal

path

before

the

power

amplifier,

then

the

BBE

401

unit

should

be

used.

The

BBE

401

accepts

low

levels

direct

from

microphones,

electric

guitars,etc.

and

interfaces

directly

to

the

PA.

mixer.

Figure

1

shows

the

BBE

422

in

a

PA.

system

application

where

the

'A”

channel

is

used

for

the

main

house

mix

and

the

“B”

channel

is

used

for

the

monitor

mix

feed

when

two

different

amounts

of

processing

are

needed

in

each

mix.

Figure

1A

shows

a

powered

mixer

where

the

BBE

422

is

inserted

between

the

program

out

and

the

graphic

equalizer

in.

Home

Studios

The

BBE

422

gives

a

pro-edge

to

otherwise

dull

recordings

on

narrow-track

width

home

recorders.

Snare

drums

and

guitars

take

on

a

brighter

tonal

quality

without

equalization.

Tape

tracks

recorded

without

BBE

™

can

be

processed

after

the

fact

by

placing

the

BBE

422

between

the

tape

track

output

and

the

mixer

channel

input.

The

BBE

422

saves

poorly

recorded

low-level

instruments

and

brightens

them

without

bringing

up

the

tape

hiss

as

equalizers

do.

The

program

transients

are

audibly

improved

on

just

about

any

sound

source,

because

the

BBE

422

reduces

the

mid-range

“smear"

and

the

associated

masking

effects.

Figures

2

and

2A

show

two

applications

of

the

BBE

422

in

a

home

studio.

Figure

2

shows

that

when

recording,

the

BBE

422

is

inserted

between

“buss

out"

and

“tape

track

in".

By

monitoring

the

tape

track,

the

amount

of

processing

can

be

adjusted

to

suit

your

needs.

Figure

2A

shows

that

when

in

playback,

the

BBE

422

process

can

be

applied

to

a

previously

recorded

tape

track

by

inserting

the

BBE

422

between

the

tape

track

output

and

the

mixer

line

input.

This

is

a

mixdown

set

up

and

can

help

restore

lost

clarity.

Cassette

Copies

Since

the

BBE

422

is

a

single-ended

playback

process

without

encoding

or

decoding,

the

stereo

BBE

422

is

inserted

between

the

master

two-track

and

the

cassette

recorder

for

punchier

and

crisper

cassette

copies.

If

you

are

very

careful

of

the

amount

of

processing

you

are

using

and

know

the

material,

you

should

never

have

any

trouble

with

“thin”

sounding

copies.

Figure

3

shows

the

BBE

422

in

the

cassette

copy

mode.

Industrial

The

BBE

422

greatly

improves

intelligibly

in

speech

or

music

by

improving

the

attack

of

the

consonants

that

the

human

ear

needs

in

order

to

recognize

the

difference

between

like

sounding

words

and

syllables.

This

makes

the

BBE

422

a

natural

for

public

address,

intercom

or

wide

area

dispersion

of

pre-recorded

music

or

voice

announcements

over

an

existing

old

and

dull

loudspeaker

system.

Figure

4

shows

the

BBE

422

inserted

between

the

telephone

matching

adapter

and

the

auxiliary

input

to

the

public

address

intercom

amplifier.

Plugging

a

microphone

directly

into

the

BBE

422

will

not

work.

If

the

existing

PA.

amplifier

has

no

provision

for

auxiliary

input,

then

the

BBE

401

unit

should

be

used.

The

BBE

401

accepts

a

microphone

directly

and

then

interfaces

with

an

existing

P.A.

amplifier

without

costly

on-site

modifications.

The

Controls

Operation

of

the

BBE

422

is

quite

simple

due

to

the

sophisticated

circuitry

within

the

unit.

Below

are

the

names

and

purposes

of

each

control

on

the

BBE

422.

Lo

Contour

Control

Definition

Control

Hi

Contour

LED

stack

Function

Switch

Power

Switch

Rear

Panel

AC

Power

Cord

Fuse

Remote

Jack

Hl-Z

Unbalanced

W'

or

RCA

Output

Hl-Z

Unbalanced

V«"

or

RCA

Input

Each

channel

has

a

lo

contour

control

that

regulates

the

amount

of

phase

compensated

bass

equalization.

This

adjustment

ranges

from

-lOdBu

(fully

counterclockwise)

to

+fOdBu

(fully

clockwise)

at

50Hz

relative

to

the

input.

The

middle

position

is

flat

or

unity

gain.

Each

channel

has

a

definition

control

that

regulates

the

amount

of

amplitude

compensation

as

indicated

by

the

hi

contour

LED

stack.

The

minimum

(fully

counterclockwise)

position

yields

a

flat

frequency

response

with

phase

compensation

only.

Turning

clockwise

increases

the

amplitude

of

the

high

frequency

band

relative

to

the

mid

band

amplitude

providing

an

improved

spectral

balance

between

the

high

and

mid

bands.

Each

channel

is

equipped

with

a

set

of

LED

indicators

that

instantly

show

the

relative

amount

of

high

band

compensation

compared

to

the

mid

band.

1)

RED

LED

(marked

“

-

”):

Compression

mode.

The

amplitude

of

the

high

band

is

too

high

compared

to

the

mid

band

and

compression

is

being

applied

to

compensate.

2)

AMBER

LED

(marked

“O”):

Flat

mode.

No

amplitude

compensation

is

needed.

The

program

spectral

content

is

correct.

3)

GREEN

LED

(marked

“

+"):

Expansion

mode.

The

amplitude

of

the

high

band

is

too

low

compared

to

the

mid

band

and

the

amplitude

of

the

high

band

is

being

expanded

to

compensate.

4)

CLIP

LED:

This

LED

indicates

that

the

output

of

the

BBE

422

has

reached

the

maximum

input

level

of

+

16dBu.

Each

channel

is

equipped

with

a

function

push-button

switch

which

allows

for

a

quick

com¬

parison

of

processed

with

unprocessed

sound.

When

the

switch

is

depressed,

the

green

“In"

LED

lights.

When

the

switch

is

out,

the

amber

“Out”

LED

lights.

This

switch

controls

primary

power

to

the

BBE

422.

Plugs

into

AC

power

receptacle.

Turn

cap

on

fuse

holder

counterclockwise

to

remove

fuse.

(Note:

replace

with

250Vac,

V

2

A

type

fuse.)

An

additional

W'

jack

is

provided

for

remote

actuation

of

the

function

switch.

Any

push-on/push-

off

single

pole

switch

will

work

as

a

remote.

The

front

panel

function

switch

must

be

in

the

process

position

in

order

for

this

jack

to

operate.

Each

channel

is

equipped

with

a

W'

phone

jack

or

an

RCA

jack

that

is

a

high

impedance

unbalanced

line

level

output

and

can

deliver

up

to

+

16dBu

into

10k

ohms.

Each

channel

is

equipped

with

a

'A"

phone

jack

or

RCA

jack

that

accepts

a

high

impedance

unbalanced

line

level

input

with

an

average

level

of

OdBu.

(Note:

+

16dBu

is

the

maximum

input

before

clipping.)

Set-Up

The

BBE

422

is

connected

into

the

audio

chain

in

series

with

the

signal

path

—

the

same

way

a

graphic

equalizer

or

limiter

is

connected.

The

output

of

the

mixer,

pre-amp

or

tape

recorder

feeds

the

input

of

the

BBE

422.

Remember,

outputs

connect

to

inputs

and

as

long

as

the

signal

source

level

is

within

the

nominal

range

as

mentioned

in

the

previous

section,

the

BBE

422

will

function

perfectly.

Setting-up

and

using

the

BBE

422

as

an

echo

send

device

like

a

digital

reverb

is

not

recommended.

The

processing

effect

is

not

fully

realized

when

the

output

of

the

BBE

422

is

summed

with

the

original

source

audio.

The

BBE

422

also

has

an

additional

quarter

inch

jack

for

remote

actuation

of

the

process

in/out

switch.

Any

single-pole,

single-throw

switch,

such

as

a

footswitch,

will

work.

Calibration

Procedure

for

the

BBE

™

Model

422

Equipment

Required:

Audio

Signal

Generator

(sine

wave)

Digital

Voltmeter

(DVM)

This

procedure

details

the

calibration

of

channel

A.

Comments

[in

brackets]

pertain

to

channel

B.

All

tests

are

done

with

a

signal

level

of

OdBu

(,775Vrms)

except

for

the

clip

indicator

check.

The

signal

will

be

input

into

the

'A"

connector

marked

INPUT.

The

DVM

shall

monitor

the

'A"

connector

of

each

corresponding

channel

marked

OUTPUT.

(Note:

The

L

&

R

after

the

part

reference

number

designates

Left

(A)

and

Right

(B).)

Initial

Settings:

1.

Definition

controls

(VR5L

&

VR5R)

to

minimum.

2.

All

other

potentiometers

to

their

middle

positions.

3.

Power

switch

on

and

FUNCTION

switch

IN

(process

on).

Procedure:

Power

Supply

Test:

1.

With

DVM

set

to

DC

volts,

measure

pin-4

of

U2.

You

should

read

+

12Vdc

(±0.5Vdc).

2.

With

DVM

set

to

DC

volts,

measure

pin-11

of

U2.

You

should

read

-

12Vdc

(±0.5Vdc).

Offset

Adjustment:

1.

With

no

signal

present

at

the

input

(open),

measure

TP1L

[TP1R]

with

the

DVM

set

to

DC

volts.

2.

Adjust

VR6L

[VR6R]

until

DVM

reads

O.OOVdc.

Unity

Adjustment:

1.

Input

a

500Hz

signal

(@

OdBu)

into

the

connector

marked

CHANNEL

A

[B]

INPUT.

2.

Measure

the

connector

marked

OUTPUT

CHANNEL

A

[B]

with

the

DVM

set

to

AC

volts.

3.

Adjust

VR3L

[VR3R]

until

the

DVM

reads

OdBu.

4.

Set

generator

to

5000Hz

(OdBu).

5.

Adjust

VR4L

[VR4R]

until

the

DVM

reads

OdBu.

6.

Repeat

steps

1

thru

5

until

readings

are

correct

since

some

interaction

exists.

Lo-Contour

Test:

1.

Input

a

50Hz

signal

(@

OdBu)

into

the

connector

marked

CHANNEL

A

[B]

INPUT.

2.

Measure

the

connector

marked

OUTPUT

CHANNEL

A

[B]

with

the

DVM

set

to

AC

volts.

3.

Turn

the

LO-CONTOUR

control

completely

clockwise

(marked

“

+

”).

The

DVM

should

read

approximately

+

lOdBu.

4.

Turn

the

LO-CONTOUR

control

completely

counterclockwise

(marked

“

-

”).

The

DVM

should

read

approximately

-

lOdBu.

5.

Turn

the

control

to

the

middle

position

(marked

“0”).

The

DVM

should

read

approximately

OdBu

or

flat

response.

Detector

Balance:

(Note:

The

DEFINITION

control

must

be

completely

minimum.)

1.

Input

a

500Hz

signal

(@

OdBu)

into

the

connector

marked

CHANNEL

A

[B]

INPUT.

2.

Measure

TP1L

[TP1R]

with

DVM

set

to

DC

volts

and

adjust

VR1L

[VR1R]

until

meter

reads

-1

.OOVdc.

Bypass

Test:

1.

Switch

the

FUNCTION

switch

OUT

(bypass

mode).

2.

Input

a

500Hz

signal

(@

OdBu)

into

the

connector

marked

CHANNEL

A

[B]

INPUT.

3.

Measure

the

connector

marked

OUTPUT

CHANNEL

A

[B]

with

the

DVM

set

to

AC

volts.

4.

The

DVM

should

read

OdBu

(±0.5dBu).

5.

Return

the

FUNCTION

switch

to

the

IN

position

(process

mode).

Remote

Test*

1.

Switch

the

FUNCTION

switch

to

the

IN

position.

2.

Plug

into

the

connector

marked

REMOTE

a

'A"

shorting

jack.

3.

Ensure

the

FUNCTION

changes

to

OUT

or

bypass.

LED

Test:

1.

Input

a

500Hz

signal

(@

OdBu)

into

the

connector

marked

CHANNEL

A

[B]

INPUT.

2.

With

the

DEFINITION

control

to

minimum,

the

amber

HIGH

CONTOUR

LED

(marked

“0")

should

be

lit.

3.

Turn

the

DEFINITION

control

to

maximum,

the

green

HIGH

CONTOUR

LED

(marked

“

+")

should

be

lit.

4.

Set

generator

to

5000Hz.

5.

Turn

the

DEFINITION

control

to

maximum

the

red

HIGH

CONTOUR

LED

(marked

“

-

”)

should

be

lit.

6.

With

the

FUNCTION

switched

to

the

IN

position

the

corresponding

green

LED

should

be

lit.

7.

With

the

FUNCTION

switched

to

the

OUT

position,

the

corresponding

amber

LED

should

be

lit.

Clip

Indicator

Test:

1.

Input

a

500Hz

signal

with

an

amplitude

of

+16dBu

(4.887Vrms)

into

the

connector

marked

INPUT

CHANNEL

A

[Bj.

Ensure

the

corresponding

CLIP

LED

is

fully

lit

for

each

channel.

RCA

Connector

Test:

1.

Ensure

the

RCA

connectors

function

the

same

as

the

W'

phone

jacks

since

they

are

connected

in

parallel.

END

TEST

Specifications

BBE

422

Frequency

Response

Bypass

DC

to

20kHz

Process

Mode

program

controlled

Power

Requirements

120

VAC

(nominal)

50/60Hz

10

Watts

(220VAC

available)

A/C

Line

fused

protected

Noise

in

Process

Mode

-

90dBu

below

rated

max

output

of

+

14dBu

Total

Harmonic

Distortion

in

Process

Mode

less

than

0.1%

@

1kHz

@

-

lOdBu

Level

Input

Characteristics

Input

Impedance

50K

Ohms

Nominal

Input

Level

-

lOdBu

Maximum

Input

Level

+14dBu

Output

Characteristics

Minimum

Load

Impedance

for

full

output

level

1K

Ohm

Nomimal

Output

Level

-

lOdBu

Maximum

Output

Level

+

14dBu

Terminations/Connectors

Rear

Panel

RCA

Jacks

and

'A"

Phone

Jacks

Dimensions

1

%"

H

x

17"

W

x

5

3

/4"

D

Standard

1U

single

rack

Weight

4'/2

lbs.

(2.5Kgs)

NOTE:

OdBu

=

0.775

Vrms

Service

We

recommend

that

If

at

all

possible

a

BBE

422

which

requires

repair

be

sent

to

our

facility

in

Huntington

Beach,

CA.

We

request

that

a

"Return

Authorization"

be

issued

by

the

dealer

from

whom

you

purchased

the

unit.

If

this

is

not

possible,

call

BBE

Sound.

Inc.

directly

to

obtain

a

“Return

Authorization”

and

include

with

the

unit

a

copy

of

the

bill

of

sale

so

that

this

process

can

be

expedited.

As

the

repair

turnaround

time

is

minimal,

we

request

that

the

unit

be

sent

to

BBE

Sound,

Inc.

We

also

need

to

add

reliability

data

to

our

files

so

that

future

revisions

may

be

undertaken

if

necessary

to

improve

the

product.

Warranty

The

BBE

422

Processor

is

warranted

against

defects

in

material

and

workmanship

for

a

period

of

one

(1)

year

from

date

of

purchase

from

BBE

Sound.

Inc.

or

from

an

authorized

dealer.

During

this

period,

we

will

repair

units

free

of

charge

providing

that

they

are

shipped

pre-paid

to

BBE

Sound,

Inc.,

5500

Bolsa

Ave..

Suite

245.

Huntington

Beach.

CA

92649.

We

will

pay

return

UPS

shipping

charges

within

the

U.S.A.

All

charges

related

to

non-U.S.

shipping,

including

customs

clearance,

will

be

billed.

This

warranty

will

be

considered

null

and

void

by

BBE

Sound.

Inc.

if

any

of

the

following

is

found:

1.

Equipment

has

been

physically

damaged.

2.

Equipment

shows

sign

of

abuse.

3

The

equipment

has

been

electrically

damaged

by

improper

connection

or

attempted

repair

by

the

customer

or

a

third

party.

4

The

equipment

has

been

modified

without

authorization.

5

The

bill

of

sale

indicates

that

the

purchase

date

of

the

equipment

is

not

within

the

warranty

period.

BBE

Sound.

Inc.

is

NOT

LIABLE

FOR

CONSEQUENTIAL

DAMAGES.

Should

the

processor

fail

to

operate

for

any

reason,

our

sole

obligation

is

to

repair

the

unit

as

described

above.

Maintenance

Maintenance

of

the

BBE

422

is

limited

to

proper

cleaning

of

the

unit

with

mild

household

cleaner

such

as

Formula

409®

or

Windex

™

.

The

chassis

and

cover

are

steel

finished

with

a

durable

polyurethane

paint,

while

the

front

panel

is

an

anodized

aluminum

extrusion.

There

are

no

user

replaceable

parts

and

the

unit

should

not

be

opened

for

any

reason

unless

you

are

a

qualified

technician.

Calibration

should

be

performed

if

parts

are

replaced

or

if

a

performance

check-out

indicates

a

problem

with

calibration.

Long

term

use

has

shown

that

over

the

life

of

this

unit

there

is

little

or

no

drift

of

the

components

in

the

BBE

422

which

would

cause

a

change

in

calibration.

A

very

conservative

design

philosophy

has

resulted

in

a

piece

of

equipment

which

runs

very

cool

and

should

give

years

of

trouble-free

service.

Calibration

Procedure

for

the

BBE

™

Model

422

Equipment

Required:

Audio

Signal

Generator

(sine

wave)

Digital

Voltmeter

(DVM)

This

procedure

details

the

calibration

of

channel

A.

Comments

[in

brackets]

pertain

to

channel

B.

All

tests

are

done

with

a

signal

level

of

OdBu

(,775Vrms)

except

for

the

clip

indicator

check.

The

signal

will

be

input

into

the

!4"

connector

marked

INPUT

The

DVM

shall

monitor

the

'A"

connector

of

each

corresponding

channel

marked

OUTPUT.

(Note:

The

L

&

R

after

the

part

reference

number

designates

Left

(A)

and

Right

(B).)

Initial

Settings:

1.

Definition

controls

(VR5L

&

VR5R)

to

minimum.

2.

All

other

potentiometers

to

their

middle

positions.

3.

Power

switch

on

and

FUNCTION

switch

IN

(process

on).

Procedure:

Power

Supply

Test:

1.

With

DVM

set

to

DC

volts,

measure

pin-4

of

U2.

You

should

read

+

12Vdc

(±0.5Vdc).

2.

With

DVM

set

to

DC

volts,

measure

pin-11

of

U2.

You

should

read

-12Vdc

(±

0.5Vdc).

Offset

Adjustment:

1.

With

no

signal

present

at

the

input

(open),

measure

TP1L

[TP1R]

with

the

DVM

set

to

DC

volts.

2.

Adjust

VR6L

[VR6R]

until

DVM

reads

O.OOVdc.

Unity

Adjustment:

1.

Input

a

500Hz

signal

(@

OdBu)

into

the

connector

marked

CHANNEL

A

[B]

INPUT.

2.

Measure

the

connector

marked

OUTPUT

CHANNEL

A

[B]

with

the

DVM

set

to

AC

volts.

3.

Adjust

VR3L

[VR3R]

until

the

DVM

reads

OdBu.

4.

Set

generator

to

5000Hz

(OdBu).

5.

Adjust

VR4L

[VR4R]

until

the

DVM

reads

OdBu.

6.

Repeat

steps

1

thru

5

until

readings

are

correct

since

some

interaction

exists.

Lo-Contour

Test:

1.

Input

a

50Hz

signal

(@

OdBu)

into

the

connector

marked

CHANNEL

A

[B]

INPUT.

2.

Measure

the

connector

marked

OUTPUT

CHANNEL

A

[B]

with

the

DVM

set

to

AC

volts.

3.

Turn

the

LO-CONTOUR

control

completely

clockwise

(marked

“

+

The

DVM

should

read

approximately

+

lOdBu.

4.

Turn

the

LO-CONTOUR

control

completely

counterclockwise

(marked

“

-

’’).

The

DVM

should

read

approximately

-10dBu.

5.

Turn

the

control

to

the

middle

position

(marked

“0”).

The

DVM

should

read

approximately

OdBu

or

flat

response.

Detector

Balance:

(Note:

The

DEFINITION

control

must

be

completely

minimum.)

1.

Input

a

500Hz

signal

(@

OdBu)

into

the

connector

marked

CHANNEL

A

[B]

INPUT.

2.

Measure

TP1L

[TP1R]

with

DVM

set

to

DC

volts

and

adjust

VR1L

[VR1R]

until

meter

reads

-1

.OOVdc.

Bypass

Test:

1.

Switch

the

FUNCTION

switch

OUT

(bypass

mode).

2.

Input

a

500Hz

signal

(@

OdBu)

into

the

connector

marked

CHANNEL

A

[B]

INPUT.

3.

Measure

the

connector

marked

OUTPUT

CHANNEL

A

[B]

with

the

DVM

set

to

AC

volts.

4.

The

DVM

should

read

OdBu

(±0.5dBu).

5.

Return

the

FUNCTION

switch

to

the

IN

position

(process

mode).

Remote

Test:

1.

Switch

the

FUNCTION

switch

to

the

IN

position.

2.

Plug

into

the

connector

marked

REMOTE

a

'A"

shorting

jack.

3.

Ensure

the

FUNCTION

changes

to

OUT

or

bypass.

LED

Test:

1.

Input

a

500Hz

signal

(@

OdBu)

into

the

connector

marked

CHANNEL

A

[B]

INPUT.

2.

With

the

DEFINITION

control

to

minimum,

the

amber

HIGH

CONTOUR

LED

(marked

“0")

should

be

lit.

3.

Turn

the

DEFINITION

control

to

maximum,

the

green

HIGH

CONTOUR

LED

(marked

“

+

”)

should

be

lit.

4.

Set

generator

to

5000Hz.

5.

Turn

the

DEFINITION

control

to

maximum

the

red

HIGH

CONTOUR

LED

(marked

“

-

”)

should

be

lit.

6.

With

the

FUNCTION

switched

to

the

IN

position

the

corresponding

green

LED

should

be

lit.

7.

With

the

FUNCTION

switched

to

the

OUT

position,

the

corresponding

amber

LED

should

be

lit.

Clip

Indicator

Test:

1.

Input

a

500Hz

signal

with

an

amplitude

of

+

16dBu

(4.887Vrms)

into

the

connector

marked

INPUT

CHANNEL

A

[Bj.

Ensure

the

corresponding

CLIP

LED

is

fully

lit

for

each

channel.

RCA

Connector

Test:

1.

Ensure

the

RCA

connectors

function

the

same

as

the

'A"

phone

jacks

since

they

are

connected

in

parallel.

END

TEST

FIGURE

1

LIVE

SOUND

SYSTEM

n

L

1

1

1

□

□

□

□

D

□

D

Q

□

□

□

□

□

□

SYNTHESIZER

DIRECT

BOX

©

©

©

©

©

©

©

©

(A)

©

©

¥

©

¥]

©

©

©

©

©

©

©

©

©

©

j

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j

9|

J

iL

MIXING

CONSOLE

MAIN

OUT

(HOUSE)

OUT

IN

OUT

b_

IN

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po

6°

c

JO

MONITOR

OUT

422

POWER

AMPLIFIER

©

©

POWER

AMPLIFIER

HOUSE

MONITOR