Pioneer RG-2 User manual

Table of contents

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RG

DYNAMIC

PROCESSOR

1h

pp

2oSBlLT

Mm

MPIONEER'

G-2

OPERATING

INSTRUCTIONS

SPECIFICATIONS

Semiconductors

Ics

4

Transistors

F)

Diodes

30

Processor

Section

Maximum

Output

Vohiage

ON

(Ik,

T-H.D.:0.5%

Ry

:A7K2,

DYNAMIC

EXPANSION:

16dB)

‘Total

Harmonie

Distortion

0.08%

(Qutput:1¥,

kHz,

DYNAMIC

EXPANSION

1643)

Dynamic

Expansion

4,7,10,

13,1648

Gain

tees

a

DYNAMIC

|

yay

EXPANSION)

Upward

Gain|

+248

[

Dovoward

Impulse

Response

Attack

Time

Release

Time

Input

Impedance

4aB

|

+68

|

+8dB

2B

348

i

T

+10dB

4dB

|

SB

648

03mse:

120msee

SKS?

(20H7

to

20kHa)

Ss

S/G

Before

turning

on

the

power,

please

confirm

the

setting

of

the

line

VOLTAGE

SELECTOR

switch

on

the

rear

panel.

If

it

is

not

set

properly,

change

the

seiting

of

it

according

to

the

LINE

VOLTAGE

SELECTOR

SWITCH

on

page

3.

NOTE:

‘These

operating

instructions

apply

to

two

nersions

of

the

RG-2,

The

KG-2/8/G

model

1s

supplied

with

the

rack

mount

adaptors

as

an

accessory,

while

RG-2/8

model

ie

‘tot

supplied

with

it

How

to

anstall

the

rack

mount

odap-

tore

is

deserdbed

on

page

8

‘Output

Impedance

3000

(1H)

Residual

Noise

roy

(HF

A,

DYNAMIC

EXPANSION:

16d)

‘Signal

to

Noise Ratlo

(IHF

A,

Shortcrcuited,

DYNAMIC

EXPANSION:

1648)

1006

(at

1¥]

116dB

(at

6.5¥)

Miscellaneous

Power

Requirements.

Hovp1zovi220v/240v

(switchable),

50/6042

.

108

1

g20(i)99{11336(D}mm

16:3)

6(W|x3-7/8(1i)x1

3+

/4(D)in

4g

(9Ib

102)

Power

Consumption

Dimensions

Weight

(without

package)

Furnished

Parts

Connection

cord

with

pin

plugs

2

Operating

instructions

Rack

mount

adaptors

(5/6

model

only),

Nore:

Specifications

and

the

design

subject

to

possible

modifica

tion

without

notice

due

to

improvements

CONTENTS

Specifications

........

Li

fOpatition

saceits

caccrtenait

vas

6

Features

2

Using

A

Tape

Deck

é

6

Rear

Pane)

Facilities

8

For

Maximum

Enjoyment

.......

6

Installation

Precautions

3

RG-2Technical

Outline

.........

7

Connections

.

4

chematic

Diagram

.........++++++

Insertion

Front

Panel

Facilities

5

Modern

recording

uses

three

dynamic

control

dynamic

distrotion

in

esch

of

these

areas,

increas

techniques

which

may

detract

from

the

original

ing

the

contrast.

and

virtually

restoring

the

original

dynamic

range;

reduction

of

transient

peaks,

over-

live

program,

In

order

to

obtain

maximum

benefit

all

compression

of

loud

levels

and

upward

mani-

from

this

unit,

please

read

the

following

instru.

pulation

of

soft

levels.

The

RG-2

will

correct

tions

carefully

FEATURES

Broadens

Dynamic

Range

that

lower

frecuency

instruments

are

also

enhanced,

The

dynamic

range

of

the

music

source

can

be

expanded

Design

Oriented

toward

High

S/N

and

Low

by

employing

the

RG-2

asasieren

system

adaptor

unit.

No

Distortion

preprocessing

is

needed

and

only

ordinary

program

sources,

such

as

records,

FM

broadcasts

or

tape

music

ate

requited

‘The

dynamic

range

4s

brcadened

by

upward

and

downs

‘expansion,

resulting

in

a

powerful

and

sharp

rendition

of

¥¢

source.This

has

the

effect

of

bringing

perfortners

right

into

the

listening

room,

and

especially

pulsive

sources

such

as

rock

and

soul

ae

given

a

broad

new

dimension.

The

gain

conticl

amplifier

adopts

low-noise

differentia!

transistors

and low-neise

ICS

for

a

Sgnaktonoise

ratio

of

1004B

and

a

total

harmonic

distortion

of

0.05%

Further

ore,

the

sensor

section

is

also

equipped

with

low-noise

transistors

in

order

to

keep

the

noise

in

the

control

curtent

‘down

to

the

bare

minimum.

S-Stage

Dynamic

Expansion

Selector

‘The

expansion

in

the

dynamic

range

can

be

switehed

in

3dB

steps

from

4B

to

16¢B

with

this

Setting

selector.

By

combining

the

upward

and

downward

expansion,

it

is

possible

to

produce

the

optimum

expansion

in

the

dynamic

range

and

also

to

select

the

expansion

according

to

the

Noise

Reduction

Effect

ruse

soures

and

your

individual

taste,

A

noise

reduction

effect

is

also

included

which

reduces

namic

Expansion

with

Fluroscan

Display

underiying

source

noise.

Tape

hiss,

motor

rumble

and

other

By

mie

soe

ee

background

noisos

are

reduced

by

the

circuit

properties

of

this

unit,

so

that

low

noise,

exciting

stereo

sound

ean

been.

joyed.

Faithful

Reproduction

Funct

The

sensor

section

which

produces

the

control

signal

is

Provided

with

an

energy

cistibuticn

filter,

to

ersure

that

Preserves

Natural

Impression

‘Atiack

and

release

characteristics

of

the

audio

signal

are

preserved

by

a

fast

and

slow

response

(mixed)

double

ac:

ton

control

signal

that

prevents

unnatural

impressions

in

the

reproduced

sound.

Fluroscan

is

incorporated

for

the

meter

which

indicates

the

degree

of

the

dynamic

range's

expansion.

This

new

kind

of

display

accurately

tracks

the

processing

action

and

it

allows

readout

of

the

expansion

at

exch

instantin

dB,

Smart,

Slimly

Designed

Styling

The

processor

has

been

slimly

designed

with

the

dynam

ic

expansion

moter,

which

employs

a

Fluroscan

display,

in

the

center

for

a

clean,

fresh look.

The

height

dimension

of

the

front

panel

conforms

to

the

F1A*

standard

2U

size

format.

Using

the

optional

rack

mount

adaptors

(JA-R1O4),

the

processor

can

be

installed

in

a

rack

confarming

to

ELA,

the

expansion

function

is

not

rigged

by

noise

components,

However,

expansion

is

not

limited

to

instruments,

whose

fundamental

frequency

is

close

to

the

center

frequency

of

the

energy

distribution

filter,

since

all

musical

instruments

Produce

harmonics

which

are

strongest

when

the

insiru-

(Ye

PrOtser

ment

Is

played

hard.

Hence

these

harmonics

activate

the

ene

semsing

citcuit

and

control

the

degree

of

expansion,

so

The

rack

mount

adaptors

are

equipped

withS/0

mode!

6s

2

“EIA:

Electronic

Industries

Association

PIONEER

REAR

PANEL

FACILITIES

fo)

ia

if

@

®

}

@

PROCESSOR

INPUT

JACKS

1.

Prepare

a

medium

size

screwdriver.

‘Connect

these

jacks

10

the

TAPE

REC

jacks

on

the

stereo

2

Insort

the

screwdriver

into

the

arrow

on

the

voltage

amplifier

or

o

the

PREAMP

OUT

(OUTPUT)

jacks

on

the

selector

and

adjust

so

that

the

tip

of

the

arrow

points

pebeaatin

to

the

voltage

value

of

your

area

as

shown

below.

PROCESSOR

OUTPUT

JACKS

een

Connect

these

jacks

10

the

TAPE

PLAY

jacks

on

the

siereo

amplifier

or

tw

the

POWER

AMP

IN

(INPUT)

jacks

on

the

power

amplifier.

@®

TAPE

REC

JACKS,

f

Connect

these

16

the

INPUT

(REC)

jackson

the

tape

deck

p

@

TAPE

PLAY

JACKS

™

sexencsives

Connect

these

to

the

OUTPUT

(PLAY)

jacks

on

the

tape

deck,

©

ACOUTLET

®

LINE

VOLTAGE

SELECTOR

SWITCH

‘This

s

an

auxiliary

power

outlet.

Connect

the

power

plug

‘Check

that

the

indication

of

the

switch

is

same

as

your

‘of

your

tape

deck

oF

other

stefeo

hi-fi

component

to

this

residence

before

plugging

the

power

cord

into

the

outlet

‘outlet.

Ic

is

not

coupled

with

the

power

switch

on

the

I

it

ist

or

if

you

move

to

an

area

where

the

voltage

model

RG-2

(UNSWITCHED],

The

maximum

power

ca:

requirements

differ,

change

the

switch

setting

as

follows,

pacity

's

1O0W

and

so

do

not

connect

electrical

appliances

Before

adjusting,

disconnect

the

power

cord

‘with

a

power

capacity

exceeding

this

value

INSTALLATION

PRECAUTIONS

‘To

ensure

the

best

sound

quality

and

touble-tree

operation,

avoid

setting

up

the

RG

dynamic

processor

in

any

of

the

locations

described

below:

‘Locations

lable

o

downgrade

parformence

Resulting

vouble

1

Leeatons

expaaed

e

direct

suriight,

or

naar

heaters

1

sternal

heat

causes

dha

perlornance

ofthe

latranie

pare

to

‘eteriorae,

and

operation

becomes

unstadte

2.

Locations

with

poor

ventilation,

with

hich

humidity

or

mois-

|

2,

Caute

of

faulty

contact

in

inout-outeut

terminal,

and

vst.

|

‘ure

contents,

oF

dusty

Lecavons

‘High

nomidity

and

a

igh

molrtor

cortent

caste

deteriorston

Jn

insulation,

‘Thar

ie

ao

tho

dangor

of

eurent

loskage

end

heat

eeneretion

in

the

ctcut

pars,

Dust

or

arouse

in

the

rota

5.

Locations

suscaptbve

to

vibration

3.

These

locations

efost

tne

precsion

pars

aavessly

CONNECTIONS

CONNECTION

DIAGRAM

Turntable

Tuner

Tope

deck

[eae

Toput

|

[Outeoe

=r

©

"00108000

Stereo

arplitien

‘Spear

‘Sponker

FY

CONNECTIONS

TO

STEREO

AMPLIFIER

Site

amolitir

Use

the

accessory

connecting

cords

to

connect

the

2

PROCESSOR

INPUT

and

PROCESSOR

OUTPUT

Jacks

on

the

RG-2

to

the

TAPE

REC

and

TAPE

PLAY

jacks

on

a

stereo

amplifier

(Pig.

1).

Take

care

not

to

reverse

L

(left)

and

R

(right)

channels,

and

make

sure

connections

securely

‘TAPE

DECK

CONNECTIONS

Since

the

RG-2

is

connected

to

the

TAPE

REC

and

PLAY

jacks

of

the

stereo

amplifier,

a

tape

recorder

cannot

be

connected

if

the

stereo

amplifier

is

pro-

vided

with

only

one

set

of

tape

jacks.

In

this

case,

connect

the

input

and

output

jecks

of

the

tape

deck

to

the

TAPE

REC

and

PLAY

jacks

of

the

RG2

Connections

for

recording

Connect

the

recording

input

jacks

(INPUT)

on

the

tape

deck

to

the

TAPE

REC

jacks

on

the

RG.2.

Conneetions

for

playback

Connect

the

playback

output

jacks

(OUTPUT)

on

the

tape

deck

to

the

TAPE

PLAY

jacks

on

the

RG2

Faaorcng

onTaTTOE

‘wes

Fig.

1

FRONT

PANEL

FACILITIES

OQ ®@

@

®

BIONEER

(ft

@

POWER

SWITCH

Power

is

supplied

to

the

model

RG-2

when

this

switch

is

depressed,

The

power

Indicator

comes

on

2s

soort as

the

ower

Is

supalied,

®

POWER

INDICATOR

This

comes

on

as

soon

as

the

RG-2's

power

switch

|S

Set

to

ON

to

indicate

that

power

i

being

supplied.

@

DYNAMIC

EXPANSION

METER

This

meter

allows

you

to

read

out

the

gain

boest

with

respect

to

the

Input

signal

In

cecibels.

(See

additional

description

on

page

6).

@

DYNAMIC

EXPANSION

INDICATORS.

The

4aB,

768,

10dB, 1348,

1646

indicators

light

up

in

accordance

with

the

position

of

the

dynamic

expansion

selector.

®

PROCESSOR

SWITCH

Depress

this

switch

(ON)

to

produce

an

expansion

effect

with

the

signals

fed

from

the

PROCESSOR

INPUT

jacks,

The

dynamic

expansion

indicator

will

come

on,

and

signals

featuring

an

expansion

effect

only

will

be

fed

out

from

the

model

RG-2’s

OUTPUT

jacks.

in

the

OFF

pos:

ton,

the

RG-2

circuitry

is

bypassed.

This

position

allows

for

instant

comparison

between

the

expanded

and

te

un

processed

signals

NOTE:

Whon

the

RG-2'

power

aitch

is

set

10

the

OFK

post

tion

and

the

processor

switch

Is

also

set

to

OFF,

the

signal

whioh

has

bypassed

the

procesior

ereuitry

is

made

valeble

ai

the

OUTPUT

jacks,

There

will,

however,

be

to

output

if

the

input

level

control

is

set

fo

the

‘0!

post

Vian.

Make

sure

that

this

control

te

set

to

the

‘10

Dost-

@

TAPE

MONITOR

INDICATOR

This

comes

on

when

the

tape

mi

TAPE

MONITOR

SWITCH

Depress

this

switch

to

monitor

the

sound

on

the

tape

as

it

's

being

recorded

or

when

playing

back

a

tape

using

a

wpe

deck

connected

to

the

RG-2's

TAPE

jacks.

(The

tape

‘monitor

indicator

comes

on.)

Set

the

switch

to

OFF

when

@®

DYNAMIC

EXPANSION

SELECTOR

This

selector

selects

maximum

gain

boost

value

with

re-

spect

to

the

input

level,

i.e:

ratio

of

gain

increase

be

‘ween

large

input

signal

and

small

input

signal.

Maximaura

gain

boost

increases

as

the

sclector

is

tamed

clockwise.

Set

the

selector

to

the

most

desirable

position

while

listening

to

the

reproduced

sound

itor

switch

isdepressed.

Dynamic

Expansion

Dynamic

expantion

is

defined

o%

the

sum

of

the

down

tward

expansion

(where

amail

inputs

ere

expanded

down)

‘and

upland

expansion

(where

lenge

impute

are

expanded

up|.

For

details,

refer

10

“Technical

Outline"

on

pase

7.

@

INPUT

LEVEL

CONTROL

Use

this

control

to

adjust

the

input

level

at

which

the

ox

pansion

effect

is

initiated.

Clockwise

rotation

increases

the

expansion

with

rospoct

to

small

signal

levels

jinereases

expansion

sensitivity),

Adjust

the

control

for

desired

effect

according

to

program

source

2

OPERATION

PRIOR

TO

SWITCHING

POWER

ON

Set the

controls

and

switches

to

the

following

posi-

tions

before

operating

the

model

RG-2.

L,

Set

the

dynamic

expansion

selector

to

10.

2,

Set

the

input

level

control

to

the

center

position

(5).

3,

Set

the

tape

monitor

switch

to

OFF

(released).

4,

Set

the

processor

switch

to

OFF

(released).

5,

Set

the

tape

monitor

switeh

(which

is

related

to

the

‘TAPE

jacks

connecting

the

RG-2)

on

the

stereo

amplifier

to

ON.

OPERATION

PROCEDURE

1,

Play

the

program

source

on

the

stereo

amplifier,

and

listen

to

the

sound

without

the

expansion

effect.

2,

Depress

the

processor

switch

(ON).

3.

Rotate

the

input

level

control

and

set

it

so

that

the

indication

on

the

dynamie

expansion

meter

is

brought

to

its

widest.

For

instance,

when

the

dynamic

expansion

selector

is

set

to

the

‘10’

position,

adjust

so

that

the

display

indiestes

up

to

10

when

a

high

input

signal

is

fod

in

(See

Fig.

3)

4.

Adjust

the

volume

control

on

the

stereo

ampli-

fier

for

suitable

volume,

5.

Operate

the

dynamic

expansion

selector

and

set

it

to

the

position

(4,

7,

10,

13,

18)

where

the

desired

expansion

is

obtained

6,

Adjust

the

volume

and

tone

controls

on

the

stereo

amplifier

for

desired

volume

and

tone,

Fig.

3

USING

A

TAPE

DECK

By

setting

the

tape

monitor

switch

on

the

stereo

amplifier

to

ON,

and

the

processor

switeh

on

the

RG-2

to

OFF,

the

tape

monitor

switch

on

the

RG-

2

ean

be

operated

in

place

of

that

on

the

stereo

amplifier.

The

signal

at

the

RG-2

TAPE

REC

jacks

bypasses

the

processor.

‘When

Employing

the

Processor

for

Tape

Playback

1.

Depress

the

tape

monitor

switch

(ON).

2,

Depress

the

processor

switch

(ON),

3.

Other

operations

are

the

same

as

deseribed

in

“OPERATION”.

FOR

MAXIMUM

ENJOYMENT

RG-2

EFFECT

ON

MUSIC

SOURCE

‘The

RG-2

increases

the

level

variations

in

the

music

source,

High

level

and

percussive

material

such

2s

jazz

and

rock

are

best

played

at

the

dynamic

ex~

pansion

selector

settings

of

10, 18,

16dB, while

delicate

music

such

as

instrumental

soles

and

chamber

music

can

be

given

an

unnatural

effect

if

too

much

expansion

is

used,

so

the

4

to

L0dB

sot-

tings

are

recommended

for

this

type

of

program

Other

factors

such

as

room

acoustics

also

affect

the

choice

of

setting,

but

wits

the

range

of

sottings

provided

almost

all

recorded

material

will

benefit

from

the

unique

processing

available

in

this

unit,

Changes

in

the

ambience

‘The

RG-2

serves

to

expand

the

dynamic

range

of

the

music

source.

Whenever

there

is

a

difference

be-

tween

the

levels

of

the

left-and

right:

channet

input

signals,

this

difference

is

expanded.

Say,

for

instance,

the

difference

between

the

left

and

right

levels

is

24B,

This

is

expanded

to

4¢B

or

BAB.

This

in

turn

translates

into

a

change

in

the

ambience

of

the

sound

as

heard

by

the

listener.

With

a

music

source

arranged

like

that

in

Fig.

3,

an

intoresting

effect

is

obtained

whozeby

the

position

of

the

vocalist

at

the

center

moves

to

the

left

and

right

along

with

the

fluctuations

in

the

difference

between

the

left:

channel

(bass)

snd

right

channel

(piano)

sf

METER

INTERPRETATION

The

meter

indicates

the

instantaneous

maximum

dynamie

expansion

amount

in

dB.

Maximum

moter

deflections

are

4,

7,

10,

13,

16dB

according

to

the

dynamic

expansion

selector

setting.

Partial

mixing

of

L

and

R

channel

signals

causes

both

meters

to

deflect

even

with

only

one

channel

input.

How-

ever,

the

separation

does

not

change

with

stereo

reproduction.

RG-2

TECHNICAL

OUTLINE

‘The

basic

funetion

of

the

RG-2

is

to

expand

the

level

variations

of

the

input

signal

(see

Fig.

5:

in-

pul-output

transfer

characteristics),

Due

to

the

ex-

pander

circuit

composition,

the

input

and

output

clreults

are

not

necessarily

linear.

‘The

block

diagram

is

shown

below.

The

circuit,

consists

mainly

of

a

flat

frequency

response

gain

control

amplifier

(GCA)

and

sensor

section

which

produces

the

signal

to

control

the

gain

of

the

gain

control

amplifier,

After

passing

through

the

input

level

control

and

buffer

amplifier,

a

portion

of

the

input

signal

goes

to

the

sensor

section.

At

the

sensor

section,

the

signal

first

passes

through

an

energy

distribution

filter,

which

possesses

a

slope

of

~6dB/octave

above

and

below

a

2,

5kHz,

center

frequency.

This

effectively

reduces

noise

components,

such

as

motor

rumble,

bum

and

tape

hiss,

yielding

only

the

center

frequeney

com-

ponent,

At

the

RG

detector,

a

peak

detector

(ripple

cancelling

type)

produces

a

DC

output

pro-

portional

to

the

peak

values

of

the

AC

input

signal.

The

output

from

this

RG

detector

becomes

the

gain

control

signal

for

the

GCA.

Current

from

the

sensor

section

determines

the

opentoop

gain

of

the

gain

control

amplifier,

The

gain

therefore

increases

as

the

control

current

in-

creases

in

accordance

with

the

input

signal.

‘The

characteristics

of

this

signal

undergo

changes

sue

as

those

in

Fig.

6:

input-gain

characterissics.

To

provide

this

characterisiivs,

an

NFB

(negative

back)

circuit

returns

a

portion

of

the

GCA

output

to

the

input,

and

the

dynamic

expansion

selector

selects

the

NFB

elements

to

control

the

feedback

ratio,

thereby

determining

the

total

gain

(Fig.

6).

jjmme-

>

Econo

vee

oe

nw

al

PIONEER

Loft

and

right

channels

are

mixed

by

a

blending

re-

sistor

at

the

sensor

seetion

input,

to

provent

e:

cessive

gain

difference

between

the

channels

from

producing

an

unnatural

effect

during

stereo

play-

back.

sao

prey

—

|

q

:

i

i

Fig.

5:

RG

processor

input-output

transfer

characteristics

Ell

Fig.

6:

RG

processor

input-gein

characteristics

SE

FIN

FEY

MOUNTING

THE

RACK

MOUNTING

ADAPTORS

(Applicable

5/G

model

only)

If

you

mount

the

accessory

rack

mount

adaptor

onto

the

RG-2,

you

will

be

able

to

install

the

RG-2

into

a

rack

designed

to

meet

EIA

standards

(ikke

the

Pioneer

JA-R2S)

with

a

2

unit

mounting

piteh.

Mounting

Procedure

1.

Detach

the,rubber

bushes

from

both

sides

of

the

RG-2,

2,Secure

the

rack

mount

adaptors

onto

the

side

pancls

with

the

accessory

mounting

scrows

(MAx10}.

(Fig.

8)

Rack

Mounting

1,

Remove

the

rubber

fect

(4)

from

the

RG.2,

using

a

Phillips

serowdriver

(this

is

not

necessary

if

you

leave

a

gap

between

the

components).

2,

Insort

the

RG-2

and

align

with

the

BLA

standard

mounting

holes

(mounting

pitch:

2U).

8,

Serew

the

RG-2

into

place

using

the

accessory

oval

countersunk

serews

(M5x16),

angular

washers

and

plastic

rings

(four

of

each)

and

a

Phillips

screwdriver.

Nore:

The

reck

mount

adeptors

are

$

mm

thick.

When

aligning

them

with

other

Pioneer

stereo

components

with

2

thick

ness

of

§

mm,

slide

the

accessors

spacers

behind

the

‘adapters

and

then

attach

(Fig,

9)

Flack

mount

asepter.

a

Py

~

eee

ao

=

Mounting

stew

Fig.

8

Aseacer)

Plastic

ino

aG2

Fig.

9

List

of

Parts

for

Rack

Mount

Adaptor

Mounting

screws

(M4x10);

4,

Oval

countersunk

serews

(MBX16);

4,

Angular

washers;

4,

Plastic

rings;

4,

Spacers

(t:

2mm);

4,

PIONEER

ELECTRONIC

CORPORATION

ONEER

ELECTRONICS

AUSTHALIA

PTY.

LIE.

1

«<p0A03§509

4-1,.Meguro

7-Gnome,

tvaguro-ku,

Tokyo.

153.

vepan

Printed

in

Japan

(ARE-3230)