Pioneer QX-747 Brochure

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I REE]LE

rlx-747

BUILT.IN CD-4
Because the discrete

matrix

technique

four-channel discs, employs

one disc

achieve

The

QX-747

DEMODULATOR

for

engraving

groove,

perfect

a special demodulator

four-channel

has this special

four-channel disc

dulator section employs

stability and

"extra"

an

four-channel

QX-747

of the major

one

manipulation of

control

without cost

observed
feature

REGULAR

two

The

decoding

matrix. This means that

SQ

you

a choice of all

reliability,

piece

equipment

of

investment.

is accomplished

virtues of CD-4,

the

separation

the use of

by

with

the

on

the

each

striking

that is new and

MATRIX

other

are also built-in

AND SQ MATRIX

prominent

the

(CD-4),

a

special

four-channel

information onto

signal

is necessary to

performance

demodulator built-in.

an advanced circuit

including PLL

adding

Playing CD-4

with ease. Clear sound

controls and carrier

test record that is included

CD-4

receiver.

four-channel

exclusive

These

with the

four-channel

the

to

QX-747

this new Pioneer receiver

important four-channel

from these discs.

lC

and FETs.

to the

records with the

is achieved by simple

adjustments

level indicator, another

QX-747.

DECODERS

systems

-regular

5-

unlike other

modulation

This

demo-

technology for

lt

is not

your

of

cost

localization,

level

may

be

BUILT.IN

for

matrix

matrix

and

gives

program

sources,

built-in.

the

equally

effects

The SQ

tion is used

clusive

all
gram

AM/FM STEREO

(1)

The

gate

linear four-gang

contribute

(lHF),

100d8

stable
of the

(2)

The

designed

limiter

noise

of

ln

excellent
(g)

So

influence

ceramic
with

tivity

distortion.
(4)

The double-balanced differential demodulator circuit
Pioneer

Separation
30dB

circuit

low-pass

leakage
(5)
The

and has all

The regular

majority of

effective

your

from

posi-

matrix

for ex-

playback

encoded

SQ

sources.

SOPHISTICATED

pro-

important FM front

MOS type

its

FET

immensely to

more than 80dB image rejection, and more than

spurious rejection. FM reception at all times is both

and sensitive, attesting to the

QX-747.

F|VE-STAGE LTMTTER

lC used in

to improve

gives

stage

ratio

of

70dB

the detector

the

QX-747

EXCCLLENT

that

a

linearity

inferior

sound

filters in the FM

two elements, are employed to improve the unit's selec-

characteristics

HIGH.PERFORMANCE

in the

QX-747

is wide, more than 40dB

within

50

is not influenced by SCA beat interruption.

filter employed

minimum.

to a

EFFECTIVE FM MUTING SWITCH

is

QX-747

equipped

the important four-channel

position

matrix

four-channel

discs

be used to reproduce

can

now available,

in achieving excellent

conventional

of

TUNER

FM

(fietO

variable

the

capacitor. These solid state devices

QX-747's

the lF

a capture

and

AM suppression

two-channel

SECTION

FRONT END

end of

the

QX-747

Effect Transistor)

the unit's

high

precision

THE

rN

FM rF

FM lF section

performance

ratio of

1dB

SECTTON

of 55d8. The

circuit is most important

quadrature

and low-distortion

PHASE

phase

quality,

more

remarkably

to

10,000H2. Additionally, this

detector

LINEARITY

circuit

characteristics.

AND

characteristics

Pioneer has used

lF section. Two

than 60dB

MPX IC

improves MPX

in

this section suppresses carrier

with an

ceramic

(lHF)

1KHz, and more

at

FM muting

four-channel sound

discs or

contains
and a

sensitivity of

manufacture.-.,

is

characteristics.

(lHF),

for sound

is employed

HIGH SELECTIVITY

will

not

"phase-linear"

filters, each

while suppressing

performance.

type

switch

circuitry

and

tapes.

a dual-

frequency

1.9,tV

exclusive,

The

signal-to-

linearity

quality.

for

adversely

used

by

than

of MPX

The

sharp

withou--.,

is