Marantz CD-4 Spezifikationen PDF herunterladen (Seite 10)

the difference signal while

at

the

same

time

reducing noise

and

crosstalk.

When

a CD-4 record

is

played, the Muting/4-CH Radar

circuit

senses

the presence

of

the 30

kHz,

carrier and, by

means

of

its special circuit, turns on the Radar light and

opens the path

for

the difference signals.

If

a

regular stereo record

is

played,

the

same

Muting

circuit shuts

off

the Radar light and the difference

signal path,

so

that

on'ly the

sum

signal (which

contains all the information

necessary

for

stereo

reproduction)

is

allowed

to

reach

the output.

This

same

function

can

be

manually performed

with

an

external pushbutton.

Once the

sum

and difference signals have

been

recovered, the rest

is

simple'

arithmetic. The

Mixing Circuit

adds

and

subtracts these signals

yielding the discrete channels. For example:

(LF

+ Ls) +

(LF

-La)

= 2

LF.The

other three

channels are derived in a similar manner.

Figure

5.

Functional

Block

Diagram

1JO---oRs

1 2 ... 5 6 7 8 9 10 11 12 13 14

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