Harman Kardon RHK670 Owners Manual - Page 8

This

switch

has

no

effect

on

the

FM

tuner

section,

and

the

STEREO

LED

(27)

may

stay

on

when

the

switch

is

depressed.

The

hk670

provides

three

additional

controls:

the

TONE

DEFEAT

switch,

the

SUB-

SONIC

fi

lter

switch,

and

the

HIGH

CUT

fi

lter

switch.

Depressing

the

TONE

DEFEAT

switch

(28)

eliminates

the

action

of

the

BASS

and

TREBLE

controls

to

allow

for

critical

evalua-

tion

of

their

effect.

Depressing

the

SUB-

SONIC

switch

(29)

engages

a

fi

lter

to

protect

your

speakers

from

inaudible

low

-frequency

signals

caused

by

severe

record

warp,

acoustic

feedback,

or

tonearm

resonance

effects.

Depressing

the

HIGH

CUT

switch

(30)

engages

a

second

fi

lter

to

reduce

the

extreme

high

frequency

content

of

program

material

and

reduce

the

audible

defects

of

noisy

broadcasts,

tapes,

and

records.

FM

Tuning

Turn

the

FUNCTION

control

(20)

of

the

hk670

to

STEREO

FM.

Rotate

the

tuning

knob

(31)

to

tune

in

a

station

on

the

FM

dial

scale

(32),

cal

ibrated

from

88

to

108

megahertz.

The

red

LED

(27)

labeled

STEREO

wi

l

l

glow

when

you

are

receiving

a

broadcast

in

stereo.

Harman

Kardon's

patented

SMQ

meter

(33)

reads

signal

strength,

multipath,

and

quieting

to

indicate

the

qual

ity

of

the

incom-

ing

FM

signal

,

not

just

its

quantity.

The

further

the

SMQ

meter

deflects

to

the

right,

the

stronger

the

signal

will

be

in

relation

to

back-

ground

noise.

Once

the

station

has

been

tuned

in,

smal

l

deflections

of

the

SMQ

meter

indicate

the

presence

of

multipath

interfer-

ence

(similar

to

TV

"ghosts").

You

can

usually

el

iminate

multipath

by

adjusting

the

position

of

your

antenna.

A

green

in

-tune

LED

(34)

above

the

dial

pointer

wi

l

l

glow

when

you

are

tuned

to

the

center

of

the

broadcast

channel

.

The

il

lumi-

nation

of

the

in

-tune

LED

will

usual

ly

coincide

with

the

best

reading

of

the

SMQ

meter.

When

the

two

indications

do

not

coincide,

tune

according

to

the

meter.

Occasionally,

an

FM

stereo

multiplex

cir-

cuit

will

introduce

a

high

-frequency

noise

or

hiss

when

processing

a

weak

FM

stereo

broadcast.

Setting

the

FUNCTION

control

(20)

to

FM

wi

ll

disengage

the

multiplex

circuit

and

reduce

the

noise.

The

broadcast

will

be

received

monophonically

and

the

red

STEREO

LED

(27)

wil

l

be

off.

The

hk670

incorporates

an

FM

muting

circuit

to

eliminate

the

hissing

atmospheric

noise

you

normal

ly

hear

when

tuning

between

FM

stations.

To

engage

this

circuit,

depress

the

FM

MUTING

switch

(35).

You

can

adjust

the

action

of

the

muting

circuit

in

the

hk670

by

using

the

MUTE

ADJ

control

(36)

on

the

rear

panel.

The

MUTE

ADJ

control

is

set

at

the

factory

so

that

you

can

receive

the

maximum

number

of

sta-

tions.

You

may

wish

to

alter

the

setting

to

mute

some

of

the

weaker

(and

noisier)

FM

stations

by

turning

the

MUTE

ADJ

control

clockwise

(as

viewed

from

the

rear

of

the

receiver).

When

the

MUTE

ADJ

control

is

turned

fully

clockwise,

al

l

but

the

strongest

FM

stations

are muted.

If

you

use

the

hk670

to

receive

Dolby

FM

broadcasts

and

you

have

an

external

Dolby

decoder,

depress

the

25

MICRO-

SECONDS

switch

(37)

for

proper

de

-empha-

sis.

If

you

do

not

have

a

Dolby

decoder,

the

best

reception

of

Dolby

FM

broadcasts

can

be

obtained

with

the

25

MICROSECONDS

switch

in

the

normal,

extended

position.

AM

Tuning

Set

the

FUNCTION

control

(20)

to

AM

and

tune

according

to

the

AM

dial

scale

(38),

calibrated

from

540

to

1600

kilohertz.

In

the

AM

mode,

the

SMQ

meter

(33)

acts

as

a

sig-

nal

strength

meter

to

indicate

the

best

reception.

Auxiliary

Source

You

can

listen

to

the

auxiliary

source

that

you

have

connected

by

setting

the

FUNCTION

control

(20)

to

AUX.

To

Play

Back

Tapes

The

TAPE

MONITOR

switch

(39)

admits

pro-

grams

from

any

line

-level

source

(usual

ly

a

tape

deck)

connected

to

the

TAPE

IN

jacks.

When

you

wish

to

play

back

a

tape,

set

the

Harman Kardon RHK670 Owners Manual - Page 8

Harman Kardon RHK670 Manual

Page 8 highlights