Harman Kardon HK300XM Owners Manual - Page 8

Dolby*

playback

calibration

In

most

cases,

the

factory

setting

of

the

DOLBY

PLAYBACK

CALIBRATION

set

screws

(36)

on

the

rear

panel

will

provide

best

results.

However,

if

your

listening

room

is

very

hot

or

very

cold,

adjustment

may

be

necessary.

For

calibration,

a

special

Dolby

calibration

tape

(part

#

00935520A

available

from

Harman

Kardon)

is

required.

While

playing

this

tape,

adjust

the

DOLBY

PLAYBACK

CALIBRATION

set

screws

(36)

until

the

PEAK

LEVEL

INDICATORS

(18)

read

0

dB.

Dolby

playback

calibration

is

now

complete.

Output

level

control

A

convenient

OUTPUT

LEVEL

control

(33)

is

incorporated

into

the

300XM

to

match

the

output

level

of

your

tape

deck

with

all

your

other

equip-

ment.

This

prevents

sudden

bursts

of

high

vol-

ume

when

switching

from

one

program

source

to

another.

Headphones

During

recording

you

may

wish

to

monitor

the

program

source

with

headphones.

The

jack

marked

HEADPHONES

(35)

is

included

for

this

purpose.

We

recommend

low

impedance

head-

phones

(less

than

1000

ohms).

Dolby

HX

and

Dolby

NR

The

300XM

incorporates

the

new

DOLBY

HX

headroom

extension

circuitry

as

well

as

Dolby

NR

circuitry.

Together,

they

provide

a

big

improve-

ment

in

signal

-to

-noise

-ratio

and

dynamic

range,

and

we

recommend

the

use

of

both

on

all

recordings.

To

record

with

the

DOLBY

HX

process,

press

the

DOLBY

HX

pushbutton

(24)

before

recording.

(The

DOLBY

HX

pushbutton

(24)

automatically

engages

DOLBY

NR

circuitry).

When

playing

back

a

DOLBY

HX

recorded

tape,

it

is

not

necessary

that

the

DOLBY

HX

push-

button

(24)

be

in

its

"on"

position

(in).

It

is

neces-

sary

to

have

the

DOLBY

NR

pushbutton

(25)

in

its

"on"

position

(in)

for

proper

decoding.

The

DOLBY

HX

system

functions

only

during

the

recording

process.

The

300XM

wi

ll

play

tapes

previously

re-

corded

with

no

loss

of

quality.

Tapes

recorded

with

DOLBY

NR

should

be

labeled

so

you

re-

member

to

engage

the

system

during

playback.

Note:

In

some

cases,

recording

from

FM

Broadcasts

may

contain

more

noise

than

was

apparent

during

the

original

broadcast.

To

pre-

vent

this,

place

the

MPX

FILTER

button

(26)

in

its

"on"

position

whi

le

recording

from

FM

broadcasts.

*Noise

Reduction

System

and

Headroom

Extension

System

manufac-

tured

under

license

from

Dolby

Laboratories

Licensing

Corporation.

"Dolby"

and

the

double

-D

symbol

are

trademarks

of

Dolby

Labora-

tories

Licensing

Corporation.

To

listen

to

cassette

tapes

Set

the

tape

monitor

switch

of

your

preampli-

fier

or

receiver

to

the

monitor

or

tape

position.

Press

the

EJECT

button

(4)

on

your

300XM,

and

the

CASSETTE

DOOR

(6)

will

automatical

ly

open.

Careful

ly

seat

the

cassette

in

the

CASSETTE

COMPARTMENT

(7)

with

the

exposed

portion

of

tape

facing

down

and

the

ful

l

spool

to

your

left.

Once

the

CASSETTE

DOOR

(6)

has

been

closed,

press

the

PLAY

button

(11)

and

the

cas-

sette

will

begin

to

play.

To

rewind

the

cassette

or

return

to

a

previous

passage,

press

the

REWIND

button

(10)

and

al-

low

the

tape

to

rewind

to

the

appropriate

point.

Then

press

the

PLAY

button

(11)

for

playback.

To

skip

passages

or

to

wind

the

cassette

to

its

end,

press

the

FAST

FORWARD

button

(12)

and

allow

the

tape

to

wind

forward

to

the

appro-

priate

point.

To

remove

your

cassette

from

the

cassette

deck,

press

the

STOP

button

(13),

then

the

EJECT

button

(4).

The

CASSETTE

DOOR

(6)

will

auto-

matical

ly

open

and

you

may

remove

the

cassette.

To

record

cassette

tapes

To

record

a

cassette,

set

the

function

switch

of

your

preamplifier

or

receiver

to

the

program

source

you

wish

to

record

from.

Load

a

blank

cassette

as

described

above,

making

sure

the

cassette

is

rewound

to

its

beginning.

To

record,

press

the

PLAY

button

(11)

and

the

RECORD

button

(8)

simultaneously.

The

RECORD

indicator

(9)

wi

ll

light

any

time

the

cassette

deck

is

in

the

record

mode.

To

optimize

your

recordings,

the

LINE

LEVEL

control

(34)

should

be

adjusted

as

high

as

possi-

ble

without

overload

distortion.

By

adjusting

the

LINE

LEVEL

CONTROL

(34)

so

that

the

PEAK

LEVEL

INDICATORS

(18)

read

a

maximum

of

0

dB

(+3

dB

with

metal

tapes)

you'

ll

get

a

close

approximation

of

the

maximum

recording

level.

However

the

HEADROOM

SAFETY

INDICATOR

(19)

provides

a

far

more

accurate

basis

for

adjust-

ment.

The

LINE

LEVEL

CONTROL

(34)

may

be

further

adjusted

to

provide

high

record

levels

as

long

as

the

HEADROOM

SAFETY

INDICATOR

(19)

never

shifts

to

its

red

position,

indicating

tape

saturation.

Occasional

ly,

the

HEADROOM

SAFETY

INDICATOR

(19)

may

shift

into

the

red

even

though

the

PEAK

LEVEL

INDICATORS

(18)

indicate

"safe"

levels.

Regardless

of

the

peak

level

readings,

the

recording

level

must

be

ad-

justed

so

that

the

HEADROOM

SAFETY

INDICA-

TOR

(19)

never

shifts

into

the

red.

6

Harman Kardon HK300XM Owners Manual - Page 8

Corporation.

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