Harman Kardon CITATION 15 Owners Manual - Page 11

operates

at

96.3

mHz,

After

locating

this

station

through

the

use

of

the

frequency

scale

(between

96

and

98

mMz)

the

pointer

may

fall

on

42

on

the

logging

scale.

Make

a

note

of

this

setting.

For

future

tuning

to

WQXR

simply

set

the

pointer

to

42

on

the

logging

scale.

TUNING

METER

All

FM

broadcast

stations

are

assigned

a

frequency

by

the

Federal

Communications

Commission.

The

signals

from

these

stations

extend

equally

above

(+)

and

below

(—)

the

assigned

frequency.

The

fre-

quency

spectrum

is

called

the

"pass

band".

The

tuning

meter

of

the

Citation

Fifteen

(when

centered)

is

tuned

to

the

exact

center

of

the

pass

band.

However,

you

may

be

de

tuned

slightly

(either

+

or

H

and

still

not

experience

degradation

of

the

quality

of

sound

by

remaining

within

the

limits

of

the

pass

band.

Only

when

detuned

enough

to

reach

the

edge

of

the

pass

band

will

the

signal

become

noisy,

distorted

and

finally

disappear.

It

is

important

to

note

that

it

is

NOT

ALWAYS

NECESSARY

to

be

tuned

to

the

EXACT

center

of

an

assigned

pass

band

to

obtain

clean,

undistorted

sound.

QUIETING

METER

"Quieting"

is

a

term

used

in

the

measurement

of

the

relative

signal-

to-noise

ratio

of

a

broadcast

signal.

Conventional

signal

strength

or

center

channel

meters

do

not

in-

dicate

the

quality

of

the

received

signal

—

simply

their

strength

and

pass

band

accuracy.

Harman/Kardon's

extraordinary

QUIETING

METER

actually

indicates

or

"reads"

the

signal-to-noise

ratio

or

the

QUALITY

of

the

received

signal.

Maximum

deflection

of

this

meter

(highest

number)

represents

the

best

listening

point

within

the

pass

band

EVEN

IF

THE

TUNING

METER

IS

NOT

AT

THE

CENTER

OF

THE

PASS

BAND.

As

you

detune

closer

to

the

edge

of

a

station's

pass

band,

the

QUIETING

METER

will

immediately

reflect

the

increased

noise

and

distortion,

The

QUIETING

METER

will

"ALWAYS"

agree

with

what

you

hear

and

will

"ALWAYS"

indicate

the

best

tuning

point.

The

preceding

paragraphs

provide

a

basic

and

concise

description

of

the

function

and

operation

of

the

controls

and

indicators

of

the

Citation

Fifteen.

They

have

been

described

under

what

are

considered

"normal"

operating

conditions.

However,

abnormal

conditions

sometimes

do

occur

and

could

pose

some

special

problems.

The

following

material

deals

with

some

key

problems

which

could

arise

under

"abnormal"

conditions

and

the

methods

which

can

be

employed

to

solve

them.

10

4

UIETING

ANTENNA

ORIENTATION

If

your

antenna

system

uses

a

rotation

device,

the

best

antenna

orientation

will

be

achieved

when

the

QUIETING

METER

indicates

the

greatest

steady

deflection

(highest

number).

Rotate

the

antenna

in

the

general

direction

of

the

transmitting

station's

antenna

and

consult

the

QUIETING

METER

to

make

fine

adjustments

of

the

antenna's

position.

MULTIPATH

"Multipath"

is

a

form

of

audible

distortion

caused

when

a

signal

and

its

echoes

reach

a

receiver

a

fraction

of

a

second

apart.

(Similar

to

"ghosts"

on

your

TV

screen).

Such

distortion

can

be

caused

by

high

rise

buildings,

airplanes,

water

towers,

mountains,

etc.

Con-

ventional

signal

strength

tuning

meters

are

unable

to

provide

guidance

to

reduce

such

interference.

I-Towever,

since

multipath

signals

always

increase

background

noise,

the

QUIETING

METER

may

be

used

to

tune

both

the

Citation

Fifteen

and

your

antenna

to

eliminate

or

drastically

reduce

multipath

inter-

ference.

10

Harman Kardon CITATION 15 Owners Manual - Page 11

Harman Kardon CITATION 15 Manual

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