Tasco Telereader FXR-550 - Page 19

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Adjustment

of

gradation

Among

the

meterological

facsimile

information,

only

the

photograph

of

clouds

by

stationary

meterological

satellites

and

test

charts

are

the

signals

with

gradation

and

the

rest

are

black

and

white

signals.

Although

2-tone

signals

can

be

received

in

3-tone

mode,

fine

lines

may

not

be

clearly

displayed.

To

get

a

clear

display

of

fine

lines,

set

the

2-tone

mode

and

adjust

the

threshold

point

so

that

clearest

display

is

obtained.

If

a

printer

is

used

at

the

same

time,

adjust

the

threshold

position

so

that

the

clearest

hard

copy

can

be

obtained.

Inverted

display

may

be

clearer

depending

on

the

picture.

Try

it

with

the

FOG/NEG

button.

Entire

screen

can

also

be

inverted

by

pausing

the

reception

screen.

Note

that

inverting

the

display

screen

causes

the

printed

picture

to

be

inverted

too.

Enlarged

display

and

hard

copy

While

small

letters

and

fine

lines

can

not

be

displayed

because

of

the

total

number

of

dots,

higher

resolution

can

be

obtained

by

partial

enlargement

with

the

index

of

cooperation

(H)

and

drum

speed

appropriately

selected.

*

Set

the

index

of

cooperation

to

the

half,

and

the

picture

is

expanded

by

two

times

horizontally.

*

Set

the

drum

speed

two

times

higher,

and

the

picture

is

expanded

by

two

times.

_l7'-

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