Sharp MD-R3 Operations Instructions download pdf (Page 41)

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■ Types of discs

There are two types of discs: playback-only and recordable

type.

● Playback-only MiniDisc:

This type of MiniDisc is used for commercially available

pre-recorded music. This is the same kind of optical disc

as CDs. Playback is performed using an optical pickup.

(Recording and editing are not possible.)

A shutter will be used

on only one side (back).

● Recordable MiniDisc:

This is a “raw disc” on which recording can be performed.

A magneto optical disc is used.

Recordings are made using a laser and magnetic field.

Repeated recording is possible.

Shutters will be used on

both sides.

■ High-speed access

A unique feature of the MiniDisc is the ability to locate the

beginning of a desired track at high speed.

This is because the track number and track name data is

stored in a TOC (Table of Contents).

■ Shock Resistant Memory

During playback, approximately 10 seconds of information

is stored in the semiconductor memory. Therefore, even

when the pickup cannot read information for a second or

two due to an external shock, the sound continues without

interruption because the information stored in memory is

output.

MINIDISC SYSTEM LIMITATIONS

"TOC FULL" may be displayed even if the maximum recording

time on a MiniDisc has not been reached.

In the MD system, the recording area on an MD is pro-

grammed in a TOC (Table of Contents). If tracks are recorded,

edited and partial erased repeatedly, the TOC will fill up with

information about the tracks, even though the track limit (255

tracks) has not been reached. If that happens, further record-

ing will be impossible. (If you use the all erase function, the

MD can be reused as a blank MD.)

Even if the maximum MiniDisc recording time has not been

reached, "DISC FULL" may be displayed.

If there is a flaw on the MiniDisc surface, that area is auto-

matically excluded from the space available for recording.

Therefore, the available recording time will be reduced.

Even if several short tracks are erased, the remaining record-

ing time may not show an increase.

When the remaining recording time of a disc is displayed,

short tracks less than 8 seconds long may not be included in

the total.

Two tracks may not be combined in editing. For MiniDiscs which repeated recording and editing operations

were performed, the COMBINE function may not work.

Tracks recorded from a CD (digital recordings) and tracks re-

corded from some other equipment (analog recordings) cannot

be combined.

The total of the recorded time and time remaining on a disc

may not add up to the maximum possible recording time.

A cluster (about 2 seconds) is normally the minimum unit of

recording. So, even if a track is less than 2 seconds long, it

will use about 2 seconds of space on the disc. Therefore, the

time actually available for recording may be less than the re-

maining time displayed.

If there are scratches on discs, those sections will be auto-

matically avoided (no recording will be placed in those sec-

tions). Therefore, the recording time will be reduced.

Disc

TOC

Sound data

An MD which has been recorded or edited repeatedly may

skip during fast reverse or fast forward.

If you fast reverse or fast forward over recorded tracks,

the sound may skip.

MD-R3

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Sharp MD-R3 Operations Instructions Page 41

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