Fostex CR200 Service Manual page 4

CR200
1. CD-R THEORY
1-1. Physical layout compared to CD
The conventional CD and CD-R discs basically have the same
physical layout. However, as you can see from the Fig. 1,
comparing to the conventional CD, the CD-R disc also has so-
called "minus" areas such as PCA (Power Calibration Area) and
PMA (Program Memory Area) where the temporary information
is recorded.
• Unrecorded, blank disc
The information area is located next to the clamping area and the
center hole. This area contains a pregroove with CLV (Constant
Linear Velocity) clocking information and a time code.
• Partially recorded disc
The CD-R system gives the opportunity to record a disc in several
actions at a different time on a different recorder. After the first
recording, the information area is divided into five parts as shown
below and in the right.
1: Power Calibration Area (PCA)
2: Program Memory Area (PMA)
3: Lead-in Area
4: Program Area
5: Lead-out Area
• Finalized disc
After finalizing the disc, the CD-R disc will become compatible
with the RED Book (for regular CD) definitions and specifications.
Therefore, it can be played back on conventional CD players. The
Information Area of a finalized disc consists of three parts:
1: Lead-In Area
2: Program Area
3: Lead-Out Area
4
120
max 118
44.7
min 33
min 26
15
Clamping
Center
Pregroove area with address (ATIP)
area
hole
Layout of unrecorded CD-R disc
max 118
max 116
50
46
44.7
PCA
PMA
temporary
Table Of Contents (TOC)
Layout of partially recorded CD-R disc
max 118
max 116
50
46
Lead-in Area
final Table of Contents (TOC)
Layout of recorded CD-R disc
max 118
max 116
50
46
Layout of conventional CD disc
Fig. 1 Cross Section of CD-R & CD Disc
Information area
recorded
part
MUSIC
Program
Recordable
Area
User Area
+ Lead-out Area
Lead-in Area
recorded part
MUSIC
Program Area Lead-out
Area
recorded part
MUSIC
TOC
Lead-out
Area