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AppleCD SC Plus- Technical
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1991-08-02
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AppleCD SC® Plus Disk Drive-Technical Specifications
Copyright 1991, Apple Computer, Inc.
The playback medium for the AppleCD SC CD-ROM unit is a 12-centimeter optical
disc installed in a CD caddy. Any CD-ROM or audio compact disc is compatible.
The data capacity in mode #1 is 656 megabytes; 748 megabytes in mode #2. The
unit access from 1 recording surface. The unit has a capacity of more than
270,000 blocks per disc. Data per block is 2,048 bytes in mode #1; 2,336 bytes
in mode #2.
Audio playback time is more than 1 hour with a frequency response of 20 to
20,000 hertz.
Characteristics include:
•An average of 380 ms is the typical access time (including latency). The
maximum first to last block access time is typically 650 ms.
•The data streaming rate is 150K/second in mode #1; 171K/second in mode #2.
•The block rate is 75 blocks/second.
•SCSI bus transfer burst rate is 1.5 MB/second.
•Rotational speed is approximately 230 to 530 rpm (variable)
•Startup time is 5 typically seconds, but media-dependent.
•Spin-down time is typically 2 seconds.
Electrical requirements:
•100 to 240 volts AC for line voltage
•Frequency is 50 to 60 hertz with maximum power of 40 watts
Environmental requirements:
•Operating temperature: 50 - 104 degrees Farenheit (10-40 degrees Centigrade)
•Storage temperature: -22 - 122 degrees Farenheit (-30 - 50 degrees Centigrade)
Size and Weight:
Height: 3.31 in. (8.4 cm)
Width: 9.69 in. (24.6 cm)
Depth: 10.47 in. (26.6 cm)
Weight: 8.8 lb (8 kg)
_______________________________________________________________________________
Apple Products
New Apple Products
AppleCD SC Plus Disk Drive
17-Jun-91