Compaq dc7800 - Page 43

DVD-R DL, DVD+R DL Up to 6X
DVD+R, DVD-R Up to 8X
DVD-ROM DL, DVD-
ROM
Up to 8X
CD-ROM, CD-R Up to 24X
CD-RW Up to 24X
Access time
(typical reads, including
settling)
Random DVD: < 140 ms (typical), CD: < 125 ms
(typical)
Full Stroke DVD: < 250 ms (seek), CD: < 210 ms (seek)
Stop Time < 4 seconds
Cache Buffer 2 MB (minimum)
Data Transfer Modes ATA PIO mode 4 (16.7 MB/s); ATA Multi-word
DMA mode 2 (16.7 MB/s); ATA UltraDMA
Mode 3 (44.4 MB/s - default)
Power Source Four-pin, DC power receptacle
DC Power Requirement 5 VDC ± 5%-100 mV ripple p-p
12 VDC ± 5%-200 mV ripple p-p
DC Current 5 VDC (< 1000 mA typical, 1600 mA
maximum)
12 VDC (< 600 mA typical, 1400 mA
maximum)
Total Drive Power
(standby mode)
< 2.5 Watt
Audio output Line-Out 0.7 VRMS
Signal-to-Noise Ratio 74 dB
Channel Separation 65 dB
Environmental
conditions (operating –
non-condensing)
Temperature 41° to 122° F (5° to 50° C)
Relative Humidity 10% to 90%
Maximum Wet Bulb
Temperature
86° F (30° C)
PATA CD-RW/DVD-
ROM Combo Slim Drive
Height 12.7mm height slim CD-RW
Orientation Either horizontal or vertical
Interface type PATA/ATAPI
Disc capacity Single layer: Up to 4.7 GB (6 times capacity of CD-ROM)
Dimensions (W x H x D) 5.0 x 0.5 x 5.0 in (128 x 13.6 x 129 mm)
Weight (max) 0.42 lb (190 g)
Write speeds CD-R Up to 24X
CD-RW Up to 24X
Read speeds DVD+R/-R/+RW/
-RW/+R DL /-R DL
Up to 4X
DVD-ROM Up to 8X
CD-ROM, CD-R Up to 24X
CD-RW Up to 24X
Access time
(typical reads, including
settling)
Random DVD DVD: < 140 ms (typical), CD: < 125 ms
(typical)
Random CD DVD: < 250 ms (typical), CD: < 210 ms
(typical)
QuickSpecs
HP Compaq dc7800 Business PC
Technical Specifications - Optical Storage
DA - 12744 Worldwide QuickSpecs — Version 13 — 12.14.2007 Page 43