Compaq dc7800 - Page 44

Cache Buffer 2 MB (minimum)
Data Transfer Modes ATA PIO mode 4); ATA Multi-word DMA
mode 2; ATA UltraDMA mode 0; ATA
UltraDMA mode 1, mode 2; ATA UltraDMA
Mode 3 (default)
Power Source Four-pin, DC power receptacle
DC Power Requirement 5 VDC ± 5%-100 mV ripple p-p
DC Current 5 VDC (< 1000 mA typical, < 1600 mA
maximum)
Total Drive Power
(standby mode)
< 2.5 Watt
Audio output level 0.7 Vrms (typical)
Environmental (all
conditions non-
condensing)
Temperature 41° to 122° F (5° to 50° C)
Relative Humidity 5% to 85%
Maximum Wet Bulb
Temperature (operating)
86° F (30° C)
PATA DVD-ROM Slim
Drive
Height 12.7mm
Orientation Either horizontal or vertical
Interface type PATA/ATAPI
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)
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 (seek), CD: < 210 ms (seek)
Data Transfer Modes ATA PIO mode 4 (16.7 MB/s); ATA Multi-word
DMA mode 2 (16.7 MB/s)
Power Source Four-pin, DC power receptacle
DC Power Requirement 5 VDC ± 5%-100 mV ripple p-p
DC Current 5 VDC - <1000 mA typical, < 1600 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
(all conditions non-
condensing)
Temperature 41° to 122° F (5° to 50° C)
Relative Humidity 5% to 85%
Maximum Wet Bulb
Temperature (operating)
86° F (30° C)
QuickSpecs
HP Compaq dc7800 Business PC
Technical Specifications - Optical Storage
DA - 12744 Worldwide QuickSpecs — Version 13 — 12.14.2007 Page 44