HP QUICKSPECS DC7900 - Manual (Page 28)

Operating voltage 3.3V +/- 9%
12V +/- 8%
Power consumption Platform/WLAN Mode Power Consumption
Maximum Power
Consumption 10 Watts
Transmit Only 4 Watts maximum averaged power over 1
second
Transmit Packet or
Active Scanning 1000 mA peak current for 100 microseconds
or longer
Receive Only Mode or
Idle without IEEE PSP
mode enabled 3 Watts maximum averaged over 1 second
Idle, with IEEE PSP
mode enabled 1.0 Watts maximum averaged over 1 second
Transmit Disabled
(turned off in software) 50 mW maximum, averaged over 1 second
Platform in S3 or S4
(power removed from
Low Profile PCI Express
Card) 5 mW maximum, averaged over 1 second
Output power
(approximately) 802.11b modes 802.11g modes EWC modes
+19 dBm +/- 1.0 dB
maximum +17 dBm +/- 1.0 dB
maximum +17 dBm +/- 1.0 dB
maximum (total power
in all transmit chains)
Receive sensitivity Mode Data rate Sensitivity
802.11b 1 Mbps -94 dBm
802.11b 11 Mbps -85 dBm
802.11g 6 Mbps -91 dBm
802.11g 18 Mbps -85 dBm
802.11g 48 Mbps -75 dBm
802.11g 54 Mbps -72 dBm
EWC (2.4 GHz) 6.5 Mbps -87 dBm
EWC (2.4 GHz) 54 Mbps -82 dBm
EWC (2.4 GHz) 81 Mbps -78 dBm
EWC (2.4 GHz) 162 Mbps -74 dBm
EWC (2.4 GHz) 270 Mbps -68 dBm
EWC (2.4 GHz) 300 Mbps -64 dBm
Data transfer rate Data Rate (MCS) Minimum Throughput
1 Mbps (802.11 b) 700 kbps
2 Mbps (802.11 b) 1.4 Mbps
5.5 Mbps (802.11 b) 3.5 Mbps
11 Mbps (802.11 b) 5.9 Mbps
12 Mbps (802.11 g) 6 Mbps
18 Mbps (802.11 g) 9 Mbps
24 Mbps (802.11 g) 12 Mbps
36 Mbps (802.11 g) 18 Mbps
48 Mbps (802.11 g) 21 Mbps
54 Mbps (802.11 g) 22.5 Mbps
6.5 Mbps (20 MHz EWC) 4.5 Mbps
13 Mbps (20 MHz EWC) 9 Mbps
QuickSpecs
HP Compaq dc7900 Business PC
Technical Specifications - Communications
DA - 13029 Worldwide QuickSpecs — Version 24 — 10/30/2009 Page 28