User's Guide

Specifications: Dell TrueMobile 1400 WLAN Card User's Guide
Host operating system
Microsoft® Windows® XP, 2000
● NDIS5 miniport driver
Media access protocol
CSMA/CA (collision avoidance) with acknowledgment (ACK)
Data rate
High 11 Mbps
Medium 5.5 Mbps
Standard 2 Mbps
Low 1 Mbps
NOTE—The Dell TrueMobile 1400 internal WLAN card uses an automatic transmit rate select mechanism
Radio characteristics
Table 1. RF (radio frequency) band: 2.4 GHz (2400–2500 MHz)
Modulation technique
Direct sequence spread spectrum
● CCK for high and medium transmit rate
● DQPSK for standard transmit rate
● DBPSK for low transmit rate
Spreading
11-Chip Barker sequence
Bit error rate (BER)
Better than 10–5
Nominal output power
15 dBm
Table 2. Range at various transmission rates
Transmission rate
High speed
(11 Mbps)
Medium speed
(5.5 Mbps)
Standard speed
(2 Mbps)
Low speed
(1 Mbps)
Open office environment range
207 m
(683 ft)
297 m
(980 ft)
400 m
(1300 ft)
550 m
(1750 ft)
Semi-open office environment range
59 m
(194 ft)
74 m
(244 ft)
90 m
(300 ft)
115 m
(375 ft)
Closed office environment range
29 m
(96 ft)
36 m
(119 ft)
40 m
(130 ft)
50 m
(165 ft)
Receiver sensitivity
–85 dBm –88 dBm –91 dBm –94 dBm
Delay spread (at FER of <1%)
›250 ns ›300 ns 400 ns 500 ns
file:///D|/My%20Documents/1400/specs.htm (2 of 3) [11/15/2002 9:09:49 AM]