IBM 19K4543 - Manual (Page 29)

Appendix A. Product specifications A-3
Wireless LAN Range
RF frequency band 2.4 GHz (2400 to 2500 MHz)
Number of selectable sub-
channels North America (FCC): 11
Europe (ETS): 13
France (FR): 4
Japan (JP): 1
Other countries: FCC: 11
ETS: 13
Modulation technique Direct sequence spread spectrum (DSSS)
• CCK for high and medium tranmit
rates
• DQPSK for standard transmit rate
• DBPSK for low transmit rate
Spreading 11-chip Barker Squence
Bit error rate (BER) Better than 10 -5
Nominal outout power 15 dBm
Range (100
bytes user
data) /
transmit rate
High speed
11 MBps
Medium
speed
5.5 MBps
Standard
speed
2 MBps
Low speed
1 MBps
Open office
envrionment
1
160 m
(525 ft.)
270 m
(886 ft.)
400 m
(1312 ft.)
550 m
(1805 ft.)
Semi-open
office
environment
2
50 m
(164 ft.)
70 m
(230 ft.)
90 m
(295 ft.)
115 m
(377 ft.)
Closed office
3
25 m
(82 ft.)
35 m
(115 ft.)
40 m
(131 ft.)
50 m
(165 ft.)
Receiver
sensitivity -83 dBm -87 dBm -91 dBm -94 dBm
Delay spread
(at FER of
<1%) 65 ns 225 ns 400 ns 500 ns