Справочник Пользователя для IBM 19K4543
Appendix A. Product specifications
A-3
Wireless LAN Range
RF frequency band
2.4 GHz (2400 to 2500 MHz)
Number of selectable sub-
channels
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
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
envrionment
1
160 m
(525 ft.)
270 m
(886 ft.)
400 m
(1312 ft.)
550 m
(1805 ft.)
Semi-open
office
environment
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
sensitivity
-83 dBm
-87 dBm
-91 dBm
-94 dBm
Delay spread
(at FER of
<1%)
(at FER of
<1%)
65 ns
225 ns
400 ns
500 ns