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IBM_AP500.book Page 2 Monday, November 13, 2000 3:42 PM
Radio Characteristics
R-F Frequency Band
Selectable sub-channels
Modulation Technique
Spreading
Bit Error Rate (BER)
Nominal Output Power
Encryption
Range / Transmit Rate
Open Office
Environment
Semi-Open Office
Environment
Closed Office
Receiver Sensitivity
Delay Spread (FER <1%)
Note:
The range values listed under "Radio Characteristics" are typical distances as
measured at the IBM High Rate Wireless LAN laboratories. These values may
provide a rule of thumb and may vary according to the actual radio conditions at
the location where the High Rate Wireless LAN product will be installed.
•
The range of your wireless devices can be affected when the antennas are
placed near metal surfaces and solid high-density materials.
•
Range is also impacted due to "obstacles" in the signal path of the radio that
may either absorb or reflect the radio signal.
The numbers listed on page A-2 lists the typical ranges when used indoors in
"office environments" that can be described as follows:
A-2
IBM High Rate Wireless LAN Access Point 500 Quick Start Guide
2.4 GHz (2400-2500 MHz)
1
2412 MHz
2
2417 MHz
3
2422 MHz
4
2427 MHz
5
2432 MHz
6
2437 MHz
7
2442 MHz
8
2447 MHz
9
2452 MHz
10
2457 MHz (default)
11
2462 MHz
Direct Sequence Spread Spectrum
CCK at 11 Mb/s & 5.5 MB/s, DQPSK at 2 Mb/s, DBPSK at 1
Mb/s
11-chip Barker Sequence
-5
Better than 10
15 dBm
128 - Bit Wired Equivalent Privacy (WEP)
11 Mb/s
5.5 Mb/s
160 m
270 m
(525 ft.)
(885 ft.)
50 m
70 m
(165 ft.)
(230 ft.)
25 m
35 m
(80 ft.)
(115 ft.)
-83 dBm
-87 dBm
65 ns
225 ns
2 Mb/s
1 Mb/s
400 m
550 m
(1300 ft.)
(1750 ft.)
90 m
115 m
(300 ft.)
(375 ft.)
40 m
50 m
(130 ft.)
(165 ft.)
-91 dBm
-94 dBm
400 ns
500 ns
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