Enterasys Networks 802.11 - Manual (Page 175)

A-1
Appendix A
PC Card Information
Consult your authorized RoamAbout reseller sales office for information about the radio
regulations that apply in your country.
Table A-1: Radio Characteristics
Signal strength can be affected by closeness to metal surfaces and solid high-density
materials. The ranges listed above provide a general guideline and may vary according to
the actual physical environment where the product is used.
•
In open environments, there are no physical obstructions between antennas.
•
In semi-open environments, work space is divided by shoulder-height, hollow wall
elements; antennas are at desktop level.
R-F frequency band 2.4 GHz (2400-2483.5 MHz)
Number of selectable
sub-channels North America (FCC) 11
Europe (ETSI) 13
France (FR) 4
Japan (JP) 13 (low power cards)
14 (high power cards)
Other countries that adhere to
FCC
ETSI
11
13
Modulation technique Direct sequence spread spectrum (DQPSK, CCK, DBPSK)
Spreading 11-chip barker sequence
Bit error rate
Better than 10
-5
Nominal Output Power 15 dBm
Range (100 bytes user
data) 11 Mbit/s 5.5 Mbit/s 2 Mbit/s 1 Mbit/s
Open environment 160 m
(525 feet) 270 m
(885 feet) 400 m
(1300 feet) 550 m
(1750 feet)
Semi-open environment 50 m
(165 feet) 70 m
(230 feet) 90 m
(300 feet) 115 m
(375 feet)
Receiver sensitivity -82 dBm -87 dBm -91 dBm -94 dBm