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
