Specifications

RoamAbout Product Specifications A-3
PC Card Radio Characteristics
PC Card Radio Characteristics
Radio characteristics of RoamAbout PC Cards may vary according to the country where
the product was purchased (see Table A-1). If you plan to connect a RoamAbout Access
Point to an outdoor antenna installation, additional regulations may apply. You use a
different RoamAbout PC Card when connecting to the RoamAbout outdoor 14 dBi
directional antenna in countries that adhere to ETSI regulations (see Table A-2).
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) 14
Other countries that adhere to:
1
FCC
ETSI
1
Consult your authorized RoamAbout reseller sales office for information about the radio
regulations that apply in your country.
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