User's Manual

Quick Installation Guide A-3
DRAFT - Agere #3: 05/14/2002
Compaq CONFIDENTIAL—For Internal Use Only
14 May 2002
File: CMPQ_MM_A.fm
The range of the wireless signal is related to the Transmit Rate of
the wireless communication. Communications at lower Transmit
Rates will travel larger distances.
■ 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 listed range values listed are typical distances as measured at
the Compaq laboratories. These values may provide a rule of
thumb for indoor installations, and may vary according to the
actual radio conditions at the location where the product will be
installed.
■ In Open Office environments, antennas can “see” each other,
i.e. there are no physical obstructions between them.
■ In Semi-open Office environments, work space is divided by
shoulder-height, hollow wall elements; antennas are at
desktop level.
■ In Closed Office environments, work space is separated by
floor-to-ceiling brick walls.
Modulation Technique Direct Sequence Spread Spectrum
CCK CCK DQPSK DBPSK
Range/Transmit Rate 11 Mb/s 5.5 Mb/s 2 Mb/s 1 Mb/s
Open Office 160 m
(525 ft.)
270 m
(885 ft.)
400 m
(1300 ft.)
550 m
(1750 ft.)
Semi-Open Office 50 m
(165 ft.)
70 m
(230 ft.)
90 m
(300 ft.)
115 m
(375 ft.)
Closed Office 25 m
(80 ft.)
35 m
(115 ft.)
40 m
(130 ft.)
50 m
(165 ft.)
Receiver Sensitivity -82 dBm -87 dBm -91 dBm -94 dBm
Delay Spread
(FER of <1%)
65 ns 225 ns 400 ns 500 ns