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USA frequency range for 2.4 GHz - ISM
2.0 - 2.4835
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UNII-1 range
5.15-5.25 GHz
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UNII-2 range
5.25-5.35 GHz
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UNII-2 extended range
5.47-5.7253 GHz
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CB Radio
26.965-27.405 MHz (HF)
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FM Radio
88.1 - 108.1 MHz (VHF)
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802.11b/g Freq. range
2.4000 - 2.3835 GHz (UHF)
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802.11a Freq. range
5.47 - 5.725 GHz (SHF)
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1 Mb Data Rate encoding method
11 chip Barker coding
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2 Mb Data Rate encoding method
11 chip Barker coding
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5.5 Mb Data Rate encoding method
8 chip encoding - 8 bits CCK coding
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11 Mb Data Rate encoding method
8 chip encoding - 4 bits CCK coding
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1 Mb Data Rate modulation method
DSSS BPSK
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2 Mb Data Rate modulation method
DSSS QPSK
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5.5 Mb Data Rate modulation method
DSSS QPSK
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11 Mb Data Rate modulation method
DSSS QPSK
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FCC antenna TX power maximum P2P
30 dBm
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FCC antenna maximum gain P2P
6 dBm
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FCC antenna EIRP maximum P2P
36 dBm
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CISCO antenna TX power maximum P2P
20 dBm
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CISCO antenna maximum gain P2P
36 dBm
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CISCO antenna EIRP maximum P2P
56 dBm
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FCC antenna TX power maximum P2MP
30 dBm
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FCC antenna maximum gain P2MP
6 dBm
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FCC antenna EIRP maximum P2MP
36 dBm
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CISCO antenna TX power maximum P2MP
20 dBm
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CISCO antenna maximum gain P2MP
36 dBm
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CISCO antenna EIRP maximum P2MP
36 dBm
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EUROPE and other TX max
17 dBm
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EUROPE and other max gain
3 dBi
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EUROPE and other EIRP max
20 dBm
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CISCO comp to EUROPE and other TX max
17 dBm
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CISCO comp to EUROPE and other max gain
2.2 dBi
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CISCO comp to EUROPE and other EIRP max
19.2 dBm
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An independent U.S. government agency established by the Communications Act of 1934. It regulates communications
FCC
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A nonprofit organization/professional association for the advancement of technology
IEEE
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Produces globally applicable standards for Information and Communications Technologies (ICT)
ETSI
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The frequency spectrum, measured in Hertz. Bandwidth can refer to data rates or the width of an RF channel
bandwidth
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Used to measure bandwidth. Hertz measures the number of cycles per second. One Hertz is one cycle per second
Hz
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Use of spread spectrum in the commercial market
ISM frequency bands
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ISM
Industry, Scientific, and Medical
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Frequency ranges used in wire- less networks that don�t require licensing.
UNII
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UNII
Unlicensed National Information Infrastructure
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The modulation technique used by 802.11b devices to send data. The transmitted signal is spread across the entire frequency spectrum that is being used
DSSS
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DSSS
Direct Sequence Spread Spectrum
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number of channels in a frequency range. Not considered a spread spectrum technology but is used for modulation in a wireless network
OFDM
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OFDM
Orthogonal Frequency Division Multiplexing
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The volume of the signal
amplitude
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The pitch of the signal
frequency
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The timing of the signal between peaks
phase
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A code used to represent bits
chipping code
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Defines the use of 11 chips when encoding data.
barker code
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Uses a series of codes called complementary sequences
CCK
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CCK
Complementary Code Keying
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A modulation technique used in 802.11 networks.
BPSK
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BPSK
Binary Phase Shift Keying
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A version of frequency modulation in which the phase of the carrier wave is modulated to encode bits of digital information in each phase change
QPSK
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QPSK
Quadrature Phase Shift Keying
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A technology that is used in the new 802.11n specification. devices use multiple antennas to receive signals, usually two or three, as well as multiple antennas to send signals.
MIMO
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MIMO
Multiple-Input Multiple-Output
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The capability of a wireless network to shift to a lower rate as a client moves farther away from the AP
DRS
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DRS
Dynamic Rate Shifting
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When a device wants to send, it must listen first. Similar to CSMA/CD.
CSMA/CA
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CSMA/CA
Carrier Sense Multiple Access/Collision Avoidance
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A message indicating that it is clear to send data on the wireless medium.
CTS
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A request to send on a wireless network.
RTS
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A nonprofit organization that certifies the interoperability of more than 4200 products.
Wi-Fi Alliance
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Used to estimate the service area of a device.
EIRP
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EIRP formula
TXer – cable loss + antenna gain
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