User Manual

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COMPANY CONFIDENTIAL

6 R0.2

3. Product Requirements

3.1 Hardware Requirements

Interface

USB

Network Standard

IEEE802.11b/g

Modulation

802.11b---- CCK (11Mbps, 5.5Mbps), QPSK (2Mbps), BPSK

802.11g----OFDM

Technique

Direct Sequence Spread Spectrum

Operating Frequency 2.412 ~ 2.462 GHz: North America

2.412 ~ 2.472 GHz: Europe ETSI and

2.412 ~ 2.472 GHz: Japan (ARIB STD-33)

Operating Channels

1~11 for N. America,

1~13 for Europe (ETSI)

and 1~14 for Japan,

RF Output Power

11g: 14dBm+-1dBm

11b: 16dBm+-1dBm

Antenna

Antenna design for diversity, and one PCB antenna with external

system antenna

Receiver Sensitivity

11b: -90 dBm @ 11M

11g: -72dBm @ 54M

Power Consumption

11g 11b

Packet TX

@12 dBm

<480mA

maximum

Packet TX

@14 dBm <460mA

Con. TX

@12 dBm Above 480mA

Con. TX

@14 dBm Above 460mA

<300mA

(Rxin -20dB

and –70dBm) RX

<270mA

(Rxin -20dB

and –70dBm)

Supply Voltage

3.3V

3.2 Hardware Architecture

The circuit design of the IEEE802.11b/g USB module is based on Atheros chipset,

including AR2524 (Digital Base-band Processor) & AL2230 (Receive/Transmit Devices).

The chip set block diagram is shown in Figure 1.