Features - EW-DNXA-92 (HB92)
* PCI Express Half Size Mini-Card
* Atheros AR9280 Merlin HB92
* Site survey function
* Support MicroSoft Windows XP, 2000, Vista, Linux
* Interoperability - Complying with WiFi
* Support WPA
The EW-EW-DNXA is a dual band 802.11a/b/g/n PCI Express Half Size card. The MAC/Baseband/Radio Processor, Atheros AR9280 (Merlin) is a highly integrated single-chip solution for 2.4 and 5 GHz 802.11n ready wireless local area networks (WLANs). It enables high-performance 2x2 MIMO configurations for wireless station applications demanding robust link quality and maximum throughput and range. The AR9280 integrates a multi-protocol MAC, baseband processor, analog-to-digital and digital-to-analog (ADC/DAC) converters, 2x2 MIMO radio transceiver, and PCI Express interface in an all-CMOS device for low power and small form factor applications.
The AR9280 implements half-duplex OFDM, CCK, and DSSS baseband processing, supporting up to 130 Mbps for 20 MHz and 300 Mbps for 40 MHz channel operations respectively, and IEEE 802.11a/b/g data rates. Additional features include signal detection, automatic gain control, frequency offset estimation, symbol timing, and channel estimation. The AR9280 MAC supports the 802.11 wireless MAC protocol, 802.11i security, receive and transmit filtering, error recovery, and quality of service (QoS).
The AR9280 supports two simultaneous traffic streams using up to two integrated transmit chains and receive chains for high throughput and range erformance. Transmit chains combine baseband in-phase (I) and quadrature (Q) signals, convert them to the desired frequency, and drive the RF signal to multiple antennas. Receive chains use an integrated architecture that requires no off-chip intermediate frequency (IF) filters. The frequency synthesizer supoorts one-MHz steps to match frequencies defined by IEEE 802.11a/b/g/n specifications.
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