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REVIEWS - X-micro WLAN 11g PCMCIA CARD
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Introduction & Technology

March 22nd, 2004 12:36 pm - Doc | [ Bottom ]  

Manufacturer: X-micro
Author: Aleksandr Kagan

Introduction:

As we move deeper into the wireless era, we strive for faster Internet speeds. Slow wireless access is becoming archaic and now we are trying to satisfy our selves with the new emerging online multimedia, such as bigger macromedia flash movies or high resolution video streaming. Today we take a look at new offering from X-micro, a PCMCIA 802.11g card. It is a vast improvement from the previous 802.11g card, it moves up all the way from 11Mbps to turbo charged 108Mbps.

Estimated Price: 49 USD



Specifications:

  • IEEE 802.11g

  • Interface: PCMCIA

  • Frequency: 2.412-2.484 GHz ISM Band

  • Reach between 30 to 300 meters

  • Data Rates: 802.11g up to 54Mbps and up to 108Mbps when super G is enabled

  • Sensitivity: Rx < -92dBM

  • Antenna: Chip Antenna

  • Power: 3.3Volt

System Requirements:

  • PC-compatible computer, CPU speed of 200 Mhz or above

  • Memory: 64MB or above, 128MB recommended

  • Microsoft Windows 98SE/ME/2000/XP/Linux

Technology:

There are several specifications in the 802.11 family:

  • 802.11 -- applies to wireless LANs and provides 1 or 2 Mbps transmission in the 2.4 GHz band using either frequency hopping spread spectrum (FHSS) or direct sequence spread spectrum (DSSS).

  • 802.11a -- an extension to 802.11 that applies to wireless LANs and provides up to 54 Mbps in the 5GHz band. 802.11a uses an orthogonal frequency division multiplexing encoding scheme rather than FHSS or DSSS.

  • 802.11b (also referred to as 802.11 High Rate or Wi-Fi) -- an extension to 802.11 that applies to wireless LANS and provides 11 Mbps transmission (with a fallback to 5.5, 2 and 1 Mbps) in the 2.4 GHz band. 802.11b uses only DSSS. 802.11b was a 1999 ratification to the original 802.11 standard, allowing wireless functionality comparable to Ethernet.

  • 802.11g -- applies to wireless LANs and provides 20+ Mbps in the 2.4 GHz band.

Here we have a clear view of the 802.11 technology.

802.11a 802.11b 802.11g
Spectrum 5GHz 2.4GHz 2.4GHz
Data-capacity 54Mbps (72Mbps) 11Mbps 54Mbps / 108Mbps
Throughput 25-27Mbps 5-6Mbps 25-27Mbps / 27+ Mbps
Signal range 50-70m 100m 100m
Capacity 8-12 channels 3 channels 3 channels
Audio Support Yes No No
Approved by IEEE September 1999 September 1999 November 2001

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