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Laptops with low power problems

EVDOforums.com Forum Index -> EVDO with a Wireless PC Data Card or ExpressCard

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Michael
Site Admin

Joined: 13 Jan 2005
Posts: 5461
Location: Cary, IL

Posted: Fri May 27, 2005 11:15 am Post subject: Laptops with low power problems

Quote:

My card exhibits very slow data rates, and/or automatically ends the connection.

A corresponding pop-up error window highlighting an issue with the USB driver follows the disconnection. This is not an issue with the USB driver, but is related to insufficient laptop power supply current to maintain the wireless connection. The AirCard580 / PC5220 wireless modem has been designed and is compliant to the 32-bit Cardbus electrical interface specification. Cardbus has been a standard in the PC Notebook industry since late 1997. Cardbus operates at 3.3 Volts, as compared to the older wireless network card standards which operate at 5 Volts. This lower voltage provides Cardbus implementations, including the AirCard580 / PC 5220 wireless modem, with some key advantages for power management and overall power efficiency. Unfortunately, some PC notebook implementations have hardware compatibility issues, particularly with respect to power delivery for high-current devices like the AirCard580 / PC 5220. We have tested a number of laptops from various vendors and have found some models where insufficient power has been observed. These include:

The above comes from the Sierra Wireless AirCard 580 manual. These laptops may have problems with other PC Cards as well.
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Michael
Site Admin

Joined: 13 Jan 2005
Posts: 5461
Location: Cary, IL

Posted: Tue May 31, 2005 2:20 pm Post subject:

A larger list is posted here: Sierra Wireless PC5220 / AC580 Compatibility Issues _________________ EVDO :: EVDO News :: EVDO Antennas :: Buy Verizon :: Buy Sprint :: EVDO Amplifier

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