About the Spectrum24 Wireless LAN Adapter
6 Spectrum24 Wireless LAN Adapter Users Guide
2.3 Power Management
LA-4121 PC Cards support the Continuously Aware (CAM) and Power Save
Polling (PSP) power-management modes. CAM requires the radio to remain
on. Symbol does not recommend CAM for battery powered devices.
The PCI version of the Spectrum24 WLAN adapter (model LA-4123)
functions in CAM only.
PSP mode allows the PC Card to conserve power by suspending
communication for short periods of time while still associated with an AP.
The AP saves data for transmission to the PC Card when it wakes at given
intervals. When the PC Card wakes to check for data, it switches back into
CAM until it is ready to suspend communications again.
The PSP performance index, which varies from Excellent to Acceptable,
allows users to specify how often the PC Card wakes to check for data.
The Excellent PSP performance index provides the quickest response time
(shortest sleep interval), while the Adequate PSP performance index provides
efficient power consumption (longest sleep interval). Use the Adequate
performance index when periods of PC Card inactivity are anticipated or
when using a battery for a notebook computer.
Use the Symbol Mobile Companion Power Property Page utility to manually
set the PSP performance index.
2.4 Plug and Play
The PCI version of the Spectrum24 WLAN adapter (model LA-4123) supports
Plug and Play systems. This allows a computer to recognize the PCI adapter,
and configure the hardware interrupt, memory and device recognition
addresses. This feature requires less user interaction and minimizes
hardware conflicts.
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