User's Manual

Configuration Parameters 19
Power Saving Mode
The Harmony 802.11a PCI Card supports optional power management to conserve
battery life. Power Saving Mode is only available if the PCI Card is operating in
Infrastructure mode.
When Power Saving Mode is set to Normal or Maximum, the Harmony 802.11a PCI
Card enters a “doze” mode where the card becomes inactive and only wakes up
periodically to receive control messages from the Access Point. The card wakes up
more often in Normal mode than in Maximum mode so a card in Normal mode will
respond sooner to network requests than a node in Maximum mode. However,
Maximum mode draws less power than Normal mode.
When an Access Point receives a packet destined for a dozing client, it buffers the
packet and includes a notification within its control message to alert the client that a
packet is waiting for it. Once the card receives the control message, it polls the Access
Point to request that the buffered packet be sent to it.
2X Mode
The Harmony 802.11a PCI Card supports 2X
TM
mode, a high-speed operating mode
that can provide data rates of up to 108 Mbps, twice the speed of standard 802.11a
devices. By default, 2X mode is disabled.
When 2X mode is disabled, the PCI Card complies with the IEEE 802.11a standard, can
operate on one of eight Channels, and can achieve speeds of up to 54 Mbps.
When 2X mode is enabled, the PCI Card does not comply with the IEEE 802.11a
standard, can operate on one of three Channels, and can achieve speeds of up to
108 Mbps.
Note: You must configure all devices in the same network to use 2X mode. A
device in 2X mode cannot communicate with a device in 802.11a mode.