Configuration Parameters | 31 |
For Singapore:
An 802.11a network adapter can use one of four Channels: Channel 36 (5.18 GHz), Channel 40 (5.20 GHz), Channel 44 (5.22 GHz), or Channel 48 (5.24 GHz). If you wish to install multiple Ad Hoc networks in the same vicinity, Proxim recommends that you configure each network with a unique Channel to avoid interference between networks.
Send Rate
The IEEE 802.11a specification supports eight data rates: 54 Mbps, 48 Mbps,
36 Mbps, 24 Mbps, 18 Mbps, 12 Mbps, 9 Mbps, and 6 Mbps. Harmony’s 2X mode supports eight data rates: 108 Mbps, 96 Mbps, 72 Mbps, 48 Mbps, 36 Mbps,
24 Mbps, 18 Mbps, and 12 Mbps.
As a mobile client travels away from an 802.11a Access Point (when in Infrastructure mode) or from other 802.11a nodes (when in Ad Hoc mode), the data rate automatically decreases in order to maintain a usable radio connection.
For example, in an Infrastructure network that is using 2X mode, a client that is close to an Access Point may operate at 108 Mbps, but a client that is far away from the Access Point may operate at 12 Mbps.
By default, a Harmony 802.11a network adapter automatically adjusts the transmit rate depending on the mode of operation
For example, if you configure the Send Rate to 36 Mbps, a Harmony 802.11a adapter will operate at 36 Mbps.
Fragmentation
The Harmony 802.11a network adapters support an optional feature called Fragmentation. In harsh radio environments, 802.11a devices may have difficulty transmitting large packets that exceed a certain size. However, when Fragmentation is enabled, an 802.11a device can break up large packets into a number of smaller packets (called “fragments”) that can be successfully transmitted to another 802.11a device. The receiving 802.11a device then reassembles the original packet once it has received all of the fragments.
You can configure a Harmony 802.11a network adapter to never use Fragmentation or to fragment only those packets that exceed a certain size. For example, if the Fragmentation Threshold is set to 1000 Bytes, then a sending radio will fragment any packet 1000 Bytes or larger before transmitting.
The Fragmentation Threshold supports a range between 256 and 2345 Bytes. If set to 256, then a sending radio will fragment all packets 256 Bytes or larger. If set to 2345, then a sending radio will fragment only those radio packets that are 2345 Bytes or larger.
By default, Fragmentation is disabled.
