User's Manual

Appendix B. Basic Parameters
BreezeACCESS II Series 24 SU-R Installation Manual
Note:
The ESSID string is case-sensitive.
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Maximum Data Rate
– Displays the current maximum data rate, and allows entry of a new
value for the maximum data rate.
BreezeACCESS
units operate at 1 Mbps, 2 Mbps or 3 Mbps. Under certain conditions
(compatibility reasons or range/speed trade-off), you may decide to limit the use of higher
rates. If the quality of the link is not good enough, it is recommended to decrease the value of
these parameters (the higher the date rate, the higher the error rate). Otherwise, there is a high
probability that the unit will have to retransmit many frames several times before temporarily
reducing the data rate. A high number of retransmissions reduces the overall throughput for
the selected SU as well as for all the other SUs served by the same AU.
The link quality can be estimated based on the RSSI measurement using the Continuous Link
Quality Display in the SU. If the measured RSSI is less than a certain threshold, it is
recommended to decrease the Maximum Data Rate of the SU in accordance with the following
table:
Recommended Maximum Data Rate 3Mbps 2Mbps 1Mbps
BreezeACCESS MMDS SU-I/ID RSSI>65 53<RSSI<65 RSSI<53
The default value is 3 Mbps. Allowed values are 1, 2 or 3 Mbps.
The AU learns the Maximum Data Rate used by each SU during the association process, and
uses this rate for transmissions to the specific SU.
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Transmit Antenna
– Displays which antennas are used for transmission. SU-R units support
transmit antenna diversity (2 antennas). During reception, a BreezeACCESS unit that is
connected to two antennas dynamically selects the antenna where reception is optimal. In
contrast, if the transmit antenna diversity is enabled, the unit selects the antenna from which it
will transmit before the actual transmission. It usually uses the antenna last used for
successful transmission. In installations where a model that can support antenna diversity is
connected to a single antenna, Transmit Antenna Diversity should be configured to transmit
only from that single antenna. Available selections are:
⇒ Use Two Antennas
⇒ Use Antenna No. 1
⇒ Use Antenna No. 2