User's Manual

Table Of Contents
31
DragonWave Inc. Features
3.16 Radio Port Performance Monitoring
Lite provides sophisticated performance monitoring method to allow customer to
monitor its working status, e.g.,
Tx/Rx power statistics do the Tx/Rx monitoring and the attenuation change informa-
tion collection;
EVM statistics do the link quality monitoring;
Link available time adds up the working time of the link;
Packet error statistics do the packet error calculation in both real time and history,
allowing the customer to understand the impact of link quality degradation;
Interference statistics do the co-channel interference and off-channel interference
calculation in both real time and history to help the customer make manual operation
when it is needed.
3.17 Adaptive Noise Immunity (ANI)
5 GHz unlicensed band often operates in challenging environment with many different
sources of interference, compromising the performance of Lite.
Many system can operate in the same frequency band, such as WLAN devices, wireless
cameras and microwave ovens. This may have significant influence on Lite. By activat-
ing Adaptive Noise Immunity, Lite ignores sources of interference in the radio field and
only focuses on remote Lite with sufficient signal strength. This process is based on
measured values of the link with regard to interferences in the radio field. If a defined
threshold is exceeded, the reception sensitivity of Lite will be reduced respectively.
Therefore, the probability is increased that the system will ignore interferences while
searching for a free transmission slot. These adaptive changes of the reception sensi-
tivity are based on the permanent check of the radio field.