User's Guide

itored by clicking on the related line, as reported in Fig. 7.12. Several real-
time parameters are displayed including the current signal strength, the
packet error rate, and the link utilization of both link directions (i.e. the link
from a unit to the other and vice-versa). Additionally, the current congestion
level of the link is monitored. A detailed description of the available param-
eters is reported in Table 7.3. Visual alarms and warnings are triggered
whenever anomalous conditions are detected, as described in Table 7.4.
Warnings are of two types: link and unit. When unit warnings are trig-
gered, the unit color becomes yellow. The warning details are available by
clicking on the unit element. The link warnings notification can be disabled
by removing the “Warning” flag in the FMQuadro top panel.
Metric Description
Current TX Rate Current link transmission rate in Mb/s.
Packet Error Rate Percentage of packet dropped due to excessive trans-
mission errors.
Link Error Rate Percentage of packet retransmissions due to trans-
mission errors.
Signal Strength Current received signal level in dBm.
Link Utilization Percentage of the current link utilization for data
transmission in a pie chart format.
Table 7.3: Link metrics description.
Warning Type Cause
Low Signal Strength Link Link Signal Strength < 60%.
High Error Rate Link Packet Error Rate > 5%.
High Link Congestion Link Link Utilization > 80%.
Ethernet Capacity Overflow Unit Plug-in capacity exceeded.
Hidden Terminal Detected Unit Hidden terminal detected by the
FluidMAX engine.
Table 7.4: FMQuadro warning description.
Through the link status callout, the user can also check the level of interfer-
ence of the selected link by clicking on the “Check for Interference” button.
The link interference is analyzed on both sides of the link by the FMQuadro
engine and the interface suggests, in case of detected problems, a set of
preferred channel frequencies that the radio link is recommended to be set
to.
All the link metrics are continuously monitored by the FMQuadro engine
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