User's Manual

16
Brand of ACOEM
Figure 12: site survey example where all the information needed are identified
1.2. FIELD TEST
The second step is a field test to verify the reception of the farthest sensors or those with
doubts about their reception because of their situation (metallic surroundings, casing,
guards...) and
Perform a temporary installation in order to try out different gateway options and Eagle
sensors locations.
4. VERIFY THE PLAN WITH A TEMPORARY (OPTIONAL) INSTALLATION
When the planner is not confident due to inexperience or due to a particularly tricky
installation, it is warranted to perform a temporary installation in order to try out different
Gateway antenna options and Eagle Field Device locations. Typically the Eagles within the
“Just Works!” range are installed permanently from the onset. The remaining Eagles are
temporarily moved to the suspected troublesome locations and their signal strength
monitored using the gateway web application. It is common practice to immediately install
the Eagle permanently once the link quality is confirmed.
The signal strength of every device can be monitored from the web application of the
gateway. It is advisable to improve the signal strength for devices lower than -80dBm.
Table 9 : signal strength qualification
Signal strength
Quality
Action
-30 to -50 dBm
Excellent
-50 to -60 dBm
Good
-60 to -80 dBm
Fair
Can be improved using an expander
< -80 dBm
Poor
Must be improved using an expander
< -90 dBm
Out of coverage
Must be improved using an expander
ILLUSTRATION
SITE SURVEY