18
AGRI-ALERT WIRELESS MODULE rev.04
AGRI-ALERT WIRELESS MODULE
4.2.3 Verifying the Received Signal Strength
Indicator (RSSI)
Before making any permanent installation, you must
make sure the radio frequency (RF) signal is properly
received in each auxiliary building. Status leds indicat-
ing the received signal strength (RSSI) are located on
the circuit board of each Wireless module. These pilot
lights indicate how well Auxiliary Wireless module com-
municate with the Master Module.
It is also possible to check the communication statistics
directly on the AA9600 system (see section 4.2.3.2).
4.2.3.1 Verifying the Signal on the Auxiliary Wireless Module
Check the RSSI on the Auxiliary Wireless only
(the signal strength on the Master module is
not suitable).
At least 2 RSSI LEDs must be lit on each
Auxiliary wireless module for the system to
have accept able performances (Fair signal
reception).
a) Choose a fix location for the Master Wireless
module and its antenna. Antenna positions in
auxiliary buildings will be based on the master
building.
b) Power the Master Wireless module and the
AA9600 unit.
c) Mount a second antenna on rigid PVC pipe and
connect it to an Auxiliary Wireless module.
d) Power the Auxiliary module using a battery.
e) Position the antenna next to the auxiliary build-
ing and verify the received signal strength.
Permanent antenna installation can be performed
if at least two RSSI LEDs are lit.
MASTER BUILDING
M
SBI
AUXILIARY
BUILDING
Figure 17 Verifying the Received
Signal Strength
Figure 16 RSSI LEDs’ Location
RADIO
RSSI
EXCLNT
GOOD
FAIR
WEAK
RSSI LEDS