Received Signal Strength
2.5
2.3
2.1
1.9
1.7
1.5
1.3
1.1
0.9
0.7
0.5
-130 -120 -110 -100
-90
-80
-70
-60
-50
-40
RF Level (dBm)
Figure 5: RSSI voltage variation with respect to RF level at BHX2
If the microcontroller has a built-in Analogue to Digital Converter (ADC), the Received Signal
Strength Indicator (RSSI) output voltage level can be read by the microcontroller to estimate its
distance from transmitting BHX2 unit or identify areas of weak signal reception.
RSSI can also be used to make a decision to switch to the second antenna in fixed installations
within building where the probability of null-spots are higher.
Radiometrix Ltd
BHX2 Data Sheet
page 5
RADIOMETRIX [ RADIOMETRIX LTD ]
