2.7 Received Signal Strength Indicator (RSSI)
The RSSI output of the RCM module is useful for transmission range tests. By indicating the
strength of an incoming RF signal, this output allows the assessment of RF link quality and
transmission range. The RSSI pin output voltage is typically 0.9 V with no RF signal, rising to
typically 2.6 V at maximum signal. The external loading should be kept to a minimum since
the RSSI output source impedance is around 20 kOhm. The following shows a typical RSSI
characteristic:
500
1000
1500
2000
2500
3000
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
RF input (dBm)
RSSI output (mV)
Figure 11: RSSI output characteristics
©EnOcean GmbH
Page 13 of 20
RCM 152 User Manual V1.31
