Campbell CR300 Series Getting Started Manual page 17

Table 3-2: Signal quality
ECIO (3G)
Quality estimate
dBm
Excellent 0 to -6
Good -7 to -10
Fair to poor -11 to -20 -13 or less
RSRQ (4G)
dBm
>-9
-9 to-12
3. Cellular communications option 15