Signal Strength; Signal Quality - Campbell CELL200 Series Product Manual

9.3.1 Signal strength

Signal strength is how strong the received signal is. The closer your CELL200 series is to the
cellular tower, the more signal the antenna will pick up. Signal strengths are lower the farther
away from the tower the CELL200 series is.
For 3G networks, signal strength is reported as RSSl (Received Signal Strength Indicator). For 4G,
it is RSRP (Reference Signal Received Power).
Signal strength units are –dBm; –70 is a stronger signal than –100.
Table 9-2: Signal strength
Strength estimate
Excellent -70 or greater -90 or greater
Good
Fair
Poor less than -100 less than -115

9.3.2 Signal quality

Signal quality shows how much interference there is between the cellular tower and CELL200
series, or how noisy a band is. Cellular signal noise comes from reflections, ghosting and other
interference. Better signal quality is an indicator of more successful communications during
precipitation events such as rain and snow.
For 3G networks, signal quality is ECIO (Energy to Interference Ratio). For 4G, this is RSRQ
(Reference Signal Received Quality).
Signal quality units are –dBm; 0 is a better signal than –10.
Table 9-3: Signal quality
ECIO (3G)
Quality estimate
Excellent 0 to -6
Good -7 to -10
Fair to poor -11 to -20 -13 or less
RSSI (3G) RSRP (4G)
dBm dBm
-71 to -85 -91 to -105
-86 to -100 -106 to -115
RSRQ (4G)
dBm dBm
>-9
-9 to-12
CELL200-Series 4G LTE Cellular Module 61