Telit LE910 V2 Series AT Commands
80446ST10707A Rev. 0– 2015-11-03
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 95 of 509
Mod. 0808 2011-07 Rev.2
Signal Quality - +CSQ
Execution command reports received signal quality indicators in the form:
+CSQ: <rssi>,<ber>
where
<rssi> - received signal strength indication
0 - (-113) dBm or less
1 - (-111) dBm
2..30 - (-109)dBm..(-53)dBm / 2 dBm per step
31 - (-51)dBm or greater
99 - not known or not detectable
<ber> - bit error rate (in percent)
0 - less than 0.2%
1 - 0.2% to 0.4%
2 - 0.4% to 0.8%
3 - 0.8% to 1.6%
4 - 1.6% to 3.2%
5 - 3.2% to 6.4%
6 - 6.4% to 12.8%
7 - more than 12.8%
99 - not known or not detectable
Note: in GSM, the received signal strength indication is the average of the
received signal level measurement samples in dBm, taken on a channel within the
reporting period of length one SACCH multi frame, and is mapped as above.
For UMTS, the current radio signal strength indicates CPICH RSCP in levels.
According to the specification 3GPP TS25.133, the level range is from 0 to 91, with
0 less than (-115) dBm
1 (-115) dBm...(-114) dBm
.
.
.
91 (-25) dBm or greater
99 - not known or not detectable
Values between -115dbm and -120dbm will all be represented by level 0
To be compliant with 3GPP TS27.007 specification, the above 0...91 levels are
mapped to range 0...31:
3GPP TS25.133 Level Scaled (displayed) RSSI
3 or less 0
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