OK
Note: The modem will output "ERROR" when a command is entered incorrectly.
To enable verbose error mode to see what error is occuring issue AT+CMEE=2
to the modem.
2.11. Test Signal Strength
2.11.1.
For Non-LTE Modems
In the terminal program, type the command:
AT+CSQ
followed by the Enter key, and the terminal should respond with:
+CSQ: xx,yy
where xx is the signal strength of the antenna, and yy is the bit error rate in
percent. Typical values are as follows:
Values of xx
Relative Signal Strength
0 – 9
Poor: <= -95 dBm
10 – 14
OK: -93 dBm to -85 dBm
15 – 19
Good: -83 dBm to -75 dBm
20 – 30
Excellent: -73 dBm to -53 dBm
31
Excellent: -51 dBm or greater
99
Not known or not detectable
Values of yy
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: Bit Error Rate only available during active data connections.
2.11.2.
For LTE Modems
To check the signal strength on an LTE modem the user should refer to the
RSRP (Reference Signal Received Power) & RSRQ (Reference Signal Received
Quality) values reported by the modem. These signal measurements will more
accurately reflect the quality of the cellular link for LTE modems by not only
PN 30005 rev 23
© NimbeLink Corp. 2019. All rights reserved.
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