Quectel UG Series User Manual

UMTS/HSPA Module Series
WCDMA UGxx AT Commands Manual
WCDMA_UGxx_AT_Commands_Manual Confidential / Released 78 / 247
Parameter
Example
AT+CSQ=?
+CSQ: (0-31,99),(0-7,99)
OK
AT+CSQ
+CSQ: 28,0 //Returns that the current signal strength indication is 28
and channel bit error rate is 0
OK
OK
Execution Command
AT+CSQ
Response
+CSQ: <rssi>,<ber>
OK
+CME ERROR: <err>
Execution Command returns received signal strength
indication <rssi> and channel bit error rate <ber> from the
ME. Test Command returns values supported by the TA.
Maximum Response Time
300ms
Reference
3GPP TS 27.007
<rssi> 0 -113dBm or less
1 -111dBm
2...30 -109... -53dBm
31 -51dBm or greater
99 Not known or not detectable
According to 3GPP TS 27.007 [47], the <rssi> value is not applicable to 3G networks.
Yet, with a view to employing +CSQ for all networks has been designed to show a
<rssi> value derived from the 3G specific RSCP parameter is shown by AT+QENG.
Nevertheless, please note that connection quality in 3G networks is depending on
further factors. For example, despite good <rssi> or RSCP values for signal quality,
data throughput may vary depending on the number of subscribers sharing the same
cell.
<ber> Channel bit error rate (in percent)
0...7 As RXQUAL values in the table in 3GPP TS 45.008 subclause 8.2.4
99 Not known or not detectable
Quectel
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Quectel UG Series Specifications

General

Brand	Quectel
Model	UG Series
Category	Control Unit
Language	English