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EHS6 AT Command Set
8.6 AT+CSQ
EHS6_ATC_V03.001 15/12/3
Confidential / Released
Page 174 of 513
8.6 AT+CSQ Signal quality
The AT+CSQ execute command indicates the received signal strength <rssi> and the channel bit error rate
<ber>.
Syntax
Parameter Description
0 -113 dBm or less
1 -111 dBm
2..30 -109... -53 dBm
31 -51 dBm or greater
99 not known or not detectable
According to 3GPP TS 27.007 [45], the <rssi> value is not applicable to 3G networks. It is therefore recom-
mended to use also AT^SMONI which delivers additional information, in particular the values RSCP, EC/n0,
SQual and SRxLev RX level. Nevertheless, please consider that connection quality in 3G networks is depending
on further factors. For example, despite good RSCP values for signal quality, data throughput may vary depend-
ing on the number of subscribers sharing the same cell.
To check the bit error rate there must be a dedicated channel opened to obtain realistic values. If no dedicated
channel is opened, there is no BER to be determined. In this case the indicated value may be 0 or 99, depending
on the SIM card.
0..7 as RXQUAL values in the table in 3GPP TS 45.008 [50] section 8.2.4.
99 not known or not detectable
Note
• The results of AT+CSQ are valid only after the ME has successfully finished network registration. Otherwise,
the commands returns only +CSQ: 99,99.
Test Command
AT+CSQ=?
Response(s)
+CSQ: (list of supported<rssi>s), (list of supported<ber>s)
OK
Exec Command
AT+CSQ
Response(s)
+CSQ: <rssi>,<ber>
OK
PIN Last Reference(s)
- + - 3GPP TS 27.007 [45]
<rssi>
(num)
<ber>
(num)
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