Quectel EC25 User Manual

LTE Module Series
EC25&EC21 AT Commands Manual
EC25&EC21_AT_Commands_Manual 78 / 231
6.3. AT+CSQ Signal Quality Report
The command indicates the received signal strength <rssi> and the channel bit error rate <ber>.
Parameter
AT+CSQ Signal Quality Report
Test Command
AT+CSQ=?
Response
The Test Command returns values supported by the TA.
+CSQ: (list of supported <rssi>s),(list of supported <ber>s)
OK
Execution Command
AT+CSQ
Response
The Execution Command returns received signal strength
indication <rssi> and channel bit error rate <ber> from the
ME.
+CSQ: <rssi>,<ber>
OK
+CME ERROR: <err>
Maximum Response Time
300ms
Reference
3GPP TS 27.007
<rssi> 0 -113dBm or less
1 -111dBm
2...30 -109dBm... -53dBm
31 -51dBm or greater
99 Not known or not detectable
100 -116dBm or less
101 -115dBm
102...190 -114dBm...-26dBm
191 -25dBm or greater
199 Not known or not detectable
100~199 Extended to be used in TD-SCDMA indicating received signal code
power (RSCP)
<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 EC25 Specifications

General

Category	LTE Module
LTE TDD	B38/B40/B41
WCDMA	B1/B5/B8
GSM	850/900/1800/1900 MHz
Data rates	LTE Cat 4: 150 Mbps DL/50 Mbps UL
GNSS	GPS/GLONASS/BeiDou/Galileo/QZSS
Operating Temperature	-40°C to +85°C
Form Factor	LCC
Storage Temperature	-45°C to +90°C
SIM Interface	1.8V/3.0V
Antenna Interface	Main, Diversity, GNSS
LTE FDD	B1/B3/B5/B7/B8/B20
Interfaces	USB 2.0, UART, PCM, GPIO
Operating Voltage	3.3V - 4.3V
Protocols	TCP/IP, UDP, FTP, HTTP, HTTPS
Certifications	CE, FCC, PTCRB, GCF, RCM, IC