User's Manual

SEQUANS Communications Confidential and Proprietary
GM01Q/NB01Q User Manual,
Revision 1 Application Note
14/22
4.4. Checking the Signal Strength
 When your Kit is connected to a network, you can check the signal strength and
characteristics through the following AT Command
o AT+CSQ
o Response will be
+CSQ:<rssi>,<ber>
where <rssi> represents the signal strength at the antenna and <ber> is the bit
error rate in %.
<rssi> Conversion Table
<rssi> Parameter
Signal Description with RSSI Value Range
0-9
Marginal: -113 dBm to -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
Unknown or not detectable
<ber> Conversion Table
<ber> Parameter
Bit Error Rate (in %)
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
Unknown or not detectable
4.5. Sending Data through the Test Kit
 When your Kit is connected to a network, you can send and receive data through it to
the network
 To perform this operation, you need to create the modem interface and establish a PPP
connection between the Windows host and the Kit.
 A sequans tool labelled sqncom2ppp needs to be installed and some configurations
are needed.