Rainbow Electronics GE863-GPS low power - Manual (Page 20)

GE863-GPS Software User Guide
1vv0300724 Rev. 3 - 05/07/07
Reproduction forbidden w ithout Telit Communications S.p.A. w ritten authorization - All Rights Reserved page 20 of 122
2.5.3.3 Check for received signal strength & quality
Once the mobile has registered on one network, it may be useful to know the received signal strength
& quality to give the user an indication of the reliability of the network.
•
send command AT+CSQ
•
wait for response in the format:
+CSQ: ,
OK
where:
is an integer from 0 to 99 that indicates the received signal strength:
value Signal strength Indication
0 -113 dBm or less Signal is VERY low: at the extreme sensibility limit
1 -111 dBm MMI may indicate only 1 antenna bar
2 -109 dBm MMI may indicate only 1 antenna bar
3 -107 dBm MMI may indicate only 1 antenna bar
4 -105 dBm MMI may indicate only 1 antenna bar
5 -103 dBm MMI may indicate only 1 antenna bar
6 -101 dBm MMI may indicate 2 antenna bars
7 -99 dBm MMI may indicate 2 antenna bars
8 -97 dBm MMI may indicate 2 antenna bars
9 -95 dBm MMI may indicate 2 antenna bars
10 -93 dBm MMI may indicate 3 antenna bars
11 -91 dBm MMI may indicate 3 antenna bars
12 -89 dBm MMI may indicate 3 antenna bars
13 -87 dBm MMI may indicate 3 antenna bars
14 -85 dBm MMI may indicate 3 antenna bars
15 -83 dBm MMI may indicate 4 antenna bars
16 -81 dBm MMI may indicate 4 antenna bars
17 -79 dBm MMI may indicate 4 antenna bars
18 -77 dBm MMI may indicate 4 antenna bars
19 -75 dBm MMI may indicate 4 antenna bars
20 -73 dBm MMI may indicate 4 antenna bars
21 -71 dBm MMI may indicate 4 antenna bars
22 -69 dBm MMI may indicate 4 antenna bars
23 -67 dBm MMI may indicate 4 antenna bars
24 -65 dBm MMI may indicate 4 antenna bars
25 -63 dBm MMI may indicate 4 antenna bars
26 -61 dBm MMI may indicate 4 antenna bars
27 -59 dBm MMI may indicate 4 antenna bars
28 -57 dBm MMI may indicate 4 antenna bars