SIM Tech SIMCom SIM900-DS Hardware Design page 41

9
10
11
12
13
14
15
16
17
18
19-31
Table 24 : SIM900-DS DCS1800 and PCS1900 conducted RF output power
PCL Nominal output power (dBm)
29
30
31
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15-28
For the module's output power, the following is should be noted:
At GSM850 and EGSM900 band, the module is a class 4 device, so the module's output power should not exceed
33dBm, and at the maximum power level, the output power tolerance should not exceed +/-2dB under normal
condition and +/-2.5dB under extreme condition.
At DCS1800 and PCS1900 band, the module is a class 1 device, so the module's output power should not exceed
SIM900-DS_Hardware Design_V1.00
25
23
21
19
17
15
13
11
9
7
5
DCS1800 and PCS1900
36
34
32
30
28
26
24
22
20
18
16
14
12
10
8
6
4
2
0
Smart Machine Smart Decision
±3
±3
±3
±3
±3
±3
±3
±5
±5
±5
±5
Tolerance (dB) for conditions
Normal
±2
±3
±3
±3
±3
±3
±3
±3
±3
±3
±3
±3
±4
±4
±4
±4
±4
±5
±5
41
±4
±4
±4
±4
±4
±4
±4
±6
±6
±6
±6
Extreme
±2.5
±4
±4
±4
±4
±4
±4
±4
±4
±4
±4
±4
±5
±5
±5
±5
±5
±6
±6
2013-01-20