User's Manual

SIM800L Document
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At DCS1800 and PCS1900 band, the module is a class 1 device, so the module’s output power should not exceed
30dBm, and at the maximum power level, the output power tolerance should not exceed +/-2dB under normal
condition and +/-2.5dB under extreme condition.
4.2. Module RF Receive Sensitivity
The following table shows the module’s conducted receive sensitivity, it is tested under static condition.
Table
10: SIM800L conducted RF receive sensitivity
Frequency
Receive sensitivity（Typical）
Receive sensitivity(Max)
GSM850 -108dBm -106dBm
EGSM900 -108dBm -106dBm
DCS1800 -108dBm -106dBm
PCS1900 -108dBm -106dBm
4.3. Module Operating Frequencies
The following table shows the module’s operating frequency range; it is followed by the 3GPP TS 05.05 technical
specification requirement.
Table
11: SIM800L operating frequencies
Frequency Receive Transmit
GSM850 869 ~ 894MHz 824 ~ 849 MHz
EGSM900 925 ~ 960MHz 880 ~ 915MHz
DCS1800 1805 ~ 1880MHz 1710 ~ 1785MHz
PCS1900 1930 ~ 1990MHz 1850 ~ 1910MHz
5. Antenna interface
There are three antenna ports for SIM800L, GSM antenna port named RF_ANT, FM antenna port named
FM_ANT_P, The RF interface of the two antenna ports has an impedance of 50Ω.The maximum gain of the
GSM antenna gain should not exceed 3dBi considering the SAR radio. No antenna gain may be used that would
exceed the 2W EIRP power limit in 1900MHz band.
 The input impendence of the antenna should be 50Ω, and the VSWR should be less than 2.
 It is recommended that the GSM antenna be placed as far as better.
 The isolations of the three antenna should be bigger than 30dB
5.1 GSM Antenna Interface
There is a GSM antenna pad named RF_ANT for SIM800L the connection of the antenna must be decoupled