User's Manual

Smart Machine Smart Decision
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Frequency
Receive sensitivity（Typical）
Receive sensitivity(Max)
GSM850,EGSM900 < -109dBm < -107dBm
DCS1800,PCS1900 < -109dBm < -107dBm
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: SIM800C operating frequencies
Frequency Receive Transmit
GSM850 869 ～ 894MHz 824 ～ 849MHz
EGSM900 925 ～ 960MHz 880 ～ 915MHz
DCS1800 1805 ～ 1880MHz 1710 ～ 1785MHz
PCS1900 1930 ～ 1990MHz 1850 ～ 1910MHz
5. Antenna Interface
SIM800C provides GSM antenna named GSM_ANT, customer could use 50Ω microstrip line or stripline
antenna connect to the module.
The maximum gain of the Main 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.
It have according to reference trace and matching circuit testing all FCC items,and all items satisfy FCC
requirements.Only the reference trace and matching circuit is certified, antenna design must refer to it, any other
deviations require testing Class II applications as required by FCC.
The certified matching circuit as following:
Figure4: GSM antenna matching circuit
R101，C101，C102 are the matching circuit, the value should be defined by the antenna design. Normally R101
is 0Ω, C101 and C102 are not mounted.