User's Manual
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Shanghai Simcom Manuals
Electronics
GSM/GPRSModule
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SIM840W
EVB
User
Guide
SIM840W
-EVB_UGD_V1.00
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2. EVB accessory
Figure 3: EVB accessory
A: antenna
B: antenna transm
it line
C: 5V DC
source adapter
D: serial port line
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