User's Manual

TXD
RXD
RTS
CTS
DTR
DCD
RI
TXD
RXD
RTS
CTS
DTR
DCD
/RING
DBG_TX
DBG_RX
/TXD
/RXD
MODULE (DCE)
CUSTOMER (DTE)
Serial port1
Serial port
Debug port
Serial port2
Connection of serial interfaces
Note: The RTS PIN must be connected to the GND in the customer circuit when only the TXD and RXD are
used in the Serial Port communication.
2.3 Antenna interface
The Pin 43 is the RF antenna pad. The RF interface has an impedance of 50Ω.
2.3.1 Antenna installation
M10 provides an RF antenna PAD for customer’s antenna installation. The customer’s antenna should be
located in the customer’s main board and connect to module’s antenna pad through microstrip line or other
type RF trace which the impendence must be controlled in 50Ω. To help the customer to ground the
antenna, M10 comes with 2 grounding pads located close to the antenna pad.
Pin definition of the RF_ANT
Name Pin Function
RF_ANT 43 RF antenna pad
GND 42
GND 44
If the customer installs the antenna via a soldered microwave coaxial cable, we would suggest the customer
to choose RF cable carefully so as to minimize the loss on the RF cable. And the recommended insertion
loss should try to meet the following requirements:
z GSM850/EGSM900<0.5dB
z DCS1800/PCS1900<1dB
M10_User_Guide_V1.00 - 7 -