Shandong USR IOT Technology Limited USRGM3 사용자 설명서
USR-GM3/GM3s User Manual
Jinan USR IOT Technology Limited
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34
NC
N
Keep no connecting
35
TXD1
O
TX line for uart1
36
RXD1
I
RX line for uart1
37
CTS1
O
CTS line for uart1
38
RTS1
I
RTS line for uart1
39
GND
P
Power ground
40
GND
P
Power ground
41
RF
O
RF output
42
GND
P
Power ground
3.1.5.
3.1.5.
3.1.5.
3.1.5.Outside
Outside
Outside
Outside Antenna
Antenna
Antenna
Antenna
1.
The line of Antenna should be short to make the insert loss lower and routed as RF
line strictly to keep 50ohm matching.
2.
It’s better to put the antenna pad on the edge of the PCB.
3.2.
3.2.
3.2.
3.2. Hardware
Hardware
Hardware
Hardware B
B
B
Block
lock
lock
lock D
D
D
Diagram
iagram
iagram
iagram
The interface module provides includes: power input, output, on/off control, reset to restart
control, control, restore the factory Settings, working module, analog audio input, output, UART,
SIM, RF antenna.
control, control, restore the factory Settings, working module, analog audio input, output, UART,
SIM, RF antenna.