A8 GNSS RTK System Operation Manual
Eight-pin port:
Named as C OM 1/USB/PW1, Generally
used for
the connection betw een the receiver mainframe and computer,
controller, or for data download and data delete.
Signal De finition
Small Five-pin Signal
larger Eight-pin Signal
GND Earth
RXD Data Input
GND Earth
USB D-
Vin Power Input
USB D+
RXD Data Input
USB V+
TXD Data Output
Vin Power Input
GC-2 Cable Insert Mark
TXD Data Output
GND Earth
2. Cable Insert Mark GC-1, GC-2 signal can work with the cable
connect earth internal only.
3. All the round plug seats from Hi-Target name the pin by positive
counterclockwise; ro und plug name the pin by welding face
counterclockwise.
4. All above data output (TXD) and input( RXD) signal are base on
receiver. TXD is a sig nal transmit line for receiver and RXD is receive
line for receiver.
5. The connect signal for PC se rial port DB9 are: 2 (RXD computer
data signal to receive)
，
3( TXD computer data signal to
transmit),5(GND earth). In a simple word
“
2 for receiver 3 for
transmit
”
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