M300 Plus GNSS Receiver User Guide
9
3.3 Rear connectors
All connectors are located on the back of the receiver, you can connect other
external devices through these connectors.
1 Port for external power supply, and internal battery charging of the receiver
2
Ethernet Port
Connect to internet
3
Com1 Port of Main Board (RS232 port)
Control the mainboard and request data from this port
4
SIM card slot
Install sim card
5
4G antenna Connector
Connect to 4G antenna
6
10 MHz frequency input
10MHz external frequency input, Used for precision timing
7
WIFI Antenna connector(Reserved)
8
GNSS Antenna Connector
Connect to the GNSS antenna
9
USB
Connect to external USB drive for external data logging
10 Lemo to USB Data Download Connector
Connect with PC to download raw data from the internal memory
11
Com2 Port of Main Board
Connect with Meteorological sensor, RS-485 communication protocol; receive and
save meteorological data in RINEX format
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