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LT-300 User & Installation Manual
Serial Port (RS-422)
Illustration of a RS-422 interface in between a serial port and the LT-300 GNSS Receiver for providing a
communication link for the LT-Service Tool, see Figure 39. The RS-422 interface is balanced and more robust
than an unbalanced serial interface, which is illustrated in Figure 40.
F
IGURE
LINK IN BETWEEN THE
NOTE:
The RS-422 interface is using both Tx and Rx transmission lines (balanced/differential) and is
therefore a more robust communication link than the RS-232 interface. The LT-300 GNSS
Receiver is supporting both RS-422 and RS-232 communicating link to the LT-Service Tool.
Serial port (RS-232)
Illustration of a RS-232 interface in between a serial port and the LT-300 GNSS Receiver for providing a
communication link for the LT-Service Tool, see Figure 40.
F
40: RS-232 (
IGURE
BETWEEN THE
NOTE:
When using the RS-232 (unbalanced) serial communication link, it is important that the RxD-
signal level from the serial port is > 5 VDC for proper operation.
Lars Thrane A/S
39: RS-422 (
)
BALANCED
SERIAL INTERFACE PROVIDING THE COMMUNICATION
LT-S
T
ERVICE
)
UNBALANCED
SERIAL INTERFACE PROVIDING THE COMMUNICATION LINK IN
LT-S
T
ERVICE
OOL AND THE
LT-300 GNSS R
OOL AND THE
LT-300 GNSS R
.
ECEIVER
www.thrane.eu
.
ECEIVER
Connecting
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