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SATELLINE-EASy / SATELLINE-EASy 869
User Guide, Version 3.0
16
3.3
Serial ports
Before connecting DTE (Data Terminal Equipment) to the radio modem, please make sure that
the configuration matches the physical interface (electrical characteristics, timing, direction and
interpretation of signals). The radio modem contains two separate serial ports that are
designated as Port 1 and Port 2. Only one port at a time can be selected for communication.
Port 1 - Always RS-232 (Port 1 ON is the default configuration)
Port 2 – The physical interface depends on which type of internal power/interface-module has
been installed at the factory. Available options are:
•
RS-232/RS-422 (delivered by default)
•
LVTTL
•
TTL
RS-422 interface of the radio modem can be adapted to RS-485 interface by wiring the signals
externally, see paragraph
RS-485 interface
.
3.4
LED indicators
There are five (5) LED indicators on the front panel of the radio modem
that indicate the status of the serial port and the radio interface:
LED Indication
OFF
Red
Orange Green
RTS RTS-line status (D15 Pin 13)
Inactive Active
-
-
CTS CTS-line status (D15 Pin 6)
Inactive Active
-
-
TD
TD-line status (D15 Pin 11)
Indicates that the radio modem is
receiving data via serial port.
No data Data
-
Test Tx
active
RD
RD-line status (D15 Pin 9)
Indicates that the radio modem is
sending data via serial port.
No data Data
-
-
CD
Indicates the status of the radio
interface. Note that the status of
CD-line (D15 pin 2) may differ
from the status of CD LED.
No
signal
Transmitter
is ON
Noise
Reception
NOTE! WHEN THE MODE-PIN (D15 CONNECTOR PIN12) IS CONNECTED TO GROUND,
THE RADIO MODEM IS IN THE PROGRAMMING MODE AND Port 1 IS THEN IN USE!
If Port 2 is to be used for data transmission, the serial cable must be changed to a suitable
type when switching over to the programming mode.