User's Manual

SATELLINE-4Pro
User Guide v0.93 DRAFT
20
6 CONNECTION INTERFACES
6.1 RS-232 interface
RS-232 standard defines the method of serial data transfer between a computer and its peripherals.
The definition includes both the interface type and signal levels. Most computers and peripherals
contain one or more RS-232 type serial ports. The RS-232 standard uses transmission lines, in
which each single signal line level is referenced, to a common ground level. RS-232 has been
designed to be use in serial transfer of data, in situations where the distance between
communicating equipment is less than 15 m. The otherwise useful RS-232 standard is applied in a
multitude of slightly differing ways, (e.g. different pin configurations) and for this reason different
computers and peripherals are not necessarily directly compatible with each other.
6.2 Connectors
The device adopts a high standard waterproof ODU 8-pin data connector. Antenna connector
type is 50 Ohm TNC female.
Data connector ( 8 pin ODU)
 DTE is an abbreviation for Data Terminal Equipment
 I/O column below denotes the direction of the signal
 “IN” is from DTE to the radio modem, “OUT” is from the radio modem to DTE
PIN NAME I/O LEVEL EXPLANATION
1
RTS IN RS-232
Request To Send from DTE
2
CTS OUT RS-232
Clear To Send. This signal indicates
that the radio modem's serial
interface is ready to receive data
from DTE.
3
SGND
‐
-
Signal ground
4
RD OUT RS-232
Receive Data to DTE from the radio
modem
5
TD IN RS-232
Transmit Data from DTE to the radio
modem
6
MODE
(DATA/PROG)
IN
0-16V
<1VDC or connected to ground =
Programming Mode
>3VDC or Not connected = Data
Transfer Mode Note*
7
Not connected
8
Not connected
Normally the MODE line is NOT connected i.e. the radio modem is in Data Transfer Mode.
NOTE!
When installing the cables of the serial interface, it is recommended that the operating voltage of
all devices is powered OFF.