PAGE 6-1
Inmarsat B
9905
6
SERVICE INTERFACE
The service interface is a useful software tool for both installation and servicing. It provides the technician
with detailed information about the system.
The service interface is intended for use with a personal computer running a terminal emulation program
like PROCOMM. The connections between the service PC and the transceiver unit and the settings of
the terminal program are all described below:
Connections
The electrical interface is compatible with RS232C. In order to protect it against
ground loops, it is isolated by opto-couplers, which makes it ideal for incidental
connections.
Only 3 wires need to be connected between the terminal and the transceiver unit,
labelled as follows:
Service RX: Data from PC to transceiver unit
Service TX: Data from transceiver unit to PC
Serial GND: Common
These signals are found in connector X34 (PC/printer port at the rear panel of the
transceiver unit).
The following table shows the connections to be made to a PC COM port with either
a 9- or 25-pin D-SUB connector.
Signal
X34
PC, 9-pin SUB-D
PC, 25-pin SUB-D
Service RX
13
3
2
Service TX
14
2
3
Serial GND
15
5
7
Settings
Although the terms may differ for different terminals, the PC or terminal emulation
program must be set up using the following parameters:
Baud rate:
9600 bps
Parity:
Odd
Data bits:
7
Stop bits:
1
Mode:
Full duplex
Local echo:
Off
Hand shake:
XON/XOFF (software)
DTR/DSR:
Off
RTS/CTS:
Off
Translation:
OFF
Emulation:
ASCII, TTY, VT52, VT100 or VT220
Before the actual description, each command has a syntax description. This is a single line for each
variant of the command. Optional parts are shown in square brackets like this:
POS[ITION]
which means that the position command may be typed as either
POS
or
POSITION
. When a choice of
completely different words are available, the vertical bar
|
is used like this:
NORTH|SOUTH
which means that the parameter is either
NORTH
or
SOUTH
. Parameters with a lot of different values
are shown as the type of the parameter in lower case like this:
Summary of Contents for Inmarsat B
Page 1: ...SAILOR Inmarsat B Workshop Manual W4400GB0 ...
Page 2: ...Inmarsat B Workshop Manual 9905 ...
Page 7: ...CONTENTS 1 INTRODUCTION 1 1 1 1 SYSTEM COMPONENTS 1 2 1 2 TECHNICAL DATA 1 2 9849 Inmarsat B ...
Page 46: ...4 ACCESSORIES Inmarsat B PAGE 4 3 Inmarsat B 9849 Diagram Veritas connection box ...
Page 124: ...CONTENTS 8 PERFORMANCE CHECK AFTER REPAIR 8 1 8 1 START UP SEQUENCE 8 1 9936 Inmarsat B ...
Page 127: ...CONTENTS 9 SERVICE 9 1 9 1 CHECK OF OCXO 9 1 9936 Inmarsat B ...
Page 129: ...CONTENTS 10 PARTS LISTS 10 1 9901 Inmarsat B ...
Page 133: ...CONTENTS 11 ABBREVIATIONS 11 1 Inmarsat B 9849 ...
