AS 680/682
Description, Operation and Maintenance Technical System Control
ADS−B
4−3Ed. 10.07
4.2 TECHNICAL SYSTEM CONTROL (TSC)
4.2.1 General
The main functionality of the Technical System Control (TSC) is to monitor the Ground Station state
and to alarm a user in case of a malfunction. Additionally the TSC can be used
S to inspect and change all parameters of the Ground Station,
S to log the system state and any configuration changes to a file and a log window on screen,
S to allow rebooting the Ground Station remotely,
S to allow updating the Ground Station software remotely.
The basic TSC operating principle is to retrieve and update configuration and status information of
the Ground Station via the protocol SNMP (Simple Network Management Protocol).
SNMP is an asynchronous query/answer protocol based on the standard connectionless transport
protocol UDP/IP. The unit under control (Ground Station) must be equipped with a local SNMP agent
or daemon having access methods to the configuration and status parameters of interest. The con-
trolling entity is referred to as SNMP manager. Both, the agent and the manager have the same de-
scription of controlled parameters within a data structure called management information base (MIB).
Most network components and computer operating systems on the market are equipped with SNMP
agents and come with a specially adapted MIB. New components are made known to the SNMP man-
ager by including their MIBs.
The TSC includes an SNMP manager, but extends the standard MIB by a few useful add−on functions
based on a proprietary protocol.
The TSC can be started in different modes (user roles) depending on the user account that runs the
application (’Monitor User’ or ’Supervisor’). Setting up and configuring the TSC is described in sec-
tion 3.5.
The TSC monitors only one Ground Station but can switch to different Ground Stations easily. The
TSC has a list of Ground Stations which the TSC can switched to.
4.2.2 Starting the TSC
A file including a list of available Ground Stations has to be used as start−up parameter. On the RCMS
the TSC uses the same data file as the MTSC.
On the RCMS the TSC is started from the desktop panel, ’Misc. Tools’, ’Terminal’ with the command:
/usr/local/tsc/tsc −mtsc /usr/local/etc/data.xml
On the LCMS there is no MTSC installed. So the TSC will get the list of available Ground Stations using
a special Ground Station list file.
On the LCMS the TSC is started from the desktop panel, ’Misc. Tools’, ’Terminal’ with the command:
/usr/local/tsc/tsc −gsl /usr/local/etc/gs_list.conf
4.2.3 Operation of the TSC
The operation of the TSC in the Supervisor Mode is described in chapter 5, the TSC operation in
the Monitor User Mode is described in chapter 6 of this technical manual.
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