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1 Introduction
The 4Links Diagnostic SpaceWire Interface (DSI) is a rack-mounted transparent interface that allows SpaceWire
packets to be sent and received over Ethernet via a TCP/IP socket connection. It provides remote access to a
SpaceWire network for software simulation of devices, remote monitoring and distributed system integration
activities. In addition, it provides for the detailed analysis of SpaceWire components, including routing switches.
Each packet received may be time-tagged to a resolution better than 2ns. There is no limit to the length of the
SpaceWire packets that can be transferred. Abnormal data ("errors") may be injected and monitored. The low-
level SpaceWire link start-up and operating behaviour may be modified for diagnostic purposes. Concurrent
outputs on several links may be synchronized. Waveform captures of the SpaceWire link signals may be triggered
by a very wide set of events.
The Ethernet port provides a galvanically isolated connection with a cable length of up to 100m. Attaching this to
the Internet allows world-scale connections.
Ethernet and TCP/IP provide a standard interface mechanism that is supported by all major operating systems, so
no additional software drivers are required.
The basic DSI-RG408 unit provides data transfers and may be extended with options to provide for time codes,
event reporting, waveform capture and time-tags. Most options can be added as a simple field upgrade by
replacing the removable memory card on the front panel of the unit.
This equipment is available with two, four or eight active ports which may be mounted on the front panel (see the
picture above) or on the rear panel.
1.1 Product Features
SpaceWire Link rate (Mbps)
Number of SpaceWire ports
1.2 Product Options
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