SpaceWire Physical Layer Tester
The SpaceWire Physical Layer Tester (SPLT) is a tool designed to test, validate and verify a SpaceWire system across all levels of the SpaceWire standard. Two SpaceWire ports employ a special LVDS interface which allows the transmitted signals to be deliberately and measurably manipulated to test the capability of a unit under test to receive signals of varying quality.
The SPLT SpaceWire drivers offer full, independent control of LVDS common-mode and amplitude for data and strobe pairs, and additional manipulation of skew and jitter characteristics can be introduced between data-strobe and in-pair.
To facilitate acquisition of an eye-diagram, the analogue LVDS signals received on these ports are buffered onto external connectors for easy interfacing to an oscilloscope.
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Physical Layer Test Ports: Two special LVDS interface SpaceWire ports facilitate the manipulation of the Physical Layer characteristics.
Skew: 0 ns to +/- 8 ns in steps of approximately 0.01 ns
Jitter: 0 ns to 1 ns in steps of approximately 0.01 ns (Experimental)
Swing: 0 V to 320 mV in steps of approximately 0.01 V
Common-mode voltage: 20 mV to 2.9 V in steps of approximately 0.01 V
Slew: 8 steps of slew available to select for the LVDS outputs (Experimental)
In built calibration: The SPLT includes calibration software to simplify user calibration of the unit prior to testing
Buffering of signals received at Physical Layer Test Ports: The LVDS + and LVDS – signals from the data and strobe signals of each physical layer test port are buffered onto SMA connectors for direct connection to an oscilloscope providing close representation of the signals at the receiver inputs.
- Part Number
220 x 115 x 30 mm (approx., excluding feet)
+5V DC, 6A power brick supplied
- SpaceWire Ports
Compliant to SpaceWire Standard ECSS-E-ST-50-12C (formerly ECSS-E50-12A) and provides support for RMAP (ECSS-E-ST-50-52C)
Number of SpaceWire Ports: 4
Maximum Speed: 200 Mbits/s
Connectors: 9-pin micro-miniature D-type
- Exposed Oscilloscope Physical Layer Test Port inputs
SMA 50 Ohm connectors:8
- Port 1 SpaceWire Data and Strobe LVDS + and LVDS –
- Port 2 SpaceWire Data and Strobe LVDS + and LVDS –
- Trigger input and output
SMB connectors with +3.3V signal level and 5V tolerances
- USB Port
USB 2.0 (480 Mbits/s)