Disturbance Node - TTTech Computertechnik AG

TTX Disturbance Node
Reproducible Failure Injection for FlexRay
TTX Disturbance Node makes it possible to
recognize weaknesses in system reliability
through specific failure injection. The device
allows developers and test engineers to
analyze the robustness of the FlexRay TM
network, the effects of network disturbances
on the behaviour of the system, and the error
tolerance of systems.
Failure Injection into the Global Network
TTX Disturbance Node enables failure injection into
the global network, or, by optionally splitting the
network, allows failure injection into subnetworks,
as required. Errors can be configured to be
synchronous or asynchronous to the FlexRay
schedule. The XML-based definition of test
cases makes it possible to inject complex and
reproducible errors.
The device encompasses an extensive number of
error classes, and is therefore suited for testing the
physical communication layer and for validating the
communication software as well as the network
layer. The device can be used to effectively test
the stability and the behavior of the physical
FlexRay configuration under extreme conditions.
KEY FEATURES/BENEFITS
Synchronous and asynchronous
disturbances
Global and local disturbances
Disturbances on channel A and/or
channel B
Configurable, triggerable disturbances
(incl. 60 test cases)
Termination resistor and short-circuit tests
Sending of disturbed frames
Can be automated
Innovative Features
TTX Disturbance Node offers numerous trigger
options and makes it possible to change the
temporal behavior of the FlexRay network, as well
as to generate valid and invalid frames.
Configuration: Graphical User Interface
TTX Disturbance Node comes with TTX Disturb,
A PC-based software with a graphical user
interface for configuration and control of the
device. TTX Disturbance Node supports import of
configuration requirements from a FIBEX file and
manual configuration of FlexRay parameters.
In addition to downloading of specific test cases,
TTX Disturb allows management of several test
case files. The tool can operate in batch mode for
test automation.

Hardware
Examination of the behavior of the application
in the presence of disturbances
TTX Disturbance Node is invisible to the network
unless activated
Analysis of disturbance effects on signal shape
(using oscilloscope)
Support of several bit rates
(2.5, 5 and 10 Mbit/s)
Interfaces
FlexRay interface based on the FlexRay
communication controller Freescale MFR4310
User-configurable disturbances on one or both
FlexRay channels
RS232 interface for loading the configuration
data and the fault scenario – conversion to
USB possible
BNC socket for trigger input and trigger output
and power supply
Real-time connection to any oscilloscope via
external trigger line for parallel physical and
protocol analysis
Fig.1: TTX Disturb
TTTech Automotive Contact Information
Europe, Austria - Headquarters
Tel.: +43 1 585 65 38-5000
E-mail: products@tttech-automotive.com
Germany
Tel.: +49 8458 39 7603-0
E-mail: products@tttech-automotive.com
Trigger Conditions
Triggers for external hardware (oscilloscope,
signal generator, HF burst generator) to disturb
arbitrary or specific transmissions with any kind
of custom signal or burst
Selectable disturbance triggers:
Synchronized to FlexRay
External trigger input
Asynchronous/strictly periodic
Pseudo-random (reproducible)
Trigger on wake-up pattern, start-up, bus idle,
POC state, and bit pattern, events
Configurable Disturbances
Cable splitting: Splitting of the cable into two
groups in order to simulate the impact of double
wire breakage
Strong driver switches the signal level
to “high” or “low”
Frame manipulation of TSS, FSS, FES, BSS
and DTS patterns
Suppression or delay of frames
Modification of individual frame bits with
optional recalculation of header and frame CRC
Bus separation mode to disturb the start-up and
time properties (e.g., delay of start-up frames)
Specifications
Dimensions: 172 x 172 x 55 (in mm)
Weight: 924 g
Operating temperature: 10 °C to + 50 °C
Storage temperature: -40 °C to + 85 °C
Power requirements: input voltage 9 to 60 V DC
at max. 15 W and max. 2 A
Order
Number
H38.002: TTX-Disturbance Node DN612
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www.tttech-automotive.com
Asia, Japan
Tel.: +81 45 470 1867
E-mail: products@tttech-automotive.com