About X-431 Station
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User's Guide
4.3 Oscilloscope (Optional)
4.3.1 Introduction
The Scopebox is an optional add-on module of X-431 Station, including automotive oscilloscope and
automotive ignition waveform.
Automotive oscilloscope can make the auto repair technician quickly judge the faults on automotive
electronic equipment and wiring, and the oscilloscope sweep speed is far greater than the signal frequency
of such vehicles, usually 5-10 times of the measured signal. The automotive oscilloscope not only can
quickly acquire the circuit signal, but also can slowly display the waveform to observe and analyze. It can
also record and store the tested signal waveform which can be recalled to observe for the fast signal,
having great convenience to failure analysis. Either high-speed signal (e.g.: Injection nozzle, intermittent
fault signal) or the slow-speed signal (e.g. the throttle position change and the oxygen sensor signal) can be
observed through automotive oscilloscope in an appropriate waveform.
The electronic signal can be compared and judged via measuring five parameters indexes. The five
parameters are the amplitude (the maximum voltage of signal), the frequency (the cycle time of signal),
the shape (the appearance of signal), the pulse width (the duty cycle or the time range of signal), and the
array (the repetition characteristic of signal), which can be tested, displayed, saved by the automotive
oscilloscope. Via the waveform analysis can further detect the circuit fault on sensors, actuators, circuits,
and electronic control units, etc.
4.3.2 Controls & Accessories
Scopebox Front View
Below describes the ports and indicators for the Scopebox.
No. Name Descriptions
1 Fixed signal generator Generate a square signal with xed 1K frequency.
2 CH1 Channel 1
3 CH3 Channel 2
4 CH3 Channel 3
5 CH4 Channel 4
6 External trigger
External trigger signal
(*It only applies if the Scopebox failed to
trigger the signal itself.)
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