Snap-On Vantage Legend, Руководство пользователя

Страница: 45 / 86

Scope / Multimeter Capturing Data
37
Figure 3-39
shows an example at 16X of the same waveform shown in
Figure 3-38
.
In
Figure 3-39
at 16X, the glitch is easily seen as compared to higher magnification
levels.
Figure 3-39
Zoom Example
While monitoring a MAF (Mass Air Flow Sensor) signal, the waveform displays
normally. As the signal is being monitored, an erratic “condition” suddenly develops,
then goes away, but may have not been observed on the screen. Pausing the data
capture (when such an event occurs) allows you to analyze the waveform using a
higher zoom level (wider view) to look for a glitch in the signal.
The following
three illustrations show a generic square waveform to illustrate this
method.
1 - Monitoring / Capturing waveform as it displays normally (
Figure 3-40
). You may
not see a glitch, while monitoring at this setting.
Figure 3-40
2 - Pause data capture and then zoom out (this example is at 256X) to see more
data and to possibly find a glitch (
Figure 3-41
). In this example the cursor has been
placed on the right side of a glitch. The waveform is too compressed to see any
detail, however the glitch stands out as a thin light area in the waveform.
Figure 3-41
3 - Zoom back in (this example is at 8X) to view more detail (
Figure 3-42
) in the area
where the cursor was placed by the glitch.
Figure 3-42