In this short video, I will show how to use the InfiniiScan Zone trigger
on Keysight's InfiniiVision 4000 X-Series oscilloscope
to trigger on various problem type signals.
In addition, I will show how it can be used to trigger on a serial bus
isolated 1 b. Let's get started.
Here we show a rising edge of a digital signal
which usually has a nice clean rise time but sometimes it exhibits an infrequent
non-monotonic edge which means that it randomly reverses direction or momentarily stalls.
With the scope's extremely fast wave form update rate
of up to one-million waveforms per second,
we can clearly see this occasional waveform anomaly.
Let's now use this scope's InfiniiScan Zone trigger
to uniquely display just the non-monotonic edge.
Using the touchscreen we can simply drow a box in the region
of the anomaly and then select must intersect.
Now the scope displays only waveforms that intersect the zone.
If we change this zone
to a must not intersect zone, then the scope will display
just waveforms with normal rising edges.
We can also side our zone box around.
Here I show the zone box repositioned again
to show just the non-monotonic edges.
Let's now take a look at another example of a problem type signal.
Here we show a digital signal that exhibits random metastability.
When the signal is high it sometimes begins to reverse polarity
but then returns back to the high-level. Again, let's draw a zone box in the area of metastability
and select must intersect to uniquely display occurrences of the waveform
only when the anomaly happens.
Although I could have use one of the scopes advanced violation trigger modes,
such as rise time or pulse width trigger, to capture these problem signals
InfiniiScan Zone trigger is quicker and much easier.
Basically if the scope's one-million waveforms per second update rate
reveals an intermittent signal problem, then zones hardware-based qualification rate
of 200,000 waveforms per second can uniquely catch it
and without the hassle of setting up a complex trigger condition.
Let's now take a look at another example of using InfiniiScan Zone trigger
to solve a difficult problem.
This time, we will use zone to display an isolated one pulse of a serial bus signal.
Here we show a flex ray serial bus signal.
The scope is currently triggering on any rising edge
of the signal. Sometimes engineers need to isolate a 1-bit wide pulse
based on a specified number of preceding
and following zeros and then characterize the pulse
in isolation, which is commonly called an isolated one measurement.
Let's first set up a must not intersect zone
that we'll define three preceding zeros
and now we'll define a second
must not intersect zone that will define two trailing zeros.
Note that it would be just as easy to isolate a zero bit
by first setting up the scope to trigger on falling edges.
As you've seen in this short video
Keysight's InfiniiScan Zone trigger is not only a powerful tool that allows you
to isolate measurements on specific signal shapes
but it is also easy-to-use measurement tool.
To learn more about Keysight's new InfiniiVision X-Series oscilloscopes
contact your local Keysight distributor and ask for a demonstration.
Thank you.