Hi my name is Daniel Bogdanoff with Keysight Technologies. Today is March 23rd, so we're
giving away another MSOX3104T. Johnnie Hancock is at APEC, so if you're at APEC, go see him.
We prerecorded last week a talk with Johnnie that we could use today, it's about triggering.
Just a quick caveat, I know the camera's a little out of focus for that talk with Johnnie,
so that's just a really good object lesson in just because you have the right equipment
doesn't mean that you're necessarily using it the right way.
So that's why we're doing these scope tips, to make sure that you guys boh have good equipment
and know how to use it.
Johnnie's an all-around good guy. Johnnie, why don't you come on up.
Just wanted to make sure I didn't come across too short. OK, sounds good.
Now we're eye to eye. Alright.
OK, I'd like to encourage you guys to read the latest blog, the URL is right down here.
It's called something like, "When is Normal, Not so Normal?" Basically what it's about
is the auto trigger mode and the normal trigger mode. So I'm going to give a short demonstration,
but, why the heck do they call it "normal"? It is not the normallyl use trigger mode,
auto is the default trigger mode which means automatic trigger. So, let's take a look at a demonstration.
OK, let's take a look at an application for auto trigger. So let's assume you walk up
to the scope, someone else has probably left it in some strange mode. You input your signal,
and you see nothing on the scope's display.
The problem, in this case, is that it was left in the normal trigger mode. So let's
change that to the auto trigger mode.
There! Now we can see our signal. Now if the scope is not set up properly, but at least
I can see the signal. Looks like I probably need to expand the verticals a bit, change
the offset. But it's still not triggering. What's happening now is that it is auto triggering,
or automatically triggering. The trigger level is set above the waveform. The quickest way
to properly set the trigger level is just press the trigger level knob, it will find
a 50% point. Now we can continue making measurements. Now if you change the trigger level, we move
it up here above the waveform, it starts auto triggering again; move it below, it starts
auto triggering. So with auto trigger, even if you're not triggered, at least you can
see where your waveform is so you can then begin getting to a better setup.
Now let's look at an application for the normal trigger mode. So there I've recalled another
signal. Now let's input our waveform, and what we see on screen is these narrow pulses
popping up. And the scope's trigger level, if I move it here, you can see it's set right about
in the middle. So why isn't it triggering? The reason it's not triggering is because
it's auto triggering. This pulse has an extremely low duty cycle. The repetition rate in this
case is only a couple hertz. So I need to change to the normal trigger mode, and there
you can see it locks on to the waveform. But if I move the trigger level above the waveform,
press clear display, again, I see nothing. So I connect the signal back up, still see
nothing until I lower the trigger level back into the range.
So there are specific applications for using auto as well as for using normal.
And remember, that blog link is below. So Johnnie, how long have you been with HP, Agilent,
and Keysight?
About 36 and a half years, I started in R&D as an analog hardware designer, back when
these things used to have an analog sweep. So I'd also like to mention, Semper Fi to
all the jarheads out there, and also, concerning the blog, if you want to know why normal is called
normal when it's not really normal. See my thoughts in the blog.
Sounds good, thanks Johnnie.
So let's go ahead and draw today's winner. Today's winner of a brand new MSOX3104T is-
that's a Chinese name, let me pull in my Chinese-speaking backup, and they're going to pronounce it for us.
Alright I stand corrected, the winner today is actually Japanese. We don't have any Japanese
speakers in today, they're actually on business trips. So, we plugged it into Google translate,
bear with me. The winner of today's scope is: 直樹 初田. Congratulations 直樹 ,we will be in contact with you.
One more quick thing before we go: we have an internship available here in Colorado Springs.
If you want to come work with us in beautiful Colorado, work with the coolest scopes on
the planet, check it out, the link will be below.
Before you go, remember, we're livestreaming the last 4000X-Series giveaway on Friday.
You can still enter for the Test to Impress Contest, win a fully loaded 6 GHz 6000X-Series
oscilloscope. Also, check out the Learning Center and of course the blog that we talked
with Johnnie about today. We probably have three or four or five blog entries out there
now, we're going to continue updating that. Like us on Facebook, Subscribe to our YouTube
channel, we're still getting more views than we have subscribers, so that means you probably
haven't subscribed yet so subscribe. And share Scope Month with your friends, hit the Share button below.
Thanks for watching. Also I found out my dad watches these daily, hi dad. I'll see you guys tomorrow.