Hi and welcome to Scope Month! My name is
Daniel Bogdanoff and today is
Wednesday, March 29th and we're going to be giving
away another five 1000 X-Series
scopes and every day we've been doing
a scope tip. We had Erin come on last
week and show us how to make some gated
measurements. We're going to bring her
back on and she's going to show us how
to do some gated FFTs on a 3000T
Series oscilloscope.
We're going to take a look at how to make a
gated FFT measurement. So this is really
great when you're trying to look at the
frequency components of a specific
portion of your signal. So if we take a
look at the scope we can see I have an
FSK signal here with two different
frequencies hopping that's being driven
by this I squared C bus down here. So I
want to be able to zoom in on different
portions of this signal and see what the
frequency components of them are so to
do that we turn on our gated measurement
For that we press the magnifying key
here. Now we can see that longer time
span along the top and that zoomed in
portion on the bottom. We can see it's
also zooming in on that I squared C bus
Now we can turn on the FFT by pressing
the FFT button on the front panel and we
can see that performs the FFT over our
entire time span. We want the FFT to just
be performed within this zoomed in
portion along the bottom here so to
change that we go into the "more FFT"
button and select "FFT gating" and change
that to "gate by zoom." Now we can see the
FFT is only being performed within that
zoomed in portion along the bottom of
the screen and we can see the frequency
values of this signal. So we can see
right now we're looking at a 3.2
megahertz signal and then we can move
our gate by adjusting the horizontal
position knob and now we can see both of
the frequencies at the same time so we
can see this slower frequency here that's
at 390 kilohertz and we can see the
faster frequency that's at 3.2 mega
hertz. So we can see those are the
frequencies that we were expecting and
there are no unexpected frequency
components in the signal. This gated FFT
is really helpful when you're trying
to determine the frequency components of
specific points of your waveform.
FFTs are also especially useful for those of
you who are working with audio gear and
synthesizers and speaking of music, we
wanted to highlight another Test to
Impress entry with Ollie from Finland. So
let's take a look at that.
Hello fine people of Keysight! My name is Ollie.
Please take a journey with me
inside Finland's probably smallest
electronics lab then as you can see from
the picture the electronics lab is
situated in my closet. That's actually an
oscilloscope from work and I can use it
probably once every two weeks if I'm
counting correctly and that makes me
really sad.... since the competition is not
about who lives in in the world's
smallest electronics lab but more about
what you are gonna do with the new
oscilloscope I would like to introduce
you to my friend's korg dl 8000 R
series music delay. I'd be managed to
scope it- well every second week- but now
I would say the problem is way way way
deeper in the board and well I have to
see the signal to be able to fix this
delay. I'm not saying that with this
delay Finland will make better music
but well it will make me and my friend
very very happy. I want to be the guy who
goes to work and when people are gonna
ask "hey well who's gonna who's gonna
borrow the Rigol next time?" I want to be
the guy saying "hey dudes I ain't needing
your Rigol anymore. I'm gonna use my Keysight."
and they're gonna be like "hey what
what what what Keysight? what what Keyight?"
hey so two things- help me fix this
machine or this music making monster and
at the same time help Finland make
better music. If that is even possible in
any any way. Thanks a lot! And now let's
draw today's is 5 1000 X-Series scopes
winners. Today's winners are Sam Jones
Ben Schifman, Brandon Butterworth,
Vishal Pawar and one more Japanese name
I'm going to plug that into google
translate real quick. And our winner from
Japan is Ji Kitabayashi.
Congratulations to our winners. We will be
in touch with you in a few business
days. That's all for today. Make sure you
go check out this week's blog post. The
link for that is in the description. It
was written by Melissa who you've seen
earlier on this channel. And it's covering
protocol decoding on oscilloscopes.
Thanks for watching. Make sure you
subscribe to the Keysight oscilloscopes
youtube channel and check us out on
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you tomorrow!