Hello. My name is Dave Tenney. I’m a product manager with Agilent Technologies. I’m here
today to demonstrate new waveform creation software that operates with several of Agilent’s
function and arbitrary and pulse waveform generators. What I’m going to do today is to
create more complex waveform than we did in the introductory video that might be more
like some of the custom waveforms that you have for your own applications.
This is what BenchLink Waveform Builder Pro looks like when you first start it up. You
get a choice of creating a new waveform, a new sequence of waveforms, you can open an
existing waveform that you’ve created, or import a waveform from other software in a
CSV file format. So again, we’re going to create a new waveform. We’re using the 33522A
function arbitrary waveform generator. In this area now we can set up waveform properties.
I’ll just leave this default that’s 100 milliseconds with a sampling rate of one mega
sample per second and that will give us 100 kilo samples of data points to work with.
So I simply hit okay and now I get a scope like display where I can begin creating the
waveform.
So this time let’s create something that’s a little more complex that might be similar
to an application of yours. So I’m going to select this trapezoidal waveform creation
tool and so let’s suppose that you have a device and you’re trying to simulate a power
up ñ a dwell state in the power up and powering down maybe one or two times.
So let’s start with this trapezoid. So the first thing I can do with a trapezoid is to
say how many cycles so let’s say two cycles. Let’s run it for the entire 100 millisecond
display that we have. I can set the delay time before I start the power up. Let’s set
that at 10 milliseconds. I can change the hold time that we’re at full power on the
trapezoidal shape. We’ll set that to 30 percent, which is 15 milliseconds. I can also change
the rise time and the fall time. Let’s have the fall time to be a shorter period of time
than the rise time. Let’s say 2 1/2 milliseconds. So now I have the trapezoid at the shape that
models your power on and dwell condition and power off. Again I say okay and I have the
trapezoid on the screen.
So before we actually send this to the instrument and look at it on the oscilloscope, let’s
model a glitch in the dwell state of the power. So the way we’re going to do that is to just
highlight a few points and we’ll use an editing capability that you haven’t seen yet. It’s
the math functions. We’re going to subtract a DC value from the dwell voltage and let’s
have it drop to let’s say let’s have it drop one volt from where the dwell is here.
Now in the preview window, it’s just DC so it’s not going to be clear at this point
to see what this will look like. But we say okay.
Now you’ll see that this is a new window. It’s a waveform math window. So this is the
selected waveform. This is the operation which is DC. I say okay to that and now you can
see that I have a glitch of one volt drop that’s in the dwell time on my voltage. So
now I have another waveform that’s ready to send to the instrument. So I’ll go to
the Communications menu again. In the first video, I showed you how to connect to the
instrument. You find the instrument and then actually connect to it. In this case, we’ll
just send the data to the instrument and then take a look at it on the oscilloscope.
So I’ll say send the data. I have a default name Waveform1. I’ll just keep that. And
you can see that we have the one volt glitch dropout in the waveform on every other cycle
of the trapezoid.
Now we’re going to create another fairly common waveform, a multi-tone signal that’s
used in communications and audio applications for testing. I’ll begin by selecting the
waveform parameters again. Let’s just leave these settings that we previously had at one
millisecond duration and a one mega sample per second sampling rate.
Okay, so now we have a new clean screen to begin with. I’ll go to the advanced segments
area. This is the multi-tone segment creation tool. We’ll click on that. You can see that
there was already a two-tone signal that had been created in here at a fairly low frequency.
So we’re going to change this now to a multi-tone frequency and let’s put the center frequency
at 100 kilohertz and let’s create three tones in this case. Now here you can see I can go
to four or five or six, so it’s fairly flexible here. We’ll create three in this case. The
tone spacing we’ll leave at ten kilohertz.
You can see again now in the preview window, you get an idea what your signal will look
like and you also see that real time as I’m changing the number of tones. So now we’ve
got the signal that we’d like. We just hit the Okay button and now it’s displayed on
our screen. We will now go to the menu to send this to the instrument and have a look
at it on the instrument and the oscilloscope.
So we’re in the Communications menu again. This is Waveform No. 4. The software sequentially
names the waveforms as you create them. And again now when we hit the Send button, it
will go the instrument and then show up on the oscilloscope.
So we’ve just finished creating a couple of more complex waveform, a multi-cycled trapezoid
as well as a multi-toned signal. Hopefully these are familiar with some of your applications
and again, I thank you for watching.