Hello, my name is Brian Castello. I am an application intern at Agilent Technologies.
Today, I am going to show you how easy it is to use Signal Studio for Pulse Building
to create real-world radar pulse patterns. In this demonstration, we will be using the
PSG signal generator to generate our signal. We will be using the arbitrary waveform generator
to increase the amount of pulses we can produce and the PXA signal analyzer to analyze and
display our wave form. We will use a laptop with Signal Studio for Pulse Building to generate
an ASR-11 airport surveillance radar pulse pattern, as well as Agilent’s
pulse measurement software. Now for a closer look at Signal Studio for Pulse Building. We will build the
pulse pattern using the ASR-11 FAA characteristics found on-line. These parameters include pulse
width, frequency, power, and antenna characteristics. I will input those into Signal Studio for
Pulse Building to generate our real-world signal. In Signal Studio we will change the
pulse width to 1 ms. We will change the center frequency to 2.7 GHz.
Click “Add new pattern item,” to add a pulse to the pattern detail window and then
change the PRI or the repetition interval to 100 ms, we will change the antenna pattern
type to circular, we will change the scan rate to 12.5 rpm’s, and we will change the
3 dBM beam width characteristics accordingly. Next, we are going to click the repeat for
full scan which will allow us to get the entire pattern in our pulse signal. Then simply press,
“download” and play. Once the signal has downloaded we will check out the entire pulse
pattern using the spectrum analyzer. To do this we need to change it
from frequency to time. The first thing we are going to do is set
the center frequency to 2.7 GHz. Next we are going to change it from frequency to time,
now change the span to zero span, and now change the sweep time which will give us a
full view of the signal. We will change it to 5 seconds which should give us the entire
pulse train. Set the detector to peak, so we just see clean peaks. Change the bandwidth
to 3 MHz and then change the trigger so we are getting the beginning of the signal to
External 1. Once it loads up we should see the entire pulse pattern. And you will notice
in the display that you see two peaks; one at the very beginning and one right here.
Those are both the same peak. What they are supposed to emulate are radar objects detecting
as the radar is going around its scan. Now we will take a closer look with pulse measurement
on my laptop. This is our pulse measurement software and analysis tool that automatically
detects and allows for quick measurement of basic functions of a pulse like pulse width,
PRI, power, but it also allows for more advanced features to analyze phase and frequency. Also,
if you want to analyze a trend of your signal you can use the extended analysis tool which
will give you a continuous look at your signal. To check our antenna pattern we will click
“set frequency.” Set frequency to 2.7 GHz, as we have in the past, click “OK,”
and to increase the amount of time that we are getting, amount of pulses we are getting,
we will decrease our time resolution to about 90 ns which will give us 46, 47 ms of scan
time. So you notice the round nature of these pulses. This is because this is a horizontal
rotation of the antenna as it is searching for the object of interest. You will notice
the peak here is where it hits the object but does not quite get the whole object. Right
here is the whole object. Now we will add some analysis tools. For basic ones, we will
do width and PRI, click “OK,” Then we will also do some frequency ones. We are going
to do bandwidth as a signal, we are going to do start and stop frequency as well as
the pulse-to-pulse phase of our signal. You will notice those displayed below here. So
today, I showed you how easy it is to generate a real-world pulse pattern using Signal Studio
for Pulse Building. We downloaded that signal to our signal generator, we analyzed that
signal and displayed it using the PXA, and we did further analysis using the pulse measurement
software. To get a demo for yourself, please contact your Agilent representative. For more
information visit agilent.com/find/Pulse_Building. Thank you for watching.