Hi my name is Min-Jie Chong from Keysight Technologies. I am the product manager for the Infinium line of oscilloscopes.
Today I'm going to show you some signal integrity performance of the scope.
Signal integrity is really important for your measurement to provide you with the
highest measurement accuracy to create technology breakthrough. Signal integrity is
very important for your digital validation as well as for your optical
coherent modulation research as well. There are three different demos that we would
like to show you today that can show you the signal integrity performance of the scope.
First is the magnitude and phase response flatness of the scope. Second, we're going to
show you the ENOB performance of the scope. And third we're going to show you how you can
achieve four channels up to 63 GHz by combining two scopes together and how
we can synchronize the scope very tightly, so we are talking about very low interscope jitter between the scopes.
So first, we're going to show you the magnitude and
phase response of the Z series oscilloscope up to 63 GHz.
We have a step generator that is generating a 5 ps step into the 63 GHz channel
of the oscilloscope. So as you can see on the screen
we have a fast response which we then differentiate to generate the impulse
response in the green color waveform and then we will perform the FFT magnitude
and phase measurements as you can see on the blue and the purple waveform.
This step generator is calibrated towards than this for traceability and we have
characterized the error of the step response as well so when we subtract and
correct the phase and the magnitude of the scope this is the plot that we get
and you can see how flat the magnitude and phase of the oscilloscope is.
So we're talking about a magnitude of plus minus one dB up to 63 GHz, and also a phase error
less than plus minus 10 degrees of error.
In the second demo, what I want to show you the ENOB performance of the oscilloscope. According to the IEEE, the way you
measure and analyze ENOB is by injecting a pure sine wave into the input signal
channel of the oscilloscope using a sine wave generator. And then the error that the scope measure of
the sinewave is then the ENOB of the scope. So the more error that the scope
measures, the less ENOB the scope is going to have. So what I have done is I have
sweep the frequency of the sinewave generator so that I can capture the
different frequency data point of the ENOB for the oscilloscope and then I
feed all the wave forms into the script for me to generate the plot that you can
see over here. So I have characterized the different data points up to 60 GHz
and you can see that the ENOB of the scope is at about four bits,
four effective bits. This is probably the best you can find in the industry
force bandwidth up to 63 GHz.
So some of the competitors that we have has about 0.5 dB lower, and that can affect the accuracy of your
error of magnitude measurement for your optical coherent modulation research.
In the third and final demo, what I want to show you is the multi scope application
Multiscope is needed when you need a higher channel count of more than four
channels so in this case you know we have two Z-Series oscilloscopes that we
combined to achieve four channels at 63 GHz. And of course the multiscope allows
you to combine up to 10 oscilloscopes so you can really get to 20 channels of 63 GHz.
When you are combining the scope, one of the important characteristics is how tightly you can
couple the scope because the jitter and the skew between the scope can affect your
measurements and your DVM so what I want to show you here is how we can effectively
calibrate out the jitter of and skew of the different oscilloscopes. So we have done the
calibration that will track the jitter and also the temperature drift of the
scope and the way we can prove it is using a sine wave generator we split the
signal coming up in the sine wave generator into the channel one and
channel one of the two oscilloscopes. So let's look into the stream of the scope
software over here, and you can see that right now we are tracking the jitter and
also the drift correction so the frame's are
tightly synchronized right now.
The next thing is what we are doing is we actually injecting a sinewave a
scene and split it into two paths. What we do is we actually intentionally
skew the wave form a little bit and then we measured a jitter of the second waveform,
second channel relatively to the first scope and you can see over
here the standard deviation of the jitter is 146 fs.
That is how accurately we can tie the scopes together to provide you with the
most accurate measurements when you need more than two high bandwidth channels.
We have shown you three demonstrations earlier, the first is the magnitude and phase response
of the oscilloscope and you can see how flat the magnitude and phase
of the oscilloscope can be. Secondly we show you the ENOB performance of the
oscilloscope. We measured four effective bits up to 63 GHz and that is probably
The best you can find in the industry.
The third is the multiscope applications so we are combining two scopes together
as if they are coming from the same scope so you can observe that we can measure
less than 150 tons fs of interscope jitter between the scopes.
Signal integrity is really important and is the key focus of Keysight because we understand that you
need the performance for you to create technology breakthrough and to make the
highest measurement accuracy for your product design.
If you need more information or if you need a live demo of the scopes, please do not hesitate to contact us.
Thank you for watching the video today.