DSA80000B Digital Signal Analyzer
2-GHz to 13-GHz Oscilloscope
Measurement Systems
Data Sheet
Design, debug and validate your
serial-data-based designs faster
With today’s higher data rates
and serial buses, you need
specialized tools to design, debug
and validate your designs. Your
measurements of low-voltage,
differential signals can be
impacted by oscilloscope noise,
trigger jitter, and probe fidelity.
Clock signals are typically
embedded in your data, and the
data may be 8b/10b encoded, so
debugging your signal requires a
smart oscilloscope. Once your
design is complete, you are faced
with compliance testing, which
means making many complicated
tests in a short amount of time. A
standard oscilloscope no longer
does the job.
The DSA80000B digital signal
analyzer (DSA) is an oscilloscope
measurement system optimized
for these measurement tasks.
The system is built around an
Infiniium DSO80000B Series
oscilloscope and the InfiniiMax
probing system. The oscilloscope
and probe capabilities are
augmented with high-speed serial
data analysis and EZJIT Plus jitter
analysis software to give you the
capabilities you need for designing,
debugging and validating
serial-data-based designs.
Key features:
• 2 to 13 GHz bandwidth
real-time with up to 40 GSa/s
sample rate
• Industry’s lowest noise floor,
jitter measurement floor,
trigger jitter, and flattest
frequency response
• Industry’s only full bandwidth
probe system for all use
models – up to 13 GHz
bandwidth for differential
solder-in, browser and SMA
connections
• Serial data analysis with clock
recovery, 8b/10b decode, and
symbol search/trigger
• Jitter analysis with random
jitter (RJ) and deterministic
jitter (DJ) decomposition
• Upgrade program allows you to
upgrade to a higher bandwidth
model, protecting your
investment
• LXI functional class C
compliant
2
The high-speed serial data
analysis software provides you
with a fast and easy way to
pinpoint signal integrity problems
and validate performance for
serial interface designs. It allows
you to perform mask testing,
characterize serial data streams
that employ embedded clocks,
and decode 8b/10b data from
serial data streams. The software
enables you to verify compliance
to computer, communication, and
data communications standards
such as PCI Express®, Serial ATA
(SATA), Serial attached SCSI
(SAS), Fibre Channel (FC), XAUI
and Gigabit Ethernet.
Figure 1. The serial data setup wizard quickly sets up a measurement by defining the signal, the
clock recovery method, and what you want displayed.
Key features:
• Measurement setup wizard for
ease-of-use
• Clock recovery first-order or
second-order PLL, external
reference clock
• Real-time eye diagram display
• Masks for PCI Express, SATA,
SAS, Fibre Channel, Gigabit
Ethernet and XAUI
• Eye mask unfolding
• 8b/10b decoding of serial data
• Symbol search and trigger
A serial data wizard walks you
quickly through the steps
required to setup and perform a
measurement. Intuitive displays
and clear labeling of information
make it easy to comprehend
measurement results.
Serial data analysis with clock recovery
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Flexible clock recovery
Embedded clocks can be
recovered via constant-frequency,
first-order phase-locked loop
(PLL), or second-order PLL
approaches. You can adjust the
center frequency and bandwidth,
and in the case of second-order
PLL, the damping factor. For
PCI Express, the clock recovery
algorithm specified by the
PCI-SIG® is provided. When you
choose PLL clock recovery, the
clock recovery algorithm requires
some time at the start of each
record to lock to the data. This
interval cannot be viewed or
analyzed. The serial data wizard
will indicate the required time
period for the clock recovery
algorithm to lock.
Figure 2. An eye mask test on a failing Serial ATA signal. The
information below the mask screen helps you determine the level
of confidence in meeting your desired bit error rate.
Figure 3. The 8b/10b decoded symbol information is displayed
below the appropriate portion of a PCI Express signal.
Real-time eye analysis
The real-time eye display is
reconstructed from all unit
intervals in the oscilloscope
memory aligned by the recovered
clock. In this display mode the
center screen (or zero in the time
base) corresponds to the active
edge of the recovered clock. Once
you identify a failure of the eye
mask, you can unfold the eye
diagram to show the specific unit
interval that caused the failure.
When you use it with the 8b/10b
decoding feature, you can identify
data-dependent errors that result
in eye mask violations caused by
inter-symbol interference (ISI).
Or use 8b/10b decode to assist
you with debugging during the
link bring-up phase of
development.
Serial data analysis with clock recovery (continued)
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With the faster edge speeds and
shrinking data valid windows in
today’s high-speed digital designs,
insight into the causes of signal
jitter is critical for ensuring the
reliability of your design. The
EZJIT Plus jitter analysis
software helps to identify and
quantify jitter components.
Time correlation of jitter to the
real-time signal makes it easy
o trace jitter components to
their sources.
Figure 4. The EZJIT Plus setup wizard prompts you to select measurement thresholds, parameters to display, and for RJ/DJ analysis,
the data pattern type, TJ BER calculation level, and clock recovery method.
Key features:
• Easy-to-use jitter
measurements
• Measure repetitive or arbitrary
data waveforms
• Constant frequency or PLL
clock recovery
• Real-time measurement trend,
histogram, and spectrum
displays
• Separation of RJ, DJ, PJ, DDJ,
ISI jitter subcomponents
• TJ estimation at low BER
• Graphical displays of DDJ
versus bit, histograms and
bathtub curve
The EZJIT Plus setup wizard
helps you quickly set up
the oscilloscope and begin
taking measurements. With
time-correlated jitter trend and
signal waveform displays, you
can clearly see the relationships
between jitter and signal
conditions. Intuitive displays and
clear information labeling make
it easy to comprehend
measurement results.
Jitter analysis with RJ/DJ decomposition
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Easily review jitter parameters
The 4-in-1 jitter display allows
for multiple views of jitter
populations and distributions,
data-dependent jitter versus bit
in repetitive patterns, as well as
the bathtub curve plot, which
measures eye-opening versus bit
error rate. Composite histogram
displays relative contributions of
data-dependent jitter, total jitter,
random jitter and periodic jitter.
Total jitter is a convolution of the
data-dependent jitter probability
density function (PDF) and the
random/periodic jitter PDF.
Figure 6. The EZJIT Plus 4-in-1 results display provides a
comprehensive view of the jitter components. You control which
parameter is displayed and where. Plus, you can quickly toggle
between the jitter analysis screen and the measured signal.
Figure 5. For debugging jitter problems, the histogram display
plots the relative occurrence of values for the measured
parameter, the trend display shows a time plot of the
measurement time-correlated with the signal waveform data,
and the spectrum display shows the spectral content of the jitter.
RJ/DJ results with confidence
With RJ/DJ separation required
by many standards today, you
need confidence that you’re
making accurate, repeatable jitter
measurements. The RJ/DJ jitter
separation in EZJIT Plus software
uses similar algorithms to those
used in Agilent’s 86100C DCA-J,
giving you confidence that your
measurement results are accurate
and repeatable across multiple
platforms. EZJIT Plus software
also allows you to choose between
periodic and arbitrary data
modes when you analyze jitter
for compliance.
Jitter analysis with RJ/DJ decomposition (continued)
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