Agilent 54831B Data Sheet - Recovery Software

The Agilent Technologies High­Speed Serial Data Analysis (SDA)
software provides you with a fast
and easy way to pinpoint signal
integrity problems and validate
performance for serial interface
designs. The High-Speed SDA
software, when used with the
Agilent 8000, 54830, 54850, 80000
and 90000 Series Infiniium real­time oscilloscopes, allows you
to perform mask testing, char­acterize serial data streams that
employ embedded clocks, and
decode 8b/10b data from serial
data streams (54850, 80000 and
90000 Series only). The
High-Speed SDA software enables
engineers to verify compliance to
computer, communication, and
data communications standards
such as PCI Express, Serial ATA,
Serial Attached SCSI (SAS),
Fibre Channel, XAUI and Gigabit
Ethernet.

The High-Speed SDA software
and the 8000, 54830, 54850,
80000 or 90000 Series Infiniium
oscilloscopes offer several fea­tures to simplify the validation of
serial interface designs:

Agilent Technologies E2688A, N5384A
High-Speed Serial Data Analysis and

Clock Recovery Software for Infiniium
Oscilloscopes

Data Sheet

54830 and 54850, 80000 and
Feature Supported 8000 Series 90000 Series

Measurement setup wizard for ease-of-use X X
Clock recovery and serial data analysis for X X

high-speed serial data signals
Masks for PCI Express, Serial ATA, SAS, X

Fibre Channel, Gigabit Ethernet and XAUI
Real-time eye diagram display X X
Eye mask unfolding X X
Time interval error (TIE) jitter measurement X X
First-order or second-order PLL clock recovery X X
Clock recovery based on an external reference X X

clock input
PCI Express clock recovery using the official X

PCI-SIG sponsored DLL
8b/10b decoding of serial data X

Symbol search and trigger X

Easy measurement setup

The High-Speed SDA software
extends the ease-of-use advan­tages of Agilent’s Infiniium oscil­loscopes to the analysis of serial
data. A 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.

Select signal source

Select clock recovery algorithm

Figure 1. To set up a measurement, the wizard asks you to identify the signal
source and select the clock recovery algorithm.

Enter nominal data rate

Enter loop bandwidth

Figure 2. Next, the setup wizard asks you to enter a nominal data rate
and a loop bandwidth.

2

Mask testing

When used with the Agilent
54850, 80000 or 90000 Series
Infiniium oscilloscopes, masks
are provided for the following
standards:

• PCI Express (2.5 and 5 GSa/s)

• Fibre Channel Electrical
(1.0625, 2.125 and 4.25 Gb/s)

• Serial ATA

• Serial Attached SCSI (SAS)

• XAUI

When performing a mask test,
the High-Speed SDA software
indicates the number of wave­forms (acquisitions) tested, the
number of failed waveforms, the
number of unit intervals tested,
and the number of failed unit
intervals. This information helps
determine your level of confi­dence in meeting a given target
bit error ratio.

Number of failed UIs and total number
of UIs tested are indicated

Figure 3. An example of a 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.

3

Real-time eye display with
Mask unfolding

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.

With the High-Speed SDA soft­ware, 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 used with the
8b/10b decoding feature you can
identify data dependent errors
that result in eye mask viola­tions caused by Inter-Symbol
Interference (ISI).

Figure 4. A real-time eye display is reconstructed from all unit intervals in the
memory aligned by a recovered clock.

8b/10b decoding

When used with the Agilent
54850, 80000 or 90000 Series
oscilloscope, you can perform
8b/10b decoding via a patented
(patent pending) technique to
capture and display serial data
synchronized with the analog
view of a serial data stream. Now
you can use your oscilloscope to
assist you with debugging during
the link bring-up phase of devel­opment. In addition you can use
the 8b/10b decode feature to help
solve disparity error problems or
bit error rate performance prob­lems resulting from ISI.

Figure 5. The 8b/10b decoded symbol information below the appropriate por­tion of a PCI Express signal.

4

Serial data trigger and search

Combined with the 8b/10b data
decode function and an Agilent
54850, 80000 or 90000 Series
oscilloscope, you can also setup
a powerful software trigger that
continuously scans for the occur­rence of up to 4 consecutive
symbols. You can setup the trig­ger based on symbols specific to
a given standard, invalid codes
or hex values. This allows you to
solve data dependent problems
fast by using your oscilloscope to
monitor serial traffic and capture
error conditions. Unlike any other
tool, you can now combine logical
errors with the analog signal view
of the serial data stream at the
time of the error occurrence.

Figure 6. Configuring a serial data trigger on a PCI Express signal.

The first-order PLL
selection emulates
a first-order PLL

You enter the nominal
data rate and loop
bandwidth for the clock
recovery PLL

Figure 7.First-order PLL selections.

Flexible clock recovery

You can choose constant-fre­quency, first-order phase-locked
loop (PLL), or second-order PLL
clock recovery. 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

Figure 8. Second-order PLL selections.

algorithm specified by the PCI­SIG is provided for use with an
Agilent 54850, 80000 or 90000
Series Infiniium oscilloscope. A
specific clock recovery algorithm
is also available for Fibre Channel
measurements. When you choose
PLL clock recovery, the clock

When you select
second-order PLL,
you can enter a
damping factor in
addition to nominal
data rate and loop
bandwidth

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.

5

Clock display mode

You can view the data signal
superimposed with the recovered
clock. This provides a display of
the measured data relative to the
active edge of the recovered clock.

External Clock

You can choose to use an external
clock as your clock reference by
applying the signal to any of the
oscilloscope channels. This allows
you to provide your own explicit
clock that can be then used for
jitter analysis and to generate eye
diagrams.

Deep memory for deeper insight

The optional 1 Gpts memory in
the Agilent 90000 Series, 1 Mpts
memory (32 Mpts at sample
rates of 2 GSa/s or slower) in the
Agilent 54850 Series or 2 Mpts
memory (64 Mpts at sample rates
of 4 GSa/s or slower) in the 80000
Series oscilloscopes is particular­ly valuable for analysis of serial
data. For example, at a sampling
rate of 20-GSa/s and an incom­ing data rate of 2.5-Gb/s, 1Mpts
memory allows you to capture
an entire 216-1 pseudorandom
bit sequence (PRBS) on each
acquisition. In the Agilent 8000
and 54830 Series oscilloscopes,
the optional 128 Mpts memory
is valuable for capturing longer
sequences of serial data for analy­sis at the maximum 4-GSa/s sam-

pling rate.

In the acquisition step, the
serial data wizard indicates
how much time is required
for the clock recovery PLL
to lock

Figure 9. The serial data wizard indicates how much time is required for the clock
recovery PLL to lock to the data.

Figure 10. The display shows a data signal superimposed with a recovered clock.

6

Oscilloscope compatibility

For oscilloscopes with earlier
software revisions, free upgrade
software is available at http://

www.agilent.com/find/
infiniium_software

For Agilent 54830 Series
oscilloscopes with operating
software revision A.02.30 or
earlier, order the N5383A
Infiniium Performance Upgrade
Kit to obtain revision A.03.50
or higher.

Oscilloscope Operating Systen Software Revision

8000 Series Windows XP Pro A.04.90 or higher

80000B Series Windows XP Pro A.04.91 or higher

54830 and 54850 Series Windows XP Pro A.03.50 or higher

80000A Series Windows XP Pro A.04.90 or higher

Bandwidth of

Recommended recommended
Data rate Example oscilloscope oscilloscope

333 Mb/s DDR DSO8064A 600 MHz
MSO8064A

533 Mb/s DDR MSO8104A 1 GHz
1 Gb/s, Gigabit Ethernet DSO80204B 2 GHz

1.063 Gb/s Fibre Channel 1063 DSO80304B 2.5 GHz
RapidIO

1.5 Gb/s Serial ATA DSO80404B 4 GHz
Serial Attached SCSI (SAS) DSO80604B 6 GHz

2.125 Gb/s Fibre Channel 2125 DSO80604B 6 GHz

2.5 Gb/s PCI Express DSO80604B 6 GHz
RapidIO

3.125 Gb/s XAUI DSO80604B 6 GHz

4.25 Gb/s Fibre Chanel 4250 DSO80604B 6 GHz
5 Gb/s PCI Express 2.0 DSO81304B 13 Ghz

Ordering information

To purchase the High-Speed SDA
software with an Infiniium oscil­loscope, please order the option
indicated in the table:

To add the High-Speed SDA
software to an existing Infiniium
oscilloscope, please order the
following:

Oscilloscope Option number Description

8000 and 003 High-Speed SDA software for Infiniium 8000 and
54830 Series 54830 Series oscilloscopes (installed at the fac­tory)

54850 Series 003 High-Speed SDA software for Infiniium 54850
Series oscilloscopes (installed at the factory)
80000 Series 003 High-Speed SDA software for Infiniium 80000A/B
Series oscilloscopes (installed at the factory)

Model number Description

N5384A After-purchase High-Speed SDA software for Infiniium 8000 and
5483XA/B/D oscilloscopes

E2688A After-purchase High-Speed SDA software for Infiniium 54850
and 80000A/B series oscilloscopes

Related Literature

Publication Title Publication Type Publication Number

Infiniium 80000B Series Oscilloscopes and Data Sheet 5989-4604EN
InfiniiMax II Series Probes

Agilent Technologies Data Sheet 5989-4271EN
Infiniium 8000 Series Oscilloscopes

7

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Revised: February 5, 2007

Product specifications and descriptions
in this document subject to change
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© Agilent Technologies, Inc. 2008

Printed in USA, March 25, 2008

5989-0108EN