Agilent Technologies Inc. (NYSE: A) recently announced the
industry's first reference clock multiplier. The Agilent N4880A reference clock
multiplier enables R&D and test engineers to lock the pattern generator
clock of the J-BERT N4903B and the ParBERT 81250A to
reference clocks from the system under test.
The new solution supports multiple reference clock rates ranging
from 19 to 100 MHz for receiver test applications such as PCIe® 1.x, 2.x and
3.0 main boards, MIPI M-PHY devices and UHS-II host devices. The use of the
reference clock multiplier significantly simplifies the receiver test setup,
helping R&D and test teams to accurately characterize and verify standard
compliance under easy to reproduce test conditions.
With common reference clock architectures, where the host cannot
run on an external reference clock, it is necessary to lock the generated
stressed-pattern signal to the reference clock from the receiver under test.
That's because the receiver under test also derives its sampling clock from
this reference clock. Not locking the stressed pattern generator to the same
reference clock would lead to wrong and non-reproducible jitter-tolerance test
results.
Some emerging and existing standards require this test topology:
the PCI Express® rev 2.x and 3.0 CEM specifications from the PCI-SIG®, the MIPI
M-PHY draft specification from the MIPI alliance, and the draft SD card
specification for UHS-II host devices use a common reference clock
architecture. In the past it was very cumbersome to reproduce such setups and
it was not easy to reproduce stress conditions, especially when spread-spectrum
clocking and low-frequency jitter components are present on the reference clock
signal.
Agilent's N4880A reference clock multiplier provides
a multiplying phase locked loop (PLL), which enables users to lock the pattern
generators of the J-BERT N4903B high-performance serial BERT and the ParBERT
81250A to such a reference clock. SSC and jitter are fed through the N4880A up
to the PLL bandwidth.
At its reference clock input, the N4880A supports multiple clock
rates: 100 MHz for PCIe 1.x, 2.x and 3.0 CEM test; 19.2 to 52 MHz for MIPI
M-PHY gear 1, 2 and 3 devices; and 26 to 52 MHz for UHS-II host devices. The
bandwidth of the multiplying PLL automatically adapts. Users can control the
settings of the N4880A from a stand-alone user interface running on a Windows
PC via a USB connection.
Benefits of the Agilent N4880A reference clock multiplier include:
- Precise and reproducible
receiver tolerance testing by emulating real-world clock conditions. This
is achieved by transparency to low-frequency jitter and SSC profiles from
the system under test, its tolerance of huge amounts of SSC for UHS-II
reference clocks and its low input sensitivity to handle very low voltage
levels.
- Higher R&D efficiency
enabled by reduced complexity of test setup.
- Investment protection enabled
by supporting multiple reference clock rates ranging from 19 to 100 MHz
and support for J-BERT and ParBERT external clock mode, for PCIe 1.x, 2.x,
and 3.0, SD card UHS-II, and MIPI M-PHY.
"Agilent's new N4880A reference clock multiplier fills a
critical need for R&D and test engineers who want to characterize and
release the next generation of PCI Express main boards, MIPI M-PHY chipsets and
UHS-II host devices," said JΓΌrgen Beck, general
manager of Agilent's Digital Photonic Test Division. "By adding our
expertise in emulating stress signals and accurate receiver characterization,
we again confirm our commitment to enable R&D teams to efficiently release
robust, next-generation devices and boards for the server, mobile computing and
storage industry."
U.S. Pricing and Availability
The N4880A is priced at $9,850 and available now.
More information about the Agilent N4880A is available at www.agilent.com/find/n4880.
Photos of the solution are available at www.agilent.com/find/n4880_images.
Information about Agilent's PCIe 3.0 receiver test solutions is
available at http://www.agilent.com/find/pcie_receiver_test.
Information about Agilent's MIPI test solutions is available at www.agilent.com/find/mipi.
Agilent's Digital Test Standards Program
Agilent's solutions for digital applications are driven and
supported by Agilent experts who are involved in various international
standards committees. Experts from the Agilent Digital Test Standards Program
are active in the Joint Electronic Devices Engineering Council, PCI-SIG, Video Electronics Standards Association, Serial ATA International Organization, Serial
Attached SCSI (T10), USB-Implementers Forum, MIPI Alliance,Ethernet standards (IEEE 802.3), Optical Internetworking Forum and many
others. Agilent's involvement in these standards groups and their related
workshops, plugfests, and seminars enable the company to bring the right
solutions to the market when its customers need them.
About
Agilent Technologies
Agilent Technologies Inc. (NYSE: A) is the world's premier
measurement company and a technology leader in chemical analysis, life
sciences, electronics and communications. The company's 18,700 employees serve
customers in more than 100 countries. Agilent had net revenues of $6.6 billion
in fiscal 2011. Information about Agilent is available at www.agilent.com.