“Point-Line-Surface”-How does Keysight systematically solve the 800G test and verification

““Keysight continues to support the next generation of wired communication standards, including 800G Ethernet. Our newly released 800G Ethernet test and verification solution has strong demand during the quarter. In our recent cooperation with Cisco and Amphenol, we demonstrated The high-speed network at the same time verifies the interoperability between different vendors, which is a key element of the next-generation network. Our network application test program and physical layer test program, such as bit error rate tester and oscilloscope, cooperate with each other, Improve customers’ insights into next-generation network technologies.” Keysight CEO Ron Nersesian said when he released the company’s third-quarter 2021 financial report a few days ago.

“

“Keysight continues to support the next generation of wired communication standards, including 800G Ethernet. Our newly released 800G Ethernet test and verification solution has strong demand during the quarter. In our recent cooperation with Cisco and Amphenol, we demonstrated The high-speed network at the same time verifies the interoperability between different vendors, which is a key element of the next-generation network. Our network application test program and physical layer test program, such as bit error rate tester and oscilloscope, cooperate with each other, Improve customers’ insights into next-generation network technologies.” Keysight CEO Ron Nersesian said when he released the company’s third-quarter 2021 financial report a few days ago.

800G Ethernet demand is coming

Recently, at the 2021 Optical Expo, 400G products are not uncommon, and 800G related products have even begun to be launched. For this reason, Du Jiwei, market development manager of emerging technologies (quantum, automobiles, data centers, artificial intelligence) in the Greater China Region of Keysight Technologies Said that the research and development work of 400G data center interconnection technology has basically come to an end, and the market has now reached an era when it is ready to fight for production capacity and price. As for the 800G market, it is still in the pilot research stage.

List of major organizations and members for 800G-related communication technologies

At present, domestic and foreign transmission equipment vendors and operators including Huawei, ZTE, Ciena, Infinera, etc. have cooperated to continuously launch 800G live network trials, competing to verify the feasibility of 800G technology. IEEE, OIF, Ethernet Alliance, CCSA and other organizations have started or are preparing to start. 800G standardization research.

According to Li Kai, senior technical consultant and high-speed test technology expert of Keysight Technology (China) Co., Ltd., just as 400G evolved from 8×50G to 4×100G, for 800G, the evolution process is divided into three generations, from the optical interface to the The transition from 8×100G to the optical interface becomes 4×200G, and then the transition to the optical interface is 4×200G.

For 8×100G, the challenge of multimode will be much higher than that of single mode. Li Kai explained that after the single-mode upgrade from 4×100G to 8×100G, the chip itself does not have a brand-new technology. You only need to double the number of channels and pay attention to issues such as power consumption and heat dissipation. For multi-mode, the modulation bandwidth of VCSEL and the inter-mode dispersion of MMF all need breakthroughs in order to achieve a longer transmission distance.

Because of its high cost and long transmission distance, single-mode fiber is mainly used in scenarios such as metropolitan area network and PON. For multi-mode fiber, although the transmission distance is short, because of its relatively low cost, it is more suitable for large-scale data centers. Interconnected high-speed communication scenarios. Now in the IEEE Beyond 400GbE group, a single-wave 100G multi-mode solution is already being considered.
For the multi-mode solution, in addition to the breakthrough in the device itself, the corresponding test instrument also needs a breakthrough.

Point-line-surface systematically solve the pain points in the 800G era

Du Jiwei said that whether it is 8×100G or the 4×200G technology under development, Keysight can provide corresponding measuring instruments to help chip or module manufacturers speed up the development process.

Keysight has always been adhering to the concept of “organic coordination of parts makes the whole larger than the sum of parts”, and systematically solves the pain points of 800G testing and verification from points, lines and planes.

Du Jiwei said that Keysight’s products for 800G can cover the pain points in the 800G technology cycle from simulation, pre-taping verification, prototype performance testing, standard conformance testing, production testing and interconnection testing, etc., with the full platform and multiple dimensions. “If the product is a point, by effectively cooperating with other instruments to complete a specific scenario test, it can be regarded as a line, and more lines are combined together with a unified software algorithm to get through the overall solution for 800G. You can see Make a face.” Du Jiwei said.

“Using the open end-to-end overall solution can achieve many advantages, such as the unified connection of data and algorithms between different links in the product life cycle, minimizing the wrangling and excuses between different departments, and even the acquisition Measure separation and improve the utilization rate of the instrument.” Du Jiwei concluded: “Although many of our products are in no-man’s land, only by forming lines and surfaces can we completely solve user pain points.”

At present, Keysight has also launched an 800G special page, detailing the products and solutions that Keysight can provide under each stage of the 800G test. https://www.keysight.com/cn/zh/solutions/emerging-technologies/800g.html

Keysight’s comprehensive program portfolio for the 800G market

N1077B multimode optoelectronic integrated clock recovery module fills the gap in the industry

On September 16, Keysight announced the launch of the N1077B multi-mode optoelectronic integrated clock recovery module, which enables its multi-mode and multi-mode clock recovery family to fully cover the data rate range of 50MBd to 64GBd. Among them, N1076B supports electrical signal clock recovery. The optoelectronic integrated clock recovery module N1077A supports single/multi-mode optoelectronic signal clock recovery, and the optoelectronic integrated clock recovery module N1078A supports single-mode optoelectronic signal clock recovery. The new N1077B multi-mode optoelectronic integrated clock recovery module launched this time supports PAM4 and NRZ signals with a rate of up to 64GBd to achieve single-wave 100G multi-mode short-distance testing.

Keysight’s comprehensive clock recovery solution, covering electrical/optical interfaces from 50 MBd to 64 GBd

Hu Bing, Business Development Manager of Keysight Network Infrastructure and Data Center, introduced the function of the clock recovery module: For user test scenarios, it is necessary to use the clock recovery module to extract the clock from the signal under test, and then connect it to the oscilloscope or error code Analyzer for analysis. In the past, some users developed their own clock recovery solutions, but with the arrival of the PAM4 modulation era, coupled with the significant increase in data rate, the clock recovery module must be used in complex environments such as asynchronous photoelectric signals.

For this reason, in various standard tests, clock recovery is used as a necessary test equipment. In addition, for some devices that do not provide a clock signal, or in situations where the delay time from clock to data is too long (such as using a long optical fiber winding wheel), the clock recovery module can accurately recover the signal.

The N1077B multimode optoelectronic integrated multimode clock recovery module can provide the following advantages:

Supports short-distance multi-mode clock recovery for 100G/400G/800G applications, including single-wave 100G clock recovery
The built-in equalizer with adjustable parameters opens the closed eye diagram.
High sensitivity photoelectric signal clock recovery, high eye pattern/mask test redundancy
Option JSA enhances jitter measurement accuracy

As shown in the figure above, Keysight uses N107X clock recovery products to implement production testing of optical modules with N109x series oscilloscopes, or to implement next-generation single-channel or single-wave 200G R&D testing with N1000A series oscilloscopes.

Summarize

Massive data streams from 5G and the Internet of Things are driving the explosive growth of traffic and generating unprecedented bandwidth demands across networks and data centers. The rise of edge computing has also allowed data centers to develop on the edge. Regardless of whether it is viewed from the cloud or the edge, the total amount of data centers is expanding rapidly, but at the same time, the reduction in fixed asset investment has brought tremendous pressure to equipment vendors.

With the introduction of 400G transceivers in data centers, 800G research is underway. With the ever-increasing transmission requirements, how to develop new solutions faster and reduce costs as much as possible is the key to the differentiation of major manufacturers. To this end, on the one hand, Keysight continues to introduce new products that enter the “no man’s land”, and on the other hand, it triggers from multiple dimensions of point, line, and surface, and launches solutions from a more comprehensive perspective to help customers in the complete development and production In each phase of the cycle, the goals of saving test time and saving expensive redesign costs are achieved.