N2808A KEYSIGHT | Alldatasheet
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PrecisionProbe for the 9000 Series Data Sheet
02 | Keysight | N2808A PrecisionProbe for the 9000 Series - Data Sheet Keysight’s PrecisionProbe TDT (N2808A) allows you to characterize and correct your measurement system quickly and accurately, without adding expensive equipment. PrecisionProbe solves measurement challenges by allowing you to: – Characterize the frequency response (both magnitude and phase) of any input to the 9000 Series without the need for extra equipment such as a VNA or TDR – Quickly and accurately compensate for probe and cable loss, gaining you valuable margins – Correct probing issues such as phase non-linearity, magni - tude non-flatness, and see the effect of probe loading – Quickly gain insight into the impedance/capacitance that defines your connection – Increase the bandwidth of your oscilloscope and probe Background – PrecisionProbe (Cable correction) A measurement system is only as good as its weakest link. Users spend thousands of dollars on test and measurement equipment, including oscilloscopes, but then ignore the weakest element in their link, the cable. Oscilloscope vendors now provide methods to strengthen the weak link with the use of de-embedding software (Keysight Technologies, Inc. InfiniiSim N5465A software). However, de-embedding software requires specific characterization of the cable and the creation of an s-parameter file. To get the correct characterization you must characterize the cable using either a TDR or a VNA. Both of these methods provide characterization and s-parameters, but take time and instrument knowledge and more investment on test and measurement equipment. It is the time, knowledge, and additional equipment that causes us to simply choose to ignore cable loss, and measurements taken by the oscilloscope now may be measuring the weakest link (the cable) and not the device you wish to measure as cable loss can dominate a measurement. At best you may choose to characterize only one or two cables, and use that characterization (s-parameter file) to compensate for of every similar cable you own, causing the magnification of cable-to-cable variability as the cables characteristics vary from the “golden” cable. Figures 1 and 2. Cable loss degrades rise times and causes measurement non-repeatability. Figure 1 shows the rise time of a signal with a cable that’s loss is uncharacterized and not compensated. Figure 2 shows the same measurement with characterization and compensation. Notice the rise time is >15% faster and the measurement is nearly 50% more repeatabile.
04 | Keysight | N2808A PrecisionProbe for the 9000 Series - Data Sheet Solution - PrecisionProbe PrecisionProbe for the 9000 can solve the problems outlined in the background information by allowing quick characterization of your entire probe system (including cables and switches). The award winning, innovative technology takes advantage of the calibration output of the 9000 Series oscilloscopes to properly characterize cables and probes. The software quickly (less than five minutes in most cases) and accurately characterizes the desired element in the system without the need for additional test and measurement equipment. PrecisionProbe – Removes unwanted cable loss – Characterizes probe input impedance – Properly Creates Custom Probe Transfer Function = VOut / VIn or VOut/VInc = VOut/VSrc Now every probe and cable in your system can have the exact same frequency response probe to probe or cable to cable, without the inaccuracies that using one model can produce. Custom probes can now be properly characterized and unwanted responses can be removed. Not only does PrecisionProbe characterize the cables, it allows for immediate use on the same instrument. You can characterize your measuring system and be using it within five minutes without adding more complicated, expensive equipment. PrecisionProbe saves time and money while increasing accuracy. When combining Infiniimax probes with switches between the amplifier and the probe head, PrecisionProbe allows for full correction and automation of each probes path. Full automation is then available to allow for swapping of the inputs and never leaving the automation.
actual signal present in your system with the probe attached. with a real band limited probe that has finite input impedance. which can be effective if probing at the transmitter. Figure 6. A probe that has perfect transfer function shows an exact copy of a signal at the input. A probe that has a perfect system response shows the signal at the input of probe boosted by the estimate amount of loading due to the probe.
10 | Keysight | N2808A PrecisionProbe for the 9000 Series - Data Sheet
Ordering Information
DSO 90000 X-Series DSOX90000-001 N2809A-001 DSO90000A DSO90000-001 N2809A-002 DSO9000A DSO9000A-022 N2808A Included Accessoried N2809A-001 or DSOX90000-001 Quantity N2809A-002 or DSO90000-001 Quantity Description N2812A cables 3 N2812A cables 3 High performance input cable – 3.5 MM – 1m 5061-5311 2 5061-5311 2 High performance input cable – 3.5 MM – 1m 11636B-FG 1 DC to 26.5 GHz power divider Recommeded Equipment N2809A-001 or DSOX90000-001 Quantity N2809A-002 or DSO90000-001 Quantity Description N5443A 1 E2655C 1 Performance verification and deskew fixture N2787A 1 N2787A 1 3-D probe positioner 54855-67604 2 Precision BNC adaptor N2808A Quantity Description N2813A 3 3.5 mm 3m cable 5061-5311 2 Connector assembly - 3.5 mm f to f 11636B-FG 1 DC to 26.5 GHz power divider 3 BNC to 3.5 mm connector
11 | Keysight | N2808A PrecisionProbe for the 9000 Series - Data Sheet Keysight Oscilloscopes Multiple form factors from 20 MHz to > 90 GHz | Industry leading specs | Powerful applications
www.axiestandard.org AdvancedTCA® Extensions for Instrumentation and Test (AXIe) is an open standard that extends the AdvancedTCA for general purpose and semiconductor test. Keysight is a founding member of the AXIe consortium. ATCA®, AdvancedTCA®, and the ATCA logo are registered US trademarks of the PCI Industrial Computer Manufacturers Group. www.lxistandard.org LAN eXtensions for Instruments puts the power of Ethernet and the Web inside your test systems. Keysight is a founding member of the LXI consortium. www.pxisa.org PCI eXtensions for Instrumentation (PXI) modular instrumentation delivers a rugged, PC-based high-performance measurement and automation system. 12 | Keysight | N2808A PrecisionProbe for the 9000 Series - Data Sheet
www.keysight.com/find/mykeysight A personalized view into the information most relevant to you. Three-Year Warranty www.keysight.com/find/ThreeYearWarranty Keysight’s committed to superior product quality and lower total cost of ownership. Keysight is the only test and measurement company with three-year warranty standard on all instruments, worldwide. And, we provide a full one-year warranty on all accessories, calibration devices, systems and custom products. Keysight Assurance Plans www.keysight.com/find/AssurancePlans Up to ten years of protection and no budgetary surprises to ensure your instruments are operating to specification, so you can rely on accurate measurements. Keysight Infoline www.keysight.com/find/service Keysight’s insight to best in class information management. Free access to your Keysight equipment company reports and e-library. Keysight Channel Partners www.keysight.com/find/channelpartners Get the best of both worlds: Keysight’s measurement expertise and product breadth, combined with channel partner convenience. www.keysight.com From Hewlett-Packard through Agilent to Keysight For more than 75 years, we‘ve been helping you unlock measurement insights. Our unique combination of hardware, software and people can help you reach your next breakthrough. Unlocking measurement insights since 1939.
1939 THE FUTURE
For more information on Keysight Technologies’ products, applications or services, please contact your local Keysight office. The complete list is available at: www.keysight.com/find/contactus Americas Canada (877) 894 4414 Brazil 55 11 3351 7010 Mexico 001 800 254 2440 United States (800) 829 4444 Asia Pacific Australia 1 800 629 485 China 800 810 0189 Hong Kong 800 938 693 India 1 800 11 2626 Japan 0120 (421) 345 Korea 080 769 0800 Malaysia 1 800 888 848 Singapore 1 800 375 8100 Taiwan 0800 047 866 Other AP Countries (65) 6375 8100 Europe & Middle East Austria 0800 001122 Belgium 0800 58580 Finland 0800 523252 France 0805 980333 Germany 0800 6270999 Ireland 1800 832700 Israel 1 809 343051 Italy 800 599100 Luxembourg +32 800 58580 Netherlands 0800 0233200 Russia 8800 5009286 Spain 800 000154 Sweden 0200 882255 Switzerland 0800 805353 Opt. 1 (DE) Opt. 2 (FR) Opt. 3 (IT) United Kingdom 0800 0260637 For other unlisted countries: www.keysight.com/find/contactus (BP-10-30-15) www.keysight.com/go/quality Keysight Technologies, Inc. DEKRA Certified ISO 9001:2008 Quality Management System 13 | Keysight | N2808A PrecisionProbe for the 9000 Series - Data Sheet This information is subject to change without notice. © Keysight Technologies, 2011 - 2015 Published in USA, November 3, 2015 5990-9316EN www.keysight.com