View N2808A_8621677.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

keysight N2808A precisionprobe for the 9000 series data sheet
02 | keysight | N2808A precisionprobe for the 9000 series - data sheet keysights 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: C 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 C quickly and accurately compensate for probe and cable loss, gaining you valuable margins C correct probing issues such as phase non-linearity, magni - tude non-flatness, and see the effect of probe loading C quickly gain insight into the impedance/capacitance that defines your connection C increase the bandwidth of your oscilloscope and probe background C 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. infniisim n5465a software). however, de-embedding software requires specifc characterization of the cable and the creation of an s-parameter fle. 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 fle) to compensate for of every similar cable you own, causing the magnifcation 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 thats 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.
03 | keysight | N2808A precisionprobe for the 9000 series - data sheet background C precisionprobe (probe correction) probes and cables are inherently lossy and rarely identical in their characteristics. the loss at times can be substantial, or enough from an ideal fat frequency response to cause variation in measurements and the loss of valuable margins. to compensate for the inherent loss, oscilloscope vendors use dsp correction to compensate for loss caused by probes. the vendor uses a golden model and base, all compensation/ correction on the single model. while this strategy mitigates the inherent loss of the probe it cant solve probe to probe variation. if a probes characteristics have changed/drifted or were not close to the model to begin with, the compensation may cause the probe to make worse measurements. there are also a myriad of probe heads to attach to probe amplifers, to achieve maximum accuracy every combination must be measured down to the indiviual probe head, tip, and amplifer. oscilloscope vendors are unable to measure to this level of accuracy and the end result is that you get unwanted inaccuracies and probe to probe variability. you also use custom probes and probe heads. while this provides great convenience for you it means that the oscilloscope vendor no longer can even provide a golden compensation for your probe confguration. as a result, custom probes are uncorrected and inaccurate, but convenient. you may also want to add something between the probe amplifer (such as keysights 3.5 ghz 1131a) probe amplifer and (such as keysights 6 ghz e2675a browser) probe head, including a cable to add length or a switch matrix. adding a new element in the probe system adds inaccuracies as as the probe amplifer and browser head are compensated to the model, but the newly created probe system now has no model. the result is that you must except the inaccuracies that have been added or try to characterize the additional element in the probe link. while accepting both of these trade-offs can be suffcient, it is time consuming to evaluate the element every time and not characterizing the element causes loss of margins (including higher jitter, smaller eyes, and slower rise times). this can also be the cause of differences between numbers measured in simulation and the number actually achieved in actual measurements. figure 3. probe browser with a non-standard pitch figure 4. image of custom probe figure 5. image using lw zif head
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 fve minutes in most cases) and accurately characterizes the desired element in the system without the need for additional test and measurement equipment. precisionprobe C removes unwanted cable loss C characterizes probe input impedance C 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 fve minutes without adding more complicated, expensive equipment. precisionprobe saves time and money while increasing accuracy. when combining infniimax probes with switches between the amplifer 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.
05 | keysight | N2808A precisionprobe for the 9000 series - data sheet precisionprobe correction (probes) two methods exist for correcting probe responses, vout/vin and vout/vsource vout/vin correction vout/vin characterizes the output of the probe as a function of the input at the probe tips. defning the response this way allows you to evaluate the probes accuracy in reproducing the actual signal present in your system with the probe attached. this correction is known as vout/vin, which is what youd see with a real band limited probe that has fnite input impedance. precisionprobe corrects the vout/vin response to be fat with frequency and phase to your defned bandwidth limit. it does not correct the loading effects of the probe. it should be noted that keysight s probe frequency response corrections are typically defned using vout/vin. vout/vsource correction the second way to correct probes is an estimate known as vout/ vsource, this method corrects the probe as what would be there if the probe were not present. there are oscilloscope and probe manufacturers that design their probes and dsp correction software to display what the waveform would have been in the absence of the probe. one drawback of defning the probes response in this manner is that if the probes loading causes your circuit to lose some timing or amplitude margin, you probably want to know that when you make a measurement. vout/vsource compensation will hide these effects from you. precisionprobe also gives you the freedom to choose this method of correction, 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.
06 | keysight | N2808A precisionprobe for the 9000 series - data sheet precisionprobe correction (probes) s21 insertion loss correction precisioncable can be used to remove insertion loss caused by cables or fxtures. previously the only way to do this analysis was to characterize the cable using simulation, tdr, or a vna. all of these methods can be accurate and can yield the desired results. you would then take the newly created s-parameter fle to the oscilloscope and use the de-embedding software to remove the insertion loss of the fxture or cable. while this method works, it requires extra equipment and effort. precisioncable allows for this characterization to be done inside of the same oscilloscope that the measurements will be taken. characterizing the cables and fxtures takes less than fve minutes in many cases which saves signifcant time. note: this measurement does require access to both ends of the fixture or cable, similar to methods such as vna and tdr. figure 8. precisionprobe corrects phase non-linearities, notice the new flat phase. figure 7. example of frequency response correction of a cable. the 3 db down point moved from 2.5 ghz to 4 ghz.
07 | keysight | N2808A precisionprobe for the 9000 series - data sheet analysis tools precisionprobe provides many tools to allow you to know exactly what has been characterized and what parameters have been improved by the innovative software. precisionprobe wizard precisionprobe provides an easy to follow guide with its wizard. the wizard takes you step by step through the set up of the software and ensures that your measurements are taken with the highest signal integrity. probe correction to maximize margins it is important to correct each probe identically and to ensure the correction method is the same. the probe correction menu allows you to change between vout/ vin and vout/vsource. precisionprobe also allows for the source impedance via s-parameter fle or an estimate. this is important when measuring vout/vsource to ensure a high level of accuracy as assuming an ideal 50 ohm environment can cause unwanted errors. bandwidth control software such as precisionprobe can amplify high frequency noise when correcting for the loss of a probe or cable. the high frequency noise can then cause unwanted noise and inaccuracies. bandwidth control allows you to remove unwanted high frequency noise by providing a flter. precisionprobe also provides the ability to control the amount of gain that is applied to the signal. you can increase the amount of boosting which improves risetimes but also increases noise, or you can decrease the amount of boosting which decreases noise but degrades rise times. figure 9. starting the precisionprobe wizard figure 10. choosing the probe correction that you need figure 11. use bandwidth control to maximize margins
08 | keysight | N2808A precisionprobe for the 9000 series - data sheet understanding the analysis charts precisionprobe comes with many analysis charts that make understanding the characterization and correction very easy and provide insight that is unique to keysight oscilloscopes. the summary chart the summary chart shows the frequency response of the corrected probe or vout (notice how fat the response is). the chart also shows the transfer function (tf) that is applied to the signal. probe input impedance knowing the impedance profle of the probe allows you to estimate the loading of the probe system. precisionprobe allows for you to characterize the impedance profle, along with quickly determining the capacitance, impedance and inductance. markers allow for easy viewing of the capacitance and inductance at each frequency. probe correction flter the probe correction flter simply shows the flter that is being applied to adjust for the probe. this flter is designed to ensure the signal stays perfectly fat. figure 12. the summary chart figure 13. precisionprobe properly characterizes a 2 pf capacitor figure 14. probe correction summary
09 | keysight | N2808A precisionprobe for the 9000 series - data sheet conclusion using precisionprobe provides the highest level of accuracy without requiring additional equipment. precisionprobe will help with accuracy by doing the following: C removing insertion loss caused by cables C characterizing the impedance of your probe C removing probe to probe variation C correcting for loss and non-linearities in custom probes C correcting for solutions such as switch matrices figure 15. real time eye with uncorrected cable loss figure 16. real time eye with corrected cable using precisionprobe, notice that by correcting for cable loss there is a gain of 37mv in the eye height measurement!
10 | keysight | N2808A precisionprobe for the 9000 series - data sheet ordering information option standalone 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 C 3.5 mm C 1m 5061-5311 2 5061-5311 2 high performance input cable C 3.5 mm C 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 verifcation and deskew fxture 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
mykeysight www.keysight.com/find/mykeysight a personalized view into the information most relevant to you. three-year warranty www.keysight.com/find/threeyearwarranty keysights 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 keysights 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: keysights 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, weve been helping you unlock measurement ins ights. 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 pacifc 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

▲Up To Search▲

Price & Availability of N2808A

	To Download N2808A Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .