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Keysight N7020A

Power Rail Probe

User’s Guide

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Содержание N7020A

Страница 1: ...Keysight N7020A Power Rail Probe User s Guide ...

Страница 2: ...se which is embodied in its End User License Agreement EULA a copy of which can be found at http www keysight com find sweula The license set forth in the EULA represents the exclusive authority by which the U S govern ment may use modify distribute or disclose the Software The EULA and the license set forth therein does not require or permit among other things that Keysight 1 Fur nish technical i...

Страница 3: ...irements for Optimum Probe Performance 24 Common Types of Power Integrity Measurements 27 Connecting to the DUT 29 Avoiding Costly Repairs 31 3 Calibrating 33 DC Attenuation Offset Calibration Using N7022A Main Cable 34 DC Attenuation Offset Calibration Using N7023A Power Rail Probe Browser 35 4 Specifications and Characteristics 37 Specifications and Characteristics 38 Probe Dimensions 40 5 Perfo...

Страница 4: ...4 N7020A User s Guide Contents 6 Performance Verification 49 Procedure 50 Performance Test Record 51 Index ...

Страница 5: ...ovides the following advantages Low noise due to a low attenuation ratio 1 1 1 and 50Ω output See Figure 1 on page 6 and Figure 2 on page 6 A large 24V probe offset range The offset allows small signals 1 mV that exist on top of a DC supply to be centered on an oscilloscope screen for maximum vertical sensitivity Low DC loading due to a 50 kΩ input impedance at DC Large 850 mV active signal range ...

Страница 6: ...6 N7020A User s Guide 1 General Information Figure 1 Example of Measured Mean Noise at 2 GHz BW 1 04369 mVp p Figure 2 Example of Measured Mean Noise at 20 MHz BW 443 74 mVp p ...

Страница 7: ...n defects and incorporate product enhancements To download the latest firmware go to www keysight com and search for your oscilloscope s topic Click on the Drivers Firmware Software tab NOTE The N7020A probe is designed for oscilloscopes with 50Ω AutoProbe interface channel inputs The AutoProbe interface provides the power to the probe Table 1 Compatible Oscilloscopes and Support Infiniium Oscillo...

Страница 8: ...8 N7020A User s Guide 1 General Information Accessories Supplied Accessories The probe comes with the accessories shown in Figure 3 Figure 3 Probe with Accessories ...

Страница 9: ...7022A Main Cable 1 N7023A Power Rail Probe Browser with accessories 1 Ground spring 2 5 mm 1 Ground lead 15 cm 1 Spring loaded probe tips 3 One spring loaded tip is pre installed by Keysight into the N7023A browser Rigid probe tips 2 Dual lead adapter 1 Micro SMD clip Also called as Surface Mount Grabber 1 Protection cap 2 5 mm Not shown in figure 1 Color coding rings 3x4 colors ...

Страница 10: ... use this browser replace the N7022A main cable attached to the N7020A power rail probe with the N7023A power rail probe browser as shown in the figure below 2 5 mm Ground Spring The ground spring provides the highest performance connection for the N7023A power rail probe browser 15 cm Ground Lead This ground lead can be used to reach grounding locations that are farther away from the probing loca...

Страница 11: ...pacitors The Micro SMD clip is used in conjunction with the dual lead adapter It is a best practice to twist the leads of the dual lead adapter to reduce coupling of external noise into the probe Channel Identification rings The channel identification rings can be used to keep track of which probe is connected to which channel input on your oscilloscope Place one ring on the probe cable near the o...

Страница 12: ...pliers to grip the tip and pull it straight out of its contact socket along the axis of the N7023A power rail probe browser Do not grip the plastic insulator or the housing with the pliers because the tip could be crushed see Figure 4 This could result in being unable to remove the tip and or damaging the N7023A power rail probe browser Once the N7023A power rail probe browser tip is removed the n...

Страница 13: ...General Information 1 N7020A User s Guide 13 Orderable Accessories The orderable parts shown in this picture are listed in Table 3 on page 14 ...

Страница 14: ...7 mm black 3 0960 2986 Insulating Cap 2 5 mm 1 0960 2985 Ground Spring 2 5 mm 3 0960 2980 N4838A Set of 5 Spring Tips Gold plated 0 5 mm 1 0960 2981 Set of 5 Solid tips CuBe 0 5 mm 1 0960 2979 Dual adapter 2 5 to 0 8 mm sockets 1 0960 2898 N4836A QFP IC Clips 13 mm long down o 0 5 mm pitch 1 pair yellow green 2 0960 2992 QFP IC Clips short down to 0 5 mm pitch 1 pair yellow green 2 0960 2995 Groun...

Страница 15: ...otify your Keysight Technologies Sales Office If the shipping container is damaged or the cushioning materials show signs of stress notify the carrier as well as your Keysight Technologies Sales Office Keep the shipping materials for the carrier s inspection The Keysight Technologies office will arrange for repair or replacement at Keysight Technologies option without waiting for claim settlement ...

Страница 16: ...th the extra thin and sharp spring contact tip CAUTION The browser cable is a sensitive part of the N7023A power rail probe browser and therefore you should be careful not to damage it through excessive bending or pulling You should also avoid any mechanical shocks to this product in order to guarantee accurate performance and protection ...

Страница 17: ...ower rail probe from the oscilloscope and clean the probe with a soft cloth dampened with a mild soap and water solution Make sure that the probe is completely dry before reconnecting it to an oscilloscope Avoid using abrasive cleaners and chemicals containing benzene or similar solvents ...

Страница 18: ...review and comply with the following safety precautions Be aware that if you use this probe assembly in a manner not specified the protection this product provides may be impaired WARNING Use Only Grounded Instruments Do not connect the probe s ground lead to a potential other than earth ground Always make sure the probe and the oscilloscope are grounded properly WARNING Connect and Disconnect Pro...

Страница 19: ...age reduction or mains isolation the ground pin of the input connector terminal must be connected to the earth terminal of the power source WARNING Before turning on the instrument you must connect the protective earth terminal of the instrument to the protective conductor of the mains power cord The mains plug shall only be inserted in a socket outlet provided with a protective earth contact You ...

Страница 20: ...ach it to the malfunctioning equipment Name and address of owner Product model number for example N7020A Product Serial Number for example MYXXXXXXXX Description of failure or service required 3 Protect the probe by wrapping in plastic or heavy paper 4 Pack the probe in the original carrying case or if not available use bubble wrap or packing peanuts 5 Place securely in sealed shipping container a...

Страница 21: ...Technologies For technical assistance contact your local Keysight Call Center In the Americas call 1 800 829 4444 In other regions visit http www keysight com find assist Before returning an instrument for service you must first call the Call Center at 1 800 829 4444 ...

Страница 22: ...22 N7020A User s Guide 1 General Information ...

Страница 23: ... Test DUT and how to protect the oscilloscope and probe from damage due to ESD CAUTION Always wear an ESD wrist strap when working with active probes Not doing so can result in damage to the probe and to the oscilloscope s input channel NOTE If the N7020A input is connected to an S series oscilloscope at vertical settings at or below 20 mV div with more than 200 mV of applied offset with no signal...

Страница 24: ... of a power rail The N7020A has a non flat input impedance that transitions from 50 kΩ at DC to 50Ω at 1 MHz and above Therefore if the DUT impedance is not low it will divide with the probe s impedance unequally across frequency causing a non flat measurement The recommended DUT impedance should be much less than 1 ohm At 1 ohm the DC to AC non flatness is about 2 Figure 5 shows the non flatness ...

Страница 25: ...y Figure 6 Input Impedance Versus Frequency Zin Measured Zin Modeled N7020A with N7022A Main Cable Minimize Probe Ground Impedance for the Best Signal Fidelity The N7020A is a single ended probe that is designed for measuring small signals riding on large DC voltages By using the oscilloscope s offset knob to offset the DC voltage you can analyze a power rail using maximum vertical sensitivity Wit...

Страница 26: ... The adapters are not supplied with the probe The N7021A is a prepared coaxial cable pigtail that allows the probe to be soldered to the DUT It is recommended that the coaxial shield be soldered directly to ground thus minimizing the ground impedance As with any single ended probe there may be a concern of creating a ground loop by the connection of the DUT ground to the probe scope ground This ge...

Страница 27: ...ntegrity Measurements The following list some of the common types of power integrity measurements that you can perform using the N7020A probe Static and dynamic load response Figure 7 Example of Response to Changing Load Supply drift Programmable power rail response ...

Страница 28: ... N7020A High frequency transients and noise PARD Periodic and Random Disturbances such as noise ripple and switching transients on power rails Figure 8 Example of PARD on DC Output Product electrical validation at extended temperatures ...

Страница 29: ...plied SMA adapter to connect the two cables N7020A probe with the N7023A power rail probe browser used in the same manner as a traditional passive probe This browser is connected to the probe by replacing the N7022A main cable The N7022A main cable allows you to probe DUTs that are located up to 1 2 meters from the probe The N7021A pigtail cable is designed to be soldered onto the DUT Figure 9 on ...

Страница 30: ...f The N7021A Cable Across a Bypass Capacitor CAUTION To avoid accidentally shorting the circuit via the cable s exposed ground place a small strip of non conductive tape onto the board before attaching the coax To avoid undue stress to the solder joints tape the cable to the DUT ...

Страница 31: ...sed alone To ensure user safety the static safe accessories must provide at least 1 MΩ of isolation from ground Purchase acceptable ESD accessories from your local supplier CAUTION When the probe is connected to the oscilloscope the oscilloscope s channel input circuits can be damaged by electrostatic discharge ESD Avoid applying static discharges to the probe input Prior to energizing and connect...

Страница 32: ...32 N7020A User s Guide 2 Using the N7020A Figure 10 ESD Workstation ...

Страница 33: ...hat are introduced by the probe This chapter contains basic calibration procedures for the supported Infiniium oscilloscopes For additional information on the probe calibration refer to the oscilloscope s user documentation The following calibrations are described in this chapter DC Attenuation Offset Calibration Using N7022A Main Cable DC Attenuation Offset Calibration Using N7023A Power Rail Pro...

Страница 34: ...libration before the probe calibration On the oscilloscope click Utilities Calibration 4 Connect the output of the N7022A main cable to the oscilloscope s rear panel AUX OUT BNC connector as shown in the following picture You ll need a BNC m to SMA f adapter Figure 11 Calibration Setup 5 On the oscilloscope click Setup Probes 6 In the Probe Calibration dialog box select the tab representing the ch...

Страница 35: ...scilloscope needs calibration perform a user calibration before the probe calibration On the oscilloscope click Utilities Calibration 4 Connect the ground lugs and the output of the N7023A power rail probe browser to the oscilloscope s front panel PROBE COMP connector 5 On the oscilloscope click Setup Probes 6 In the Probe Calibration dialog box select the tab representing the channel that has the...

Страница 36: ...36 N7020A User s Guide 3 Calibrating ...

Страница 37: ...ions 40 The tables in this chapter list the specifications for the N7020A probe Input Impedance DC is the only warranted specification Connect the probe to a powered on oscilloscope for at least 20 minutes before any testing to allow the probe to warm up Ensure that the environmental conditions do not exceed the probe s specified limits ...

Страница 38: ...pes in the WEEE Directive Annex I this product is classed as a Monitoring and Control instrumentation product Do not dispose in domestic household To return unwanted products contact your local Keysight office or refer to www keysight com for more information Table 5 Environmental Specifications Description Specification Probe with N7022A Main Cable N7021A Pigtail Cables Specification Probe with N...

Страница 39: ...ut Impedance at DC 50 kΩ 2 50 kΩ 2 Active Signal Range 850 mV about offset voltage 850 mV about offset voltage Probe Noise at 2 GHz 10 increase in the noise of the connected Oscilloscope 10 increase in the noise of the connected Oscilloscope Output Termination 50 Ω scope input 50 Ω scope input Probe Type Single Ended Single Ended Warranted specification Table 7 Mechanical Characteristics of the N7...

Страница 40: ...40 N7020A User s Guide 4 Specifications and Characteristics Probe Dimensions Figure 12 Probe and Accessory Cable Dimensions ...

Страница 41: ...ce Plots 42 N7020A Input Impedance Equivalent Model 46 This chapter includes plots that show the probe s characteristic performance and an input impedance model of the probe The performance characteristic plots in this chapter are for the N7020A probe with the N7022A main cable attached ...

Страница 42: ...42 N7020A User s Guide 5 Performance Plots N7020A Performance Plots Figure 13 Normalized Frequency Response Vout Vin 2 5 GHz BW N7020A with N7022A Main Cable ...

Страница 43: ...Performance Plots 5 N7020A User s Guide 43 Figure 14 Frequency Response for Different DUT Impedances N7020A with N7022A Main Cable ...

Страница 44: ...5 Performance Plots Rise Time Input Step 10 90 250 ps Rise Time Input Step 20 80 169 ps Rise Time N7020A with N7022A 10 90 297 ps Rise Time N7020A with N7022A 20 80 192 ps Figure 15 Step Tracking N7020A with N7022A Main Cable ...

Страница 45: ...Performance Plots 5 N7020A User s Guide 45 Figure 16 Input Impedance Versus Frequency Zin Measured Zin Modeled N7020A with N7022A Main Cable ...

Страница 46: ...D N01629 GND Z0 55 4861 TD 14 8781ps T_T16 N01709 GND VOUT GND Z0 50 4332 TD 1 00771ns T_T15 N01706 GND N01709 GND Z0 50 9109 TD 173 772ps C_C1 N01652 N01667 9n R_R2 N01667 N01670 3 9 T_T11 N01670 GND N01673 GND Z0 47 0657 TD 32 9877ps T_T12 N01673 GND N01676 GND Z0 48 4028 TD 97 8628ps T_T14 N01679 GND N01706 GND Z0 51 4414 TD 471 443ps T_T6 N01629 GND N01632 GND Z0 52 1033 TD 38 7418ps T_T13 N01...

Страница 47: ...Performance Plots 5 N7020A User s Guide 47 Figure 17 Input Impedance Equivalent Model ...

Страница 48: ...48 N7020A User s Guide 5 Performance Plots ...

Страница 49: ...ance probes resulting in costly repairs Always wear a wrist strap when handling probe components and ensure that cables are discharged before being connected NOTE Allow the probe to warm up for at least 20 minutes Table 9 Required Test Equipment Test Equipment Critical Specification Model Number Oscilloscope Supported Oscilloscope S Series or 9000A series Infiniium Oscilloscope Digital Multimeter ...

Страница 50: ... Power on the oscilloscope with the oscilloscope application maximized 3 Power on the DMM and select the 2 wire Ohm display on the DMM Figure 18 Test Setup 4 Read the DMM display for the input resistance 5 Record the result in Table 10 on page 51 To pass this test the result should be between 49 kΩ and 51 kΩ ...

Страница 51: ...Performance Verification 6 N7020A User s Guide 51 Performance Test Record Serial Date Tested by Recommended Next Test Date Table 10 Input Impedance Test Results Test Limits Result Pass Fail 50 kΩ 2 ...

Страница 52: ...52 N7020A User s Guide 6 Performance Verification ...

Страница 53: ...gies contacting 21 M measurement category 38 Mechanical Characteristics 39 O Orderable Parts 13 oscilloscope compatibility 7 P performance test record 51 Power Rail Probe Browser 10 probe cable care 5 cleaning 17 grounding 15 inspecting 15 service 20 Probe Calibration dialog box 34 R repair 20 resistance testing 49 returning for service 20 S safety 18 Safety Considerations 18 safety specifications...

Страница 54: ...54 N7020A User s Guide Index ...

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