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Keysight N7020A and N7024A Power Rail Probes

User’s Guide

6 Calibrating

N7020A / N7024A Probe’s DC Attenuation/Offset Calibration Using N7022A Main Cable

N7020A / N7024A Probe’s DC Attenuation/Offset Calibration Using N7023A Probe

Browser

Always calibrate the probe before making any critical measurements. A probe

calibration removes attenuation errors, offset errors, and timing delays that 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:
• N7020A / N7024A Probe’s DC Attenuation/Offset Calibration Using N7022A

Main Cable

•

N7020A / N7024A Probe’s DC Attenuation/Offset Calibration Using N7023A

Power Rail Probe Browser

CAUTION

Always wear an ESD wrist strap when working with active probes. Not doing so can result

in the probe becoming permanently damaged.

Summary of Contents for N7020A

Page 1: ...Keysight N7020A N7024A Power Rail Probes User s Guide ...

Page 2: ...om mercial license 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 ...

Page 3: ...chnologies 24 3 Specifications and Characteristics 25 N7020A Probe Specifications and Characteristics 26 N7024A Probe Specifications and Characteristics 30 4 Safety and Regulatory Information 35 5 Using the Power Rail Probe 39 Requirements for Optimum Probe Performance 41 Connecting to the DUT 44 Replacing N7023A Probe Browser Tips 52 Avoiding Costly Repairs 53 Common Types of Power Integrity Meas...

Page 4: ...ing N7023A Probe Browser 59 7 Performance Plots 61 N7020A Performance Plots 62 N7020A Input Impedance Equivalent Model 66 N7024A Performance Plots 68 N7024A Input Impedance Plots 70 8 Performance Verification 77 DC Input Resistance Performance Verification 78 Bandwidth Performance Verification for N7024A Probe 81 Index ...

Page 5: ...5 Keysight N7020A and N7024A Power Rail Probes User s Guide 1 N7020A N7024A Probes Overview Introduction 6 Probe Accessories 9 Oscilloscope Compatibility 16 ...

Page 6: ...t oscilloscope see page 16 The oscilloscope s AutoProbe interface provides the probe power probe offset and auto configuration of probe type and attenuation setting on connection A variety of accessories are shipped with these probes to suit various DUT connection scenarios and to make the connection to DUT possible in the most difficult to reach situations as well see page 44 These probes provide...

Page 7: ...0A probe the N7024A probe provides enhanced features such as higher bandwidth upto 6 GHz compatibility with high end Keysight oscilloscopes V series and Z series improved usability and browsing capabilities unique s parameters stored in each N7024A probe for maximum accuracy CAUTION Before using these probes refer to Safety and Regulatory Information on page 35 Handle the probes with care and refe...

Page 8: ...0A and N7024A Power Rail Probes User s Guide 1 N7020A N7024A Probes Overview 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 ...

Page 9: ...obes User s Guide 9 Probe Accessories Standard Accessories The N7020A and N7024A probes are shipped with the accessories shown in Figure 3 and Figure 4 respectively These standard accessories are described in Table 1 Figure 3 N7020A Probe with Standard Accessories ...

Page 10: ...th Standard Accessories N7024A Probe N7033A Probe Browser N7032A Probe Browser Dual Lead Adapter N7021A Pigtail Cables N7022A Main Cable Wrench N7023A Probe Browser Ground Lead Micro SMD Clip Rotating Adapter Ground Spring SMA Adapter Glass Tube containing Spring loaded and Rigid Probe Tips Color Coding Rings ...

Page 11: ...sed to connect the main cable to the pigtail cable the N7032A N7033A probe browser Rotating Adapter 1 Used to connect the main cable to the pigtail cable the N7032A N7033A probe browser Wrench 1 Used to effectively grip and tighten the smaller side of the rotating adapter N7032A Power Rail Probe Browser 1 Browser based on 086 semi rigid coax that has an approximate fixed span of 055 for probing 06...

Page 12: ...her away from the probing location than can be reached by the ground spring However the longer lead means it has a larger inductance in the ground return path which corresponds to a lower performance than using the ground spring Spring loaded Probe Tips 3 Allows you to probe signals with less susceptibility to vibration or movement than traditional rigid tips The spring loaded tips work when they ...

Page 13: ...ce to twist the leads off the dual lead adapter to reduce coupling of external noise into the probe Protection Cap 2 5 mm 1 Provides a protective cover to the browser when not in use Color Coding Rings 3x4 colors 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 oscilloscope input and place another ring of the same...

Page 14: ...view Optional Orderable Accessories Besides the standard accessories that are shipped with the probes a number of optional accessories are also available that you can order separately These optional accessories are shown in this picture and briefly described in Table 2 on page 15 ...

Page 15: ...989 IC Cap 2 5 1 27 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...

Page 16: ... Compatible Oscilloscopes for the N7024A Probe NOTE The N7020A and N7024A probes are designed for Keysight oscilloscopes with 50Ω AutoProbe interface channel inputs Table 3 Compatible Oscilloscopes for the N7020A Probe Oscilloscopes Required Firmware Version S Series 5 20 9000 Series 5 20 9000A 5 20 6000 X Series 6 10 4000 X Series 4 00 3000T X Series 4 00 3000A X Series 2 39 Infiniium Oscilloscop...

Page 17: ...scilloscope Software Up to Date Keysight periodically releases software updates to support your probe fix known 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 ...

Page 18: ...18 N7020A and N7024A Power Rail Probes User s Guide 1 N7020A N7024A Probes Overview ...

Page 19: ...t N7020A and N7024A Power Rail Probes User s Guide 2 General Information Inspecting the Probe 20 Handling the Probe 21 Cleaning the Probe 22 Returning the Probe for Service 23 Contacting Keysight Technologies 24 ...

Page 20: ...bration tests notify 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 cl...

Page 21: ...hrough excessive bending or pulling You should also avoid any mechanical shocks to this product in order to guarantee accurate performance and protection WARNING Periodically inspect the probe wires and cables to check for any damage The probe must NOT BE USED if there are any signs of damage CAUTION If the N7022A main cable is damaged it may cause the N7024A probe to not meet its warranted bandwi...

Page 22: ...probe from the oscilloscope external power supply and any circuit under test 2 Gently clean the probe with a soft cloth dampened with a mild soap and water solution 3 Wipe with clean water to remove the detergent and then dry thoroughly with a clean cloth 4 Make sure that the probe is completely dry before reconnecting it to an oscilloscope ...

Page 23: ... a tag and attach it to the malfunctioning equipment Name and address of owner Product model number for example N7024A 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 shippi...

Page 24: ...ting Keysight 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 ...

Page 25: ...racteristics 30 The tables in this chapter list the specifications and characteristics for the N7020A and N7024A probes NOTE All entries included in this chapter are characteristics unless otherwise noted Input Impedance DC is the only warranted specification for the N7020A probe Bandwidth for the probe and Input Impedance DC are the only warranted specifications for the N7024A probe ...

Page 26: ...40 C to 70 C probe pod Operating 40 C to 85 C main cable pigtail cable Non operating 40 C to 85 C main cable pigtail cable Operating 10 C to 55 C browser Non operating 40 C to 70 C browser Altitude Operating 3 000 m 9 842 feet Non operating 15 300 m 50 196 feet Operating 3 000 m 9 842 feet Non operating 15 300 m 50 196 feet Humidity Operating 25 85 room humidity Non operating 25 85 room humidity O...

Page 27: ...Browser With N7032A Browser N7022A Main Cable With N7033A Browser N7022AMain Cable Probe Bandwidth 3 dB 2 GHz 2 GHz 350 MHz using the included ground spring 2 GHz 2 GHz Maximum Input Voltage non destructive 30V peak input mains isolated Attenuation Ratio 1 1 1 Offset Range 24V Input Impedance at DC 50 kΩ 2 Active Signal Range 850 mV about offset voltage Probe Noise at 2 GHz 10 increase in the nois...

Page 28: ...de 3 Specifications and Characteristics For a description of safety markings and symbols on the probe refer to the chapter Safety and Regulatory Information on page 35 Table 8 Safety Specifications of N7020A Power Rail Probe Specification IEC61010 031 ...

Page 29: ...Specifications and Characteristics 3 N7020A and N7024A Power Rail Probes User s Guide 29 N7020A Probe Browsers and Cables Dimensions Figure 5 N7020A Probe Browsers and Accessory Cables Dimensions ...

Page 30: ...40 C to 70 C probe pod Operating 40 C to 85 C main cable pigtail cable Non operating 40 C to 85 C main cable pigtail cable Operating 10 C to 55 C browser Non operating 40 C to 70 C browser Altitude Operating 4600 m 15 092 feet Non operating 15 300 m 50 196 feet Operating 4600 m 15 092 feet Non operating 15 300 m 50 196 feet Humidity Operating 25 85 room humidity Non operating 25 85 room humidity O...

Page 31: ... Probe with N7021A Pigtail Cable N7022A Main Cable Probe with N7023A Browser Probe with N7032A Browser N7022A Main Cable Probe with N7033A Browser N7022A Main Cable Probe Bandwidth 3 dB 6 GHz 6 GHz 5 GHz 350 MHz 4 GHz 5 GHz Maximum Input Voltage non destructive 15V peak input mains isolated Attenuation Ratio 1 3 1 Risetime 10 to 90 Calculated as tr 435 bandwidth 73pS 87pS 1 24nS 109pS 87pS Risetim...

Page 32: ...fer to the chapter Safety and Regulatory Information on page 35 Table 11 Mechanical Characteristics of the N7024A Probe and Browsers Description N7024A Probe N7023A Browser N7032A Browser N7033A Browser Weight 155 g 26 g 10 g 10 g Dimensions See Figure 6 on page 33 for dimensions Table 12 Safety Specifications of N7024A Probe Specification IEC61010 031 ...

Page 33: ...Specifications and Characteristics 3 N7020A and N7024A Power Rail Probes User s Guide 33 N7024A Probe Cables and Browsers Dimensions Figure 6 N7024A Probe Browsers and Accessory Cables Dimensions ...

Page 34: ...34 N7020A and N7024A Power Rail Probes User s Guide 3 Specifications and Characteristics ...

Page 35: ...this document WARNING To avoid personal injury and to prevent fire or damage to this product or products connected to it 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 CAUTION These probes are for use only on circuits that are not directly connected to mains Do not u...

Page 36: ...er metallic objects Do not touch exposed connections and components when power is present WARNING For Indoor Use Only Do not operate in wet damp environments to avoid electric shock Keep product surfaces dry and clean Do not operate in an explosive environment WARNING Do Not Operate With Suspected Failures If you suspect there is damage to this probe have it inspected by a qualified service person...

Page 37: ...tion This symbol indicates the Environmental Protection Use Period EPUP for the product s toxic substances for the China RoHS requirements The CE mark is a registered trademark of the European Community This product complies with the WEEE Directive 2002 96 EC marking requirements The affixed label indicates that you must not discard this electrical electronic product in domestic household waste Pr...

Page 38: ...38 N7020A and N7024A Power Rail Probes User s Guide 4 Safety and Regulatory Information ...

Page 39: ...mance how to connect the probe to the 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 ...

Page 40: ... least 20 minutes before any testing to allow the probe to warm up Connect the N7024A probe to an oscilloscope that has been powered on for at least 20 minutes to allow the oscilloscope to warm up before any testing Ensure that the environmental conditions do not exceed the probe s specified limits in Chapter 3 Specifications and Characteristics ...

Page 41: ...e impedance like that of a power rail The probes have 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 7 s...

Page 42: ...cy Figure 8 Input Impedance Versus Frequency Zin Measured Zin Modeled N7020A with N7022A Main Cable Minimize Probe Ground Impedance for the Best Signal Fidelity The N7020A and N7024A probes are single ended probes that are 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 vert...

Page 43: ... Connectors other than SMA such as SMB and SMC can be used with an appropriate adapter 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 The N7032A browser or N7033A browser with hand held probing As ...

Page 44: ...ollowing figure illustrates these connection methods and the correct combination of accessories to be used for the most accurate measurements These methods are described in the sections that follow NOTE The compatible Keysight oscilloscopes include S parameter correction for the supplied N7021A and N7022A cables Therefore you should always use these cables as per the combinations shown in the figu...

Page 45: ...ax and N7024A probe amp combination You can achieve the highest bandwidth configuration for the N7024A probe by connecting the N7022A main cable to an RF connector that connects to the DUT s power rail on a 50Ω line NOTE Once you have made the hardware connection using the appropriate probe connection accessory cables browsers ensure that the same hardware connection mechanism is reflected in the ...

Page 46: ...nimize intrusions into target systems The typical probing point will often be across a bypass capacitor with the cable s outside conductor soldered to ground 1 Connect the probe to the N7022A main cable 2 Connect the main cable to the N7021A pigtail cable 3 Use the supplied SMA adapter or Rotating adapter to connect the two cables 4 Solder the pigtail cable to the DUT Rotating adapter used to conn...

Page 47: ... pigtail cable to a DUT Figure 9 Soldering the Probing End of 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 ...

Page 48: ... each of these browsers N7023A Low Bandwidth Browser N7032A High Bandwidth Browser N7033A Fine Pitch High Bandwidth Browser N7032A N7033A Browser Use the N7022A main cable to connect the probe to the N7032A N7033A browser Use the supplied SMA adapter or Rotating adapter to make this connection between the probe and browser Hands free probing with N7032A N7033A browser For hands free stability you ...

Page 49: ...probe 2 Replace this cable with the N7023A browser cable to make the connection between the probe and browser 3 From the set of N7023A browser accessories choose the accessory that best suits your requirement as per the probing point on the DUT Connect this accessory to the browser tip as displayed in the figures below N7020A Probe N7023A Browser ...

Page 50: ...asy to vary the span between the input and ground to accommodate the device being probed Use the Ground Lead to reach grounding locations that are farther away from the probing location than can be reached by the ground spring However the longer lead means it has a larger inductance in the ground return path which corresponds to a lower performance than using the ground spring Ground Spring Ground...

Page 51: ...is dual lead adapter has no shorting hazards since all external metal surfaces are insulated Use the Micro SMD clips in conjunction with the dual lead adapter for fast and convenient hands free probing of surface mount capacitors It is a best practice to twist the leads of the dual lead adapter to reduce coupling of external noise into the probe Dual Lead Adapter Micro SMD Clip Dual Lead Adapter ...

Page 52: ...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 10 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 new tip can be ...

Page 53: ...SD protection when used 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 en...

Page 54: ...54 N7020A and N7024A Power Rail Probes User s Guide 5 Using the Power Rail Probe Figure 11 ESD Workstation ...

Page 55: ...n Types of Power Integrity Measurements The following are some of the common types of power integrity measurements that you can make using the N7020A N7024A probe Static and dynamic load response Figure 12 Example of Response to Changing Load Supply drift Programmable power rail response ...

Page 56: ...Using the Power Rail Probe High frequency transients and noise PARD Periodic and Random Disturbances such as noise ripple and switching transients on power rails Figure 13 Example of PARD on DC Output Product electrical validation at extended temperatures ...

Page 57: ...that 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 N7020A N7024A Probe s DC Attenuation Offset Calibration Using N7022A Main Cable N7020A N7024A Probe s DC Attenuation O...

Page 58: ...ration perform a user calibration 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 14 Calibration Setup 5 On the oscilloscope click Setup Probes 6 In the Probe Calibration dialog box select the...

Page 59: ...minutes 3 If the oscilloscope 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 ch...

Page 60: ...60 N7020A and N7024A Power Rail Probes User s Guide 6 Calibrating ...

Page 61: ...ance Plots N7020A Performance Plots 62 N7020A Input Impedance Equivalent Model 66 N7024A Performance Plots 68 N7024A Input Impedance Plots 70 This chapter includes plots that show the characteristic performance and an input impedance model of the N7020A and N7024A probes ...

Page 62: ...de 7 Performance Plots N7020A Performance Plots The performance characteristic plots in this section are for the N7020A probe with the N7022A main cable attached Figure 15 Normalized Frequency Response Vout Vin 2 5 GHz BW N7020A with N7022A Main Cable ...

Page 63: ...Performance Plots 7 N7020A and N7024A Power Rail Probes User s Guide 63 Figure 16 Frequency Response for Different DUT Impedances N7020A with N7022A Main Cable ...

Page 64: ... User s Guide 7 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 17 Step Tracking N7020A with N7022A Main Cable ...

Page 65: ...Performance Plots 7 N7020A and N7024A Power Rail Probes User s Guide 65 Figure 18 Input Impedance Versus Frequency Zin Measured Zin Modeled N7020A with N7022A Main Cable ...

Page 66: ... T_T5 N01614 GND 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 7...

Page 67: ...Performance Plots 7 N7020A and N7024A Power Rail Probes User s Guide 67 Figure 19 Input Impedance Equivalent Model ...

Page 68: ...ted the oscilloscope calculates a DSP correction filter that includes the probe head probe amplifier and oscilloscope channel This provides the maximum measurement accuracy for the complete probe and scope channel system Since there are different probe amplifiers and probe head combinations it is not reasonable to show the responses of all these combinations and the responses would all be very muc...

Page 69: ...Performance Plots 7 N7020A and N7024A Power Rail Probes User s Guide 69 Figure 20 Typical Corrected Frequency Response for the N7022A Main Cable and N7024A Probe Combination ...

Page 70: ... In this model the value of the inductance L varies for various supported probe configurations This value is provided with the input impedance plot of each of these probe configurations in this section Figure 21 Input Impedance Model for the N7024A Probe Input Impedance Plot for N7022A Main Cable and N7024A Probe Combination This combination supports the highest bandwidth configuration for the N70...

Page 71: ...Performance Plots 7 N7020A and N7024A Power Rail Probes User s Guide 71 Figure 22 Input Impedances Zin Modeled and Zin Measured for the N7022A Main Cable and N7024A Probe Combination ...

Page 72: ...024A Power Rail Probes User s Guide 7 Performance Plots Input Return Loss Plot for N7022A Main Cable and N7024A Probe Combination Figure 23 Input Return Loss Plot for the N7022A Main Cable and N7024A Probe Combina tion ...

Page 73: ...t Impedance Plot for N7021A Pigtail Cable N7022A Main Cable and N7024A Probe Combination In this combination the value of the inductance L is 1nH Figure 24 Input Impedances Zin Modeled and Zin Measured for the N7021A Pigtail Cable N7022A Main Cable and N7024A Probe Combination ...

Page 74: ...Input Impedance Plot for N7032A Browser N7022A Main Cable and N7024A Probe Combination In this combination the value of the inductance L is 1 85 nH Figure 25 Input Impedances Zin Modeled and Zin Measured for the N7032A Browser N7022A Main Cable and N7024A Probe Combination ...

Page 75: ... Input Impedance Plot for N7033A Browser N7022A Main Cable and N7024A Probe Combination In this combination the value of the inductance L is 1 5 nH Figure 26 Input Impedances Zin Modeled and Zin Measured for the N7033A Browser N7022A Main Cable and N7024A Probe Combination ...

Page 76: ...76 N7020A and N7024A Power Rail Probes User s Guide 7 Performance Plots ...

Page 77: ...erification 78 Bandwidth Performance Verification for N7024A Probe 81 CAUTION Electrostatic discharge ESD can quickly and imperceptibly damage or destroy high performance probes resulting in costly repairs Always wear a wrist strap when handling probe components and ensure that cables are discharged before being connected ...

Page 78: ...illoscope with the oscilloscope application maximized 3 Power on the DMM and select the 2 wire Ohm display on the DMM NOTE Allow the N7020A probe to warm up for at least 20 minutes Table 13 Required Test Equipment Test Equipment Critical Specification Keysight Model Number Oscilloscope Supported Oscilloscope Refer to the topic Oscilloscope Compatibility on page 16 to get a list of supported oscill...

Page 79: ... User s Guide 79 Figure 27 Test Setup 4 Read the DMM display for the input resistance 5 Record the result in Table 14 on page 80 To pass this test the result should be between 49 kΩ and 51 kΩ Performance Test Record Serial Date Tested by Recommended Next Test Date ...

Page 80: ...80 N7020A and N7024A Power Rail Probes User s Guide 8 Performance Verification Table 14 Input Impedance Test Results Test Limits Result Pass Fail 50 kΩ 2 ...

Page 81: ...to one of the input channels of the oscilloscope Table 15 Required Test Equipment Test Equipment Critical Specification Keysight Model Number Infiniium Oscilloscope Supported oscilloscope with bandwidth 8 GHz Refer to the Table 4 to get a list of supported oscilloscopes Precision BNC Adapter If V or Z series Infiniium oscilloscope with AutoProbe 2 inputs is being used N5442A Precision BNC M to SMA...

Page 82: ...se Setup Acquisition then select the Enabled checkbox for Averaging and set the of averages to 1024 7 Set timebase to 2ns div 8 Choose Setup Math Functions or Math Functions 9 In the Function dialog box select the tab of the function f1 to define it 10 From the Function 1 listbox select Math and then Differentiate NOTE Use the 3 5mm or 2 92mm SMA female to female adapters to make these connections...

Page 83: ... Pass and Align Phase checkbox 13 Select the tab of the function f2 to define it 14 From the Function 2 listbox select FFT 15 Turn the function display on for f2 by selecting the On checkbox 16 Set the source for f2 to Function 1 and close the Function dialog box The oscilloscope is configured as displayed in the figure below Figure 29 Oscilloscope s user interface as per the functions defined 17 ...

Page 84: ...e the frequency response of the coax cable by right clicking the f2 trace and saving it to memory 1 This will allow you to later compare the saved frequency response of the Cal Out step through the attached calibration coax cable with the frequency response of the N7024A probe done in steps that follow c For ease of comparison drag the memory 1 trace into the same window as the f2 trace Close the ...

Page 85: ...may need to use the N5442A adapter with the probe in case you are using a V series or a Z series oscilloscope Figure 31 Calibration setup with the N7024A probe and calibration cable c Choose Setup Probe Configuration d Select the tab of the oscilloscope s input channel to which the probe is connected e In the Probe Head block click Select Head Select Generic User Cable to configure the oscilloscop...

Page 86: ...e coax cable For comparison grab the f2 trace and align it with the memory 1 trace if needed as displayed in Figure 32 h The frequency response of the N7014A probe is the difference between the f2 trace and memory 1 trace Verify whether or not this difference is less than 3db at 6 GHz or below If it is less then the probe passes the test Notice that in the figure below the N7024A probe passed the ...

Page 87: ...tly the probe may not meet its bandwidth specification when used in combination with such a damaged cable In such situations it is recommended to verify whether or not the N7022A main cable is damaged using the procedure given below and replace the cable Prerequisites The following are the prerequisites before you start verifying if the N7022A cable is damaged The N7024A probe should have passed t...

Page 88: ...ble 4 Choose Setup Probe Configuration 5 Select the tab of the oscilloscope s input channel to which the probe is connected 6 In the Probe Head block click Select Head Select N7022A N7024A Main Cable to configure the oscilloscope to consider the nominal loss from the N7022A main cable Click OK and close the dialog 7 The f2 trace now has the frequency response with the N7024A probe attached to the ...

Page 89: ... true The difference between the f2 trace and memory 1 trace is more than 3db at 6 GHz or below The difference between the f2 trace and memory 1 trace is less than 3db at 6 GHz or below but the f2 trace is clearly different from the f2 trace displayed in the sample figure below Figure 34 Frequency response of the N7024A probe with the N7022A main cable ...

Page 90: ...90 N7020A and N7024A Power Rail Probes User s Guide 8 Performance Verification ...

Page 91: ...t impedance model 70 input resistance 27 31 inspecting 20 K Keysight Technologies contacting 24 M Mechanical Characteristics 27 32 N N7024A standard accessories 10 N7032A 11 N7033A 11 O orderable accessories 14 Orderable Parts 14 oscilloscope compatibility 16 P performance test record 79 87 probe cable care 7 cleaning 22 grounding 20 inspecting 20 service 23 Probe Calibration dialog box 58 probe t...

Page 92: ...92 N7020A and N7024A Power Rail Probes User s Guide Index ...

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