Keysight Technologies InfiniiMax III Series User Manual
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Keysight Technologies InfiniiMax III Series User Manual

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Keysight InfiniiMax III
Series Probes
User's Guide

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Summary of Contents for Keysight Technologies InfiniiMax III Series

  • Page 1 Keysight InfiniiMax III Series Probes User’s Guide...
  • Page 2 Notices Manual Part Number © Keysight Technologies, Inc. 2000 - 2014 no greater than Restricted Rights as defined in FAR 52.227-19(c)(1-2) (June 1987). U.S. No part of this manual may be reproduced in N2800-97010 Government users will receive no greater...

  • Page 3: Table Of Contents

    Contents Using InfiniiMax III Series Probes InfiniiMax III Probe Amplifiers Proper Handling Techniques InfiniiMax III and III+ Probing System Family Diagram N5477A Sampling Scope Adapter Cautions SPICE Models for N5440A, N5447A, N5441A, N5445A, and N5444A Probe Heads SPICE Models for N2838A and N2836A Probe Heads...
  • Page 4 Contents...

  • Page 5: Using Infiniimax Iii Series Probes

    Using InfiniiMax III Series Probes InfiniiMax III Probe Amplifiers Proper Handling Techniques InfiniiMax III and III+ Probing System Family Diagram N5477A Sampling Scope Adapter Cautions SPICE Models for N5440A, N5447A, N5441A, N5445A, and N5444A Probe Heads SPICE Models for N2838A and N2836A Probe Heads...

  • Page 6: Infiniimax Iii Probe Amplifiers

    1. Using InfiniiMax III Series Probes InfiniiMax III Probe Amplifiers InfiniiMax III Probe Amplifiers There are four InfiniiMax III amplifier models: • N2800A 16 GHz Probe Amplifier • N2801A 20 GHz Probe Amplifier • N2802A 25 GHz Probe Amplifier • N2803A 30 GHz Probe Amplifier Each probe amplifier is pre-loaded with its specific measured S-parameters.
  • Page 7 1. Using InfiniiMax III Series Probes InfiniiMax III Probe Amplifiers C A U T I O N If you select the wrong pairing of ZIF probe head and ZIF probe tip in the oscilloscope GUI’s probe menu, your waveforms will look incorrect.
  • Page 8 1. Using InfiniiMax III Series Probes InfiniiMax III Probe Amplifiers Figure 2 Clutches on an Infiniium 90000 X-series oscilloscope N O T E The clutches on the Infiniium 90000 X-series do not require a mechanical calibration. They will maintain the same tolerance as the Keysight torque wrench (8 in lbs ±1 in lbs).

  • Page 9: Proper Handling Techniques

    1. Using InfiniiMax III Series Probes Proper Handling Techniques Proper Handling Techniques This guide will assist you in properly handling your InfiniiMax III N2800A-series probes to prevent damage and maintain high performance. For more safe-handling information, go to www.keysight.com/find/scope-demo, click on See Keysight's probes in action, and then InfiniiMax III ESD Best Practices demo video listed under the Document Library tab.
  • Page 10 1. Using InfiniiMax III Series Probes Proper Handling Techniques Figure 3 Static-Safe Work Station Many scopes including Keysight's 90000X series have a front-panel ground socket. You can plug the wrist strap into the ground socket as seen in the following picture.
  • Page 11 1. Using InfiniiMax III Series Probes Proper Handling Techniques safety, the static-safe accessories must provide at least 1 MΩ of isolation from ground. Purchase acceptable ESD accessories from your local supplier. W A R N I N G These techniques for a static-safe work station should not be used when working on circuitry with a vol tage potential greater than 500 vol ts.
  • Page 12 1. Using InfiniiMax III Series Probes Proper Handling Techniques C A U T I O N When connecting a probe head to a probe amplifier, push straight in. When disconnecting a probe head from an amplifier, pull the probe head connectors straight out of the sockets.
  • Page 13 1. Using InfiniiMax III Series Probes Proper Handling Techniques Figure 5 Probe Improperly Disconnected from Oscilloscope while Probe Head is Connected to the Probe Amplifier Probing the DUT When making your measurements, you’ll often need to probe different locations on the DUT. You can safely move any of the following three...

  • Page 14: Infiniimax Iii And Iii+ Probing System Family Diagram

    1. Using InfiniiMax III Series Probes InfiniiMax III and III+ Probing System Family Diagram InfiniiMax III and III+ Probing System Family Diagram The following diagram shows the InfiniiMax III and InfiniiMax III+ probes and probe heads. The diagram is not drawn to scale.
  • Page 15 1. Using InfiniiMax III Series Probes InfiniiMax III and III+ Probing System Family Diagram C A U T I O N None of the N2800/1/2/3A probe amplifiers can withstand the extreme temperatures (–55°C to +150°C) that the N5450B can withstand. When using the N5450B extension cable, do not subject the InfiniiMax III probe amplifier to extreme temperatures.

  • Page 16: N5477A Sampling Scope Adapter

    1. Using InfiniiMax III Series Probes N5477A Sampling Scope Adapter N5477A Sampling Scope Adapter The N5477A Sampling Scope Adapter allows you to connect the InfiniiMax III probing system to the Infiniium 86100D DCA-X sampling oscilloscope or other RF instruments. Figure 7 N5477A InfiniiMax III Sampling Scope Adapter Connect the NMD/3.5 mm side of the adapter to one of the channel...

  • Page 17: Cautions

    1. Using InfiniiMax III Series Probes Cautions Cautions In addition to the CAUTION notices below, also refer to the CAUTION notices listed in each section of this book. C A U T I O N Electrostatic discharge (ESD) can quickly and imperceptibly damage or destroy high-performance probes, resulting in costly repairs.

  • Page 18: Spice Models For N5440A, N5447A, N5441A, N5445A, And N5444A Probe Heads

    1. Using InfiniiMax III Series Probes SPICE Models for N5440A, N5447A, N5441A, N5445A, and N5444A Probe Heads SPICE Models for N5440A, N5447A, N5441A, N5445A, and N5444A Probe Heads These are SPICE models for the input impedances of the various InfiniiMax III probes.
  • Page 19 1. Using InfiniiMax III Series Probes SPICE Models for N5440A, N5447A, N5441A, N5445A, and N5444A Probe Heads Figure 8 SPICE circuit to use for N5440A, N5447A, N5441A, N5445A, and N5444A probe heads The input impedance is only a function of the probe head; the amplifier...
  • Page 20 1. Using InfiniiMax III Series Probes SPICE Models for N5440A, N5447A, N5441A, N5445A, and N5444A Probe Heads N O T E You’ll find the following SPICE data on the documentation CD that was shipped with your probe. Copying this data from the CD is the simplest most reliable method to get the data.
  • Page 21 1. Using InfiniiMax III Series Probes SPICE Models for N5440A, N5447A, N5441A, N5445A, and N5444A Probe Heads N5441A Solder-In Probe .subckt N5441A_SldrIn 1 2 Head c1 1 10 50f l1 10 11 2.1n r1 11 2 65 rp1 1 3 65 lp1 3 4 2.5n...
  • Page 22 1. Using InfiniiMax III Series Probes SPICE Models for N5440A, N5447A, N5441A, N5445A, and N5444A Probe Heads N5445A Browser Probe .subckt N5445A_Brwsr2mmSpn 1 2 Head (2 mm span) c1 1 10 20f l1 10 11 2.3n r1 11 2 250 rp1 1 3 250 lp1 3 4 2.3n...
  • Page 23 1. Using InfiniiMax III Series Probes SPICE Models for N5440A, N5447A, N5441A, N5445A, and N5444A Probe Heads N5444A SMA Probe The N5444A 2.92 mm/3.5 mm/SMA probe head is modeled by 40 short transmission lines of varying impedance. This accurately models the Head temporal nature of this probe head.

  • Page 24: Spice Models For N2838A And N2836A Probe Heads

    1. Using InfiniiMax III Series Probes SPICE Models for N2838A and N2836A Probe Heads SPICE Models for N2838A and N2836A Probe Heads These are SPICE models for the input impedances of the various InfiniiMax III probes. Generic SPICE sub-circuit files are listed so they can be copied and pasted into user’s SPICE simulations.
  • Page 25 1. Using InfiniiMax III Series Probes SPICE Models for N2838A and N2836A Probe Heads N O T E You’ll find the following SPICE data on the documentation CD that was shipped with your probe. Copying this data from the CD is the simplest most reliable method to get the data.
  • Page 26 1. Using InfiniiMax III Series Probes SPICE Models for N2838A and N2836A Probe Heads N2836A Solder-In Probe .subckt N2836A_SldrIn 1 2 Head Cblkp 6 13 100n Cblkn 2 14 100n Cg1p 1 4 20.7f Cg1n 5 6 20.7f Cg2p 1 10 152.2f Cg2n 12 6 152.2f...

  • Page 27: Simplified Infiniimax Iii Schematic

    1. Using InfiniiMax III Series Probes Simplified InfiniiMax III Schematic Simplified InfiniiMax III Schematic N O T E Do not use this simplified schematic as a SPICE model.
  • Page 28 1. Using InfiniiMax III Series Probes Simplified InfiniiMax III Schematic...

  • Page 29: Infiniimax Iii Probe Heads

    InfiniiMax III Probe Heads N5445A InfiniiMax III Differential Browser Probe Head N2848A InfiniiMax III+ QuickTip InfiniiMode Probe Head N5439A InfiniiMax III ZIF (Zero Insertion Force) Probe Head N2836A InfiniiMax III Solder-in Probe Head N5441A InfiniiMax III Solder-in Probe Head N5444A InfiniiMax III 2.92 mm / 3.5 mm / SMA Probe Head This chapter documents the InfiniiMax III probe heads.

  • Page 30: N5445A Infiniimax Iii Differential Browser Probe Head

    2. InfiniiMax III Probe Heads N5445A InfiniiMax III Differential Browser Probe Head N5445A InfiniiMax III Differential Browser Probe Head Figure 10 N5445A InfiniiMax III Differential Browser Head The N5445A browser head (30 GHz) is the best choice for the general-purpose trouble shooting of differential signals with spring-loaded tips and variable spacing from 20 mil –...
  • Page 31 2. InfiniiMax III Probe Heads N5445A InfiniiMax III Differential Browser Probe Head Figure 11 Location of thumb wheel and definition of tip span You will need to tell the oscilloscope GUI what span you are using when calibrating the probe. To do this, set your span and then use the browser’s protective cap to measure which of the possible values your span most closely matches.
  • Page 32 2. InfiniiMax III Probe Heads N5445A InfiniiMax III Differential Browser Probe Head Figure 13 Proper Probe Handling C A U T I O N Do not apply side load to the browser. Figure 14 Improper Probe Handling C A U T I O N Do not apply too much force when browsing.
  • Page 33 2. InfiniiMax III Probe Heads N5445A InfiniiMax III Differential Browser Probe Head Tip 2. Use the N2787A 3D Probe Positioner to help in positioning the browser • First, lock the vertical compliance of the probe positioner • Clamp the browser into the positioner, aligning the browser’s slot with the positioners gripping pad •...
  • Page 34 2. InfiniiMax III Probe Heads N5445A InfiniiMax III Differential Browser Probe Head Replaceable Parts The following parts are replaceable: • N5476A replacement browser tips (qty. 4) • N5445-68700 replacement browser ground blades (qty. 4) • N5445-68701 replacement browser screws (qty. 4) Figure 16 Browser Tips and Ground Blade...

  • Page 35: N2848A Infiniimax Iii+ Quicktip Infiniimode Probe Head

    2. InfiniiMax III Probe Heads N2848A InfiniiMax III+ QuickTip InfiniiMode Probe Head N2848A InfiniiMax III+ QuickTip InfiniiMode Probe Head The N2848A QuickTip probe head is used with an N2849A QuickTip and together they provide the following advantages: • Easy-to-make secure magnetic mechanical connection between probe head and QuickTip.
  • Page 36 2. InfiniiMax III Probe Heads N2848A InfiniiMax III+ QuickTip InfiniiMode Probe Head Figure 17 Probing with the N2848A Probe Head and N2849A QuickTip C A U T I O N Do not replace or repair the N2849A QuickTip’s resistor or ground leads. Attempting to do so will damage the ability of the tip to mate with the N2848A probe head.
  • Page 37 2. InfiniiMax III Probe Heads N2848A InfiniiMax III+ QuickTip InfiniiMode Probe Head Connecting a QuickTip to Use the following tips when soldering the QuickTips to your DUT: the DUT • Orient the QuickTip vertically as shown in Figure 17 on page 36. •...

  • Page 38: N5439A Infiniimax Iii Zif (Zero Insertion Force) Probe Head

    2. InfiniiMax III Probe Heads N5439A InfiniiMax III ZIF (Zero Insertion Force) Probe Head N5439A InfiniiMax III ZIF (Zero Insertion Force) Probe Head Figure 18 N5439A InfiniiMax III ZIF Probe Head and N2838A/N5440A/N5447A ZIF Probe Tips The N5439A ZIF probe head provides 28 GHz bandwidth in an economical replaceable tip form factor.
  • Page 39 2. InfiniiMax III Probe Heads N5439A InfiniiMax III ZIF (Zero Insertion Force) Probe Head Using the ZIF Probe Tips There are three different models of ZIF probe tips: • N2838A 25 GHz PC board ZIF tips. Variable spacing from 5 mil – 250 mil (or 0.127 mm – 6.35 mm). N O T E The specifications and performance plots of the N2838A ZIF tip were measured with a nominal spacing of 40 mil (1 mm).
  • Page 40 2. InfiniiMax III Probe Heads N5439A InfiniiMax III ZIF (Zero Insertion Force) Probe Head N2838A N5447A N5440A These ZIF tips have different gold patterns Figure 19 Differentiating Between the N5440A and N5447A ZIF Tips These tips come in groups of five, with each tip being attached to the end of a plastic fork as shown in Figure 20.
  • Page 41 2. InfiniiMax III Probe Heads N5439A InfiniiMax III ZIF (Zero Insertion Force) Probe Head Soldering the ZIF Tips This is the recommended soldering procedure: Flux and tin the target DUT leads. Figure 21 Preparing the DUT Leads Form the ZIF tip wires to match the DUT’s pitch / angle (recommended to keep the ZIF tip in the plastic fork so it is easy to hold on to).
  • Page 42 2. InfiniiMax III Probe Heads N5439A InfiniiMax III ZIF (Zero Insertion Force) Probe Head Figure 23 Removing the Fork Handle from the ZIF Tip You can connect ZIF tips to any of the locations on a DUT that you need to probe and then move the ZIF probe head between them for quick, easy access to multiple probing locations.
  • Page 43 2. InfiniiMax III Probe Heads N5439A InfiniiMax III ZIF (Zero Insertion Force) Probe Head Figure 24 Using tack-putty to strain relieve a probe head and amplifier You can also use putty with a positioner, such as the Keysight N2787A. Figure 25 Using putty with the N2787A 3D Probe Positioner The same positioner can also be used to support your probe amplifier as shown in Figure 15...
  • Page 44 2. InfiniiMax III Probe Heads N5439A InfiniiMax III ZIF (Zero Insertion Force) Probe Head Figure 26 Using low-temperature hot glue to secure a probe head General Tips on Strain Relief Keep in mind that different accessories have different cable stiffness. You should choose a strain relief method appropriate for the cable stiffness.
  • Page 45 2. InfiniiMax III Probe Heads N5439A InfiniiMax III ZIF (Zero Insertion Force) Probe Head After the probe head is connected to the soldered ZIF tip, it should look similar to the following: Figure 28 ZIF probe head connected to a soldered ZIF tip N O T E Please note in the solder procedure that you were instructed to have the gold traces on the ZIF tip facing up.
  • Page 46 2. InfiniiMax III Probe Heads N5439A InfiniiMax III ZIF (Zero Insertion Force) Probe Head C A U T I O N Always use the lever when inserting or removing ZIF tips. Replaceable Parts • N5439-65201 Strain Relief Putty • N2838A 25 GHz PC board ZIF tips (qty. 5) •...

  • Page 47: N2836A Infiniimax Iii Solder-In Probe Head

    2. InfiniiMax III Probe Heads N2836A InfiniiMax III Solder-in Probe Head N2836A InfiniiMax III Solder-in Probe Head The N2836A InfiniiMax III solder-in probe head is an economical semi-permanent connection that provides up to 26 GHz of system bandwidth. Figure 30 N2836A InfiniiMax III solder-in probe head Variable span of the leads ranges from 5 mil - 250 mil (0.127 mm - 6.35 mm).
  • Page 48 2. InfiniiMax III Probe Heads N2836A InfiniiMax III Solder-in Probe Head N O T E The specifications and performance plots of the N2836A solder-in probe head were measured with a nominal spacing of 40 mil (1 mm). In order to achieve the proper response (as shown in the performace plots), you need to keep the mini-axial lead bodies roughly parallel and use the tip wires on the mini-axial leads to get the desired span.
  • Page 49 2. InfiniiMax III Probe Heads N2836A InfiniiMax III Solder-in Probe Head Replacing Axial Resistors The 130 ohm axial resistors at the tip of the N2836A solder-in probe head or the N2838A ZIF tip can be replaced when they are worn out or on the N2836A Solder-in damaged.
  • Page 50 2. InfiniiMax III Probe Heads N2836A InfiniiMax III Solder-in Probe Head Tweezers Figure 31 Clamping the solder-in probe or ZIF tip Make sure soldering iron tip is free of excess solder. Grab each resistor lead or body with tweezers and pull very gently up. Touch the soldering iron to solder joint just long enough for the resistor to come free of the probe head tip.
  • Page 51 2. InfiniiMax III Probe Heads N2836A InfiniiMax III Solder-in Probe Head This solder joint has very low thermal mass so it should not take very long for the joint to melt and release. Excessive dwell time with the iron will permanently damage the flip-chip resistor.
  • Page 52 2. InfiniiMax III Probe Heads N2836A InfiniiMax III Solder-in Probe Head Figure 33 Trimming axial resistor leads The lead to be attached to tip pc board will have a 90 degree bend to go into through hole in the tip pc board. The orientation of the lead is not important.
  • Page 53 2. InfiniiMax III Probe Heads N2836A InfiniiMax III Solder-in Probe Head Figure 35 Soldering in a new axial resistor Touch the soldering iron to the side of the hole. When the solder in the hole melts, the resistor lead will fall into the hole. Remove the soldering iron as soon as the lead falls into the hole.

  • Page 54: N5441A Infiniimax Iii Solder-In Probe Head

    2. InfiniiMax III Probe Heads N5441A InfiniiMax III Solder-in Probe Head N5441A InfiniiMax III Solder-in Probe Head The N5441A InfiniiMax III solder-in probe head is an economical semi-permanent connection that provides up to 16 GHz of system bandwidth. Variable span of the leads ranges from 5 mil - 80 mil (0.127 mm - 2 mm).
  • Page 55 2. InfiniiMax III Probe Heads N5441A InfiniiMax III Solder-in Probe Head Replacing Wires on the The N5441A solder-in probe head’s tip wires can be replaced when they are worn out or damaged. 0.005” and 0.007” wire kits are included with N5441A Solder-in Probe each probe head.
  • Page 56 2. InfiniiMax III Probe Heads N5441A InfiniiMax III Solder-in Probe Head Figure 39 Adding Solder and Flux Reflow the solder from the underside and insert a new piece of wire. It is best to shape the wire into an “L” before attempting to insert. C A U T I O N Try not to d well with the iron in contact with the probe head.
  • Page 57 2. InfiniiMax III Probe Heads N5441A InfiniiMax III Solder-in Probe Head Trim any wire stubs on the probe head underside. Figure 42 Trim Wire Stubs Use the included trim gauge to cut the wire lengths. Doing so will ensure the best performance from your probe head. Figure 43 Trim Guage Placed on Wires Figure 44 Removing Excess Wire Check the DC resistance of each probe leg when you have replaced...
  • Page 58 2. InfiniiMax III Probe Heads N5441A InfiniiMax III Solder-in Probe Head Soldering the N2836A or To solder the N2836A or N5441A solder-in probe head to your DUT, complete the following steps (the procedure is very similar to that for the N5441A InfiniiMax III ZIF probe tips used with the N5439A probe head): Solder-in Probe Heads...
  • Page 59 2. InfiniiMax III Probe Heads N5441A InfiniiMax III Solder-in Probe Head C A U T I O N Do not leave the iron in contact with the probe head for more than a few seconds at a time. Figure 48 Positioning Wires Strain Relieving the High-performance probes have small physical geometries to ensure the lowest possible loading and best electrical response.
  • Page 60 2. InfiniiMax III Probe Heads N5441A InfiniiMax III Solder-in Probe Head You can also use putty with a positioner, such as the Keysight N2787A. Figure 50 Using putty with the N2787A 3D Probe Positioner The same positioner can also be used to support your probe amplifier as shown in Figure 15 on page 33.
  • Page 61 2. InfiniiMax III Probe Heads N5441A InfiniiMax III Solder-in Probe Head Replaceable Parts Extra wire (for solder-in probe head only). 01169-81301 (7 mil), 01169-21306 (5 mil) N5439-65201 Strain Relief Putty...

  • Page 62: N5444A Infiniimax Iii 2.92 Mm / 3.5 Mm / Sma Probe Head

    2. InfiniiMax III Probe Heads N5444A InfiniiMax III 2.92 mm / 3.5 mm / SMA Probe Head N5444A InfiniiMax III 2.92 mm / 3.5 mm / SMA Probe Head The N5444A InfiniiMax III 2.92mm/3.5mm/SMA probe head provides 28 GHz bandwidth and allows you to connect two 2.92mm, 3.5mm, or SMA cables to make a differential measurement on a single oscilloscope channel.
  • Page 63 2. InfiniiMax III Probe Heads N5444A InfiniiMax III 2.92 mm / 3.5 mm / SMA Probe Head Figure 53 N5444A Probe Head With N5448A Head Flex Cables Attached Replaceable Parts N5448A. 2.92mm Extension Cables...
  • Page 64 2. InfiniiMax III Probe Heads N5444A InfiniiMax III 2.92 mm / 3.5 mm / SMA Probe Head...

  • Page 65: Performance Specifications / Characteristics

    Performance Specifications / Characteristics The InfiniiMax III series probe amplifiers and probe heads are designed to be used within the temperature range of the 90000-X series oscilloscope. The only exception is the N5441A solder-in probe head. The N5441A solder-in probe head temperature range is from –55°C to +150°C for up to 250 test cycles.
  • Page 66 3. Performance Specifications / Characteristics Table 3 N2803A Amplifier with N2836A, N5441A, and N2848A Probe Heads N2836A N5441A N2848A QuickTip Head Specifications / Characteristics Solder-In Solder-In) with N2849A Tip Probe Band width 27 GHz (typical) 17.2 GHz (typical) 16 GHz (typical) (–3 dB), Probe Only Rise and Fall Time, Probe Only 21.1 ps (10-90%)
  • Page 67 3. Performance Specifications / Characteristics Table 4 N2803A Amplifier with N2838A, N5447A, and N5440A ZIF Tips N5439A ZIF Probe Head N5447A N2838A N5440A High Sensitivity Ceramic Specifications / Characteristics PC Board ZIF Tip Ceramic ZIF Tip ZIF Tip Probe Band width 25 GHz (typical) 28 GHz (typical), 28 GHz (typical)
  • Page 68 3. Performance Specifications / Characteristics Table 5 N2803A Amplifier with N5444A and N5445A Probe Heads N5444A N5445A Specifications / Characteristics SMA, 3.5 mm, 2.92 mm Adapter Browser Probe Band width 28 GHz (typical) 30 GHz (typical), (–3 dB), Probe Only 28 GHz warranted Rise and Fall Time, Probe Only 15.5 ps (10-90%)

  • Page 69: Calibration / Deskew Procedure

    Calibration / Deskew Procedure To perform a calibration/deskew for the InfiniiMax III Probing system, you will be using the N5443A Calibration/Deskew Fixture. This fixture enables you to not only calibrate / deskew your InfiniiMax III probe, but it also ensures you properly position the probe amplifier during the procedure via the plastic holder.

  • Page 70: Procedure

    4. Calibration / Deskew Procedure Procedure Procedure To perform a DC calibration / calibrated skew, make sure the 50 ohm terminator (included with N5443A) is connected to the fixture as shown below. Hold the N5443A upright and connect the fixture to the Cal Out on the oscilloscope.
  • Page 71 4. Calibration / Deskew Procedure Procedure Connect the probe amplifier to one of the channel inputs on the oscilloscope. Insert the amplifier into the top of the fixture holder. The amplifier can slide up and down in the holder to adjust the probe head position. C A U T I O N Al ways wear an ESD wrist strap when working with active probes.
  • Page 72 4. Calibration / Deskew Procedure Procedure Or form the wires as shown below if using the N5441A solder-in probe head. If you are using the browser probe head then you do not need to adjust the shape of the tips. Connect your probe head to the amplifier.
  • Page 73 4. Calibration / Deskew Procedure Procedure Press the Menu button on the probe amplifier to bring up the Probe Setup dialog box on the oscilloscope. In the Probe Setup dialog box, click on the Calibrate Probe ... button. This will open the Probe Calibration dialog box. In the Probe Calibration dialog box, select the probe head you are using in the Head Label (Type) field, select the Calibrated Atten/Offset radio button, and press the Start Atten/Offset Calibration...
  • Page 74 4. Calibration / Deskew Procedure Procedure A dialog box will then open that tells you how to connect the probe head to the calibration/deskew fixture. The fixture has three spring-loaded fingers (shown below) that clamp probe head wires to the fixture if you are using the ZIF probe head or the Solder-in probe head.
  • Page 75 4. Calibration / Deskew Procedure Procedure C A U T I O N NEVER solder a probe tip to the thickfilm gold. The gold will immediately dissolve into the solder and disappear. Follow the instructions on the oscilloscope to clamp the wires to either the signal or ground.
  • Page 76 4. Calibration / Deskew Procedure Procedure With the probe head correctly connected to the fixture, press OK in the dialog box on the oscilloscope and wait for the calibration to finish. It will report whether the calibration was successful or not. Once the calibration has successfully completed, the DC Cal LED on the probe amplifier will turn green indicating that the particular combination of probe amplifier, probe head, and oscilloscope channel...

  • Page 77: Performance Verification

    Performance Verification Band width Performance Verification DC Input Resistance Performance Verification Performance Test Record This chapter describes the equipment and procedures needed to verify the performance of InfiniiMax III probes. Due to the very high frequency of the InfiniiMax III probing system, it is important to carefully adhere to the techniques and procedures described in this chapter to accurately measure the performance.

  • Page 78: Bandwidth Performance Verification

    5. Performance Verification Bandwidth Performance Verification Bandwidth Performance Verification This section documents the bandwidth performance of the N2803A InfiniiMax III Probe Amplifier with the N5439A ZIF probe head and N5440A ceramic ZIF tip or with the N5445A browser probe head. Keysight recommends a test interval of one year or 2000 hours of operation.
  • Page 79 5. Performance Verification Bandwidth Performance Verification • IF BW: 1 kHz. • Test port cables and adaptors (if needed) to provide male 2.92 mm connectors at measurement planes. • Install the BNC 50 ohm terminator to the bias input for port 1 of the VNA (on the rear panel of E8361 PNA).
  • Page 80 5. Performance Verification Bandwidth Performance Verification Figure 55 Setup for measuring “Vin” of probe Connect the N5477A AutoProbe II adaptor to the 1143A power supply and turn on the power supply. Make sure the probe offset control button on the 1143A is set to “Zero”...
  • Page 81 5. Performance Verification Bandwidth Performance Verification Figure 56 shows a close up of the tip wires positioned under the pinchers. Ideally the probe head should not be angled toward the port 2 side of the PV fixture, but a slight angle of 5 degrees is acceptable. If angled too much, the measured BW of the probe will be degraded due to coupling from the trace to the probe tip.
  • Page 82 5. Performance Verification Bandwidth Performance Verification Figure 57 De-embedded “Vin” trace Now move the 2.92 mm male test port 1 connector to the 5062_1247 adapter and N5477A Autoprobe II adapter assembly. Connect the Maury Microwave 8775B2 2.92 mm male broadband load to the 1250_1749 adaptor and N5443A PV fixture assembly.
  • Page 83 5. Performance Verification Bandwidth Performance Verification should be approximately -15.3 dB, but can vary a few tenths of a dB either way. Display should look like Figure 59. If it looks noticeably different, the probe tip wires may not be making contact under the pinchers. Figure 58 Setup to measure “Vout”...
  • Page 84 5. Performance Verification Bandwidth Performance Verification Figure 59 De-embedded “Vout” trace Under menu “Trace/Math/Memory” select “Data/Memory” in the “Data Math” box. This will divide the current trace (de-embedded vout trace) by the memory trace (de-embedded vin trace) and therefore show the voltage transfer function of the probe or “vout/vin”.
  • Page 85 5. Performance Verification Bandwidth Performance Verification N O T E You only need to perform the Bandwidth Performance Verification test with the ZIF tip as described above. If the probe passes with the ZIF probe head then it will pass with the browser probe head as well.
  • Page 86 5. Performance Verification Bandwidth Performance Verification Figure 61 N2787A 3D Probe Positioner used to measure the N5445A browser with the N2803A amp...
  • Page 87 5. Performance Verification Bandwidth Performance Verification Touchstone File Cut and paste the following text and save in a text file named Adapter_1250_1749___OutputSideOfFixture_N5443A.s2p. This file is used in (1250-1749 & N5443A) Step 7 on page 81. N O T E You’ll find the following data on the Adobe AIR version of the Probe Resource Center (PRC).
  • Page 88 5. Performance Verification Bandwidth Performance Verification 234187649.242808 -51.933827 29.735652 -0.051672 -19.458329 -0.050622 -19.511235 -52.618817 43.686630 239647472.312564 -52.501771 27.821456 -0.050415 -19.931623 -0.050130 -19.975167 -53.656204 40.914797 245234585.049599 -51.831039 34.835393 -0.052075 -20.398897 -0.050775 -20.408282 -54.529939 34.582488 250951955.070115 -51.206936 39.614303 -0.053717 -20.877562 -0.050675 -20.855888 -54.904078 27.538703 256802619.176963 -50.965190 28.605202 -0.054066 -21.375945 -0.046274 -21.351120 -52.552449 17.284825 262789684.972659 -50.758459 28.217659 -0.053702 -21.875920 -0.045857 -21.868062 -51.711832 15.564753 268916332.509994 -50.587835 40.516894 -0.052486 -22.375796 -0.050221 -22.408982 -52.202077 23.079380...
  • Page 89 5. Performance Verification Bandwidth Performance Verification 1514544666.344010 -34.182262 -87.576024 -0.156786 -125.682377 -0.148638 -125.705803 -43.408595 145.144573 1549854581.005252 -33.860562 -89.317043 -0.159620 -128.583658 -0.151584 -128.632751 -42.575215 145.798996 1585987706.827638 -33.879884 -90.737689 -0.160755 -131.597325 -0.154725 -131.631979 -43.172777 140.875243 1622963236.058510 -33.429276 -94.739265 -0.163689 -134.669991 -0.157934 -134.692000 -43.227570 129.498215 1660800808.390988 -33.329643 -99.088811 -0.168803 -137.806336 -0.161831 -137.822013 -41.965972 120.296582 1699520521.395668 -33.017248 -104.260619 -0.168570 -141.018492 -0.160178 -141.044358 -40.920686 110.637802 1739142941.195521 -32.875921 -105.450952 -0.171025 -144.279383 -0.166273 -144.317413 -40.643020 104.699352...
  • Page 90 5. Performance Verification Bandwidth Performance Verification 9794904017.217421 -27.784409 -102.254518 -0.413424 -92.036107 -0.405178 -92.065913 -29.288726 106.168277 10023261247.379461 -29.946849 -113.393625 -0.415196 -110.952968 -0.410031 -111.004263 -32.941982 80.431768 10256942370.912546 -33.467963 -111.933273 -0.416094 -130.366719 -0.415555 -130.393886 -39.546464 35.419669 10496071508.435085 -35.844062 -83.069634 -0.425423 -150.213792 -0.418926 -150.256785 -39.552620 -88.456959 10740775674.298862 -31.594934 -55.582996 -0.430726 -170.525020 -0.427623 -170.564105 -31.250912 -133.959009 10991184844.053186 -27.345484 -58.704648 -0.440006 168.685369 -0.439718 168.630262 -26.639771 -161.126596 11247432023.481905 -24.270939 -69.126451 -0.456322 147.439024 -0.449060 147.371764 -23.920976 172.437459...
  • Page 91 5. Performance Verification Bandwidth Performance Verification Touchstone File Cut and paste the following text and save in an text file named Adapter_5062_1247___Adapter_N5477A.s2p. This file is used in Step 11 (5062-1247 & N5477A) page 82. N O T E You’ll find the following data on the Adobe AIR version of the Probe Resource Center (PRC).
  • Page 92 5. Performance Verification Bandwidth Performance Verification 234187649.242808 -43.220494 -13.782799 -0.048034 -46.165690 -0.048709 -46.130118 -43.467676 -0.011936 239647472.312564 -43.241824 -14.723367 -0.048307 -47.236959 -0.048861 -47.196599 -43.438192 -1.671516 245234585.049599 -43.263706 -15.685864 -0.048586 -48.333203 -0.049017 -48.287944 -43.408123 -3.369787 250951955.070115 -43.298238 -16.681585 -0.048993 -49.454987 -0.049206 -49.405483 -43.377204 -5.024058 256802619.176963 -43.396132 -17.755774 -0.050025 -50.602831 -0.049547 -50.552919 -43.344372 -6.288675 262789684.972659 -43.497464 -18.855007 -0.051082 -51.777436 -0.049897 -51.727106 -43.310903 -7.582776 268916332.509994 -43.602397 -19.979867 -0.052164 -52.979426 -0.050255 -52.928669 -43.276786 -8.907047...
  • Page 93 5. Performance Verification Bandwidth Performance Verification 1514544666.344010 -34.643457 -29.986157 -0.122249 63.000175 -0.116477 63.018015 -34.287376 -58.019144 1549854581.005252 -34.701874 -37.252563 -0.123607 56.083312 -0.114573 56.121837 -34.665369 -64.847296 1585987706.827638 -34.940988 -43.789507 -0.125267 49.005325 -0.120758 49.033538 -35.311198 -71.187679 1622963236.058510 -35.177903 -51.089352 -0.126841 41.765457 -0.122050 41.783984 -35.768420 -76.621331 1660800808.390988 -35.519415 -58.935770 -0.127939 34.360688 -0.122292 34.376234 -36.321763 -81.158578 1699520521.395668 -36.162343 -66.946802 -0.127949 26.788233 -0.127886 26.816887 -37.579532 -84.863400 1739142941.195521 -36.477155 -69.887985 -0.126770 19.003829 -0.125188 19.039695 -38.607203 -90.124304...
  • Page 94 5. Performance Verification Bandwidth Performance Verification 9794904017.217421 -35.866841 -16.830593 -0.297243 -118.070354 -0.295732 -118.017380 -34.561003 -43.260195 10023261247.379461 -40.371336 -58.565056 -0.299652 -162.808725 -0.298000 -162.714229 -35.356462 -128.009378 10256942370.912546 -47.858119 8.883051 -0.301757 151.432559 -0.301873 151.505185 -34.497053 135.597672 10496071508.435085 -36.622941 4.554259 -0.307021 104.591699 -0.306216 104.665149 -31.849678 54.509330 10740775674.298862 -32.971346 -43.725031 -0.310831 56.700025 -0.310562 56.745140 -31.110504 -17.560468 10991184844.053186 -34.021301 -98.567108 -0.311071 7.658483 -0.313540 7.726542 -33.136970 -86.070846 11247432023.481905 -39.993838 -168.509597 -0.310230 -42.516342 -0.312171 -42.442511 -41.798286 171.688717...

  • Page 95: Dc Input Resistance Performance Verification

    5. Performance Verification DC Input Resistance Performance Verification DC Input Resistance Performance Verification Keysight recommends a test interval of one year or 2000 hours of operation. Equipment Needed • Keysight N5443A Performance Verification Fixture • No substitute • BNC(m) to SMA(m) Adapter •...
  • Page 96 5. Performance Verification DC Input Resistance Performance Verification Measuring Input Figure 62 shows the correct setup for measuring the differential input resistance for ZIF probe heads or the solder-in probe head. Resistance for ZIF Probe Heads or Solder-in Probe Heads Figure 62 Measuring the differential input resistance of a ZIF or solder-in probe head Connect the BNC to SMA adapter and BNC to Banana Plug adapters...
  • Page 97 5. Performance Verification DC Input Resistance Performance Verification Figure 63 Measuring the single-ended input resistance of a ZIF or solder-in probe head...
  • Page 98 5. Performance Verification DC Input Resistance Performance Verification Measuring Input The following image shows the correct setup for measuring the differential input resistance of the N5445A Browser probe head Resistance for the (Figure 64). Browser Probe Head Figure 64 Setup for Measuring Input Resistance for Browser Probe Head Set the browser for a fairly wide span (span does not impact this DC measurement).

  • Page 99: Performance Test Record

    5. Performance Verification Performance Test Record Performance Test Record N O T E The recommended test interval is 1 Year/2000 hours. Keysight Technologies Keysight InfiniiMax III Series Probe Model Number: Tested by: Serial Number: Work Order Number: Recommended next test date:...
  • Page 100 5. Performance Verification Performance Test Record...

  • Page 101: Performance Plots

    Performance Plots N2836A 26 GHz Solder-In Head (with N2803A) 103 N2838A/N5439A 25 GHz PCB ZIF Tip/Head (with N2803A) 106 N5440A/N5439A 28 GHz Ceramic ZIF Tip/Head (with N2803A) 109 N5447A/N5439A 28 GHz Ceramic High-Sensitivity ZIF Tip/Head (with N2803A) 112 N5441A 16 GHz Solder-In Head (with N2803A) 115 N5444A 28 GHz SMA 2.92 mm Head (with N2803A) 118 N5445A 30 GHz Browser Head, 1 mm span (with N2803A) 120 N5445A 30 GHz Browser Head, 2 mm span (with N2803A) 123...
  • Page 102 6. Performance Plots • Since InfiniiMax III probes can be used with instruments that do not apply probe correction, the plots below show the response of a typical probe head and typical probe amp with no probe correction (i.e. probe hardware only) as well as the response with probe correction based on the nominal probe head s parameters and measured probe amp s parameters.

  • Page 103: N2836A 26 Ghz Solder-In Head (With N2803A)

    6. Performance Plots N2836A 26 GHz Solder-In Head (with N2803A) N2836A 26 GHz Solder-In Head (with N2803A)
  • Page 104 6. Performance Plots N2836A 26 GHz Solder-In Head (with N2803A)
  • Page 105 6. Performance Plots N2836A 26 GHz Solder-In Head (with N2803A)

  • Page 106: N2838A/N5439A 25 Ghz Pcb Zif Tip/Head (With N2803A)

    6. Performance Plots N2838A/N5439A 25 GHz PCB ZIF Tip/Head (with N2803A) N2838A/N5439A 25 GHz PCB ZIF Tip/Head (with N2803A)
  • Page 107 6. Performance Plots N2838A/N5439A 25 GHz PCB ZIF Tip/Head (with N2803A)
  • Page 108 6. Performance Plots N2838A/N5439A 25 GHz PCB ZIF Tip/Head (with N2803A)

  • Page 109: N5440A/N5439A 28 Ghz Ceramic Zif Tip/Head (With N2803A)

    6. Performance Plots N5440A/N5439A 28 GHz Ceramic ZIF Tip/Head (with N2803A) N5440A/N5439A 28 GHz Ceramic ZIF Tip/Head (with N2803A)
  • Page 110 6. Performance Plots N5440A/N5439A 28 GHz Ceramic ZIF Tip/Head (with N2803A)
  • Page 111 6. Performance Plots N5440A/N5439A 28 GHz Ceramic ZIF Tip/Head (with N2803A)

  • Page 112: N5447A/N5439A 28 Ghz Ceramic High-Sensitivity Zif Tip/Head (With N2803A)

    6. Performance Plots N5447A/N5439A 28 GHz Ceramic High-Sensitivity ZIF Tip/Head (with N2803A) N5447A/N5439A 28 GHz Ceramic High-Sensitivity ZIF Tip/Head (with N2803A)
  • Page 113 6. Performance Plots N5447A/N5439A 28 GHz Ceramic High-Sensitivity ZIF Tip/Head (with N2803A)
  • Page 114 6. Performance Plots N5447A/N5439A 28 GHz Ceramic High-Sensitivity ZIF Tip/Head (with N2803A)

  • Page 115: N5441A 16 Ghz Solder-In Head (With N2803A)

    6. Performance Plots N5441A 16 GHz Solder-In Head (with N2803A) N5441A 16 GHz Solder-In Head (with N2803A)
  • Page 116 6. Performance Plots N5441A 16 GHz Solder-In Head (with N2803A)
  • Page 117 6. Performance Plots N5441A 16 GHz Solder-In Head (with N2803A)

  • Page 118: N5444A 28 Ghz Sma 2.92 Mm Head (With N2803A)

    6. Performance Plots N5444A 28 GHz SMA 2.92 mm Head (with N2803A) N5444A 28 GHz SMA 2.92 mm Head (with N2803A)
  • Page 119 6. Performance Plots N5444A 28 GHz SMA 2.92 mm Head (with N2803A)

  • Page 120: N5445A 30 Ghz Browser Head, 1 Mm Span (With N2803A)

    6. Performance Plots N5445A 30 GHz Browser Head, 1 mm span (with N2803A) N5445A 30 GHz Browser Head, 1 mm span (with N2803A)
  • Page 121 6. Performance Plots N5445A 30 GHz Browser Head, 1 mm span (with N2803A)
  • Page 122 6. Performance Plots N5445A 30 GHz Browser Head, 1 mm span (with N2803A)

  • Page 123: N5445A 30 Ghz Browser Head, 2 Mm Span (With N2803A)

    6. Performance Plots N5445A 30 GHz Browser Head, 2 mm span (with N2803A) N5445A 30 GHz Browser Head, 2 mm span (with N2803A)
  • Page 124 6. Performance Plots N5445A 30 GHz Browser Head, 2 mm span (with N2803A) N O T E For browser spans of 2 and 3mm, the biggest effect is in the frequency and time responses. The input loading is nearly the same as for the 1mm span except that the impedance minimum at ~22 GHz is slightly higher.

  • Page 125: N5445A 30 Ghz Browser Head, 3 Mm Span (With N2803A)

    6. Performance Plots N5445A 30 GHz Browser Head, 3 mm span (with N2803A) N5445A 30 GHz Browser Head, 3 mm span (with N2803A)
  • Page 126 6. Performance Plots N5445A 30 GHz Browser Head, 3 mm span (with N2803A) N O T E For browser spans of 2 and 3mm, the biggest effect is in the frequency and time responses. The input loading is nearly the same as for the 1mm span except that the impedance minimum at ~22 GHz is slightly higher.
  • Page 127 Index Numerics N5447A ceramic high sensitivity ZIF tip, 6, N5448A 2.92 mm head flex cables, 1143A power supply, ground socket, N5450B extreme temperature extension 86100D DCA-X sampling oscilloscope, cable, 14, 54, N5477A sampling scope adapter, 7, Input resistance, 66, 67, accessories isolation, static-safe,...
  • Page 128 Tack-putty, 42, wrist-strap, ZIF Probe Head, connecting, ZIF tip, soldering,...

This manual is also suitable for:

N2800aN2801aN2802aN2803a

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