1. Manuals
  2. Brands
  3. Keysight Manuals
  4. Measuring Instruments
  5. N2800A
  6. User manual

Keysight N2800A User Manual

Keysight n2800a series infiniimax iii series probing system
Hide thumbs
Table of Contents

Advertisement

Quick Links

Keysight N2800A Series
Differential InfiniiMax III Probes
User's Guide

Advertisement

Table of Contents
loading

Related Manuals for Keysight N2800A

Summary of Contents for Keysight N2800A

  • Page 1 Keysight N2800A Series Differential InfiniiMax III Probes User’s Guide...

  • Page 2: Safety Notices

    Accordingly, Keysight provides the Software to U.S. govern- Manual Part Number adhered to, could result in damage ment customers under its standard commercial...

  • Page 3: Table Of Contents

    Contents 1 Using InfiniiMax III Series Probes InfiniiMax III Probe Amplifiers InfiniiMax III and III+ Probing System Family Diagram Proper Handling Techniques N5477A Sampling Scope Adapter Cautions 2 InfiniiMax III Probe Heads N5445A InfiniiMax III Differential Browser Probe Head N2848A InfiniiMax III+ QuickTip InfiniiMode Probe Head N5439A InfiniiMax III ZIF Probe Head N2836A InfiniiMax III Solder-in Probe Head N5441A InfiniiMax III Solder-in Probe Head...
  • Page 4 N5444A 30 GHz SMA 2.92 mm Head (with N2803A) N5445A 30 GHz Browser Head, 1 mm span (with N2803A) N5445A 30 GHz Browser Head, 2 mm span (with N2803A) N5445A 30 GHz Browser Head, 3 mm span (with N2803A) 8 SPICE Models SPICE Models for N5440/1/4/5/7A Probe Heads SPICE Models for N2838A and N2836A Probe Head Simplified InfiniiMax III Schematic...

  • Page 5: Using Infiniimax Iii Series Probes

    Keysight InfiniiMax III Series Probes User’s Guide 1 Using InfiniiMax III Series Probes InfiniiMax III Probe Amplifiers InfiniiMax III and III+ Probing System Family Diagram Proper Handling Techniques N5477A Sampling Scope Adapter Cautions This chapter contains documentation on using the InfiniiMax III probing system.

  • Page 6: Infiniimax Iii Probe Amplifiers

    Using InfiniiMax III Series Probes 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 To disconnect the probe amplifier, loosen the clutch on the oscilloscope input and disconnect the probe amplifier. If you are using an InfiniiMax III probe amplifier with Keysight’s 86100D sampling oscilloscope, you will need to use the N5477A sampling scope adapter.
  • Page 8 The clutches on the Infiniium 90000 X-series do not require a mechanical calibration. They will maintain N OT E the same tolerance as the Keysight torque wrench (8 in lbs ±1 in lbs). Probe Amplifier Bandwidth Upgrades The InfiniiMax III probe amplifiers are upgradeable. When you order a probe bandwidth upgrade, you receive a new probe with a new model number and new serial number.

  • Page 9: Infiniimax Iii And Iii+ Probing System Family Diagram

    Using InfiniiMax III Series Probes 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. Figure 3 InfiniiMax III / III+ Probing System InfiniiMax III Series Probes User’s Guide...
  • Page 10 Using InfiniiMax III Series Probes For extreme temperature testing, use the N5450B InfiniiMax extreme temperature extension cable with the N5441A solder-in head. The N5441A can withstand temperatures from –55°C to +150°C for up to 250 test cycles. None of the N2800/1/2/3A probe amplifiers can withstand the extreme temperatures (–55°C CAUTION to +150°C) that the N5450B can withstand.

  • Page 11: Proper Handling Techniques

    Using InfiniiMax III Series Probes 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 12 Using InfiniiMax III Series Probes Figure 4 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. Figure 5 Wrist Strap Connected to Oscilloscope Ground Socket...
  • Page 13 DUT ground to the oscilloscope ground. An example of a device having a floating ground would be a battery-powered DUT. Attach the probe head to the DUT. At this point, the N2800A-series probe amplifier must not be connected to the oscilloscope or CAUTION the probe head.
  • Page 14 Using InfiniiMax III Series Probes When connecting a probe head to a probe amplifier, push straight in. When disconnecting a CAUTION probe head from an amplifier, pull the probe head connectors straight out of the sockets. Never bend the probe head in order to pry it loose from the amplifier. Also, do not wiggle the probe head up and down or twist it to remove the connectors from the sockets.
  • Page 15 Using InfiniiMax III Series Probes Figure 9 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 probe heads without having to first break the amplifier-to-head connection: •...

  • Page 16: N5477A Sampling Scope Adapter

    The N5477A sampling oscilloscope adapter can also be used to connect the InfiniiMax III probing system to generic 50 Ohm test equipment as long as the 1143A power supply and 5062-1247 NMD male-to-3.5mm female adapter are used. Both of these parts can be ordered through Keysight Technologies. InfiniiMax III Series Probes User’s Guide...

  • Page 17: Cautions

    Using InfiniiMax III Series Probes Cautions In addition to the CAUTION notices below, also refer to the CAUTION notices listed in each section of this book. Electrostatic discharge (ESD) can quickly and imperceptibly damage or destroy CAUTION high-performance probes, resulting in costly repairs. Always wear a wrist strap when handling probe components.
  • Page 18 Using InfiniiMax III Series Probes InfiniiMax III Series Probes User’s Guide...

  • Page 19: Infiniimax Iii Probe Heads

    Keysight InfiniiMax III Series Probes User’s Guide 2 InfiniiMax III Probe Heads N5445A InfiniiMax III Differential Browser Probe Head N2848A InfiniiMax III+ QuickTip InfiniiMode Probe Head N5439A InfiniiMax III ZIF 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...

  • Page 20: N5445A Infiniimax Iii Differential Browser Probe Head

    InfiniiMax III Probe Heads N5445A InfiniiMax III Differential Browser Probe 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 to 125 mil (or 0.5 mm to 3.1 mm).
  • Page 21 InfiniiMax III Probe Heads Figure 12 Adjusting the Tip Span Tip-Span Entry for Probe Calibration When calibrating the probe, you will be prompted to enter the span setting on the oscilloscope’s Probe Calibration dialog box. To determine the tip span, do the following steps: Adjust the browser’s tip span for your measurement.
  • Page 22 InfiniiMax III Probe Heads Mounting the Browser There are two holes on the back side of the browser. Use these holes to mount the browser to a customer designed holder. Figure 14 below shows the dimensions of these mounting holes. Figure 14 Dimensions of Mounting Holes Probe Along the Browser’s Axis To prevent tip damage, probe along the browser’s axis as shown in...
  • Page 23 InfiniiMax III Probe Heads Figure 16 Improper Probe Handling Do not apply too much force when browsing. The weight of the probe in your hand should be CAUTION sufficient. The axial travel of the probe is about 15 mils (0.4 mm). The browser’s protective cap should be kept on the browser at all times except when probing.
  • Page 24 InfiniiMax III Probe Heads Table 1 N5445A Replaceable Parts Description Part Number Browser tips N5476A Ground Blade N4855A Ground Blade Screws N4856A N2787A 3D Probe Positioner Using the N2787A 3D probe positioner with the N5445A browser probe head reduces the chance of breaking the browser tips and ensures that the tips maintain solid contact.

  • Page 25: N2848A Infiniimax Iii+ Quicktip Infiniimode Probe Head

    N OT E InfiniiMode allows you to make differential, common mode, and single ended measurements without having to re-solder the tip leads. InfiniiMode is not available when using with N2800A-series probe amplifiers. Table 2 N2848A with N2804A Probe Amplifier Item...
  • Page 26 InfiniiMax III Probe Heads can optionally cut off the ground leads or fold them out of the way. Be aware that without the ground leads, the mechanical stability of the QuickTip will be reduced and you will need to stabilize the probe head. Figure 20 Probing with the N2848A Probe Head and N2849A QuickTip Do not replace or repair the N2849A QuickTip’s resistor or ground leads.
  • Page 27 InfiniiMax III Probe Heads N2849A QuickTips are also compatible with N2851A QuickTip InfiniiMode Probe Heads, which are designed for 1130/1/2/4A InfiniiMax I and 1168/9A InfiniiMax II probes. Connecting a QuickTip to the DUT Use the following tips when soldering the QuickTips to your DUT: •...
  • Page 28 InfiniiMax III Probe Heads Cleaning the Magnetic Connections If the three magnetic connections in the head become dirty, clean the connections using the following steps: Use compressed air or a cloth to remove any loose dirt. Gently rub a small piece of tack putty (supplied with the probe) against the magnetic connections to clean off any remaining surface grime.

  • Page 29: N5439A Infiniimax Iii Zif Probe Head

    InfiniiMax III Probe Heads N5439A InfiniiMax III ZIF Probe Head The N5439A Zero Insertion Force (ZIF) probe head provides 28 GHz bandwidth. The head supports three types of economical replaceable tips which are shown in Table 3. Solder as many tips onto your DUT as needed. Because of the ZIF tip’s extremely low loading, the tips can remain on the DUT as you easily move the probe head from one probing site to the next.
  • Page 30 If you need to position the resistors different than shown in this figure (that is, resistor bodies close together or spread apart), use Keysight’s N2807A and N2808A PrecisionProbe products to perform an AC calibration of the probe, which properly captures the response.
  • Page 31 InfiniiMax III Probe Heads Break off a ZIF tip/handle combination from the packaging holder at the point shown in the figure. Figure 23 Five ZIF Tips on Packaging Flux and tin the leads on the target DUT. Figure 24 Preparing the DUT Leads While holding the plastic form, form the ZIF tip wires to match the DUT’s pitch and angle.
  • Page 32 InfiniiMax III Probe Heads Figure 25 Soldering the ZIF Tip Pull the ZIF handle from the ZIF tip in the direction shown in Figure 26. ZIF tips can be carefully handled with your fingertips and reinserted into a plastic handle if necessary. Figure 26 Removing the Handle from the ZIF Tip You can connect ZIF tips to any of the locations on a DUT that you need to probe.
  • Page 33 InfiniiMax III Probe Heads Always use the lever when inserting or removing ZIF tips. CAUTION Figure 27 Probe Head with Location of the Lever Figure 28 Probe Head Connected to a Soldered ZIF Tip For more repeatable results, orient the probe connection perpendicular to the device as shown in N OT E Figure InfiniiMax III Series Probes User’s Guide...
  • Page 34 InfiniiMax III Probe Heads Figure 29 Probe Oriented Perpendicular to Device To move the probe head to a different tip, press the lever and remove the probe head from the ZIF tip. The ZIF tip remains soldered to the DUT. Then, simply connect the ZIF head to another ZIF tip at a different location on the DUT.

  • Page 35: N2836A Infiniimax Iii Solder-In Probe Head

    InfiniiMax III Probe Heads 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. The span of the leads can be adjusted from 5 mil - 250 mil (0.127 mm - 6.35 mm). To use the head’s InfiniiMode capability, use this head with N2830A-series probe amplifiers.
  • Page 36 If you need to position the mini-axial lead resistors different than shown in this figure (that is, resistor bodies close together or spread way apart), use Keysight’s N2807A and N2808A PrecisionProbe products to perform an AC calibration of the probe. The AC calibration will capture the response properly.
  • Page 37 InfiniiMax III Probe Heads Figure 34 Tin the Leads Use tweezers to form the probe head wires to fit your DUT’s geometry. Flux the DUT leads and your probe head wires. Figure 35 Applying Flux to Leads and Wires Position the probe head wires on the DUT leads and quickly re-flow the solder as shown in Figure Do not leave the iron in contact with the probe head for more than a few seconds at a time.
  • Page 38 InfiniiMax III Probe Heads InfiniiMax III Series Probes User’s Guide...

  • Page 39: N5441A Infiniimax Iii Solder-In Probe Head

    InfiniiMax III Probe Heads 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. The span of the leads can be adjusted from 5 mil - 80 mil (0.127 mm - 2 mm). The N5441A probe head can be used with the N5450B InfiniiMax extreme temperature extension cable.
  • Page 40 InfiniiMax III Probe Heads Figure 38 Applying Flux Tin the leads with a small amount of solder. Figure 39 Tin the Leads Use tweezers to form the probe head wires to fit your DUT’s geometry. Flux the DUT leads and your probe head wires. Figure 40 Applying Flux to Leads and Wires Position the probe head wires on the DUT leads and quickly re-flow the solder as shown in Figure...
  • Page 41 InfiniiMax III Probe Heads Figure 41 Positioning Wires InfiniiMax III Series Probes User’s Guide...

  • Page 42: N5444A Infiniimax Iii 2.92 Mm / 3.5 Mm / Sma Probe Head

    InfiniiMax III Probe Heads N5444A InfiniiMax III 2.92 mm / 3.5 mm / SMA Probe Head The N5444A InfiniiMax III 2.92 mm/3.5 mm/SMA probe head provides 30 GHz bandwidth and allows you to connect two 2.92 mm, 3.5 mm, or SMA cables to make a differential measurement on a single oscilloscope channel.
  • Page 43 Probe Offset Calibration with the N5444A To achieve more accurate probe offset calibration with the N5444A, an SMA shorting adapter (Keysight part number: 1250-3999) is required. This adapter is provided with the N5444A (with unit serial number US50072545 or higher) and should be connected to the N5444A's "—"...

  • Page 44: N2835A Infiniimax Iii Differential Connectivity Kit And Accessories

    InfiniiMax III Probe Heads N2835A InfiniiMax III Differential Connectivity Kit and Accessories In addition to the individual probe heads described in the previous topics, the N2835A differential connectivity kit is also available for the InfiniiMax III probes. This kit provides multiple quantities of the four InfiniiMax III probe heads as shown Figure 45.
  • Page 45 InfiniiMax III Probe Heads Table 4 Supplied Accessories (Sheet 2 of 2) Part Description Supplied Number Ground Blades N5445-68700 InfiniiMax III Series Probes User’s Guide...

  • Page 46: Strain Relieving The Probe Heads

    Figure 46 Using tack-putty to strain relieve a probe head and amplifier You can also use putty with a positioner, such as the Keysight N2787A. The same positioner can also be used to support your probe amplifier as shown in Figure 18 page 24.
  • Page 47 InfiniiMax III Probe Heads Low-temperature Hot Glue You can also use low-temperature hot glue to secure cables. Only use LOW temperature hot glue. To remove the hot glue, warm it with a heat gun set on CAUTION low. Only heat the hot glue enough to remove it. Figure 48 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.
  • Page 48 InfiniiMax III Probe Heads InfiniiMax III Series Probes User’s Guide...

  • Page 49: Maintaining Probe Heads

    Keysight InfiniiMax III Series Probes User’s Guide 3 Maintaining Probe Heads Replacing Axial Resistor Tips Replacing N5441A Probe Head Wires Many probe heads come equipped with replaceable resistor or wire tips which can be replaced or repaired. Using the procedures in this chapter, you can extend the life of the following items: •...
  • Page 50 Maintaining Probe Heads Replacing Axial Resistor Tips The procedure in this sections shows you how to replace the 130 ohm axial resistors that are located at the tip of the • N2836A solder-in probe head and • N2838A ZIF tip. •...
  • Page 51 Maintaining Probe Heads Figure 49 Clamping the Part Grab each resistor lead or wire 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. Figure 50 Removing the Resistor Clean the soldering iron tip of any excess solder before using.
  • Page 52 Maintaining Probe Heads Use the soldering iron and solder to fill the holes in preparation for mounting the new resistors (or wires). Do not leave the iron in contact with the tip any longer than necessary. CAUTION Use the flux pencil to coat the solder joint area with flux. Locate the trim gauge which is supplied with the N2836-68701 replacement axial resistor kit.
  • Page 53 Rosin flux pencil, RMA type (Kester #186 or equivalent) Flush cutting wire cutters Magnifier or low power microscope Keysight supplied trim gauge (01169-23801) Procedure Use the vise or clamp to position the tip an inch or so off the work surface for easy access.
  • Page 54 Maintaining Probe Heads Figure 53 Clamping the Probe Head As shown in Figure 54, remove the old wires with tweezers while re-flowing the solder from the underside of the probe. Apply heat quickly to avoid damaging your probe. CAUTION Figure 54 Removing the Old Wire If necessary, add a small amount of solder to the holes and apply flux.
  • Page 55 Maintaining Probe Heads Figure 55 Adding Solder and Flux Re-flow 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. Do not dwell with the iron in contact with the probe head. CAUTION Figure 56 Adding a New Wire Figure 57 New Wires Properly Attached...
  • Page 56 Maintaining Probe Heads Figure 58 Trim Wire Stubs Use the included trim gauge to cut the wire lengths. Doing so ensures the best performance from your probe head. Figure 59 Trim Gauge Placed on Wires Figure 60 Removing Excess Wire Check the DC resistance of each probe leg when you have replaced the wires.

  • Page 57: Performance Specifications / Characteristics

    Keysight InfiniiMax III Series Probes User’s Guide 4 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.

  • Page 58: Specifications And Characteristics

    Performance Specifications / Characteristics Specifications and Characteristics Table 8 Probe Amplifiers Probe Amplifier N2800A 16 GHz 27.1 ps N2801A 20 GHz 21.7 ps N2802A 25 GHz 17.4 ps N2803A 30 GHz 14.3 ps InfiniiMax III Series Probes User’s Guide...
  • Page 59 Performance Specifications / Characteristics Table 9 N2803A Amplifier with N2836A, N5441A, and N2848A Probe Heads (Sheet 1 of 2) Specifications / Characteristics N2836A N5441A N2848A QuickTip Head Solder-In Solder-In) with N2849A Tip Probe Bandwidth 27 GHz (typical) 17.2 GHz (typical) 16 GHz (typical) (–3 dB), Probe Only Rise and Fall Time, Probe Only...
  • Page 60 Performance Specifications / Characteristics Table 9 N2803A Amplifier with N2836A, N5441A, and N2848A Probe Heads (Sheet 2 of 2) Specifications / Characteristics N2836A N5441A N2848A QuickTip Head Solder-In Solder-In) with N2849A Tip Maximum Input Voltage 18V peak CAT I 18V peak CAT I 18V peak CAT I *Denotes warranted characteristic - all others are typical **Harmonic distortion <...
  • Page 61 Performance Specifications / Characteristics Table 10 N2803A Amplifier with N2838A, N5447A, and N5440A ZIF Tips (Sheet 1 of 2) Specifications / Characteristics N5439A ZIF Probe Head N2838A N5440A N5447A PC Board ZIF Tip Ceramic ZIF Tip High Sensitivity Ceramic ZIF Tip Probe Bandwidth 25 GHz (typical) 28 GHz (typical),...
  • Page 62 Performance Specifications / Characteristics Table 10 N2803A Amplifier with N2838A, N5447A, and N5440A ZIF Tips (Sheet 2 of 2) Specifications / Characteristics N5439A ZIF Probe Head N2838A N5440A N5447A PC Board ZIF Tip Ceramic ZIF Tip High Sensitivity Ceramic ZIF Tip Maximum Input Voltage 18V peak CAT I 18V peak CAT I...
  • Page 63 Performance Specifications / Characteristics Table 11 N2803A Amplifier with N5444A and N5445A Probe Heads (Sheet 1 of 2) Specifications / Characteristics N5444A N5445A SMA, 3.5 mm, 2.92 mm Adapter Browser Probe Bandwidth 30 GHz (typical) 30 GHz (typical), (–3 dB), Probe Only 28 GHz warranted Rise and Fall Time, Probe Only 15.5 ps (10-90%)
  • Page 64 Performance Specifications / Characteristics Table 11 N2803A Amplifier with N5444A and N5445A Probe Heads (Sheet 2 of 2) Specifications / Characteristics N5444A N5445A SMA, 3.5 mm, 2.92 mm Adapter Browser Maximum Input Power 125 mW calculated with the following equation for each input: –...

  • Page 65: Infiniimax Iii Probe Heads Dimensions

    Performance Specifications / Characteristics InfiniiMax III Probe Heads Dimensions All dimensions included in this section are in millimeters [inches]. N2836A InfiniiMax III Solder-in Head Dimensions N2838A InfiniiMax III PCB ZIF Tip with N5439A ZIF Head Dimensions InfiniiMax III Series Probes User’s Guide...
  • Page 66 Performance Specifications / Characteristics N2848A InfiniiMax III QuickTIp Tip with N2849A QuickTip Head Dimensions N5440A/N5447A InfiniiMax III Ceramic ZIF Tip with N5439A ZIF Head Dimensions InfiniiMax III Series Probes User’s Guide...
  • Page 67 Performance Specifications / Characteristics N5441A InfiniiMax III Solder-in Head Dimensions InfiniiMax III Series Probes User’s Guide...
  • Page 68 Performance Specifications / Characteristics InfiniiMax III Series Probes User’s Guide...

  • Page 69: Calibration / Deskew Procedure

    Keysight InfiniiMax III Series Probes User’s Guide 5 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

    Calibration / Deskew 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. Turn the nut on the Cal Out counter-clockwise to tighten.
  • Page 71 Calibration / Deskew 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. Always wear an ESD wrist strap when working with active probes.
  • Page 72 Calibration / Deskew Procedure Form the wires as shown below if using the N5441A solder-in probe head. Connect your probe head to the amplifier. Position the probe head wires (if you are using the ZIF or Solder-in probe heads) so they curl towards the scope as shown below.
  • Page 73 Calibration / Deskew 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.
  • Page 74 Calibration / Deskew 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 N OT E the fixture if you are using the ZIF probe head or the Solder-in probe head.
  • Page 75 Calibration / Deskew Procedure Never solder a probe tip to the thickfilm gold. The gold will immediately dissolve into the CAUTION solder and disappear. Follow the instructions on the oscilloscope to clamp the wires to either the signal or ground. When connecting the probe wires to the fixture, press down on the spring-loaded fingers described in Step 12 and insert the probe wires.
  • Page 76 Calibration / Deskew Procedure and checking that you have a stable step on screen (note that pressing autoscale will close the Probe Calibration dialog box). When connecting the probe head to the fixture, do not press down with much force or you CAUTION could snap off the fixture from the Cal Out connection.

  • Page 77: Performance Verification

    It is also important to note that the performance measured here is of the probe by itself. Keysight high performance real-time scopes (and sampling scopes under certain conditions) will apply probe correction that will further enhance the performance of the probes.

  • Page 78: Bandwidth Performance Verification

    Needs proper test port cables and/or adaptors to provide male 2.92 mm connectors at reference planes. If test port cables are 2.4 mm or 1.85 mm cables, then Keysight 11904A and 11904D adaptors can be used to convert to 2.92 mm male connectors.
  • Page 79 Performance Verification VNA Setup • Power level: –6 dBm. • Sweep: Log Frequency 50 MHz to 34 GHz, 284 points (100 pts/decade). • IF BW: 1 kHz. • Test port cables and adaptors (if needed) to provide male 2.92 mm connectors at measurement planes.
  • Page 80 Performance Verification Figure 62 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” so no probe offset is applied.
  • Page 81 Performance Verification opposite phase) if the probe is working properly. Figure 63 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.
  • Page 82 Performance Verification Figure 64 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. This new setup is shown in Figure 65.
  • Page 83 Performance Verification Trigger VNA to perform a single sweep. Press “Trigger” under Channel Setup, and then the green soft-key for “Single”. Under “Scale” menu, adjust the reference level until the 50 MHz point (left side of the screen) is at center screen. Reference level should be approximately -15.3 dB, but can vary a few tenths of a dB either way.
  • Page 84 Performance Verification Figure 66 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”. Again, adjust the “Reference Level”...
  • Page 85 You are not required to test the bandwidth specification with both probe heads. If you have the choice between using the ZIF probe head or the browser, Keysight suggests using the ZIF probe head because measurements are more repeatable with it and it is easier to make a proper connection.
  • Page 86 Performance Verification Figure 68 Probe Tips on Microstrip InfiniiMax III Series Probes User’s Guide...
  • Page 87 Performance Verification Figure 69 N2787A 3D Probe Positioner used to measure the N5445A browser with the N2803A amp InfiniiMax III Series Probes User’s Guide...
  • Page 88 N OT E Copying this data from the PRC is the simplest most reliable method to get the data. To download the PRC, visit http://www.Keysight.com/find/PRC. ! freq S11 S21 S12 S22 !Port 1=female 3.5mm connector of 1250-1749 adaptor, Port 2=probe point on N5443A fixture # Hz S DB R 50 50000000.000000 -49.528411 110.869328 -0.026318 -4.180881 -0.025870 -4.223772 -67.754661 -176.153454...
  • Page 89 Performance Verification 203943935.074433 -53.374619 45.618787 -0.044122 -16.994561 -0.041601 -17.016611 -52.209576 52.395133 208698659.780268 -52.713418 43.564007 -0.047367 -17.384868 -0.043113 -17.406702 -51.910498 55.677837 213564235.573780 -53.477228 35.859633 -0.049667 -17.770211 -0.046242 -17.803783 -51.477695 53.799018 218543246.824077 -55.032566 26.702114 -0.051641 -18.159282 -0.050036 -18.209336 -51.013276 49.886314 223638338.151939 -53.869091 26.218432 -0.052370 -18.572260 -0.051093 -18.629032 -51.239963 47.730420 228852215.834522 -51.902344 30.275653 -0.052588 -19.000945 -0.051017 -19.060434 -51.778596 46.370604 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...
  • Page 90 Performance Verification 1230841971.380104 -36.368154 -66.008920 -0.139317 -102.172138 -0.135905 -102.176340 -45.350402 -159.255608 1259537675.070255 -36.484368 -70.298488 -0.140443 -104.535698 -0.138102 -104.561407 -45.199506 -167.298406 1288902386.991699 -36.100137 -71.663451 -0.143996 -106.965470 -0.140718 -106.990081 -44.237343 -167.377205 1318951704.322966 -35.647399 -70.676147 -0.143407 -109.444778 -0.141530 -109.473265 -44.479826 -166.526112 1349701587.873357 -35.473004 -76.169267 -0.144837 -111.996785 -0.140095 -112.024550 -44.898263 -168.705245 1381168370.560588 -35.397257 -76.199011 -0.151281 -114.619927 -0.143939 -114.641006 -44.459548 -179.894988 1413368766.086080 -34.861640 -79.603023 -0.149326 -117.283372 -0.147051 -117.307324 -44.548533 166.433716 1446319877.812507 -34.675802 -83.685975 -0.154729 -120.021826 -0.148112 -120.068082 -43.870957 156.340597...
  • Page 91 Performance Verification 7428374655.799140 -27.017620 -164.842451 -0.348642 104.090333 -0.350091 104.061237 -28.919257 -172.662528 7601558901.200872 -28.551834 174.443449 -0.347845 89.718285 -0.349058 89.706641 -31.030126 -178.119157 7778780743.552826 -29.482132 148.355026 -0.349523 75.016467 -0.358008 74.972608 -32.590336 -177.895400 7960134314.911269 -30.871044 118.843742 -0.356179 59.960289 -0.356072 59.945644 -33.687188 -170.658171 8145715941.916058 -31.950742 79.399064 -0.362965 44.538332 -0.361544 44.536516 -33.634250 -156.266570 8335624196.954902 -31.102992 41.941266 -0.368766 28.807538 -0.367519 28.749027 -31.418216 -149.846807 8529959950.520464 -29.506952 12.987833 -0.380587 12.700933 -0.371898 12.632583 -29.617847 -154.917241 8728826424.788105 -28.037976 -11.924768 -0.387358 -3.772489 -0.377158 -3.828796 -28.033121 -165.368743...
  • Page 92 N OT E Copying this data from the PRC is the simplest most reliable method to get the data. To download the PRC, visit http://www.keysight.com/find/PRC. ! freq S11 S21 S12 S22 !Port 1=female side of 5062_1247 adaptor, Port 2=male side of N5477A # Hz S DB R 50 50000000.000000 -41.543761 18.199382 -0.015231 -10.158056 -0.028545 -10.064176 -41.019132 74.184681...
  • Page 93 Performance Verification 203943935.074433 -43.103278 -8.572691 -0.046521 -40.231587 -0.047866 -40.222535 -43.632839 9.181011 208698659.780268 -43.121602 -9.391791 -0.046759 -41.164509 -0.047999 -41.151288 -43.606664 7.735754 213564235.573780 -43.140393 -10.229988 -0.047002 -42.119181 -0.048134 -42.101693 -43.579961 6.256803 218543246.824077 -43.159664 -11.087726 -0.047251 -43.096110 -0.048273 -43.074256 -43.552719 4.743372 223638338.151939 -43.179428 -11.965461 -0.047506 -44.095815 -0.048415 -44.069494 -43.524931 3.194656 228852215.834522 -43.199700 -12.863660 -0.047767 -45.118827 -0.048560 -45.087934 -43.496586 1.609835 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...
  • Page 94 Performance Verification 1230841971.380104 -35.060434 16.855880 -0.111443 118.568821 -0.107905 118.585920 -33.475859 -0.272518 1259537675.070255 -34.828362 11.895752 -0.113822 112.954191 -0.109121 112.956285 -33.427845 -6.326649 1288902386.991699 -34.637028 5.991891 -0.112972 107.197490 -0.107321 107.209433 -33.232324 -13.441007 1318951704.322966 -34.516264 0.996999 -0.114511 101.309989 -0.109374 101.325896 -33.276860 -19.968521 1349701587.873357 -34.436482 -3.487187 -0.117529 95.287270 -0.113811 95.303572 -33.470614 -26.197174 1381168370.560588 -34.493597 -8.679569 -0.118776 89.117643 -0.113622 89.133122 -33.410081 -33.333905 1413368766.086080 -34.595375 -13.840873 -0.118970 82.803992 -0.114498 82.824258 -33.473961 -39.824003 1446319877.812507 -34.761786 -18.894689 -0.117636 76.342969 -0.117004 76.376265 -33.729027 -45.282698...
  • Page 95 Performance Verification 7428374655.799140 -37.293649 14.340553 -0.263882 -14.759133 -0.258908 -14.695756 -32.761639 143.058679 7601558901.200872 -36.907940 3.855324 -0.267100 -48.660334 -0.266499 -48.613209 -33.766269 86.068082 7778780743.552826 -35.828061 -13.657090 -0.271380 -83.387048 -0.266894 -83.289164 -33.270815 21.805711 7960134314.911269 -33.493068 -37.569054 -0.271134 -118.872118 -0.273741 -118.805162 -31.780351 -32.970164 8145715941.916058 -32.118290 -70.028402 -0.275567 -155.198803 -0.273571 -155.161065 -30.962180 -79.289275 8335624196.954902 -31.894002 -107.235305 -0.277590 167.618358 -0.275756 167.679923 -31.479945 -118.300978 8529959950.520464 -32.709673 -149.757670 -0.279359 129.577007 -0.279958 129.627666 -33.271908 -152.082983 8728826424.788105 -34.055029 170.816461 -0.278450 90.627878 -0.278118 90.672620 -35.491196 -170.796459...

  • Page 96: Dc Input Resistance Performance Verification

    Performance Verification DC Input Resistance Performance Verification Keysight recommends a test interval of one year or 2000 hours of operation. Table 12 Required Equipment Type Requirement Performance Verification Fixture Keysight N5443A (no substitute) BNC(m) to SMA(m) Adapter Pomona 4288 or equivalent...
  • Page 97 Performance Verification Measuring Input Resistance for ZIF Probe Heads or Solder-in Probe Heads Connect the BNC to SMA adapter and BNC to Banana Plug adapters as shown in Figure Position the PV fixture on a table top and clamp it with a small bench vise to steady it. Ensure that the PV fixture is flush with the table top so that when the banana plugs are probed, it does not rock the PV fixture.
  • Page 98 Performance Verification Measuring Input Resistance for the Browser Probe Head The following image shows the correct setup for measuring the differential input resistance of the N5445A Browser probe head (Figure 72). Figure 72 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

    Performance Verification Performance Test Record The recommended test interval is 1 Year/2000 hours. N OT E Keysight Technologies Keysight InfiniiMax III Series Probe Model Number: Tested by: Serial Number: Work Order Number: Recommended next test date: Date: Probe Head Test Limits...
  • Page 100 Performance Verification InfiniiMax III Series Probes User’s Guide...

  • Page 101: Performance Plots

    • Measurement data used for these plots and for determining probe correction were made using Keysight vector network analyzers swept to 40GHz and calibrated with NIST traceable calibration standards.

  • Page 102: 7 Performance Plots

    Performance Plots • Two time responses are shown: • “Time Response to an Ideal Step at Probe Tip” This is the classical “step response” which is defined as the time response to an ideal, zero rise-time step present at the probe tip.

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

    Performance Plots N2836A 26 GHz Solder-In Head (with N2803A) InfiniiMax III Series Probes User’s Guide...
  • Page 104 Performance Plots InfiniiMax III Series Probes User’s Guide...
  • Page 105 Performance Plots InfiniiMax III Series Probes User’s Guide...

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

    Performance Plots N2838A/N5439A 25 GHz PCB ZIF Tip/Head (with N2803A) InfiniiMax III Series Probes User’s Guide...
  • Page 107 Performance Plots InfiniiMax III Series Probes User’s Guide...
  • Page 108 Performance Plots InfiniiMax III Series Probes User’s Guide...

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

    Performance Plots N5440A/N5439A 28 GHz Ceramic ZIF Tip/Head (with N2803A) InfiniiMax III Series Probes User’s Guide...
  • Page 110 Performance Plots InfiniiMax III Series Probes User’s Guide...
  • Page 111 Performance Plots InfiniiMax III Series Probes User’s Guide...

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

    Performance Plots N5447A/N5439A 28 GHz Ceramic High-Sensitivity ZIF Tip/Head (with N2803A) InfiniiMax III Series Probes User’s Guide...
  • Page 113 Performance Plots InfiniiMax III Series Probes User’s Guide...
  • Page 114 Performance Plots InfiniiMax III Series Probes User’s Guide...

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

    Performance Plots N5441A 16 GHz Solder-In Head (with N2803A) InfiniiMax III Series Probes User’s Guide...
  • Page 116 Performance Plots InfiniiMax III Series Probes User’s Guide...
  • Page 117 Performance Plots InfiniiMax III Series Probes User’s Guide...

  • Page 118: N5444A 30 Ghz Sma 2.92 Mm Head (With N2803A)

    Performance Plots N5444A 30 GHz SMA 2.92 mm Head (with N2803A) InfiniiMax III Series Probes User’s Guide...
  • Page 119 Performance Plots InfiniiMax III Series Probes User’s Guide...
  • Page 120 Performance Plots InfiniiMax III Series Probes User’s Guide...

  • Page 121: N5445A 30 Ghz Browser Head, 1 Mm Span (With N2803A)

    Performance Plots N5445A 30 GHz Browser Head, 1 mm span (with N2803A) InfiniiMax III Series Probes User’s Guide...
  • Page 122 Performance Plots InfiniiMax III Series Probes User’s Guide...
  • Page 123 Performance Plots InfiniiMax III Series Probes User’s Guide...

  • Page 124: N5445A 30 Ghz Browser Head, 2 Mm Span (With N2803A)

    Performance Plots N5445A 30 GHz Browser Head, 2 mm span (with N2803A) For browser spans of 2 and 3mm, the biggest effect is in the frequency and time responses. The input N OT E loading is nearly the same as for the 1mm span except that the impedance minimum at ~22 GHz is slightly higher.
  • Page 125 Performance Plots InfiniiMax III Series Probes User’s Guide...
  • Page 126 Performance Plots InfiniiMax III Series Probes User’s Guide...

  • Page 127: N5445A 30 Ghz Browser Head, 3 Mm Span (With N2803A)

    Performance Plots N5445A 30 GHz Browser Head, 3 mm span (with N2803A) For browser spans of 2 and 3mm, the biggest effect is in the frequency and time responses. The input N OT E loading is nearly the same as for the 1mm span except that the impedance minimum at ~22 GHz is slightly higher.
  • Page 128 Performance Plots InfiniiMax III Series Probes User’s Guide...

  • Page 129: Spice Models

    Keysight InfiniiMax III Series Probes User’s Guide 8 SPICE Models SPICE Models for N5440/1/4/5/7A Probe Heads SPICE Models for N2838A and N2836A Probe Head Simplified InfiniiMax III Schematic The SPICE models in this chapter are for the input impedances of the various Infiniimax III+ probes heads.

  • Page 130: Spice Models For N5440/1/4/5/7A Probe Heads

    SPICE Models SPICE Models for N5440/1/4/5/7A Probe Heads The SPICE models in this section are 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. Chapter 7, “Performance Plots”...
  • Page 131 SPICE Models Figure 73 SPICE circuit for N5440A, N5447A, N5441A, N5445A, and N5444A probe heads InfiniiMax III Series Probes User’s Guide...
  • Page 132 SPICE Models N5440A Ceramic ZIF Tip, N5439A ZIF Probe Head For matching between the modeled and measured input impedances, refer to “N5440A/N5439A 28 GHz Ceramic ZIF Tip/Head (with N2803A)" on page 109. .subckt N5440A_N5439A_450ohmZIF 1 2 c1 1 10 20f l1 10 11 1.5n r1 11 2 180 rp1 1 3 180...
  • Page 133 SPICE Models N5441A Solder-In Probe Head For matching between the modeled and measured input impedances, refer to “N5441A 16 GHz Solder-In Head (with N2803A)" on page 115. .subckt N5441A_SldrIn 1 2 c1 1 10 50f l1 10 11 2.1n r1 11 2 65 rp1 1 3 65 lp1 3 4 2.5n cp1 4 5 55f...
  • Page 134 SPICE Models N5445A Browser Probe Head (2 mm span) For matching between the modeled and measured input impedances, refer to “N5445A 30 GHz Browser Head, 2 mm span (with N2803A)" on page 124. .subckt N5445A_Brwsr2mmSpn 1 2 c1 1 10 20f l1 10 11 2.3n r1 11 2 250 rp1 1 3 250...
  • Page 135 SPICE Models N5444A SMA Probe Head 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 temporal nature of this probe head. The sub-circuit text is: For matching between the modeled and measured input impedances, refer to “N5444A 30 GHz SMA 2.92 mm Head (with N2803A)"...

  • Page 136: Spice Models For N2838A And N2836A Probe Head

    SPICE Models SPICE Models for N2838A and N2836A Probe Head 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. Chapter 7, “Performance Plots”...
  • Page 137 SPICE Models You’ll find the following SPICE data on the documentation CD that was shipped with your probe. N OT E Copying this data from the CD is the simplest most reliable method to get the data. N2838A PC Board ZIF Tip, N5439A ZIF Probe Head For matching between the modeled and measured input impedances, refer to “N2838A/N5439A 25 GHz PCB ZIF Tip/Head (with N2803A)"...
  • Page 138 SPICE Models N2836A Solder-In Probe Head For matching between the modeled and measured input impedances, refer to “N2836A 26 GHz Solder-In Head (with N2803A)" on page 103. .subckt N2836A_SldrIn 1 2 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 139: Simplified Infiniimax Iii Schematic

    SPICE Models Simplified InfiniiMax III Schematic Do not use this simplified schematic as a SPICE model. N OT E Figure 75 InfiniiMax III Simplified Schematic InfiniiMax III Series Probes User’s Guide...
  • Page 140 SPICE Models InfiniiMax III Series Probes User’s Guide...
  • Page 141 N5446A-004 16 GHz to 25 GHz, N5446A-005 16 GHz to 30 GHz, N2787A 3D probe positioner, N5446A-006 20 GHz to 30 GHz, sampling oscilloscope, N2800A 16 GHz probe amplifier, bandwidth upgrades, adapter, 7, N2801A 20 GHz probe amplifier, Browser, Schematic,...
  • Page 142 Index InfiniiMax III+ Series Probes User’s Guide...

This manual is also suitable for:

N2801aN2802aN5477aN5445a infiniimax iiiN2848a infiniimax iii+N5439a infiniimax iii ... Show all

Table of Contents