Keysight N2830/1/2A and N7000/1/2/3A InfiniiMax III+ Probes

Keysight N2830/1/2A and N7000/1/2/3A InfiniiMax III+ Probes
Keysight
N2830/1/2A and N7000/1/2/3A
InfiniiMax III+ Probes
User’s Guide
Notices
© Keysight Technologies, Inc. 2015
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Manual Part Number
N2830-97005
Edition
Fifth Edition, October 2015
Printed in USA
Published by:
Keysight Technologies, Inc.
1400 Fountaingrove Parkway
Santa Rosa, CA 95403 USA
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Safety Notices
CAUTION
A CAUTION notice denotes a hazard.
It calls attention to an operating
procedure, practice, or the like that,
if not correctly performed or
adhered to, could result in damage
to the product or loss of important
data. Do not proceed beyond a CAUTION notice until the indicated conditions are fully understood and
met.
WARNING
A WARNING notice denotes a hazard. It calls attention to an operating procedure, practice, or the like
that, if not correctly performed or
adhered to, could result in personal
injury or death. Do not proceed
beyond a WARNING notice until the
indicated conditions are fully
understood and met.
Contents
1 Using InfiniiMax III+ Series Probes 5
Inspecting the Probe and Its Accessories 6
Introduction 9
Compatible Oscilloscopes 15
To Avoid Damaging the Probe 16
To Ensure Maximum Measurement Accuracy 21
To Use InfiniiMode 22
To Probe Ungrounded Devices 25
To Probe Single-Ended Signals with a Differential Head 26
To Measure Small Signals on a Large DC Level 27
Slew Rate Requirements for Different Technologies 30
Available Accessories 32
Safety Information 34
Service 37
2 Using InfiniiMax III+ Probe Heads 39
Recommended Configurations at a Glance 40
N5444A InfiniiMax III 2.92 mm/3.5 mm/SMA Probe Head 42
N5439A InfiniiMax III ZIF Probe Head 44
N5445A InfiniiMax III Differential Browser Probe Head 50
N5441A InfiniiMax III Solder-In Head 56
N2836A InfiniiMode Solder-In Head 59
N2848A QuickTip InfiniiMode Probe Head 64
Strain Relieving the Probe Heads 68
Soldering Tips 70
3 Maintaining Probe Heads 71
Replacing Axial Resistor Tips 72
Replacing N5441A Probe Head Wires 76
4 Calibration / Deskew Procedure
Procedure 82
81
5 Specifications and Characteristics 87
N2830/1/2A Probe Amplifier Specifications and Characteristics 88
3
N2830/1/2A Probe Head Characteristics 90
N7000/1/2/3A Probe Amplifier Specifications and Characteristics
N7000/1/2/3A Probe Head Characteristics 93
Environmental 94
Safety and Regulatory Information 95
Probe Dimensions 96
91
6 Performance Plots 97
InfiniiMax III+ Probe System Responses 98
N2848A QuickTip Head with N2849A QuickTip 101
N2836A Solder-In Probe Head (Flat Orientation) 102
7 Performance Verification for N2830A-Series Probes 105
Bandwidth Performance Verification 106
DC Input Resistance Performance Verification 123
Performance Test Record 125
8 Performance Verification for N7000-Series Probes 127
Bandwidth Performance Verification 128
DC Input Resistance Performance Verification 137
Performance Test Record 139
9 SPICE Models 141
N2848A QuickTip Head with N2849A QuickTip Tip 142
N5439A ZIF Probe Head with N5440A ZIF Tip 143
N5439A ZIF Probe Head with N2838A ZIF Tip 144
N2836A 26 GHz Solder-In Probe Heads 145
N5441A 16 GHz Solder-In Probe Head 146
N5445A Browser Probe Head 147
N5444A SMA Probe Head 149
4
InfiniiMax III+ Series Probes User’s Guide
Keysight InfiniiMax III+ Series Probes
User’s Guide
1 Using InfiniiMax III+ Series
Probes
Inspecting the Probe and Its Accessories 6
Introduction 9
Compatible Oscilloscopes 15
To Avoid Damaging the Probe 16
To Ensure Maximum Measurement Accuracy 21
To Use InfiniiMode 22
To Probe Ungrounded Devices 25
To Probe Single-Ended Signals with a Differential Head 26
To Measure Small Signals on a Large DC Level 27
Slew Rate Requirements for Different Technologies 30
Available Accessories 32
Safety Information 34
Service 37
This user’s guide covers the N2830/1/2A and N7000/1/2/3A InfiniiMax III+ series
differential probes that are shown in Figure 1.
Figure 1
InfiniiMax III+ Series Probes
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Using InfiniiMax III+ Series Probes
Inspecting the Probe and Its Accessories
The N2830/1/2A and N7000/1/2/3A InfiniiMax III+ probes are shipped with a case,
calibration information, probe handling guide, and probe information card that are
shown in Figure 2 on page 7 or Figure 3 on page 8. Most, but not all, of the
shipped items are shown in these figures. After opening the case, lift out the foam
cutout and flip the cutout over to reveal an calibration envelope and a handling
guide.
When you receive your probe, check the following items:
•
Inspect the shipping container for damage.
Keep the damaged shipping container or cushioning material until the contents of the
shipment have been checked for completeness and the probe has been checked
mechanically and electrically.
•
Check the accessories.
•
If the contents are incomplete or damaged, notify your Keysight Technologies
Sales Office.
•
Inspect the probe. If there is mechanical damage or defect, or if the probe does
not operate properly or pass calibration 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 claim settlement.
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InfiniiMax III+ Series Probes User’s Guide
Using InfiniiMax III+ Series Probes
Figure 2
1
N2830A-Series Probe and Accessories in Supplied Case
InfiniiMax III+ Series Probes User’s Guide
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1
Using InfiniiMax III+ Series Probes
Figure 3
8
N7000A-Series Probe and Accessories in Supplied Case
InfiniiMax III+ Series Probes User’s Guide
Using InfiniiMax III+ Series Probes
1
Introduction
The InfiniiMax III and III+ Probing System Family Diagram, Figure 4 on page 10,
shows compatible oscilloscopes, probes, and probe heads. The N2830/1/2A probes
connect to the oscilloscope using a precision-BNC connection (AutoProbe 1). The
N7000/1/2/3A probes connect to the oscilloscope using a 3.5 mm connection (AutoProbe
2). Figure 5 on page 11 and Figure 6 on page 12 identify most of the probe parts.
Table 1
Probe Bandwidths
AutoProbe 1 (Precision BNC)
Scope Connection
AutoProbe 2 (3.5 mm)
Scope Connection
Probe
Bandwidth
Probe
Bandwidth
N2832A
13 GHz
N7003A
20 GHz
N2831A
8 GHz
N7002A
16 GHz
N2830A
4 GHz
N7001A
13 GHz
N7000A
8 GHz
Both the InfiniiMax III+ N2830/1/2A and N7000/1/2/3A probes support InfiniiMode
when using the N2848A QuickTip probe head, N2836A Solder-in head or N5444A
2.92 mm/SMA head. InfiniiMode allows you to switch between differential,
single-ended, and common mode measurements without needing to change or
reconnect the probe or probe leads. Switching measurements is accomplished
using the oscilloscope’s probe configuration dialog box. For more information,
refer to “To Use InfiniiMode" on page 22.
WARNING
Before using the probe, refer to “Safety Information" on page 34.
Probe heads
Before you can use the probe, you must connect one of the available probe heads
that are shown in Figure 4 on page 10 and documented in Chapter 2, “Using
InfiniiMax III+ Probe Heads". These probe heads are also compatible with the
InfiniiMax III N2800A-series probes.
CAUTION
Before using the probes, refer to “To Avoid Damaging the Probe" on page 16.
Differential probe heads offer easy measurement of differential signals and greatly
improve the measurement of single-ended signals. Single-ended probe heads
offer extremely small size for probing single-ended signals in confined spaces.
InfiniiMax III+ Series Probes User’s Guide
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Using InfiniiMax III+ Series Probes
Figure 4 InfiniiMax III and III+ Family Diagram with Compatible Scopes and Probe Heads
(not to scale)
10
InfiniiMax III+ Series Probes User’s Guide
Using InfiniiMax III+ Series Probes
Figure 5
1
N2830/1/2A Probes
InfiniiMax III+ Series Probes User’s Guide
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Using InfiniiMax III+ Series Probes
Figure 6
12
N7000/1/2/3A Probes
InfiniiMax III+ Series Probes User’s Guide
Using InfiniiMax III+ Series Probes
1
AutoProbe Interface Connectors
Figure 7 and Figure 8 show the AutoProbe interface connectors that connect the
probes to the oscilloscope. The N2830/1/2A probes use the AutoProbe I interface
which connects to precision BNC oscilloscope channel inputs. It is compatible with
Infiniium oscilloscopes such as the 90000A and S-series. Of course, the probe
model must be also supported by the oscilloscope software.
The N7000/1/2/3A probes use the AutoProbe II 3.5 mm interface, which is
compatible with 90000 Q/V/X/Z-series oscilloscopes without the use of an
adapter
Figure 7
N2830/1/2A’s AutoProbe I Interface Connector
Figure 8
N7000/1/2/3A’s AutoProbe II Interface Connector
InfiniiMax III+ Series Probes User’s Guide
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Using InfiniiMax III+ Series Probes
Voltage Limits
The N2830/1/2A and N7000/1/2/3A probes are designed for Measurement
Category I (CAT I). Measurement Category I is for measurements performed on
circuits not directly connected to a mains supply. Observe the following voltage
limits:
Maximum AC at probe tips: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Vrms
Maximum DC at probe tips: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±18V
WARNING
Always observe the ESD, temperature, maximum voltage, and maximum terminal
voltages listed on the probe labels.
N7000/1/2/3A probe buttons
Press the Menu button to bring up the oscilloscope’s Probe dialog box.
When using the N5445A browser head, press the Light button to turn on and off
the browser’s LED headlight. Pressing and holding this button will ramp the
intensity of the LED headlights so that you can adjust the brightness to
accommodate different lighting or glare conditions.
Figure 9
Buttons on 7000/1/2/3A Probe
Cleaning the probe
If the probe requires cleaning, disconnect it from the oscilloscope and clean it with
a soft cloth dampened with a mild soap and water solution. Make sure the probe is
completely dry before reconnecting it to the oscilloscope.
Channel identification rings
When multiple probes are connected to the oscilloscope, use the channel
identification rings to associate the channel inputs with each probe. Place one
colored ring near the probe’s channel connector and place an identical color ring
near the probe head.
14
InfiniiMax III+ Series Probes User’s Guide
Using InfiniiMax III+ Series Probes
1
Compatible Oscilloscopes
The N2830/1/2A probe’s precision BNC AutoProbe I interface connects directly to
S-series and 90000A oscilloscopes. Use an N5442A adapter to connect to series
90000 Q, V, X, and Z-series Infiniium oscilloscopes. Use an N1022B adapter to
connect to the 86100D oscilloscope.
The N7000/1/2/3A probe’s AutoProbe II interface connects directly to series
90000 Q, V, X, and Z-series Infiniium oscilloscopes. Use an N5477A adapter to
connect to the 86100D oscilloscope.
The N2830/1/2A and N7000/1/2/3A probes are not compatible with Infiniium
9000 Series, InfiniiVision and any old generation Keysight, Agilent, or HP
oscilloscopes.
Table 2
N2830A-Series Probes and Compatible Infiniium Oscilloscopes
Oscilloscope
Adapter Required
Minimum Required Firmware
Version
90000 Q, V, X, and Z-Series
N5442A
5.00
90000A Series
none
5.00
S-Series
none
5.00
86100C/D Series
N1022A/B
—
Table 3
N7000A-Series Probes and Compatible Infiniium Oscilloscopes
Oscilloscope
Adapter Required
Minimum Required Firmware
Version
90000 Q, V, X, Z-Series
none
5.50
86100C/D Series
N5477A
—
Is your oscilloscope 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 model number. Click
on the “Drivers, Firmware & Software” tab under the Technical Support link.
86100C/D sampling oscilloscope
The probes can be used with the 86100C/D sampling scope with degraded
performance, depending on the probe head used. Use only in differential 1x mode
(10:1 attenuation). For N2830/1/2A probes, use the N1022B adapter. For
N7000/1/2/3A probes, use the N5477A adapter.
InfiniiMax III+ Series Probes User’s Guide
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Using InfiniiMax III+ Series Probes
To Avoid Damaging the Probe
In this section, you’ll learn to properly handle your 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.
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.
CAUTION
Probes are sensitive devices and should be treated with care. Do not bend or kink the
probe amplifier cable. Do not drop heavy objects on the probe, drop the probe from
large heights, spill liquids on the probe, etc. Any of these examples can significantly
degrade the performance of the probe.
CAUTION
When storing the probe, it is best to coil the cable in a large radius and avoid a net
twist in the cable during the process. This can be done in a similar manner to how
garden hoses or extension cords are typically coiled.
CAUTION
InfiniiMax I and II probe heads cannot be used with Infiniimax III+ probe amplifiers and
InfiniiMax III+ probe heads cannot be used with InfiniiMax I and II amplifiers.
CAUTION
Never allow the probe head to be connected to the probe amplifer, if the probe
amplifier is not connected to the oscilloscope channel.
CAUTION
Always disconnect an N2836A or N5441A solder-in probe head from the probe
amplifier before unsoldering, moving to a new position, and resoldering the head.
Using a static-safe work station
InfiniiMax probes and accessories are ESD sensitive devices and should be treated
with care. Before using or handling the probe or accessories, always wear a
grounded ESD wrist strap and ensure that cables and probe heads are discharged
before being connected.
All work, including connecting probe amplifiers to the oscilloscope, should be
performed at a static-safe work station as shown in Figure 10.
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InfiniiMax III+ Series Probes User’s Guide
Using InfiniiMax III+ Series Probes
1
Figure 10 Static-Safe Work Station
Many scopes including Keysight's 90000X or V series have a front-panel ground
socket. You can plug the wrist strap into the ground socket as seen in the following
picture.
Figure 11 Wrist Strap Connected to Oscilloscope Ground Socket
The static-safe work station shown in Figure 10 uses two types of ESD protection:
•
Conductive table-mat and wrist-strap combination.
•
Conductive floor-mat and heel-strap combination.
InfiniiMax III+ Series Probes User’s Guide
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Using InfiniiMax III+ Series Probes
Both types, when used together, provide a significant level of ESD protection. Of
the two, only the table-mat and wrist-strap combination provides adequate ESD
protection when used alone. To ensure user safety, the static-safe accessories
must provide at least 1 MW of isolation from ground. Purchase acceptable ESD
accessories from your local supplier.
WARNING
These techniques for a static-safe work station should not be used when working on
circuitry with a voltage potential greater than 500 volts.
Safely connecting the probe to an oscilloscope
To protect against ESD damage, always use the four steps shown in Figure 12 on
page 19 when connecting your probe to the oscilloscope.
CAUTION
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. 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. This can damage the pins in the amplifier or the probe
head itself.
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:
•
N5445A differential browser head
•
N5439A ZIF head,
•
N5444A 2.92 mm/3.5 mm/SMA head.
•
N2848A QuickTip InfiniiMode head.
The only exception is when the DUT is not grounded to the oscilloscope via the AC
mains ground. In this case, connect the DUT ground to the oscilloscope ground
before moving the probe. An example of a device having a floating ground would
be a battery-powered DUT.
18
CAUTION
When probing with an N2836A and N5441A, always disconnect the probe head from
the amplifier before unsoldering, moving to a new position, and resoldering the head.
This is because some soldering-iron tips can hold a charge which can damage the
probe amplifier.
CAUTION
When probing with an N2848A, always disconnect the probe head from probe tip
before unsoldering, moving to a new position, and resoldering the tip. This is because
some soldering-iron tips can hold a charge which can damage the probe amplifier.
InfiniiMax III+ Series Probes User’s Guide
Using InfiniiMax III+ Series Probes
1
Figure 12 Connecting the Probe to the Oscilloscope
Safely disconnecting the probe from an oscilloscope
Always disconnect the probe head from the probe amplifier before:
•
disconnecting the probe amplifier from the oscilloscope.
•
switching the probe amplifier from one oscilloscope channel to another.
InfiniiMax III+ Series Probes User’s Guide
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Using InfiniiMax III+ Series Probes
CAUTION
Never allow the probe head to be connected to the probe amplifier, if the probe
amplifier is not connected to the oscilloscope channel.
Figure 13 Probe Improperly Disconnected from Oscilloscope while Probe Head is Connected
to the Probe Amplifier
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InfiniiMax III+ Series Probes User’s Guide
Using InfiniiMax III+ Series Probes
1
To Ensure Maximum Measurement Accuracy
To increase measurement accuracy, use the oscilloscope’s Select Probe Head dialog
box to indicate the type of probe head that is attached to the probe amplifier.
Making this selection allows the oscilloscope to apply the proper type of correction
filter (S parameter) for your measurement case. The correction filter increases
accuracy by flattening the magnitude and phase response of the probe. The
following two sources of S parameters are automatically used for the filter:
•
S parameters of the InfiniiMax III+ probe amplifier. These S parameters are
unique to and stored on the probe amplifier.
•
S parameters of the specific probe-head model. For example, the N2836A: DF
Solder-In (Vertical) selection applies S parameters for the N2836A head held in a
vertical position (perpendicular to the surface of the DUT).
To display the dialog box, click Probes > Channel Setup Menu.
Figure 14 Select Probe Head Dialog Box
InfiniiMax III+ Series Probes User’s Guide
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Using InfiniiMax III+ Series Probes
To Use InfiniiMode
InfiniiMode allows you to switch between differential, single-ended, and common
mode measurements without needing to change or reconnect the probe or probe
leads. Switching measurements is accomplished using the oscilloscope’s probe
configuration dialog box.
N OT E
InfiniiMode is available when using InfiniiMax III+ N2830/1/2A and N7000/1/2/3A probes.
InfiniiMode is not available when using InfiniiMax I, II, or III probe amplifiers.
The N2848A QuickTip, N2836A Solder-In head, and N5444A SMA head are
InfiniiMode compatible.
The following table shows, depending on the probe tip and InfiniiMode setting,
which signal types can be measured.
Table 4
Supported InfiniiMode Measurements by Probe Tip
InfiniiMode
Setting
Signal Being Measured
Single-Ended
Differential
Differential
Browser (full BW) *
Browser (full BW)
Solder-In (lower BW)
Solder-In (lower BW)
QuickTip (lower BW)
QuickTip (lower BW)
Browser (not supported)
Browser (not supported)
Solder-In
Solder-In
QuickTip
QuickTip
Browser (not supported)
Browser (not supported)
Solder-In
Solder-In
QuickTip
QuickTip
Single-Ended
Common-Mode
* Full bandwidth obtained by touching one tip to ground.
N OT E
Because the N5445A browser tip has two leads instead of three, it is not InfiniiMode
compatible. However, you can still use the browser tip to measure single-ended signals by
selecting differential mode and touching one tip to ground.
Making InfiniiMode connections
When probing a differential or common mode signal, connect the probe tips as
shown in Figure 15. The positive (+) and negative (–) leads can be reversed by
swapping the connections at the probe amplifier.
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InfiniiMax III+ Series Probes User’s Guide
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1
Figure 15 Example InfiniiMode Probe Circuit Connections
N OT E
Soldering the ground wires is not required when making differential or single-ended (+ or –
leads) measurements.
The following measurements can be made without reconnecting the probe tips.
These equations use the voltages shown in Figure 15.
Differential Measurement
V +lead – V – lead = 4V – 1V = 3V
Common Mode Measurement
V
+V
4V + 1V
---+lead
-----------------–--lead
----- = -------------- = 2.5V
2
2
Single-Ended Measurement with +Lead
V +lead – gnd = 4V – 0V = 4V
Single-Ended Measurement with –Lead
V – lead – gnd = 1V – 0V = 1V
InfiniiMax III+ Series Probes User’s Guide
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Using InfiniiMax III+ Series Probes
Selecting the InfiniiMode mode
With the probe connected to an S-series, 90000 series, 90000 X, Q, Z, or V-series
Infiniium oscilloscope, perform the following steps:
1 Click Setup > Probe Configuration to open the Probe Configuration Setup dialog box
shown in Figure 16.
2 In the dialog box, click the Probe Amp block to open the Probe Amplifier dialog
box.
3 Select the InfiniiMode measurement mode: Differential, Single-Ended A,
Single-Ended B, or Common Mode. The default setting is Differential.
Figure 16 Probe Configuration Dialog Box and Probe Amplifier Dialog Box
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InfiniiMax III+ Series Probes User’s Guide
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Using InfiniiMax III+ Series Probes
To Probe Ungrounded Devices
If the DUT is not grounded to the oscilloscope via the AC mains ground, connect
the DUT ground to the oscilloscope ground. An example of a floating ground is a
battery-powered device.
Without the ground connection, the common mode voltage is not guaranteed to
be within the common mode range of the probe amplifiers.
N OT E
Failure to connect the ground may result in the display of inaccurate waveforms.
Figure 17 Grounding the DUT to an S-Series Oscilloscope
InfiniiMax III+ Series Probes User’s Guide
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Using InfiniiMax III+ Series Probes
To Probe Single-Ended Signals with a Differential Head
Using a differential probe head rather than a single-ended probe head to probe
single-ended signals results in the advantages of higher bandwidth and increased
accuracy. Also no offset range is sacrificed when using a differential probe head,
as any supplied offset is applied only to the probe head’s plus side. To learn more
about applying a DC offset when probing, refer to “To Measure Small Signals on a
Large DC Level" on page 27.
If possible, orient the probe head vertically as shown in Figure 18. Laying the
probe head flat over a single-ended signal will cause coupling to the tip that can
degrade the performance. Notice that the head’s “–” lead is connected to ground.
Figure 18 Connecting a Differential Head to a Single-Ended Signal
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InfiniiMax III+ Series Probes User’s Guide
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Using InfiniiMax III+ Series Probes
To Measure Small Signals on a Large DC Level
Measuring small AC signals riding on top of a large DC can be challenging. By
subtracting out most or all of the DC component, the signal can be positioned to
better utilize the input’s available dynamic range. This is accomplished by applying
an offset by either the probe or oscilloscope channel. Scope channel offset is
applied when viewing differential signals. Probe offset is applied when viewing
single-ended signals.
Normal Offset Behavior
Figure 19 shows Normal selected in the Probe Offset dialog box. When probing
differential signals Normal allows you to apply probe offset using the oscilloscope’s
front-panel vertical offset controls.
Figure 19 Probe Offset Dialog Box (Normal Setting)
Probe Offset Behavior
When Probe is selected as shown in Figure 20 on page 28, the InfiniiMax III/III+
probe provides a very large offset range (up to ±16V) for probing single-ended
signals and a large common-mode range for probing differential signals. Use this
offset range to subtract most or all of the DC component of the input signal so
that the signal can better utilize the dynamic range of the input. This is possible
due to the designs having summing nodes at the amplifier input. For information
InfiniiMax III+ Series Probes User’s Guide
27
1
Using InfiniiMax III+ Series Probes
on properly using probe offset to ensure that you can get the maximum
performance and dynamic range from the InfiniiMax probe, refer to Keysight
application note 5988-9264EN.
Figure 20 Probe Offset Dialog Box (Probe Setting)
Understanding how to properly use offset for your application can ensure that you
get the maximum performance and dynamic range from your probes. The unique
method of applying probe offset in InfiniiMax differential probes allows the full
benefits of differential probing for single-ended signals without sacrificing offset
range. Table 5 on page 29 lists the interactions between the signal type and the
different offsets.
28
InfiniiMax III+ Series Probes User’s Guide
Using InfiniiMax III+ Series Probes
Table 5
1
Signal Type and Available Offset Range
Signal Being Probed
Single Ended
Differential
Probe Head Type
Differential or
Single Ended Head
Differential Head
Offset Applied To
Probe
(channel offset is set to 0V)
Oscilloscope Channel
(probe offset is set to 0V)
Offset Range
±16V
(with 450 ohm probe head)
±2.5V
Description
The offset voltage is subtracted from the input signal
before the probe’s differential amplifier. Since this
subtraction is done before any active circuits, the
offset range is large.
Differential Probe Head. A differential probe can
make higher bandwidth and more accurate
measurements on single-ended signals than a
single-ended probe and this method of applying
offset to only the plus side of a differential probe
means that there is no sacrificing of offset range. All
of the InfiniiMax III+ heads are differential.
Single-Ended Probe Head. Single-ended probe tips
do not have a minus lead so nothing is plugged into
the probe amplifier’s “–” input. This is normal and
does not cause any problems.
Since the plus and minus sides of differential
signals have the same dc component, the dc
component is subtracted out and the probe’s
output by definition is centered around ground.
The channel offset allows the waveform seen
on screen to be moved as desired. The
allowable dc component in the plus and minus
signals is determined by the common mode
range of the probe.
Any voltage applied to the probe’s offset input
jack is not used and has no effect on the signal.
InfiniiMax III+ Series Probes User’s Guide
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Using InfiniiMax III+ Series Probes
Slew Rate Requirements for Different Technologies
The following table shows the slew rates for several different technologies. The
maximum allowed input slew rate is 18 V/ns for single-ended signals and 30 V/ns
for differential signals. Table 6 shows that the maximum required slew rate for the
different technologies is much less that of the probe.
Table 6
Slew Rate Requirements
Name of Technology
Differential
Signal
Max
Single-Ended
Slew Rate*
(V/ns)
Max
Differential
Slew Rate†
(V/ns)
Driver Min Edge
Rate (20%-80%
ps)
Max Transmitter
Level (Diff V)
PCI Express (3GIO)
YES
9.6
19.2
50
1.6
RapidIO Serial 3.125Gb
YES
8.0
16.0
60
1.6
10GbE XAUI (4x3.125Gb)
YES
8.0
16.0
60
1.6
1394b
YES
8.0
16.0
60
1.6
Fibre Channel 2125
YES
8.0
16.0
75
1
Gigabit Ethernet 1000Base-CX YES
7.8
15.5
85
2.2
RapidIO 8/16 2Gb
YES
7.2
14.4
50
1.2
Infiniband 2.5Gb
YES
4.8
9.6
100
1.6
HyperTransport 1.6Gb
YES
4.0
8.0
113
1.5
SATA (1.5Gb)
YES
1.3
2.7
134
0.6
USB 2.0
YES
0.9
1.8
375
1.1
DDR 200/266/333
NO
7.2
n/a
300
3.6
PCI
NO
4.3
n/a
500
3.6
AGP-8X
NO
3.1
n/a
137
0.7
* The probe specification is 18 V/ns
† The probe specification is 30 V/ns
30
InfiniiMax III+ Series Probes User’s Guide
Using InfiniiMax III+ Series Probes
1
Figure 21 Slew Rates of Popular Technologies Compared to Maximum Probe Slew Rates
InfiniiMax III+ Series Probes User’s Guide
31
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Using InfiniiMax III+ Series Probes
Available Accessories
The following is a partial list of available probe and oscilloscope accessories.
Performance verification fixture
An E2655C or N5443A Performance Verification (PV) fixture is an
accessory that is used to properly position the probe during
performance verification testing as described in Chapter 7 and
Chapter 8.
N5450B Extreme temperature cable extension kit
For extreme temperature testing, such as monitoring a
device in a temperature chamber, order the N5450B
InfiniiMax extreme temperature extension cable for use
with the N5441A solder-in head.
Keysight’s Infiniimax probe amplifiers have a specified
operating temperature range from 5o C to 40o C, but the
N5441A probe head can withstand temperatures from –
55°C to +150°C for up to 250 test cycles. Use the extension
cables to physically separate the amplifier from the probe
head which allows you to operate the probe head inside a temperature chamber
while the probe amplifier remains outside the chamber.
CAUTION
None of the N2830/1/2A or N7000/1/2/3A 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.
CAUTION
Besides the N5441A probe head, none of the other probe heads are designed for
extreme temperature testing. For more information about the extreme temperature
probing solution for Keysight oscilloscopes, check out the Keysight data sheet with
the literature number, 5990-3504EN.
To ensure a high-quality measurement, the N5450B cable set have been
phase-matched at the factory. A coupling tag is included with the cables to ensure
the cables stay as a matched pair. To install the coupling tag, slip the small end of
each cable through the holes in the tag. The tag can be positioned anywhere along
the length of the cable and can withstand the temperature ranges specified.
32
InfiniiMax III+ Series Probes User’s Guide
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Using InfiniiMax III+ Series Probes
CAUTION
Avoid rapid changes in temperature that can lead to moisture accumulating in the
form of condensation on the probe components, as well as the DUT. If this occurs, wait
until the moisture has evaporated before making any measurements.
CAUTION
Additional care must be taken when handling probe heads used during extreme
temperature cycling because this process makes the probe heads less robust.
CAUTION
Secure the ends of the extension cable near the probe head in the temperature
chamber such that the probe head legs are not tugged or moved around significantly.
CAUTION
Prevent abrasion and tears in the cable’s jacket, do not rest the extension cables on
any metal objects or objects with sharp edges.
CAUTION
Do not kink the cables. The cables are designed to be flexible, but are not designed to
be bent sharply.
N OT E
Keep your extreme temperature testing probes separate from the probes that you use under
milder conditions. This is because cycling probe heads through extreme temperature ranges
has a marked affect on their lifetimes. Only the lifetime of the probe head is affected by
temperature cycling. The extension cables and probe amplifier should not need to be replaced
with extended temperature cycling.
N OT E
Discoloration or texture changes are possible with the extension cables. These changes do
not, however, affect the performance or the quality of a measurement.
N5449A high impedance adapter
The N5449A high impedance adapter includes one N2873A 10:1 passive probe.
The adapter is specifically tuned for the N2873A probe. Similar probes (1 ΜW
input) can be used. Other probes may not meet the bandwidth specification.
86100D sampling scope adapters
Two adapters are available for connecting probes to the Infiniium 86100D DCA-X
sampling oscilloscope or other RF instruments. The N1022B sampling scope
adapter allows you to connect N2830/1/2A probes. The N5477A sampling scope
adapter allows you to connect N7000/1/2A probes.
InfiniiMax III+ Series Probes User’s Guide
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Using InfiniiMax III+ Series Probes
Safety Information
This manual provides information and warnings essential for operating this probe
in a safe manner and for maintaining it in safe operating condition. Before using
this equipment and to ensure safe operation and to obtain maximum performance
from the probe, carefully read and observe the following warnings, cautions, and
notes.
This product has been designed and tested in accordance with accepted industry
standards, and has been supplied in a safe condition. The documentation contains
information and warnings that must be followed by the user to ensure safe
operation and to maintain the product in a safe condition.
Note the external markings on the probe that are described in this document.
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.
34
WARNING
Use Only Grounded Instruments.
Do not connect the probe’s ground lead to a potential other than earth ground.
Always make sure the probe and the oscilloscope are grounded properly.
WARNING
Connect and Disconnect Properly.
Connect the probe to the oscilloscope and connect the ground lead to earth ground
before connecting the probe to the circuit under test. Disconnect the probe input and
the probe ground lead from the circuit under test before disconnecting the probe
from the oscilloscope.
WARNING
Observe Probe Ratings.
Do not apply any electrical potential to the probe input which exceeds the maximum
rating of the probe. Make sure to comply with the voltage versus frequency derating
curve found in this manual.
WARNING
Indoor Use Only.
Do not operate in wet/damp environments. Keep product surfaces dry and clean.
WARNING
Do Not Operate With Suspected Failures. Refer to qualified service personnel.
WARNING
Never leave the probe connected to a conductor while it is not connected to an
oscilloscope or voltage measuring instrument.
InfiniiMax III+ Series Probes User’s Guide
1
Using InfiniiMax III+ Series Probes
WARNING
Do not use a probe which is cracked, damaged or has defective leads.
WARNING
Do not install substitute parts or perform any unauthorized modification to the
probe.
WARNING
Do not operate the probe or oscilloscope in the presence of flammable gasses or
fumes. Operation of any electrical instrument in such an environment constitutes a
definite safety hazard.
WARNING
Do not use the probe or oscilloscope in a manner not specified by the manufacturer.
WARNING
Service instructions are for trained service personnel. To avoid dangerous electric
shock, do not perform any service unless qualified to do so. Do not attempt internal
service or adjustment unless another person, capable of rendering first aid and
resuscitation, is present.
CAUTION
The probe cable is a sensitive part of the probe and, therefore, you should be careful
not to damage it through excessive bending or pulling. Avoid any mechanical shocks
to this product in order to guarantee accurate performance and protection.
Concerning the Oscilloscope or Voltage Measuring Instrument to Which
the Probe is Connected
WARNING
Whenever it is likely that the ground protection is impaired, you must make the
instrument inoperative and secure it against any unintended operation.
WARNING
If you energize the instrument by an auto transformer (for voltage reduction or
mains isolation), the ground pin of the input connector terminal must be connected
to the earth terminal of the power source.
WARNING
Before turning on the instrument, you must connect the protective earth terminal of
the instrument to the protective conductor of the (mains) power cord. The mains
plug shall only be inserted in a socket outlet provided with a protective earth
contact. You must not negate the protective action by using an extension cord
(power cable) without a protective conductor (grounding). Grounding one conductor
of a two-conductor outlet is not sufficient protection.
InfiniiMax III+ Series Probes User’s Guide
35
1
36
Using InfiniiMax III+ Series Probes
WARNING
Only fuses with the required rated current, voltage, and specified type (normal blow,
time delay, etc.) should be used. Do not use repaired fuses or short-circuited fuse
holders. To do so could cause a shock or fire hazard.
WARNING
Capacitors inside the instrument may retain a charge even if the instrument is
disconnected from its source of supply.
InfiniiMax III+ Series Probes User’s Guide
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Using InfiniiMax III+ Series Probes
Service
The following symptoms may indicate a problem with the probe or the way it is
used. The probe is a high frequency device with many critical relationships
between parts. For example, the frequency response of the amplifier on the hybrid
is trimmed to match the output coaxial cable. As a result, to return the probe to
optimum performance requires factory repair. If the probe is under warranty,
normal warranty services apply.
Probe calibration fails
Probe calibration failure with an oscilloscope is usually caused by improper setup.
If the calibration will not pass, check the following:
•
Check that the probe passes a waveform with the correct amplitude.
•
If the probe is powered by the oscilloscope, check that the offset is
approximately correct. The probe calibration cannot correct major failures.
•
Be sure the oscilloscope passes calibration without the probe.
Incorrect pulse response (flatness)
If the probe's pulse response shows a top that is not flat, check for the following:
•
Output of probe must be terminated into a proper 50W termination. If you are
using the probe with an Infiniium oscilloscope, this should not be a problem. If
you are using the probe with other test gear, insure the probe is terminated into
a low reflectivity 50W load (~ ±2%).
•
If the coax or coaxes of the probe head in use has excessive damage, then
reflections may be seen within ~ 1 ns of the input edge. If you suspect a probe
head, swap it with another probe head and see if the non-flatness problem is
fixed.
•
If the one of the components in the tip have been damaged there may be a
frequency gain non-flatness at around 40 MHz. If you suspect a probe head,
swap it with another probe head and see if the non-flatness problem is fixed.
Incorrect input resistance
The input resistance is determined by the probe head in use. If the probe head is
defective, damaged, or has been exposed to excessive voltage, the input resistor
may be damaged. If this is the case, the probe head is no longer useful. A new
probe head will need to be obtained either through purchase or warranty return.
InfiniiMax III+ Series Probes User’s Guide
37
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Using InfiniiMax III+ Series Probes
Incorrect offset
Assuming the probe head in use is properly functioning, incorrect offset may be
caused by defect or damage to the probe amplifier or by lack of probe calibration
with the oscilloscope.
Returning the probe for service
If the probe is found to be defective we recommend sending it to an authorized
service center for all repair and calibration needs. Perform the following steps
before shipping the probe back to Keysight Technologies for service.
1 Contact your nearest Keysight sales office for information on obtaining an RMA
number and return address.
2 Write the following information on a tag and attach it to the malfunctioning
equipment.
N OT E
•
Name and address of owner
•
Product model number (for example, N2830A)
•
Product Serial Number (for example, MYXXXXXXXX)
•
Description of failure or service required
Include probing and browsing heads if you feel the probe is not meeting performance
specifications or a yearly calibration is requested.
3 Protect the probe by wrapping in plastic or heavy paper.
4 Pack the probe in the original carrying case or if not available use bubble wrap
or packing peanuts.
5 Place securely in sealed shipping container and mark container as "FRAGILE".
N OT E
If any correspondence is required, refer to the product by serial number and model number.
Contacting 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.
38
InfiniiMax III+ Series Probes User’s Guide
Keysight InfiniiMax III+ Series Probes
User’s Guide
2 Using InfiniiMax III+ Probe
Heads
Recommended Configurations at a Glance 40
N5444A InfiniiMax III 2.92 mm/3.5 mm/SMA Probe Head 42
N5439A InfiniiMax III ZIF Probe Head 44
N5445A InfiniiMax III Differential Browser Probe Head 50
N5441A InfiniiMax III Solder-In Head 56
N2836A InfiniiMode Solder-In Head 59
N2848A QuickTip InfiniiMode Probe Head 64
Strain Relieving the Probe Heads 68
This chapter describes the various probe heads. The probe configurations are
listed in the order of the best performance to the least performance in terms of
bandwidth and input loading characteristics. The recommended configurations
are designed to give the best probe performance for different probing situations.
This allows you to quickly make the measurements you need with confidence in
the performance and signal fidelity. Using the recommended connection
configurations is your key to making accurate oscilloscope measurements with
known performance levels.
N OT E
Graphs showing the performance of the heads for each probe amplifier are shown in
Chapter 6,
39
2
Using InfiniiMax III+ Probe Heads
Recommended Configurations at a Glance
Table 7
Configurations at a Glance (Sheet 1 of 2)
Recommended BW
Order of Use
(GHz)
Cdiff *
(pF)
Cse †
(pF)
Usage
N5444A InfiniiMax III 2.92 mm Head (Refer to page 42.)
N2830A: 4
N2831A: 8
N2832A: 13
N7000A: 8
N7001A: 13
N7002A: 16
N7003A: 20
—
—
Differential and Single-ended signals
InfiniiMode compatible
For cabled measurements. Can terminate to a non-ground
voltage.
N5439A InfiniiMax III ZIF Head (Refer to page 44.)
N2830A: 4
N2831A: 8
N2832A: 13
N7000A: 8
N7001A: 13
N7002A: 16
N7003A: 20
32 fF
44 fF
Single-ended signals only
Solder-in hands free connection when physical size is critical
Extremely low loading measurement with N5440A/47A ZIF tips
Hard to reach targets
Very small fine pitch targets
N5445A InfiniiMax III Browser (Refer to page 50.)
N2830A: 4
N2831A: 8
N2832A: 13
N7000A: 8
N7001A: 13
N7002A: 16
N7003A: 20
35 fF
50 fF
Differential and Single-ended signals
General purpose troubleshooting of signals
Handheld browing
Variable pitch spacing from 20 mil to 125 mil
N5441A InfiniiMax III Solder-In Head (Refer to page 56.)
N2830A: 4
N2831A: 8
N2832A: 13
N7000A: 8
N7001A: 13
N7002A: 16
N7003A: 20
40
77 fF
105 fF
Differential and Single-ended signals
Economical semi-permanent connection
Extreme Temperature
InfiniiMax III+ Series Probes User’s Guide
Using InfiniiMax III+ Probe Heads
Table 7
2
Configurations at a Glance (Sheet 2 of 2)
Recommended BW
Order of Use
(GHz)
Cdiff *
(pF)
Cse †
(pF)
Usage
N2836A InfiniiMode Solder-In Head (Refer to page 59.)
N2830A: 4
N2831A: 8
N2832A: 13
N7000A: 8
N7001A: 13
N7002A: 16
N7003A: 20
108 fF
140 fF
Differential and Single-ended signals
InfiniiMode Compatible
Solder-in hands free connection
200 fF
Differential and Single-ended signals
InfiniiMode Compatible
Easy head-to-tip connection in tight space
Solder-in hands free connection
N2848A QuickTip Head (Refer to page 64.)
N2830A: 4
N2831A: 8
N2832A: >12
N7000A: 8
N7001A: 13
N7002A: 16
N7003A: >16
340 fF
* Capacitance seen by differential signals
† Capacitance seen by single-ended signals
InfiniiMax III+ Series Probes User’s Guide
41
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Using InfiniiMax III+ Probe Heads
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.
The N5444A provides for a termination to a
common DC voltage rather than to ground, which
is required for many signal standards. It is
implemented such that from DC to approximately
1 kHz, the termination is 55 Ohms to the
termination voltage, and above approximately
10 kHz, the termination is 50 Ohms to 0.9 times the
termination voltage. The termination voltage range
is ±4V with a minimum step of 5 mV and a
maximum current of 80 mA. The termination
voltage can be controlled internally by the
oscilloscope or applied externally using the supplied DC jack.
Table 8
Bandwidth
Probe Amplifier
BW
Probe Amplifier
BW
N2830A
4 GHz
N7000A
8 GHz
N2831A
8 GHz
N7001A
13 GHz
N2832A
13 GHz
N7002A
16 GHz
N7003A
20 GHz
Figure 22 N5444A InfiniiMax III 2.92mm/3.5mm/SMA Probe Head
42
InfiniiMax III+ Series Probes User’s Guide
2
Using InfiniiMax III+ Probe Heads
N OT E
For performance plots, refer to Chapter 6, “Performance Plots.
N5448A Head Flex Cables
Order N5448A 2.92 mm head flex cables (10” or 25 cm long) to extend the cable
length and add convenience. Figure 23 on page 43 shows the N5448A cables
attached to the N5444A probe head. You must first remove the supplied rigid
cables before connecting the N5448A cables.
Figure 23 N5444A with N5448A Head Flex Cables Attached
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 "—"
input connector during the calibration. The latest Infiniium firmware includes
instructions on the Probe Calibration dialog box to remind you to install the
adapter. If the Infiniium oscilloscope's firmware is older than version 5.50.33, you
can still attach the adapter and the resulting calibration will be valid.
InfiniiMax III+ Series Probes User’s Guide
43
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Using InfiniiMax III+ Probe Heads
N5439A InfiniiMax III ZIF Probe Head
The N5439A Zero Insertion Force (ZIF) probe head
supports the three types of economical replaceable
tips that are shown in Table 10. 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.
Table 9
Bandwidth
Probe Amplifier
BW
Probe Amplifier
BW
N2830A
4 GHz
N7000A
8 GHz
N2831A
8 GHz
N7001A
13 GHz
N2832A
13 GHz
N7002A
16 GHz
N7003A
20 GHz
Table 10 Available ZIF Tips
ZIF Tip
Description
Variable Tip Spacing
Qty
N2838A
25 GHz 450W PC board tip provides robust design with
high bandwidth.
5 mil to 250 mil
(0.127 mm to 6.35 mm)
5
N5440A
28 GHz 450W ceramic
(normal sensitivity) for
extremely low probe
loading.
5 mil to 80 mil
(0.127 mm to 2 mm)
5
N5447A
The N5447A ZIF tip is not
compatible with the
N2830/1/2A or
N7000/1/2/3A probes.
Compatible only with
InfiniiMax III N2800/1/2/3A
probes.
5 mil to 80 mil
(0.127 mm to 2 mm)
5
44
InfiniiMax III+ Series Probes User’s Guide
Using InfiniiMax III+ Probe Heads
N OT E
The N5439A does not include any ZIF tips. You must order either the N2838A or N5440A in
addition to N5439A.
N OT E
The N5447A ZIF tip is not compatible with N2830/1/2A or N7000/1/2/3A probes.
N OT E
N OT E
2
To install or repair N2838A resistor leads, refer to “Replacing Axial Resistor
Tips" on page 72.
For performance plots, refer to Chapter 6, “Performance Plots.
Ensuring maximum N2838A tip performance
The specifications and performance plots of the N2838A ZIF tip were measured
with a nominal spacing of 40 mil (1 mm). In order to achieve the proper response
as shown in the performance plots, keep the mini-axial lead resistors roughly
parallel as shown in Figure 47, and use the tip wires on the mini-axial leads to get
the desired span.
If you need to position the resistors different than shown in this figure (that is,
resistor bodies close together or spread apart), use N2807A and N2808A
PrecisionProbe products to perform an AC calibration of the probe, which properly
captures the response. Increasing the spacing to 250 mil degrades the
performance some, but PrecisionProbe can be used to compensate or qualify the
effect.
Figure 24 Proper Position of Resistors
Soldering a ZIF tip to the DUT
Before using the following procedure, refer to “Soldering Tips" on page 70.
CAUTION
The ceramic ZIF tips are very fragile. They must be manufactured in this way in order to
meet the high-performance, high bandwidth applications they are intended for. Be
extremely careful when handling.
InfiniiMax III+ Series Probes User’s Guide
45
2
Using InfiniiMax III+ Probe Heads
1 Break off a ZIF tip/handle combination from the packaging holder at the point
shown in the figure.
Figure 25 Five ZIF Tips on Packaging
2 Flux and tin the leads on the target DUT.
Figure 26 Preparing the DUT Leads
3 While holding the plastic form, form the ZIF tip wires to match the DUT’s pitch
and angle.
4 Flux the ZIF tip wires and DUT leads.
5 Position the ZIF tip with the gold traces facing up as shown in Figure 27 on
page 47 and carefully re-flow the solder. This orients the tip so that it will
properly mate with the probe head.
N OT E
CAUTION
46
When soldering the tip to your DUT, use the tip handle to hold the tip. This allows you to
position these small tips without damaging them.
Do not dwell on this solder joint.
InfiniiMax III+ Series Probes User’s Guide
2
Using InfiniiMax III+ Probe Heads
Figure 27 Soldering the ZIF Tip
6 Pull the ZIF handle from the ZIF tip in the direction shown in Figure 28. ZIF tips
can be carefully handled with your fingertips and reinserted into a plastic
handle if necessary.
Figure 28 Removing the Handle from the ZIF Tip
7 You can connect ZIF tips to any of the locations on a DUT that you need to
probe. The probe head can be quickly moved between the tips.
CAUTION
Always mechanically strain-relieve the ZIF head before using to protect both your
probe accessories and DUT from damage. Refer to “Strain Relieving the Probe
Heads" on page 68.
CAUTION
Be careful not to damage the tip wires when handling the ZIF tips. Wires can be
carefully reshaped with tweezers or fingers if necessary.
Connecting the probe head to the ZIF tip
1 Add strain relieve for the ZIF probe head as described in “Strain Relieving the
Probe Heads" on page 68.
2 Form the coaxial cables to bring the probe head near the tip. Press the lever
down on the ZIF probe head (see Figure 29) and slide the probe head onto the
tip. Pressing on this lever removes the clamping force of the connector and
enables you to insert or remove ZIF tips.
InfiniiMax III+ Series Probes User’s Guide
47
2
Using InfiniiMax III+ Probe Heads
CAUTION
Stop if you encounter any resistance at all when sliding the probe head over the ZIF
tip. Check your alignment, make sure the lever is pressed, and try again. Inserting the
ZIF tip should require “zero” insertion force.
CAUTION
Always use the lever when inserting or removing ZIF tips.
Figure 29 Probe Head with Location of the Lever
Figure 30 Probe Head Connected to a Soldered ZIF Tip
N OT E
For more repeatable results, orient the probe connection perpendicular to the device as
shown in Figure 31 on page 49.
3 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.
48
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2
Figure 31 Probe Oriented Perpendicular to Device
InfiniiMax III+ Series Probes User’s Guide
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Using 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).
The span between the signal tips is easily adjusted with a
thumb wheel on the browser (see Figure 32).
Table 11 Bandwidth
N OT E
Probe Amplifier
BW
Probe Amplifier
BW
N2830A
4 GHz
N7000A
8 GHz
N2831A
8 GHz
N7001A
13 GHz
N2832A
13 GHz
N7002A
16 GHz
N7003A
20 GHz
For performance plots, refer to Chapter 6, “Performance Plots.
Figure 32 N5445A InfiniiMax III Differential Browser Head
Using the LED headlights
The browser’s tip includes an LED headlight that illuminates the probing area for
better visibility. The headlight intensity can be controlled from the oscilloscope’s
Probe Amplifier dialog box when using an N2830/1/2A or N7000/1/2/3A probes.
On N7000/1/2/3A probes, you can also use the Light button. Pressing and holding
this button will ramp the intensity of the headlight.
50
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Figure 33 Headlight Intensity from N7000/1/2/3A Light Button or Dialog Box
Adjusting the tip span
Turn the browser’s thumb wheel (see Figure 34) to adjust the tip spacing from 20
to 125 mil (0.5 mm to 3.1 mm). Do not force the adjustment near the end of its
range.
Figure 34 Adjusting the Tip Span
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Using InfiniiMax III+ Probe Heads
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:
1 Adjust the browser’s tip span for your measurement.
2 Locate the tip-span gauge on the browser’s protective cap as shown in
Figure 35.
3 Determine which of the three possible tip-span settings most closely matches
the browser’s tip span.
Figure 35 Tip Span Gauge on Browser Protective Cap
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 36 below shows the dimensions of
these mounting holes.
Figure 36 Dimensions of Mounting Holes
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Using InfiniiMax III+ Probe Heads
Probe along the browser’s axis
To prevent tip damage, probe along the browser’s axis as shown in Figure 37. Hold
the probe vertical and perpendicular to the circuit board.
Figure 37 Proper Probe Handling
CAUTION
To avoid damaging the browser’s tips, do not apply a side load to the browser.
Figure 38 Improper Probe Handling
CAUTION
Do not apply too much force when browsing. The weight of the probe in your hand
should be sufficient. The axial travel of the probe is about 15 mils (0.4 mm).
CAUTION
The browser’s protective cap should be kept on the browser at all times except when
probing.
CAUTION
Always remove the browser from the device under test (DUT) before disconnecting the
probe amp from the oscilloscope.
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Using InfiniiMax III+ Probe Heads
Replaceable parts
Figure 39 shows the replaceable parts for th N5445A.
Figure 39 Browser Tips and Ground Blade
Table 12 N5445A Replaceable Parts
Description
Qty
Part Number
Browser tips
4
N5476A
Ground Blade
1
N4855A
Ground Blade Screws
1
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. Use the following steps to position the probe using the N2787A:
1 Lock the vertical compliance of the probe positioner.
2 Clamp the browser into the positioner, aligning the browser’s slot with the
positioner’s gripping pad.
3 While holding the browser, loosen the main knob and position the probe.
4 Use the browser’s own weight to depress the tips, and tighten the main knob to
lock the probe’s position.
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Figure 40 Using the Browser with the N2787A 3D Probe Positioner
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Using InfiniiMax III+ Probe Heads
N5441A InfiniiMax III Solder-In 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 to 80 mil (0.127 mm to 2 mm).
The N5441A probe head can be used with the
N5450B InfiniiMax extreme temperature extension
cable. This is the only InfiniiMax III probe head that
can withstand the –55°C to +150°C extreme
temperature range (for up to 250 test cycles).
Table 13 Bandwidth
CAUTION
Probe Amplifier
BW
Probe Amplifier
BW
N2830A
4 GHz
N7000A
8 GHz
N2831A
8 GHz
N7001A
13 GHz
N2832A
13 GHz
N7002A
16 GHz
N7003A
20 GHz
When using the N5450B extension cable, do not subject the InfiniiMax III probe
amplifier or probe head (other than the N5441A solder-in probe head) to extreme
temperatures.
Replaceable parts
Extra wire (for solder-in probe head only). 01169-81301 (7 mil), 01169-21306
(5 mil)
N OT E
CAUTION
56
To install or repair N2838A resistor leads, refer to “Replacing N5441A Probe Head
Wires" on page 76.
The wires on the N5441A are fragile. They must be manufactured in this way in order
to meet the high-performance, high bandwidth applications they are intended for. Be
careful when handling.
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2
Soldering the probe head to the DUT
Before using the following procedure, refer to “Soldering Tips" on page 70.
To solder the probe head to your DUT, complete the following steps. The
procedure is very similar to that for the ZIF probe tips used with the N5439A probe
head.
1 Position the probe head near the location on the DUT where you want to solder
the probe.
2 Add strain relieve for the probe head as described in “Strain Relieving the
Probe Heads" on page 68.
3 Apply flux to your target leads as shown in Figure 41.
Figure 41 Applying Flux
4 Tin the leads with a small amount of solder.
Figure 42 Tin the Leads
5 Use tweezers to form the probe head wires to fit your DUT’s geometry.
6 Flux the DUT leads and your probe head wires.
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Using InfiniiMax III+ Probe Heads
Figure 43 Applying Flux to Leads and Wires
7 Position the probe head wires on the DUT leads and quickly re-flow the solder
as shown in Figure 44.
CAUTION
Do not leave the iron in contact with the probe head for more than a few seconds at a
time.
Figure 44 Positioning Wires
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N2836A InfiniiMode Solder-In Head
The N2836A InfiniiMax III solder-in probe head
(26 GHz) is an economical semi-permanent
connection. This is an InfiniiMode probe head (like
the N2848A) which allows you to make differential,
common mode, and single ended measurements
without having to re-solder the tip leads. Because
this is an InfiniiMode compatible head, the tip has
two signal leads and two ground leads. To learn
about InfiniiMode, refer to “To Use InfiniiMode" on
page 22.
The ground leads have minimal effect on differential measurements. However, if
you are making only differential measurements you can optionally cut off the
ground leads or fold them out of the way. If you have older N2836A probe heads,
you can easily add ground leads.
The variable span of the tip leads ranges from 5 mil to 250 mil (0.127 mm to
6.35 mm).
Table 14 Bandwidth
N OT E
N OT E
Probe Amplifier
BW
Probe Amplifier
BW
N2830A
4 GHz
N7000A
8 GHz
N2831A
8 GHz
N7001A
13 GHz
N2832A
13 GHz
N7002A
16 GHz
N7003A
20 GHz
To install or repair N2838A resistor leads, refer to “Replacing Axial Resistor
Tips" on page 72.
For performance plots, refer to Chapter 6, “Performance Plots.
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Using InfiniiMax III+ Probe Heads
Figure 45 Probe Head Connection to DUT (InfiniiMode)
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Figure 46 Probe Head Connection to DUT (Non-InfiniiMode)
Ensuring maximum performance
The specifications and performance plots of the N2836A probe head were
measured with a nominal spacing of 40 mil (1 mm). In order to achieve the proper
response as shown in the performance plots, keep the mini-axial lead resistors
roughly parallel as shown in Figure 47, and use the tip wires on the mini-axial
leads to get the desired span.
Figure 47 Proper Position of Resistors
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 N2807A
and N2808A PrecisionProbe products to perform an AC calibration of the probe.
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Using InfiniiMax III+ Probe Heads
The AC calibration will properly capture the response. Increasing the spacing to
250 mil will degrade the performance some, but Precision Probe can be used to
compensate or qualify the effect.
CAUTION
The axial resistors on the N2836A solder-in probe head are fragile. They must be
manufactured in this way in order to meet the high-performance, high bandwidth
applications they are intended for. Be careful when handling.
Soldering the probe head to the DUT
Before using the following procedure, refer to “Soldering Tips" on page 70.
To solder the probe head to your DUT, complete the following steps. The
procedure is very similar to that for the ZIF probe tips used with the N5439A probe
head. This procedure does not show soldering the ground leads, but the same
techniques are used.
1 Apply flux to your target leads as shown in Figure 48.
Figure 48 Applying Flux
2 Tin the leads with a small amount of solder.
Figure 49 Tin the Leads
3 Use tweezers to form the probe head wires to fit your DUT’s geometry.
4 Flux the DUT leads and your probe head wires.
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Figure 50 Applying Flux to Leads and Wires
5 Position the probe head wires on the DUT leads and quickly re-flow the solder
as shown in Figure 51.
CAUTION
Do not leave the iron in contact with the probe head for more than a few seconds at a
time.
Figure 51 Positioning Wires
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N2848A QuickTip InfiniiMode Probe Head
The N2848A QuickTip probe head is used with an
N2849A QuickTip and together they provide the
following advantages:
•
InfiniiMode on InfiniiMax III+ (N2830/1/2A and
N7000/1/2/3A probe amplifiers). InfiniiMode
allows you to make differential, common mode,
and single ended measurements without having
to re-solder the tip leads.
•
Easy-to-make secure magnetic mechanical
connection between the probe head and
QuickTip. Three magnets in the head connect the two sides of a differential
signal and a ground. No latch lever is used!
Figure 52 Magnet Connections in Probe Head
•
Extreme temperature environments such as temperature chambers.
Table 15 Bandwidth
Probe Amplifier
BW
Probe Amplifier
BW
N2830A
4 GHz
N7000A
8 GHz
N2831A
8 GHz
N7001A
13 GHz
N2832A
>12 GHz
N7002A
16 GHz
N7003A
>16 GHz
Permanently solder any number of QuickTips to your DUT as shown in Figure 53
on page 65. Because the probe head is magnetically connected (instead of
mechanically connected) to the QuickTip, you can effortlessly connect and
disconnect to each QuickTip. For best performance, position the QuickTip
vertically on the DUT. Because this is an InfiniiMode compatible head, the tip has
two signal leads and two ground leads. To learn about InfiniiMode, refer to “To Use
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2
InfiniiMode" on page 22. The ground leads have minimal effect on your differential
measurements. However, if you are making only differential measurements you
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 53 Probing with the N2848A Probe Head and QuickTip
N OT E
N2849A QuickTips are also compatible with N2851A QuickTip Probe Heads, which are designed for
1130/1/2/4A InfiniiMax I and 1168/9A InfiniiMax II probes.
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Using InfiniiMax III+ Probe Heads
CAUTION
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.
N OT E
The N2848A does not include any N2849A QuickTips. The N2849A must be ordered
separately.
N OT E
Before connecting the QuickTip head to the tip, use the tack-putty (N5439-65201) included
with the N2848A QuickTip probe head or the N2787A 3D probe positioner for securing the
probe amplifier to a rigid body near the DUT.
N OT E
For performance plots, refer to Chapter 6, “Performance Plots.
Connecting a QuickTip to the DUT
Use the following tips when soldering the QuickTips to your DUT:
66
•
Orient the QuickTip vertically as shown in Figure 53 on page 65.
•
Solder the four leads to vias or surfaces.
CAUTION
Always mechanically strain-relieve the QuickTip head before using to protect both
your probe accessories and DUT from damage. Refer to “Strain Relieving the
Probe Heads" on page 68.
N OT E
Resistor and wire leads on the QuickTip are factory trimmed to the proper length for use.
Adding wire length to the tip of the mini-axial lead resistors or to the ground leads will
degrade the performance of the probe.
N OT E
Soldering the ground wires is not required when making differential or single-ended (+ or –
leads) measurements.
•
When soldering to a via, always trim the lead close to the via’s underside.
•
If a lead is to be soldered to a surface and not a via, make a stronger solder joint
by bending the end of the lead 90°. For signal leads, bend the wire
approximately half way between the resistor and the end of the wire. Bend the
ground leads at about the same distance.
CAUTION
Be careful not to damage the tip wires when handling the QuickTips. Wires can be
carefully reshaped with tweezers or fingers if necessary.
CAUTION
The QuickTips are very fragile. They must be manufactured in this way in order to meet
the high-performance, high bandwidth applications they are intended for. Be
extremely careful when handling.
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Using InfiniiMax III+ Probe Heads
2
Cleaning the Magnetic Connections
If the three magnetic connections in the head become dirty, clean the connections
using the following steps:
1 Use compressed air or a cloth to remove any loose dirt.
2 Gently rub a small piece of tack putty (supplied with the probe) against the
magnetic connections to clean off any remaining surface grime.
Figure 54 N2848A Head Before and After Cleaning
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Strain Relieving the Probe Heads
High-performance probes have small physical geometries to ensure the lowest
possible loading and best electrical response. Because of their small size, probing
accessories are often delicate. It is important to mechanically secure your probes
to protect both your equipment and designs from damage. Although tack putty
and low-temperature hot glue are recommended, you can also use other methods
such as tape or hook-and-loop strain relief. Keep in mind that different accessories
have different cable stiffness. You should choose a strain relief method appropriate
for the cable stiffness. For instance, it is best to secure the stiffer N5439A near the
SMP connectors and form the cable to the optimal location.
CAUTION
Do not kink cables. Do not crush cables. Do not use aggressive adhesives or high
temperatures.
Tack-putty
Keysight recommends the use of tack putty for securing both probe heads and
amplifiers. Tack putty can be ordered using part number N5439-65201. Wrap a
small amount of tack-putty around your probe head cables, taking care to not
pinch them. The mass can then be secured to a rigid body neat your DUT.
Similar techniques can be used to secure probe amplifiers where you apply some
tack-putty to the underside of the probe amplifier body and attach it to a rigid
body near your DUT.
Figure 55 Probe Secured Using Tack Putty
You can also use putty with a positioner, such as the N2787A as shown in
Figure 56.
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Figure 56 Using Putty With the N2787A 3D Probe Positioner
The same positioner can also be used to support your probe amplifier as shown in
Figure 40 on page 55.
Low-temperature hot glue
You can also use low-temperature hot glue to secure cables.
CAUTION
Only use low-temperature hot glue. To remove the hot glue, warm it with a heat gun
set on low. Only heat the hot glue enough to remove it.
Figure 57 Probe Secured Using Low-Temperature Hot Glue
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Soldering Tips
When using the N5441A and N2836A solder-in heads and N5439A ZIF probe
heads, be sure to observe the following guidelines. For more information, refer to
the user’s guide.
•
Use a temperature-controlled soldering iron station, if possible.
•
Set the temperature of the soldering iron’s tip to between 370° C and 420° C
(for non RoHS standards).
•
Use the smallest tip possible.
•
Use an optical aid of some sort (microscope preferred).
•
Employ minimal dwell times on the solder joint (< 2 seconds).
•
Solder only the tip of the wire onto your DUT. The solder should not get close to
the existing solder ball on the tip.
•
Use enough flux when soldering the tips into a DUT.
Figure 58 Applying Flux to Leads and Wires
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User’s Guide
3 Maintaining Probe Heads
Replacing Axial Resistor Tips 72
Replacing N5441A Probe Head Wires
76
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:
CAUTION
•
N2836A probe heads
•
N5441A probe heads
•
N2838A ZIF tips
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.
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3
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.
These resistors can become worn or damaged with use. Order the replacement
axial resistor kit (N2836-68701) which provides 10 resistors.
N OT E
The pictures in the following procedure show the N2836A solder-in probe head, but the same
procedure applies to the N2838A ZIF tip.
Recommended equipment
CAUTION
•
Vise or clamp for holding tip.
•
Metcal STTC-022 (600 °C) or STTC-122(700 °C) tip soldering iron or equivalent.
The 600 °C tip will help limit burning of the FR4 tip PC board.
•
0.381 mm (0.015 in) diameter RMA flux standard tin/lead solder wire.
•
Fine stainless steel tweezers.
•
Rosin flux pencil, RMA type (Kester #186 or equivalent).
•
Diagonal cutters.
•
Magnifier or low power microscope.
•
Ruler.
As the probe heads and tips are easily damaged, only experienced soldering
technicians should attempt this repair.
Procedure
1 As shown in Figure 59, clamp the probe head or ZIF tip in a vise. Tweezers can
be used to hold the probe head or ZIF tip away from the vise. When using
tweezers, grip the tip either on the sides or top and bottom.
CAUTION
72
When tightening the vise, use light force to avoid damaging the solder-in probe head.
InfiniiMax III+ Series Probes User’s Guide
Maintaining Probe Heads
3
Figure 59 Clamping the Part
2 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 60 Removing the Resistor
N OT E
Clean the soldering iron tip of any excess solder before using.
N OT E
The solder joint has very low thermal mass so the joint will quickly melt and release.
CAUTION
To limit burning and damage to the PC board, do not keep the soldering iron in contact
with the tip any longer than is necessary.
CAUTION
Excessive dwell time with the iron will permanently damage the flip-chip resistor.
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3
Maintaining Probe Heads
3 Use the soldering iron and solder to fill the holes in preparation for mounting
the new resistors (or wires).
CAUTION
Do not leave the iron in contact with the tip any longer than necessary.
4 Use the flux pencil to coat the solder joint area with flux.
5 Locate the trim gauge which is supplied with the N2836-68701 replacement
axial resistor kit.
a
Place a resistor over the lead length gauge shown in Figure 61. Trim the
leads to match the drawing. The orientation of the lead is not important.
b Place a resistor over the bend gauge and bend the leads to match the
drawing. This bend fits in the hole in the tip’s PC board.
Figure 61 Trim Guage
6 Holding the resistor lead or wire in one hand and soldering iron in the other,
position the end of the resistor lead (after the 90 degree bend) over the solder
filled hole.
Figure 62 Soldering in a new axial resistor
7 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.
CAUTION
N OT E
74
Remove the soldering iron as soon as the lead falls into the hole.
Because the thermal mass of the joint is very small, extra dwell time with the soldering iron is
not needed to ensure a good joint.
InfiniiMax III+ Series Probes User’s Guide
Maintaining Probe Heads
3
8 Using a digital volt meter, measure the resistance from the coax center
conductor to the resistor tip. The DC resistance should measure 450 ohms.
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Maintaining Probe Heads
Replacing N5441A Probe Head Wires
Use the following procedure to install or replace the wire leads on the N5441A
solder-in probe head. Depending on your probing application, you can order either
5 mil or 7 mil wire as listed in the following table. For example, use the 5 mil wire
for attaching to small vias.
Table 16 Required Wire Type
Wire Diameter
Part Number
0.007 inch (tin-plated nickel wires)
01169-81301
0.005 inch (tin-plated nickel wires)
01169-21306
Table 17 Recommended Equipment
Equipment
Vise or clamp for holding tip
Metcal STTC-022 (600 °C) or STTC-122 (700 °C) tip soldering iron or equivalent. The 600 °C tip will help limit burning of the
FR4 tip PC board.
0.381 mm (0.015 in) diameter RMA flux standard tin/lead solder wire
Fine stainless steel tweezers
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
1 Use the vise or clamp to position the tip an inch or so off the work surface for
easy access.
CAUTION
76
If using a vise, grip the tip on the sides with light force. When tightening the vise, use
light force to avoid damaging the solder-in probe head If using a tweezers clamp, grip
the tip either on the sides or at the top and bottom.
InfiniiMax III+ Series Probes User’s Guide
Maintaining Probe Heads
3
Figure 63 Clamping the Probe Head
2 As shown in Figure 64, remove the old wires with tweezers while re-flowing the
solder from the underside of the probe.
CAUTION
Apply heat quickly to avoid damaging your probe.
Figure 64 Removing the Old Wire
3 If necessary, add a small amount of solder to the holes and apply flux.
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Maintaining Probe Heads
Figure 65 Adding Solder and Flux
4 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.
CAUTION
Do not dwell with the iron in contact with the probe head.
Figure 66 Adding a New Wire
Figure 67 New Wires Properly Attached
5 Trim any wire stubs on the probe head underside.
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Maintaining Probe Heads
Figure 68 Trim Wire Stubs
6 Use the included trim gauge to cut the wire lengths. Doing so ensures the best
performance from your probe head.
Figure 69 Trim Gauge Placed on Wires
Figure 70 Removing Excess Wire
7 Check the DC resistance of each probe leg when you have replaced the wires.
The correct resistance should be 450 ohms.
InfiniiMax III+ Series Probes User’s Guide
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3
80
Maintaining Probe Heads
InfiniiMax III+ Series Probes User’s Guide
Keysight InfiniiMax III+ Series Probes
User’s Guide
4 Calibration / Deskew
Procedure
The probe calibration and deskew is a guided procedure that you start from the
oscilloscope’s Probe Calibration dialog box. Depending on the oscilloscope model,
you will be instructed to connect the probe head to either of the following
oscilloscope outputs:
N OT E
CAUTION
•
Front-panel Probe Comp terminals
•
Aux Out BNC connector or Cal Out connector using the N5443A
Calibration/Deskew Fixture with 50W termination.
The N5443A fixture promotes the properly position the probe head during the procedure. If
you prefer, you can remove the plastic holder from the fixture by removing the four screws on
the bottom side of the holder.
Always wear an ESD wrist strap when working with active probes. Not doing so can
result in the probe becoming permanently damaged.
81
4
Calibration / Deskew Procedure
Procedure
1 Connect the probe to an oscilloscope channel.
2 On the oscilloscope menu, click Setup > Probe Calibration. If you have an
N7000/1/2/3A probe, you can press the probe’s Menu button instead to access
the guided calibration procedure.
3 In the dialog box, select the tab that represents the channel for the probe being
tested. In the dialog box, click Start Atten/Offset Cal….
4 The dialog box indicates that you can use the oscilloscope’s Probe Comp
terminals or the oscilloscope’s Cal Out or Aux Out connector for the calibration. If
you are using the Probe Comp, touch the probe head’s leads to the Probe Comp
terminals. If you are using the Cal Out (or Aux Out) connector, use the N5443A
fixture as shown in the following steps:
a
Connect a 50 ohm termination to the fixture as shown in Figure 71. The
termination is provided with the N5443A.
Figure 71 50W Terminator on N5443A
b As described in the dialog box, connect the fixture to the Cal Out or Aux Out
connector. Turn the nut on the Cal Out counter-clockwise to tighten as
shown in Figure 72.
c While holding the fixture upright with one hand, use an 8 in. lbs. torque
wrench to fully tighten the connector as shown in Figure 73.
d Detach the probe head from the probe and Insert the probe into the top of
the fixture holder as shown in Figure 74. The probe can slide up and down in
the holder to adjust the probe head position.
Figure 72 Attaching the N5443A Fixture
82
InfiniiMax III+ Series Probes User’s Guide
Calibration / Deskew Procedure
4
Figure 73 Tighten to 8 in. lbs.
Figure 74 Inserting the Probe Head
e Form the N5439A probe head ZIF tip wires as shown Figure 75. If you are
using the browser probe head, you do not need to adjust the shape of the
tips.
Figure 75 Forming the Probe Head’s Tip
f
Connect the probe head’s two lead cables to the probe amplifier as shown in
Figure 76.
InfiniiMax III+ Series Probes User’s Guide
83
4
Calibration / Deskew Procedure
Figure 76 Connect the Head to the Probe
g Position the probe head wires (if you are using the ZIF or Solder-in probe
heads) so they curl towards the scope as shown in Figure 77.
Figure 77 Positioning the Probe Head Wires
h While pressing down on the N5443A fixture’s spring-loaded clamps, insert
the probe wires beneath the clamps. The N5443A’s clamps, ground, and
signal path are identified in Figure 78.
84
N OT E
To check that the wires are connected correctly, press the oscilloscope’s autoscale button and
confirm that a stable step on screen. You will need to re-open the Probe Calibration dialog
box).
CAUTION
When connecting the probe head to the fixture, do not press down with much force or
you could snap off the fixture from the Cal Out or Aux Out connection. Light contact is
all that is needed for the calibration.
InfiniiMax III+ Series Probes User’s Guide
4
Calibration / Deskew Procedure
CAUTION
Never solder a probe tip to the thickfilm gold. The gold will immediately dissolve into
the solder and disappear.
Figure 78 Closeup of Fixture’s Signal Path, Ground, and Clamps
Figure 79 Clamping the Probe Head’s Leads
InfiniiMax III+ Series Probes User’s Guide
85
4
Calibration / Deskew Procedure
N OT E
If you are using the browser probe head, it is recommended that you
use the N2787A 3D Probe Positioner to hold the browser in place as
shown here. The browser uses spring-loaded tips so you do not need
much force to get a solid contact.
5 In the Probe Calibration dialog box, start the calibration.
6 When the calibration has completed, perform the skew calibration.
86
InfiniiMax III+ Series Probes User’s Guide
Keysight InfiniiMax III+ Series Probes
User’s Guide
5 Specifications and
Characteristics
N2830/1/2A Probe Amplifier Specifications and Characteristics 88
N2830/1/2A Probe Head Characteristics 90
N7000/1/2/3A Probe Amplifier Specifications and Characteristics 91
N7000/1/2/3A Probe Head Characteristics 93
Environmental 94
Safety and Regulatory Information 95
Probe Dimensions 96
All characteristics are the typical performance values of the InfiniiMax probes
using the InfiniiMax III+ probe amplifiers and each different probe head except
otherwise specified.
87
5
Specifications and Characteristics
N2830/1/2A Probe Amplifier Specifications and Characteristics
The characteristics listed in the Table 18 are mainly determined by the
N2830/1/2A probe amplifiers.
N OT E
All entries are characteristics unless otherwise noted. Bandwidth and DC input resistance (Rse
and Rdiff) are the only specifications.
Table 18 Probe Amplifier Characteristics (Sheet 1 of 2)
Item
N5439A, N5441A, N2836A, N2848A
Bandwidth (specification)
N2832A
N2831A
N2830A
With N5444A Probe Head
(2.92 mm, SMA, 3.5 mm)
13 GHz
8 GHz
4 GHz
DC Input Resistance (specification)
Rse = 50 kW ± 2% each input to ground
Rdiff = 100 kW ± 2%
Rcm = 25 kW ± 2% (characteristic)
55W to Vterm (characteristic)
Input Resistance (> 10 KHz)
Rse = 500W ± 2% each input to ground
Rdiff = 1 kW
Rcm = 250W
50W to 0.901 * Vterm
Input Voltage Range
(Differential or Single Ended)
2.5 Vpp or ±1.25V @ 5:1 attenuation
5.0 Vpp or ±2.50V @ 10:1 attenuation
2.5 Vpp or ±1.25V @ 5:1 attenuation
5.0 Vpp or ±2.50V @ 10:1 attenuation
without violating maximum input
power
Maximum Input Power
N/A
125 mW calculated with the following
equation for each input:
2
( rms ( V – V ) )
P max = --------------in-------term
--------55
Input Common Mode Range
±7 VDC to 100 Hz,
±1.25V > 100 Hz at 5:1 attenuation
±2.5V > 100 Hz at 10:1 attenuation
±6 VDC to 100 Hz,
±1.25V > 100 Hz at 5:1 attenuation
±2.5V > 100 Hz at 10:1 attenuation
without violating maximum input
power
DC Attenuation Ratio
5:1 or 10:1. Automatically selected based
on volts-per-division (all modes)
5:1 or 10:1. Automatically selected
based on volts-per-division (all
modes)
Offset Range (for probing a single-ended
signal)
±16V
±6V without violating maximum input
power
88
InfiniiMax III+ Series Probes User’s Guide
Specifications and Characteristics
5
Table 18 Probe Amplifier Characteristics (Sheet 2 of 2)
Item
N5439A, N5441A, N2836A, N2848A
Input Referred Noise Spectral Density
With N5444A Probe Head
(2.92 mm, SMA, 3.5 mm)
Diff 5:1 attenuation 33.5 nV/rt(Hz),
Diff 10:1 attenuation 53.9 nV/rt(Hz),
SE A or B 5:1 attenuation 27.8 nV/rt(Hz),
SE A or B 10:1 attenuation 47.7 nV/rt(Hz),
CM 5:1 attenuation 21.8 nV/rt(Hz),
CM 10:1 attenuation 38.4 nV/rt(Hz)
Input Referred Noise Example
4.5 mVrms in diff mode 5:1 attenuation
with ¡18 GHz probe head and N2832A
13 GHz probe amplifier
4.5 mVrms in diff mode 5:1
attenuation with 28 GHz N5444A
probe head and N2832A 13 GHz
probe amplifier
Maximum Input Voltage
18 Vpeak CAT 1
8 Vpeak without violating maximum
input power
InfiniiMax III+ Series Probes User’s Guide
89
5
Specifications and Characteristics
N2830/1/2A Probe Head Characteristics
The characteristics listed in the Table 19 are for the N2832A InfiniiMax III+ probe
amplifier using different probe heads. The characteristics are mainly determined
by the probe head. Performance with the lower bandwidth amplifiers (N2830/1A)
is the lower of the following values:
•
Amplifier BW, 0.434 / amplifier BW, 0.308 / amplifier BW
•
Bandwidth measured with the highest bandwidth amplifier (N2832A).
Table 19 Characteristics for Probe Heads Using N2832A
Probe Head
N5439A ZIF
Tip
Input Capacitance
Mode
Bandwidth
(–3 dB)
10 – 90%
Transition
Time
20 – 80%
Transition
Time
Cdiff
Cse
N5440A
450W ZIF
32 fF
44 fF
Differential:
Single Ended:
Common:
13 GHz
—
—
33.4 ps
—
—
23.7 ps
—
—
N2838A
450W ZIF
95 fF
130 fF
Differential:
Single Ended:
Common:
13 GHz
—
—
33.4 ps
—
—
23.7 ps
—
—
N5447A
200W ZIF
Not compatible with N2830/1/2A probes.
N5445A 450W Browser
35 fF
50 fF
Differential:
Single Ended:
Common:
13 GHz
—
—
33.4 ps
—
—
23.7 ps
—
—
N5441A 450W Solder-In
77 fF
105 fF
Differential:
Single Ended:
Common:
13 GHz
—
—
33.4 ps
—
—
23.7 ps
—
—
N2836A 450W Solder-In
Head vertically oriented with no
ground wires
108 fF
140 fF
Differential:
Single Ended:
Common:
13 GHz
—
—
33.4 ps
—
—
23.7 ps
—
—
N2836A 450W Solder-In
Head oriented flat with minimum
length ground wires
108 fF
140 fF
Differential:
Single Ended:
Common:
13 GHz
13 GHz
13 GHz
33.4 ps
33.4 ps
33.4 ps
23.7 ps
23.7 ps
23.7 ps
N2848A
QuickTip
200 fF
340 fF
Differential:
Single Ended:
Common:
13 GHz
13 GHz
13 GHz
33.4 ps
33.4 ps
33.4 ps
23.7 ps
23.7 ps
23.7 ps
—
—
Differential:
Single Ended:
Common:
13 GHz
13 GHz
13 GHz
33.4 ps
33.4 ps
33.4 ps
23.7 ps
23.7 ps
23.7 ps
N5444A
2.92, 3.5 mm, SMA
90
N2849A
450W QuickTip
InfiniiMax III+ Series Probes User’s Guide
Specifications and Characteristics
5
N7000/1/2/3A Probe Amplifier Specifications and Characteristics
The characteristics listed in the Table 20 are mainly determined by the
N7000/1/2/3A probe amplifiers.
N OT E
All entries are characteristics unless otherwise noted. Bandwidth and DC input resistance (Rse
and Rdiff) are the only specifications.
Table 20 Probe Amplifier Characteristics (Sheet 1 of 2)
Item
N5439A, N5441A, N2836A, N2848A
Bandwidth (specification)
N7003A
N7002A
N7001A
N7000A
With N5444A Probe Head
(2.92 mm, SMA, 3.5 mm)
20 GHz
16 GHz
13 GHz
8 GHz
DC Input Resistance (specification)
Rse = 50 kW ± 2% each input to ground
Rdiff = 100 kW ± 2%
Rcm = 25 kW ± 2% (characteristic)
55W to Vterm (characteristic)
Input Resistance (> 10 kHz)
Rse = 500W ± 2% each input to ground
Rdiff = 1 kW
Rcm = 250W
50W to 0.901 * Vterm
Input Voltage Range
(Differential or Single Ended)
2.5 Vpp or ±1.25V @ 5:1 attenuation
5.0 Vpp or ±2.50V @ 10:1 attenuation
2.5 Vpp or ±1.25V @ 5:1 attenuation
5.0 Vpp or ±2.50V @ 10:1 attenuation
without violating maximum input
power
Maximum Input Power
N/A
125 ,mW calculated with the
following equation for each input:
2
( rms ( V – V ) )
P max = --------------in-------term
--------55
Input Common Mode Range
±7 VDC to 100 Hz,
±1.25V > 100 Hz at 5:1 attenuation
±2.5V > 100 Hz at 10:1 attenuation
±6 VDC to 100 Hz,
±1.25V > 100 Hz at 5:1 attenuation
±2.5V > 100 Hz at 10:1 attenuation
without violating maximum input
power
DC Attenuation Ratio
5:1 or 10:1. Automatically selected based
on volts-per-division (all modes)
5:1 or 10:1. Automatically selected
based on volts-per-division (all
modes)
Offset Range (for probing a single-ended
signal)
±16V
±6V without violating maximum input
power
InfiniiMax III+ Series Probes User’s Guide
91
5
Specifications and Characteristics
Table 20 Probe Amplifier Characteristics (Sheet 2 of 2)
Item
N5439A, N5441A, N2836A, N2848A
Input Referred Noise Spectral Density
With N5444A Probe Head
(2.92 mm, SMA, 3.5 mm)
Diff 5:1 attenuation 33.5 nV/rt(Hz),
Diff 10:1 attenuation 53.9 nV/rt(Hz),
SE A or B 5:1 attenuation 27.8 nV/rt(Hz),
SE A or B 10:1 attenuation 47.7 nV/rt(Hz),
CM 5:1 attenuation 21.8 nV/rt(Hz),
CM 10:1 attenuation 38.4 nV/rt(Hz)
Input Referred Noise Example
4.5 mVrms in diff mode 5:1 attenuation
with ¡18 GHz probe head and N7001A
13 GHz probe amplifier
4.5 mVrms in diff mode 5:1
attenuation with 28 GHz N5444A
probe head and N7001A 13 GHz
probe amplifier
Maximum Input Voltage
18 Vpeak CAT 1
8 Vpeak without violating maximum
input power
92
InfiniiMax III+ Series Probes User’s Guide
Specifications and Characteristics
5
N7000/1/2/3A Probe Head Characteristics
The characteristics listed in the Table 21 are for the N7003A InfiniiMax III+ probe
amplifier using different probe heads. The characteristics are mainly determined
by the probe head. Performance with the lower bandwidth amplifiers
(N7000/1/2A) is the lower of the following values:
•
Amplifier BW, 0.434 / amplifier BW, 0.308 / amplifier BW
•
Bandwidth measured with the highest bandwidth amplifier (N7003A).
Table 21 Characteristics for Probe Heads Using N7003A
Probe Head
N5439A ZIF
Tip
Input Capacitance
Mode
Bandwidth
(–3 dB)
10 – 90%
Transition
Time
20 – 80%
Transition
Time
Cdiff
Cse
N5440A
450W ZIF
32 fF
44 fF
Differential:
Single Ended:
Common:
20 GHz
—
—
21.7ps
—
—
15.4 ps
—
—
N2838A
450W ZIF
95 fF
130 fF
Differential:
Single Ended:
Common:
20 GHz
—
—
21.7 ps
—
—
15.4 ps
—
—
N5447A
200W ZIF
Not compatible with N7000/1/2/3A probes.
N5445A 450W Browser
35 fF
50 fF
Differential:
Single Ended:
Common:
20 GHz
—
—
21.7 ps
—
—
15.4 ps
—
—
N5441A 450W Solder-In
77 fF
105 fF
Differential:
Single Ended:
Common:
20 GHz
—
—
21.7 ps
—
—
15.4 ps
—
—
N2836A 450W Solder-In
Head vertically oriented with no
ground wires
108 fF
140 fF
Differential:
Single Ended:
Common:
20 GHz
—
—
21.7 ps
—
—
15.4 ps
—
—
N2836A 450W Solder-In
Head oriented flat with minimum
length ground wires
108 fF
140 fF
Differential:
Single Ended:
Common:
20 GHz
20 GHz
20 GHz
21.7 ps
21.7 ps
21.7 ps
15.4 ps
15.4 ps
15.4 ps
N2848A
QuickTip
200 fF
340 fF
Differential:
Single Ended:
Common:
20 GHz
20 GHz
20 GHz
21.7 ps
33.4 ps
33.4 ps
15.4 ps
23.7 ps
23.7 ps
—
—
Differential:
Single Ended:
Common:
20 GHz
20 GHz
20 GHz
21.7 ps
21.7 ps
21.7 ps
15.4 ps
15.4 ps
15.4 ps
N2849A
450W QuickTip
with minimum
length ground
wires
N5444A
2.92 mm, 3.5 mm, SMA
InfiniiMax III+ Series Probes User’s Guide
93
5
Specifications and Characteristics
Environmental
The following general characteristics apply to the active probe.
Table 22 Environmental Characteristics
Environmental Conditions
Operating
Non-Operating
Temperature
5 °C to +40 °C
–40 °C to +70 °C
Humidity
up to 95% relative humidity
(non-condensing) at +40 °C
up to 90% relative humidity at +65 °C
Altitude
Up to 4,600 meters
Up to 15,300 meters
Power Requirements
Voltages supplied by Keysight oscilloscope AutoProbe Interface.
Weight
approximately 0.69 kg
Dimensions
Refer to “Probe Dimensions" on page 96.
Pollution degree 2
Normally only non-conductive pollution occurs. Occasionally, however, a temporary
conductivity caused by condensation must be expected.
Use
Indoor Only
94
InfiniiMax III+ Series Probes User’s Guide
Specifications and Characteristics
5
Safety and Regulatory Information
Table 23
N7010A Safety and Regulatory Information
Description
CAT I
Measurement Category I (CAT I). Measurement category I is for measurements performed on circuits not directly
connected to a mains supply. For example, measurements in circuits not derived from a mains supply and specially
protected (internal) circuits derived from a mains supply. In the latter case, transient stresses are variable. For that
reason, it is required that the transient withstand capability of the equipment is made known to the user.
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. ISM GRP 1-A denotes the instrument is an
Industrial Scientific and Medical Group 1 Class A product. ICES/NMB-001 indicates product compliance with the
Canadian Interference-Causing Equipment Standard.
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. Product Category: With reference
to the equipment types in the WEEE Directive Annex I, this product is classed as a “Monitoring and Control
instrumentation” product. Do not dispose in domestic household. To return unwanted products, contact your local
Keysight office, or refer to www.keysight.com for more information.
InfiniiMax III+ Series Probes User’s Guide
95
5
Specifications and Characteristics
Probe Dimensions
Figure 80 N2830/1/2A Probe Dimensions
Figure 81 N7000/1/2/3A Probe Dimensions
96
InfiniiMax III+ Series Probes User’s Guide
Keysight InfiniiMax III+ Series Probes
User’s Guide
6 Performance Plots
InfiniiMax III+ Probe System Responses 98
N2848A QuickTip Head with N2849A QuickTip 101
N2836A Solder-In Probe Head (Flat Orientation) 102
97
6
Performance Plots
InfiniiMax III+ Probe System Responses
InfiniiMax III+ high-bandwidth active probes for use with Infiniium real-time
oscilloscopes utilize DSP correction filters to enhance the accuracy of
measurements. InfiniiMax III+ probe amplifiers store their unique s parameters in
on board memory for the scope to readout when needed. Probe heads are simple
passive devices and, with careful manufacture, their s-parameters don't vary
significantly so they are stored as nominal s-parameters in the oscilloscope.
When a probe is connected to an oscilloscope channel and the proper probe head
is selected, 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 so many 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 much the same because they are all corrected to same
target system response. The target system response is a flat magnitude, flat phase
response high order low-pass filter that maximizes measurement accuracy.
Figure 82 shows an example of corrected system frequency response of an
N2836A solder-In probe head used with an N2832A 13 GHz InfiniiMax III+ probe
amplifier. Figure 83 on page 99 shows the step response of the corrected system.
Figure 82 Corrected System Frequency Response (N2836A Solder-In Head and N2832A
Amplifier)
98
InfiniiMax III+ Series Probes User’s Guide
Performance Plots
6
Figure 83 Step Response of Corrected System
Since the corrected system response has flat magnitude and phase, the step
response is very flat and has equal pre-shoot and over-shoot. The flat phase will
not distort the phase of the signal under test and therefore provides the truest
reproduction of the signal. The reflection at 1.5 ns (twice the electrical length of
the probe head) is very small indicating that the probe amplifier input termination
is good.
The measure of the quality of a probe system is how well it reproduces the signal
at the probe tip on the oscilloscope screen. Figure 84 on page 100 shows the step
response of the 6.6 GHz BW signal in red, and blue shows how well the probe
system reproduces that step. The BW of the signal being measured is as high as it
can be while limiting the measured rise time error to about 3%.
InfiniiMax III+ Series Probes User’s Guide
99
6
Performance Plots
Figure 84 Fidelity of Step Response (Probe System Versus Input Signal)
This example was for a 13 GHz system (N2832A probe) measuring a 6.6 GHz
signal. This ratio can be used to determine the measurement bandwidth needed
for other bandwidth signals (for a 3% rise time measurement error):
13 GHz × BW signal
BW probe-scope system ≅ ------------------------------------------------6.6 GHz
BW probe-scope system ≅ 1.97 × BW signal
This equation can be used to determine the probe-scope system BW needed to
measure a certain BW signal.
100
InfiniiMax III+ Series Probes User’s Guide
Performance Plots
6
N2848A QuickTip Head with N2849A QuickTip
Figure 85 Input Impedances (Modeled and Measured)
InfiniiMax III+ Series Probes User’s Guide
101
6
Performance Plots
N2836A Solder-In Probe Head (Flat Orientation)
Figure 86 Input Impedances (Modeled and Measured)
102
InfiniiMax III+ Series Probes User’s Guide
Performance Plots
6
Figure 87 Common Mode Rejection Ratio (CMRR) of N2836A Solder-In Probe Head with
N2832A Probe Amplifier
Figure 88 Common Mode Rejection Ratio (CMRR) of N2836A Solder-In Probe Head with
N7003A Probe Amplifier
InfiniiMax III+ Series Probes User’s Guide
103
6
104
Performance Plots
InfiniiMax III+ Series Probes User’s Guide
Keysight InfiniiMax III+ Series Probes
User’s Guide
7 Performance Verification for
N2830A-Series Probes
Bandwidth Performance Verification 106
Touchstone File (1250-1749 & N5443A) 115
Touchstone File (5062-1247 & N5477A) 119
DC Input Resistance Performance Verification 123
Performance Test Record 125
This chapter describes the equipment and procedures needed to verify the
performance of the N2830/1/2A InfiniiMax III+ probes. The performance measured
in this chapter 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.
N OT E
CAUTION
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.
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 insure that cables are discharged before being
connected.
105
7
Performance Verification for N2830A-Series Probes
Bandwidth Performance Verification
This procedure documents the bandwidth performance of the N2832A InfiniiMax
III+ probe amplifier with the N2836A solder-in probe head.
N OT E
The recommended test interval is one year/2000 hours.
Equipment Needed
N OT E
•
InfiniiMax III+ N2836A solder-in probe head.
•
Keysight 2 port E8361A/C Vector Network Analyzer or equivalent VNA that
covers at least a 50 MHz to 13 GHz range. The VNA must have the following
capability:
•
Ability to use a Touchstone file to de-embed at a port.
•
A bias port for port 1 of the VNA. That is it must have an internal bias T’s and
a BNC port that allows bias to be applied to port 1.
This procedure is written assuming the E8361A/C PNA. If a different VNA is used, references
that are specific to the PNA will need to be modified.
•
Keysight N4692A-00F 2.92 mm (female/female) ECal module. Or, other
2.92 mm calibration kit that can calibrate to the 2.92 mm male connectors at
the test ports.
•
Proper test port cables, with adapters as needed, to provide male 2.92 mm
connectors at reference planes. If 2.4 mm or 1.85 mm test port cables are used,
the following Keysight adapters can be used to convert to 2.92 mm male
connectors:
11904A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.4 mm (m) to 2.92 mm (m)
11904D. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.4 mm (f) to 2.92 mm (m)
106
•
Keysight N5443A Performance Verification (PV) Fixture. The N5443A includes
an APC 3.5 (f-f) adapter (1250-1749).
•
Maury Microwave 8775B2 2.92 mm (m) broadband load. Or other 2.92 mm (m)
load with similar or better return loss. A high quality 2.92 mm adapter to a
2.4 mm or 1.85 mm VNA calibration load with required return loss could be
used.
•
Keysight N5477A AutoProbe II to 3.5 mm (f) Adapter. The N5477A comes with
a required NMD 3.5 mm (m) to 3.5 mm (f) adapter (5062-1247).
•
Keysight N5442A AutoProbe I (BNC) to AutoProbe II Adapter.
•
Keysight 1143A Probe Offset Control and Power Module.
•
BNC 50 ohm male terminator. Or equivalent; not a critical part. For example, a
Pomona number 3840-50 or 4119-50.
InfiniiMax III+ Series Probes User’s Guide
7
Performance Verification for N2830A-Series Probes
VNA Setup
Power level: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –6 dBm
Sweep: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Log
Frequency: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 MHz to 34 GHz
Points:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 284 (100 pts/decade)
IF BW: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 kHz
Trace/Smoothing: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 points (3.17%)
1 Connect Test port cables and adapters (if needed) to provide male 2.92 mm
connectors at the measurement planes. Install the BNC 50 ohm terminator to
the E8361A/C VNA’s rear-panel bias input for port 1. This provides a DC 50 ohm
termination for the probe amplifier output.
2 Clear all traces from display, then select S12 to display. Configure the following
settings for S12:
Scale: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 dB/div
Reference Level: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 dB
Reference Position: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 divisions
Procedure
1 Calibrate the PNA to the two male 2.92 mm connectors using the N4692A-00F
ECal module (or equivalent 2.92 mm cal kit).
CAUTION
As with all precision connector interfaces, make sure to torque all connections using
the proper torque wrench!
2 Prepare the N2836A solder-in probe head for connection to the PV fixture as
shown in Figure 89. Shape the leads as shown.
Figure 89 N2836A ZIF Probe Head
3 Connect the APC 3.5 (f-f) adapter, provided with the N5443A PV fixture, to the
N5443A. as shown in Figure 90 on page 108. Use a small bench vise to steady
the N5443A PV fixture on the test surface.
InfiniiMax III+ Series Probes User’s Guide
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7
Performance Verification for N2830A-Series Probes
Figure 90 Test Setup for Measuring Vin of Probe
108
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7
Performance Verification for N2830A-Series Probes
4 Connect the NMD 3.5 mm (m) to 3.5 mm (f) adapter to the N5477A as shown in
the figure. This adapter is provided with the N5477A.
5 Connect the N5477A to the 1143A power supply and turn on the power supply.
6 Set the 1143A’s probe offset control button to “Zero” so no probe offset is
applied.
7 Connect the N2830A-series probe being tested to the N5442A adapter.
Connect the N5442A to the N5477A adapter as shown in the figure.
8 Connect the probe to the N5443A PV fixture:
a
Insert the probe with ZIF probe head into the PV holder far enough that the
tip wires can easily reach the pinches on the PV fixture.
b Form the coax cables so that the tip wires are close to the pincher points
before trying to connect the tip wires. The connectors between the probe
head and the probe amp can be rotated to align the probe tip properly to the
punchers. Since the center trace of the PV fixture is above the ground plane,
the probe head should be tipped slightly so the tip wires touch the center
trace and ground plane at the same time.
c Depress the actuators on the pincher and carefully insert one wire under the
center pincher and the other wire under one of the side pincher. Either
polarity of the probe can be tested and will yield the same results (but
opposite phase) if the probe is working properly. Figure 91 on page 110
shows a close up of the tip wires positioned under the pincher.
d 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.
9 Use the following steps to Install a file to de-embed the adapter (1250-1749)
and the output side of the N5443A. This is the path from the male 2.92 mm
connector to the probe point of the N5443A from Port 1 of the VNA.
a
N OT E
Create the Touchstone file by cutting and pasting the text in “Touchstone
File (1250-1749 & N5443A)" on page 115. Name the file:
Adaptor_1250_1749___OutputSideOfFixture_N5443A.s2p.
You can also copy the data from the Adobe AIR version of Keysight’s Probe Resource Center
(PRC). 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.
b On the VNA, go to menu “Calibration/Fixturing Selections/2 Port
De-embedding” and select Port 1.
c Set S2P file selection to the file saved in step a.
d Check the “Enable De-embedding”.
e Under “Calibration” menu, select “Fixturing ON/off” to turn on
de-embedding.
InfiniiMax III+ Series Probes User’s Guide
109
7
Performance Verification for N2830A-Series Probes
Figure 91 Close-Up of Tip Wires Positioned Under Pincher
10 Trigger the VNA to perform a single sweep. Press “Trigger” under Channel
Setup, and then the green soft-key for “Single”. Display should look like
Figure 92 on page 111. If it looks noticeably different, the probe tip wires may
not be making contact under the pincher.
11 Under “Trace/Math/Memory” select “Data->Memory”. This saves the
de-embedded input voltage trace into the memory.
110
InfiniiMax III+ Series Probes User’s Guide
7
Performance Verification for N2830A-Series Probes
Figure 92 De-Embedded Vin Trace
12 As shown in Figure 93 on page 112, move the Port 1 cable N5477A. Connect
the 8775B2 broadband load as shown in the figure.
13 Use the following steps to Install a file to de-embed the adapter (5062-1247)
and N5477A from port 1 of the VNA.
a
N OT E
Create the Touchstone file by cutting and pasting the text in “Touchstone
File (5062-1247 & N5477A)" on page 119. Name the file
Adapter_5062_1247___Adapter_N5477A.s2p.
You can also copy the data from the Adobe AIR version of Keysight’s Probe Resource Center
(PRC). 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.
b Go to menu “Calibration/Fixturing Selections/2 Port De-embedding” and
select Port 1.
c Set S2P file selection to the file saved in step a.
d Make sure the “Enable De-embedding” box is still checked.
e Under “Calibration” menu, make sure “Fixturing ON/off” is still checked so
file is being used for de-embedding.
InfiniiMax III+ Series Probes User’s Guide
111
7
Performance Verification for N2830A-Series Probes
Figure 93 Test Setup to Measure Vout of Probe
112
InfiniiMax III+ Series Probes User’s Guide
7
Performance Verification for N2830A-Series Probes
14 Trigger VNA to perform a single sweep.
a
Press “Trigger” under Channel Setup, and then the green soft-key for
“Single”.
b 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 –20 dB, but can vary a few tenths of a dB either way.
c Display should look like Figure 94. If it looks noticeably different, the probe
tip wires may not be making contact under the pincher.
15 Under menu “Trace/Math/Memory” select “Data/Memory” in the “Data Math”
box.
a
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”.
b Again, adjust the “Reference Level” in the scale menu so the 50 MHz point is
at center screen. The display should look like Figure 95 on page 114.
c Turn on a marker and adjust it to where the trace crosses 3 dB below the
50 MHz point (which is one division below center screen since screen is set
to 3 dB/div).
d Verify that the BW is ≥ 13 GHz for the N2836A solder-in probe head and
N2832A 13 GHz probe amp combination.
Figure 94 De-Embedded Vout Trace
InfiniiMax III+ Series Probes User’s Guide
113
7
Performance Verification for N2830A-Series Probes
Figure 95 De-Embedded Vout/Vin Response of the Probe
114
InfiniiMax III+ Series Probes User’s Guide
7
Performance Verification for N2830A-Series Probes
Touchstone File (1250-1749 & N5443A)
Cut and paste the following text and save in a text file named
Adapter_1250_1749___OutputSideOfFixture_N5443A.s2p. This file is used in Step 9 on
page 109. This touchstone file is also used in Chapter 8 for the performance
verification of N7000-series probes.
N OT E
You’ll find the following data on the Adobe AIR version of the Probe Resource Center (PRC).
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
51165694.067857 -49.988587 91.181375 -0.025517 -4.280433 -0.024720 -4.324675 -68.880923 -164.662475
52358564.988911 -50.522661 71.165730 -0.024697 -4.382306 -0.023543 -4.427929 -70.190588 -152.193533
53579246.361093 -51.148132 50.755093 -0.023858 -4.486555 -0.022339 -4.533591 -71.710672 -138.296498
54828386.553961 -51.883012 29.852775 -0.023000 -4.593234 -0.021107 -4.641716 -73.455393 -122.229302
56106649.053084 -52.745137 8.328609 -0.022122 -4.702400 -0.019846 -4.752362 -75.383422 -102.800368
57414712.812455 -53.751090 -13.985221 -0.021223 -4.814111 -0.018557 -4.865588 -77.285484 -78.453735
58753272.615119 -54.914477 -37.296089 -0.020304 -4.928426 -0.017237 -4.981454 -78.641246 -48.710849
60123039.442212 -56.136285 -60.059373 -0.019410 -5.044783 -0.015920 -5.098670 -78.505514 -17.996645
61524740.850598 -56.339746 -65.253403 -0.018972 -5.157375 -0.014907 -5.204612 -74.600997 0.238726
62959121.359318 -56.549712 -70.614809 -0.018523 -5.272593 -0.013871 -5.313024 -71.786638 16.619539
64426942.845040 -56.765722 -76.151300 -0.018064 -5.390497 -0.012811 -5.423964 -69.665881 32.555062
65928984.946733 -56.987159 -81.870529 -0.017595 -5.511150 -0.011726 -5.537491 -68.056466 48.587163
67466045.479778 -57.213226 -87.779882 -0.017115 -5.634616 -0.010616 -5.653665 -66.866526 65.023732
69038940.859729 -57.442930 -93.886209 -0.016623 -5.760962 -0.009481 -5.772548 -66.050126 82.119449
70648506.535956 -57.624590 -110.396155 -0.016195 -5.894832 -0.009445 -5.897344 -64.822182 90.200098
72295597.435395 -57.551220 -142.499775 -0.015869 -6.038769 -0.011116 -6.029813 -62.891316 82.809542
73981088.416647 -57.272309 -174.184620 -0.015537 -6.186061 -0.012827 -6.165369 -61.314332 74.543748
75705874.734666 -56.913609 155.103108 -0.015196 -6.336786 -0.014577 -6.304085 -59.987656 65.638030
77470872.516269 -56.615036 125.361237 -0.014847 -6.491025 -0.016368 -6.446035 -58.847549 56.200571
79277019.246748 -56.489319 96.190629 -0.014491 -6.648860 -0.018202 -6.591294 -57.851655 46.281987
81125274.267814 -56.086810 77.082571 -0.015125 -6.803245 -0.019025 -6.749358 -57.369635 49.668006
83016619.287160 -55.464039 64.084902 -0.016432 -6.956544 -0.019176 -6.917300 -57.199270 61.953448
84952058.899892 -54.917900 50.564549 -0.017770 -7.113416 -0.019329 -7.089158 -57.075871 74.341353
86932621.122130 -54.439335 36.470021 -0.019138 -7.273947 -0.019487 -7.265023 -57.007441 86.897368
88959357.937037 -54.018288 21.746324 -0.020539 -7.438220 -0.019648 -7.444988 -57.001200 99.698955
91033345.853589 -54.097863 14.550734 -0.021520 -7.608109 -0.020285 -7.619545 -56.504223 102.747003
93155686.478363 -54.688270 15.600999 -0.022057 -7.783797 -0.021424 -7.788273 -55.536632 95.350174
95327507.100664 -55.335875 16.745463 -0.022606 -7.963581 -0.022589 -7.960934 -54.662417 87.625100
97549961.291281 -56.051127 18.007724 -0.023168 -8.147556 -0.023782 -8.137620 -53.867407 79.587653
99824229.515220 -56.847547 19.421327 -0.023744 -8.335819 -0.025002 -8.318424 -53.140655 71.244030
102151519.758706 -57.028409 32.229328 -0.024811 -8.518103 -0.025270 -8.526257 -53.229937 71.824660
104533068.170813 -57.203696 45.767193 -0.025943 -8.703769 -0.025461 -8.740842 -53.390484 73.175172
106970139.720046 -57.452641 59.100435 -0.027102 -8.893763 -0.025657 -8.960430 -53.558351 74.544470
109464028.866236 -57.799354 72.247228 -0.028288 -9.088187 -0.025857 -9.185138 -53.734081 75.931667
112016060.248099 -58.205431 76.407713 -0.028945 -9.298506 -0.026957 -9.388528 -53.893471 72.124731
114627589.386818 -58.637120 78.159701 -0.029466 -9.516820 -0.028326 -9.589435 -54.061522 66.848820
117300003.406038 -59.105065 79.877381 -0.029999 -9.740223 -0.029727 -9.795026 -54.247548 61.492888
120034721.768639 -59.584054 81.490201 -0.030537 -9.968856 -0.031146 -10.005562 -54.448452 56.117498
122833197.030691 -57.847096 78.713336 -0.030505 -10.204469 -0.031384 -10.233007 -54.242926 55.717121
125696915.612984 -56.373050 75.635986 -0.030472 -10.445575 -0.031627 -10.465755 -54.037670 55.307462
128627398.590544 -55.090007 72.338796 -0.030439 -10.692303 -0.031876 -10.703929 -53.832682 54.888298
131626202.500562 -54.306379 66.932129 -0.030205 -10.948451 -0.031570 -10.953764 -53.494817 54.988088
134694920.169152 -53.880297 59.647516 -0.029793 -11.213741 -0.030773 -11.214700 -53.052945 55.558900
137835181.557386 -53.486272 52.104536 -0.029372 -11.485216 -0.029957 -11.481720 -52.622790 56.157336
141048654.627056 -53.508282 45.730461 -0.030159 -11.752986 -0.030107 -11.751715 -52.284361 56.421252
144337046.226616 -54.420700 42.364200 -0.033536 -12.005802 -0.032342 -12.021139 -52.117964 55.931890
147702102.997784 -55.470568 39.211352 -0.036994 -12.264512 -0.034630 -12.296845 -51.951089 55.430858
151145612.303275 -55.576811 37.842963 -0.039670 -12.539287 -0.036049 -12.583748 -51.944456 54.446241
154669403.176167 -53.732676 40.105390 -0.040639 -12.841065 -0.035607 -12.887130 -52.278075 52.497820
158275347.291397 -52.178102 42.969822 -0.041630 -13.149878 -0.035156 -13.197584 -52.635093 50.550437
161965359.959910 -52.004259 45.986266 -0.041770 -13.470541 -0.034641 -13.513759 -52.766109 50.989381
165741401.145982 -53.013032 48.920340 -0.041128 -13.802856 -0.034066 -13.835944 -52.680124 53.568723
169605476.508267 -54.185614 51.938022 -0.040471 -14.142918 -0.033479 -14.165639 -52.594837 56.183902
173559638.465103 -53.353535 46.144495 -0.039591 -14.466058 -0.034106 -14.495652 -52.681223 53.054380
177605987.284668 -52.395549 39.070167 -0.038666 -14.793912 -0.034887 -14.832523 -52.797494 49.218907
181746672.200541 -52.169589 35.688968 -0.038595 -15.133923 -0.035919 -15.178503 -53.030384 48.315967
185983892.553281 -52.903697 37.808367 -0.039749 -15.488188 -0.037303 -15.534312 -53.432713 51.562899
InfiniiMax III+ Series Probes User’s Guide
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Performance Verification for N2830A-Series Probes
190319898.958608 -53.671016 40.107673 -0.040862 -15.851057 -0.038670 -15.897833 -53.787995 54.424805
194756994.502833 -53.801795 43.465778 -0.041123 -16.226810 -0.039438 -16.262335 -53.156789 52.243875
199297535.966146 -53.943086 46.823120 -0.041390 -16.611323 -0.040225 -16.635334 -52.557852 50.013514
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
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
275185815.981130 -51.754800 32.581293 -0.054937 -22.906560 -0.050202 -22.929332 -52.401581 27.377763
281601465.446084 -52.426237 23.436322 -0.057360 -23.444084 -0.049220 -23.461590 -52.225369 30.372145
288166688.601492 -50.141722 22.093874 -0.057147 -23.964218 -0.048206 -24.027394 -51.161468 31.686174
294884972.590629 -49.853653 30.887087 -0.057999 -24.535771 -0.050035 -24.592002 -51.268626 22.265828
301759885.855612 -49.776989 38.708272 -0.059389 -25.124388 -0.052090 -25.164841 -51.422057 12.143268
308795080.032796 -48.347696 33.823620 -0.061131 -25.692961 -0.051459 -25.752786 -50.227178 13.737775
315994291.892351 -48.485936 29.549305 -0.059722 -26.288759 -0.054400 -26.334640 -49.610356 17.239374
323361345.323065 -48.665429 24.275657 -0.058597 -26.902100 -0.056825 -26.949053 -49.521928 23.486824
330900153.363414 -48.490653 18.844559 -0.058508 -27.532108 -0.057357 -27.600499 -49.949091 29.735275
338614720.279990 -48.115523 23.731233 -0.057500 -28.187494 -0.055355 -28.226210 -50.295079 15.284824
346509143.694381 -47.416900 25.416394 -0.058853 -28.843482 -0.058986 -28.876449 -49.620245 11.560046
354587616.759638 -47.838026 23.437700 -0.061373 -29.502109 -0.060345 -29.544775 -49.384503 7.983506
362854430.387485 -48.753096 20.588112 -0.064328 -30.185369 -0.060547 -30.226722 -49.304935 5.118950
371313975.527454 -48.438196 19.789363 -0.066839 -30.908078 -0.063211 -30.919712 -48.959273 7.111174
379970745.499151 -47.335734 18.341686 -0.067669 -31.598820 -0.062202 -31.629439 -50.947829 8.447970
388829338.378905 -47.288518 18.480970 -0.069668 -32.364173 -0.063655 -32.378360 -49.035406 3.520875
397894459.442048 -47.186291 13.294545 -0.075098 -33.096733 -0.066338 -33.140263 -47.851278 4.310910
407170923.662146 -46.940356 14.281384 -0.073798 -33.866977 -0.066345 -33.855087 -48.397382 2.145757
416663658.268484 -47.171461 14.761701 -0.075883 -34.639733 -0.070645 -34.639129 -48.716178 1.898130
426377705.363190 -46.365553 7.572152 -0.076247 -35.447314 -0.071046 -35.477949 -48.899175 2.468785
436318224.599360 -46.701580 7.151913 -0.076870 -36.265959 -0.071287 -36.319100 -49.620160 -4.118647
446490495.921630 -47.160978 13.689850 -0.075994 -37.111578 -0.072545 -37.175224 -50.397815 -8.680461
456899922.370640 -47.396507 5.107440 -0.077071 -37.989362 -0.073385 -38.033366 -49.671733 -15.929710
467552032.952879 -46.077313 2.865178 -0.082064 -38.861189 -0.075185 -38.898976 -49.133541 -14.551426
478452485.577434 -45.259095 -4.008123 -0.080006 -39.743034 -0.076419 -39.807567 -49.683609 -21.223063
489607070.061218 -45.485801 0.581757 -0.083491 -40.697038 -0.079818 -40.709941 -50.060529 -34.194193
501021711.204246 -46.603526 -10.039365 -0.083755 -41.665129 -0.077315 -41.682717 -48.792928 -16.944997
512702471.936616 -45.029650 -7.000027 -0.081662 -42.639573 -0.084559 -42.668191 -47.488874 -20.655839
524655556.538861 -44.514984 -6.354720 -0.079332 -43.615551 -0.083707 -43.641378 -48.492928 -32.031639
536887313.937376 -44.290770 -6.568840 -0.082138 -44.648013 -0.083945 -44.653837 -48.957638 -36.719941
549404241.076669 -43.504772 -8.685522 -0.083652 -45.691901 -0.084815 -45.691684 -49.515830 -29.325183
562212986.370243 -43.481121 -10.960529 -0.085501 -46.733135 -0.082668 -46.765101 -49.399910 -23.211836
575320353.231926 -43.193036 -11.045160 -0.084422 -47.837255 -0.085212 -47.869091 -48.549704 -24.186062
588733303.689526 -43.579719 -5.409896 -0.088905 -48.969584 -0.085630 -48.973225 -47.693589 -29.030108
602458962.082744 -43.188600 -6.651222 -0.088581 -50.106860 -0.090320 -50.094811 -47.786787 -31.167939
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116
InfiniiMax III+ Series Probes User’s Guide
Performance Verification for N2830A-Series Probes
1148618219.716024
1175396968.615140
1202800034.088982
1230841971.380104
1259537675.070255
1288902386.991699
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7
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InfiniiMax III+ Series Probes User’s Guide
117
7
Performance Verification for N2830A-Series Probes
6932138057.463680 -25.182014 -113.673081 -0.344893 145.199786 -0.343842 145.162774 -26.269667 -142.490968
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16641945259.788942 -19.517598 79.609952 -0.586104 61.195419 -0.579928 61.155659 -19.345649 -133.056375
17029933597.127781 -22.052969 14.417418 -0.567689 28.875945 -0.564626 28.806397 -21.149985 -133.824999
17426967448.531292 -21.630443 -59.992319 -0.583576 -4.158770 -0.574743 -4.255992 -20.911414 -131.946593
17833257700.041199 -19.673154 -120.894595 -0.601843 -37.884863 -0.593646 -37.981253 -19.659181 -138.614133
18249020154.271370 -18.806881 -174.276372 -0.618695 -72.289682 -0.609299 -72.420566 -18.994739 -153.494312
18674475645.032219 -19.178945 134.206183 -0.619021 -107.527664 -0.614326 -107.586015 -19.447309 -168.513987
19109850154.627415 -19.950051 73.371028 -0.618376 -143.565386 -0.611954 -143.651099 -20.065279 179.863710
19555374933.885239 -20.409308 7.727679 -0.619886 179.407608 -0.622828 179.396896 -20.470586 169.575271
20011286624.988346 -19.579681 -58.016432 -0.626351 141.642169 -0.628446 141.549209 -20.272460 158.551078
20477827387.167168 -19.235856 -115.281184 -0.639397 102.910502 -0.637766 102.864098 -20.495114 142.323830
20955245025.323700 -20.044807 -172.267159 -0.636528 63.319590 -0.622112 63.277382 -21.696936 125.790595
21443793121.654022 -21.683487 128.397837 -0.638893 22.760432 -0.630205 22.758924 -22.470371 115.132339
21943731170.339451 -23.474823 60.110496 -0.639381 -18.730062 -0.644866 -18.828618 -22.521536 100.916605
22455324715.377853 -25.165813 -9.497241 -0.659748 -61.201745 -0.649063 -61.248669 -22.485450 79.355738
22978845491.628361 -27.550912 -68.306165 -0.654315 -104.664654 -0.654273 -104.699819 -24.370615 45.962002
23514571569.144375 -38.154103 -108.867665 -0.659796 -149.285435 -0.654825 -149.301469 -32.362011 14.707828
24062787500.871529 -26.705129 3.489938 -0.664487 164.941804 -0.673097 164.975383 -29.551453 127.286232
24623784473.789066 -19.960691 -37.343281 -0.709519 118.324966 -0.711951 118.268423 -20.876395 83.706187
25197860463.574921 -17.075968 -82.581482 -0.762437 70.800631 -0.752851 70.658498 -17.644528 33.508342
25785320392.876629 -16.389933 -129.665074 -0.773976 22.251711 -0.785924 22.378393 -17.091366 -14.641963
26386476293.272152 -17.740325 170.336058 -0.751568 -27.464393 -0.745351 -27.641774 -19.396216 -54.587976
27001647471.006645 -20.441710 86.953452 -0.707798 -78.927817 -0.688728 -78.963080 -22.786124 -65.976014
27631160676.593178 -18.708938 -4.202202 -0.758800 -131.434860 -0.766884 -131.560447 -19.566558 -71.685007
28275350278.367512 -16.258572 -68.478347 -0.826408 175.068642 -0.822329 175.113490 -17.059431 -116.230704
28934558440.089119 -17.148103 -113.353816 -0.822544 120.550907 -0.825989 120.585659 -18.527425 177.493812
29609135302.682766 -19.586442 -134.578145 -0.785243 64.443280 -0.793101 64.316744 -22.070782 76.512077
30299439170.217197 -17.742592 -148.982049 -0.825947 6.809963 -0.812757 6.969945 -18.819692 -28.285789
31005836700.219704 -16.903313 155.292062 -0.824193 -51.457599 -0.858126 -51.738834 -17.800752 -87.794210
31728703098.427670 -18.748424 57.068278 -0.801196 -112.022259 -0.836282 -112.293270 -20.219688 -105.626698
32468422318.080524 -14.659329 -55.335061 -0.919360 -174.054710 -0.905470 -174.339069 -15.122997 -111.544467
33225387263.857967 -11.577429 -135.909942 -1.104865 123.781065 -1.105881 123.849957 -12.199337 -156.048844
34000000000.000000 -13.297830 149.794119 -1.023492 60.693197 -1.035722 60.797201 -13.786461 155.311288
118
InfiniiMax III+ Series Probes User’s Guide
7
Performance Verification for N2830A-Series Probes
Touchstone File (5062-1247 & N5477A)
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 13 on page 111.
This touchstone file is also used in Chapter 8 for the performance verification of
N7000-series probes.
N OT E
You’ll find the following data on the Adobe AIR version of the Probe Resource Center (PRC).
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
51165694.067857 -41.582558 18.207470 -0.015602 -10.384282 -0.028789 -10.293624 -41.089383 73.495272
52358564.988911 -41.622441 18.215746 -0.015982 -10.615782 -0.029040 -10.528422 -41.161865 72.789791
53579246.361093 -41.663443 18.224215 -0.016371 -10.852680 -0.029296 -10.768693 -41.236668 72.067861
54828386.553961 -41.705603 18.232881 -0.016769 -11.095100 -0.029558 -11.014566 -41.313888 71.329101
56106649.053084 -41.748959 18.241750 -0.017177 -11.343172 -0.029827 -11.266171 -41.393626 70.573118
57414712.812455 -41.793551 18.250825 -0.017593 -11.597028 -0.030101 -11.523642 -41.475987 69.799509
58753272.615119 -41.839421 18.260112 -0.018020 -11.856802 -0.030382 -11.787116 -41.561085 69.007865
60123039.442212 -41.886612 18.269615 -0.018457 -12.122633 -0.030670 -12.056732 -41.649039 68.197764
61524740.850598 -41.935170 18.279340 -0.018903 -12.394661 -0.030964 -12.332635 -41.739975 67.368777
62959121.359318 -41.985143 18.289291 -0.019360 -12.673031 -0.031266 -12.614969 -41.834027 66.520463
64426942.845040 -42.036581 18.299475 -0.019828 -12.957891 -0.031574 -12.903886 -41.931338 65.652372
65928984.946733 -42.089534 18.309896 -0.020307 -13.249392 -0.031889 -13.199539 -42.032060 64.764041
67466045.479778 -42.144059 18.320560 -0.020797 -13.547689 -0.032212 -13.502084 -42.136353 63.855001
69038940.859729 -42.200212 18.331472 -0.021298 -13.852941 -0.032543 -13.811683 -42.244390 62.924767
70648506.535956 -42.258052 18.342639 -0.021812 -14.165309 -0.032881 -14.128500 -42.356354 61.972846
72295597.435395 -42.317642 18.354067 -0.022337 -14.484960 -0.033227 -14.452703 -42.472443 60.998732
73981088.416647 -42.379047 18.365760 -0.022874 -14.812063 -0.033581 -14.784464 -42.592867 60.001907
75705874.734666 -42.442337 18.377727 -0.023424 -15.146792 -0.033943 -15.123961 -42.717851 58.981843
77470872.516269 -42.507583 18.389972 -0.023987 -15.489325 -0.034314 -15.471372 -42.847639 57.937997
79277019.246748 -42.574861 18.402503 -0.024563 -15.839843 -0.034693 -15.826882 -42.982492 56.869814
81125274.267814 -42.644252 18.415326 -0.025152 -16.198534 -0.035081 -16.190681 -43.122690 55.776729
83016619.287160 -42.715839 18.428448 -0.025756 -16.565587 -0.035479 -16.562962 -43.268539 54.658159
84952058.899892 -42.789711 18.441876 -0.026373 -16.941198 -0.035885 -16.943922 -43.420368 53.513511
86932621.122130 -42.865962 18.455617 -0.027005 -17.325565 -0.036302 -17.333763 -43.578533 52.342177
88959357.937037 -42.944689 18.469678 -0.027651 -17.718894 -0.036728 -17.732694 -43.743424 51.143535
91033345.853589 -43.025998 18.484067 -0.028313 -18.121392 -0.037163 -18.140925 -43.915463 49.916947
93155686.478363 -43.109997 18.498792 -0.028990 -18.533275 -0.037609 -18.558673 -44.095114 48.661763
95327507.100664 -43.196804 18.513859 -0.029683 -18.954760 -0.038066 -18.986161 -44.282882 47.377316
97549961.291281 -43.286543 18.529278 -0.030393 -19.386071 -0.038533 -19.423615 -44.479324 46.062923
99824229.515220 -43.379343 18.545057 -0.031118 -19.827438 -0.039011 -19.871267 -44.685054 44.717887
102151519.758706 -43.358365 17.974030 -0.031578 -20.282679 -0.039226 -20.325455 -44.681916 43.920698
104533068.170813 -43.327264 17.340603 -0.032024 -20.748832 -0.039422 -20.789906 -44.660665 43.153346
106970139.720046 -43.295554 16.692408 -0.032481 -21.225854 -0.039624 -21.265185 -44.638973 42.368103
109464028.866236 -43.263224 16.029101 -0.032948 -21.713996 -0.039830 -21.751544 -44.616830 41.564553
112016060.248099 -43.230264 15.350329 -0.033426 -22.213520 -0.040040 -22.249242 -44.594230 40.742270
114627589.386818 -43.196665 14.655733 -0.033916 -22.724689 -0.040256 -22.758544 -44.571163 39.900816
117300003.406038 -43.162416 13.944943 -0.034416 -23.247775 -0.040477 -23.279719 -44.547622 39.039744
120034721.768639 -43.127508 13.217582 -0.034929 -23.783057 -0.040703 -23.813045 -44.523598 38.158598
122833197.030691 -43.091931 12.473263 -0.035454 -24.330818 -0.040934 -24.358805 -44.499082 37.256908
125696915.612984 -43.055675 11.711592 -0.035990 -24.891349 -0.041170 -24.917289 -44.474067 36.334197
128627398.590544 -43.018729 10.932162 -0.036540 -25.464949 -0.041413 -25.488793 -44.448542 35.389973
131626202.500562 -42.981085 10.134562 -0.037102 -26.051921 -0.041660 -26.073621 -44.422500 34.423737
134694920.169152 -42.942730 9.318366 -0.037677 -26.652579 -0.041914 -26.672084 -44.395931 33.434973
137835181.557386 -42.903656 8.483141 -0.038266 -27.267239 -0.042173 -27.284499 -44.368827 32.423157
141048654.627056 -42.863852 7.628444 -0.038869 -27.896230 -0.042439 -27.911192 -44.341178 31.387752
144337046.226616 -42.823309 6.753821 -0.039486 -28.539885 -0.042711 -28.552495 -44.312975 30.328208
147702102.997784 -42.782014 5.858807 -0.040117 -29.198546 -0.042989 -29.208750 -44.284210 29.243962
151145612.303275 -42.761443 4.946541 -0.040680 -29.873082 -0.043283 -29.881319 -44.250154 28.088307
154669403.176167 -42.784598 4.020426 -0.041087 -30.564410 -0.043606 -30.571648 -44.205805 26.811021
158275347.291397 -42.808357 3.072719 -0.041503 -31.271854 -0.043936 -31.278072 -44.160655 25.503957
161965359.959910 -42.832738 2.102918 -0.041930 -31.995792 -0.044274 -32.000965 -44.114694 24.166420
165741401.145982 -42.857758 1.110506 -0.042366 -32.736608 -0.044619 -32.740712 -44.067912 22.797700
169605476.508267 -42.883436 0.094958 -0.042812 -33.494695 -0.044973 -33.497705 -44.020299 21.397070
173559638.465103 -42.909791 -0.944266 -0.043269 -34.270456 -0.045335 -34.272347 -43.971845 19.963785
177605987.284668 -42.936844 -2.007719 -0.043736 -35.064303 -0.045706 -35.065048 -43.922539 18.497086
181746672.200541 -42.964615 -3.095965 -0.044215 -35.876657 -0.046085 -35.876231 -43.872372 16.996191
185983892.553281 -42.993126 -4.209583 -0.044704 -36.707951 -0.046473 -36.706325 -43.821333 15.460305
InfiniiMax III+ Series Probes User’s Guide
119
7
Performance Verification for N2830A-Series Probes
190319898.958608 -43.022399 -5.349163 -0.045205 -37.558626 -0.046870 -37.555772 -43.769413 13.888612
194756994.502833 -43.052457 -6.515311 -0.045718 -38.429133 -0.047276 -38.425023 -43.716602 12.280276
199297535.966146 -43.083324 -7.708646 -0.046242 -39.319934 -0.047692 -39.314540 -43.662891 10.634444
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
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
275185815.981130 -43.711104 -21.130952 -0.053271 -54.209438 -0.050621 -54.158244 -43.242012 -10.262192
281601465.446084 -43.823773 -22.308872 -0.054404 -55.468127 -0.050995 -55.416485 -43.206570 -11.648931
288166688.601492 -43.940602 -23.514255 -0.055563 -56.756161 -0.051379 -56.704061 -43.170452 -13.068000
294884972.590629 -44.061804 -24.747740 -0.056750 -58.074224 -0.051771 -58.021656 -43.133646 -14.520153
301759885.855612 -44.185888 -26.135617 -0.057555 -59.421903 -0.052216 -59.369819 -43.118534 -16.493975
308795080.032796 -44.309538 -27.929515 -0.057159 -60.797690 -0.052799 -60.748967 -43.169916 -19.964677
315994291.892351 -44.437919 -29.765235 -0.056755 -62.205552 -0.053395 -62.160270 -43.222813 -23.516294
323361345.323065 -44.571288 -31.643752 -0.056341 -63.646238 -0.054006 -63.604475 -43.277279 -27.150714
330900153.363414 -44.709920 -33.566066 -0.055917 -65.120511 -0.054631 -65.082350 -43.333371 -30.869866
338614720.279990 -44.854113 -35.533196 -0.055484 -66.629155 -0.055271 -66.594680 -43.391147 -34.675726
346509143.694381 -45.004188 -37.546187 -0.055040 -68.172971 -0.055925 -68.142268 -43.450671 -38.570315
354587616.759638 -45.081293 -39.640674 -0.055604 -69.757085 -0.056555 -69.729596 -43.443565 -41.682121
362854430.387485 -45.099174 -41.810905 -0.056974 -71.381482 -0.057168 -71.356781 -43.383418 -44.186244
371313975.527454 -45.117511 -44.031733 -0.058376 -73.043750 -0.057795 -73.021901 -43.322297 -46.748747
379970745.499151 -45.136315 -46.304337 -0.059811 -74.744773 -0.058437 -74.725842 -43.260193 -49.370992
388829338.378905 -45.155600 -48.629924 -0.061279 -76.485452 -0.059094 -76.469508 -43.197098 -52.054371
397894459.442048 -45.175378 -51.009730 -0.062782 -78.266714 -0.059766 -78.253826 -43.133002 -54.800311
407170923.662146 -45.439394 -54.125157 -0.063410 -80.086549 -0.060112 -80.070659 -43.191536 -58.298819
416663658.268484 -45.795170 -57.517576 -0.063779 -81.947923 -0.060362 -81.927120 -43.289602 -62.085778
426377705.363190 -46.174984 -60.989085 -0.064156 -83.852693 -0.060617 -83.826862 -43.391114 -65.961025
436318224.599360 -46.581649 -64.541529 -0.064543 -85.801871 -0.060879 -85.770895 -43.496235 -69.926620
446490495.921630 -47.018494 -68.176794 -0.064938 -87.796491 -0.061147 -87.760251 -43.605141 -73.984668
456899922.370640 -47.449942 -71.123890 -0.065692 -89.836182 -0.062537 -89.798743 -43.791267 -78.341637
467552032.952879 -47.893175 -73.737398 -0.066647 -91.922680 -0.064540 -91.886196 -44.025196 -82.906526
478452485.577434 -48.371442 -76.411838 -0.067623 -94.057823 -0.066590 -94.022315 -44.271284 -87.577840
489607070.061218 -48.889746 -79.148628 -0.068623 -96.242744 -0.068688 -96.208235 -44.530542 -92.358060
501021711.204246 -49.429340 -82.184197 -0.069634 -98.479232 -0.070689 -98.445619 -44.777030 -97.275465
512702471.936616 -49.746024 -87.736429 -0.070542 -100.774396 -0.071209 -100.740382 -44.751497 -102.575433
524655556.538861 -50.082506 -93.418105 -0.071471 -103.123069 -0.071741 -103.088645 -44.725448 -107.998964
536887313.937376 -50.440881 -99.232242 -0.072422 -105.526499 -0.072285 -105.491656 -44.698871 -113.548938
549404241.076669 -50.823590 -105.181930 -0.073396 -107.985962 -0.072842 -107.950690 -44.671759 -119.228304
562212986.370243 -51.236245 -112.987719 -0.074730 -110.493168 -0.073954 -110.456120 -44.576441 -125.891185
575320353.231926 -51.679994 -121.061220 -0.076112 -113.058347 -0.075118 -113.019415 -44.476646 -132.751889
588733303.689526 -52.158849 -129.322945 -0.077527 -115.683331 -0.076310 -115.642471 -44.375697 -139.772542
602458962.082744 -52.577492 -139.013843 -0.078956 -118.369379 -0.077508 -118.328006 -44.288649 -147.115596
616504618.847291 -52.548698 -154.728547 -0.080325 -121.117420 -0.078632 -121.082361 -44.270677 -155.374044
630877734.387229 -52.519331 -170.809623 -0.081727 -123.929528 -0.079783 -123.900931 -44.252324 -163.825029
645585943.037598 -52.489382 172.734390 -0.083162 -126.807198 -0.080961 -126.785213 -44.233584 -172.473039
660637057.119418 -51.781446 161.510155 -0.083923 -129.753281 -0.081531 -129.727470 -44.043176 179.347615
676039071.089234 -50.859704 152.408790 -0.084403 -132.768611 -0.081843 -132.734386 -43.782386 171.262207
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120
InfiniiMax III+ Series Probes User’s Guide
Performance Verification for N2830A-Series Probes
1148618219.716024
1175396968.615140
1202800034.088982
1230841971.380104
1259537675.070255
1288902386.991699
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7
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InfiniiMax III+ Series Probes User’s Guide
121
7
Performance Verification for N2830A-Series Probes
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19555374933.885239 -24.586218 -144.108105 -0.414361 128.893776 -0.407288 129.005005 -22.618008 -141.317301
20011286624.988346 -26.045948 105.213101 -0.402389 39.501393 -0.389836 39.614344 -25.938526 122.482384
20477827387.167168 -25.898538 12.536934 -0.388736 -52.130474 -0.375999 -52.034114 -30.307011 51.901194
20955245025.323700 -25.863619 -61.341207 -0.403561 -145.804189 -0.393551 -145.786077 -26.672025 -32.965204
21443793121.654022 -31.243910 -92.221920 -0.402312 118.118322 -0.396327 118.261313 -31.028754 -177.176860
21943731170.339451 -23.158869 -142.365828 -0.443013 19.867220 -0.432500 19.917340 -22.801909 8.354422
22455324715.377853 -20.480757 91.146321 -0.465176 -80.436626 -0.462656 -80.272536 -20.450127 -78.156390
22978845491.628361 -23.350751 -42.524375 -0.439231 176.888332 -0.437659 176.972824 -24.720232 -132.556294
23514571569.144375 -29.096385 25.034429 -0.434284 71.509130 -0.415904 71.569311 -29.744440 -88.823584
24062787500.871529 -20.867025 -106.511416 -0.473044 -36.135123 -0.451251 -36.183006 -20.573606 -144.546395
24623784473.789066 -26.684148 130.707972 -0.463478 -146.321169 -0.428301 -146.096394 -24.004558 127.818009
25197860463.574921 -31.160196 61.734789 -0.446323 100.735661 -0.410981 100.913010 -39.408221 -29.991332
25785320392.876629 -25.533397 -17.272853 -0.440480 -14.729362 -0.438068 -14.647444 -26.709420 161.061882
26386476293.272152 -22.711245 -101.871135 -0.471170 -133.063592 -0.457863 -133.066616 -23.104139 19.695494
27001647471.006645 -27.253283 112.297230 -0.461232 106.068363 -0.457380 106.198584 -26.510214 -77.900230
27631160676.593178 -30.361881 -168.178401 -0.455009 -17.907822 -0.473248 -17.742401 -33.304329 -45.653780
28275350278.367512 -17.914343 -10.269666 -0.535415 -144.847239 -0.495666 -144.767531 -18.500405 -94.926037
28934558440.089119 -25.403265 -145.855952 -0.458652 85.819950 -0.471521 86.027882 -25.033409 132.887622
29609135302.682766 -21.411602 -123.245956 -0.500273 -47.265432 -0.509761 -47.235075 -21.254847 -153.392821
30299439170.217197 -27.014691 72.673095 -0.489298 176.678655 -0.474972 177.031191 -25.338474 101.072054
31005836700.219704 -26.316760 -92.472631 -0.452905 37.601195 -0.500821 37.724078 -24.884493 -3.740226
31728703098.427670 -24.576379 -122.274522 -0.482050 -105.277061 -0.496607 -105.184253 -22.985629 83.341478
32468422318.080524 -18.473439 97.257414 -0.522336 109.131590 -0.552294 109.178004 -17.832689 -62.528240
33225387263.857967 -35.956091 36.668777 -0.453368 -40.549604 -0.433040 -40.351388 -38.607656 -59.673550
34000000000.000000 -18.584633 -83.525655 -0.518071 166.056015 -0.538472 166.289380 -18.908405 -121.618048
122
InfiniiMax III+ Series Probes User’s Guide
7
Performance Verification for N2830A-Series Probes
DC Input Resistance Performance Verification
N OT E
The recommended test interval is one year/2000 hours.
Equipment Needed
•
N OT E
InfiniiMax III+ N2836A solder-in probe head. An N5441A solder-in probe head
may be substituted.
You only need to perform the performance verification test on one of these probe heads, not
both of them. If it passes for one of them, then it will pass for all of them.
•
Keysight N5443A Performance Verification Fixture. No substitute.
•
BNC(m) to SMA(m) Adapter. Pomona 4288 or equivalent.
•
Banana Plug to BNC(f). Pomona 1269 or equivalent.
•
Digital Multimeter:
•
Keysight 33401A or equivalent
•
Critical specification: 2 wire resistance accuracy
•
Power Supply for Probe
•
DSO/DSA 90000 X-series oscilloscope or 1134A power supply with N5477A
Autoprobe adapter (see the “Bandwidth Performance Verification" on
page 106 procedure)
•
No substitute
•
Probe Positioner
•
Keysight N2787A 3D Probe Positioner
•
Critical specification: stable/accurate positioning
•
Small Bench Vise
Measuring Input Resistance of N2836A Probe Head
Figure 96 shows the correct setup for measuring the differential input resistance
for the solder-in probe head.
1 Connect the BNC to SMA adapter and BNC to Banana Plug adapters as shown
in Figure 96 on page 124.
2 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.
InfiniiMax III+ Series Probes User’s Guide
123
7
Performance Verification for N2830A-Series Probes
Figure 96 Measuring the Differential Input Resistance of Solder-In Probe Head
3 Connect the probe amplifier to the oscilloscope or power supply so it is
powered.
4 Connect the ZIF or solder-in probe head to the probe amp and insert it into the
PV fixture as shown Figure 96.
5 Depress the pincher fingers on the PV fixture so they open and carefully insert
the tip wires under the pincher. Release the pincher once the tips are inserted.
6 As shown in Figure 96, measure the DC input resistance between the banana
plugs. Since one tip wire is connected to the signal line and the other tip is
connected to the PV fixture ground, this is a measurement of the differential
input resistance. It should be 100 kW ±2% (98 to 102 kW).
7 To measure the single-ended input resistance, measure the resistance between
the signal plug of the banana adapter and the probe amplifier ground, which
can be accessed as shown in Figure 97 (through the vent window of the probe
amplifier).
Figure 97 Measuring the Single-Ended Input Resistance the Solder-In Probe Head
124
InfiniiMax III+ Series Probes User’s Guide
Performance Verification for N2830A-Series Probes
7
Performance Test Record
N OT E
The recommended test interval is one year/2000 hours.
Table 24 Test Information
Keysight Technologies
Keysight InfiniiMax III+ Series Probe
Model Number:
Tested by:
Serial Number:
Work Order Number:
Recommended next test date:
Date:
Table 25 Test Results
Test with Probe Heads
(only required to test one)
Test Limits
Result
Pass/Fail
Bandwidth Performance Test
N2836A
≥ 13 GHz
DC Input Resistance Performance Test
N2836A
98 to 102 kW (differential mode)
49 to 51 kW (single-ended mode)
N5441A
98 to 102 kW (differential mode)
49 to 51 kW (single-ended mode)
InfiniiMax III+ Series Probes User’s Guide
125
7
126
Performance Verification for N2830A-Series Probes
InfiniiMax III+ Series Probes User’s Guide
Keysight InfiniiMax III+ Series Probes
User’s Guide
8 Performance Verification for
N7000-Series Probes
Bandwidth Performance Verification 128
DC Input Resistance Performance Verification 137
Performance Test Record 139
This chapter describes the equipment and procedures needed to verify the
performance of N7000/1/2/3A InfiniiMax III+ probes. The performance measured
in this chapter 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.
N OT E
CAUTION
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.
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 insure that cables are discharged before being
connected.
127
8
Performance Verification for N7000-Series Probes
Bandwidth Performance Verification
This procedure documents the bandwidth performance of the N7003A InfiniiMax
III+ probe amplifier with the N2836A solder-in probe head.
N OT E
The recommended test interval is one year/2000 hours.
Equipment Needed
N OT E
•
InfiniiMax III+ N2836A solder-in probe head.
•
Keysight 2 port E8361A/C Vector Network Analyzer or equivalent VNA that
covers at least a 50 MHz to 20 GHz range. The VNA must have the following
capability:
•
Ability to use a Touchstone file to de-embed at a port.
•
A bias port for port 1 of the VNA. That is it must have an internal bias T’s and
a BNC port that allows bias to be applied to port 1.
This procedure is written assuming the E8361A/C PNA. If a different VNA is used, references
that are specific to the PNA will need to be modified.
•
Keysight N4692A-00F 2.92 mm (female/female) ECal module. Or, other
2.92 mm calibration kit that can calibrate to the 2.92 mm male connectors at
the test ports.
•
Proper test port cables, with adapters as needed, to provide male 2.92 mm
connectors at reference planes. If 2.4 mm or 1.85 mm test port cables are used,
the following Keysight adapters can be used to convert to 2.92 mm male
connectors:
11904A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.4 mm (m) to 2.92 mm (m)
11904D. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.4 mm (f) to 2.92 mm (m)
128
•
Keysight N5443A Performance Verification (PV) Fixture. The N5443A includes
an APC 3.5 (f-f) adapter (1250-1749).
•
Maury Microwave 8775B2 2.92 mm male broadband load. Or other 2.92 mm
male load with similar or better return loss. A high quality 2.92 mm adapter to a
2.4 mm or 1.85 mm VNA calibration load with required return loss could be
used.
•
Keysight N5477A AutoProbe II to 3.5 mm (f) Adapter. The N5477A comes with
a required NMD 3.5 mm (m) to 3.5 mm (f) adapter (5062-1247).
•
Keysight 1143A Probe Offset Control and Power Module.
•
BNC 50 ohm male terminator. Or equivalent; not a critical part. For example, a
Pomona number 3840-50 or 4119-50.
InfiniiMax III+ Series Probes User’s Guide
8
Performance Verification for N7000-Series Probes
VNA Setup
Power level: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –6 dBm
Sweep: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Log
Frequency: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 MHz to 34 GHz
Points:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 284 (100 pts/decade)
IF BW: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 kHz
Trace/Smoothing: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 points (3.17%)
1 Connect Test port cables and adapters (if needed) to provide male 2.92 mm
connectors at the measurement planes. Install the BNC 50 ohm terminator to
the E8361A/C VNA’s rear-panel bias input for port 1. This provides a DC 50 ohm
termination for the probe amplifier output.
2 Clear all traces from display, then select S12 to display. Configure the following
settings for S12:
Scale: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 dB/div
Reference Level: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 dB
Reference Position: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 divisions
Procedure
1 Calibrate the PNA to the two male 2.92 mm connectors using the N4692A-00F
ECal module (or equivalent 2.92 mm cal kit).
CAUTION
As with all precision connector interfaces, make sure to torque all connections using
the proper torque wrench!
2 Prepare the N2836A solder-in probe head for connection to the PV fixture as
shown in Figure 98. Shape the leads as shown with the resistors angled until
they almost touch.
Figure 98 N2836A ZIF Probe Head
InfiniiMax III+ Series Probes User’s Guide
129
8
Performance Verification for N7000-Series Probes
3 Connect the APC 3.5 (f-f) adapter, provided with the N5443A PV fixture, to the
N5443A. as shown in Figure 99. Use a small bench vise to steady the N5443A
PV fixture on the test surface.
Figure 99 Test Setup for Measuring Vin of Probe
130
InfiniiMax III+ Series Probes User’s Guide
8
Performance Verification for N7000-Series Probes
4 Connect the NMD 3.5 mm (m) to 3.5 mm (f) adapter to the N5477A as shown in
the figure. This adapter is provided with the N5477A.
5 Connect the N5477A to the 1143A power supply and turn on the power supply.
6 Set the 1143A’s probe offset control button to “Zero” so no probe offset is
applied.
7 Connect the N7000A-series probe being tested to the N5477A adapter as
shown in the figure.
8 Connect the probe to the N5443A PV fixture:
a
Insert the probe with ZIF probe head into the PV holder far enough that the
tip wires can easily reach the pinches on the PV fixture.
b Form the coax cables so that the tip wires are close to the pincher points
before trying to connect the tip wires. The connectors between the probe
head and the probe amp can be rotated to align the probe tip properly to the
punchers. Since the center trace of the PV fixture is above the ground plane,
the probe head should be tipped slightly so the tip wires touch the center
trace and ground plane at the same time.
c Depress the actuators on the pincher and carefully insert one wire under the
center pincher and the other wire under one of the side pincher. Either
polarity of the probe can be tested and will yield the same results (but
opposite phase) if the probe is working properly. Figure 100 on page 132
shows a close up of the tip wires positioned under the pincher.
d 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.
9 Use the following steps to Install a file to de-embed the adapter (1250-1749)
and the output side of the N5443A. This is the path from the male 2.92 mm
connector to the probe point of the N5443A from Port 1 of the VNA.
a
N OT E
Create a Touchstone file by cutting and pasting the text in “Touchstone File
(1250-1749 & N5443A)" on page 115. Name the file:
Adaptor_1250_1749___OutputSideOfFixture_N5443A.s2p. This is the same file
that is used in Chapter 7 for the performance verification of N2830A-series
probes.
You can also copy the data from the Adobe AIR version of Keysight’s Probe Resource Center
(PRC). 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.
InfiniiMax III+ Series Probes User’s Guide
131
8
Performance Verification for N7000-Series Probes
b On the VNA, go to menu “Calibration/Fixturing Selections/2 Port
De-embedding” and select Port 1.
c Set S2P file selection to the file saved in step a.
d Check the “Enable De-embedding”.
e Under “Calibration” menu, select “Fixturing ON/off” to turn on
de-embedding.
Figure 100 Close-Up of Tip Wires Positioned Under Pincher
10 Trigger the VNA to perform a single sweep. Press “Trigger” under Channel
Setup, and then the green soft-key for “Single”. Display should look like
Figure 101 on page 133. If it looks noticeably different, the probe tip wires may
not be making contact under the pincher.
11 Under “Trace/Math/Memory” select “Data->Memory”. This will save the
de-embedded input voltage trace into the memory.
132
InfiniiMax III+ Series Probes User’s Guide
8
Performance Verification for N7000-Series Probes
Figure 101 De-Embedded Vin Trace
12 As shown in Figure 102 on page 134, move the Port 1 cable the N5477A.
Connect the 8775B2 broadband load as shown in the figure.
13 Use the following steps to Install a file to de-embed the adapter (5062-1247)
and N5477A from port 1 of the VNA.
a
N OT E
Create the Touchstone file by cutting and pasting the text in “Touchstone
File (5062-1247 & N5477A)" on page 119. Name the file
Adapter_5062_1247___Adapter_N5477A.s2p. This is the same file that is used in
Chapter 7 for the performance verification of N2830A-series probes.
You can also copy the data from the Adobe AIR version of Keysight’s Probe Resource Center
(PRC). 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.
b Go to menu “Calibration/Fixturing Selections/2 Port De-embedding” and
select Port 1.
c Set S2P file selection to the file saved in step a.
d Make sure the “Enable De-embedding” box is still checked.
e Under “Calibration” menu, make sure “Fixturing ON/off” is still checked so
file is being used for de-embedding.
InfiniiMax III+ Series Probes User’s Guide
133
8
Performance Verification for N7000-Series Probes
Figure 102 Test Setup to Measure Vout of Probe
134
InfiniiMax III+ Series Probes User’s Guide
8
Performance Verification for N7000-Series Probes
14 Trigger VNA to perform a single sweep.
a
Press “Trigger” under Channel Setup, and then the green soft-key for
“Single”.
b 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 –20 dB, but can vary a few tenths of a dB either way.
c Display should look like Figure 103 on page 135. If it looks noticeably
different, the probe tip wires may not be making contact under the pincher.
15 Under menu “Trace/Math/Memory” select “Data/Memory” in the “Data Math”
box.
a
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”.
b Again, adjust the “Reference Level” in the scale menu so the 50 MHz point is
at center screen. The display should look like Figure 104 on page 136.
c Turn on a marker and adjust it to where the trace crosses 3 dB below the
50 MHz point (which is one division below center screen since screen is set
to 3 dB/div).
d Verify that the BW is ≥ 20 GHz for the N2836A solder-in probe head and
N7003A 20 GHz probe amp combination.
Figure 103 De-Embedded Vout Trace
InfiniiMax III+ Series Probes User’s Guide
135
8
Performance Verification for N7000-Series Probes
Figure 104 De-Embedded Vout/Vin Response of the Probe
136
InfiniiMax III+ Series Probes User’s Guide
8
Performance Verification for N7000-Series Probes
DC Input Resistance Performance Verification
N OT E
The recommended test interval is one year/2000 hours.
Equipment Needed
•
N OT E
InfiniiMax III+ N2836A solder-in probe head. An N5441A solder-in probe head
may be substituted.
You only need to perform the performance verification test on one of these probe heads, not
both of them. If it passes for one of them, then it will pass for all of them.
•
Keysight N5443A Performance Verification Fixture. No substitute.
•
BNC(m) to SMA(m) Adapter. Pomona 4288 or equivalent.
•
Banana Plug to BNC(f). Pomona 1269 or equivalent.
•
Digital Multimeter:
•
Keysight 33401A or equivalent
•
Critical specification: 2 wire resistance accuracy
•
Power Supply for Probe
•
DSO/DSA 90000 X-series oscilloscope or 1134A power supply with N5477A
Autoprobe adapter (see the “Bandwidth Performance Verification" on
page 128 procedure)
•
No substitute
•
Probe Positioner
•
Keysight N2787A 3D Probe Positioner
•
Critical specification: stable/accurate positioning
•
Small Bench Vise
Measuring Input Resistance of N2836A Probe Head
Figure 105 shows the correct setup for measuring the differential input resistance
for the solder-in probe head.
1 Connect the BNC to SMA adapter and BNC to Banana Plug adapters as shown
in Figure 105 on page 138.
2 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.
InfiniiMax III+ Series Probes User’s Guide
137
8
Performance Verification for N7000-Series Probes
Figure 105 Measuring the Differential Input Resistance of Solder-In Probe Head
3 Connect the probe amplifier to the oscilloscope or power supply so it is
powered.
4 Connect the ZIF or solder-in probe head to the probe amp and insert it into the
PV fixture as shown Figure 105.
5 Depress the pincher fingers on the PV fixture so they open and carefully insert
the tip wires under the pincher. Release the pincher once the tips are inserted.
6 As shown in Figure 105, measure the DC input resistance between the banana
plugs. Since one tip wire is connected to the signal line and the other tip is
connected to the PV fixture ground, this is a measurement of the differential
input resistance. It should be 100 kW ±2% (98 to 102 kW).
7 To measure the single-ended input resistance, measure the resistance between
the signal plug of the banana adapter and the probe amplifier ground, which
can be accessed as shown in Figure 106 (through the vent window of the probe
amplifier).
Figure 106 Measuring the Single-Ended Input Resistance the Solder-In Probe Head
138
InfiniiMax III+ Series Probes User’s Guide
Performance Verification for N7000-Series Probes
8
Performance Test Record
N OT E
The recommended test interval is one year/2000 hours.
Table 26 Test Information
Keysight Technologies
Keysight InfiniiMax III+ Series Probe
Model Number:
Tested by:
Serial Number:
Work Order Number:
Recommended next test date:
Date:
Table 27 Test Results
Test with Probe Heads
(only required to test one)
Test Limits
Result
Pass/Fail
Bandwidth Performance Test
N2836A
≥ 20 GHz
DC Input Resistance Performance Test
N2836A
98 to 102 kW (differential mode)
49 to 51 kW (single-ended mode)
N5441A
98 to 102 kW (differential mode)
49 to 51 kW (single-ended mode)
InfiniiMax III+ Series Probes User’s Guide
139
8
140
Performance Verification for N7000-Series Probes
InfiniiMax III+ Series Probes User’s Guide
Keysight InfiniiMax III+ Series Probes
User’s Guide
9 SPICE Models
N2848A QuickTip Head with N2849A QuickTip Tip 142
N5439A ZIF Probe Head with N5440A ZIF Tip 143
N5439A ZIF Probe Head with N2838A ZIF Tip 144
N2836A 26 GHz Solder-In Probe Heads 145
N5441A 16 GHz Solder-In Probe Head 146
N5445A Browser Probe Head 147
N5444A SMA Probe Head 149
The SPICE models in this chapter are for the input impedances of the various Infiniimax III+
probes heads. The input impedance is only a function of the probe head, as the amplifier
input does not significantly affect the input impedance.
Chapter 6, “Performance Plots shows the matching between the measured input
impedance and these modeled input impedances for the various probe heads.
141
9
SPICE Models
N2848A QuickTip Head with N2849A QuickTip Tip
The following input-impedance SPICE subcircuit data is for the N2848A QuickTip probe
head with N2849A QuickTip tip. The data models all modes of input impedance:
differential, common, and A or B. The probe is vertical orientated with both ground wires
connected to the DUT ground.
SPICE Subcircuit Data
.subckt N2849A_N2848A 1 2
r1 1 3 1e8
r2 2 3 1e8
r9 3 0 .5e8
r_srlc2 5 7 242.9
l_srlc2 7 8 5.370n
c_srlc2 8 6 52.43f
r_srlc3 4 9 68.66
l_srlc3 9 10 7.669n
c_srlc3 10 6 7.102f
r_srlc1 4 11 245.5
l_srlc1 11 12 1.550n
c_srlc1 12 6 197.9f
r3 4 13 1000
c1 13 6 50n
r5 13 6 100k
r8 6 0 1e-6
r4 14 16 500
r_srlc4 14 18 353.9
l_srlc4 18 19 10.98n
c_srlc4 19 17 230.6f
r_srlc5 14 20 110.7
l_srlc5 20 21 5.880n
c_srlc5 21 17 8.244f
r_srlc6 15 22 611.8
l_srlc6 22 23 8.632n
c_srlc6 23 17 49.18f
r6 16 17 50k
c2 16 17 100n
r7 17 0 1e-6
e1 5 0 4 0 -1
e2 4 0 1 2 1
e3 14 0 3 0 2
e4 15 0 14 0 -1
g1 1 2 6 0 1e6
g2 1 0 17 0 1e6
g3 2 0 17 0 1e6
.ends
142
InfiniiMax III+ Series Probes User’s Guide
SPICE Models
9
N5439A ZIF Probe Head with N5440A ZIF Tip
The following SPICE subcircuit data is for the N5440A 28 GHz ceramic ZIF Tips on an
N5439A ZIF probe head.
SPICE Subcircuit Data
.subckt N5440A_N5439A_450ohmZIF 1 2
c1 1 10 20f
l1 10 11 1.5n
r1 11 2 180
rp1 1 3 180
lp1 3 4 1.5n
cp1 4 5 24f
cp2 5 6 100n
rp2 6 1 500
rp3 5 1 50k
cm1 2 7 24f
lm1 7 8 1.5n
rm1 8 5 180
cm2 2 9 100n
rm2 9 5 500
rm3 2 5 50k
rom 5 0 180
lom 5 0 30u
.ends
InfiniiMax III+ Series Probes User’s Guide
143
9
SPICE Models
N5439A ZIF Probe Head with N2838A ZIF Tip
The following SPICE subcircuit data is for the N2838A 25 GHz printed-circuit board ZIF Tip
on an N5439A ZIF probe head.
SPICE Subcircuit Data
.subckt N2838A_N5439A_PcbZif 1 2
Cblkp 6 13 100n
Cblkn 2 14 100n
Cg1p 1 4 26.1f
Cg1n 5 6 26.1f
Cg2p 1 10 128.4f
Cg2n 12 6 128.4f
Cm2 2 8 3.04f
Cm3 2 3 7.05f
Rg1p 4 6 67.8
Rg1n 2 5 67.8
Rg2p 9 6 126.2
Rg2n 2 11 126.2
Rm2 1 7 225.9
Rm3 1 15 71.5
Rmbp 1 13 500
Rmbn 14 6 500
Rdcp 1 6 50k
Rdcn 2 6 50k
Rom 6 0 110
Lom 6 0 30u
Lg2p 9 10 1.21n
Lg2n 11 12 1.21n
Lm2 7 8 15.3n
Lm3 3 15 5.76n
.ends
144
InfiniiMax III+ Series Probes User’s Guide
SPICE Models
9
N2836A 26 GHz Solder-In Probe Heads
SPICE Subcircuit Data
.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
Cm2 2 8 4.12f
Cm3 2 3 6.46f
Rg1p 4 6 52.4
Rg1n 2 5 52.4
Rg2p 9 6 142
Rg2n 2 11 142
Rm2 1 7 172.4
Rm3 1 15 67.9
Rmbp 1 13 500
Rmbn 14 6 500
Rdcp 1 6 50k
Rdcn 2 6 50k
Rom 6 0 110
Lom 6 0 30u
Lg2p 9 10 1.12n
Lg2n 11 12 1.12n
Lm2 7 8 11.2n
Lm3 3 15 5.90n
.ends
InfiniiMax III+ Series Probes User’s Guide
145
9
SPICE Models
N5441A 16 GHz Solder-In Probe Head
SPICE Subcircuit Data
.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
cp2 5 6 100n
rp2 6 1 500
rp3 5 1 50k
cm1 2 7 55f
lm1 7 8 2.5n
rm1 8 5 65
cm2 2 9 100n
rm2 9 5 500
rm3 2 5 50k
rom 5 0 130
lom 5 0 30u
.ends
146
InfiniiMax III+ Series Probes User’s Guide
SPICE Models
9
N5445A Browser Probe Head
This section includes N5445A SPICE models for the probe tips adjusted to a 1 mm, 2 mm,
and 3 mm span.
SPICE Subcircuit Data (1 mm span)
.subckt N5445A_Brwsr1mmSpn 1 2
c1 1 10 20f
l1 10 11 2.3n
r1 11 2 150
rp1 1 3 150
lp1 3 4 2.3n
cp1 4 5 30f
cp2 5 6 100n
rp2 6 1 500
rp3 5 1 50k
cm1 2 7 30f
lm1 7 8 2.3n
rm1 8 5 150
cm2 2 9 100n
rm2 9 5 500
rm3 2 5 50k
rom 5 0 40
lom 5 0 30u
.ends
SPICE Subcircuit Data (2 mm span)
.subckt N5445A_Brwsr2mmSpn 1 2
c1 1 10 20f
l1 10 11 2.3n
r1 11 2 250
rp1 1 3 250
lp1 3 4 2.3n
cp1 4 5 30f
cp2 5 6 100n
rp2 6 1 500
rp3 5 1 50k
cm1 2 7 30f
lm1 7 8 2.3n
rm1 8 5 250
cm2 2 9 100n
rm2 9 5 500
rm3 2 5 50k
rom 5 0 40
lom 5 0 30u
.ends
InfiniiMax III+ Series Probes User’s Guide
147
9
SPICE Models
SPICE Subcircuit Data (3 mm span)
.subckt N5445A_Brwsr3mmSpn 1 2
c1 1 10 20f
l1 10 11 2.3n
r1 11 2 300
rp1 1 3 300
lp1 3 4 2.3n
cp1 4 5 30f
cp2 5 6 100n
rp2 6 1 500
rp3 5 1 50k
cm1 2 7 30f
lm1 7 8 2.3n
rm1 8 5 300
cm2 2 9 100n
rm2 9 5 500
rm3 2 5 50k
rom 5 0 40
lom 5 0 30u
.ends
148
InfiniiMax III+ Series Probes User’s Guide
SPICE Models
9
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.
SPICE Subcircuit Data
.subckt N5444A_2p92mm 01
t01 01 0 02 0 z0=50.1226
t02 02 0 03 0 z0=48.6767
t03 03 0 04 0 z0=50.0690
t04 04 0 05 0 z0=50.1226
t05 05 0 06 0 z0=47.8189
t06 06 0 07 0 z0=48.4842
t07 07 0 08 0 z0=51.5636
t08 08 0 09 0 z0=51.3432
t09 09 0 10 0 z0=50.1231
t10 10 0 11 0 z0=50.9715
t11 11 0 12 0 z0=51.2048
t12 12 0 13 0 z0=49.3079
t13 13 0 14 0 z0=48.3903
t14 14 0 15 0 z0=50.1144
t15 15 0 16 0 z0=51.9126
t16 16 0 17 0 z0=51.1671
t17 17 0 18 0 z0=48.7858
t18 18 0 19 0 z0=49.7704
t19 19 0 20 0 z0=54.9662
t20 20 0 21 0 z0=55.6338
t21 21 0 22 0 z0=50.6714
t22 22 0 23 0 z0=47.9673
t23 23 0 24 0 z0=48.6942
t24 24 0 25 0 z0=51.3949
t25 25 0 26 0 z0=52.4910
t26 26 0 27 0 z0=50.3990
t27 27 0 28 0 z0=49.9508
t28 28 0 29 0 z0=50.5692
t29 29 0 30 0 z0=49.8539
t30 30 0 31 0 z0=51.6006
t31 31 0 32 0 z0=49.4657
t32 32 0 33 0 z0=51.3932
t33 33 0 34 0 z0=50.6702
t34 34 0 35 0 z0=50.1108
t35 35 0 36 0 z0=50.9072
t36 36 0 37 0 z0=50.6940
t37 37 0 38 0 z0=50.1733
t38 38 0 39 0 z0=50.2609
t39 39 0 40 0 z0=50.1355
t40 40 0 41 0 z0=51.2333
rterm 41 0 50.3
.ends
InfiniiMax III+ Series Probes User’s Guide
td=4.5p
td=4.5p
td=4.5p
td=4.5p
td=4.5p
td=4.5p
td=4.5p
td=4.5p
td=4.5p
td=4.5p
td=4.5p
td=4.5p
td=4.5p
td=4.5p
td=4.5p
td=4.5p
td=4.5p
td=4.5p
td=4.5p
td=4.5p
td=4.5p
td=4.5p
td=4.5p
td=4.5p
td=4.5p
td=4.5p
td=4.5p
td=4.5p
td=4.5p
td=4.5p
td=4.5p
td=4.5p
td=4.5p
td=4.5p
td=4.5p
td=4.5p
td=4.5p
td=4.5p
td=4.5p
td=4.5p
149
9
150
SPICE Models
InfiniiMax III+ Series Probes User’s Guide
Index
Numerics
D
K
86100D DCA-X sampling
oscilloscope, 33
dialog box
Probe Amplifier, 24, 50
Probe Configuration
Setup, 24
Probe Offset, 27
Select Probe Head, 21
differential measurements, 9,
22
dimensions, 94
probe amp, 96
DUT
connecting to, 18
ungrounded, 25
Keysight Technologies,
contacting, 38
E
N2787A 3D probe
positioner, 54
N2830/1/2A probe
markings, 11
N2836-68701 replacement
axial resistor kit, 72
N2836A
replacing resistor tips, 72
solder-in probe head, 59
N2838A ZIF tip, 72
N2848A
cleaning, 67
connecting, 66
QuickTip head, 64
N5439A probe head, 44
N5441A
replacing head wires, 76
solder-in probe head, 56
N5443A PV fixture, 32, 81
N5444A SMA probe head, 42
N5445A
adjustable tip span, 51
adjustable tip span for
calibration, 52
differential browser probe
head, 14, 50
mounting holes, 52
N5448A 2.92 mm head flex
cables, 43
A
accessories
available, 32
static-safe, 18
altitude, 94
AutoProbe Interface, 13
Aux Out connector, 81
available probe heads, 10
B
bandwidth, 9
browser
mounting Holes, 52
tips, 54
C
Cal Out connector, 81
calibration
failure, 37
probe, 81
CAT I, 95
CE mark, 95
channel identification rings, 14
characteristics, 94
circuit connections, 22, 23
cleaning the probe, 14
common mode
measurements, 9, 22
Conductive table-mat, 17
connecting to DUT, 18
connecting, probe, 18
connections
circuit, 23
InfiniiMode, 22
contacting, Keysight
Technologies, 38
InfiniiMax III+ Series Probes User’s Guide
E2655C PV fixture, 32
Electrostatic discharge, 16
environmental conditions, 94
ESD, 16
ESD wrist strap, 16
Extreme Temperature
Extension Cable, 56
extreme temperature extension
cable, 32
G
general characteristics, 94
ground socket, 17
H
headlight, 14, 50
humidity, 94
I
InfiniiMode, 22, 64
inspecting, 6
isolation, 18
L
Light button, 14, 50
low temperature hot glue, 69
M
measurement category, 95
Menu button, 14
N
151
Index
N5449A high impedance
adapter, 33
N5450B extreme temperature
extension cable, 32, 56
N7000/1/2/3A probe
markings, 12
O
offset, 27
operating environment, 94
oscilloscope, 19
compatible, 15
oscilloscope channel, 19
P
performance
plots, 97
test record, 125, 139
verification, 105, 127
pollution degree, 94
power requirements, 94
probe
case, calibration
certificate, 7, 8
cleaning, 14
connecting, 18
connecting to DUT, 18
dimensions, 96
heads, 10, 39
inspecting, 6
markiings, 11, 12
offset, 27
service, 38
ungrounded DUTs, 25
Probe Amplifier dialog box, 50
probe calibration, 81
Probe Comp terminals, 81
Probe Configuration Setup
dialog box, 24
probe leads, 22
Probe Offset dialog box, 27
putty, 68
PV fixture
E2655C, 32
N5443A, 32
Q
R
Z
resistor dimensions, 76
returning for service, 38
ZIF Probe Head
connecting, 47
ZIF tips, 44
S
safety, 34
specifications, 95
Safety Considerations, 34
safety warnings, 34
sampling oscilloscope, 33
Select Probe Head dialog
box, 21
service, 37
single-ended
measurements, 9, 22
slew rate requirements, 30
slew rates, 30
SMA probe head, 42
solder-in probe head, 56, 59
soldering
N2836A to DUT, 60
N2848A to DUT, 65
N5441A to DUT, 57
tips, 70
ZIF tip to DUT, 45
specifications and
characteristics, 87
SPICE models, 141
static-safe accessories, 18
strain relieving, 68
T
Tack-putty, 68
temperature, 94
temperature chamber, 32
tip span gauge, 52
U
ungrounded DUTs, 25
W
WEEE Directive, 95
weight, 94
wrist-strap, 17
QuickTip head, 64
152
InfiniiMax III+ Series Probes User’s Guide
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