Teledyne Lecroy RP2060 User manual

User Manual
RP
2060, RP4060
Power Rail Probes

RP2060/RP4060 Power Rail Probe User Manual
© 2022 Teledyne LeCroy, Inc. All rights reserved.
Unauthorized duplication of Teledyne LeCroy documentation materials is strictly prohibited.
Customers are permitted to duplicate and distribute Teledyne LeCroy documentation for internal
educational purposes.
Teledyne LeCroy is a registered trademark of Teledyne LeCroy, Inc. Windows is a registered
trademark of Microsoft Corporation. Other product or brand names are trademarks or requested
trademarks of their respective holders. Information in this publication supersedes all earlier
versions. Specifications are subject to change without notice.
rpxx60-user-manual_15nov22.pdf
November, 2022

User Manual
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Contents
Safety Instructions ...........................................................................................................................................1
Symbols ............................................................................................................................................................ 1
Precautions ...................................................................................................................................................... 1
Probe Handling................................................................................................................................................ 2
Introduction .......................................................................................................................................................3
Key Features .................................................................................................................................................... 3
Compatibility.................................................................................................................................................... 5
Probe Kit ........................................................................................................................................................... 6
RP4000-BROWSER Accessory ..................................................................................................................... 8
Specifications....................................................................................................................................................9
Warranted Characteristics ............................................................................................................................ 9
Nominal Characteristics ................................................................................................................................ 9
Typical Characteristics .................................................................................................................................. 9
Physical Characteristics ..............................................................................................................................10
Environmental Characteristics ...................................................................................................................10
Probe Impedance vs. Frequency (RP4060 and RP2060) ......................................................................11
RP4060 Frequency Response ....................................................................................................................12
RP2060 Frequency Response ....................................................................................................................14
Frequency Response vs. Source Impedance ..........................................................................................16
Operation ........................................................................................................................................................ 17
Probe Assembly ............................................................................................................................................17
Connecting to the Circuit.............................................................................................................................17
Operating from the Oscilloscope ...............................................................................................................22
Best Practices................................................................................................................................................24
Using the RP4000-BROWSER as a Transmission Line Probe..............................................................25
Performance Verification.............................................................................................................................. 26
Required Test Equipment............................................................................................................................26
Functional Check ..........................................................................................................................................27
Performance Verification Test ...................................................................................................................27

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RP___60 Test Record .................................................................................................................................... 31
Care and Maintenance.................................................................................................................................. 32
Cleaning ..........................................................................................................................................................32
Calibration Interval........................................................................................................................................32
Service Strategy ............................................................................................................................................32
Troubleshooting ............................................................................................................................................32
Returning a Product for Service .................................................................................................................33
Technical Support.........................................................................................................................................33
Warranty .........................................................................................................................................................34
Certifications..................................................................................................................................................35

User Manual
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Safety Instructions
Follow these instructions to keep the probe operating in a correct and safe condition. Observe
generally accepted safety procedures in addition to the precautions specified here.
The overall safety of any system incorporating this accessory is the responsibility of the assembler
of the system.
Symbols
These symbols appear on the probe body or in documentation to alert you to important safety
considerations.
CAUTION of damage to probe or instrument, or WARNING of hazard to health. Refer to
the manual to protect against personal injury or damage. Do not proceed until
conditions are fully understood and met.
ESD CAUTION. Risk of Electrostatic Discharge (ESD) that can damage the probe or
instrument if anti-static measures are not taken.
Precautions
Comply with the following safety precautions to avoid personal injury or damage to your
equipment:
Use only as specified. The probe is intended to be used only with compatible Teledyne LeCroy
instruments. Using the probe and/or the equipment it is connected to in a manner other than
specified may impair the probe’s protection mechanisms.
Use only accessories compatible with the probe. Use only accessories that are rated for the
application. Using accessories other than those shipped with the probe may create an electrical
hazard.
Connect and disconnect properly. Connect the probe to the oscilloscope before connecting to the
circuit being measured. De-energize the test circuit before connecting/disconnecting probe tips
(excluding browsers). Disconnect probe from circuit before disconnecting probe from
oscilloscope.
Do not use for measurements on Mains circuits.
Do not overload; observe all terminal ratings. Comply with the frequency derating when measuring
signals with a high frequency component.
Do not excessively bend cables. Avoid tight radius bends, crushing, crimping, twisting or otherwise
stressing cables.

RP2060/RP4060 Power Rail Probe
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Do not remove the probe’s casing. Touching exposed connections may result in electric shock.
Do not disassemble the probe or remove inside parts. Refer all service to Teledyne LeCroy
personnel.
Use only indoors within the operational environment listed. Do not use in wet or explosive
atmospheres.
Keep product surfaces clean and dry.
Do not operate with suspected failures. Before each use, inspect the probe and accessories for
damage. If any part is damaged, cease operation immediately and secure the probe from
inadvertent use. Do not operate with suspected failures. Before each use, inspect the probe and
accessories for damage such as tears or other defects in the probe body, cable jacket, accessories,
etc. If any part is damaged, cease operation immediately and sequester the probe from inadvertent
use.
Probe Handling
The rail probe is a precision test instrument. Exercise care when handling and storing the probe. Do
not sharply bend leads or cables, or put excessive strain on them.
ESD Sensitive: Avoid damaging the probe by always following anti-static procedures (wear
wrist strap, etc.) when using or handling the probe.
CAUTION: Maximum Safe Input Voltage for hand-held use is 60 Vdc (referenced to
ground) per IEC/EN 61010-031:2015.

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Introduction
The Teledyne LeCroy RP2060 and RP4060 Power Rail Probes meet the specific requirements of
those who need to acquire a low-voltage DC signal in order to test:
•Digital power management components such as power management IC (PMIC);
voltage regulator module (VMR); point-of-load (POL) switching regulator; or
low-dropout regulator
•Complete embedded systems containing digital power management components
The rail probes will acquire a low-impedance, low-voltage DC power/voltage rail signal without
loading the device under test (DUT). They provide high sensitivity (gain) with low noise and high
offset―allowing DC power/voltage rail signals to be displayed in the vertical center of the
oscilloscope.
Key Features
•High offset capability (±60 V) to permit the DC signal to be displayed in the vertical center
of the oscilloscope grid, regardless of the gain/sensitivity setting
•Low attenuation (nominally 1.2:1) for very low probe only noise levels of:
oRP2060, approximately 110 uVrms
oRP4060, approximately 160 uVrms
•50 ΩDC coupled to the oscilloscope with high DC input impedance (50 kΩ) to minimize
loading on the DUT
•High dynamic range (±800 mV)
•2 or 4 GHz of bandwidth
•ProBus interface with wide variety of leads for different probing needs
Low and High Frequency Measurements at High Bandwidths
A rail probe is a superior solution to commonly used alternative methods.
One commonly used method is to terminate a 50 Ωtransmission line into 1 MΩ coupling at the
oscilloscope. While this will provide acceptable bandwidth performance for some, the loading
impedance of a 50 Ω cable terminated to a 1 MΩ input will depend upon the length of the 50 Ω
cable and will have null values when frequency is proportional to the length of the cable. A damping
resistor could be used to mitigate this impact, but the 1 MΩ input to the oscilloscope is typically
limited to 500 MHz, and the oscilloscope must inherently have high offset-adjust capability
equivalent to the DC rail voltage at the most sensitive gain settings. This is rarely the case, although
Teledyne LeCroy HDO oscilloscopes are a notable exception.

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To avoid the need for high offset in the oscilloscope input channel, engineers may use a DC block
between their cable connection and the oscilloscope input, or AC coupling of the oscilloscope
input. A DC block has a non-ideal low-frequency response (typically blocking DC to 100 kHz or DC
to 10 MHz), which eliminates low-frequency signal content that would normally be seen during
typical oscilloscope acquisition times (100 ns to 10 ms). This approach might show the signal with
a misunderstood non-zero DC offset, or might introduce a “droop” or “sag” in the waveform at a
step voltage change due to the loss of low-frequency content. The frequency response of an
oscilloscope when AC input coupled usually reaches closer to DC (~10 Hz low-pass cutoff), but is
still not ideal.
The rail probe eliminates the above tradeoffs and permits more accurate and more convenient DC
power/voltage rail probing at very high bandwidths.
In the simplified circuit diagram below, the rail probe portion is highlighted in gray. The input is
through a high bandwidth SMA connector, terminated to ground with a 50 kΩ resistor in parallel
with a 0.1 μF capacitor. This termination provides high input impedance near DC and low input
impedance at high frequencies―highly desirable for low impedance DC power rail probing. A two-
stage offset DAC provides ± 60 V range. This permits the offset value to be set with high accuracy
(0.1% ± 3 mV). The output is through a BNC connection to the Teledyne LeCroy ProBus interface
into a 50 Ω oscilloscope termination. An Auto Zero grounding switch permits Auto Zero of the DC
value at any time without disconnecting the probe from the device under test (DUT).
Variety of Leads
An assortment of solder-in leads and MCX or U.FL (compatible with IPX or MMCX) PCB mount
receptacles are supplied for connection to the power rails. Multiple solder-in leads or PCB mount
receptacles can be left in place, while the probe MCX cable is moved from one lead/receptacle to
another as test needs change. The compact (3mm x 3mm) U.FL PCB mount receptacles permit
installation of many PCB mount receptacles on a compact, power dense mobile/handheld PCB. A
separate browser tip accessory (the RP4000-BROWSER) is available at additional cost.

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If desired, the cable and lead connection components may be used separately from the rail probe
as a transmission line probe. This is useful for power sequencing tests where the dynamic range of
the DC power/voltage rail exceeds the ±800 mV rating of the probe. See Connecting to the Circuit.
ProBus Interface
The rail probe uses the ProBus interface to connect to Teledyne LeCroy oscilloscopes. With the
ProBus interface, the probe becomes an integral part of the measuring instrument. Power is
provided to the probe through the interface, so there is no need for a separate power supply or
batteries, and attenuation is automatically identified. All compatible Teledyne LeCroy oscilloscopes
will support the connection of a rail probe on every input channel, if required.
Compatibility
Proper functioning of the rail probe requires the following MAUI (XStreamDSO) firmware versions:
•RP4060, 10.1.x.x or higher (32- or 64-bit MAUI oscilloscopes)
•RP2060, 10.2.x.x or higher (32- or 64-bit MAUI oscilloscopes)
Note: Rail probes are not compatible with any Teledyne LeCroy oscilloscope models that cannot be
updated to the necessary firmware levels. Contact Service for available oscilloscope upgrades.
See our website for a list of compatible oscilloscope models.
For power integrity testing, digital power management, and system power management testing on
one or more DC power/voltage rails, Teledyne LeCroy High Definition Oscilloscopes (HDO and HD
models) are recommended due to their high resolution, high bandwidth, high inherent offset
capability and the availability of eight or more channels.
An oscilloscope with ≥1 GHz bandwidth is recommended for power integrity testing.

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Probe Kit
The following items are shipped with the RPxx60 probe.
SMA-to-MCX Extension Cable
The cable adds a 0.9 m extension from the probe housing to the MCX connectors on leads and
cables, or seats directly into MCX 6 mm x 6 mm PCB Mounts.
MCX Solder-in Leads
4 GHz rated, 18 cm long solder-in leads. Three leads are supplied with the rail probe, and more may
be purchased as accessory or replacement items using part number RP4000-MCX-LEAD-SI.
MCX 6 mm x 6 mm PCB Mount (Receptacle)
The supplied SMA-to-MCX extension cable connects directly to these 6 mm2PCB mounts for
optimum signal fidelity. Three mounts are supplied with the rail probe, and more may be purchased
from TE Connectivity using part number 1061015-1.
Ultra-miniature U.FL Coaxial Cables
An ultra-miniature connector that is ideal for use in very dense or compact circuits, and is
functionally equivalent to IPX and UMCC connectors. This 3 GHz rated coaxial cable assembly
utilizes an IPX connector that was qualified with the U.FL PCB mount receptacles described below.
Three cables are supplied with the rail probe.
NOTE: While there are a variety of ultra-miniature PCB mounts and cables available from other
manufacturers that are compatible with U.FL, Teledyne LeCroy has validated the frequency
response of the supplied U.FL cables and mounts as a system, and we recommend that is how
they be used.
Item
QTY
RP2060/RP4060 Active Voltage Rail Probe
1
SMA-to-MCX Adapter
1
SMA-to-MCX Extension Cable, 0.9 m
1
4 GHz MCX to Solder-in Lead, 18 cm
3
MCX 6 mm x 6 mm PCB Mounts
3
3 GHz MCX-to-U.FL Ultra-miniature Coaxial Cable, 8 cm
3
U.FL 3 mm x 3 mm PCB Mounts
5
Soft Storage Case with Foam Insert
1
Quick Start Guide
1

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U.FL 3 mm x 3 mm PCB Mount (Receptacle)
The 3 mm U.FL PCB mount is one fourth the size of the MCX and accepts the ultra-miniature U.FL
cables. Five are supplied with the rail probe, and more may be purchased from Hirose using part
number U.FL-R-SMT-1(10) T.
MCX-to-SMA Adapter
The adapter allows you to attach the extension cable to SMA connectors on DUTs.
RPxx60 Active Rail Probe Kit

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RP4000-BROWSER Accessory
The RP4000-BROWSER accessory is a ÷1 high-frequency transmission line browser tip. The
RP4000 browser tip and cable attaches to the SMA connector on the rail probe’s housing, which is
terminated with high input impedance near DC and with the oscilloscope’s 50 Ω coupling at high
frequency. The spring-loaded, hinged ground pin in the browser tip contributes to contact stability
while making it easier to reach into dense circuitry.
Additional resistors are supplied so that the browser can be operated as a conventional ÷10 or ÷20
high-frequency transmission line probe connected directly to an oscilloscope SMA or BNC input.
See the instructions in Using the RP4000-BROWSER as a Transmission Line Probe.
CAUTION: When using the rail probe and browser tip together, use only the pre-installed
0 Ωresistor. Only use the 450 Ωor 950 Ωresistors when operating the browser tip as a
conventional transmission line probe separate from the rail probe.
Item
Part Number
QTY
Browser Accessory Kit, includes:
RP4000-BROWSER
Browser Tip body
1
SMA-to-SMA cable
1
÷1 attenuating resistor (0 Ω, pre-installed)
1
÷10 attenuating resistor (450 Ω)
1
÷20 attenuating resistor (950 Ω)
1
Plastic nose housing, blue
1
SMA-to-BNC adapter
1
RP4000-BROWSER Kit

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Specifications
For the most current specifications, see the product datasheet at teledynelecroy.com.
Specifications are subject to change without notice.
NOTE: The components supplied with the rail probe are tested as a system, and the performance
stated here represents the probe when used with these components. Replace lost or damaged
components with factory-certified components to maintain the stated performance.
Warranted Characteristics
Warranted characteristics are parameters with guaranteed performance. Unless otherwise noted,
tests are provided in the Performance Verification Procedure for all warranted specifications.
Bandwidth
(MCX cable with PCB Mount)
RP2060: 2 GHz
RP4060: 4 GHz
Attenuation Accuracy
1% into 50 Ω
Offset Accuracy
±0.1% ±3 mV
Nominal Characteristics
Nominal characteristics describe parameters and attributes that are guaranteed by design, but do
not have associated tolerances.
Offset Range
±60 V
Attenuation
1.2x
DC Input Impedance
50 kΩ
Input Dynamic Range
±800 mV (single-ended)
Maximum Non-Destruct Input Voltage
100 V (DC + Peak AC)
Maximum Non-Destruct AC Voltage
50 Ωoscilloscope input limit
Maximum Safe Input Voltage
60 Vdc (referenced to ground) when hand-held
per IEC/EN 61010-031:2015
Output Termination
50 Ω at oscilloscope input
Typical Characteristics
Typical characteristics are parameters with no guaranteed performance. Tests for typical
characteristics are not provided in the Performance Verification Procedure.
Bandwidth*
4 GHz using MCX Solder-in Lead
3 GHz using U.FL Ultra-miniature Coax Cable with PCB Mount
500 MHz using Browser Tip
Rise Time (10-90%)
RP2060: 220 ps
RP4060: 110 ps
*Bandwidth is lower of probe or tip rating.

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Physical Characteristics
Probe Weight
(with all accessories and carrying case)
620 grams (1.37 lb.) net, including packaging material
Probe Dimensions
Probe: 38.1 mm W x 15.9 mm H x 73 mm L (1 1/2” x 5/8” x 2 7/8”)
SMA-to-MCX Extension Cable: 914 mm (36”) length
MCX Solder-in Lead: 191 mm (7 1/2”) usable length
MCX-to-U.FL Coaxial Cable: 102 mm (4”) usable length
RP4000-BROWSER Dimensions
11.9 mm W x 9.5 mm H x 38 mm (15/32” x 3/8” x 1 1/2”) length
SMA-to-SMA Cable: 1 m (39 3/8”) usable length
Environmental Characteristics
Temperature, Operating
0 °C to 50 °C
Temperature, Non-operating
-40 °C to 70 °C
Relative Humidity
5% to 80% RH (non-condensing) up to 30 °C,
decreasing linearly to 45% RH at 50 °C
Altitude, Operating
3,000 m (9,842 ft.) maximum
Altitude, Non-operating
10,000 m
Pollution Degree
2, indoor use only.
Per IEC/EN 61010-31:2015, this is an operating environment where
normally only dry, non-conductive pollution occurs. Conductivity
caused by temporary condensation should be expected.

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Probe Impedance vs. Frequency (RP4060 and RP2060)

RP2060/RP4060 Power Rail Probe
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RP4060 Frequency Response
RP4060 MCX Cable into MCX PCB Mount
RP4060 with Solder-in Tip

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RP4060 with U.FL Cable into U.FL PCB Mount
RP4060 with Browser Tip

RP2060/RP4060 Power Rail Probe
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RP2060 Frequency Response
RP2060 MCX Cable into MCX PCB Mount
RP2060 with Solder-in Tip

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RP2060 with U.FL Cable into U.FL PCB Mount
RP2060 with Browser Tip

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Frequency Response vs. Source Impedance
The rail probe is intended to probe low-impedance DC voltage and power rails. The probe’s input
impedance is optimized to provide a flat frequency response from DC to rated bandwidth when the
source impedance is very low, but input impedance declines from 50 kΩ at DC to 50 Ω at ~1 MHz.
If the source impedance is high, then the decline in probe input impedance at higher frequencies
will reduce the bandwidth rating of the probe and may unacceptably load the source.
The frequency response and impedance vs. frequency plots above describe probe performance
with a 0 Ω load. If the source impedance is non-zero, then the frequency response will degrade as
shown in the plot below.
NOTE: Near-zero source impedance values (~1 Ω, blue) have little impact on probe performance,
while source impedance values approaching 50 Ω have high impact on probe performance. This is
to be expected based on the probe topology.
MCX Cable into MCX PCB Mount at Increasing Loads
NOTE: The plot above is an emulated representation of the frequency response shelf effect due to
source impedance. Because the probe and oscilloscope are 50 Ω environments at high frequency,
ripple in the bandwidth will increase as source impedance decreases from 50 to 0 Ω. This is not
shown because a source impedance of 0 Ω out to 4 GHz can only be simulated and not measured.
In addition, the ripple is a function of the variation in source impedance vs. frequency of a power
plane, as well as the probing location and geometry of the power plane.