Teledyne Lecroy RP4030 Bedienungsanleitung

Operator’s Manual

RP4030

Power Rail Probe

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RP4030 Power Rail Probe Operator’s Manual

Unauthorized duplication of Teledyne LeCroy documentation materials other than for internal

sales and distribution purposes is strictly prohibited. However, clients are encouraged 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.

929963-00, Rev A

September, 2018

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Operator’s Manual

Contents

Safety Instructions..................................................................................................... 1

Symbols ...................................................................................................................... 1

Precautions................................................................................................................. 1

Introduction ................................................................................................................ 3

Key Features............................................................................................................... 3

Compatibility............................................................................................................... 5

Probe Kit...................................................................................................................... 6

RP4000-BROWSER Accessory .................................................................................. 7

Other RP4030 Accessories........................................................................................ 8

Specifications...........................................................................................................10

Nominal Characteristics ..........................................................................................10

Warranted Characteristics.......................................................................................10

Typical Characteristics ............................................................................................10

Physical Characteristics ..........................................................................................11

Probe Impedence vs. Frequency.............................................................................11

Frequency Response ...............................................................................................12

Operation...................................................................................................................15

Handling the Probe...................................................................................................15

Operating from the Oscilloscope ............................................................................15

Connecting to the Circuit .........................................................................................17

Performance Verification.........................................................................................24

Required Test Equipment ........................................................................................24

Functional Check......................................................................................................25

Performance Verification Test ................................................................................25

RP4030 Test Record ................................................................................................29

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RP4030 Power Rail Probe

Care and Maintenance .............................................................................................30

Cleaning ....................................................................................................................30

Calibration Interval ...................................................................................................30

Service Strategy .......................................................................................................30

Troubleshooting .......................................................................................................30

Returning a Product for Service..............................................................................31

Warranty....................................................................................................................33

Certifications ............................................................................................................34

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Operator’s Manual

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, possibility of electric shock.

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.

Equipment protected by double insulation or reinforced insulation.

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 protection mechanisms.

Do not use the probe for measurements on Mains circuits.

Do not overload; observe all ratings. To avoid electric shock or fire, do not connect the current

probe to any wire that carries voltages or currents that exceed the ratings of the probe.

Connect and disconnect properly. Connect the probe to the measurement instrument before

connecting to the circuit being measured. Avoid damaging the cable through excessive bending.

Use only indoors and within the operational environment listed. Do not use in wet or explosive

atmospheres.

Do not remove the probe's casing. Touching exposed connections may result in electric shock.

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RP4030 Power Rail Probe

Keep product surfaces clean and dry.

Handle with care. Probe tips are sharp and may cause injury if not handled properly.

Comply with the maximum input voltage vs. frequency derating when measuring voltage that

includes a high frequency component.

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.

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Operator’s Manual

Introduction

The Teledyne LeCroy RP4030 Power Rail Probe meets the specific requirements of those who

need to acquire a low-voltage DC signal as part of testing:

•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 RP4030 will acquire a low-impedance, low-voltage DC power/voltage rail signal without

loading the device under test (DUT). It provides high offset―allowing DC power/voltage rail

signal to be display in the vertical center of the oscilloscope―and high sensitivity (gain) with

low noise.

Key Features

•High offset capability (+/-30 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 operation with very low additive noise levels

of 50 μVrms probe noise, referenced to the input of the probe. When used with an HDO

12-bit oscilloscope at 1 GHz bandwidth, this equates to 140 μVrms system noise at

1 mV/div or 210 μVrms system noise at 5 mV/div, an approximately 5% increase in

oscilloscope only noise.

•50 ΩDC coupled to the oscilloscope with high DC input impedance (50 kΩ) to minimize

loading on the DUT

•High dynamic range (+/-800 mV)

•4 GHz of bandwidth―ideal for use with a 4 GHz 10-bit HDO9404

•ProBus interface with wide variety of leads for different probing needs

Low- and High-Frequency Measurements at High Bandwidths

The RP4030 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

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RP4030 Power Rail Probe

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.

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 RP4030 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 RP4030 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 16-bit offset resolution over a 30 V range. This permits the offset

value to be set with high precision (~1mV) and accuracy (0.1% ± 3 mV). The output is through a

BMA 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).

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Operator’s Manual

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.

If desired, the cable and lead connection components may be used separately from the RP4030

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 RP4030 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 an RP4030 on every input channel, if required.

Compatibility

The Teledyne LeCroy RP4030 is compatible with a wide range of Teledyne LeCroy oscilloscopes:

•For 64-bit MAUI oscilloscopes, proper functioning of the RP4030 requires XStreamDSO

firmware version 8.2.1.1 or higher.

•For 32-bit MAUI oscilloscopes, proper functioning of the RP4030 requires XStreamDSO

firmware version 8.1.2.0 or higher.

Note: RP4030 is not compatible with WaveSurfer Xs oscilloscopes, which only run up to 32-bit

XstreamDSO 7.2.0.5. Contact Service for available oscilloscope upgrades.

See our website for a full list of compatible models.

For power integrity testing, digital power management, and system power management testing

on one or more DC power/voltage rails, Teledyne LeCroy HDO oscilloscopes are recommended

due to their high resolution, high bandwidth, high inherent offset capability, and the availability

of more than four channels.

For power integrity testing, it may be desirable to use a high-resolution oscilloscope with over

1 GHz bandwidth.

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RP4030 Power Rail Probe

Probe Kit

The following items are shipped with the RP4030 probe. Additional quantities of some parts

may be purchased separately using the part number shown in the table.

Item

Description

Part Number

QTY

Extension Cable

SMA to MCX extension cable, 0.9 meters

42A0000007349

Solder-in Leads

MCX solder-in lead, 18cm long, 4 GHz

RP4000-MCX-LEAD-SI

MCX PCB Mounts

MCX 6mm x 6mm PCB mounts

See accessory list below

Coaxial Cables

MCX to U.FL ultra-miniature coaxial cable,

8cm long, 3 GHz

RP4000-MCX-CABLE-UFL

U.FL PCB Mounts

U.FL 3mm x 3mm PCB mounts

See accessory list below

Adapter

SMA to MCX adapter

42A0000007475

Case

Soft storage case with foam insert

N/A

Operator’s Manual

Printed operator’s manual

N/A

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