Teledyne Lecroy RP4030 User manual

Operator’s Manual
RP4030
Power Rail Probe
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RP4030 Power Rail Probe Operator’s Manual
© 2018 Teledyne LeCroy, Inc. All rights reserved.
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
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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
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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
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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, 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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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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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
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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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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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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
1
Solder-in Leads
MCX solder-in lead, 18cm long, 4 GHz
RP4000-MCX-LEAD-SI
3
MCX PCB Mounts
MCX 6mm x 6mm PCB mounts
See accessory list below
3
Coaxial Cables
MCX to U.FL ultra-miniature coaxial cable,
8cm long, 3 GHz
RP4000-MCX-CABLE-UFL
3
U.FL PCB Mounts
U.FL 3mm x 3mm PCB mounts
See accessory list below
5
Adapter
SMA to MCX adapter
42A0000007475
1
Case
Soft storage case with foam insert
N/A
1
Operator’s Manual
Printed operator’s manual
N/A
1
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RP4000-BROWSER Accessory
The RP4000-BROWSER tip accessory is a ÷1 high-frequency transmission line browser tip. It
connects to one end of the supplied standard SMA-to-SMA extension cable, while the other end
of this cable terminates at the RP4030 probe, which then terminates at the oscilloscope with
50 Ω coupling with high input impedance. The spring-loaded, hinged ground pin 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 ÷10 or a ÷20
attenuation conventional high-frequency transmission line probe with direct connection to an
oscilloscope SMA input (or BNC input using the included SMA to BNC adapter). In this case, the
included 450 Ω (÷10) or 950 Ω (÷20) probe resistors must be installed in the tip.
CAUTION: When using the RP4030 probe and browser tip together, install the 0 Ω
resistor in the browser. Only install the 450 Ωor 950 Ωresistors when using the browser
tip as a conventional transmission line probe.
Item
Description
Part Number
QTY
Probe Body
Probe body browser tip
PACC-PB001
1
Cable
SMA to SMA probe cable
PACC-CB001
1
Resistor
÷1 attenuating resistor (0 Ω, pre-installed)
927419-00
1
Resistor
÷10 attenuating resistor (450 Ω)
PACC-X1001
1
Resistor
÷20 attenuating resistor (950 Ω)
PACC-X2001
1
Housing
Plastic nose housing, black
PACC-NH001
1
Adapter
SMA to BNC adapter (Standard)
PACC-AD001
1
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Other RP4030 Accessories
Additional quantities of the following accessories may be purchased with the RP4030 or
separately. If ordered with the RP4030, they are shipped inside the RP4030 soft carrying case.
MCX to Solder-in Leads
Three are supplied with the RP4030, and more may be purchased as accessory or replacement
items using part number RP4000-MCX-LEAD-SI.
MCX 6mm x 6mm PCB Mount Receptacles
Three are supplied with the RP4030, and more may be purchased as accessory or replacement
items using part number RP4000-MCX-PCBMOUNT. The supplied SMA to MCX cable connects
directly to these PCB mounts for optimum signal fidelity.
Item
Description
Part Number
QTY
Solder-in Leads
MCX solder-in lead, 18cm long, 4 GHz
RP4000-MCX-LEAD-SI
3
MCX PCB Mounts
MCX 6mm x 6mm PCB mounts
RP4000-MCX-PCBMOUNT
10
Coaxial Cables
MCX to U.FL ultra-miniature coaxial,
8 cm long, 3 GHz
RP4000-MCX-CABLE-UFL
3
U.FL PCB Mounts
U.FL 3mm x 3mm PCB mounts
RP4000-UFL-PCBMOUNT
10
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Operator’s Manual
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Ultra-miniature U.FL Coaxial Cables
Three are supplied with the RP4030, and more may be purchased as accessory or replacement
items using part number RP4000-MCX-CABLE-UFL. U.FL is a Hirose Electric ultra-miniature
connector that is ideal for use in very dense or compact circuits, and is functionally equivalent
to IPX and UMCC connectors. The corresponding U.FL PCB mount is one fourth the size of the
MCX (3mm x 3mm). This coaxial cable assembly utilizes an IPX connector that was qualified
with the U.FL PCB mount receptacles described below.
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 recommends using the supplied
coaxial cable and U.FL PCB mount receptacles as a system (cable connector and PCB mount
together), as this is how the frequency response has been validated.
U.FL 3mm x 3mm PCB Mounts
Five are supplied with the RP4030, and more may be purchased as accessory or replacement
items using part number RP4000-UFL-PCBMOUNT. The MCX to U.FL cables connect between
the SMA to MCX cable and the U.FL PCB mounts.
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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 as part of the RP4030 probe are tested as a system. The
performance presented in this manual represents the probe when used with these components.
If components are lost or damaged, replace them with factory-certified components to maintain
the stated performance.
Nominal Characteristics
Nominal characteristics describe parameters and attributes that are guaranteed by design, but
do not have associated tolerances.
Offset Range
±30 V
Attenuation
1.2x
DC Input Impedance
50 kΩ
Input Dynamic Range
±800 mV (single-ended)
Maximum Non-Destruct Input Voltage
50 V (DC + Peak AC)
Output Termination
50 Ω at oscilloscope input
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
4 GHz using SMA to MCX cable with PCB mount
Attenuation Accuracy
1% into 50 Ω
Offset Accuracy
±0.1% ±3 mV
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 cable with PCB mount
350 MHz using browser
Rise Time (10-90%)
110 ps
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Physical Characteristics
RP4030 Weight
(with all accessories and carrying case)
620 grams (1.37 lb.) net of packaging material
RP4030 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 Cable: 914 mm L (36”)
MCX to Solder-in Lead: 191 mm (7 1/2”) usable length
MCX to U.FL Plug Coaxial Cable: 102 mm (4”) usable length
RP4000-BROWSER Dimensions
11.9 mm W x 9.5 mm H x 38 mm L (15/32” x 3/8” x 1 1/2”)
SMA to SMA Cable: 1 m (39 3/8”) usable length
Probe Impedence vs. Frequency
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Frequency Response
Following is the same data presented with a different magnitude and frequency scale.
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Operation
NOTE: Operation of the probe as described requires the correct version of the XStreamDSO
firmware (see p.5). To confirm the version installed, choose Utilities > Utilities Setup from the
oscilloscope menu bar, then open the Status dialog.
Handling the Probe
The RP4030 probe is a precision test instrument. Exercise care when handling and storing the
probe. Always handle the probe by the probe body or compensation box. Avoid putting
excessive strain on or exposing the probe cable to sharp bends.
ESD Sensitive: The probe tips are sensitive to Electrostatic Discharge (ESD). Avoid
damaging the probe by always following anti-static procedures (wear wrist strap, etc.)
when using or handling the probe.
Operating from the Oscilloscope
The RP4030 probe has been designed for use with Teledyne LeCroy oscilloscopes equipped
with the ProBus interface. When the probe output connector is attached to the oscilloscope’s
input connector, the instrument will:
•Recognize the probe
•Set the oscilloscope input termination to DC50Ω
•Set the probe attenuation to 1.2x
•Activate the probe control functions on the oscilloscope user interface.
For accurate measurements, allow the probe to warm up for at least 20 minutes after being
connected to the oscilloscope.
Vertical Scale (V/div), Coupling, Bandwidth (BWL), and Attenuation are controlled from the
Channel setup dialog (Cn).
Channel setup dialog (Cn) with Probe dialog (Cn RP4030) behind it.
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The probe’s attributes are shown on the RP4030 Probe dialog, which appears behind the Cn
dialog when a probe is detected. The Probe dialog also contains controls for Auto Zero.
RP4030 Probe dialog.
Vertical Scale (Volts/div)
The oscilloscope automatically factors in the nominal 1.2x attenuation and adjusts the Vertical
Scale gain readout to reflect the attenuation value. No further scaling adjustment is needed.
NOTE:The maximum input dynamic range of the RP4030 is +/-800 mV. The maximum
oscilloscope gain setting with the RP4030 connected is +/-200 mV/div. Most DC rail voltage
exceeds 800 mV, so some applied offset is required to display the signal on the oscilloscope.
Offset
The RP4030 has built-in offset capability of ±30 V using a 16-bit offset DAC for high offset
accuracy and resolution. This allows you to remove a DC bias voltage from the input signal
while maintaining DC coupling. By using probe offset, the full dynamic range of the probe can be
centered around the vertical center of the oscilloscope grid so as to permit high sensitivity gain
settings to be used on a DC-biased signal.
Probe offset is controlled using the front panel Vertical OFFSET knob. The amount of offset
applied is displayed on the channel descriptor box.
NOTE:On Teledyne LeCroy oscilloscopes, the input offset displayed is the amount of offset
required to zero the applied voltage (e.g., a -1 V offset is required to vertically center a 1 V DC rail
on the grid).
Coupling
When the RP4030 is connected to the oscilloscope,input coupling is automatically set to
DC50Ω and cannot be changed. If using the browser tip as a transmission-line probe directly
connected to the oscilloscope, manually set Coupling to DC50Ω.
Bandwidth Limit
The bandwidth of the RP4030 ranges up to 4 GHz (depending on the lead attachment). If it is
desired to limit bandwidth to less than the rating, make a selection from the Cndialog
Bandwidth control.
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