Teledyne Lecroy ZS1000 User manual

Operator’s
Manual
ZS1000, ZS1500, ZS2500
High-Impedance,
Active Probe

ZS1000, ZS1500, ZS2500
High-Impedance Active Probes
Operator’s Manual

© 2014 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 distribute and duplicate Teledyne LeCroy documentation for their own
internal educational purposes.
WaveSurfer, WaveRunner, WavePro, WaveMaster and Teledyne LeCroy are registered
trademarks 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.
Warranty
Teledyne Lecroy warrants this oscilloscope accessory for normal use and operation
within specification for a period of one year from the date of shipment. Spare parts,
replacement parts and repairs are warranted for 90 days.
In exercising its warranty, Teledyne LeCroy, at its option, will either repair or replace any
assembly returned within its warranty period to the Customer Service Department or an
authorized service center. However, this will be done only if the product is determined
by Teledyne LeCroy’s examination to be defective due to workmanship or materials, and
the defect is not caused by misuse, neglect, accident, abnormal conditions of operation,
or damage resulting from attempted repair or modifications by a non-authorized service
facility.
The customer will be responsible for the transportation and insurance charges for the
return of products to the service facility. Teledyne LeCroy will return all products under
warranty with transportation charges prepaid.
This warranty replaces all other warranties, expressed or implied, including but not
limited to any implied warranty of merchantability, fitness or adequacy for any particular
purposes or use. Teledyne LeCroy shall not be liable for any special, incidental, or
consequential damages, whether in contract or otherwise.
924282-00
May, 2014

Operator’s Manual
TABLE OF CONTENTS
Safety Instructions ................................................................................. 1
Symbols.............................................................................................. 1
Precautions ........................................................................................ 1
Operating Environment...................................................................... 2
Introduction............................................................................................. 2
Key Benefits....................................................................................... 2
Standard Accessories........................................................................ 3
Features and Accessories..................................................................... 4
Tips..................................................................................................... 5
Grounds.............................................................................................. 7
Leads.................................................................................................. 8
Grabbers ............................................................................................ 8
Probe Holder...................................................................................... 9
Probe Operation...................................................................................... 9
Handling the Probe ............................................................................ 9
Connecting the Probe to an Oscilloscope.......................................... 9
Operation with a Teledyne LeCroy Oscilloscope............................. 10
Connecting the Probe to the Test Circuit......................................... 10
High Frequency Measurements....................................................... 11
Probe Impedance and Equivalent Circuit .......................................... 14
ZS1x00 Impedance.......................................................................... 14
ZS1x00 Equivalent Circuit................................................................ 14
ZS2500 Impedance.......................................................................... 15
ZS2500 Equivalent Circuit................................................................ 15
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ZS Series High-Impedance, Active Probes
Care and Maintenance.......................................................................... 16
Cleaning ...........................................................................................16
Calibration Interval ........................................................................... 16
Service Strategy...............................................................................16
Returning a Probe for Calibration or Service ...................................16
Replacement Parts...........................................................................18
Performance Verification ..................................................................... 18
Required Test Equipment.................................................................18
Preliminary Procedure......................................................................19
Functional Check.............................................................................. 20
Verification Procedure...................................................................... 21
Performance Verification Test Record .............................................24
Reference Material................................................................................ 26
Specifications ................................................................................... 26
Certifications..................................................................................... 26
Contact Teledyne LeCroy.................................................................28
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Operator’s Manual
Safety Instructions
This section contains instructions that must be observed to keep this
oscilloscope accessory operating in a correct and safe condition. You are
required to follow generally accepted safety procedures in addition to the
precautions specified in this section. The overall safety of any system
incorporating this accessory is the responsibility of the assembler of the
system.
Symbols
These symbols may appear on the probe body or in this manual to alert you to
important safety considerations.
CAUTION. Potential for damage to probe or instrument it is connected
to. Attend to the accompanying information to protect against personal
injury or damage. Do not proceed until conditions are fully understood
and met.
ELECTROSTATIC DISCHARGE (ESD) HAZARD. The probe is susceptible to
damage if anti-static measures are not taken.
DOUBLE INSULATION
Precautions
Connect and disconnect properly. Connect probe to the measurement
instrument before connecting the test leads to a circuit/signal being tested.
Use only within operational environment listed. Do not use in wet or explosive
atmospheres.
Use indoors only.
Keep product surfaces clean and dry.
Be careful with sharp tips. The tips may cause bodily injury if not handled
properly.
Do not operate with suspected failures. Do not use the probe if any part is
damaged. Cease operation immediately and sequester the probe from
inadvertent use.
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ZS Series High-Impedance, Active Probes
Operating Environment
The accessory is intended for indoor use and should be operated in a clean, dry
environment. Before using this product, ensure that its operating environment is
maintained within these parameters:
Temperature: 5 to 40° C.
Humidity: Maximum relative humidity 80 % for temperatures up to 31 °C
decreasing linearly to 50 % relative humidity at 40° C.
Altitude: Up to 10,000 ft (3,048 m).
Introduction
The ZS1000, ZS1500, and ZS2500 are small, high impedance active probe
designed to meet today’s increasing demand for measurements on a variety of
test points. With low input capacitance and high input resistance, circuit loading
is minimized.
The ZS2500 can be used with Teledyne LeCroy’s WaveSurfer, WaveRunner,
WavePro and WaveMaster series platforms with firmware version 6.5.0.5 or
later.
With the ProBus interface, the ZS1000, ZS1500, and ZS2500 become an integral
part of the oscilloscope. The probe can be controlled from the oscilloscope’s
front panel. The oscilloscope provides power to the probe, so there is no need
for a separate power supply or batteries.
Key Benefits
•High frequency performance
•Low input capacitance
•Wide dynamic range
•ProBus interface
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Operator’s Manual
Standard Accessories
The ZS1000, ZS1500, and ZS2500 probes are shipped with the following standard
accessories:
Standard Accessory Quantity Replacement Part
Number
Straight Pin Lead – Short 1 PK-ZS-003
Straight Pin Lead – Long 1 PK-ZS-004
Right Angle Lead – Short 1 PACC-LD003
Right Angle Lead – Long 1 PACC-LD004
Y Lead Adapter 1 PK-ZS-005
Micro-Grabber Pair 1 PK-ZS-007R and PK-ZS-007B
Ground Blade – Wide 1 PK-ZS-011
Probe Tip – Standard 3 PK-ZS-001
Right Angle Socket 1 PK-ZS-006
Offset Ground – Z Lead 1 PK-ZS-002
Ground Blade – Narrow 1 PK-ZS-008
Copper Tape 2 PK-ZS-009
Pogo Tip
1
PK-ZS-013
2.54mm Square Pin Adapter
1
PK-ZS-012
Channel ID Clips (Set of 4 colors)
4
PK-ZS-010
Freehand Probe Holder 1 PACC-MS005
Bent Tip 1 PACC-PT005
IC Tip 1 PACC-PT003
Pogo Ground Lead 1 PACC-CD008
Instruction Manual 1 ZSSERIES-OM-E
Certificate of Calibration 1 ZS-CC
For part number information for standard and optional accessories refer to, Care
and Maintenance, Replaceable Parts List.
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ZS Series High-Impedance, Active Probes
Features and Accessories
The ZS1000, ZS1500, and ZS2500s probes are provided with numerous features
and accessories to make probing and connecting to different test points easier
than ever.
•The small, low mass probe head is designed for ease of use and high
performance.
•The probe tip socket fits easily onto 0.025 inch square pins for direct
access to test points. Several different adapters are available which
connect directly in the probe socket.
•The ground socket will accept several different ground leads to provide a
short ground path for high frequency performance.
ZS1000, ZS1500, ZS2500 Probe Exploded-View Diagram
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Operator’s Manual
Tips
Straight Tip
The straight tip is rugged and designed for general
probing. Fits in either
probe socket. (PK-ZS-001)
IC Lead Tip
The IC Lead Tip is covered in insulation on all sides
(except for a small edge), this tip was designed to
prevent shorting neighboring IC leads. The gold part
of the tip is not insulated and should touch the IC lead
to be tested. It is one
-size-fits-all and will work with
any IC lead pitch. Fits in either probe socket.
(PACC-
PT003)
Bent Tip
The Bent Tip is made out of titanium, this tip is ideal
for situations that require the user to hold the
probe
parallel to the circuit board under test. Also gives you
more control when holding the probe like a pencil.
Fits in either probe socket.
(PACC-PT005)
Pogo Tip
The pogo tip provides z axis compliance. The tip can
fit into a socket or via
and onto an IC leg.
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ZS Series High-Impedance, Active Probes
Tips, continued
Discrete SMD Tip
The crescent shape of this tip is designed to fit tightly
on capacitors, resistors, transistors and other surface
mount components with discrete leads. Fits in either
probe socket.
2.54 mm Square Pin
Ada
pter
2.54 mm Square Pin Adapter. The 2.54 mm square pin
adapter fits into both the input and ground lead of
the ZS probe for easy connection to standard 2.54
mm square pin spacing on a circuit board.
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Operator’s Manual
Grounds
Offset Ground
The offset pin is designed to be attached to either socket
of the probe head. The offset pin is the highest quality
grounding solution and is recommended in high
frequency applications.
The offset ground is designed to connect to the ground
socket and wrap around the probe
head. This gives the
ability to a probe signal and ground that are extremely
close together. The short length provides high
-quality
grounding for high-frequency applications.
Ground Blade
(narrow)
and
Copper Pad
The Ground Blade and Copper Pad are intended to work
together for the best grounding solution for probing an
IC. The Ground Blade is designed to provide a short, low
inductance ground path. The Copper Pad is adhesive
backed to stick to the top of an IC, and can then be
soldered to the IC gro
und.
Ground Blade (wide)
The wide ground blade is ideal for use when the best
quality ground is needed. The wide blade offers the
minimal inductance compared to the narrow ground
blade.
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ZS Series High-Impedance, Active Probes
Leads
While longer leads provide greater flexibility when connecting the probe to a
circuit, the added inductance may degrade the fidelity of high frequency signals.
See Section 4 for additional information.
Short and Long
Straight Pin Lead
These leads have a socket on one end and a square pin
on the other to connect
to the input or ground socket
of the probe body, and may be used for general
purpose probing.
Short and Long Right
Angle Pin Lead
These leads have a socket on one end with a right
angle and a square pin on the other to connect to the
input or ground
socket of the probe body, and may be
used for general purpose probing.
Y Lead Adapter
This lead is used for both ground and input lead
simultaneously. It has two sockets on one end and two
square pins on the other and may be used for general
purpose pro
bing.
Grabbers
Micro- and Mini-
Grabbers
The micro-grabbers are ideal for connecting to small
IC legs or pins very tightly spaced.
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Operator’s Manual
Probe Holder
Freehand Probe Holder
The FreeHand lets you focus on the oscilloscope screen
instead of on maintaining
contact to multiple test
points. It allows the user to concentrate on what is
really important
– the waveform.
It is designed to keep most of the weight on the probe
tip and will prevent lost contact when a bump to the
table shakes the circuit under test.
Probe Operation
Handling the Probe
The ZS series 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 or exposing the probe cable to
sharp bends.
ESD Sensitive: The tips of the probes are sensitive to Electrostatic
Discharge (ESD). Avoid causing damage to the probe by always
following anti-static procedures (wear wrist strap, etc.) when using or
handling the probe.
Connecting the Probe to an Oscilloscope
The ZS1000, ZS1500, and ZS2500 probes have been designed for use with
Teledyne LeCroy’s WaveSurfer, WaveRunner, WavePro, and WaveMaster
platforms equipped with the ProBus interface. When you attach the probe
output connector to the oscilloscope’s input connector, the oscilloscope
recognizes the probe, provides proper termination and activates the probe
control functions in the user interface.
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ZS Series High-Impedance, Active Probes
Operation with a Teledyne LeCroy Oscilloscope
When the ZS1000, ZS1500, or ZS2500 probe is connected to any compatible
Teledyne LeCroy oscilloscope, the displayed scale factor and measurement
values are automatically adjusted.
The probe can be controlled through the oscilloscope graphical user interface.
When connected, a Probe dialog appears behind the corresponding channel
dialog. Refer to your oscilloscope’s manual for specific operation instructions.
Turning the Volts/Div knob controls the oscilloscope’s scale factor to give full
available dynamic range up to 2 V/div (16 V peak to peak). Turning the channel
Offset knob controls the probe input offset circuit over its range of ±12 V.
Connecting the Probe to the Test Circuit
To maintain the high performance capability of the probe in measurement
applications, care must be exercised in connecting the probe to the test circuit.
Increasing the parasitic capacitance or inductance in the input paths may
introduce a “ring” or slow the rise time of fast signals. Input leads which form a
large loop area will pick up any radiated electromagnetic field which passes
through the loop and may induce noise into the probe input.
Using one of the available accessories makes the ZS2500 probe with its small
profile and low mass head ideally suited for applications in dense circuitry.
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Operator’s Manual
High Frequency Measurements
Probe Input Loading
When you touch a probe to the circuit under test, the probe will affect your
measurement because of the probe’s input impedance introduced into the
circuit. All probes present resistive, capacitive and inductive loading.
Inductive Loading (Lead Length)
A significant element in this circuit is the inductance shown in the input ground
leads of the oscilloscope probe.
Example probe input equivalent circuit. Actual diagrams p.14.
The ground lead is the primary return path for the current resulting from the
input voltage acting on the probe’s input impedance. The ground lead and input
lead inductances act with the probe’s input capacitance to form series L-C
network. The impedance of a series LC network drops dramatically at its
resonant frequency. This is the cause of the "ring" we often see after the leading
edge of pulses in measured waveforms.
This effect is referred to as ground lead corruption. Because it is impossible to
eliminate either the L or C from this circuit, the method to improve waveform
fidelity is to raise the resonant frequency beyond the bandwidth of interest in
the measurement.
The resonant frequency of a simple LC circuit can be represented by:
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ZS Series High-Impedance, Active Probes
The resonant frequency of a series LC circuit can be raised by decreasing the
inductance, capacitance or both. Since the input capacitance is already very low
and cannot be reduced, you can only try to reduce the inductance. This can be
accomplished by using the shortest possible input lead as well as the shortest
possible ground lead.
For example, to obtain the shortest possible ground lead when measuring IC
related signals, attach a small piece of copper clad material to the top of the IC
package and connect this to the package grounding wires.
Using the shortest ground lead and input lead available makes probing signals on
the package easier and makes for the shortest lead length for the best signal
fidelity. To illustrate how dramatic this effect is, we will work a simple example.
Assuming an input capacitance of 0.9 pF and a total lead length (input and
ground) of 2 inches (inductance of ≈ 25 nH/inch) such a setup may cause ringing
with a resonant frequency (f0) of:
This frequency is well within the passband of the probe and therefore shows up
as part of the measured signal at faster time/div settings. To determine how fast
a waveform to be measured can be without causing ringing on a probe like this,
divide the BW (ringing frequency) of the probe into 0.35:
Any input signal with a rise time faster than 0.47 ns can cause ringing.
Capacitive Loading
Capacitive loading is usually the most troublesome of the three loading effects.
It can affect the rise time, bandwidth and delay time measurements. At higher
frequencies the capacitive loading can affect the amplitude as well as the
waveshape of the measured signal by introducing an exponential response to
the waveform.
For a simple RC network the time constant of this exponential response is:
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Operator’s Manual
Where Ctotal is the combined probe and circuit capacitance and Rtotal is
combined circuit and probe resistance.
For a setup where Ct = 0.9 pF and a source resistance is 250 Ω, the measured
rise time will be 0.495 ns, which will correspond to a bandwidth of 909 MHz,
assuming no inductive loads.
trise = 2.2 x 0.9 x 10-12 x 250 Ω = 0.495 ns
Parallel combination of 250 Ω and 1 MΩ is still 250 Ω
Example Probe input equivalent circuit. Actual diagrams p.14.
To illustrate the effect of capacitive loading at higher frequencies:
At a frequency of 750 MHz the reactance of the 0.9 pF capacitance is 236 Ω, and
at 1.0 GHz the reactance has been lowered to 177 Ω.
If, at a given frequency, the source impedance is large with respect to the input
impedance, a measurable reduction in the output signal amplitude may occur.
where Zprobe is the probe’s input impedance and Zsource is the source
impedance.
For example: At 750 MHz, where the probe input impedance has reduced to 236
Ω, and a source resistance of 250 Ω the probe output amplitude is reduced to:
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ZS Series High-Impedance, Active Probes
Probe Impedance and Equivalent Circuit
ZS1x00 Impedance
ZS1x00 Equivalent Circuit
10
100
1000
10000
100000
1000000
10Hz 1kHz 100kHz 10MHz 1000MHz
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