Teledyne Lecroy ADP300 User manual

Operator’s
Manual
A
DP300/305
Active Differential Probe

© 2013 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, 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.
923079-00 Rev A
June 2013

Table of Contents
Safety Instructions...................................................................................1
Introduction ............................................................................................3
Specifications ..........................................................................................4
Standard Accessories ...............................................................................7
Operation..............................................................................................11
Connecting the Probe to the Test Instrument ........................................11
Connecting the Probe to the Test Circuit................................................11
Operation with a Teledyne LeCroy Oscilloscope.....................................12
Smart Offset ............................................................................................12
Bandwidth Limit (ADP305 only) ..............................................................12
Auto Zero.................................................................................................12
Remote Control Commands ................................................................... 13
Command List..........................................................................................13
Probe Auto Zero ......................................................................................14
Probe Bandwidth Limit............................................................................14
Probe Coupling........................................................................................15
Probe Offset ............................................................................................16
Probe Volts/div........................................................................................17
Maintenance ......................................................................................... 18
Calibration Interval..................................................................................18
Service Strategy.......................................................................................18
Troubleshooting ......................................................................................18
Returning a Defective Probe ...................................................................19
Replacement Parts ..................................................................................20
Functional Test ...................................................................................... 21
Performance Verification ....................................................................... 22
Reference Information........................................................................... 27
Differential Mode and Common Mode...................................................27
Differential Mode Range and Common Mode Range.............................
27
Common Mode Rejection Ratio..............................................................27
Certifications ...........................................................................................28
Contact Teledyne LeCroy ........................................................................32

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 ADP30x probe body or probe acccessories or
in this manual to alert you to important safety considerations.
WARNING. High Voltage, risk of electric shock.
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
PROTECTIVE (EARTH) TERMINAL
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ADP30x Probe
Precautions
To avoid personal injury or damage to property, review and comply with the
following safety precautions.
Use product only as specified.
Do not overload. To avoid electric shock or fire hazard, do not apply any
potential that exceeds the maximum rating of the probe and/or the probe
accessory, whichever is less.
Connect and disconnect properly. To avoid electric shock or fire hazard, always
make the connections from the probe input leads to the probe accessory that
you intend to use before making any connections to a voltage source.Do not
connect or disconnect accessories to a votage source unless they are first
connected to the probe input leads.
Use only accessories compatible with the probe. Use only accessories that are
rated for the application. Substituting other accessories may create a potential
shock or burn hazard. Ensure connections between probe input leads and probe
accessories are secure before connecting them to a voltage source.
Comply with voltage derating curve. When measuring higher frequency signals,
comply with the Voltage vs. Frequency Derating Curve (see Page 6).
Observe all terminal ratings. To avoid electric shock or fire, do not use the
probe above the input limits shown on the probe as well as all accessories.
Do not remove probe casing. Removing the probe’s case or touching exposed
connections may result in electric shock.
Use only within operational environment listed. Do not use in wet or explosive
atmospheres. Keep product surfaces clean and dry.
Handle with care. Probe accessory tips are sharp. They can puncture skin or
cause other bodily injury if not handled properly.
Keep fingers behind the finger guard of the probe accessories.
Do not operate with suspected failures. Before each use, inspect the probe and
accessories for any 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 ADP30x family of high voltage active differential probes is safe, easy-to-use,
and ideally suited for power measurements.
The 20 MHz ADP300 is perfect for troubleshooting low frequency power circuits,
and other circuits where the reference potential is elevated from ground or the
location of ground is unknown.
The 100 MHz ADP305 is designed for measuring high-speed floating voltages
found in today’s power electronics, like switching power supplies.
With the ProBus interface, the ADP30x becomes an integral part of the
oscilloscope. For the ADP305, the attenuation, offset, and bandwidth limit are all
controlled from the oscilloscope’s front panel or by means of remote control
commands. This means that the complete measurement setup can be saved and
recalled by the oscilloscope and all measurement values will be correct. The
oscilloscope provides power to the probe, so there is no need to worry about a
separate power supply or changing batteries.
The sensitivity of the ADP300 ranges from 1 V/div to 350 V/div; and the
sensitivity for the ADP305 ranges from 200 mV/div to 350 V/div.
Attenuation is automatically selected by the oscilloscope to either ÷100 or
÷1000.
Key Benefits
•True Differential Measurements
•EN 61010-031 1000 V CAT III Safety Compliance (when used with
correspondingly rated probe accessories)
•ProBus Interface with Automatic Scaling
•Auto-Zeroing
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ADP30x Probe
Specifications
Nominal Characteristics
Nominal characteristics describe parameters and attributes that are guaranteed
by design, but do not have associated tolerances.
Sensitivity:
ADP300 1 V/div to 350 V/div
ADP305 200 mV/div to 350 V/div
Input Configuration True Differential, + and – inputs
Maximum Input Voltage 1000 V rms, either input to
ground, CAT III.
1400 Vp, between inputs
Output Configuration Single ended, Ground referenced
Intended Output Load 1 MΩ
Output Connector ProBus
Input Attenuation ÷100 or ÷1000
Bandwidth Limit Filter 20 MHz
(ADP305 only)
Interface ProBus
Oscilloscope Compatibility Teledyne LeCroy LT or LC series
oscilloscopes with firmware version 8.5 or
higher; or X-Stream oscilloscopes.
(Not available for 9300 series oscilloscopes)
Warranted Characteristics
Warranted characteristics are parameters with guaranteed performance. Unless
otherwise noted, tests are provided in the "Performance Verification Procedure"
for all warranted specifications.
Low Frequency Accuracy ±1% of reading (÷1000 Atten)
(probe only) ±2% of reading (÷100 Atten)
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Operator’s Manual
Typical Characteristics
Typical characteristics are parameters with no guaranteed performance. Tests
for typical characteristics are not provided in the "Performance Verification
Procedure."
Bandwidth:
ADP300 20 MHz
ADP305 100 MHz
Rise Time:
ADP300 < 17.5 ns
ADP305 < 3.5 ns
Slew Rate, referenced to input:
ADP300 60 000 V/µs
ADP305 300 000 V/µs
AC Noise < 50 mV rms
Common Mode Rejection:
50 Hz / 60 Hz 80 dB (10 000:1)
100 kHz 50 dB (300:1)
Input Impedance 4 MΩ || 8 pF either input to ground
Propagation Delay 20 ns
Environmental Characteristics
Temperature, operating 0 °C to 50 °C (32 to 122 °F)
Usage Indoor
Relative Humidity 80% max. up to 31 °C, decreasing linearly to
40% max. at 50 °C
Altitude 3000 m (9842 ft) max. at 25 °C
Physical Characteristics
Weight 300 g
Overall Length 2 m
Input Lead Length 40 cm
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ADP30x Probe
Voltage vs Frequency Derating Curve
Input Voltage and Burn Limit vs. Frequency
NOTE: The voltage derating curve provides the maximum voltage that can be
applied to the probe inputs without risking damage to the probe.
The Burn Limit is the voltage limit that should be used when the input leads
are being hand-held. This limit is derived using the methodology described in
EN 61010-031 section 6.3.1.2.
WARNING. To avoid risk of electric shock or burn, comply with the burn
limits of the voltage vs. frequency derating curve when measuring high-
frequency signals with hand-held accessories.
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Operator’s Manual
Typical CMRR vs. Frequency
Standard Accessories
The following accessories are included with each probe model:
ADP300 ADP305
Instruction Manual x x
Certification of Compliance x x
Hook and Loop Strap for holding probe x x
Plunger Hook Tip x x
Safety Alligator Clip x
Plunger Jaw Clip x
Plunger Clamp Clip x
Spade Terminal x
Soft Accessory Case x
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ADP30x Probe
Voltage Derating for ADP30x Standard Accessories
Accessory (Teledyne LeCroy P/N)
Combined Probe and Accessory
Max Input Voltage (from either input to
ground)
Plunger Hook Clips (PK30X-1) 1000V CAT II (600V CAT III)
Safety Alligator Clips (PK30X-2) 1000V CAT III
Plunger Jaw Clips (PK30X-3) 1000V CAT II (600V CAT III)
Plunger Clamp Clips (PK30X-4) 1000V CAT III
Safety Spade Terminals (PK30X-5) 1000V CAT II (600V CAT III)
NOTE: The operating altitude of ADP30x is derated to 2000 m (6560 ft) when
used with these accessories. The voltage rating and CAT rating are de-rated to
the voltage in the above table when used with these accessories.
WARNING.To avoid risk of electric shock or fire, do not exceed either
the voltage rating or category rating of the probe or the probe
accessory, whichever is the lesser of the two.
WARNING.To avoid risk of electric shock when using the probe or
accessories, keep your fingers behind the finger guard of the probe.
Keep the output cable away from the circuits being measured. Use only the
specified accessories.
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Operator’s Manual
Description of Accessories
Plunger Hook Clip (1 Red, 1 Blue)
Insulated, 1000 V, CAT II. Designed to attach to
wire leaded
parts, the overall length is
158 mm
(6.22
inches), and the hook extends 8 mm (0.31
inch) when the plunger is fully pressed.
Safety Alligator Clip (1 Red, 1 Blue)
Insulated, 1000 V, CAT III. Designed to attach to
large comp
onents, such as busbars and large
bolts, the overall length
is 90 mm (3.54 inches)
and the jaw opens to 22 mm (0.87 inch) max.
Plunger Jaw Clip (1 Red, 1 Blue)
Insulated, 1000 V, CAT II. The clip is designed to
securely grasp thick wires, cables, groun
d
leads, rails, and even screw
heads. The overall
length is 1
75 mm (6.89 inches). The steel jaw
extends
12 mm (0.48 inch) and opens to 25
mm
(
1 inch).
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ADP30x Probe
Plunger Clamp Clip (1 Red, 1 Blue)
Insulated, 1000 V, CAT III. Designed for
attaching to hard
-to-reach test points, the
entire body is fully insu
lated. The overall
l
ength is 160 mm (6.3
inch). The clamp can grab
leads, pins and wires up to 5 mm (0.2 inch) in
diameter.
Spade Terminal
Insulated, 1000 V, CAT II. Designed to connect
to terminal strips, po
sts, and screws, the
overall length is 6
5 mm (2.55 inch).
WARNING. To avoid injury or death due
to electric shock, do not connect or
disconnect probe input leads to the Spade
Terminals while they are connected to a
voltage source.
Spade Terminals must not be
used as hand
-held accessories; they are meant
to be used as a permanent installation in a test
set up.
Soft Accessory Case
This can be used to carry probes and accessories. It can also be mounted on your
oscilloscope for storing all your accessories and manuals. See Appendix B for
installation instructions.
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Operator’s Manual
Operation
Connecting the Probe to the Test Instrument
The ADP30x series of probes has been designed for use with Teledyne LeCroy
oscilloscopes equipped with the ProBus interface. When you attach the probe
output connector to the scope’s input connector, the scope will recognize the
probe, set the scope input termination to 1 MΩ, and activate the probe control
functions in the user interface.
Connecting the Probe to the Test Circuit
The ADP30x series of probes is ideally suited for applications where no ground is
available or where the location of a ground connection is unknown.
Two inputs are available at the probe tip to connect the probe to a circuit under
test. For accurate measurements, the +and – inputs both must always be
connected to the test circuit. Positive voltages applied to the +input (red)
relative to the – input (blue) will deflect the oscilloscope trace toward the top of
the screen.
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 may slow the rise time of fast signals. Input leads that form
a large loop area will pick up any radiated electromagnetic field that passes
through the loop and may induce noise into the probe inputs. Because this signal
will appear as a differential mode signal, the probe’s common mode rejection
will not remove it. This effect can be greatly reduced by twisting the input leads
together to minimize the loop area.
High common mode rejection requires precise matching of the relative gain or
attenuation in the + and – input signal paths. Mismatches in additional parasitic
capacitance, inductance, delay, and a source impedance difference between the
+and – signals will lower the common mode rejection ratio. Therefore, it is
desirable to use the same length and type of wire and connectors for both input
connections. When possible, try to connect the inputs to points in the circuit
with approximately the same source impedance.
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ADP30x Probe
Operation with a Teledyne LeCroy Oscilloscope
When the ADP30x is connected to a Teledyne LeCroy oscilloscope, the displayed
scale factor and measurement values will be adjusted to account for the
effective gain of the probe.
Through the oscilloscope software, the probe’s internal attenuation and offset
can be conveniently controlled through the oscilloscope’s user interface.
Turning the VOLTS/DIV knob will control the oscilloscope’s scale factor and the
probe’s internal attenuation to give full available dynamic range from 1 V/div to
350 V/div for the ADP300, and from 200 mV/div to 350 V/div for the ADP305.
Some of the transition of the scale factor will result in a change of attenuation.
Smart Offset
The ADP30x has offset capability. This allows you to remove a DC bias voltage
from the differential input signal while maintaining DC coupling.
The offset range of the probe is a function of the oscilloscope’s sensitivity and
the probe’s attenuation. This ensures that the probe will never be overdriven on
screen. In addition, it will prevent the oscilloscope from being overdriven and
getting inaccurate measurements.
Bandwidth Limit (ADP305 only)
To comply with various test standards used for quantifying output noise of
power supplies, the ADP305 is capable of switching the bandwidth limit from Off
(maximum bandwidth) to 20 MHz in the channel Vertical Adjust dialog.
Auto Zero
The ADP30x incorporates an Auto Zero function to remove the DC offset from
the Differential Amplifier’s output. Auto Zero must be invoked by the user. You
may do this even while the probe is connected to a live circuit.
After several minutes of warm-up, or when the probe is exposed to a large shift
in ambient temperature, some DC offset drift may occur from thermal effects in
the amplifier. To initiate an Auto Zero cycle, select "AUTO ZERO" in the
oscilloscope’s user interface. During an Auto Zero cycle the oscilloscope will
automatically disconnect the ADP30x inputs from the circuit under test, perform
the auto zero function, and reconnect the inputs.
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Operator’s Manual
Remote Control Commands
When attached to a Teledyne LeCroy oscilloscope equipped with ProBus
interface, the ADP30x Active Differential Probe can be remotely controlled,
along with the other oscilloscope functions. The control interface can be either
the RS-232 or IEE-488 (GPIB) buses. The commands that control the probe are
described below. The text for the command description is formatted in a style
consistent with the oscilloscope command description contained in the Teledyne
LeCroy Digital Oscilloscopes Remote Control Manual supplied with the
oscilloscope. Please refer to this manual for additional information on the
remote control buses and the conventions used in the command descriptions.
The commands begin with the "PRx:" prefix, where "x" is the channel that the
ADP30x is connected to. These commands are similar to the channel commands
that use the prefix "Cx:". The difference is that the "PRx:" form refers to the
probe tip, whereas the "Cx:" form refers to the oscilloscope input connector.
For example, "PRx:VDIV" sets the Volts per division at the probe tip, while
"Cx:VDIV" sets the Volts per division at the BNC input connector, without
factoring the gain or attenuation factor of ADP30x probe. The "PRx:" form of
these commands are only active when the ADP30x probe is connected to the
selected channel. An error will result when an ADP30x specific command is sent
to the oscilloscope without a differential probe connected to the selected
channel.
Command List
PRx:AUTOZERO Initiates an auto zero cycle in the probe.
PRx:BWL Selects the probe upper bandwidth limit.
PRx:COUPLING Selects the input coupling of the probe.
PRx:OFFSET Selects the probe offset voltage.
PRx:VDIV Selects the vertical scale factor of the
probe/oscilloscope system.
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ADP30x Probe
Probe Auto Zero PRx:AUTOZERO, PRx:AZ
Command
Description
The PRx:AUTOZERO
command initiates an auto zero cycle in the
ADP30x
probe to remove any offset drift. The probe input can
remain connected to the test circuit during the auto zero cycle
.
Command Syntax
<channel>:AutoZero
<channel>:= {PR1, PR2, PR3, PR4}
Example
The following command initiates an auto zero in the ADP30x
Differential Probe a
ttached to channel 1:
CMD$="PR1:AZ":CALL IBWRT(SCOPE%,CMD$)
Probe Bandwidth Limit PRx:BANDWIDTH_LIMIT, PRx:BWL
Command/Query
Description
The PRx:BANDWIDTH_LIMIT
command sets the upper (HF) –3
dB bandwidth limit of the ADP305 probe. The arguments are in Hz
.
The
PRx:Bandwidth_Limit
query returns the upper bandwidth
limit setting for the differential probe connected to the specified
channel.
Command
Syntax
<channel>:BWL<upper bandwidth>
<channel>:={PR1, PR2, PR3, PR4}
<upper bandwidth>:={OFF, 20M}
Query
Syntax
<channel>:BWL?
Response Format
<channel>:BWL <upper bandwidth>
Example
The following command sets the upper bandwidth of the ADP305
connected to channel 1 to 20 MHz.
CMD$="PR1:BWL 20M": CALL IBWRT(SCOPE%,CMD$)
NOTE: The PRx:Bandwidth_Limit command is not available with model ADP300.
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Operator’s Manual
Probe Coupling PRx:COUPLING, PRx:CPL
Command/query
Description
The
PRx:COUPLING command selects the coupling mode of the
ADP30x
probe.
The
PRx:COUPLING? query returns the coupling mode of the
selected channel.
Comma
nd
Syntax
<channel>:CouPLing<coupling> <channel>:={PR1,
PR2, PR3, PR4} <coupling>:={DC, GND}
Query Syntax
<channel>:CouPLing?
Response
Format
<channel>:CPL <coupling>
Example
The following command sets the coupling to DC in the
ADP30x
differential probe
connected to channel 2.
CMD$=:PR2:CPL DC": CALL
IBWRT(SCOPE%,CMD$)
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ADP30x Probe
Probe Offset PRx:OFFSET, PRx:OFST
Command/Query
Description
When an ADP30x probe is connected to a channel, the OFFSET
command sets the probe offset value.
The maximum range and resol
ution is determined by the V/DIV
setting. If an out
-of-range value is entered, the differential probe will
set the offset to the closest valid value, and the VAB bit (bit 2) in the
STB register will be set
.
The OFFSET? query returns the offset voltage of
the differential
probe connected to the specified channel
.
Command Syntax
<channel>: OFfSeT<offset>
<ch
annel>:={PR1, PR2, PR3, PR4}
ADP305:
<offset>={-40V to +40V} for 200-499 mV/div(LC series)
={
-100V to +100V} for 200 -499 mV/div (LT series)
={
-100V to +100V} for 500 mV/div to 9.9 V/div
={
-1000V to +1000V} for 10V/div to 99 V/div
={
-(1400V-4(V/Div setting)) to (1400V-4(V/Div
setting))} for 100 V/div to 350 V/div
ADP300:
<offset>
={-100V to +100V} for 1-9.9 V/div
={
-1000V to +1000V} for 10 -99 V/div
=
{-(1400V-4(V/Div setting))to(1400V-4(V/Div
setting))} for 100 V/div to 350 V/div
Query Syntax
<channel>:OFfSeT?
Response Format
<channel>:OFST <offset>
Example
The following command sets the offset at the probe tip of the
ADP30x
differential probe connected to 1 to 5 volts:
CMD$="PR1:OFST 5": CALL IBWRT(SCOPE%,CMD$)
NOTE The suffix V is optional
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