Tektronix P7520A User manual
x
P7520A
TriMode™ Probe
ZZZ
Instruction Manual
*P071304800*
071-3048-00
xx
P7520A
TriMode™ Probe
ZZZ
Instruction Manual
www.tektronix.com
071-3048-00
Copyright © Tektronix. All rights reserved. Licensed software products are owned by Tektronix or its subsidiaries or suppliers, and are
protected by na
tional copyright laws and international treaty provisions.
Tektronix pro
previously published material. Specifications and price change privileges reserved.
TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.
EZ-Probe is a registered trademark of Cascade Microtech, Inc.
TriMode is a trademark of Tektronix, Inc.
ducts are covered by U.S. and foreign patents, issued and pending. Information in this publication supersedes that in all
Contacting Tektronix
Tektronix, Inc.
14150 SW Karl Braun Drive
P.O. Box 500
Beaverton, OR 97077
USA
For product information, sales, service, and technical support:
In North America, call 1-800-833-9200.
Worldwide, visit www.tektronix.com to find contacts in your area.
Warranty
Tektronix warrants that this product will be free from defects in materials and workmanship for a period of one (1) year from the date of
shipment. If any such product proves defective during this warranty period, Tektronix, at its option, either will repair the defective
product without charge for parts and labor, or will provide a replacement in exchange for the defective product. Parts, modules and
replacement products used by Tektronix for warranty work may be new or reconditioned to like new performance. All replaced
parts, modules and products become the property of Tektronix.
In order to obtain service under this warranty, Customer must notify Tektronix of the defect before the expiration of the warranty period
and make suitable arrangements for the performance of service. Customer shall be responsible for packaging and shipping the
defective product to the service center designated by Tektronix, with shipping charges prepaid. Tektronix shall pay for the return of the
product to Customer if the shipment is to a location within the country in which the Tektronix service center is located. Customer shall
be responsible for paying all shipping charges, duties, taxes, and any other charges for products returned to any other locations.
This warranty shall not apply to any defect, failure or damage caused by improper use or improper or inadequate maintenance and
care. Tektronix shall not be obligated to furnish service under this warranty a) to repair damage resulting from a ttempts by personnel
other than Tektronix representatives to install, repair or service the product; b) to repair damage resulting from improper use or
connection to incompatible equipment; c) to repair any damage or malfunction caused by the use of non-Tektronix supplies; or
d) to service a product that has been modified or integrated with other products when the effect of such modification or integration
increases the time or difficulty of servicing the product.
THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THE PRODUCT IN LIEU OF ANY OTHER WARRANTIES,
EXPRESS OR IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR PURPOSE. TEKTRONIX' RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS
IS THE SOLE AND E XCLU S IVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY. TEKTRONIX
AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH
DAMAGES.
[W2 – 15AUG04]
Table of Contents
General safety summary .. . . ... . ... . . ... . ... . . ... . . .. . . ... . . .. . . ... . . ... . ... . . ... . . .. . . ... . . ... . ... . . ... . . .. . . ... . . ... . ... . . ... . ... . .. iii
Environmental Considerations ........................................................................................................ v
Preface................................................................................................................................. vi
Documentation ...................................................................................................................vi
Key Features........................................................................................................................... 1
Operating Considerations ............................................................................................................. 2
Installation.............................................................................................................................. 3
Connecting to the Host Instrument ... . ... . . ... . ... . . ... . ... . . ... . ... . . ... . . .. . . ... . . .. . . ... . . .. . . ... . . .. . . ... . . .. . . ... . . ... . ... . 3
Connecting Accessories to the Probe Body . .. . . ... . . .. . . ... . . .. . . ... . . .. . . ... . . .. . . ... . . .. . . ... . . .. . . ... . . .. . . ... . . .. . . ... . . .. 5
Control Box Controls and Indicators............................................................................................. 6
Connecting to Your Circuit ... . ... . . ... . ... . . ... . ... . . ... . ... . . ... . ... . . .. . . ... . . .. . . ... . . .. . . ... . . .. . . ... . . .. . . ... . ... . . ... . ... . . 8
Functional Check and Calibr
Functional Check. . ... . . ... . ... . . ... . . .. . . ... . . ... . ... . . ... . . .. . . ... . . ... . . .. . . ... . . ... . ... . . ... . ... . . ... . . .. . . ... . . ... . ... . . ... . .9
TriMode Probe Calibration ...................................................................................................... 12
Basic Operation....................................................................................................................... 16
Maximizing P7520A Signal Bandwidth .. . ... . . ... . ... . . ... . . .. . . ... . . ... . ... . . ... . . .. . . ... . . ... . . .. . . ... . . ... . ... . . ... . ... . . ... 16
Connecting to a Circuit Board .. . ... . . .. . . ... . . .. . . ... . ... . . .. . . ... . . .. . . ... . ... . . .. . . ... . . .. . . ... . ... . . ... . ... . . ... . ... . . .. . . .. 17
Connecting the Probe to Instruments without a TekConnect Interface . . . .. . . ... . . .. . . ... . . .. . . ... . . ... . ... . . ... . ... . . ... . ... 26
Accessories and Options............................................................................................................. 27
Standard Accessories. . ... . ... . . ... . ... . . ... . ... . . ... . . .. . . ... . . ... . ... . . ... . . .. . . ... . . ... . ... . . ... . . .. . . ... . . .. . . ... . . ... . ... . . 27
Optional Accessories .. . ... . . ... . ... . . ... . ... . . ... . ... . . ... . ... . . ... . ... . . ... . ... . . .. . . ... . . .. . . ... . . .. . . ... . . .. . . ... . . .. . . ... . . 30
Options .......................................................................................................................... 34
Theory of Operation ... . ... . . ... . ... . . ... . ... . . ... . ... . . ... . ... . . ... . . .. . . ... . . .. . . ... . . ... . ... . . ... . . .. . . ... . . .. . . ... . . .. . . ... . . ..... 35
Attenuation and Input Mode Settings. .. . . ... . . .. . . ... . . .. . . ... . . ... . ... . . ... . ... . . ... . ... . . ... . ... . . ... . ... . . ... . ... . . ... . ... . . 35
Input Voltage Limits .. . . ... . . .. . . ... . . .. . . ... . ... . . ... . ... . . ... . ... . . ... . ... . . ... . ... . . ... . ... . . ... . ... . . ... . ... . . ... . ... . . .. . . .. 37
TriMode Operation .............................................................................................................. 40
Probing Techniques to Maximize Signal Fidelity. . ... . . ... . ... . . ... . ... . . ... . ... . . ... . ... . . ... . ... . . ... . ... . . ... . . .. . . ... . . .. . . 42
Input Impedance and Probe Loading. ... . ... . . ... . . .. . . ... . . ... . . .. . . ... . . ... . . .. . . ... . . ... . ... . . ... . . .. . . ... . . ... . ... . . ... . . .. 49
Specifications.........................................................................................................................51
Warranted Characteristics ...................................................................................................... 51
Typical Characteristics..........................................................................................................52
Nominal Characteristics......................................................................................................... 55
Tip Specifications ............................................................................................................... 56
Service ................................................................................................................................ 70
Host Instrument Firmware ...................................................................................................... 70
Error C onditions . . ... . . .. . . ... . . .. . . ... . . .. . . ... . . ... . ... . . ... . ... . . ... . . .. . . ... . . .. . . ... . . .. . . ... . . .. . . ... . . .. . . ... . . .. . . ... . . ..70
Replaceable Parts.. . . .. . . ... . . .. . . ... . . .. . . ... . . .. . . ... . . .. . . ... . . .. . . ... . . .. . . ... . . .. . . ... . . .. . . ... . . .. . . ... . . .. . . ... . . .. . . ... . 72
Handling the Probe.............................................................................................................. 86
Cleaning the Probe.. . . ... . . .. . . ... . . .. . . ... . . ... . . .. . . ... . . .. . . ... . . ... . ... . . ... . ... . . ... . ... . . ... . . .. . . ... . . ... . ... . . ... . . .. . . . 87
Returning the Probe forServicing.............................................................................................. 88
Index
ation..................................................................................................... 9
Table of Content
s
P7520A Probe Instruction M anual i
Table of Content
s
ii P7520A Probe Instruction M anual
General safety s
ummary
General safet
Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it.
To avoid potential hazards, use this product only as specified.
Only qualified personnel should perform service procedures.
To avoid fire or personal injury
Connect and disconnect properly. Connect the probe output to the measurement instrument before connecting the
probe to the circuit under test. Connect the probe reference l ead to the circuit under test before connecting the probe
input. Dis
from the measurement instrument.
Observe all terminal ratings. To avoid fire or shock hazard, observe all ratings and markings on the product. Consult the
product manual for further ratings information before making connections to the product.
Do not apply a potential to any terminal, including the common terminal, that exceeds the maximum rating of that terminal.
Do not operate without covers. Do not operate this product with covers or panels removed.
Do not operate with suspected failures. If you suspect that there is damage to this product, have it inspected by
qualifie
Avoid ex
connect the probe input and the probe reference lead from the circuit under test before disconnecting the probe
d service personnel.
posed circuitry.
y summary
Do not touch exposed connections and components when power is present.
Do not operate in wet/damp conditions.
Do not operate in an explosive a tmosphere.
Keep product surfaces clean and dry.
P7520A Probe Instruction M anual iii
General safety s
Termsinthismanual
These terms may appear in this manual:
WARNING. Warning statements identify conditions or practices that could result in injury or loss of life.
CAUTION. Caution statements identify conditions or practices that could result in damage to this product or other property.
Symbols and terms on the product
These terms may appear on the product:
DANGER indicates an injury hazard immediately accessible as you read the marking.
WARNING indicates a n injury hazard not immediately accessible as you read the marking.
CAUTION indicates a hazard to property including the product.
The following symbol(s) may appear on the product:
ummary
iv P7520A Probe Instruction M anual
Environmental C
onsiderations
Environmenta
This section provides information about the environmental impact of the product.
Product End-of-Life Handling
Observe the following guidelines when recycling an instrument or component:
Equipment Recycling. Production of this equipment required the extraction and use of natural resources. The
equipment may contain substances that could be harmful to the environment or human health if improperly handled at the
product’s end of life. In order to avoid release of such substances into the environment and to reduce the use of natural
resources, we encourage you to recycle this product in an appropriate system that will ensure that most of the materials are
reused or recycled appropriately.
The symbol shown below indicates that this product complies with the European Union’s requirements according to Directive
2002/96/EC on waste electrical and electronic equipment (WEEE). For information about recycling options, check the
Support/Service section of the Tektronix Web site (www.tektronix.com).
l Considerations
ction of hazardous substances
Restri
This product is classi fi ed as an industrial monitoring and control instrument accessory, and is not required to comply with the
substance restrictions of the recast R oHS Directive 2011/65/EU until July 22, 2017.
P7520A Probe Instruction M anual v
Preface
Preface
This manual describes the installation and operation of the P7520A TriMode Probe. Basic probe concepts, specifications,
and maintenance procedures are included in this manual. You can also access the Tektronix Web site for this manual
(www.tektronix.com/manuals).
Documentation
To read about Use these documents
Installation and operation
Specifications Read the Specifications section in this manual.
Reordering accessories
Read this instruction manual for information about how to use your probe.
Use the Accessories and Options section or refer to the insert in your
accessory kit when reordering accessories.
vi P7520A Probe Instruction Manual
Key Features
The P7520A TriMode Probe allows you to take differential, single-ended, and common mode measurements with one probe
connection. Key features include:
Revolutionary TriMode operation
TekConnect interface
Bandwidth (typical)
>25 GHz in A – B mode with optional
P75PST solder tip @ 100 GS/s
>20 GHz in A – B mode with standard
P75TLRST solder tip
Rise time (10-90%)
<20psinA–Bmodewithoptional
P75PST solder tip @ 100 GS/s
<27 ps in A – B mode with standard
P75TLRST s older tip
(<29 ps in other modes)
Key Features
100 kΩ differential input resistance,
50 kΩ per side
P7520A Probe Instruction M anual 1
Operating Consi
derations
Operating Con
Table 1: P7520A TriMode Probe Characteristics
Characteristic Description Specification
Input voltage Dynamic range
Temperature
Humidity
Pollution
degree
CAUTION. To avoid ESD damage to the probe, always use an antistatic wrist strap ( provided with your probe), and work at a
static-approved workstation when you handle the probe.
siderations
Input voltage range
(DC + peak AC, both ranges;
input referenced to ground)
Operating
Nonoperating
Operating
Nonoperating
±0.625 V (5X)
±1.60 V (12.5X)
+3.7 V, –2.0 V
0to+40°C(+32°Fto+104°F)
-20°Cto+71°C(-4°Fto+160°F)
Up to +40 °C (+104 °F) 20%-80% RH
+30 °C to +46 °C (+86 °F to +115 °F) 0-90% RH
2, Indoor use only
2 P7520A Probe Instruction Manual
Installation
The P7520A probe is capable of measuring signals in excess of 25 GHz bandwidth. However, maximum performance is
only available when the probe is used with a P75PST probe tip and an oscilloscope with the TekConnect interface and at
least 25 GHz bandwidth.
NOTE. Your TekConnect instrument may require a firmware upgrade to support full functionality of the P7520A probe.
Before you connect the probe, check the version requirements. (See page 70, Host Instrument Firmware.)
When the probe is connected to compatible ≥25 GHz bandwidth oscilloscopes, probe characteristic data is transferred to
the oscilloscope and is stored for future use on all channels. The data transfer time typically takes a few minutes, and is
only done the first time the connection is made. Oscilloscopes with bandwidths lower than 25 GHz will not transfer the
data, and the system bandwidth will be limited.
Connecting to the Host Instrument
1. Slide the probe into the TekConnect
receptacle. The probe clicks into place
when fully engaged.
Installation
2. Turn the thumbscrew clockwise
(finger-tight only) to secure the probe to
the instrument.
CAUTION. Do not tighten the thumbscrew
beyond finger-tight. Over-torquing can result
in performance degradation.
3. To disconnect, turn the thumbscrew
counter-clockwise.
4. Press the latch release button and pull
the probe away from the instrument.
P7520A Probe Instruction M anual 3
Installation
Probe Power-On
After the initial connection to the
oscilloscope is made:
1. The probe briefly lights all LEDs during
a self-test, and then one Range and one
Mode LED remain lit.
2. If applicable, the probe transfers data
to the host instrument, and a message
displays on the instrument as the transfer
occurs.
3. The data transfer takes a few minutes,
and is only done when the host
instrument discovers a new probe. The
data transfer only occurs on instruments
that are fully compatible with the probe.
4. The host instrument displays the Probe
Tip Selection screen. The default
selection is Other Tip (no DSP).
5. Select the tip you are using and click OK.
The tip selection that you make here is
retained until you change it. The Probe
Tip Selection screen does not appear
again at power-on; you must access it
through the Probe Setup screen. (See
Figure 1 on page 6.)
4 P7520A Probe Instruction Manual
Connecting Accessories to the Probe Body
Installation
CAUTION. The p
when it is disconnected. To prevent damage to the probe, before you connect accessories to the probe body, always
check that the contacts are located in the probe body only.
The probe body and tip cable ends are keyed
to ensure correct installation. Connect them
as follows:
1. Orient the p
inputs on top, as shown.
2. Align the tip cable lead with the red band
to the A input.
3. Grasp the
push the cable into the probe body until
you feel a click. The cable housing is
fully sea
of the probe body.
4. To remove the tip, pull the cable tab
straight out from the probe body.
robe has replaceable contacts inside the probe body connector that may stick to the accessory connector
robe body with the A and B
cable connector by hand and
ted when it is flush with the edge
CAUTION
removing the tip. You may damage the tip or
probe if you pull on the cables.
. Pull only on the cable tab when
P7520A Probe Instruction M anual 5
Installation
Control Box Controls and Indicators
Atten. Button
After the probe is connected, the host
instrument automatically selects the
attenuation (voltage range) of the probe,
depending on the instrument volts/div setting.
You must change the attenuation autoselect
feature on the instrument to enable the
Atten. button on the probe:
1. In the oscilloscope menu bar, select
Vertical and then select Probe Setup.
2. From the Probe Setup or Probe Controls
screen, change the Range selection
from Auto to Manual. (See Figure 1
on page 6.) You can also change the
attenuation setting from these screens.
3. With the instrument in Manual Range
mode, press the Atten. button on
the probe to toggle the attenuation
setting between 5X and 12.5X. The
corresponding LED lights to indicate the
selected attenuation.
and LEDs
re 1: Probe Setup and Probe Controls screens
Figu
6 P7520A Probe Instruction Manual
Input Mode Button and LEDs
Press the Input Mode button to s elect one of
the four TriMode measurements. The modes
cycle in the following sequence:
A – B (for differential signal
measurement)
A – GND (for A input single-ended
measurement)
B – GND (for B input single-ended
measurement)
(A + B)/2 – GND (for common mode
measurement)
NOTE. Some oscilloscope models only
allow the A – B Input Mode to be selected,
depending on which input tip is selected in
the oscilloscope Probe Setup screen. (See
page 71, Input Mode/Probe Tip Selection.)
Installation
The following pages discuss characteristics
of the TriMode measurements.
TriMode Probing
The TriMode feature allows you to view
two sing
differential waveform and common-mode
voltage without moving the probe connection.
Press t
the waveform views.
This example shows a typical HDMI signal
(one h
The resultant differential waveform and
common-mode voltage are shown.
le-ended signals and the resultant
he Input Mode button to cycle through
alf-lane) on the A and B inputs.
P7520A Probe Instruction M anual 7
Installation
Connecting to Your Circuit
Before you connect these tips to your probe, we recommend that you perform a functional test and probe calibration.
(See page 9, Functional Check and Calibration.) Procedures for attaching the probe tips are described in Basic Operation.
(See page 16, Basic Operation.)
Use the P75TLRST Long Reach Solder Tip
to connect the probe to your circuit. The
P75TLRST Long Reach Solder Tip provides
a soldered, multi-point connection (A, B, and
GND). The P75TLRST tip is shipped with
the probe.
Use the optional P75P ST Performance
Solder Tip to get full bandwidth (>25 GHz)
measurements from the probe.
These tips provide full TriMode capabilities,
which are described in Basic Operation.
(See page 36, Input Mode Selection.)
Other tips are available and are described
later. (See page 30, Optional Accessories.)
The optional P75PDPM Precision Differential
Probing Module allows handheld and
fixtured probing of your circuit. The small,
precision-tapered tips and adjustable-width
tip spacing accommodate a variety of testing
needs.
The P75PDPM Probing Module is designed
for differential m easurements, and does not
incorporate a ground connection to your
circuit. However, you can make single-ended
measurements in the TriMode A – B mode by
connecting the B input to your circuit ground.
8 P7520A Probe Instruction Manual
Functional Chec
k and Calibration
Functional Ch
After you connect the probe to the oscilloscope, perform a functional check using the calibration board included with the probe.
CAUTION. To avoid ESD damage to the probe, always use an antistatic wrist strap (provided with your probe), and work at a
static-approved workstation when you handle the probe.
Functional Check
This procedure checks the four TriMode settings on the probe, using the PROBE COMPENSATION or FAST EDGE
connection on the f
remaining input modes are checked and compared to the differential mode measurement.
Table 2: Required E
Item Description Performance Requirement Recommended Example
Oscilloscope TekConnect Interface Tektronix DPO/DSA72504D
Test board
Coaxial cable SMA, 50Ω, male-to-male
Coaxial cable BNC, 50Ω, male-to-male
1
Nine-digit part numbers (xxx-xxxx-xx) are Tektronix part numbers
2
Standard acces
sory included with probe
eck and Calibration
ront panel of the oscilloscope. The A – B (differential mode) is set up and verified first, and then the
quipment
1
TriMode DC Calibration board
067-1821-xx
174-1120-xx
012-0208-xx
2
2
2
P7520A Probe Instruction M anual 9
Functional Chec
Test Setup
1. Connect the probe to any channel (1–4)
of the oscilloscope.
2. Set the oscilloscope to display the
channel.
3. Connect an SMA cable from the Probe
Compensation or FAST EDGE output
connector on the oscilloscope to the
SMA connector on the TriMode DC
Calibration board.
4. Set the two output switches on the
TriMode DC Calibration board to the
FAST RISE position.
5. Connect the probe to the cable on the
TriMode DC Calibration board (note
correct connector polarity).
k and Calibration
Test Procedure
6. Set the pr
the Input Mode to A – B.
7. Adjust the oscilloscope to display a
stable waveform (or press the Autoset
button)
NOTE. If you do not see a waveform, check
the connection at the probe body. (See
page 5, Co
Probe Body.)
8. When you see a stable square wave,
check t
cursors.) Signal output levels for some
oscilloscope models are listed below.
obe attenuation to 12.5X and
.
nnecting Accessories to the
he amplitude. (Use the horizontal
DPO/DSA72504D: 440 mV p-p
DPO/DSA73304D: 440 mV p-p
10 P7520A Probe Instruction M anual
9. Cycle the Input Mode button through the
remaining selections and compare the
displayed wav
that you measured in step 8.
A – B (the waveform from step 8)
A – GND (same amplitude and
polarity as measured in step 8)
B – GND (the B input is grounded; no
signal is mea
eforms to the waveform
sured)
Functional Chec
k and Calibration
(A+B)/2 – GN
the same polarity as measured in
step 8)
10. Set the probe attenuation to 5X and the
Input Mode
11. Repeat ste
attenuation setting.
D (half-amplitude, but
to A – B.
ps 7 through 9 for the 5X
P7520A Probe Instruction M anual 11
Functional Chec
k and Calibration
TriMode Probe Calibration
After you perform a functional check of the probe, run a probe calibration routine. We recommend that you repeat the probe
calibration for all four of the TriMode settings, and do this on each channel that you use.
The probe calibration operation minimizes measurement errors by optimizing the gain and offset of both probe attenuation
settings on each channel. Individual calibration constants are stored for each calibrated TriMode setting, on each probe, on
each channel.
CAUTION. To avoid ESD damage to the probe, always use an antistatic wrist strap ( provided with your probe), and work at a
static-approved workstation when you handle the probe.
You can use the equipment shown in the Functional Check to perform the probe calibration. (See Table 2 on page 9.)
12 P7520A Probe Instruction M anual
Check the Instrument Calibration
Status
The Calibration Status of the instrument
Signal Path Compensation test must be
Pass for the probe calibration routine to run.
1. From the Utilities menu, select Instrument
Calibration.
2. In the Calibration box, check that the
Status field is Pass.
3. If the status is not pass, disconnect all
probes and signal sources from the
oscilloscope, and run the Signal Path
Compensation routine.
When the S ignal Path compensation test
status is Pass, calibrate the probe. (See
page 13, Calibrate the Probe.)
Calibrate t he Probe
Functional Chec
k and Calibration
1. Connect the probe to any channel (1–4)
of the oscilloscope. Allow the probe to
warm up fo
2. Set the o
channel.
3. Connect a BNC cable from the Probe
Calibration output connector on the
oscill
the TriMode DC Calibration board.
NOTE. You may be able to use the PROBE
COMPEN
your oscilloscope manual or online Help for
more information.
4. Connect the probe to the cable on the
TriMode DC Calibration board.
5. Set the Input Mode to A – B on the probe.
r 20 minutes.
scilloscope to display the
oscope to the BNC connector on
SATION output connector. Check
P7520A Probe Instruction M anual 13
Functional Chec
6. Set the switches on the TriMode DC
Calibration board to the positions shown
for the select
Table 3.)
Table 3: TriMode DC Calibration board switch settings
k and Calibration
ed input mode. (See
Probe inpu
A–B
A
B
(A+B)/2 Probe Ca
tmode
Fast rise/
Probe Cal Gnd
Probe Cal Sig
Probe Ca
probe cal
l
l
Gnd/Sig
Sig
Sig
14 P7520A Probe Instruction M anual
Functional Chec
k and Calibration
7. In the menu bar,
select Probe Cal.
The Probe Setup screen appears. (Some
oscilloscope
calibration routine and switch automatically
between input modes.)
8. Select Compensate Probe.
The probe cal
the probe to the oscilloscope for both probe
attenuation settings. The displayed results
differ betwe
9. Oscillosco
NOTE. If the Probe Cal routine fails, check
the connec
page 5, Connecting Accessories to the
Probe Body.)
10. Oscilloscopes that support the automated
s support an automated TriMode
en oscilloscope models:
automated TriMode calibration routine
display Compensated in the Probe
Status box.
the remaining input mode settings.
tion at the probe body. (See
TriMode calibration routine will display
an on-screen prompt to toggle the probe
calibration fixture SIG/GND switch.
Follow the instructions to complete the
calibration for the remaining input modes.
select Vertical and then
ibration routine runs, optimizing
pes that do not support the
Repeat steps 5 through 8 for
11. After a successful Probe Cal,
Compensated appears in the Probe
Status box.
NOTE. If the Probe Cal routine fails, check
the connection at the probe body. (See
page 5, Connecting Accessories to the
Probe Body.)
P7520A Probe Instruction M anual 15
Basic Operation
Basic Operati
This section includes more information about using the probe controls on the control box and procedures for connecting
the probe to your circuit.
on
Maximizing P7520A Signal Bandwidth
The bandwidth of the P7520A probe can
be maximized to 25 GHz only when the
following conditions are met:
The host oscilloscope bandwidth must be
≥25 GHz and not be bandwidth limited.
The host oscilloscope sample rate must
be set to 100 GS/s. Slower sample rates
reduce the probe bandwidth.
The P7520A Input Mode must be set to
(A – B) mode. (Note: the bandwidth is
less for other input modes.)
A P75PST solder tip must be used for
the probe DUT connection.
The solder ramp that is supplied w ith the
probe is recommended as an aid to k eep
the probe tip wire connections as short
as possible (<0.032 in./0.8 mm).
16 P7520A Probe Instruction M anual
Connecting to a Circuit Board
The P75TLRST Long Reach Solder Tip is shipped with the probe. Use the P75TLRST tip to connect the probe to your circuit,
or use the optional P75PST TriMode Performance Solder Tip for ≥25 GHz bandwidth measurements. Other TriMode solder
tips are available, as well as a handheld probing module, described on the following pages.
P75TLRST TriMode Long Reach
Solder Tip (Standard)
P75PST TriMode Performance
Solder Tip (Optional)
The Long Reach and Performance
Solder tips enable you to make full signal
characterizations from a m ulti-point soldered
connection.
The soldered connection passes the two
complementary signals (the A signal and the
B signal), and a ground reference from your
circuit to the TriMode probe.
The P75PST tip is optimized for high-speed
performance. Maximum P7520A bandwidth
can only be achieved with the P75PST
tip and an oscilloscope with ≥25 GHz
bandwidth.
Basic Operation
TriMode Resistor Solder Tips
These are optional accessory tips that you
can order for your probe. The tips provide
solder connection points for the A and B
probe input signals at the resistor leads,
instead of on the solder tip board.
1. 020-2936-xx TriMode Resistor Solder
Tip – measures <29 ps rise times
2. 020-2944-xx TriMode Extended Resistor
Solder Tip – measures <32 ps rise times
The tip resistors can tolerate more solder
cycles than the P75TLRST tip board, and
can be replaced when necessary.
These tips provide full TriMode capabilities
when you use the soldered-ground
connection on the tip board.
CAUTION. The TriMode solder tips are
very small and must be handled carefully to
avoid damaging them. The following pages
describe the proper techniques for using the
tips.
P7520A Probe Instruction M anual 17
Basic Operation
The dimensions of the solder tip connections
are provided here for reference. You can
also design th
board layout for easier test connections.
To connect the probe tip to your circuit, use
the wire and so
wire replacement kit. The kit includes:
0.004 in (0.10 m m) wire
0.008 in (0.20 m m) wire
SAC305 solder (RoHS compliant)
You will also need tweezers, a low-wattage
soldering i
cutters.
Separate procedures follow for soldering the
different
e tip footprint into your circuit
lder that are provided in the
ron, and a pair of sharp wire
tips to your circuit.
18 P7520A Probe Instruction M anual
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