Tektronix P7350SMA User manual

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Instruction Manual
P7350SMA
5 GHz Differential Probe
071-1264-01
Warning
The servicing instructions are for use by qualified
personnel only. To avoid personal injury, do not
perform any servicing unless you are qualified to
do so. Refer to all safety summaries prior to
performing service.
www.tektronix.com

Copyright ©Tektronix, Inc. All rights reserved.
Tektronix products are covered by U.S. and foreign patents, issued and
pending. Information in this publication supercedes that in all previously
published material. Specifications and price change privileges reserved.
Tektronix, Inc., P.O. Box 500, Beaverton, OR 97077
TEKTRONIX, TEK, and TekConnect are registered trademarks of
Tektronix, Inc.

WARRANTY
Tektronix warrants that the products that it manufactures and sells will be free from defects
in materials and workmanship for a period of one (1) year from the date of shipment. If a
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.
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 attempts 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 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
EXCLUSIVE 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.

P7350SMA 5 GHz Differential Probe Instruction Manual i
Table of Contents
Preface v............................................
Contacting Tektronix vi.................................
General Safety Summary vii..............................
Service Safety Summary ix..............................
Getting Started 1.....................................
Features and Standard Accessories 2......................
Optional Accessories 5.................................
Options 6............................................
P7350SMA Probe Head 7...............................
TekConnect Interface 9.................................
Functional Check 10....................................
Signal Check 10.......................................
DC Termination Check 11...............................
Probe Calibration 13....................................
Probe Applications 14...................................
Operating Basics 15...................................
Input Circuitry 15......................................
Probe Termination Network 16...........................
Differential Signals 16..................................
Single-Ended Signals 17.................................
Matched-Delay Cables 19...............................
DC Termination Voltage Input 21.........................
Calculating DC Termination Resistor Power 22..............
DC Voltage Applied to SMA Inputs with the
DC Termination Voltage Input Grounded 23..............
Complementary Input Signal with the
DC Termination Voltage Input Open 24..................
Complementary Input Signal with the
DC Termination Voltage Input Shorted (Grounded) 26......
Equations and Definitions 28.............................
Internal Probe Amplifier 29..............................
Maximum Input Voltage 29..............................
Common-Mode Signal Range 29..........................
Differential-Mode Signal Range 29........................
Differential Offset Range 30.............................
Common-Mode Rejection 31.............................
Input Impedance and Probe Loading 31.....................

Table of Contents
ii P7350SMA 5 GHz Differential Probe Instruction Manual
Checking the Skew Between Inputs 32.....................
Adjusting Cable Skew 33................................
Deskewing Probes 35...................................
Reference 39.........................................
Differential Measurements 39............................
Common-Mode Rejection Ratio 40........................
Extending the Input Connections 41.......................
InfiniBand 42.........................................
Appendix A: Specifications 43...........................
Warranted Characteristics 43.............................
Typical Characteristics 44...............................
Nominal Characteristics 48..............................
Mechanical Characteristics 48............................
Appendix B: Performance Verification 51.................
Equipment Required 51.................................
Special Adapters Required 53............................
TekConnect-to-SMA Adapter 53..........................
TekConnect Interface Calibration Adapter 54................
Equipment Setup 55....................................
Input Resistance 56.....................................
Output Offset Zero 57...................................
DC Gain Accuracy 58...................................
Rise Time 60..........................................
Appendix C: Maintenance 67...........................
Inspection and Cleaning 67..............................
Replacement Parts 68...................................
Preparation for Shipment 68..............................
Appendix D: Replaceable Parts 69.......................
Parts Ordering Information 69............................
Using the Replaceable Parts List 70........................
Item Names 70........................................
Indentation System 70..................................
Abbreviations 70.......................................

Table of Contents
P7350SMA 5 GHz Differential Probe Instruction Manual iii
List of Figures
Figure 1: P7350SMA differential probe 1..................
Figure 2: Probe head connections 8.......................
Figure 3: Connecting and disconnecting the probe 9..........
Figure 4: Probe signal check setup 10......................
Figure 5: Probe DC termination check 12...................
Figure 6: Typical probe applications and configurations 14.....
Figure 7: Simplified probe schematic 15....................
Figure 8: Single-ended drive 17...........................
Figure 9: Resultant waveform from an unterminated input 18...
Figure 10: Distorted pulse edge 20.........................
Figure 11: Worst-case power dissipation example 23..........
Figure 12: Example of probe with DC input open 24..........
Figure 13: Example of probe with DC input shorted to ground 26
Figure 14: Probe amplifier and offset circuit 30..............
Figure 15: Typical probe input model 31....................
Figure 16: Checking skew between inputs 33................
Figure 17: Using the phase adjuster 34.....................
Figure 18: Deskewing two P7350SMA probes 36.............
Figure 19: Simplified model of a differential amplifier 39......
Figure 20: InfiniBand signals 42..........................
Figure 21: Typical common- and differential-mode gain plots 46
Figure 22: Typical differential input return loss 47............
Figure 23: Typical differential-mode bandwidth 47............
Figure 24: Probe head and compensation box dimensions 49....
Figure 25: TekConnect-to-SMA Adapter 53.................
Figure 26: TekConnect Interface Calibration Adapter 54.......
Figure 27: Checking differential mode input resistance 56......
Figure 28: Setup for the output offset zero test 57.............
Figure 29: DC Gain Accuracy setup 58.....................
Figure 30: Reverse the power supply polarity
on the probe inputs 59................................
Figure 31: Test system rise time setup 61...................
Figure 32: Setting the TDR parameters 62...................
Figure 33: Test system rise time setup with probe 64..........
Figure 34: Replaceable parts 71...........................
Figure 35: Standard accessories 72........................
Figure 36: Optional accessories 74.........................

Table of Contents
iv P7350SMA 5 GHz Differential Probe Instruction Manual

P7350SMA 5 GHz Differential Probe Instruction Manual v
Preface
This is the Instruction Manual for the P7350SMA differential probe.
This manual provides operating information, specifications,
performance verification procedures, and a replaceable parts list.

Preface
vi P7350SMA 5 GHz Differential Probe Instruction Manual
Contacting Tektronix
Phone [phone]*
Address Tektronix, Inc.
Department or name (if known)
14200 SW Karl Braun Drive
P.O. Box 500
Beaverton, OR 97077
USA
Web site www.tektronix.com
Sales
support
1-800-833-9200, select option 1*
Service
support
1-800-833-9200, select option 2*
Technical
support
www.tektronix.com/support
1-800-833-9200, select option 3*
6:00 a.m. -- 5:00 p.m. Pacific Standard Time
*This phone number is toll free in North America. After office hours, please
leave a voice mail message.
Outside North America, contact a Tektronix sales office or distributor; see
the Tektronix web site for a list of offices.

P7350SMA 5 GHz Differential Probe Instruction Manual vii
General Safety Summary
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.
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. Disconnect the probe input from the circuit under test
before disconnecting the probe 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.
The common terminal is at ground potential. Do not connect the
common terminal to elevated voltages.
Do Not Operate Without Covers. Do not operate this product with
covers or panels removed.
Do Not Operate With Suspected Failures. If you suspect there is damage
to this product, have it inspected by qualified service personnel.
Do Not Operate in Wet/Damp Conditions.
Do Not Operate in an Explosive Atmosphere.
Keep Product Surfaces Clean and Dry.

General Safety Summary
viii P7350SMA 5 GHz Differential Probe Instruction Manual
Safety Terms and Symbols
Terms in This Manual. 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.
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 an injury hazard not immediately accessible as
you read the marking.
CAUTION indicates a hazard to property including the product.
Symbols on the Product. These symbols may appear on the product:
CAUTION
Refer to Manual

P7350SMA 5 GHz Differential Probe Instruction Manual ix
Service Safety Summary
Only qualified personnel should perform service procedures. Read
this Service Safety Summary and the General Safety Summary before
performing any service procedures.
Do Not Service Alone. Do not perform internal service or adjustments
of this product unless another person capable of rendering first aid
and resuscitation is present.

Service Safety Summary
xP7350SMA 5 GHz Differential Probe Instruction Manual

P7350SMA 5 GHz Differential Probe Instruction Manual 1
Getting Started
The P7350SMA is a 5 GHz, active differential probe designed for
Serial Data Analysis (SDA) compliance testing and other applica-
tions that use differential serial busses in a 50 Ωsignaling environ-
ment. The SMA input connectors each terminate with an internal
50 Ωresistor. Banana plug terminals on the probe head provide
inputs for a common-mode DC termination voltage. The probe
incorporates the high-performance TekConnect interface to
communicate with the host instrument.
Figure 1: P7350SMA differential probe
The probe is shipped with 50 Ωtermination caps connected to the
SMA inputs. When you make single-ended measurements, leave one
of the termination caps on the unused input to provide a clean, 50 Ω
termination for the single-ended signal. When you are not using the
probe, leave both of the termination caps connected to protect the
SMA inputs from damage.

Getting Started
2P7350SMA 5 GHz Differential Probe Instruction Manual
Features and Standard Accessories
Table 1 shows the features and standard accessories of the
P7350SMA differential probe.
Table 1: P7350SMA features and standard accessories
Feature/Accessory Description
TekConnect interface. The TekConnect interface provides a
communication path between the probe and the oscilloscope.
Contact pins provide power, signal, offset, and probe characteris-
tic data transfer.
The probe snaps into the oscilloscope when fully engaged. To
remove, grasp the compensation box, press the latch button, and
pull the probe out.
For more information, see page 9.
Input connections. The SMA terminals provide shielded,
low-noise connections to your circuit. Differential or single-ended
signals are buffered by the internal probe amplifier and are sent
through the TekConnect interface to the oscilloscope.
See Operating Basics on page 15 for more information.
External DC termination voltage connections. The red and
black banana jacks on the probe head provide a means for
connecting an external DC voltage to the internal termination
network, for drivers that require a DC termination voltage.
You should use shielded test cables when connecting external DC
voltages to these terminals. For example, use a coaxial BNC
cable and a BNC-to-dual banana plug adapter.
Caution: The internal termination resistors are rated for 500 mW.
To prevent exceeding these limits, see page 22 for information on
calculating power dissipation and other related topics.

Getting Started
P7350SMA 5 GHz Differential Probe Instruction Manual 3
Table 1: P7350SMA features and standard accessories (Cont.)
Feature/Accessory Description
Male SMA termination (2 ea). Protect the probe input circuitry by
connecting the termination to the probe SMA input connector
when the probe is not in use. When making single-ended
measurements in a 50 Ωenvironment, use one of these
terminations on the unused input.
The probe is shipped with the terminations connected to the probe
SMA inputs.
Tektronix part number: 015-1022-01
Dual SMA cables. These 12-in cables are bound together and
have a skew of less than 10 ps. The cables provide matched
signal paths from your circuit to the probe to ensure more
accurate differential signal measurements.
Tektronix part number: 174-4866-XX
Dual banana shorting plug. Use the shorting plug when you are
calibrating the probe, or when you need to bring the common-
mode node of the termination network to ground.
Tektronix part number: 012-1667-XX
Markers Cable marker bands (10 ea). Attach matching pairs of the
marker bands onto the cable at both the head and compensation
box of each probe. The marker bands allow you to quickly verify
which instrument channel your probe is connected to when you
are using multiple channels.
Tektronix part number: 016-1886-XX (package of 10)
SMA Female-to-BNC Male adapter. Use the adapter to connect
the probe SMA inputs to BNC connections, such as the BNC
calibration output connector on your oscilloscope.
Tektronix part number: 015-0572-XX

Getting Started
4P7350SMA 5 GHz Differential Probe Instruction Manual
Table 1: P7350SMA features and standard accessories (Cont.)
Feature/Accessory Description
Antistatic wrist strap. When using the probe, always work at an
antistatic work station and wear the antistatic wrist strap.
Tektronix part number: 006-3415-XX
Calibration certificate. A certificate of traceable calibration is
provided with every instrument shipped.
Instruction Manual. Provides instructions for operating and
maintaining the P7350SMA differential probe.
Tektronix part number: 071-1264-XX
Carrying case with inserts. The soft-sided nylon carrying case has
several compartments to hold the probe, accessories, and related
documentation. Use the case to store or transport the probe.
Tektronix part number 016-1952-XX

Getting Started
P7350SMA 5 GHz Differential Probe Instruction Manual 5
Optional Accessories
Table 2 shows the optional accessories that you can order for the
P7350SMA differential probe.
Table 2: Optional accessories
Accessory Description
BNC-to-dual banana plug adapter. Use these adapters with
BNC cables to provide a shielded path to the DC termination
voltage terminals on the probe.
Tektronix part number: 103-0090-XX
Phase adjuster. Use two phase adjusters if you need to bring the
skew between inputs to 1 ps or less when you use the
matched-delay SMA cables to connect to your circuit.
The matched-delay SMA cables that come with your probe have a
≤10 ps warranted skew at the cable ends.
Tektronix part number: 015-0708-XX
SMA Male-to-Male adapter. Use the adapter to connect the
probe SMA inputs to other SMA female connections, such as
those on your test fixture or sampling head. See Figure 24 on
page 49 for SMA connector spacing dimensions.
Tektronix part number: 015-1011-XX
TekConnect interface calibration adapter. The calibration
adapter is required when a performance verification or adjustment
is done on the probe. It provides connectors and test points for
internal probe measurements.
Tektronix part number: 067-0422-XX