Tektronix P7330 User Manual

User Manual

P7330

3.5 GHz Differential Probe

071-0758-04

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, SureFoot, and TekConnect are registered trademarks of
Tektronix, Inc., and KlipChip is a trademark 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.

Preface

This is the User Manual for the P7330 differential probe.
This manual provides operating information, specifications, and a
replaceable parts list.

Related Manuals

If you need to do a performance ve rification or ma ke internal
adjustments to your probe, refer to the P7330 3.5 GHz Differential
Probe Service Manual, Tektronix part number 071-1057-XX. The
manual is a printable pdf file, and is available on both the Tektronix
website and the Optional Applications CD that is included with
Tektronix oscilloscopes featuring the TekConnect interface.

P7330 3.5 GHz Differential Probe User Manual

i

Preface

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

1-800-833-9200, select option 1*

support

Service

1-800-833-9200, select option 2*

support

Technical

Email: [e-mail]

support

1-800-833-9200, select option 3*

6:00 a.m. -- 5:00 p.m. Pacific 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.

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P7330 3.5 GHz Differential Probe User Manual

Table of Contents

General Safety Summary iii............................

Preface v............................................

Related Manuals v....................................

Contacting Tektronix vi.................................

Getting Started 1.....................................

TekConnect Interface 1.................................

Functional Check 3....................................

Options 4............................................

Features and Standard Accessories 5......................

Optional Accessories 9.................................

Operating Basics 11...................................

Input Voltage Limits 12.................................

Maximum Input Voltage 12..............................

Common-Mode Signal Range 12..........................

Differential-Mode Signal Range 12........................

Common-Mode Rejection 12.............................

Probing Techniques to Maximize CMRR 13.................

Input Impedance and Probe Loading 14.....................

Probe Grounding 15....................................

Electrical Effects of Accessories 16........................

Reference 17.........................................

Problems with Single-Ended Measurements 17...............

Differential Measurements 17............................

Common-Mode Rejection Ratio 18........................

Assessing CMRR Error 18...............................

Input Impedance Effects on CMRR 19.....................

Extending the Input Leads 19.............................

Extending the Ground Lead 20............................

Appendix A: Specifications 21...........................

Appendix B: User Service 27............................

Appendix C: Replaceable Parts 29.......................

P7330 3.5 GHz Differential Probe User Manual

iii

Table of Contents

List of Figures

Figure 1: P7330 differential probe featuring the

TekConnect Interface 1..............................

Figure 2: Connecting and disconnecting the probe 2..........

Figure 3: Probe functional check connections 3.............

Figure 4: Protect the probe tips with the protective cover 11....

Figure 5: Using the variable spacing adapter 13..............

Figure 6: Using the TwinFoot adapter 13....................

Figure 7: Typical probe input model 14.....................

Figure 8: Probe ground input 15...........................

Figure 9: Typical effects on a signal using probe t ip adapters 16.

Figure 10: Simplified model of a differential amplifier 18......

Figure 11: Twisting the input leads 20......................

Figure 12: Typical common-mode gain 24..................

Figure 13: Typical differential input impedance vs frequency 24.

Figure 14: Probe head and compensation box dimensions 25....

Figure 15: P7330 replaceable parts 31......................

Figure 16: P7330 standard accessories 33...................

Figure 17: P7330 optional accessories 35...................

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P7330 3.5 GHz Differential Probe User Manual

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 and the probe ground 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.

P7330 3.5 GHz Differential Probe User Manual

v

General Safety Summary

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 practice s 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 i ncluding the product.

Symbols on the Product. These symbols may appear on the product:

CAUTION

Refer to Manual

vi

P7330 3.5 GHz Differential Probe User Manual

Getting Started

The P7330 is a high-bandwidth (3.5 GHz) active differential probe
with a miniaturized probe head design. The probe has low circuit
loading, high common-mode rejection, and comes with a variety of
accessories for connecting to surface-mount devices and other
components.

Figure 1: P7330 differential probe featuring the TekConnect Interface

TekConnect Interface

The P7330 probe is powered through a TekConnect Interface
between the probe compensation box and the oscilloscope. The
TekConnect Interface provides a comm unication path through
contact pins on the host instrument. Power, signal, offset, and probe
characteristic data transfer through the interface.

P7330 3.5 GHz Differential Probe User Manual

1

Getting Started

When the probe is connected, the oscilloscope reads EEPROM
information from the probe, identifying the device and allowing the
appropriate power supplies to be turned on. The preamp inputs on the
oscilloscope are ESD protected by remaining grounded until a valid
TekConnect device is detected.

The TekConnect Interface features a spring-loaded latch that
provides audible and tactile confirmation that a reliable connection
has been made to the oscilloscope. Slide the probe into the
TekConnect receptacle on the oscilloscope. The probe snaps into the
oscilloscope when fully engaged. See Figure 2.

To release the probe from the oscilloscope, grasp the compensation
box, press the latch button, and pull out the probe.

Latch button

Figure 2: Connecting and disconnecting the probe

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P7330 3.5 GHz Differential Probe User Manual

Functional Check

After installing the probe on the oscilloscope, a functional check
may be performed using the PROBE COMPENSATION connections
on the front panel of the oscilloscope. See Figure 3.

Getting Started

Figure 3: Probe functional check connections

1. Connect the probe to the oscilloscope.

2. Set the oscilloscope to display the probe channel.

3. Connect the square pin adapter to the probe tip, and connect the

Y-lead adapter to the square pin adapter. Plug the SMT KlipChips
into the Y-lead adapter.

4. Connect the SMT KlipChips to the PROBE COMPENSATION

connections on the oscilloscope.

5. Adjust the oscilloscope to display a stable calibration waveform.

P7330 3.5 GHz Differential Probe User Manual

3

Getting Started

NOTE. If your instrument supports probe calibration routines, now is
a good time to perform them.

6. Disconnect the probe from the PROBE COMPENSATION

connector and connect the two KlipChips together.

7. With the probe offset set to 0.0 V, the oscilloscope display should

be at the ground reference.

8. Set the oscilloscope volts/division to 500 mV.

9. Adjust the probe offset. The displayed waveform should vary

between approximately +1.0 V and --1.0 V.

Options

The following options are available when ordering the P7330 probe:

H Option D1 -- Calibration Data

H Option C3 -- 3 years Calibration Service

H Option D3 -- 3 years Calibration Data (requires Option C3)

H Option R3 -- 3 years Extended Warranty

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P7330 3.5 GHz Differential Probe User Manual

Features and Standard Accessories

Table 1 shows the features and standard accessories of the P7330
differential probe.

Table 1: P7330 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 characteris­tic 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.

Getting Started

Input connections. The plus and minus connections on the
probe tip accept the standard and optional probe accessories.

+

--

Ground

(Some of the accessories connect to the probe tip through the
square pin adapter). The ground lead connects to the probe head
through a slot in the side of the insulated probe housing.

WARNING: Skin penetration hazard. To prevent injury, install the
probe tip cover when the probe is not in use. The probe tips are
extremely sharp to ensure good contact and measurement
integrity.

Probe tip cover. The probe tip cover is shipped on the probe.
The probe tips are extremely sharp to ensure good contact and
measurement integrity. When not using the probe, slide the probe
tip cover over the probe head to prevent damage to the probe tips
and to protect yourself from personal injury.

Tektronix part number: 200-4236-00

Three-inch ground lead (2 ea). Use the ground lead for
connecting the probe ground to the circuit, if needed. The
socketed end of the lead may be connected to accessories, or
fitted onto 0.025-inch square pins.

P7330 3.5 GHz Differential Probe User Manual

Tektronix part number: 196-3469-00 (package of 2)

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