Tektronix P6205 User manual

Instruction Manual
P6205
FET Probe
070-8202-01
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.

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.
Printed in the U.S.A.
Tektronix, Inc., P.O. Box 1000, Wilsonville, OR 97070–1000
TEKTRONIX, TEK, and TEKPROBE are registered trademarks
of Tektronix, Inc.
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 purchase from
an authorized Tektronix distributor. 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. Batteries are excluded from this warranty.
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, shipping charges prepaid,
and with a copy of customer proof of purchase. 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 WITH RESPECT TO THE
LISTED PRODUCTS 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.

P6205 Instruction Manual i
Table of Contents
General Safety Summary v. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Safety Summary vii. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preface ix. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contacting Tektronix x. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Getting Started
Product Description 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oscilloscopes without the TEKPROBE Interface 1–1. . . . . . . .
Standard Accessories 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Probe Features 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Grounding the Probe 1–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Basics
Ground Lead Inductance 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Linear Operating Range 2–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
High-Amplitude Frequency Response 2–3. . . . . . . . . . . . . . . . . . . .
Step Inputs 2–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sine Wave Inputs 2–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications
Performance Verification
Test Equipment 4–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Attenuation Check 4–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rise Time Check 4–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rise Time Approximation 4–7. . . . . . . . . . . . . . . . . . . . . . . . . .
Bandwidth Approximation 4–8. . . . . . . . . . . . . . . . . . . . . . . . . .
Aberrations Check 4–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Offset Check 4–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of Contents
ii P6205 Instruction Manual
Maintenance
Preventive Maintenance 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Visual Inspection 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning 5–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Corrective Maintenance 5–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Static Sensitive Devices 5–3. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing the Probe Tip 5–3. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing the TEKPROBE Contact Pins 5–3. . . . . . . . . . . . . .
Replacing Internal Assemblies: Probe Head and Cable,
BNC and Circuit Board Carrier 5–4. . . . . . . . . . . . . . . . . . .
Readjustment Following Repair 5–6. . . . . . . . . . . . . . . . . . . . .
Repackaging for Shipment 5–6. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replaceable Parts
Parts Ordering Information 6–1. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Module Servicing 6–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using the Replaceable Parts List 6–2. . . . . . . . . . . . . . . . . . . . . . . .
Abbreviations 6–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mfr. Code to Manufacturer Cross Index 6–3. . . . . . . . . . . . . . .

Table of Contents
P6205 Instruction Manual iii
List of Figures
Figure 1–1: P6205 probe with accessories 1–2. . . . . . . . . . . . . . .
Figure 1–2: Probe finger guard and hand contact area 1–7. . . .
Figure 2–1: Equivalent circuit showing added probe and
ground lead resistance, capacitance, and inductance 2–1. . .
Figure 2–2: Effects of ground lead inductance on waveform
fidelity 2–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–3: P6205 typical input vs linear operating range 2–4.
Figure 2–4: Bandwidth vs sine wave input amplitude 2–5. . . . .
Figure 3–1: Typical input impedance vs frequency 3–5. . . . . . .
Figure 3–2: Voltage derating vs frequency 3–5. . . . . . . . . . . . . .
Figure 3–3: Linearity error vs output voltage 3–6. . . . . . . . . . . .
Figure 3–4: Typical frequency response 3–6. . . . . . . . . . . . . . . .
Figure 4–1:Attenuation test setup part 1 4–3. . . . . . . . . . . . . . .
Figure 4–2: Calibrator waveform 4–4. . . . . . . . . . . . . . . . . . . . .
Figure 4–3: Cursors placement for D voltage measurement 4–4
Figure 4–4:Attenuation test setup part 2 4–5. . . . . . . . . . . . . . .
Figure 4–5: Rise time test setup 4–6. . . . . . . . . . . . . . . . . . . . . . .
Figure 4–6: Rise time waveform 4–7. . . . . . . . . . . . . . . . . . . . . . .
Figure 4–7:Aberrations test setup part 1 4–9. . . . . . . . . . . . . . .
Figure 4–8:Aberrations waveform 4–10. . . . . . . . . . . . . . . . . . . .
Figure 4–9: Measuring aberrations 4–11. . . . . . . . . . . . . . . . . . . .
Figure 4–10:Aberrations test setup part 2 4–12. . . . . . . . . . . . . .
Figure 5–1: Disassembling the P6205 probe 5–5. . . . . . . . . . . . .
Figure 6–1: P6205 probe with standard accessories 6–4. . . . . . .
Figure 6–2: P6205 probe optional accessories 6–6. . . . . . . . . . . .

Table of Contents
iv P6205 Instruction Manual
List of Tables
Table 1–1: Standard accessories 1–3. . . . . . . . . . . . . . . . . . . . . .
Table 3–1: Electrical characteristics 3–1. . . . . . . . . . . . . . . . . . .
Table 3–2: Environmental characteristics 3–4. . . . . . . . . . . . . .
Table 3–3: Physical characteristics 3–4. . . . . . . . . . . . . . . . . . . .
Table 3–4: Certifications and compliances 3–4. . . . . . . . . . . . . .
Table 4–1: Test equipment 4–2. . . . . . . . . . . . . . . . . . . . . . . . . . .

P6205 Instruction Manual v
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.
Only qualified personnel should perform service procedures.
While using this product, you may need to access other parts of the
system. Read the General Safety Summary in other system manuals
for warnings and cautions related to operating the system.
To Avoid Fire or Personal Injury
Connect and Disconnect Properly. Do not connect or disconnect probes
or test leads while they are connected to a voltage source.
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.
Connect the ground lead of the probe to earth ground only.
Avoid Exposed Circuitry. Do not touch exposed connections and
components when power is present.
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
vi P6205 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:
ProtectiveGround
(Earth)Terminal CAUTION Refer to Manual Double Insulated
WARNING
High Voltage

P6205 Instruction Manual vii
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.
Disconnect Power. To avoid electric shock, disconnect the mains
power by means of the power cord or, if provided, the power switch.
Use Care When Servicing with Power On. Dangerous voltages or currents
may exist in this product. Disconnect power, remove battery (if
applicable), and disconnect test leads before removing protective
panels, soldering, or replacing components.
To avoid electric shock, do not touch exposed connections.

Service Safety Summary
viii P6205 Instruction Manual

P6205 Instruction Manual ix
Preface
This manual provides operating and maintenance information for the
Tektronix P6205 FET probe.
The manual is organized into the following sections:
Getting Started provides a product overview and introduction to
probe features and accessories.
Operating Basics discusses techniques for improving measure-
ment accuracy.
Specifications lists the probe warranted characteristics.
Performance Verification contains procedures to verify probe
performance.
Maintenance contains inspection and cleaning procedures and
instructions for replacing probe modules.
Replaceable Parts lists the standard and optional probe parts and
accessories and provides ordering information.

Preface
xP6205 Instruction Manual
Contacting Tektronix
Product
Support For application-oriented questions about a Tektronix measurement product, call toll free in North
America:
1-800-TEK-WIDE (1-800-835-9433 ext. 2400)
6:00 a.m. – 5:00 p.m. Pacific time
Or contact us by e-mail:
[email protected]
For product support outside of North America,
contact your local Tektronix distributor or sales
office.
Service
Support Contact your local Tektronix distributor or sales office. Or visit our web site for a listing of
worldwide service locations.
http://www.tek.com
For other
information In North America: 1-800-TEK-WIDE (1-800-835-9433)
An operator will direct your call.
To write us Tektronix, Inc.
P.O. Box 1000
Wilsonville, OR 97070-1000

Getting Started

P6205 Instruction Manual 1–1
Getting Started
The Tektronix P6205 FET probe is an active 10X-attenuating probe
that is compatible with Tektronix TDS 500 Series, DSA 600 Series,
11000 Series, and CSA 404 oscilloscopes and plug-in units.
Product Description
The P6205 probe provides high-frequency measurement capability
without the capacitive loading and performance limitations inherent
in passive resistive-divider type probes. FETs are used in the P6205
to establish the characteristic high input impedance at high
frequency of an active probe. The P6205 features a 750 MHz
bandwidth with an input impedance of 1 MWin parallel with 2 pF.
You must terminate the P6205 probe output into 50 W.
The P6205 includes the TEKPROBEtLevel 2 interface. When used
with a fully TEKPROBE interface-compatible oscilloscope, the
P6205 probe is powered by the host instrument and provides the
oscilloscope with the probe model number, serial number, and
attenuation factor. When installed on a fully compatible oscillo-
scope, the oscilloscope channel input is automatically set to 50 W
and the display readouts are corrected for the probe attenuation
factor.
Oscilloscopeswithout the TEKPROBE Interface
The P6205 is an active probe that requires external power to operate.
If your oscilloscope is not equipped with the TEKPROBE interface,
we recommend that you use the Tektronix 1103 TEKPROBE Power
Supply. By connecting the probe to the 1103 power supply, and the
power supply output to your oscilloscope input, you can use the
P6205 probe with oscilloscopes having conventional BNC inputs.
The 1103 can power two P6205 probes simultaneously.
To maintain the best possible high-frequency response with the 1103
power supply, keep the cable connecting the 1103 output to the
oscilloscope input as short as possible. You must use an oscilloscope
with 50 Winput impedance with this system.

Getting Started
1–2 P6205 Instruction Manual
NOTE. Using the P6205 probe with an 1103 power supply will not
add full TEKPROBE functionality to an incompatible oscilloscope.
In addition, the 1103 probe offset adjustment does not apply to
P6205 probes.
1
2
3
4
5
67
8
9
10 1Probe head and cable
2Ground leads
3 Compensation box
4BNC locking ring
5 TEKPROBE contact pins
6Retractable-hook tip
7 Low-inductance ground tip
8Ground sleeve tip cover
9 IC protector tip
10 SMT KlipChipt
Figure 1–1: P6205 probe with accessories

Getting Started
P6205 Instruction Manual 1–3
Standard Accessories
Table 1–1 lists the P6205 probe standard accessories.
Table 1–1: Standard accessories
1Retractable-hook tip
1Ground lead with square-pin receptacle
1Ground lead with alligator clip
1Ground contact spring
1Ground sleeve tip cover
1IC protector tip
1SMT KlipChip
1Instruction manual
The Replaceable Parts section beginning on page 6–1, contains
ordering information for all standard and optional accessories.
Probe Features
The following table introduces P6205 probe components, connectors,
and accessories. Refer to Figure 1–1 to identify probe items and
where to attach standard accessories.
Probe Head and Cable. The probe tip makes a physical
connection to the test point. The flexible cable allows you to make
measurements in a variety of applications.
Compensation Box. The compensation box contains circuitry,
including elements of the TEKPROBE interface. There are no
internal adjustments.

Getting Started
1–4 P6205 Instruction Manual
D
a
t
a
–5 V
+5 V
Clock
Signal
Ground
TEKPROBE Interface (Level 2). The TEKPROBE interface
provides a communication path between the probe and the host
instrument. Contact pins provide connections for power, signal,
and data transfer. The interface allows some oscilloscopes to
automatically configure the correct attenuation factor and input
impedance and to access the probe serial number.
Some features of the TEKPROBE interface, for example probe
offset and additional voltage sources, are not required by the
P6205; therefore, the contact pins are omitted from the connector.
NOTE. Your oscilloscope may not implement all features of
the TEKPROBE interface. Refer to your oscilloscope
manual for details.
BNC Locking Ring. The BNC locking ring houses the
TEKPROBE interface contact pins and provides a positive
attachment to the host instrument.
To install the probe, open the locking ring by rotating it
counterclockwise; push the assembly firmly onto the oscilloscope
(or power supply) BNC input connector. Rotate the ring clockwise
one-quarter turn to secure it to the input connector.
Retractable-Hook Tip.1Attach the retractable-hook tip to your
signal test point for hands-free operation. The hook tip attaches
easily to leaded components such as resistors, capacitors, and
discrete semiconductors. Stripped wire, jumpers, busses, and test
pins can also be gripped with the retractable hook tip.
To remove the hook tip (your probe is shipped with the hook tip
installed), simply pull it off. Reinstall the hook tip by pushing it
firmly onto the molded barrel of the probe tip.
IC Protector Tip.2Use the IC protector tip to simplify probing of
in-line IC packages. The shape of the protector tip guides the
probe onto IC pins and prevents accidental shorting of pins by the
probe tip.
To install the IC protector tip, push it firmly onto the end of the
metal barrel of the probe tip while taking care not to pierce
yourself with the sharp tip.
NOTE: Remove the IC protector tip by pulling it off before
installing the retractable-hook tip.