Tektronix P6205 Service 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
T ektronix 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 T ektronix 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.
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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
P6205 Instruction Manual
i
Table of Contents
Maintenance
Preventive Maintenance 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
V isual 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. . . . . . . . . . . . . . .
ii
P6205 Instruction Manual
List of Figures
Figure 1–1: P6205 probe with accessories 1–2. . . . . . . . . . . . . . .
Figure 1–2: Probe finger guard and hand contact ar ea 1–7. . . .
Figure 2–1: Equivalent circuit showing added pr obe 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. . . . .
Table of Contents
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. . . . . . . . . . . .
P6205 Instruction Manual
iii
Table of Contents
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. . . . . . . . . . . . . . . . . . . . . . . . . . .
iv
P6205 Instruction 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.
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.
P6205 Instruction 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 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:
WARNING
High Voltage
Protective Ground
(Earth) Terminal
CAUTION
Refer to Manual
Double
Insulated
vi
P6205 Instruction Manual
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.
P6205 Instruction Manual
vii
Service Safety Summary
viii
P6205 Instruction Manual
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
Operating Basics discusses techniques for improving measure-
Specifications lists the probe warranted characteristics.
Performance Verification contains procedures to verify probe
Maintenance contains inspection and cleaning procedures and
Replaceable Parts lists the standard and optional probe parts and
probe features and accessories.
ment accuracy .
performance.
instructions for replacing probe modules.
accessories and provides ordering information.
P6205 Instruction Manual
ix
Preface
Contacting Tektronix
Product
Support
Service
Support
For other
information
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:
tm_app_supp@tek.com
For product support outside of North America,
contact your local Tektronix distributor or sales
office.
Contact your local Tektronix distributor or sales
office. Or visit our web site for a listing of
worldwide service locations.
http://www.tek.com
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
x
P6205 Instruction Manual
Getting Started
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 MW in parallel with 2 pF.
You must terminate the P6205 probe output into 50 W.
The P6205 includes the TEKPROBEt Level 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 oscilloscope, the oscilloscope channel input is automatically set to 50 W
and the display readouts are corrected for the probe attenuation
factor.
Oscilloscopes without 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 W input impedance with this system.
P6205 Instruction Manual
1–1
Getting Started
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.
6
7
1
3
8
9
2
10
1 Probe head and cable
2 Ground leads
3 Compensation box
4 BNC locking ring
5 TEKPROBE contact pins
5
Figure 1–1: P6205 probe with accessories
4
6 Retractable-hook tip
7 Low-inductance ground tip
8 Ground sleeve tip cover
9 IC protector tip
10 SMT KlipChipt
1–2
P6205 Instruction Manual
Standard Accessories
Table 1–1 lists the P6205 probe standard accessories.
T able 1–1: Standard accessories
1 Retractable-hook tip
1 Ground lead with square-pin receptacle
1 Ground lead with alligator clip
1 Ground contact spring
1 Ground sleeve tip cover
1 IC protector tip
1 SMT KlipChip
Getting Started
1 Instruction 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.
P6205 Instruction Manual
1–3
Getting Started
Dat
–5 V
Signal
Ground
+5 V
a
Clock
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.1 Attach 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.2 Use 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.
1–4
P6205 Instruction Manual
Getting Started
Ground Sleeve Tip Cover.2 Use the ground sleeve tip cover to
keep the metal sleeve of the probe tip from accidentally shorting
components on your device under test.
To install the ground sleeve tip cover, push it onto the metal barrel
of the probe tip while taking care not to pierce yourself with the
sharp probe tip. Remove the sleeve by pulling it off before
installing the retractable hook tip.
Ground Leads.1 Use the long ground leads when length is
important and precise high-frequency measurement is not. Long
ground leads are ideal for quick troubleshooting when you are
looking for the presence, absence, or general shape of a signal.
For maximum performance, always use the shortest ground lead
possible.
To attach the ground lead, press the spring clip onto the collar of
the probe head. An alternative ground connection can also be
made to the metal barrel of the probe tip.
Low-Inductance Ground Contact (Spring Tip). Use the
low-inductance spring-tip ground contact to reduce ground lead
inductance. The performance of a probe fitted with the
low-inductance ground contact approaches that of no-lead probe
fixtures and adapters. With the spring-tip contact installed, you
can make measurements up to the system bandwidth of your
probe/oscilloscope with negligible signal degradation from ground
lead inductance.
To install the low-inductance ground contact, push it onto the
metal barrel of the probe tip while taking care not to pierce
yourself with the sharp probe tip.
NOTE: The spring contact installs more easily if you rotate
the spring counterclockwise (loosening the spring tension)
as you push it onto the probe barrel. Use care to avoid the
accidentally shorting of component leads to ground when
using this tip.
P6205 Instruction Manual
1–5
Getting Started
SMT KlipChipt. Use the retractable KlipChip if you need
hands-free attachment to a physically small signal or ground
source. The low profile of the KlipChip allows you to grasp
devices that the Retractable Hook Tip cannot.
To use the KlipChip as a ground connector, attach the long
ground lead with square-pin termination to the probe collar.
Connect the ground lead termination to one of the KlipChip
shoulder pins.
To use the KlipChip as a signal connector, slide the optional
single-lead probe tip adapter (see Replaceable Parts list) onto the
probe tip. Connect the single-lead termination to one of the
KlipChip shoulder pins.
To use the KlipChip as both ground and signal connector, slide
the optional dual-lead probe tip adapter (See Replaceable Parts)
onto the probe tip. Connect both single-lead terminations to the
shoulder of a separate KlipChip pin. You can also combine the
single-lead adapter with a long ground lead to configure dual
KlipChip connections.
1
For maximum flexibility, use one of the six-inch ground leads. For precise
measurements at high frequency, the inductance associated with long ground
leads may distort the high-frequency component of your signal. Consider
whether you can use one of the low-inductance probe tip configurations
instead. For tips on minimizing ground lead inductance, refer to the Operating
Basics section beginning on page 2–1.
2
Use a ground lead with this accessory. Be sure to take into account ground
lead inductance effects on measurements at frequencies approaching 30 MHz.
For tips on minimizing ground lead inductance, refer to the Operating Basics
section beginning on page 2–1.
1–6
P6205 Instruction Manual
Grounding the Probe
Connect the probe to the instrument and connect the ground lead to
ground before making any measurements. Ensure that no part of the
ground lead contacts voltage in the circuit under test. Except for the
probe tip and BNC center conductor, all accessible metal (including
the ground clip) is connected to the BNC shell.
WARNING. To avoid electric shock when using the probe, keep your
fingers behind the finger guard on the probe body. See Figure 1–2
below.
Getting Started
Hand contact area
Finger
guard
Figure 1–2: Probe finger guard and hand contact area
P6205 Instruction Manual
1–7
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