Tektronix P6339A Primary User

Instruction Manual
P6339A 500 MHz Buffered Passive Probe
071-0178-01
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, TEKPROBE, and SureFoot are registered trademarks of
Tektronix, Inc. KlipChip is a trademark of Tektronix, Inc. Copyright © Tektronix, Inc. All rights reserved.
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 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. T ektronix 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.

Table of Contents

General Safety Summary v. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Safety Summary vii. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contacting Tektronix ix. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Getting Started 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Features and Accessories 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Optional Accessories 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Functional Check 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
T ekProbe Communication 5. . . . . . . . . . . . . . . . . . . . . . . . . .
DC Offset 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC Gain and Attenuation 6. . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Basics 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Probe Compensation 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maximum Input Voltage 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
High-Frequency Probe Connections 8. . . . . . . . . . . . . . . . . . . . .
Specifications 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjustment and Verification Procedures 15. . . . . . . . . . . . . . .
Equipment Required 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preparation 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remove the Top Cover 17. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Prepare the Equipment 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjustment Locations 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Procedures 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HF Adjust 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Compensate the Probe 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rise Time and Aberrations 21. . . . . . . . . . . . . . . . . . . . . . . . .
Output Zero Adjust 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC Attenuation Accuracy 22. . . . . . . . . . . . . . . . . . . . . . . . . .
Rise Time Check 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reset DIP Switches and Install Cover 26. . . . . . . . . . . . . . . . .
Test Record 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Table of Contents
Maintenance 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing TekProbe Interface Pins 32. . . . . . . . . . . . . . . . . . . . . .
Removing and Replacing the TekProbe Interface Collar 33. . . . .
Removing and Replacing the Cable Assembly 34. . . . . . . . . . . . .
Replaceable Parts 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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P6339A Instruction Manual

List of Figures

Figure 1: SMK4 Micro KlipChip adapter 4. . . . . . . . . . . . . . .
Figure 2: Probe compensation waveforms 7. . . . . . . . . . . . . .
Figure 3: Ground lead effects 8. . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4: Voltage derating, typical 1 1. . . . . . . . . . . . . . . . . . . . .
Figure 5: Input impedance, typical 12. . . . . . . . . . . . . . . . . . . .
Figure 6: Input phase, typical 12. . . . . . . . . . . . . . . . . . . . . . . . .
Figure 7: Location adjustments and DIP switches 18. . . . . . . .
Figure 8: Setup for probe compensation and high fr equency
adjustment 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table of Contents
Figure 9: Probe compensation waveforms 20. . . . . . . . . . . . . .
Figure 10: Setup for rise time and aberrations 21. . . . . . . . . . .
Figure 11: Setup for the output offset adjustment 22. . . . . . . .
Figure 12: Setup for DC attenuation accuracy 23. . . . . . . . . . .
Figure 13: Setup for rise time check 25. . . . . . . . . . . . . . . . . . .
Figure 14: Replacing TekProbe interface pins 32. . . . . . . . . . .
Figure 15: Replacing the TekProbe collar 33. . . . . . . . . . . . . . .
Figure 16: Replacing the cable assembly 34. . . . . . . . . . . . . . . .
Figure 17: P6339A replaceable parts and standard
accessories 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Table of Contents

List of Tables

Table 1: Features and accessories 2. . . . . . . . . . . . . . . . . . . . .
Table 2: Electrical specifications 9. . . . . . . . . . . . . . . . . . . . . .
Table 3: Environmental characteristics 11. . . . . . . . . . . . . . . .
Table 4: Physical characteristics 13. . . . . . . . . . . . . . . . . . . . . .
Table 5: Certifications and compliances 13. . . . . . . . . . . . . . . .
Table 6: Test equipment 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 7: DIP switch/attenuation settings 19. . . . . . . . . . . . . . .
Table 8: Input voltages for DC attenuation accuracy
adjustment 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 9: Settings for rise time check 26. . . . . . . . . . . . . . . . . . .
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P6339A 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.
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.
P6339A Instruction Manual
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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:
CAUTION
Refer to Manual
WARNING
High Voltage
Double
Insulated
Protective Ground
(Earth) Terminal
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P6339A 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.
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.
P6339A Instruction Manual
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Service Safety Summary
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P6339A Instruction Manual

Contacting Tektronix

Phone 1-800-833-9200*
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
Service support
Technical support
* This phone number is toll free in North America. After office
hours, please leave a voice mail message. Outside North America, contact a T ektronix sales office or distributor; see the Tektronix web site for a list of offices.
1-800-833-9200, select option 1*
1-800-833-9200, select option 2*
Email: techsupport@tektronix.com 1-800-833-9200, select option 3*
1-503-627-2400 6:00 a.m. – 5:00 p.m. Pacific time
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Contacting Tektronix
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P6339A Instruction Manual

Getting Started

The P6339A Buffered Passive Probe is specifically designed for Tektronix oscilloscopes such as the TDS 794D. Each high-bandwidth input of these oscilloscopes has a fixed 50 W impedance and a TekProbe III interface. To allow a broader range of measurement applications, the P6339A probe passively attenuates and then actively buffers the signal to match the 50 W input impedance.
Key probe specifications include the following:
H 500 MHz bandwidth H 8 pF input capacitance H 10 MW passive input (10X)
The oscilloscope settings control the following parameters of the buffered probe output:
H Attenuation and gain H AC/DC coupling H Bandwidth limit H DC offset
For a complete list of specifications, refer to page 9.

Features and Accessories

Table 1 illustrates the user features of the P6339A Buffered Passive Probe and standard accessories. In addition to those items shown, the standard accessories also include the following:
H Adjustment tool for probe compensation H Accessory pouch H Instructions (this manual)
P6339A Instruction Manual
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Getting Started
Table 1: Features and accessories
Feature/Accessory Description Applications/Notes
Marker bands Color codes the probe to the
oscilloscope input when more than one probe is in use. Clip one band around the strain relief of the probe head and the matching band on the strain relief of the probe compensation box.
Ground collar
Ground lead
Ridged probe cover
Short ground lead
Retractable hook tip
SMT KlipChip and ground lead
Connects the probe ground to a ground reference close to the signal source.
To install, slip the ground collar onto the probe head then screw the ridged probe cover down over the probe tip. Insert the socket end of the ground lead into the hole of the ground collar.
Connects the probe tip to wires and component leads for hands­free measurement.
NOTE. For a solid connection, firmly push and twist the hook tip onto the probe tip before using.
Connects the probe ground to small or hard to reach ground reference points. The ground lead also connects to a variety of optional accessories.
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P6339A Instruction Manual
T able 1: Features and accessories (cont.)
Feature/Accessory Applications/NotesDescription
Getting Started
Ground lead with insulated alligator clip
SureFoot probe tip set
Guard Keeps fingers away from the
Guard
Connects the probe ground to ground reference.
Provides fault-free probing of SMD packages that have lead spacings of 0.50 mm/20 mil (red), 0.65 mm/25 mil (blue), or 50 mil (orange).
probe tip for protection against electric shock.
WARNING. To avoid electric shock when using the probe, keep fingers behind the guard on the probe body.
Ordering information for replaceable parts and standard accessories begins on page 35.
P6339A Instruction Manual
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Getting Started

Optional Accessories

Recommended optional accessories include the SMK4 shown in Figure 1. This adapter enables connections to very small leads.
Figure 1: SMK4 Micro KlipChip adapter
The P6339A probe is fully compatible with the entire line of 3.5 mm (compact) accessories.
Ordering information for optional accessories begins on page 35.

Functional Check

Use the functional check procedures in this section to verify basic probe operation with Tektronix oscilloscopes such as the TDS 794D. Because this is a functional check, no tolerances are given for the measured values.
NOTE. To verify warranted specifications and to adjust the probe, qualified service personnel may use the adjustment and verification procedures that begin on page 15.
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P6339A Instruction Manual
Getting Started

T ekProbe Communication

This procedure verifies the operation of the TekProbe III interface.
1. Turn on the oscilloscope. Wait for the power up self test to
complete.
2. Disconnect all cables or probes from the inputs.
3. Press the Autoset button.
4. Press the CH 1 button.
5. Use the Vertical Scale knob to set the vertical scale factor to
100 mV/div.
6. Press the Vertical Menu button.
7. Attach the probe to the CH 1 input.
8. Select the Coupling menu.
9. Verify that AC and DC coupling and GND are selectable by
switching between them.
10.Verify that the channel 1 scale factor is selectable from 10mV/div
to 100V/div.
11. Verify that the Bandwidth is selectable between Full, 20MHz and
150MHz (2nd button along lower bezel).

DC Offset

This procedure verifies that the oscilloscope can compensate for the DC offset of each volts/division range of the the P6339A probe.
1. With the probe attached to channel 1, set the oscilloscope to the
lowest volts/division setting (10 mV/div).
2. Set the input coupling to GND and set the ground reference to
center screen.
3. Install a retractable hook tip and ground lead on the probe head.
4. Short the input of the probe to probe ground by connecting a
short jumper from the hook tip to the ground lead.
5. Set the coupling to DC.
P6339A Instruction Manual
5
Getting Started
6. Check that the ground reference for each volts per division range

DC Gain and Attenuation

This procedure verifies the correct gain and attenuation of each volts/division range of the probe.
1. With the probe attached to channel 1, set the oscilloscope to the
2. Connect the output of a standard amplitude calibration generator
3. Set the oscilloscope to DC coupling.
4. For each volts per division range from 10mV/div to 100V/div,
from 10mV/div to 100V/div stays near center screen.
lowest volts/division setting (10 mV/div).
or calibrated DC source to the input of the probe.
adjust the generator or DC source to display four or five divisions of vertical deflection and check that the measured value of the input agrees with the output of the generator or DC source.
This completes the functional check procedure.
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P6339A Instruction Manual

Operating Basics

To obtain the best performance from the P6339A probe, compensate the probe as needed, observe the maximum input voltage and make appropriate probe connections.

Probe Compensation

Due to variations in oscilloscope input characteristics, probe low-frequency compensation may need adjustment after moving the probe from one oscilloscope to another . If a 1 kHz calibrated square wave displayed at 1 ms/division shows significant differences between the leading and trailing edges, perform the following steps to optimize low-frequency compensation.
1. Connect the probe to the calibration signal on the oscilloscope
front panel.
2. Press AUTOSET or otherwise adjust your digitizing oscilloscope
to display a meaningful waveform.
3. Adjust the trimmer in the probe (accessible through the
compensation box) until you see a perfectly flat-top square wave on the display. See Figure 2.
Undercompensated Overcompensated Properly compensated
Figure 2: Probe compensation waveforms
P6339A Instruction Manual
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Operating Basics

Maximum Input Voltage

Estimate the RMS voltage of a pulse signal before measurement. The combination of pulse width, duty factor, and DC level determine the RMS signal voltage. Depending on the application or “installation category, this voltage must not exceed the ratings listed in the Specifications section on page 10.
WARNING. To avoid electric shock when using the probe, do not touch the metallic portions of the probe head while connected to a voltage source.

High-Frequency Probe Connections

To minimize inductive effects that cause ringing at high frequencies, keep all signal and ground leads as short as possible (see Figure 3). Accessories are included with the probe that provide convenient means to make short connections (see page 2).
100
90
10
0%
Short ground lead
3“ Ground lead
Figure 3: Ground lead effects
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P6339A Instruction Manual

Specifications

All specifications in Table 2 apply to the probe only unless marked as system. The system specifications apply when the P6339A probe is operated with a TDS 794D in an environment that does not exceed the limits described in Table 3 on page 11.
All specifications are warranted unless marked as typical. The n symbol indicates warranted specifications that have checks in the Adjustment Procedures section.
T able 2: Electrical specifications
System input resistance, typical System input capacitance, typical 8.0 pF at 1 kHz (DC coupled), see Figure 5 System bandwidth, calculated DC to 500 MHz at 50 mV/div System dynamic range, typical ± 10 divisions at each V/div setting except
System offset range, typical ± 10 divisions System output zero, typical ± 0.6 division or less displayed on screen
Aberrations, typical (probe only) +8%, –6% at 10 mV/div
10 MW at DC (DC coupled), see Figure 5
50 V and 100 V/div
after probe cal
+16%, –6% at 20 mV, 50 mV, 0.1 V, and
0.2 V/div +18%, –6% at 0.5 V/div +21%, –6% at 1 V/div +22%, –6% at 2 V/div +24%, –6% at 5 V/div
1
+35%, –17% at 10 V/div
AC coupling, typical lower bandwidth < 10 Hz
P6339A Instruction Manual
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Specifications
T able 2: Electrical specifications (cont.)
n
Output zero (probe only)
± 20 mV at 10 mV/div, ± 10 mV at 20 mV/div, ± 5 mV at all other V/div settings
n DC attenuation accuracy (probe only)
± 2.0 % at 10 mV, 20 mV, 50 mV, 0.1 V,
0.2 V, 0.5 V, 1 V, 2 V, 5 V, 10 V, 20 V, and 50 V/div
± 4.0 % at 100 V/div
n Rise time (probe only)
1.4 ns at 10 mV/div 875 ps at 20 mV/div 700 ps at 50 mV, 0.1 V, 0.2 V, 0.5 V, 1 V,
2 V, and 5 V/div 870 ps at 10 V/div
Required output termination
50 W Bandwidth limit frequencies (–3 dB), typical 20 MHz and 150 MHz Time delay, typical 7.8 ns ± 1 ns Maximum rated input voltage, probe tip to
earth ground
Overvoltage category I:
600 V
(DC + peak AC)
PK
Overvoltage category II:
300 V
RMS
Category III:
150 V
RMS
Voltage derating, typical See Figure 4 Input impedance, typical See Figure 5 Input phase, typical See Figure 6
1
Full dynamic range at 50 V and 100 V/div would exceed the safety rating of the probe.
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P6339A Instruction Manual
Specifications
T able 3: Environmental characteristics
Temperature Operating:
+10_ C to + 50_ C (+50_ F to +122_ F) Nonoperating
–22_ C to +60_ C (–7.6_ F to +140_ F)
Humidity Operating and Nonoperating:
Five cycles (120 hr total) at 80% to 85% relative humidity
Altitude, operating < 2000 m (< 6,562 ft), rated ranges
2000 to 5000 m (6,562 to 16,404 ft) voltage ratings reduced to 300 V CAT I and 150 V CAT II
Altitude, non-operating < 15,240 meters (50,000 ft)
Category I, 420 V
and 600 V
RMS
(DC + peak AC
)
Category II
Category III
600V 400V
300V 200V
100V
AC
RMS
Voltage
10V
0
Figure 4: Voltage derating, typical
P6339A Instruction Manual
5M 50M
10M 100M1M
Frequency (Hz)
1G
11
Specifications
10 MW
1MW
100 kW
10 kW
1 kW
100 W
1 k100
10 k 100 k 1 M 10 M 100 M
Figure 5: Input impedance, typical
0_
-10_
-20_
-30_
-40_
-50_
-60_
-70_
-80_
1 G
Frequency (Hz)
-90_ 100
Figure 6: Input phase, typical
12
10 k 100 k 1 M 10 M 100 M1 k10
Frequency (Hz)
1 G
P6339A Instruction Manual
Specifications
Table 4 lists the physical characteristics of the P6339A probe.
T able 4: Physical characteristics
Weight, typical Shipping weight: 515 g (1.2 lbs) including
shipping materials Net weight: 185 g (0.41 lbs), probe only
Cable length, typical 1.3 m (51.18 in)
Table 5 lists the certifications and compliances.
T able 5: Certifications and compliances
EC Declaration of Conformity – Low Voltage
U.S. Nationally Recognized Testing Laboratory Listing
Canadian Certification
Compliance was demonstrated to the following specification as listed in the Official Journal of the European Union:
Low Voltage Directive 73/23/EEC, amended by 93/69/EEC EN 61010-2-031:1994
Particular requirements for hand-held probe assemblies for electrical measurement and test equipment.
UL3111-1
Standard for electrical measuring and test equipment.
IEC61010-2-031:1994
Particular requirements for hand-held probe assemblies for electrical measurement and test equipment.
CAN/CSA C22.2 No. 1010.1
Safety requirements for electrical equipment for measurement, control, and laboratory use.
CAN/CSA C22.2 No. 1010.2.031:1994
Particular requirements for hand-held probe assemblies for electrical measurement and test equipment.
Additional Compliance
IEC61010-1/A2
P6339A Instruction Manual
Safety requirements for electrical equipment for measurement, control, and laboratory use.
13
Specifications
T able 5: Certifications and compliances (cont.)
Installation (Overvoltage) Category
Pollution Degree A measure of the contaminates that could occur in the environment
Terminals on this product may have different installation (overvoltage) category designations. The installation categories are:
CAT III Distribution-level mains (usually permanently connected).
Equipment at this level is typically in a fixed industrial location.
CAT II Local-level mains (wall sockets). Equipment at this level
includes appliances, portable tools, and similar products. Equipment is usually cord-connected.
CAT I Secondary (signal level) or battery operated circuits of
electronic equipment.
around and within a product. Typically the internal environment inside a product is considered to be the same as the external. Products should be used only in the environment for which they are rated.
Pollution Degree 2
Normally only dry, nonconductive pollution occurs. Occasionally a temporary conductivity that is caused by condensation must be expected. This location is a typical office/home environment. Temporary condensation occurs only when the product is out of service.
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P6339A Instruction Manual
WARNING
The following servicing instructions are for use only by qualified personnel. To avoid injury, do not perform any servicing other than that stated in the operating instructions unless you are qualified to do so. Refer to all safety summaries before performing any service.

Adjustment and Verification Procedures

Use the following procedures to adjust and verify the P6339A Buffered Passive Probe to warranted specifications. Before beginning these procedures, photocopy the test record on pages 27 through 29 and use it to record test results. The recommended adjustment and verification interval is one year .
These procedures adjust and/or verify the following:
H High frequency (adjust) H Probe compensation (adjust) H Rise time and aberrations (adjust) H Output zero (adjust and/or verify) H DC attenuation accuracy (adjust and verify) H Rise time (verify)
WARNING. These procedures are for use by qualified service personnel only .
P6339A Instruction Manual
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Adjustment and Verification Procedures

Equipment Required

Table 6 lists the equipment required to perform these procedures. The types and quantities of connectors may vary depending on the specific equipment you use.
Table 6: Test equipment
Description Minimum requirements Example product
Oscilloscope TekProbe interface,
267 ps risetime
Probe power supply Compatible with the Tek-
Probe interface
Calibrated DC voltage source
Digital multimeter DC Accuracy 0.1%,
High amplitude pulse generator
Male BNC to probe tip adapter
Male BNC to 50 W probe tip adapter
BNC cable Dual-male-banana-to-
female BNC adapter
Adjustable from 0 V to 400 V with accuracy
0.05%.
400 mV range
0 to 50 V pulse, 250 ps rise time
Straight-thru 013-0226-00
50 W nominal
50 W, 1%, precision As per description 103-0090-00
Tektronix TDS694C
Tektronix Type 1103
Wavetek 9100
Fluke 87 or equivalent
Picosecond Pulse Labs 2700C or 2700B
013-0227-00
012-0482-00
16
Precision inline BNC terminator
Probe tip shorting connector
In-line attenuator
50 W ± 0.1%
As per description
50 W, 10X
011-0129-00
011-0059-02
P6339A Instruction Manual

Preparation

Prepare the probe for adjustment as follows:

Remove the Top Cover

1. Remove the four screws that attach the top cover to the
compensation box.
2. Remove the top cover .

Prepare the Equipment

1. Connect the male BNC to probe tip adapter (013-0226-00) to the
input of the probe.
2. Attach the probe to the 1103 TekProbe Power Supply.
Adjustment and Verification Procedures
3. If necessary, set the line selector to the correct voltage.
4. Turn on the 1103 power supply.
5. Set the offset button to the off position (button not illuminated).
6. Allow at least 20 minutes for the equipment to warm up.
NOTE. Ambient temperature must be within 20_ C to 30_ C when you adjust the probe.
P6339A Instruction Manual
17
Adjustment and Verification Procedures

Adjustment Locations

Figure 7 shows the locations of the adjustments and the DIP switches (S1) that manually set the probe attenuation (gain) range.
R1 C4
C7
R3
S1
X1
X10
A1
A0
S1
G3
G2
G1
G0
HF
1 0
HF AdjustLF COMP
10m 20m 50m .2 .5 100
10m 20m 50m .2 .5 100
1251020
TP2
50
GAIN
Offset, X1
DIP switches shown in
1 position
Offset, X10
Figure 7: Location adjustments and DIP switches
18
Offset, X100
P6339A Instruction Manual
Because some of these procedures use the TekProbe 1103 Power Supply, there is no automatic control of the probe attenuation. You must manually set the required attenuation for these procedures according to Table 7.
Table 7: DIP switch/attenuation settings
Adjustment and Verification Procedures
Atten. setting
10 mV 0 1 0 1 0 0 0 1 1 1.0000 20 mV 0 0 1 0 2 0.5000 50 mV
0.2 V 0 1 0 0 10 0.1000
0.5 V 0 1 0 1 25 0.04000 1 V 1 0 0 0 0 0 1 1 50 0.02000 2 V 0 1 0 0 100 0.01000 5 V 0 1 0 1 250 0.00400 10 V 1 0 1 0 0 0 1 1 500 0.00200 20 V 0 1 0 0 1000 0.00100 50 V 0 1 0 1 2500 0.000400 100 V 1 1 0 1 5000 0.000200
1
X10 X1 A1 A0
1
G3 G2 G1 G0
0 0 1 1 5 0.2000
During normal operation, the probe attenuation for 50 mV/div is the same
System
atten.
System gain
as 0.1 V/div and the oscilloscope automatically displays the correct waveform. With the 1103, there are no adjustments for 0.1 V/div.

Procedures

Perform the adjustment and verification procedures in order .

HF Adjust

1. Setup the equipment as shown in Figure 8 on page 20. (For this
procedure, the probe tip does not have to be connected to the probe compensation signal.)
P6339A Instruction Manual
19
Adjustment and Verification Procedures
2. Measure the voltage on TP2 with a DMM and set the HF Adjust
potentiometer until the voltage at TP2 is –0.50 ± 0.05 VDC.

Compensate the Probe

1. Set up the equipment as shown in Figure 8.
2. With the P6339A probe installed on the 1103 power supply, set
all the DIP switches to the “0” position. See Figure 7 on page 18.
3. Using Table 7 on page 19, set the DIP switches for 50 mV/div.
CH 1
output
1103
Test oscilloscope
CH 1 input
Signal
P6339A
Probe compensation
([0.5 V
, 1 kHz square wave)
p-p
Gnd
50 W BNC cable
Figure 8: Setup for probe compensation and high frequency adjustment
4. Press AUTOSET or otherwise adjust your digitizing oscilloscope
to display a meaningful waveform.
5. Adjust the LF COMP trimmer, C7 (Figure 7 on page 18), until
you see a perfectly flat-top square wave on the display (Figure 9).
CH 1 input
Under compensated Overcompensated Properly compensated
Figure 9: Probe compensation waveforms
20
P6339A Instruction Manual
Adjustment and Verification Procedures

Rise Time and Aberrations

1. Set up the equipment as shown in Figure 10.
2. Set all the DIP switches to the 1 position.
3. Set the oscilloscope vertical to 50 mV.
4. Set the pulse generator to 250 mV.
5. Adjust R1 and R3 for a flat response with minimum rise time
(700 ps).
6. Adjust C4 for minimum aberrations in the first 3 ns.
TDS 694C Digitizing Oscilloscope
High Amplitude Pulse Generator
Figure 10: Setup for rise time and aberrations
P6339A Instruction Manual
BNC-to-probe tip adapter 013-0227-00
P6339A
21
Adjustment and Verification Procedures

Output Zero Adjust

1. Connect the probe as shown in Figure 11.
Digital multimeter
BNC cable
+
Female BNC-to­male banana adapter
50 W precision terminator
Short
Figure 11: Setup for the output offset adjustment
50 W
P6339A
CH 1
output
CH 1 input
1103
22
2. Set the DMM to the mV range.
3. Set all the DIP switches to the 0 position.
4. Set the DIP switches for an attenuation of 10 mV as shown in
Table 7.
5. If necessary, adjust the offset potentiometer marked “10m for a
DMM reading of 0.0 mV ± 1 mV.
6. Set the DIP switches for each attenuation range listed in Table 7
and adjust the corresponding offset potentiometer for a DMM reading of 0.0 mV ± 0.5 mV.
P6339A Instruction Manual
Adjustment and Verification Procedures

DC Attenuation Accuracy

1. Connect the probe as shown in Figure 12.
Digital multimeter
+
Female BNC-to-male banana adapter
50 W precision terminator
DC Source
CH 1
output
50 W
BNC cable
BNC-to-probe tip adapter 013-0226-00
P6339A
CH 1 input
1103
Figure 12: Setup for DC attenuation accuracy
2. Set the DMM to the mV range.
3. Set all the DIP switches to the 0 position.
4. Set the DIP switches for an attenuation of 10 mV and adjust the
gain potentiometer marked 10m (top row, left) for the best compromise that produces an output reading on the DMM within the limits listed in Table 8 on page 24 for both positive and negative voltage inputs.
P6339A Instruction Manual
23
Adjustment and Verification Procedures
5. In similar fashion, apply the voltages for each subsequent
attenuation range listed in Table 8 and check the DMM reading. Adjust the appropriate potentiometer for each range. Note that some ranges do not have an adjustment.
Table 8: Input voltages for DC attenuation accuracy adjustment
Attenuation setting DCV in DMM reading
10mV (0 1 0 1 0 0 0 1)
20mV (0 1 0 1 0 0 1 0)
50mV (0 1 0 1 0 0 1 1)
0.2 V (0 1 0 1 0 1 0 0)
0.5 V (0 1 0 1 0 1 0 1)
1 V1 (1 0 0 0 0 0 1 1)
1
2 V (1 0 0 0 0 1 0 0)
+100.00 mV 98.0 mV to 102.0 mV –100.00 mV +200.00 mV 98.0 mV to 102.0 mV –200.00 mV +500.00 mV 98.0 mV to 102.0 mV –500.00 mV +1.000 V 98.0 mV to 102.0 mV –1.000 V +2.500 V 98.0 mV to 102.0 mV –2.500 V +5.000 V 98.0 mV to 102.0 mV –5.000 V +10.00 V 98.0 mV to 102.0 mV
10.00 V
102.0 mV to 98.0 mV
102.0 mV to 98.0 mV
102.0 mV to 98.0 mV
102.0 mV to 98.0 mV
102.0 mV to 98.0 mV
102.0 mV to 98.0 mV
102.0 mV to 98.0 mV
24
1
5 V (1 0 0 0 0 1 0 1)
10 V1 (1 0 1 0 0 0 1 1)
20 V1 (1 0 1 0 0 1 0 0)
+25.00 V 98.0 mV to 102.0 mV –25.00 V +50.00 V 98.0 mV to 102.0 mV –50.00 V +100.0 V 98.0 mV to 102.0 mV
100.0 V 102.0 mV to 98.0 mV
102.0 mV to 98.0 mV
102.0 mV to 98.0 mV
P6339A Instruction Manual
Adjustment and Verification Procedures
T able 8: Input voltages for DC attenuation accuracy adjustment (cont.)
Attenuation setting DMM readingDCV in
1
50 V
+250.0 V 98.0 mV to 102.0 mV
(1 0 1 0 0 1 0 1)
250.0 V
102.0 mV to 98.0 mV
100 V
+400.0 V 76.8 mV to 83.2 mV
(1 0 1 0 1 1 0 1)
–400.0 V
1
These ranges do not have adjustments

Rise Time Check

1. Connect the probe as shown in Figure 13.
TDS 694C Digitizing Oscilloscope
–83.2 mV to –76.8 mV
High Amplitude Pulse Generator
Figure 13: Setup for rise time check
2. Set all the DIP switches to the “1 position.
P6339A Instruction Manual
BNC-to-probe tip adapter 013-0227-00
P6339A
25
Adjustment and Verification Procedures
3. Set the pulse generator and check the rise for each attenuation
setting listed in Table 9.
Table 9: Settings for rise time check
TDS694C attenuation setting
10 mV 50 mV 1.4 ns 20 mV 100 mV 875 ps 50 mV 250 mV 700 ps
0.2 V 1 V 700 ps
0.5 V 2.5 V 700 ps
Pulse generator Rise time
1 V 5 V 700 ps 2 V 10 V 700 ps 5 V 25 V 700 ps 10 V 50 V 870 ps

Reset DIP Switches and Install Cover

1. Return all DIP switches to the “1 position as shown in Figure 7
on page 18.
2. Place the top cover back onto the compensation box and secure
the cover with the four screws removed earlier .
This completes the adjustment and verification procedures.
26
P6339A Instruction Manual

Test Record

Photocopy the following test record and use it to record test results.
P6339A Test Record, Page 1 of 3
Serial Number
Oscilloscope tests Low limit Test result High limit
Output zero
Adjustment and Verification Procedures
Procedure performed by Date
1
10 mV –20 mV +20 mV 20 mV –10 mV +10 mV 50 mV –5 mV +5 mV
0.2 V –5 mV +5 mV 5 V –5 mV +5 mV 1 V –5 mV +5 mV 2 V –5 mV +5 mV 5 V –5 mV +5 mV 10 V –5 mV +5 mV 20 V –5 mV +5 mV 50 V –5 mV +5 mV 100 V –5 mV +5 mV
1
The high and low limits for output zero represent the acceptable limits over time. When making the adjustments, set the 10 mV/div adjustment to 0.00 mV ± 1.0 mV and all other adjustments to 0.00 mV ± 0.5 mV.
P6339A Instruction Manual
27
Adjustment and Verification Procedures
P6339A Test Record, Page 2 of 3
Oscilloscope tests Low limit Test result High limit
DC 10 mV attenuation accuracy
(±100 mV in) 20 mV
(±200 mV in) 50 mV
(±500 mV in)
0.2 V (±1.000 V in)
0.5 V (±2.500 V in)
1 V (±100 mV in)
2 V (±200 mV in)
+98.0 mV +102.0 mV –102.0 mV –98.0 mV +98.0 mV +102.0 mV –102.0 mV –98.0 mV +98.0 mV +102.0 mV –102.0 mV –98.0 mV +98.0 mV +102.0 mV –102.0 mV –98.0 mV +98.0 mV +102.0 mV –102.0 mV –98.0 mV +98.0 mV +102.0 mV –102.0 mV –98.0 mV +98.0 mV +102.0 mV –102.0 mV –98.0 mV
28
5 V (±500 mV in)
10 V (±1.000 V in)
20 V (±2.500 V in)
50 V (±250.0 V in)
100 V (±400.0 V in)
+98.0 mV +102.0 mV –102.0 mV –98.0 mV +98.0 mV +102.0 mV –102.0 mV –98.0 mV +98.0 mV +102.0 mV –102.0 mV –98.0 mV +98.0 mV +102.0 mV –102.0 mV –98.0 mV +76.8 mV +83.2 mV –83.2 mV –76.8 mV
P6339A Instruction Manual
Adjustment and Verification Procedures
P6339A Test Record Page 3 of 3
Oscilloscope tests Low limit Test result High limit
Rise time
10 mV N/A 1.4 ns 20 mV N/A 875 ps 50 mV N/A 700 ps
0.2 V N/A 700 ps
0.5 V N/A 700 ps 1 V N/A 700 ps 2 V N/A 700 ps 5 V N/A 700 ps 10 V N/A 870 ps
NOTE. Return all DIP switches to the “1” position before installing the top cover on the compensation box.
P6339A Instruction Manual
29
Adjustment and Verification Procedures
30
P6339A Instruction Manual

Maintenance

The procedures in this section describe how to maintain and repair the P6339A Buffered Passive Probe.

Cleaning

Remove dirt with a soft cloth dampened in a mild detergent and water solution or isopropyl alcohol.
CAUTION. To avoid damaging the probe, use only a mild detergent and water solution or isopropyl alcohol; do not use any other solvents or abrasive cleaners. Do not immerse the probe.
P6339A Instruction Manual
31
Maintenance

Replacing TekProbe Interface Pins

1. To remove the interface pin, grasp the pin with a pair of
needle-nose pliers and gently pull the pin out. See Figure 14.
2. To replace the pin, insert the new pin into the socket and press it
in against a hard surface.
32
Figure 14: Replacing TekProbe interface pins
P6339A Instruction Manual
Maintenance

Removing and Replacing the TekProbe Interface Collar

1. To remove the collar, firmly pull the collar off by hand.
2. To replace the collar, align the smaller group of pins with the
smaller of the two holes in the interface collar and align the tabs with the slots. Gently press the two pieces together . See Figure 15.
Tab
Slot
Figure 15: Replacing the TekProbe collar
P6339A Instruction Manual
33
Maintenance

Removing and Replacing the Cable Assembly

1. Unscrew the retaining nut and slide it back on the cable.
2. Firmly grasp the cable close to the threaded housing and pull it
straight out.
3. Remove the nut from the old cable and place it onto the new
cable.
4. Insert the new cable into the housing until it snaps into place.
5. Tighten the retaining nut (approximately 30 inch-lbs).
Cable
Retaining nut
Figure 16: Replacing the cable assembly
Threading housing
34
P6339A Instruction Manual

Replaceable Parts

1
2
14
15
16
17
13
18
5
6
3
4
7
101112
9
8
Figure 17: P6339A replaceable parts and standard accessories
P6339A Instruction Manual
35
Replaceable Parts
Accessories
80009 See Optional
2 EA 0.50 mm/20 mil (red), 0.65 mm/25 mil (blue), and
Qty Name & description Mfr. code Mfr. part number
Serial no.
discont’d
Serial no.
effective
Tektronix
part number
Fig. &
index
number
171 206048500 1 COMP BOX ASSY:P6339A 80009 206048500
2 174097800 1 CABLE ASSY,RF:65 OHM COAX PER FT ,1.3M 060D9 174–097800
3 196330500 1 LEAD,ELECTRICAL:22 AWG,6.0 L,W/CLIP 060D9 196330500
4 206044100 1 PROBE TIP ASSY:10X,8.0PF,9M OHM, 80009 206–044100
P6339A and replaceable parts and accessories
–5 204–1049–00 1 BODY SHELL:TIP COVER TK2565 204–1049–00
1 ADAPTER,SMD KIT
Accessories
6 013010707 1 TIP,PROBE:MINIATURE/COMPACT SIZE TK2565 013–010707
7 See Optional
50 mil (orange)
8 206036400 1 TIP,PROBE:MICROCKT TEST,0.05 CTR 80009 206–036400
9 ––––––––––– 1 POUCH (not replaceable)
10 003143303 1 SCREWDRIVER:ADJUSTMENT TOOL,METAL TIP TK2565 003143303
11 016063300 1 MARKER SET,CA:2 EA VARIOUS COLORS 80009 016–063300
12 196311302 1 LEAD,ELECTRICAL:STRD,22 AWG,6.0 L,8N 060D9 196311302
13 195424000 1 LEAD,ELECTRICAL:0.025 DIA,COPPER,2.3 L 060D9 195424000
14 343100301 1 COLLAR,GND:P6130 TK2565 343100301
15 205019101 1 SHELL,ELEC CONN:BNC,ABS,DOVE GRAY 80009 205019101
16 131362702 1 CONTACT,ELEC:SPRING LOADED,GOLD PLATED TK2565 131–362702
17 211000100 1 SCREW,MACHINE:256 X 0.25,PNH,STL CD PL,POZ 93907 ORDER BY DESCRIP
36 P6339A Instructions
Mfr. part numberMfr. codeName & descriptionQty
Replaceable Parts
Serial no.
discontd
Serial no.
effective
Tektronix
part number
OPTIONAL ACCESSORIES
071–0178–01 1 MANUAL,TECH:INSTRUCTIONS,P6339A TK2548 071–0178–01
SF202A 12 INSULATOR: ADAPTER, SMD, BLUE, 0.65 mm/25 mil 80009 SF202A
SF203A 12 INSULATOR: ADAPTER, SMD, RED, 0.50 mm/20 mil 80009 SF203A
Fig. &
index
number
P6339A and replaceable parts and accessories (Cont.)
–18 200–3018–00 1 COVER,CABLE NIP:COMP BOX 0J260 ORDER BY DESCRIP
17–8 SF201A 12 INSULATOR: ADAPTER, SMD, ORANGE, 50 MIL 80009 SF201A
P6339A Instructions
37
Replaceable Parts
VANCOUVER, W A 98661
20
BEAVER T ON, OR 970764200
M/S 16–207
ROCKFORD, IL 611045181
BEAVER T ON, OR 97077–0001
PO BOX 500
516 18TH AVE
Manufacturer Address City, state, zip code
93907 CAMCAR DIV OF TEXTRON INC ATTN: ALICIA SANFORD
TK2548 XEROX CORPORATION 14181 SW MILLIKAN WAY BEAVERTON, OR 97005
Mfr.
Manufacturers cross index
code
060D9 UNITREK CORPORATION 3000 COLUMBIA HOUSE BLVD, SUITE 1
0J260 COMTEK MANUFACTURING OF OREGON P O BOX 4200
80009 TEKTRONIX INC 14150 SW KARL BRAUN DR
TK2565 VISION PLASTICS INC 26000 SW PARKW AY CENTER DRIVE WILSONVILLE, OR 97070
38 P6339A Instructions
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