Tektronix P6136 Manual de usuario

Instruction Manual

P6136

10X Passive Probe

for 2400 Series Oscilloscopes

070-6025-04

*P070602504*

070602504

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

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 97077-1000

TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.

WARRANTY

Tektronix warrants that the products that it manufactures and sells will be free from defects in materials and workmanship

for a period of one (1) year from the date of 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.

Contacting Tektronix

Product

support For questions about using Tektronix measurement products, call

toll free in North America:

1-800-833–9200

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 Tektronix offers extended warranty and calibration programs as options on many

products. Contact your local Tektronix distributor or sales office.

For a listing of worldwide service centers, visit our web site.

For other

information In North America:

1-800–833–9200

An operator can direct your call.

To write us

Web site

Tektronix, Inc.

P.O. Box 500

Beaverton, OR 97077-1000

USA

www.tektronix.com

P6136 Instruction Manual i

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.

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.

The common terminal is at ground potential. Do not connect the common

terminal to elevated voltages.

Do not apply a potential to any terminal, including the common terminal, that

exceeds the maximum rating of that terminal.

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/DampConditions.

Do Not Operate in an Explosive Atmosphere.

Keep Product Surfaces Clean and Dry.

Terms in this Manual. The following terms may appear in this manual:

WARNING. Warning statements identify conditions or practices that could result

in injury or loss of life.

To Avoid Fire or

Personal Injury

Symbols and Terms

ii P6136 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 to this

product unless another person capable of rendering first aid and resuscitation is

present.

P6136 Instruction Manual 1

Operating Basics

The P6136 probe is a 350 MHz, 10X, 1.3 meter, passive voltage probe designed

specifically for use with Tektronix 2400 Series oscilloscopes having bandwidths

greater than 150 MHz. The P6136 comes standard with the Tektronix subminia-

ture-size probe tip/hybrid assembly and is fully compatible with the Tektronix

Subminiature family of accessories. The Compact series probe tip/hybrid

assembly comes standard on the P6136 Option 25. The Compact probe

tip/hybrid assembly is slightly larger in diameter than the Subminiature series,

offering greater durability and ruggedness in those environments and applica-

tions where required. The compact tip is not compatible with the Subminiature

series except for the ground collar and the low-inductance (2.3 inch) ground lead.

The P6136 Option 25 is supplied with a complement of accessories; optional

accessories are available for both tip sizes.

You may convert both probe tip assemblies to Tektronix Miniature series probe

tips by using the subminiature/compact-to-miniature probe-tip adapter (See the

optional accessory lists for each probes in the Replaceable Parts section

beginning on page 14).

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.

Probe Compensation

Due to variations in oscilloscope input characteristics, probe low-frequency

compensation should be checked and adjusted after moving the probe from one

oscilloscope input to another. To adjust the probe low-frequency compensation,

apply a 1 kHz square wave (such as an oscilloscope calibrator output) to the

probe tip. Using a nonconductive low-reactance alightment tool, adjust the probe

compensation capacitor through the hole in the compensation box to obtain the

squarest waveform at the front corner edge. See page 9 for complete low- and

high-frequency compensation adjustment procedures.

Operating Basics

2P6136 Instruction Manual

Inductive Effects of Probe Grounding

Ground lead inductance can significantly reduce the performance of a probe. As

shown in Figure 1, the ground lead inserts inductance into the signal path

forming a series-resonant circuit with the probe input capacitance Cin and

Rsource as damping. This forms a resonant circuit with f0+1B(2pLC

Ǹ).

Probe Cin

Typ. 10.8 pF

Probe Rin

10MW

Ground lead

inductance

Rsource

Vsource

Figure 1: Circuit model: test point and probe input

A six-inch ground lead has approximately 150 nH of inductance, which produces

an f0of approximately 130 MHz within the frequency range of the instrument.

This greatly degrades rise time, bandwidth, and transient accuracy as shown in

Figure 2.

Figure 2: Typical step response with six-inch ground lead

For best results, ensure that ground-lead inductance is at a minimum. Two

methods for doing so are the Low-Inductance Ground Lead and the Klipkit.

Operating Basics

P6136 Instruction Manual 3

The low-inductance ground lead provided with all Tektronix P6136 probes

allows for a substantial reduction in ground-lead inductance, approximately

32 nH instead of 150 nH.

To install the low-inductance ground lead, refer to Figure 3 and perform the

following steps:

1. Unscrew and remove the ribbed-tip shell and slide off the ground collar with

ground lead.

2. Slip on the low-inductance ground lead collar (1) and reinstall the ribbed

plastic tip cover.

3. Install the low-inductance lead (2) from the accessory pack.

Figure 3: Low-inductance ground lead

The optional Klipkit connector (see the optional accessory lists beginning on

page 14) provides a hands-free signal and ground connection to an integrated

circuit with up to 16 pins. The Klipkit ground is acquired by inserting a

connecting pin (included) into the Klipkit at the proper pin location. The probe

body (with ribbed-tip cover removed) then makes a signal connection when

inserted into other pin locations.

Screw-in probe tip

Ground lead

Klipkit

Subminiature only

Figure 4: Klipkit connector

Low-Inductance Ground

Lead

Klipkit Connector

Operating Basics

4P6136 Instruction Manual

Grounding the Probe

Connect the probe to the instrument and connect the ground lead to ground

before making any measurement. 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 5 below.

Hand contact area

Finger guard

Figure 5: Probe finger guard and hand contact area

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