Tektronix AMT75 Bedienungsanleitung

Form 080/01

Complimentary Reference Material

This PDF has been made available as a complimentary service for you to assist in

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Disclaimer:

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Instructions

AMT75

75 to 50 Ohm Impedance Adapter

070-9479-00

There are no current European directives that

apply to this product. This product provides cable

and test lead connections to a test object of

electronic measuring and test equipment.

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.

WARRANTY

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

workmanship for a period of one (1) year from the date of shipment. If a product proves defective during this

warranty period, Tektronix, at its option, either will repair the defective product without charge for parts and labor,

or will provide a replacement in exchange for the defective product.

In order to obtain service under this warranty, Customer must notify Tektronix of the defect before the expiration

of the warranty period and make suitable arrangements for the performance of service. Customer shall be

responsible for packaging and shipping the defective product to the service center designated by Tektronix, with

shipping charges prepaid. Tektronix shall pay for the return of the product to Customer if the shipment is to a

location within the country in which the Tektronix service center is located. Customer shall be responsible for

paying all shipping charges, duties, taxes, and any other charges for products returned to any other locations.

This warranty shall not apply to any defect, failure or damage caused by improper use or improper or inadequate

maintenance and care. Tektronix shall not be obligated to furnish service under this warranty a) to repair damage

resulting from attempts by personnel other than Tektronix representatives to install, repair or service the product;

b) to repair damage resulting from improper use or connection to incompatible equipment; c) to repair any

damage or malfunction caused by the use of non-Tektronix supplies; or d) to service a product that has been

modified or integrated with other products when the effect of such modification or integration increases the time

or difficulty of servicing the product.

THIS WARRANTY IS GIVEN BY TEKTRONIX IN LIEU OF ANY OTHER WARRANTIES, EXPRESS

OR IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED WARRANTIES OF

MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. TEKTRONIX’

RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND

EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY.

TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT, SPECIAL,

INCIDENTAL, OR CONSEQUENTIAL DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR

THE VENDOR HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.

Service Assurance

If you have not already purchased Service Assurance for this product, you may do so at any time during the product’s

warranty period. Service Assurance provides Repair Protection and Calibration Services to meet your needs.

Repair Protection extends priority repair services beyond the product’s warranty period; you may purchase up to three

years of Repair Protection.

Calibration Services provide annual calibration of your product, standards compliance and required audit documentation,

recall assurance, and reminder notification of scheduled calibration. Coverage begins upon registration; you may purchase

up to five years of Calibration Services.

Service Assurance Advantages

HPriced well below the cost of a single repair or calibration

HAvoid delays for service by eliminating the need for separate purchase authorizations from your company

HEliminates unexpected service expenses

For Information and Ordering

For more information or to order Service Assurance, contact your Tektronix representative and provide the information

below. Service Assurance may not be available in locations outside the United States of America.

Name VISA or Master Card number and expiration

Company date or purchase order number

Address Repair Protection (1,2, or 3 years)

City, State, Postal code Calibration Services (1,2,3,4, or 5 years)

Country Instrument model and serial number

Phone Instrument purchase date

AMT75 Impedance Adapter Instructions 1

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.

Ground the Product. This product is indirectly grounded through the grounding

conductor of the mainframe power cord. To avoid electric shock, the grounding

conductor must be connected to earth ground. Before making connections to the

input or output terminals of the product, ensure that the product is properly

grounded.

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 SuspectedFailures. 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. 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.

To Avoid Fire or

Personal Injury

Symbols and Terms

2AMT75 Impedance Adapter Instructions

Contacting Tektronix

Product

Support For application-oriented questions about a Tektronix measure-

ment 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

AMT75 Impedance Adapter Instructions 3

AMT75 Impedance Adapter

The AMT75 (Figure 1) is a 75 to 50 Wimpedance adapter with low VSWR

(voltage standing-wave ratio). The adapter allows you to connect video and

communication signals from a 75 Wcoax cable to the 50 Winput of an oscillo-

scope while minimizing aberrations and reflections. The AMT75 adapter fully

complies with ANSI T1.102 and ITU-T G.703

50 WTekProbe output

75 Winput

Figure 1: AMT75 Adapter

CAUTION. The AMT75 adapter contains components that are sensitive to

electrostatic discharge (ESD). To avoid electrostatic damage, observe ESD

precautions when handling the adapter.

AMT75 Impedance Adapter

4AMT75 Impedance Adapter Instructions

Oscilloscope Connections

As shown in Figure 2a, the output of the AMT75 adapter connects directly to the

TekProbe II interface on Tektronix TDS Series oscilloscopes. With the addition

of optional accessories, the AMT75 adapter connects to any instrument with a

50 WBNC or 50 WSMA input. The shell of the input on all oscilloscopes must

connect to earth ground.

When you connect the adapter to instruments with the TekProbe II interface, the

instrument automatically adjusts the scale factor and sets the oscilloscope input

impedance to 50 W.

NOTE. TDS 400 and TDS 400A series oscilloscopes always interpret the

attenuation of the AFTDS adapter as B10. The attenuation of the adapter is

actually B5. When you use this adapter on these oscilloscopes, divide the

measurement (or scale factor) by 2 to obtain the correct value.

When you connect the adapter to instruments that do not have the TekProbe II

interface, make the settings and calculate the amplitude as follows:

HSet the oscilloscope input impedance to 50 Wor use an external 50 W

termination.

HCorrect your measurements for the 5X attenuation factor of the AMT75

adapter.

Displayed Amplitude ×5 = Actual Amplitude

Input Signal Connections

The female BNC input of the AMT75 adapter accepts a male BNC connector.

The signal input cable (source) must be 75 W. See Figure 2b.

CAUTION. To avoid damaging the 75 Winput connector, use accessories that are

specifically designed for 75 Wconnections. Using 50 Wconnectors on the 75 W

input can damage the 75 Wconnector and degrade the VSWR of the AMT75

adapter.

Instruments with

TekProbe II

Instruments without

TekProbe II

AMT75 Impedance Adapter

AMT75 Impedance Adapter Instructions 5

D-1

D-2

DS-3

DS-4

STS-1

STS-3/STM-1

E-2

E-3

E-4

b) 75 WInput signal connections

50 SMA

input

50 TekProbeoutput

75 BNC Input

75 

Impedance Standard Data Rate (Mb/s)

270

143

44.736

139.264

51.84

155.51

8.448

34.368

139.264

Connection to Tektronix TDS Series

(with the TekProbe II Interface)

TekProbe input

DITS

template

testsignal

BNCtoSMA 50 terminator

50 BNC

input 1 MBNC

input

50 BNC Male to BNC Female

AMT75

a) 50 WOscilloscope connections

Connectionstootheroscilloscopes

(without the TekProbe II Interface)

75 BNC Male to BNC Male

Figure 2: Connecting the AMT75 adapter

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