Tektronix 7B10 Manual de usuario

'HBktfDnix

COMMITTED TO EXCELLENCE

PLEASE CHECK FOR CHANGE INFORMATION

AT THE REAR OF THIS MANUAL.

7B10

TIME BASE

OPERATORS

INSTRUCTION MANUAL

Tektronix, Inc.

P.O. Box 500

Beaverton, Oregon 97077 Serial Number

070-2317-00

Prodlict Group 42 First Printing SEP 1978

Revised JUN 1985

Contents of this publication may not be reproduced in any

form \without the \written permission of Tektronix, Inc.

Products of Tektronix, Inc. and its subsidiaries are covered

by U.S. and foreign patents and/or pending patents.

TEKTRONIX, TEK, SCOPE-MOBILE, and are

registered trademarks of Tektronix, Inc. TELEQUIPMENT

is aregistered trademark of Tektronix U.K. Limited.

Printed in U.S. A. Specification and price change privileges

are reserved.

INSTRUMENT SERIAL NUMBERS

Each instrument has aserial number on apanel insert, tag,

or stamped on the chassis. The first number or letter

designates the country of manufacture. The last five digits

of the serial number are assigned sequentially and are

unique to each instrument. Those manufactured in the

United States have six unique digits. The country of

manufacture is identified as follo\ws;

BOOOOOO Tektronix, Inc., Beaverton, Oregon, USA

100000 Tektronix Guernsey, Ltd., Channel Islands

200000 Tektronix United Kingdom, Ltd., London

300000 Sony/Tektronix, Japan

700000 Tektronix Holland, NV, Heerenveen,

The Netherlands

7B10 Operators

TABLE OF CONTENTS

PAGE

LIST OF ILLUSTRATIONS j|

LIST OF TABLES jj

OPERATORS SAFETY SUMMARY ijj

SECTION 1GENERAL INFORMATION

INTRODUCTION 1_1

OPERATORS MANUAL M

INSTRUCTION MANUAL 1-1

INSTALLATION M

INSTRUMENT PACKAGING 1-1

SPECIFICATION 1-2

STANDARD ACCESSORIES 1-4

SECTION 2OPERATING INSTRUCTIONS

CONTROLS, CONNECTORS AND INDICATORS 2-1

OPERATORS CHECKOUT 2-1

SETUP PROCEDURE 2-1

SWEEP FUNCTIONS 2-1

TRIGGERING FUNCTIONS 2-4

DETAILED OPERATING INFORMATION 2-4

TRIGGERING SWITCH LOGIC 2-4

TRIGGERING MODE 2-4

TRIGGERING COUPLING 2-5

TRIGGERING SOURCE 2-5

TRIGGERING SLOPE 2-7

TRIGGERING LEVEL 2-7

HORIZONTAL SWEEP RATES 2-7

TIME MEASUREMENTS 2-7

SWEEP MAGNIFICATION 2-8

VARIABLE HOLD OFF 2-8

MAINFRAME OPERATING MODES 2-8

APPLICATIONS 2-8

TIME-INTERVAL MEASUREMENTS 2-8

PERIOD AND FREQUENCY MEASUREMENTS 2-8

RISE-TIME AND FALL-TIME MEASUREMENTS 2-9

PULSE WIDTH MEASUREMENTS 2-10

DELAYED-SWEEP MEASUREMENTS 2-11

SECTION 3INSTRUMENT OPTIONS

CHANGE INFORMATION

7B10 Operators

LIST OF ILLUSTRATIONS

FIGURE

NO. page

Frontis-

piece 7B10 Features iv

1-1 Location of release latch 1-1

27B10 dimensional drawing 1-4

1Front-panel controls, connectors, and

indicators 2-2

2-2 Effect of LEVEL control and SLOPE switch on

crt display 2-6

2-3 Area of graticule used for most accurate time

measurements 2-7

2-4 Operation of sweep magnifier 2-8

2-5 Measuring the period and determing the

frequency of adisplayed waveform 2-9

2-6 Measuring the rise time and fall time of a

displayed waveform 2-10

2-7 Measuring the pulse width of adisplayed

waveform 2-10

LIST OF TABLES

TABLE

NO- PAGE

1-1 Electrical Characteristics 1-2

1-2 Environmental Characteristics 1-4

1-3 Physical Characteristics 1-4

7B10 Operators

OPERATORS SAFETY SUMMARY

The following general safety information applies to all operators and service personnel. Specific warnings and cautions

will be found throughout the manual where they apply and should be followed in each instance.

WARNING statements identify conditions or practices which could result in personal injury or loss of life.

CAUTION statements identify conditions or practices which could result in damage to the equipment or other property.

WARNING

GROUND THE INSTRUMENT

To reduce electrical-shock hazard, the mainframe (oscilloscope) chassis must be properly grounded. Refer to

the mainframe manual for grounding information.

DO NOT REMOVE INSTRUMENT COVERS

To avoid electric-shock hazard, operating personnel must not remove the protective instrument covers

Component replacement and internal adjustments must be made by qualified service personnel only.

DO NOT OPERATE IN EXPLOSIVE ATMOSPHERE

To avoid explosion, do not operate this instrument in an explosive atmosphere unless it has been certified for

such operation.

sCAUTION

PREVENT INSTRUMENT DAMAGE

Plug-in units should not be installed or removed without first turning the instrument power off, to prevent

instrument damage.

7B10 Operators

2416-1

7BIO Features

The 7B10 Time-Base unit provides calibrated sweep rates from .2 seconds to 2nanoseconds and triggering to 1

gigahertz for 7100-, 77CX3-, 7800-, and 79CXD-series oscilloscopes. AX10 Magnifier increases each sweep rate by a

factor of 10 and aVARIABLE TIME/DIV control provides continuously variable sweep rates between calibrated steps.

Variable hold off and alpha-numeric readout are provided. Also, when operating in the AUTO TRIGGERING MODE, a

bright baseline trace is displayed in the absence of atrigger signal. The 7B10 can be operated as an independent time

base or as adelayed-sweep unit with acompanion delaying time-base unit.

Section 1—7B10 Operators

GENERAL INFORMATION

INTRODUCTION

OPERATORS MANUAL

The Operators Manual contains information necessary to

effectively operate the 7B10 Time Base and is divided

into three sections: Section 1provides abasic description

of the 7B10 with instrument specifications and

accessories, section 2contains operating information for

the instrument, Instrument Option information is located

in section 3of the manual.

INSTRUCTION MANUAL

The Instruction Manual provides both operating and

servicing information for the 7B10 Time Base. The

Instruction Manual is divided into nine sections.

Operating information is covered in the first two sections;

servicing information for use by qualified service

personnel is contained in the remaining seven sections

of the manual. Schematic diagrams are located at the

rear of the manual and can be unfolded for reference

while reading other parts of the manual. The reference

designators and symbols used on the schematics are

defined on the first page of the Diagrams and Circuit

Board Illustrations section. All abbreviations used in this

manual, with the exception of the parts list and

schematic diagrams, comply with the American National

Institute Y1. 1-1 972 publication. The parts lists are

computer printouts and use computer-supplied

abbreviations. Instrument Option information is located

in section 6of the Instruction Manual.

INSTALLATION

The time-base unit is designed to operate in the

horizontal plug-in compartment of the mainframe. This

instrument can also be installed in avertical plug-in

compartment to provide avertical sweep on the crt.

However, when used in this manner, there are no

internal triggering or retrace blanking provisions, and the

unit may not meet specifications.

To install the unit in aplug-in compartment, push it in

until it fits firmly into the compartment. The front panel

of the unit should be flush with the front panel of the

mainframe. Even though the gain of the mainframe is

standardized, the sweep calibration of the unit should be

checked when installed. The procedure for checking the

unit is given under Sweep Functions in the Operators

Checkout procedure in section 2.

To remove the unit, pull the release latch (see Fig. 1-1 )to

disengage the unit from the mainframe, and pull it out of

the plug-in compartment.

INSTRUMENT PACKAGING

If this instrument is to be shipped for long distances by

commercial means of transportation, it is recommended

that it be repackaged in the original manner for

maximum protection. The original shipping carton can be

saved and used for this purpose. If more information is

needed, contact your local Tektronix Field Office or

representative.

Fig. 1-1. Location of release latch.

1-1

General Information—7B10 Operators

SPECIFICATION

This instrument will meet the electrical characteristics listed in Table 1-1, following complete adjustment. The following

electrical characteristics are valid over the stated environmental range for instruments calibrated at an ambient

temperature of +20° to +30° C, and after atwenty-minute warmup unless otherwise noted.

TABLE 1-1

Electrical Characteristics

Characteristics Performance Requirement

SWEEP GENERATOR

Sweep Rates

Calibrated Range 0.2 s/div to 2ns/div in 25 steps, XI 0Magnifier extends

fastest calibrated sweep rate to 0.2 ns/div.

Variable Range Continuously variable uncalibrated sweep rate to at

least 2.5 times the calibrated sweep rate setting.

Sweep Accuracy^ with 7104, 7900 and

7800 Series Mainframes

+15° to +35° C

0.2 s/div to 10 ns/div

5ns/div and 2ns/div

Measured over center 8displayed divisions. ^SWP CAL

is adjusted at 1ms/div within the +20° to +30° Crange.

UNMAG MAG XI

4%^

0° to +50° CDerate +15° to +35° Caccuracy by additional 1%.

Excluded Portions of Sweep

7104

7800, 7900 Series

None.

First 5ns.

Sweep Length At least 10.2 div.

MAG Registration 0.5 div or less from graticule center when changing

from MAG XI 0to MAG XI.

Position Range

POSITION Controls fully cw Start of sweep must be to right of graticule center at

1ms/div.

POSITION Controls fully ccw End of sweep must be left of graticule center at 1ms/div.

’Some mainframes limit fastest calibrated sweep rate.

^200 ps/div is measured over any 5divisions withir. the center 8divisions.

1-2 REV MAY 1981

General Information—7B10 Operators

TABLE 1-1 (CONT.)

Electrical Characteristics

Characteristic Performance Requirement

TRIGGERING

Trigger Sensitivity for Repetitive Signals Triggering Frequency Minimum Triggering

Range® Signal Required

Coupling Internal External

AC 30 Hz to 250 MHz 0.5 div 50 mV

250 MHz to 1GHz 1.5 div 150 mV

AC LF REJ'’ 50 kHz to 250 MHz 0.5 div 50 mV

250 MHz to 1GHz 1.5 div 150 mV

AC HF REJ 30 Hz to 30 kHz 0.5 div 50 mV

DC® DC to 250 MHz 0.5 div 50 mV

250 MHz to 1GHz 1.5 div 150 mV

Single Sweep Same as for Repetitive Triggering,

Internal Trigger Jitter 30 ps or less at 1GHz.

Operating in HF SYNC MODE

AC, AC LF REJ, or DC 250 MHz to 1GHz-0.3 div. Internal

75 mV External.

External Trigger Input

LEVEL RANGE At least ±3,5 V(checked on 1kHz sine wave).

Maximum Safe Input

1-Megohm Input 250 V(dc plus peak ac).

50-0hm Input 1Watt average.

Input Rand C

1-Megohm Input 1MQ within 5%, 20 pF within 10%.

50-0hm 50 Qwithin 2%.

Trigger Holdoff Time

Minimum Holdoff Setting

0.2 s/div to 50 ms/div 40 ms, or less

20 ms/div to 2^(s/div 2times TIME/DIV setting, or less

1yus/div to 2ns/div 2.0 IIS, or less

Maximum Holdoff Setting

0.2 s/div to 50 ms/div 400 ms, or greater

20 ms/div to 2yus/div 20 times TIME/DIV setting, or greater

1/fs/div to 0.5 yus/div 20.0 IIS, or greater

0.2 yUs/div to 2ns/div 6.0 ns, or greater

=The triggering frequency ranges given here are limited to the -3 dB frequency of the oscilloscope vertical system when operating in the Internal

mode.

^Will not trigger on sine waves at or below 60 Hz when amplitudes are less than 8divisions Internal or 3volts External.

The triggering frequency range for DC COUPLING applies to frequencies above 30 Hz when operating in the AUTO TRIGGERING MODE.

REV MAY 1981 1-3

General Information—7B10 Operators

TABLE 1-2

Environmental Characteristics

Refer to the Specification section of the associated mainframe manual.

TABLE 1-3

Physical Characteristics

Characteristic Information

Net Weight Approximately 2.6 pounds (1.2 kilogram).

Dimensions See Figure 1-2, dimensional drawing.

STANDARD ACCESSORIES

Operators Manual

Instruction Manual

OVERALL DIMENSIONS

(MEASURED AT MAXIMUM POINTS)

NOTE: TOP FIGURES IN INCHES

LOWER FIGURES IN CENTIMETERS

c1985-5

Fig. 1-2. 7B10 dimensional drawing.

1-4

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