Tektronix 7B10 User manual

'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

Copyright -1978 Tektronix, Inc. All rights reserved.
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
1-
27B10 dimensional drawing 1-4
2-
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.
V
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.
!V

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
0
2%
3%
3%
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