Tektronix 7B53A User manual

PLEASE CHECK
FOR
CHANCE INFORMATION
ATTHE
REAR OF THIS
MANUAL .
IN
A/7N
A
TI
COMMITTED
TO
EXCELLENCE
N
MANIA .
Tektronix, Inc .
P .O .
Box 500
Beaverton, Oregon

97077
070-1342-01
Product

First
Printing SEP
1980
Group 42

Revised
MAY 1988

Copyright (~)
1972, 1980 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

V'
.

are
registered
trademarks of
Tektronix, Inc . TELEQUIPMENT
is a
registered trademark
of Tektronix U .K . Limited .
Printed
in U .S .A . Specification
and price change privileges
are
reserved .
INSTRUMENT SERIAL
NUMBERS
Each instrument has a
serial numberon a
panel 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 follows :
13000000

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

Section 1

SPECIFICATION ........ . .........
Section 2

OPERATING INSTRUCTIONS . .......
Controls and Connectors .... .......
Operating Checkout ...... . .
.......
General Operating Instructions . .
.....
Applications . . . . .............. . ...
Repackaging for Shipment ...... ....
REV DEC 198 2
LIST OF ILLUSTRATIONS

....... . . ...........
LIST OF TABLES

. .............. . . ..........
OPERATORS SAFETY SUMMARY

... . .........
SERVICE SAFETY SUMMARY ....... . .........
The
remaining portion of this Table of Contents lists the
servicing instructions
. 7hese servicing instructions are for
use by qualified
personnel only . To avoid electrical shock,
do notperform any
servicing other than that called out in the
operating instructions
unless qualified to do so .
Section 3
7B53A/7B53AN
Section 5

MAINTENANCE .......... .
. . . .... 5-1
Preventive Maintenance .... ..
...... 5-1
Troubleshooting . . . ............. . . .
5-2
Corrective Maintenance
......... . . . 5-4
Page Page
iii
Section
3 THEORY OF OPERATION
(cont'd)
iv
Delayed Trigger
Generator
v
(SN B209999 & Below)
............. 3-12
vii
Delayed Sweep
Generator
..........
3-12
1-1
Horizontal Preamp ......... ........
3-17
Readout Switching ........
. ....... 3-18
2-1
2-1
Section
4
CALIBRATION .
............. . ..... 4-1
2-3
Test Equipment Required
......... . . 4-1
2-6
PART 1 PERFORMANCE
CHECK . . . . 4-6
2-13
Trigger System Check ............. .
4-7
2-20
Horizontal System Check
........... 4-13
PART 2 ADJUSTMENT ............
4-20
Trigger System Adjustment
.......... 4-21
Horizontal System Adjustment
....... 4-24
THEORY
OF OPERATION . . . . . 3-1 . . . . . . . .
Section 6OPTIONS
.......... ... ...........
Simplified Block
Diagram ...... . . .... 3-1
Circuit Operation ..... . ...... . . .... 3-3
Main Trigger
Preamp . ........ . ..... 3-4
Section 7
REPLACEABLE ELECTRICAL
PARTS
Main Trigger
Generator (SN B210000
& Up7B53A Only) ..
...... . . ....... 3-4
Main Trigger
Generator (SN B209999
Section 8 DIAGRAMS
AND CIRCUIT BOARD
& Below) ........ . ........ .
....... 3-7
DESCRIPTIONS
Main Sweep Generator
... . . . ...... . 3-9
Delayed Trigger Generator
(SN B210000 &
Up7B53A Only) . ... . 3-12
Section 9 REPLACEABLE
MECHANICAL
PARTS

Fig .
No .
@ JUN 1980
Fig .
Page No .
7B53A/7B53AN
Typical delay time
error measurement . . .

4-16
Typical Delay
Time Error Figures
.
....
.

4-17
Allowable Delay Time
Error . ......... 4-17
Typical CRT display when checking
sweep
length .
....
.....
. . .......... . ...
4-25
Typical
CRTdisplayforadjwstmentof Dly'd
Sweep Start and Dly'd Sweep
Stop . .... 4-26
Location
of pins on interface connector
. . 5-3
Cam
Switch Removal ...............
5-7
illustrations in Section 8 are located
near their
ociated diagrams
on the foldout page .
Electrode configuration
for
semiconductors in the
instrument
.
Location
of circuit boards in the
7B53A/7B54AN
.
Partial
A1--Interface circuit board
component locator
(SN B090000 and up) .
Partial A1--Interface circuit
board
component locator (SN B089999
and
below) .
A2---Source
Switch circuit board
component locator .
A3--Coupling Switch circuit
board
component locator .
Partial
A4----Trigger circuit board
component
locator 7B53A only
(SN B210000 and up) .
Partial
A4---Trigger circuit board
component
locator (SN B209999 and
below) .
Partial
A6--Sweep circuit board
component
locator (SN B090000 and
up) .
Partial
A6---Sweep circuit board
component
locator (SN B089999 and
below) .
A5-Mode Switch circuit board .
Partial A4---Trigger circuit board
component
locator 7B53A only
(SN B210000 and
up)
.
A7--Delayed Trigger Switch
circuit board
component locator .
Partial
A4--Trigger circuit board
component
locator (SN B209999 and
below
Page
4-2
4-3
4-4
4-5
4-6
5-1
5-2
The
ass8-1
8-2
8-3
8-4
8-5
8-6
8-7
8-8
8-9
8-10
8-11
8-12
8-13
8-14
.
7B53A/7B53AN Dual
Time Base ........
viii
2-1
Location of release latch ............
2-1
2-2 Front-panel
controls and connectors
. . . . 2-2
2-3
Frequency range of
each COUPLING
switch
position . . ................. 2-7
2-4 Effect
of LEVEL control and
SLOPE switch
on CRT display
. . . .... ..........
. .
2-9
2-5
Composite
Time/Division switch .......
2-10
2-6
Area of graticule used for
accurate time
measurements ....................
2-11
2-7 Operation
of Sweep Magnifier ........
2-11
2-8 (A) Intensified
Sweep display ; (B)
Delayed
Sweep display
. . . . ...... . . ........
2-12
2-9
Typical Mixed
Sweep display (DELAY TIME
MULT
dial set to 3 .55)
. . ............
2-12
2-10 DELAY "I"IME MULT
dial . Reading shown
3 .55 . . . . . . .....................
2-12
2-11 Measuring the time
duration between
points on a waveform
...............
2-15
2-12
Measuring risetime ................ 2-16
2-13
Measuring time
difference using delayed
sweep ....... . . . . . . . ...... .
. . . . . 2-17
2-14 Using delayed
sweep for magnification . .
2-18
2-15
Displaying a complex
signal using delayed
sweep . . . . ......................
2-19
2-16
Measuring pulse jitter ..............
2-20
3-1
7B53A/7B53AN Simplified Block Diagram
. 3-2
3-2 Trigger Preamp
and Input Switching
Block
Diagram . . ......................
3-5
3-3
Main Trigger Generator
Block Diagram
(SN B210000 and up 7B53A
only) . . . . . . 3-6
3-4 Main Trigger
Generator Block
Diagram
(SN B209999
and below) . . . . . . ....
. . 3-8
3-5 M
in Sweep Generator Block
Diagram . . 3-10
3-6 Delayed Trigger
Generator Block
Diagram
(SN B210000 and
up 7B53A only) . .....
3-13
3-7
Delayed Trigger Generator
Block Diagram
(SN B209999
and below) . ...........
3-14
3-8
Delayed Sweep
Generator Block Diagram .
3-15
3-9
Horizontal Preamp Block
Diagram . .... 3-17
4-1 Location
of Delayed Gate Outand
Variable
Selector
multi-pin connectors
. . ....... 4-2

7853A/71353AN
Fig .
No .
8-15
8-16
8-17
8-18
8-19
8-20
iv
Partial A6---Sweep
circuit
board
component locator (SNB090000and up) .
Partial A6--Sweep circuit board
component locator (SNB089999and
below) .
Partial
A1--Interface circuit
board (7B53A
only) component locator .
Partial A1--Interface circuit board
(7B53AN only) component locator .
A8--Readout circuit board (7B53A only)
component locator .
Partial A6--Sweep circuit board
component locator (SNB090000and up) .
Table
No .
Fig .
No .
8-21
8-22
8-23
8-24
8-25
Page
Partial A6---Sweep circuit board
component locator (SN B089999and
below) .
Partial A6--Sweep circuit board
component
locator
(SN B090000and up) .
Location of adjustments in the
7B53A/7B53AN (SN B209999 and below) .
Location of adjustments in the 7B53A
(SNB210000and up) .
Location of adjustments in the
7B53A/7B53AN .
C? JUN 1980
1-1
Electrical .......................
1-1
1-2
Environmental ................... 1-6
1-3 Physical .......................
1-6
2-1 Deflection
Factor of the X Signal ...... 2-13
2-2 Risetime Measurements
............ 2-16
4-1
Test Equipment . ................. 4-3
4-2 Main
Sweep Timing . .......
. . .....
4-13
4-3 Delayed
Sweep Timing . . . .......... 4-14
4-4 Main Sweep Magnifier
Accuracy . . . . . . 4-15
4-5
Delayed Sweep Magnifier Accuracy
.... 4-15
5-1 Relative
Susceptibility to Static Discharge
Damage ........................
5-2

POWER SOURCE
REV JAN
1985
The
general safety information in this
part of the summary
is for both operating
and servicing personnel . Specific
warnings and
cautions will be found
throughout the manual
where they apply, but may
not appear in this summary .
IN THIS MANUAL
CAUTION statements identify conditions
or practices that
could result in damage
to the equipment or other property .
WARNING statements identify conditions
or practices that
could result in personal
injury or loss of life .
AS MARKED
ON EQUIPMENT
CAUTION indicates
a personal injury hazard
not immediately
accessible as one reads the
marking, or a hazard to
property including the
equipment itself .
DANGER indicates a personal
injury hazard immediately
accessible
as one reads the marking .
IN THIS
MANUAL
Static-Sensitive Devices
.
This symbol
indicates where applicable
cautionary or other information
is to be found .
AS MARKED ON EQUIPMENT
DANGER----High
voltage .
Protective ground
(earth) terminal .
ATTENTION-----refer
to manual .
GROUNDING THE
PRODUCT
TERMS
SYMBOLS
WARNINGS
This
product is intended to
operate in a mainframe
connected to a power
source that will not apply more than
250 volts
rms between
the supply conductors
or between either
supply conductor and
ground . A protective ground connection by
way of
the grounding conductor in
the mainframe power
cord is essential for
safe operation .
This
product is grounded through
the grounding conductor
of the
mainframe power cord . To avoid electrical
shock, plug
the
mainframe power cord into a
properly wired receptacle
before
connecting to the product input or output
terminals . A
protective ground connection by
way of the grounding conductor
in the
mainframe power cord is essential for
safe
operation .

7B53A/7B53AN
DANGER ARISING FROM
LOSS OF GROUND
Upon loss of the protective-ground connection, all
accessible conductive parts (including knobs and controls that may
appear to be insulating), can render an electric
shock .
DO NOT OPERATE IN EXPLOSIVE ATMOSPHERES
To avoid explosion, do not operate this product in an
atmosphere of explosive gases unless it has been specifically
certified for such operation .
DO
NOT
OPERATE PLUG-IN UNIT WITHOUT COVERS
To avoid personal injury, do not operate this product
without covers or panels installed . Do not apply power to the plug-in
unit via a plug-in extender .

POWER SOURCE
@ JUN 1980
VICIN
DO NOT SERVICE ALONE
FOR
QUALIFIED SERVICE PERSONNEL ONLY
Refer also to the preceding
Operators Safety Summary
Do not perform internal service or adjustment of this
product unless another person capable of rendering first aid and
resuscitation is present .
USE CARE WHEN
SERVICING WITH POWER ON
Dangerous voltages exist at several points in this
product . To avoid personal injury, do not touch exposed
connections
and components while power is on .
Disconnect power before removing protective panels,
soldering, or replacing components .
711353A/711353AN
This product is intended to operate in a mainframe
connected to a power source that will not apply more than 250 volts
rms between the supply
conductors or between either supply
conductor and ground . A protective ground connection by
way of the grounding
conductor in the mainframe power cord is
essential for safe operation .

The 7B53A/7B53AN Dual Time Base .

Characteristics
MAIN
SWEEP
Sweep Rates
Over Center Eight
Divisions
50
ms/div to 0 .5 ps/div
0 .2 ps/div
to 0 .05 ps/div
Over any 2 div
portion within
center
eight div (all sweep
rates)
Variable
Sweep Rates
REVD JUN
1980
Table 1-1
NO TE
The 7B53A
and 7S53AN are
electrically identical
except that only the
7853A is compatible with
the
alphanumeric readout
system provided for
the 7000-series
oscilloscopes .
This instrument will
meet the electrical
characteristics listed under
Performance
Requirement in Table 1-1,
following
complete calibration . The following
electrical characteristics
apply over an
ambient temperature
range of 0° C to
+50 0 C,
except as otherwise
indicated .
Warmup time for given accuracy
is 20 minutes .
ELECTRICAL
Performance Requirement
0 .05 ps/div
to 5 s/div in
25 calibrated
Measured in
7000-Series Oscilloscopes
.
+15'C to ~I-35°
C___

0° C to '4-50°
C
Unmag
Me9
unmag
Meg .
3% 4%
Within
Within
4%
5%
Within
7%
Continuously
variable between
cali-
brated sweep
rates . Extends sweep
rate
to at least 12 .5 s/div .
Supplemental
Information
Variable
to at least 2 .5 :1 .
VARIABLE
control
internally switchable between
variable main
sweep rates, variable
delayed sweep rates,
and variable
main
sweep holdoff .
Hold-off time
may be varied at
least
2 :1
by front-panel
VARIABLE control
when
Variable Selector
connector
(P140) is
connected for variable
holdoff .
Section 1---7B53A/7B53AN