Tektronix 2465 User manual

Tektronix, Inc.
P.O. Box 500
Beaverton, Oregon 97077
070-3832-00
Product Group 38
COMMITTED TO EXCELLENCE
PLEASE CHECK FOR CHANGE INFORMATION
AT THE REAR OF THIS MANUAL.
OSCILLOSCOPE
OPERATORS
INSTRUCTION MANUAL
Serial Number
First Printing SEP 1982
Revised AUG 1985

Copyright @ 1982 Tektronix, Inc. All rights reserved.
Contents of this publication may not be reproduced in any
form without the written permission of Tektronix, Inc.
Productsof 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, Ins. TELEQU
l PMENT
is a registeredtrademark of Tektronix U.K. Limited.
Printed in U.S.A. Specificationand price change privileges
are reserved.
INSTRUMENT SERIAL NUMBERS
Each instrumenthas a serial number on 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
manufactureis identified as follows:
BOO0000 Tektronix, Inc., Beaverton, Oregon, USA
1 00000 Tektronix Guernsey, Ltd., Channel Islands
200000 Tektronix United Kingdom, Ltd., London
300000 SonyITektronix, Japan
700000 Tektronix Holland,
NV, Heerenveen,
The Netherlands

Certificateof the Manufacturer/lmporter
We hereby certify that the
2465 OSCILLOSCOPE
AND ALL INSTALLEDOPTIONS
complies with the RF Interference Suppression requirements of Amtsbl.-Vfg 104611984.
The German Postal Service was notifiedthat the equipment is being marketed.
The German Postal Service has the right to re-test the series and to verify that it complies.
TEKTRONIX
Bescheinigungdes Herstellersllmporteurs
Hiermit wird bescheinigt, daA derldieldas
2465 OSCILLOSCOPE
AND ALL INSTALLEDOPTIONS
in ~bereinstimmungmit den Bestimmungender Amtsblatt-Verfugiing lO46Il984 funkentstort ist.
Der Deutschen Bundespost wurde das lnverkehrbringen dieses Gerates angezeigt und die
Berechtigung zur ijberprufung der Serie auf Einhaltender Bestimmungeneingeraumt.
TEKTRONIX
NOTICE to the userloperator:
The German Postal Service requires that Systems assembled by the operatorluser of this
instrument must also comply with Postal Regulation, Vfg. 104611984,Par.
2, Sect. 1.
HlNWElS fijr den BenutzerIBetreiber:
Die vom Betreiber zusammengestellte Anlage, innerhalb derer dies Gerat eingesazt wird, mu8
ebenfalls den Voraussetzungen nach Par. 2, Ziff. 1 der Vfg. 104611984 genugen.
NOTICE to the userloperator:
The German Postal Service requires that this equipment, when used in a test setup, may only be
operated if the requirementsof Postal Regulation,Vfg. 104611984, Par. 2, Sect. 1.7.1 are complied
with.
HlNWElS fijr den BenutzerIBetreiber:
Dies Gerat darf in MerSaufbauten nur betrieben werden, wenn die Voraussetzungen des Par.
2,
Ziff. 1.7.1 der Vfg. 104611984 eingehalten werden.

This Document was scanned from the original
Tektronix Service Manual
For enquiries about high quality technical manuals
[email protected]
This Document is a complete Scan from the original
Tektronix manual
For enquiries about our complete
High quality line of technical Manuals in PDF
mailto : [email protected]

2465 Operators
TABLE OF CONTENTS
Page Page
.................
LISTOF ILLUSTRATIONS ii SECTION 5 OPERATOR'S CHECKS AND
........................
LIST OF TABLES ii
...
............
OPERATORS SAFETY SUMMARY 111
SECTION 1 SPECIFICATION
INTRODUCTION ............. 1-1
PERFORMANCE CONDITIONS
... 1-1
SECTION 2
SECTION
3
SECTION 4
PREPARATION FOR USE
SAFETY ................... 2-1
LINE VOLTAGE SELECTION
.... 2-1
LINE FUSE
................. 2-1
POWER CORD
............... 2-1
INSTRUMENTCOOLING
....... 2-1
START.UP
.................. 2-2
REPACKAGING FORSHIPMENT
.. 2-2
CONTROLS. CONNECTORS.
AND INDICATORS
POWER AND DISPLAY ......... 3-1
VERTICAL
................. 3-2
HORIZONTAL AND DELTA
MEASUREMENT
............. 3-4
..................
TRIGGER 3-7
REARPANEL
............... 3-9
.......... READOUT DISPLAY 3-11
OPERATING CONSIDERATIONS
GRATICULE ................ 4-1
TIME AND VOLTAGE
............ MEASUREMENTS 4-1
............... GROUNDING 4-1
........ SIGNAL CONNECTIONS 4-2
INPUT-COUPLINGCAPACITOR
PRECHARGING
.............. 4-2
......
EXTERNALTRIGGERING 4-2
ADJUSTMENTS
............. INTRODUCTION 5-1
..............
INITIALSETUP 5-1
TRACE ROTATION
............... ADJUSTMENT 5-1
...
ASTIGMATISM ADJUSTMENT 5-2
AUTO DC BALANCE
............... ADJUSTMENT 5-2
PROBE LOW-FREQUENCY
.............
COMPENSATION 5-2
MATCHINGCHPrNNEL2DELAY
.. 5-3
.......... AMPLITUDE CHECK 5-4
..............
TIMINGCHECK 5-4
SECTION 6 BASICAPPLICATIONS
INDEX OF PROCEDURES ....... 6-1
..... VOLTAGE MEASUREMENT 6-1
VOLTAGE RATIO
............ 6-2
ALGEBRAIC ADDITION AND
ELIMINATING COMMON-MODE
SIGNALS
.................. 6-3
TIME INTERVAL
............. 6-4
FREOUENCY
............... 6-4
TlME DIFFERENCE BETWEEN
TWO TIME-RELATED PULSES
... 6-5
TIME RATIO
................ 6-5
PHASE DIFFERENCE BETWEEN
TWOTIME-RELATEDSIGNALS
. . 6-6
SMALL-ANGLEPHASE
DIFFERENCE
............... 6-6
DELAYED-SWEEPOPERATION
... 6-7
SECTION 7 OPTIONS AND ACCESSORIES
............. INTRODUCTION 7-1
................. OPTION 11 7-1
................. OPTION 1R 7-1
POWER CORD OPTIONS
........ 7-1
..... STANDARDACCESSORIES 7-2
OPTIONAL ACCESSORIES
...... 7-2
APPENDIX A POWER-UP TESTS
KERNELTESTS .............. A-I
CONFIDENCETESTS
.......... A-I
CHANGE INFORMATION

2465 Operators
LIST OF ILLUSTRATIONS
Figure Page
...............................................
The 2465 Oscilloscope iv
2-1 Line selector switch. line fuse. and detachablepower cord
........................ 2-2
............................................
3-1 Power and display controls 3-1
..........................
3-2 Vertical controls and CH 1OR
X and CH 2 connectors 3-2
3-3 Channel
3 and Channel 4 controls and connectorsand CALIBRATOR output ..........
3-3
.................................
3-4 Horizontal and delta measurementcontrols 3-4
..........................................
3-5 Trigger controls and indicators 3-7
.......................................
3-6 Rear-panelcontrols and connectors 3-10
.............................................
3-7 Readout display locations 3-11
........................................
4-1 Graticule measurement markings 4-1
.......................................
5- 1 Probe low-frequency compensation 5-3
Table
...............................................
Instantaneousdc levels 6-1
.....................................................
Voltage ratios 6-2
.......................................
Eliminating common-modesignals 6-3
.................................................
Measuringrise times 6-4
..................
Time difference betweentwo time-related pulses (cursormethod) 6-5
.............................................
Time ratios (dutycycles) 6-6
.............................
Phase difference betweentwo time-related signals 6-7
...........................................
Small-angle phase difference 6-7
Time difference betweentwo time-related pulses (delayed-sweepmethod)
............. 6-9
LIST OF TABLES
Page
..............................................
Electrical Characteristics 1-2
Environmental Characteristics
.......................................... 1-9
MechanicalCharacteristics
............................................. 1-10
Voltage. Fuse. and Power-Cord Data
......................................
2-3
Confidence Test Numbers and Descriptions
.................................
A-1

2465 Operators
OPERATORS SAFETY SUMMARY
The general safety information in this part of the summary is for both operating and servicing personnel. Specific warnings
andcautions willbe found throughout themanual wherethey apply and do not appear in thissummary.
Terms 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 inpersonal injury or loss of life.
Terms as Marked on Equipment
CAUTION indicates a personal injury hazard not imme-
diately accessible
as one reads the markings, or a hazard to
property, includingthe equipment itself.
DANGER indicates
a personal injury hazard immediately
accessible
as one reads the marking.
Symbols in This Manual
This symbol indicates where applicable
cautionary or other information
is to be
/;\ found. For maximum input voltage see
Table 1-1.
Symbols as Marked on Equipment
DANGER - High voltage.
@ Protectiveground (earth)terminal.
A ATTENTION - Refer to manual.
Power Source
This product is intended to operate from a power source
that does 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 power cord
is essential for safe
operation.
Grounding the Product
This product is grounded through the groundingconductor
of the power cord. To avoid electrical shock, plug the
power cord into
a properly wired receptable before con-
necting to the product input or output terminals. A
protective ground connection by way of the grounding
conductor inthe power cord
is essential for safe operation.
Danger Arising From Loss of Ground
Upon loss of the protective-groundconnection, all acces-
sible conductive parts (including knobs and controls that
may appear to be insulating)can render an electricshock.
Use the Proper Power Cord
Use only the power cord and connector specified for
your product.
Use only
a power cord that is ingood condition.
For detailed information on power cords and connectors
see Table
2-1.
Use the Proper Fuse
To avoid fire hazard, use only a fuse of the correct type,
voltage rating and current rating as specified in the parts
list for your product.
Do NotOperate in Explosive Atmospheres
To avoid explosion, do not operate this product in an
explosive atmosphere unless
it has been specifically cer-
tified for such operation.
Do Not Remove Covers or Panels
To avoid personal injury, do not remove the product
covers or panels. Do not operate the product without the
covers and panels properly installed.
iii

2465 Operators
The 2465 Oscilloscope.
@

Section 1-2645 Operators
SPECIFICATION
INTRODUCTION
The TEKTRONIX 2465 Oscilloscope is a portable 300-
MHz instrument having a four-channel vertical deflection
system. Channel 1 and Channel 2 provide calibrated
deflectionfactors from 2 mV per division to 5 V per division.
For each of these channels, input impedance is selectable
between two values: either 1 MR in parallel with 15 pF, or
50R internal termination. Input-signal coupling with 1-MR
impedance can be selected as either AC or DC. Channel 3
and Channel 4 have deflection factors of either 0.1 V or
0.5 V per division. Each of these channels has an input
impedance of 1 MR in parallel with 15pF, with DC input-
signalcoupling.Trigger circuitsenable stable triggeringover
the full bandwidthof the vertical system.
The horizontal deflection system provides calibrated
sweepspeeds from 1.5 s per divisionto 500 ps per division.
Drivefor the horizontaldeflection system is obtained from a
choiceof A,
B delayed, A alternatedwith Bdelayed sweeps,
or CH 1 (for the X-Y display mode).
The 2465 incorporates alphanumeric crt readoutsof the
verticaland horizontalscale factors, the trigger levels, time-
difference measurement values, voltage-difference
measurement values, and certain auxiliary information.
The 2465 Oscilloscope is shipped with the following
standard accessories:
Probe packages
Snap-lock accessories pouch
Zip-lock accessories pouch
Operators manual
Power cord(installed)
2-A, 250-V fuse
Clear plastic crt filter
Blue plastic crt filter (installed)
Front-panelcover
Operators pocket referencecard
For part numbers and further information about both
standard and optional accessories, refer to the "Options
and Accessoriesnsection (Section
7) of this manual. Your
Tektronix representative, local Tektronix Field Office, or
Tektronix product catalog can also provide accessories
information.
PERFORMANCE CONDITIONS
The following electrical characteristics (Table 1-1) are
valid for the 2465 when it has been adjusted at an ambient
temperaturebetween
+ 20°C and +30°C, has hadawarm-
up period of at least 20 minutes, and is operating at an
ambient temperature between
- 15 O C and + 55 O C (unless
otherwisenoted).
Items listed in the "Performance Requirements" column
are verifiablequalitativeor quantitativelimitsthat definethe
measurement capabilities of the instrument.
Environmentalcharacteristicsare given in Table 1-2. The
2465 Oscilloscopemeetsthe environmentalrequirementsof
MIL-T-28800Cfor Type
Ill, Class 3, StyleCequipment, with
the humidity and temperature requirements defined in
paragraphs 3.9.2.2, 3.9.2.3, and 3.9.2.4.
Mechanical characteristics of the 2465 are listed in
Table 1-3.
REV AUG 1985

Specification-2465 Operators
Table 1-1
Electrical Characteristics
VERTICAL DEFLECTION SYSTEM-CHANNEL
1 AND CHANNEL 2
Characteristics
DeftectEn Factor
Range
Performance Requirements
2 mVper division to 5 V per division in a 1-2-5sequence of 11steps.
Accuracy
+I 5" c to +35O c
Within _+2% at any VOLTSIDIV setting for a 4- or 5-division signal
centered on the screen.
-15°C to +15"C and +35"C to +55"C Add 1
% to + 1 5 O C-to- + 35 O C specification.
AV Accuracy (usingcursors over entire
graticulearea)
+I 5°C to +35OC
+ (1.25%of reading + 0.03 division + signal aberration).
-1 5"
c to +I 5" c and +35" c to +55" c
Add 1 % of reading to +I 5°~-to-+350~specification.
AV Range
---
+ 8 times the VOLTSIDIV switch setting.
Variable Range Continuously variable between VOLTSIDIV switch settings. Extends
deflection factor of the 5 V per division settingtoat least 12.5 V
per division.
Frequency Response
-1 5'~to +55"~ 2 mV
I DCto 100 MHz I DCto 100 MHz
Six-division reference signal from
a terminated 504 system, with
VAR VOLTSIDIV control in calibrated detent.
VOLTSIDIV
setting
AC Coupled Lower -3 dB Point
1 X Probe
5 mV or greater
5 mV or greater
10
Hz or less.
-3 dB bandwidth
with standard-accessory
probe or internal
50-SZ termination
1OX Probe
-4.7 dB bandwidth
with 50-SZ external
termination on
1-MO input
DCto 300 MHz
DC to 250
MHz
1 Hz or less.
- - --
DC to 300 MHz
DC to 250 MHz
Step Response
Rise Time 1.17 ns or
less for VOLTSIDIV switch settings of 5 mV and up
(calculated).
3.5 ns or less for VOLTSIDIV switch setting of 2 mV (calculated).
.Risetime calculated from: bandwidth x rise time
= 0.35.
Common-modeRejection Ratio (CMRR) At least 20:1 at 50 MHz for common-mode signals of eight divisions
or less, with VAR VOLTSIDIV control adjustedfor best CMRR at 50
kHz at VOLTSIDIV switch settingsfrom 5 mV to 5 V. At least 20:1 at
20 MHz for the 2 mV switch setting.
REV JAN 1984