Tektronix Option 10 User manual

TEK
070-6864-02
Product Group 38
OPTIONS
SERVICE
(SERIAL NUMBER B050000 AND ABOVE)
WARNING
The following servicing instructions
arefor usebyqualified personnel
only. To avoid personal injury, donot
perform any servicing other thanthat
contained inOperating Instructions
unlessyou are qualifiedto do so.
Refer to Operators Safety Summary
andService Safety Summary priorto
performing any service.
Please check for CHANGE
INFORMATION at the rear
of this manual.
First Printing MAY 1990
Revised
FEB 1991

Instrument Serial Numbers
Each instrument manufactured byTektronix has a serial number on a panel insert or tag, or
stamped onthe chassis. The first letter inthe serial number designatesthe country of
manufacture.The last five digits of the serial number are assigned sequentially and are unique
to each instrument.Those manufacturedinthe United States have six uniquedigits.The
countryof manufacture is identifiedas follows:
B010000 Tektronix, Inc., Beaverton,Oregon, USA
E200000 Tektronix UnitedKingdom, Ltd., London
J300000 SonyTTektronix,Japan
H700000 Tektronix Holland, NV, Heerenveen,The Netherlands
Instrumentsmanufacturedfor Tektronix by externalvendors outsidethe United States are
assigned a two digit alphacodeto identifythe countryof manufacture (e.g.,
JP for Japan, HK
for Hong Kong, etc.).
Tektronix, Inc., PO. Box 500, Beaverton,OR 97077
Copyright
O Tektronix, Inc., 1990.All rights reserved. Tektronix products are covered by US.
andforeign patents, issuedand pending.The followingare registeredtrademarks:
TEKTRONIX, TEK, TEKPROBE, SCOPEMOBILE and

24X5B12467B Options Service
PREFACE
This manual contains service information about the following options to the TEKTRONIX 24458, 24558, 2465B, and
2467B Oscilloscopes:
Option 10 (GPIB)
Option05 (TV) and Option5H (HDN)
0 Option06 (CTT), Option09 (CTTandWR), Option 1E (CTTwith EFR)
0 Option01 (DMM)
Option10makesitpossibletoremotelycontrolthe instrumentthroughtheGeneral PurposeInterfaceBus;Option05and5H makeit
easiertotriggerandview televisionsignals; Option06 andOption09givethe oscilloscopeincreasedmeasurement,counting, and
triggeringcapabilitythroughthe Counterflimerflrigger andWord Recognizer, Option 1E increasesthe accuracy and resolutionof
Option06andOption09frequency measurementsthroughExternalFrequencyReference;Option01addsafully autorangingdigital
multimeter. Operating informationfor the options iscontainedinthe Operatorsmanualfor the oscilloscope.
A few words aboutthe organizationof this manual shouldbe helpful. Some sections deal with each option individuallyandsome
sectionsapply to allthe options. The listsof replaceableelectricaland mechanical parts include all the options, but are separated
accordingtooscilloscope modelnumbers.
Sections1through4areeachdevotedtooneoftheoptions.They includethesetopics:Specifications,Preparationfor Use,Theoryof
Operation,and Performance Check and CalibrationProcedures.
Section
5 covers Maintenancefor allthe options.
Sections 6through 9 are the four Replaceable ElectricalParts lists,onefor eachseparate instrument.
Section 10containsdiagramsonfoldout pages.Thenthe diagramsfor eachspecificoptionare groupedinorder, with the Detailed
Block Diagram first and the Troubleshooting Procedure last. The lnterconnectionCharts and lnterconnectionDiagramcomplete
Section 10.
Sections 11through 14consist of ReplaceableMechanical Parts listsandexplodeddrawingsfor all the options.
At the backof the manualthere isa placeto insert Change Information.

24X58/2467B Options Service
TABLE OF CONTENTS
Page
LISTOF ILLUSTRATIONS ........ vi
LISTOFTABLES ................ vii
OPERATORSSAFETY SUMMARY . ix
SERVICINGSAFETY SUMMARY ... x
1 GPlB OPTION
SPECIFICATION ................. 1-1
INTRODUCTION
............... 1-1
ACCESSORIESANDSOFTWARE
.. 1-1
STANDARD FUNCTIONS.
FORMATS.AND FEATURES
..... 1-2
PERFORMANCECONDITIONS
... 1-1
GPlB PREPARATION FOR USE
..... 1-5
POWER-UPSEQUENCE
......... 1-5
POWER-DOWNSEQUENCE
...... 1-5
THEORY OF OPERATION
.......... 1-8
INTRODUCTION
................ 1-8
SECTION ORGANIZATION
... 1-8
DIGITAL LOGIC
CONVENTIONS
........... 1-8
GENERALCIRCUITDESCRIPTION 1-8
GPlB BOARD
.................. 1-9
DETAILEDCIRCUIT DESCRIPTLON 1-9
INTRODUCTION
............. 1-9
GPlB CIRCUIT BOARD
.......... 1-9
PERFORMANCE CHECKAND
.....
ADJUSTMENTPROCEDURES 1-17
INTRODUCTION
................ 1-17
LIMITSANDTOLERANCES
...... 1-17
TESTEQUIPMENT
............. 1-17
PERFORMANCECHECK
PROCEDURE
................ 1-19
.................
PREPARATION 1-19
...........
GPlB OPTION CHECKS 1-19
ADJUSTMENT PROCEDURE
..... 1-25
Page
2 TELEVISION OPTION and
HIGH DEFINITION TELEVISION OPTION
SPECIFICATION ................. 2-1
INTRODUCTION
............... 2-1
ACCESSORIES
................ 2-1
PERFORMANCECONDITIONS
... 2-1
PREPARATION FOR USE
.......... 2-5
FILTERIGRATICULE
REPLACEMENT
............... 2-5
POWER-UPSEQUENCE
......... 2-5
POWER-DOWNSEQUENCE
...... 2-5
TV PROTOCOLAND
LINE-NUMBERING FORMAT
SELECTION
.................. 2-5
AUTOMATIC SYNC SELECTION
. . 2-6
..........
THEORY OF OPERATION 2-9
INTRODUCTION
................ 2-9
.....
SECTION ORGANIZATION 2-9
DIGITAL LOGIC CONVENTIONS 2-9
GENERALCIRCUIT DESCRIPTION 2-9
TVBOARD
.................. 2-10
DETAILEDCIRCUITDESCRIPTION 2-10
INTRODUCTION
............. 2-10
TELEVISION OPTION CIRCUIT
BOARD
.................... 2-10
PERFORMANCE CHECK AND
.......
ADJUSTMENTPROCEDURE 2-17
INTRODUCTION
................ 2-17
LIMITSAND TOLERANCES
..... 2-17
TEST EQUIPMENT
............ 2-17
PERFORMANCE CHECK
PROCEDURE
............... 2-19
PREPARATION
............. 2-19
........ TV OPTION CHECKS 2-19
ADJUSTMENT PROCEDURE
.... 2-25
iii

24X5Bf2467BOptionsService
TABLE OF CONTENTS (cont)
Page
2A TELEVISION OPTION and
HlGH DEFINITION TELEVISION OPTION
SPECIFICATION ................. 2A-1
INTRODUCTION
............... 2A-1
ACCESSORIES
................ 2A-1
PERFORMANCECONDITIONS
... 2A-1
PREPARATION FOR USE
.......... 2A-5
FILTERIGRATICULE
............... REPLACEMENT 2A-5
POWER-UPSEQUENCE
......... 2A-5
...... POWER-DOWNSEQUENCE 2A-5
N PROTOCOLAND
.............
LINE-NUMBERING 2A-5
AUTOMATIC SYNCSELECTION .
. 2A-6
THEORY OF OPERATION
.......... 2A-9
INTRODUCTION
................ 2A-9
SECTIONALORGANIZATION ... 2A-9
DIGITALLOGIC CONVENTIONS 2A-9
GENERALCIRCUIT
DESCRIPTION
................... 2A-9
HDNBOARD
................. 2A-10
DETAILEDCIRCUIT
DESCRIPTION
................... 2A-10
INTRODUCTION
............... 2A-10
HlGHDEFINITIONTELEVISION
.......
OPTION CIRCUIT BOARD 2A-10
PERFORMANCECHECK AND
ADJUSTMENTPROCEDURES ...... 2A-17
INTRODUCTION................2A-17
LIMITSAND TOLERANCES ....... 2A-17
..............
TEST EQUIPMENT 2A-17
PERFORMANCECHECK
....................
PROCEDURE 2A-19
PREPARATION
................. 2A-19
.........
HDTVOPTION CHECKS 2A-19
ADJUSTMENT PROCEDURE
....... 2A-25
Page
3 COUNTERJTIMERJTRIGGER.
WORD RECOGNIZERAND
EXTERNAL FREQUENCY REFERENCE
OPTIONS
.................
SPECIFICATION 3-1
...............
INTRODUCTION 3-1
ACCESSORIES ................ 3-1
.....
DESCRIPTIONOF FUNCTIONS 3-2
..... PERFORMANCECONDITIONS 3-3
..........
PREPARATIONFOR USE 3-13
OPERATINGCONSIDERATIONS .. 3-13
POWER-UP TESTS
............. 3-13
THEORY OFOPERATION
.......... 3-15
INTRODUCTION
............... 3-15
SECTION ORGANIZATION
..... 3-15
DIGITALLOGICCONVENTIONS 3-15
GENERAL CIRCUIT DESCRIPTION 3-15
INTRODUCTION
............. 3-15
.................
CTT BOARD 3-16
.........WORD RECOGNIZER 3-16
EXTERNALFREQUENCY
REFERENCE ............... 3-17
DETAILEDCIRCUIT DESCRIPTION .. 3-17
........................
INTRO 3-17
.................
CTTCIRCUITRY 3-17
WORD RECOGNIZER CIRCUITRY
... 3-25
EXTERNALFREQUENCY .........REFERENCECIRCUITRY 3-28
PERFORMANCECHECKAND
......
ADJUSTMENT PROCEDURE 3-29
...............
INTRODUCTION 3-29
.....
LIMITSAND TOLERANCES 3-29
............
TEST EQUIPMENT 3-29
PERFORMANCECHECK
.................
PROCEDURE 3-30
PREPARATION
............... 3-30
COUNTERfrlMER/TRlGGER
...................
CHECKS 3-31
WORD RECOGNIZER CHECKS
. 3-36
EXTERNALFREQUENCY
...............
REFERENCE 3-41
ADJUSTMENT PROCEDURE
..... 3-42
............... PREPARATION 3-42
COUNTER/TlMER/TRlGGER
ADJUSTMENT PROCEDURE
.... 3-42

24X5BJ2467BOptions Service
TABLE OF CONTENTS (cont)
Page
4 DIGITAL MULTIMETER OPTION
SPECIFICATION ................. 4-1
INTRODUCTION
............... 4-1
ACCESSORIES
................ 4-1
...
PERFORMANCECONDITIONS 4-1
.......... PREPARATION FOR USE 4-9
........ POWER-UP SEQUENCE 4-9
.....
POWER-DOWN SEQUENCE 4-9
...
DMMPARAMETERSELECTION 4-10
DMM FUSES
.................. 4-10
THEORY OFOPERATION
.......... 4-11
INTRODUCTION
............... 4-11
.....
SECTION ORGANIZATION 4-11
DIGITAL LOGICCONVENTIONS 4-11
GENERALCIRCUIT DESCRIPTION 4-11
DMM BOARD
................ 4-12
DETAILEDCIRCUIT DESCRIPTION 4-12
.............
INTRODUCTION 4-12
DIGITALMULTIMETER OPTION
. 4-12
PERFORMANCECHECK AND
ADJUSTMENT PROCEDURE
.... 4-23
INTRODUCTION
............ 4-23
LIMITSAND TOLERANCES
... 4-23
TEST EQUIPMENT
.......... 4-23
PERFORMANCECHECK
PROCEDURE
............... 4-24
PREPARATION
............... 4-24
DMM OPTION CHECKS
....... 4-24
.....
ADJUSTMENT PROCEDURE 4-28
INTRODUCTION
............. 4-28
PREPARATION
............... 4-28
DMMADJUSTMENT
.......... 4-28
Page
5 OPTIONS MAINTENANCE
TROUBLESHOOTING ........... 5-1
GENERALTROUBLESHOOTING
...............
PROCEDURE 5-1
......
DIAGNOSTIC ROUTINES 5-1
CORRECTIVE MAINTENANCE
.... 5-16
REMOVALAND REPLACEMENT
INSTRUCTIONS
............. 5-16
6 REPLACEABLE ELEC PARTS-2445B
7 REPLACEABLE ELEC PARTS-2455B
8 REPLACEABLE ELEC PARTS-2465B
9 REPLACEABLE ELEC PARTS-2467B
10 DIAGRAMS
d1 REPLACEABLE MECH PARTS-2445B
12 REPLACEABLE MECH PARTS-2455B
13 REPLACEABLEMECH PARTS-2465B
14 REPLACEABLE MECH PARTS-2467B
CHANGE INFORMATION

24X5B12467B Options Service
Figure
2-1
2-2
2A-I
2A-2
2A-3
2A-4
3-1
4- 1
4-2
4-3
4-4
4-5
5-1
5-2
5-3
10-1
10-2
10-3
10-4
10-5
10-6
10-8
10-9
10-10
10-11
10-12
10-13
10-14
10-15
LIST OF ILLUSTRATIONS
Page
.......................................................
LoopGain Adjustment. 2-28
..................................................
LoopGainOver-Adjustment. 2-28
.................................................
HDTV Loop GainAdjustment. 2A-28
.............................................
HDTV LoopGain Over-Adjustment. 2A-28
..........................................
Back PorchClamptiming adjustment. 2A-30
Correct Back Porch Clamptiming adjustment.
.................................... 2A-30
The Word Recognizer Probe
.................................................. 3-3
DimensionalDrawingof the24X5B Option01 Oscilloscope
......................... 4-8
................................................
CurrentSourcetiming diagram 4-16
DigitalControltiming diagram
................................................. 4-17
................................................
DigitalCountertiming diagram 4-21
Test setupfor DMM commonmodecheck
....................................... 4-30
.........................................................
DCVolts test setup. 5-12
AMPSIOHMStest setups.
.................................................... 5-13
AC Volts test setup.
.......................................................... 5-14
Color codefor resistorsandcapacitors.
Semiconductorleadconfigurations.
Locatingcomponentsonschematicdiagramsand circuit board illustrations.
GPlB (Option10) simplifiedblockdiagram.
N (Option05) simplifiedblock diagram.
CTTandWR (Option06/09) simplifiedblockdiagram.
GPlB (Option10)detailedblock diagram.
A23
- GPIBboard.
A22
- LED board.
TV (Option05) detailedblock diagram.
CTTandWR (Option06/09) detailed blockdiagram.
A26
- TVICTT board.
N Optiontiming board.
A31-Word Recognizer board1 (top),and
A33
- Word Recognizer board2 (bottom).
DMM (Option01) detailedblockdiagram.
A29- DMM board.
A30
- Extendedfront panel board.
HDTV (Option5H) simplifiedblockdiagram.
A26
- HDTVICTTboard.
HDNOptiontiming diagram.
HDTV Optiontiming diagram (cont).

24X5B12467B Options Service
LIST OF TABLES
Page
ANSI/IEEE Std 488-1978 (GPIB) Functions ....................................... 1-2
Specific Features Implemented
................................................ 1-2
Specific Format Choices
..................................................... 1-2
Option 10 ElectricalCharacteristics
............................................ 1-3
........................................... Option 10 MechanicalCharacteristics 1-4
GPlB OptionMemory Map
................................................... 1-8
Test EquipmentRequired
.................................................... 1-10
............................................. Status Eventand Error Categories 1-19
GPlBStatus Codes
......................................................... 1-20
Option05 ElectricalCharacteristics
............................................ 2-2
Option05 MechanicalCharacteristics
........................................... 2-3
TV OptionMemory Map
...................................................... 2-14
Test EquipmentRequired
..................................................... 2-18
Option5H ElectricalCharacteristics
............................................ 2A-2
Option5H MechanicalCharacteristics .......................................... 2A-3
HDTV OptionMemory Map
................................................... 2A-14
Test EquipmentRequired
..................................................... 2A-18
Counter/TimerrTriggerElectricalCharacteristics
.................................. 3-4
Word Recognizer ElectricalCharacteristics
...................................... 3-10
................................................... MechanicalCharacteristics 3-11
ResolutionSelections
........................................................ 3-12
Auto Resolution
............................................................ 3-12
...................................................
CTTandWRmemoryMap 3-18
Counteruse
............................................................... 3-20
Control RegisterSetup
....................................................... 3-21
GateArraylnputs
........................................................... 3-22
SignalsTo/From CTTfor CTT Modes
........................................... 3-23
Control RegisterSetup
....................................................... 3-26
Test EquipmentRequired
..................................................... 3-30
DataSetupTime Checks
..................................................... 3-37
DataholdTimechecks
....................................................... 3-38
MinimumClock PulseWidthChecks
........................................... 3-38
Delay FromSelected EdgetoWORD RECOG OUT Checks
......................... 3-39
Word RecognitionDelay
..................................................... 3-39
Option01 ElectricalCharacteristics
............................................ 4-2
........................................... Option01 MechanicalCharacteristics 4-7
DCVolts Selections
......................................................... 4-13
...........................................................
OhmsSelections 4-15
Continuity
................................................................. 4-18
LORControlSignals
........................................................ 4-18
Hi
fl ControlSignals ........................................................ 4-18
DCVolts Control Signals
..................................................... 4-18
AC Volts ControlSignals
..................................................... 4-18
DCAmps ControlSignals
.................................................... 4-18
AC Amps ControlSignals
.................................................... 4-18
ControlSignalsto Measure
................................................... 4-19
................................................... ControlSignalsto Measure 4-19
DMM OptionMemory Map
.................................................... 4-19
Test EquipmentRequired
..................................................... 4-24
..................................................
DcVoltageReadoutChecks 4-25
..................................................
AcVoltageReadoutChecks 4-25
vii

24X5B/2467B Options Service
LIST OF TABLES (cont)
Table
Page
AcVoltageReadoutChecks .................................................. 4-25
.......................................................
LO ReadoutChecks 4-26
HIa Readoutchecks ....................................................... 4-26
..................................................
DcCurrent Readout Checks 4-26
..................................................
Ac Current ReadoutChecks 4-26
.........................................................
CalibrationRoutines 4-28
....................................................
KernelTest FailureCodes 5-1
................................................
Front-Panel LEDOption Codes 5-2
................................................
Front-PanelLED DeviceCodes 5-2
.............................................
Diagnosticand Exerciser Routines 5-3
..........................................................
OptionDesignators 5-14
viii

24X5B12467B Options Service
OPERATORS SAFETY SUMMARY
The general safety information in this part of the summary is for both operating and servicing personnel. Specific warnings and
cautionswillbe found throughout the manual where they apply and do not appear in thissummary
Terms InThis Manual Grounding the Product
CAUTION statementsidentifyconditionsor practicesthatcould This product is grounded through the grounding conductorof
result indamageto the equipment or other property. the power cord. To avoid electrical shock, plugthe powercord
intoaproperlywiredreceptaclebeforemakinganyconnections
to the product input or output terminals.
A protective ground
WARNING statementsidentifyconditionsOr practicesthatcould connectionbywayofthegroundingconductorinthe powercord
result inpersonal injury or lossof life. isessentialfor safe operation.
Terms As MarkedOn Equipment Danger Arising from Loss of Ground
DANGER indicates a personal injury hazard immediately
accessibleas one readsthe marking.
Symbols InThis Manual
This symbol indicates where applicable cautionary
or other information
is to be found. For maximum
inputvoltage see Table
1-1.
Symbols As MarkedOn Equipment
7 DANGER- Highvoltage.
@ Protectiveground (earth)terminal.
A
ATTENTION - Refer to manual.
Power Source
Use the Proper Power Cord
Use only the power cord and connector specified for
your product.
Useonly a power cordthat is ingood condition.
For detailed informationon power cords and connectors, see
Table
2-1.
Use the Proper Fuse
To avoidfire hazard, useonly afuseof thecorrect type, voltage
rating and current rating as specified in the parts list for
your product.
Do Not Operatein ExplosiveAtmospheres
To avoidexplosion,donotoperatethisinstrumentinanexplosive
atmosphere unless it has been specifically certified for
such operation.
Thisproductisintendedtooperatefromapowersourcethatwill
DONot Remove Covers or Panels
not apply more than 250 volts rms between the supply
conductorsor between eithersupply conductor and ground.
A
To avoid personal injury, do not remove the product covers or
protectivegroundconnectionbyway of thegroundingconduc- panels. Do not operate the instrument without the covers and
tor inthe powercord is essentialfor safe operation. panelsproperly installed.

24X5B/2467B Options Service
SERVICING SAFETY SUMMARY
FOR QUALIFIED SERVICE PERSONNEL ONLY
Refer also to thepreceding OperatorsSafety Summary.
Do Not Service Alone
Do not perform internal service or adjustment of this product
unless another person capable of rendering first aid and
resuscitationispresent.
Use Care When ServicingWith Power On
Dangerous voltages exist at several points inthis product.To
avoid personal injury, do not touch exposed connections or
componentswhile power is on.
Disconnectpowerbeforeremovingprotectivepanels,soldering,
or replacingcomponents.
Power Source
This product is intendedto operate from a power source that
does not apply more than
250 volts rms between the supply
conductorsor betweeneithersupply conductorandground.
A
protectivegroundconnectionbyway ofthe groundingconduc-
tor inthe power cord isessentialfor safe operation.

Section I
GPlB

Section 1-GPIB Option
24X5B12467B Options Service
SPECIFICATION
INTRODUCTION
Option 10 to the 24X5B and 2467B Oscilloscopes adds
the hardware and software that allows these instruments
to be remotely controlled and queried using a standard
interface system. The interface implemented conforms to
the specifications contained in
IEEE Standard Digital lnter-
face for Programmable Instrumentation (ANSUEEE Std
488-1978), commonly referred to as the General Purpose
Interface Bus (GPIB). It also complies with a Tektronix
Standard relating to GPlB Codes, Formats, Conventions
and Features.
This manual describes GPIB operational elements only
in relation to communication between the oscilloscope and
the remote controller by way of the bus. For complete
information regarding GPlB electrical, mechanical, and
functional aspects, refer to ANSIIIEEE Std 488-1978,
which is published by:
The Institute of Electrical and Electronics Engineers, Inc.
345 East 47th Street
New York, New York 10017
Messages originating from a remote controlling device
and transmitted over the GPlB perform one of three
functions:
Oscilloscope and Controller," of the 24X5BI2467B
Option 10 lnstrument lnterfacing Guide (IIG). A listing of
command headers and arguments, along with concise
descriptions, is provided in Section 6 of the IIG.
The alphanumeric CRT readout is used to display mea-
surement results, diagnostic test messages, exercise
messages, and calibration messages. Any measurement
result that is displayed on the CRT readout can also be
transmitted over the GPIB.
ACCESSORIES AND SOFTWARE
Standard Accessory
In addition to the standard accessories listed in the
oscilloscope manuals, one copy of the following Option 10
accessory is provided:
24X5B12467BOption 10 lnstrument lnterfacingGuide
Optional Accessories
The optional accessories for Option 10 are:
24X5B12467BOptions Service Manual
GPlB Cables-1 m,
2 m and 4 m double shield, low
EMC
1. Set the oscilloscope operatingmode. ProtectiveWaterproof Vinyl Cover
2. Query the state of the oscilloscope.
Software
3. Query the results of measurements made.
All oscilloscope front-panel functions are controllable
through the GPlB interface, with these exceptions: BEAM
FIND, FOCUS, TRACE ROTATION, ASTIG, SCALE
ILLUM, and POWER. Structure and format of the com-
mands and queries executable by the GPlB Option are
explained in Section 5, "Communication Between
The following software is available for instruments with
GPIB:
EZ-TEK 2400 Test Program Generator
EZ-TEK 2400 PC Test Program Generator (requires
GURU hardware)
GPlB User's Resource Utility (GURU)

GP~B option-Specification
24~5~/2467~ Options Service
The service manual and all other optional acces-
sories and software can be ordered from
Tektronix, Inc. A local Tektronix Field Office, represen-
tative, or the Tektronix Product catalog can provide
ordering and product information.
Table 1-2
Specific Features Implemented
STANDARD FUNCTIONS, FORMATS,
AND FEATURES
Feature
Indicators
Parameter
Selection
Secondary
Addressing
The total interface-function repertoire of an instrument
on the GPIB, in terms of interface-function subsets, is
identified in
ANSI/IEEE Std 488-1978. The status of sub-
sets applicable to 24X5B and 24678 Oscilloscopes with
Option 1
0 are listed in Table 1-1.
Description
REM (remote), SRQ (service request), and
LOCK (front-panellockout) indicators are
included.
Selection is via diagnostic menu and CRT
readout. Nonvolatile storage is in the base
instrument's RAM. No hard-wired
switches are providedfor this feature.
Not implemented.
Format
Parameter
Format Characters
Table 1-3
Specific Format Choices
Description
Not transmitted; ignored on
reception.
A Tektronix standard identifies the format and features
of messages sent over the bus to communicate with other
instruments equipped with a GPIB interface. Specific
features implemented in the 24x58 and 2467B Oscillo-
scopes are listed in Table 1-2, and specific formats are
shown in Table 1-3.
MessageTerminato Either the End-or-Identify (EOI) or
the Line-Feed (LF) mode can be
selected.
Measurement
Terminator Followsprogram message-unit
syntax, which allows numeric
characters in headers and
alphabetic data arguments for
reporting.
Used in Listen and Talk modes.
Table 1-1
ANSIIIEEE Std 488-1978 (GPIB) Functions
Link Data
(Arguments)
Instrument
IdentificationQuery
SETtings Query
Descriptorsare added for other
installedo~tions.
Function
SH1
AH 1 1 Acceptor Handshake. Complete capability.
Description
Source Handshake. Complete capability.
Extended, using LLSet commands,
to allow block binary response.
Basic Talker. Responds to Serial Poll.
Unaddress if My Listen Address (MLA) is
received. lNlt Command Causes the oscilloscope to return to
a power-on condition. All operating
modes then agree with actual front-
panel settings.
Asserted when any front-panel
control attempts to change a GPIB-
controllablefunction.
Returnto Local (rtl)
Message
L3
SR1
RL1
DC1
PPO
TimeIDate
Commands
Basic Listener. Listen Only. Unaddress if
My Talk Address (MTA) is received.
-
Service Request. Complete capability.
Remote-Local. Complete capability.
Device Clear. Complete capability.
Parallel Poll. Does not respondto Parallel
Poll.
Not implemented.
Stored Setting
Commands Not implemented.
Device Trigger. Does not have Device
Trigger capability.
Controller. Does not have Controller
capabilities.
Waveform
Transmission Not implemented.
Device Trigger (DT)
Multiple Event
Reporting
IEEE728
Not im~lemented.
NOTE
Not implemented.
Open collector bus drivers (El) are used by this
instrument.
- - -
Compliance not intended.

GPlB Option-Specification
24x58124678 Options Service
PERFORMANCE CONDITIONS tics of Option 10 instruments (including the performance
Except as noted in Tables 1-4 and 1-5 of this manual, conditions) are identical to those specified in the respective
the electrical, environmental, and mechanical characteris- 24x58 and 2467B Oscilloscope Operators manual.
Table 1-4
Option 10 ElectricalCharacteristics
Characteristics
Vertical PositionAccuracy
CH 1, CH 2 (noninverted)
+15"C to +35"C
CH 2 Inverted
-15°C to +15"C and +35"C to +55"C
CH
3 and CH 4
IEEE 488 Outputs
Volts Out for True (lo,
= 48 mA)
Volts Out for False (lo,
= -5.2 mA)
Volts Out with Output Disabled
Output Leakage Current with Power OFF
(0 V < VIN < 2.5 V)
IEEE488 Inputs
Volts In for True
Volts In for False
Current In for True
(V,,
= 0.5 V)
Current Infor False
(V,,
= 2.7 V)
aPerformanceRequirementnot checked in manual.
- --
Performance Requirements
Positionaccuracy is only valid when:
1. Positioning occurs after a BALance command is
invoked at the ambient temperature in which the
instrumentis operating.
2. The VOLTSIDIV VAR control is in the calibrated
detent.
k(0.3 division
+ 3%of distance from center screen in div
+ 0.5 mV/V/DIV setting).
Add 0.2 div.
Add 1.5 mV/V/DIV setting.
k(0.7 division
+ 3% of distance from center screen in
divs.)
Max 0.5 V.a
Min 2.5 V.a
Max 3.7 V, Min 2.5 V.a
Max 40
Max 0.8 V, Min 0 V.a
Max 5.5 V, Min 2.0 V.a
Max -0.1 mA.a
Max 20
PA.^

GPlB Option-Specification
24x58124678 Options Service Table
1-5
Option 10 MechanicalCharacteristics
Characteristics
Weight
Domestic Shipping Weight
I ,c 17.6 kg (38.8 lb).
Performance Requirements
With Power Cord, Cover, Pouch, Probes,
Operators Manual, and Options
6 12.0 kg (26.4 Ib).

GPlB Option-Preparation for Use
24X5B12467B Options Service
GPlB PREPARATION FOR USE
Before initially turning on power to the instrument, read Section 2 in the standard oscilloscope Service manual and follow
the safety and precautionary informationdescribed there.
POWER-UP SEQUENCE
A Confidence test failure may not render the GPlB
interface inoperable. Pressing in the A/B TRlG button may
still place the instrument into the normal operating mode;
The power-up tests, automatically performed each time however, it may not meet all GPlB specifications-
the oscilloscope is turned on, examine both the oscillo-
scope circuitry and the Option 10 GPlB circuitry. Tests
that apply to the GPlB Option are integrated into the
SUCC~SS~U~Power-Up Sequencing
power-up tests for the host oscilloscope; they include the
GPlB Kerneltests and a Confidencetest. When the power-up routine is successfully completed
without a failure indication, five instrumentevents occur:
Kernel Tests
Operation of the Option 10 memory (ROM) is checked
by Kernel tests. Failure of any GPlB Kernel test is also
signaled by a flashing A SWP TRIG'D indicator on the
instrumentfront panel.
Even with a Kernel failure, pressing the A/B TRlG
button may still place the instrument in an operating mode.
However, if the operating mode is successfully entered,
instrumentoperation may be unpredictable.
Confidence Test 5.
Failure of the GPlB Confidence test during power-up is
indicated in the bottom line of the CRT readout. The failure
display has the followingformat:
GP TEST 11 FAIL YY
The oscilloscope enters the normal operating
mode.
The GPlB interface enters the Local State
(LOCS).
The GPlB interface asserts Service Request
(SRQ) provided the Request Service (RQS)
status is ON. (See the RQS System Command
description in Table 6-5 of the 24X5BI2467B
Option 10 lnstrument lnterfacingGuide.)
The oscilloscope functions are set to the values
which were established before the instrument
was last turned off, with front-panel settings tak-
ing precedence.
The GPlB interface responds to a controller's
serial poll with a status byte of 65 (decimal),
meaning that all tests were successful and
power is on, provided the Request Service
(RQS) stored status is ON. (See the RQS Sys-
tem Command description in Table 6-5 of the
24X5BI2467B Option 10 lnstrument lnterfacing
Guide.)
where
YY represents the code for the failed test The instrument is now ready to make measurements as
segment. required.

GPlB Option- Preparationfor Use
24x58124678 Options Service
Unsuccessful Power-Up Sequencing
If power-uptests fail, four instrumentevents occur:
RQS System Command description in
Table 6-5
of the 24x58124678 Option 10 lnstrument lnter-
facing Guide.)
1. The oscilloscope does not enter the normal As explained in preceding paragraphs, it may be possi-
operating mode. ble, after a power-up test failure, to place the instrument
into a normal operating mode by pressing the AIB TRIG
button. If it then functions adequately for your particular
2. The GPlB interface enters the Local State measurement requirement, the instrument can be used,
(LOCS). but refer it to a qualifiedservice technician for repair of the
problem as soon as possible.
3. The GPlB interface asserts Service Request
(SRQ) provided the Request Service (RQS)
stored status is ON. (Seethe RQS System Com-
mand description in Table 6-5 of the
POWER-DOWN SEQUENCE
24X5Bl2467B lnstrument InterfacingGuide.) There are no special sequences associated with power-
ing down the instrument. When the POWER switch is set
4. The GPlB interface responds to a controller's to OFF, the instrument powers down and the most recent
serial poll with a status byte of 65 (decimal), RQS ON or RQS OFF command determines whether the
meaning that power is on, providedthe Request GPlB interfacewill assert the Service Request (SRQ) mes-
Service (RQS) stored status is ON. (See the sage at the next power-on.