Tabor 8020 User manual

User Manual
8020
20 MHz Programmable
Function Generator
Tabor Electronics Ltd.
9 Hatasia Street, Tel Hanan, Israel 20302
TEL: [phone], FAX: [phone]
[www.taborelec.com]
PUBLICATION DATE: April 15, 2007
REVISION: D
Copyright 2001 by Tabor Electronics. All rights reserved. This book or parts thereof may not be reproduced in
any form without written permission of the publisher.

Warranty
Tabor Electronics’ products are warranted against defects in material and workmanship, when
used under normal operating conditions, for a period of one year after delivery. Tabor
Electronics will repair or replace without charge any product which proves defective during
this period. Repair necessitated by misuse of the product is not covered by this warranty. No
other warranties are expressed or implied, including but not limited to the implied warranties
of merchantability and fitness for a particular purpose. Tabor Electronics is not liable for
consequential damage.
REPAIR AND CALIBRATION
Prior authorization is required from Tabor Electronics before products are returned for service.
All service must be performed by Tabor Electronics’ factory or an authorized service center.
Please contact the factory directly for repair and re-calibration:
Tabor Electronics, Ltd.
9 Hatasia Street
Tel Hanan, Israel 20302
Tel: [phone]
Fax: [phone]

Tabor Electronics Ltd.
REPAIR AND CALIBRATION REQUEST FORM
To allow us to better understand your repair requests, we suggest you use
the following outline when calling and include a copy with your instrument
to be sent to the Tabor Repair Facility.
Model Serial No. Date
Company Name Purchase Order #
Billing Address
City
State/Province Zip/Postal Code Country
Shipping Address
City
State/Province Zip/Postal Code Country
Technical Contact Phone Number ( )
Purchasing Contact Phone Number ( )
1. Describe, in detail, the problem and symptoms you are having. Please include
all set up details, such as input/output levels, frequencies, waveform details, etc.
2. If problem is occurring when unit is in remote, please list the program strings used
and the controller type.
3. Please give any additional information you feel would be beneficial in facilitating
a faster repair time (i.e., modifications, etc.)
4. Is calibration data required? Yes No (please circle one)
Call before shipping Ship instruments to nearest support office
Note: We do not accept Iisted on back.
“collect” shipments.

Safety Precautions
The following safety precautions should be observed before using this product and associated
computer. Although some instruments and accessories would normally be used with non-haz-
ardous voltages, there are situations where hazardous conditions may be present. This product
is intended for use by qualified personnel who recognize shock hazards and are familiar with
the safety precautions required to avoid possible injury. Read the operating information
carefully before using the product. Exercise extreme caution when a shock hazard is present.
Lethal voltage may be present on cables, connector jacks, or test fixtures.
The American National Standard Institute (ANSI) states that a shock hazard exists when
voltage levels greater than 30V RMS, 42.4V peak, or 60 VDC are present. A good safety
practice is to expect that hazardous voltage is present in any unknown circuit before touching
or disconnecting the line cord. Before operating an instrument, make sure the line cord is
connected to a properly grounded power receptacle. Inspect the connecting cables and test
leads for possible wear, cracks, or breaks before each use.
For maximum safety, do not touch the product, test cables, or any other of the instrument parts
while power is applied to the circuit under test. ALWAYS remove power from the entire test
system before connecting cables or jumpers, installing or removing cards from the computer,
or making internal changes, such as changing card address. Do not touch any object that could
provide a current path to the common side of the circuit under test or power line (earth) ground.
Always keep dry hands while handling the instrument. If you are using test fixtures, keep the
lid closed while power is applied to the device under test. Safe operation requires that the
computer lid be closed at all times during operation.
Carefully read the Safety Precautions instructions that are supplied with your computer.
Instruments, cables, leads or cords should not be connected to humans. Before performing any
maintenance, disconnect the line cord and all test cables. Finally, maintenance should be
performed by qualified service personnel only. If you have no past experience in instrument
servicing, we strongly recommend that installation and initial tests on the instrument be done
by your dealer or by the factory itself.

DECLARATION OF CONFORMITY
We: Tabor Electronics Ltd.
9 Hatasia Street, Tel Hanan
ISRAEL 20302
declare, that the 50 MHz Pulse/Function Generators
Model 8020 and Model 8021
meet the intent of Directive 89/336/EEC for Electromagnetic Compatibility and complies with the
requirements of the Low Voltage Directive 73/23/EEC. Compliance was demonstrated to the following
specifications as listed in the official Journal of the European Communities:
Safety:
EN 61010-1
IEC 1010-1 (1990) + Amendment 1 (1992)
EMC:
EN 50081-1 Emissions:
EN 55022 - Radiated, Class B
EN 55022 - Conducted, Class B
EN 50082-1 Immunity:
IEC 801-2 (1991) - Electrostatic Discharge
IEC 801-3 / ENV50140 (1993) - RF Radiated
IEC 801-4 (1991) - Fast Transients
Model 8020 and Model 8021 were tested in typical configuration.

TABLE OF CONTENTS
SECTION 1. GENERAL INFORMATION
1-1 Introduction 1-1
1-2 Description 1-1
1-3 InstrumentandManualIdentification 1-2
1-4 Options 1-2
1-5 Specifications 1-2
1-6 SafetyConsideration 1-2
1-7 AccessoriesSupplied 1-2
SECTION 2. INSTALLATION
2-1 Introduction 2-1
2-2 UnpackingandInitialInspection 2-1
2-3 PerformanceChecks 2-1
2-3 PowerRequirements 2-1
2-5 GroundingRequirements 2-1
2-6 InstallationandMounting 2-2
2-7 BenchOperation 2-2
2-8 RackMounting 2-2
2-9 PortableUse 2-2
2-10 ShortTermStorage 2-2
2-11 LongTermStorageorRepackingforShipment 2-2
2-12 Safety 2-3
SECTION 3. OPERATION
3-1 Introduction 3-1
3-2 FrontPanelFamiliarization 3-1
3-2-1 Controls 3-1
3-2-1-1 Status 3-1
3-2-1-2 Display/Modify 3-1
3-2-1-3 TriggerMode 3-3
3-2-1-4 OperatingMode 3-3
3-2-1-5 Output 3-3
3-2-1-6 Modifier 3-3
3-2-2 Connectors 3-3
3-2-3 DisplayAndIndicators 3-4
Model 8020 Table of Contents
Page-1

3-3 RearPanelFamiliarization 3-4
3-3-1 ConnectorsandSwitches 3-4
3-4 Power-upProcedure 3-4
3-5 SoftwareReset 3-5
3-5-1 ParameterPreset 3-5
3-6 DisplayMessages 3-6
3-7 DetectingProgrammingErrors 3-6
3-7-1 GeneralError 3-6
3-7-2 Pulse/RampSet-upErrors(model8021only) 3-6
3-7-3 OffsetErrors 3-6
3-7-4 IEEE-488Errors 3-7
3-8 Selecting2ndFunctions 3-7
3-9 ModifyingParameters 3-7
3-9-1 Modifier 3-8
3-9-2 Range 3-8
3-9-3 ParameterLimits 3-8
3-10 SelectinganOutputWaveform 3-9
3-11 DisablingTheOutput 3-9
3-12 SelectinganOperatingMode 3-9
3-12-1 FunctionGeneratorMode 3-9
3-12-2 SweepGeneratorMode 3-9
3-12-2-1 SelectingSweepDirection 3-9
3-12-3 VoltageControlledOscillatorMode 3-10
3-12-4 PulseGeneratorMode(model8021only) 3-10
3-12-5 AMMode(model8022only) 3-11
3-13 TriggeringThePulseGenerator 3-11
3-14 UsingFrontPanelSet-ups 3-11
3-14-1 StoreSet-ups 3-11
3-14-2 RecallSet-ups 3-12
3-14-2-1 UsingTheRecallMode 3-12
3-15 UsingTheOffset 3-12
3-16 ChangingTheGPIBAddress 3-12
SECTION 4. IEEE PROGRAMMING
4-1 Introduction 4-1
4-2 BusDescription 4-1
4-3 IEEE-488BusLines 4-2
4-3-1 BusManagmentLines 4-2
4-3-2 HandshakeLines 4-2
4-3-3 DataLines 4-3
4-4 InterfaceFunctionCodes 4-3
4-5 SoftwareConsiderations 4-4
4-6 HardwareConsideration 4-4
Model 8020 Table of Contents
Page-2

4-6-1 TypicalControlledSystems 4-4
4-6-2 Connections 4-5
4-7 ChangingGPIBAddress 4-5
4-8 BusCommands 4-5
4-8-1 UnilineCommands 4-6
4-8-2 UniversalMultilineCommands 4-7
4-8-3 AddressedCommands 4-8
4-8-4 UnaddressCommands 4-9
4-8-5 DeviceDependentCommands 4-9
4-8-6 CommonCommandsandQueries 4-9
4-9 DeviceListingFormats 4-9
4-9-1 FunctionElementSummary 4-10
4-9-2 SeperatorFunctionElementSummary 4-10
4-9-2-1 ProgramMessageUnitSeperator 4-10
4-9-2-2 ProgramDataSeperator 4-10
4-9-2-3 ProgramHeaderSeperator 4-10
4-9-3 ProgramMessageTerminator 4-11
4-9-4 CommandProgramHeader 4-11
4-9-5 QueryProgramHeader 4-11
4-9-6 ProgramData 4-11
4-9-6-1 CharacterProgramData 4-11
4-9-6-2 DecimalNumericProgramData 4-11
4-9-6-3 SuffixProgramData 4-12
4-9-6-4 Non-DecimalProgramData 4-12
4-9-6-5 ArbitraryBlockProgramData 4-12
4-9-6-6 ExpressionProgramData 4-12
4-10 Device-DependentCommandProgramming 4-12
4-10-1 DisplayModify(D) 4-12
4-10-2 OperatingMode(P,V,A,O) 4-16
4-10-3 TriggerMode(G,T) 4-16
4-10-4 OutputMode(C,B) 4-16
4-10-5 Waveform(U) 4-16
4-10-6 ParameterProgramming 4-16
4-10-7 CommonCommands 4-17
4-10-7-1 Set-ups(*SAV,*RCL) 4-18
4-11 DeviceTalkingFormats 4-18
4-11-1 FunctionElementSummary 4-19
4-11-2 SeperatorFunctionElementSummary 4-19
4-11-2-1 ResponseMessageUnitSeperator 4-19
4-11-2-2 ResponseDataSeperator 4-19
4-11-2-3 ResponseHeaderSeperator 4-19
4-11-3 ResponseMessageTerminator 4-19
4-11-4 ResponseHeader 4-20
4-11-5 ResponseData 4-20
Model 8020 Table of Contents
Page-3

4-11-5-1 CharacterResponseData 4-20
4-11-5-2 DecimalNumericResponseData 4-20
4-12 ReadingFromtheModel8020 4-20
4-12-1 InterrogateParameterDataQuery 4-21
4-12-2 CommonQueries 4-21
4-12-3 ResponseHeader(X) 4-21
4-12-4 ResponseMessageTerminator 4-22
4-13 DeviceStatusReporting 4-22
4-14 StatusByteRegister 4-22
4-14-1 ReadingtheStatusByteRegister 4-23
4-14-1-1 ReadingwithaSerialPoll 4-23
4-14-1-2 Readingwiththe*STB? 4-23
4-14-1-3 ClearingtheStatusByteRegister 4-23
4-14-1-4 Service Request Enable Register 4-23
4-14-2 StandardEventStatusRegister(ESR) 4-24
4-14-2-1 Standard Event Status Register (ESE) 4-24
4-14-3 Machine Status Register (STT) 4-26
4-15 Front Panel Error Messages 4-26
4-15-1 ILI (Illegal Instruction) Error 4-26
4-15-2 ILP (Illegal Parameter) Error 4-26
SECTION 5. MAINTENANCE AND PERFORMANCE CHECKS
5-1 Introduction 5-1
5-2 LineVoltageSelection 5-1
5-3 FuseReplacement 5-1
5-4 GPIBInterfaceOptionFieldInstallation(option1) 5-1
5-4-1 Option1InstallationProcedure 5-2
5-5 DisassemblyInstructions 5-2
5-6 SpecialHandlingOfStaticSensitiveDevices 5-3
5-7 Cleaning 5-3
5-8 RepairandReplacement 5-3
5-9 PerformanceChecks 5-3
5-9-1 EnvironmentalConditions 5-3
5-9-2 Warm-upPeriod 5-3
5-9-3 RecommendedTestEquipment 5-3
5-10 PerformanceChecksProcedure 5-4
5-10-1 Frequency-GatedMode 5-4
5-10-2 Frequency-ContinuousMode 5-4
5-10-3 Amplitude 5-5
5-10-4 DCCharacteristics 5-5
5-10-5 SquarewaveCharacteristics 5-5
5-10-6 SineCharacteristics 5-5
Model 8020 Table of Contents
Page-4

5-10-7 SineFlatness 5-6
5-10-8 Trigger,Gate,Manual 5-6
5-10-9 Sweep 5-6
5-10-10 VCOControl 5-7
5-10-11 PulseWidth(model8021) 5-7
5-10-12 AmplitudeModulation(model8022) 5-8
SECTION 6. THEORY OF OPERATION
6-1 Introduction 6-1
6-2 OverallFunctionalDescription 6-1
6-3 AnalogCircuitry 6-1
6-3-1 CurrentGenerator 6-1
6-3-2 VoltagecontrolledOscillator 6-3
6-3-3 SineShaper 6-4
6-3-4 TriggerCircuit 6-4
6-3-5 PulseShaper 6-6
6-3-6 Preamplifier 6-7
6-3-7 Attenuator 6-7
6-3-8 OffsetGenerator 6-7
6-3-9 PowerAmplifier 6-7
6-3-10 PostAmplifierAttenuator 6-7
6-3-11 PowerSupply 6-7
6-4 PulseGeneratorCircuit(model8021) 6-7
6-5 AMCircuit(model8022) 6-9
6-6 DigitalCircuitry 6-9
6-6-1 DisplayandKeyboardInterface 6-9
6-6-2 CounterCircuit 6-10
6-6-3 IEEE-488Interface(Option1) 6-10
SECTION 7. ADJUSTMENTS
7-1 Introduction 7-1
7-2 Adjustments 7-1
7-2-1 EnvironmentalConditions 7-1
7-2-2 Warm-upPeriod 7-1
7-2-3 RecommendedTestEquipment 7-1
7-2-4 AdjustmentProcedures 7-1
7-3 AdjustmentProcedure 7-2
7-3-1 PowerSupplyAdjustment 7-2
7-3-2 DistortionAdjustment 7-2
7-3-3 FrequencyAdjustment 7-2
7-3-4 LowFrequencyAdjustment 7-2
7-3-5 LowFrequencyDistortionAdjustment 7-2
Model 8020 Table of Contents
Page-5

7-3-6 TriggerStartPhaseAdjustment 7-3
7-3-7 AmplitudeAdjustment 7-3
7-3-8 OffsetAdjustment 7-3
7-3-9 SquarewaveResponseAdjustment 7-3
7-3-10 SineFlatnessAdjustment 7-3
7-3-11 TriangleFlatnessAdjustment 7-4
7-3-12 ReferenceOscillatorAdjustment 7-4
7-3-13 PulseWidthAdjustment(model8021only) 7-4
7-3-14 RampAmplitudeAdjustment(model8021only) 7-4
7-3-15 AmplitudeModulationAdjustment 7-4
SECTION 8. PARTS LIST
8-1 General 8-1
8-2 OrderingInformation 8-1
8-3 MaintenanceKit 8-1
8-4 PartsDescription 8-1
SECTION 9. SCHEMATIC DIAGRAMS
LIST OF TABLES
1-1 Model8020Specifications 1-3
3-1 DefaultStateAfterSoftwareReset 3-5
3-2 OffsetAmplitudeProgrammingLimits 3-7
3-3 FrontPanelParameterEntryLimits 3-8
4-1 Model8020InterfaceFunctionCodes 4-4
4-2 IEEEcontactDesignation 4-5
4-3 IEEE-488BusCommandSummary 4-6
4-4 Defaultconditions.(StatusafterSDCorDCL) 4-8
4-5 DeviceDependentCommandSummary 4-10
4-6 SRQMaskCommands 4-13
4-7 SRQMaskLegalCommands 4-13
5-1 Line Fuse Selection 5-1
5-2 Required Test Equipment 5-4
8-1 Model 8020 Parts List - Main Board assembly 8-1
8-2 Model 8020 Parts List - Final Amplifier Board Assembly 8-4
8-3 Model 8020 Parts List - Front Panel Board Assembly 8-7
8-4 Model 8021 Parts List - Pulse Generator Board Assembly 8-7
8-5 Model 8022 Parts List - AM Generator Board Assembly 8-8
Model 8020 Table of Contents
Page-6

LIST OF FIGURES
2-1 Model8020-OutlineDimensions 2-3
3-1 FrontPanelControls,IndicatorsandConnectors 3-2
4-1 IEEEBusConfiguration 4-2
4-2 IEEEHandshakeSequence 4-3
4-3 IEEE-488.2StatusReportingModel 4-25
5-1 GPIBInterfaceOptionInstallation 5-2
6-1 Model8020-SimplifiedBlockDiagram 6-2
6-2 CurrentGeneratorSimplifiedBlockDiagram 6-3
6-3 VCOSimplifiedBlockDiagram 6-4
6-4 Model8020-ClampCircuitSimplifiedDiagram 6-5
6-5 Model8020-ClampCircuitWaveform(TriggeredMode) 6-5
6-6 Model8020-ClampCircuitWaveform(GatedMode) 6-6
6-7 PulseGeneratorFunctionalBlockDiagram 6-8
6-8 AM FunctionalBlockDiagram 6-9
Model 8020 Table of Contents
Page-7

Thispagewasintentionallyleftblank
Model 8020 Table of Contents
Page-8

1-1. INTRODUCTION
This manual provides operation and maintenance infor-
mationfortheModel8020FunctionGenerator.Section1
isageneraldescriptionoftheModel8020.Sections2and
3 contain installation and operation instructions. IEEE
programmingisexplainedinSection4.Maintenanceand
performancechecksareprovidedinsection5.Thetheory
of operation is described in section 6. Section 7 outlines
calibrationandtroubleshootingprocedure.Section8con-
tain tables of replaceable parts and recommended spare
parts. Section 9 contains schematic and component loca-
tiondiagrams.
1-2. DESCRIPTION
Model 8020 is a high performance - digital function gen-
erator.Itprovidesavarietyofsignalwaveforms,foruseas
test stimuli to many different electronic devices. Micro-
processor based, Model 8020 is extremely easy to set up
for manual use as well as simple to program in an IEEE-
488GPIBsystemenvironment.Thegeneratorfeaturesas
standard: lin/log sweep, pulse waveforms and complete
triggeringfacilities-includinginternaltriggergenerator.
Model8020providesawidefrequencycoverageanda
largeamplitude span;ensuring continuingusefulnessfor
a variety of tasks, today as well as in the future, when de-
mandschange.Rapid, repeatabletestingevery timeisas-
sured by thirty non-volatile stored set-ups thus, ensuring
exactduplicationofpreviousset-upsnomatterhowcom-
plex is assured. Its performance, programmability and
economymakeitequallyathomeineverylaboratory.
Outputmay be selected tobe either continuous, gated
or triggered. The function generator features a built-in
triggergeneratorwhichcanreplaceanexternaltriggering
device. Additional convenience is achieved through the
MANUALbuttonpermittingusercontrolovertriggering
sequences.
Alternately, model 8020 may also be used as an inde-
pendentsweepgeneratorwithitsoutputsignalsweptover
an exceptionally wide range of 10 decades. A choice of
eight sweep modes, both linear and logarithmic, covers
most applications which are known today. A MARKER
outputisprovidedtopermitZ-axismodulationofanoscil-
loscopetointensifypartsofthescopetrace.
Outputlevel ranges from 20 mV to30Vp-p into open
circuit or 10 mV to 15 Vp-p into 50 ohms. Maximum DC
offset plus AC signal is variable within a window level
from-15Vto+15Vintoopencircuitorfrom-7.5Vto+7.5
Vinto50ohms.
The function generator employs a built-in counter.
Thiscounterisnotavailabletotheoutsideworldhowever,
it is incorporated in an internal loop which automatically
monitorstheoutputfrequency.Whenadeviationofmore
thanafewtenthofapercentisdetectedbythecounter,the
frequency is automatically corrected by the internal mi-
croprocessor.
Therearetwoothermodelswhichwillbedescribedin
thismanual:
Model 8021 - 20 MHz Pulse/Function Generator.
This instrument is identical in its basic functions to the
Model8020.In addition,this instrumentoffersPulseand
Rampcapabilities.Pulsewidthandrampwidthrangesare
controllablewithinarangeof25.0nSto9.99S.Pulsecom-
plementandinvertedrampfunctionsarealsoavailable.
Model8022-20MHzAMFunctionGenerator.This
model offers an amplitude modulation function in addi-
tion to the 8020 functions. Carrier level is controllable
within the range of 0 to 100 %. Modulating signal is ap-
pliedthrough a front panel BNC connector. The operator
mayselect as acarrier any of thestandard available func-
tions.
SECTION 1
GENERAL INFORMATION
Model 8020 General Information
Page 1-1

NOTE
Thismanualprovidesacompletedescription
of all features of the 8020 series. Therefore,
severalofthefeatureswhich aredescribedin
the following paragraphes may not be in-
stalledinyourinstrument.
1-3. INSTRUMENT & MANUAL IDENTIFICATION
The serial number of the instrument is located on the rear
panel of the instrument. The two most significant digits
identify instrument modifications. If this prefix differs
from that listed on the title page of this manual, there are
differencesbetweenthismanualandyourinstrument.
Technicalcorrectionstothismanual(ifany)arelisted
in the back of this manual on an enclosed MANUAL
CHANGESsheet.
1-4. OPTIONS
Model 8020 offers a GPIB interface bus option; desig-
natedasOPTION1.
Option1isfieldinstallableormaybeorderedwithnew
instruments from the factory. Installation procedures are
given in Section 6 of this manual. There are no software
modifications necessary when installing the option. The
instrument will automatically sense the presence of the
newly installed interface and will then permit operation
throughtheIEEE-488GPIBinterface.
1-5. SPECIFICATIONS
Instrument specifications are listed in Tables 1-1. These
specifications are the performance standards or limits
againstwhichtheinstrumentistested.
NOTE
Allspecificationsinthefollowingtableapply
with output terminated with 50 feedthrough
terminationandwithanamplitudeof15Vp-p.
Warm-upperiodis30minatanambienttem-
peratureof25+/-5degC.
1-6. SAFETY CONSIDERATIONS
Model8020isaSafetyClass1instrumentwithanexposed
metal chassis that is directly connected to earth via the
powersupplycableandhasbeenmanufacturedaccording
tointernationalsafetystandards.Beforetheinstrumentis
switched on, make sure that protective earth terminal is
connectedtoaprotectiveearthviathepowercord.Donot
removeinstrumentcoverswhenoperatingorwhenpower
cordisconnectedtomains.
Anyadjustment,maintenanceandrepairoftheopened
instrument under voltage should be avoided as much as
possible, but when inevitable, should be carried out only
byaskilledpersonwhoisawareofthehazardinvolved.
1-7. ACCESSORIES SUPPLIED
The 8020 is supplied with ac power cord and with an in-
structionmanual.Extramanualisavailableonrequest.
General Information Model 8020
Page 1-2

WAVEFORMS: Sine, Triangle, Square, Positive Pulse, Negative Pulse, TTL Pulse (SYNC out), DC
FREQUENCY CHARACTERISTICS
Range: 2 mHz to 20 MHz
Resolution: 3 1/2 digits (2000 counts max) with exponent
Accuracy:
Continuous: +/-3 % of full scale from 2 mHz to 9.99 Hz; .1 % of full scale from 10 Hz to 20MHz
VCO and Gated: +/-3 % of reading to 2.000 MHz; +/-5 % of reading to 20 MHz
Jitter: <0.1 % 50 pS
WAVEFORM CHARACTERISTICS
Sinewave Total harmonic distortion:
<1 % from 2 mHz to 20.0 Hz
<.5 % from 20 Hz to 100 KHz
<1 % from 100 KHz to 1 MHz
Harmonic signals: >25 db below the carrier level from 1 MHz to 20 MHz
Triangle Linearity: Better than 99% up to 100 KHz (measured between 10% to 90% of amplitude)
Squarewave, Pulse:
Rise/Fall time: <12 nS (10 % to 90 % of amplitude)
Abberation: <5 %
TTL Pulse:
Rise/Fall time: <25 nS
OUTPUT CHARACTERISTICS
Stand-by mode: Output Normal or Disabled, selectable
Impedance: 50 ohms +/-2 %
Output Level: 20.0 mV to 30.0 V p-p into open circuit; 10.0 mV to 15.0 V p-p into 50 ohms
Resolution: 2 1/2 digits (150 counts) with exponent
Accuracy (1 KHz): +/-2 % of reading from 1.0 V to 15.0 V
+/-3 % of reading from .10 V to 1.50 V
+/-4 % of reading from 10 mV to 150 mV
Vernier Control: Continuous throughout the output level
Output Protection: protected against continuous short to case ground.
Flatness (sine): <0.5 db to 1 MHz; <1.5 db to 20 MHz
Offset Resolution: 3 digits with exponent
Offset Range: Offset and amplitude are independently selectable within the following window levels:
Window Amplitude Offset Offset
Level Range Accuracy
+/-7.50 V 1.0E 0 -15.0E 0 0E 0 - 7.00 E 0 1% +/-(1% of Ampl + 40mV)
+/-2.37 V 48E 0 - 150E 0 0E 0 - 2.13 E 0 2% +/-(1% of Ampl + 10mV)
+/-750mV .10E 0 - .47E 0 0E-3 - 700 E-3 2% +/-(1% of Ampl + 4mV)
+/-237mV 10E-3 - 150E-3 0E-3 - 232 E-3 3% +/-(1% of Ampl + 1mV)
Table 1-1. Model 8020 Specifications
Model 8020 General Information
Page 1-3

DC CHARACTERISTICS (models 8020 & 8022)
Range: Variable from -15 V to + 15V into open circuit;
-7.5 V to +7.5 V into 50 ohms
Resolution: 3 digits (750 counts max) with exponent
Accuracy: +/-(1% of reading +20 mV) to 7.50 V;
+/-(2% of reading +2 mV) to 750 mV
TRIGGERING CHARACTERISTICS
Source: Manual front panel push button, external TRIG IN or internal trigger generator
Modes:
Normal: Continuous waveform is generated
External Trigger: Each input cycle generates a single output cycle
Internal Trigger: An internal timer repeatedly generates a single output cycle
Gated: External signal enables generator. First output cycle synchronous with active slope of triggering
signal. Last cycle of output waveform always fully completed
External Rate: To 20 MHz
Ext. Trigger Level: TTL
Int. Trigger Period: Continuously adjustable from 10 S to 1000 S
Slope: Positive going leading edge
LOGARITHMIC SWEEP CHARACTERISTICS
Modes: Auto, Manual, Triggered and Gated sweep. Main frequency, when triggered, repeatedly
changes from frequency set by the frequency start to frequency set by the sweep
stop setting. Frequency will sweep up, down, or up-down depending on the rela-
tionship between the sweep start and sweep stop set-ups and the selected sweep
mode
Width: 10 decades maximum
Rate per Decade: continuously adjustable from 10 mS to 1000 S (nominal) per decade
Steps per decade: Depends on sweep time and range. Automatically adjusted by the instrument to get the
maximum steps per sweep time. Maximum steps are 200; minimum steps are 50
Sweep Output: 2 V/decade for decades; 1 V/decade for 5 decades
Marker Output: 0 V with no marker; drops to approx -5 V when marker frequency is reached. Remains -5 V
from the marker frequency to the end of the sweep
Sweep Stop Resolution: Same as frequency resolution
LINEAR SWEEP CHARACTERISTICS
Modes: Same as in logarithmic sweep
Sweep Width: 3 decades maximum
Sweep Time: continuously adjustable from 10 mS to 1000 S (nominal)
Sweep Out: 0 to 10 V +/-5%
Sweep Steps: Depends on sweep time and range. Automatically adjusted by the instrumentto get the
maximum steps per sweep time. Maximum steps are 1000; minimum steps are 16
Table 1-1. Model 8020 Specifications (continued)
General Information Model 8020
Page 1-4

Marker Output: Same as logarithmic sweep
Sweep Stop Resolution: Same as Frequency resolution
VOLTAGE CONTROLLED OSCILLATOR (VCO) CHARACTERISTICS
Input Impedance: 10 Kohms +/-5 %
Sensitivity: 0 V to -10 V +/-20 % produces frequency change 1/1000 from main frequency when
main frequency is set to 2000 counts
Bandwidth: DC to 70 KHz
FM Sensitivity: 0 V to 100 mV modulates to 1% deviation from center frequency
PULSE / RAMP CHARACTERISTICS - MODEL 8021
Pulse Modes: Symmetrical Pulse, Positive Pulse, Negative Pulse and Complement
Pulse Width Range: 25.0 nS to 9.99 S
Max Duty Cycle: 90 % (limited by 25 nS dead time)
Ramp Modes: Positive Going Ramp, Negative Going Ramp
Ramp Width Range: 5.00 uS to 9.99 S
Max Frequency: 150 KHz
Max Duty Cycle: 90 % (limited by 1 uS dead time)
Resolution: 3 digits with exponent
Accuracy: +/-3 % +/-4 nS 25.0 nS to 99.9 mS; +/-10 % 100 mS to 9.99 S
PWM (pulse width modulation):
Mode: External PWM
Input: Via front panel PWM IN BNC connector
Input Impedance: 10 Kohms +/-5 %
Sensitivity: +/-5 V produces >10 % pulse width change when instrument is set to 100 counts
AM CHARACTERISTICS - MODEL 8022
Mode: External AM
Input: Via front panel AM IN BNC connector
Input Impedance: 10 Kohms +/-5 %
Carrier:
Waveform: All available front panel waveforms
Level Range: Continuously adjustable from 0 % to 100 % (100 % carrier level is proportional to one
half of the programmed amplitude level)
Resolution: 3 digits (100 counts max)
Distortion: <1 % at 70 % modulation (Measured with Fc = 1 MHz and Fm = 1 KHz)
Modulating Signal:
Bandwidth: DC to 500 KHz (DC coupled)
Sensitivity: 0 V to 2.5 Vp-p produces 0 % to 100 % modulations respectively when carrier is set to 100
%; 0 V to 5 Vp-p produces suppressed carrier amplitude modulation (SCAM)
having an output amplitude level of 0 V to 15 Vp-p into 50 ohms respectively
when carrier is set to 0 %
Table 1-1. Model 8020 Specifications (continued)
Model 8020 General Information
Page 1-5

GPIB INTERFACE (IEEE-488-1978) - Option 1
Programmable controls: All front panel controls except POWER switch; Output may be disabled through
a bus command
Subsets: SH1, AH1, T6, TE0, L4, LE0, SR1, RL1, PP2, DC1, DT1, C0
Data Output Format: Fixed output format consisting of 15 or 17 ASCII characters plus terminators
Data Input Format: ASCII characters lower or upper case. ASCII characters smaller than 20 HEX (32) are
ignored except CR (0D HEX)
Service Request: Selectable for illegal commands, illegal parameters and error
String Termination: Selectable CR, LF, EOI or combination of all.
Address Selection: Front panel programming. Address is stored in a non-volatile memory
ENVIRONMENTAL
Operating temperature: 0 deg C to 40 deg C ambient
Specified Accuracy: +25 deg C +/-5 deg C
Storage temperature: -40 deg C to +70 deg C
Humidity range: 80% R.H
GENERAL
Display: 4 digits 7 segment LEDs 14.2mm high with automatic decimal point, exponent and polarity
indicators
Power: 115/230 Vac +/- 10 %, 50 or 60 Hz, 50 VA max
Stored Settings: 30 complete sets of front panel control settings. The previous control settings and GPIB ad-
dress are stored in a non-volatile memory. Storage guaranteed for 24 month
Dimensions: 87 x 210 x 390 mm (H x W x L)
Weight: Approximately 5 Kg
Table 1-1. Model 8020 Specifications (continued)
General Information Model 8020
Page 1-6

2-1. INTRODUCTION
Thissectioncontainsinformationandinstructionsneces-
sary for the installation and shipping of the function gen-
erators - 8020 series. Details are provided for initial in-
spection, power connection, grounding safety require-
ments, installation information, and re-packing instruc-
tionsforstorageorshipment.
2-2. UNPACKING AND INITIAL INSPECTION
Unpacking and handling of the counter requires only the
normalprecautionsandproceduresapplicabletothehan-
dlingofsensitiveelectronicequipment.Thecontentsofall
shippingcontainersshouldbecheckedforincludedacces-
sories and certified against the packing slip to ascertain
thattheshipmentiscomplete.
2-3. PERFORMANCE CHECKS
The instrument was carefully inspected for mechanical
andelectricalperformance beforeshipmentfrom thefac-
tory. It should be free of physical defects and in perfect
electrical order upon receipt. Check the instrument for
damage in transit and perform the electrical procedures
outlined in Section 5. If there is indication of damage or
deficiency,seethewarrantyinthismanualandnotifyyour
local Tabor field engineering representative or the fac-
tory.
CAUTION
It is recommended that the operator be fully
familiar with the specifications and all sec-
tionsofthismanual.Failuretodosomaycom-
promisethewarrantyandtheaccuracywhich
Taborhasengineeredintoyourinstrument.
2-4. POWER REQUIREMENTS
The function generator may be operated from any one of
the following sources: a. 103.5 to 126.5 Volts (115 Volts
nominal)b.207to253Volts(230Voltsnominal).
The instrument operates over the power mains fre-
quencyrange of48 to 63Hz. Always verifythat theoper-
atingpowermainsvoltageisthesameasthatspecifiedon
therearpanelvoltageselectorswitch.
CAUTION
Failureto switch the instrument to match the
operatinglinevoltagewilldamagetheinstru-
mentandmayvoidthewarranty.
The Model 8020 should be operated from a power
sourcewith itsneutral ator nearground (earthpotential).
The instrument is not intended for operation from two
phases of a multiphase ac system or across the legs of a
single-phase, three-wire ac power system. Crest factor
(ratioofpeakvoltagetorms)shouldbetypicallywithinthe
range of 1.3 to 1.6 at 10% of the nominal rms mains volt-
age.
2-5. GROUNDING REQUIREMENTS
To insure the safety of operating personnel, the U.S.
O.S.H.A. (Occupational Safety and Health) requirement
and good engineering practice mandate that the instru-
mentpanelandenclosurebe“earth”grounded. AllTabor
instrumentsareprovidedwithanUnderwritersLaborato-
ries(U.L.andV.D.E)listedthree-conductorpowercable,
which when plugged into an appropriate power recepta-
cle, grounds the instrument. The long offset pin on the
maleendofthepowercablecarriesthegroundwiretothe
longpin ofthe Euroconnector(DIN standard)receptacle
ontherearpaneloftheinstrument.
Topreservethesafetyprotectionfeaturewhenoperat-
ing the instrument from a two-contact outlet, use a three-
prongtotwo-prongadapterandconnectthegreenleadon
theadaptertoan“earth”ground.
SECTION 2
INSTALLATION
Model 8020 Installation
Page 2-1