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TA BLE OF CO N TEN TS

SE CTIO N 1 SPE CI FICATIO N S Page
Introduction 1-1
Electrical Ch aracteristics 1-1
Sweep Rate 1-1
Sweep Accuracy 1-1
Sweep L ength 1-1
Sweep H ol d-Off Time 1-1
External H orizontal Am plifier 1-1
Deflection F actor 1-1
F requency Response 1-2
Trigger Sensitivity 1-2
Internal Trigger J itter 1-2
External Trigger Input 1-2
- Auto Sensitivity 1-2
Environmental Characteristics
Altitud e 1-2
Ph ysical Characteristics
F inish 1-2
Dimensions 1-2
Weight 1-2

SECTIO N 2 OPER ATING I NSTRU CTIO NS
General 2-1
Installation 2-1
F ront Panel Controls 2-1
Test Setu p Chart 2-4
General Operating Information 2-4
Sweep Calibration Check 2-4
Sim plified Op erating Instructions 2-4
N ormal Sweep 2-6
Magnifie d Swee p 2-6
Delaye d Swee p 2-6
Pushbutton Switch Logic 2-6
Triggere d L ight 2-6
Trigger Mode 2-7
Trigger Coup ling 2-8
Trigger Source 2-9
Trigger Slope 2-10
Trigger Level 2-10
H orizontal Sweep Rate 2-10
Sweep M agnifier 2-12
H orizontal Position Control 2-12
Display Mode 2-12
TA BLE O F CO N T EN TS (cont)

SECTION 2 OPER ATI N G I NSTRUCTIONS (cont) Page
A pp lications 2-13
General 2-13
F req uency Com parison 2-13
Time Duration M easurements 2-14
Determining F req uency 2-15
Risetime Measurements 2-15
Delayed Sweep Time Measurements 2-16
Delaye d Swee p M ag n ification 2-17
Disp laying Com p lex Signals U sing Delaye d Swee p 2-18
Pulse J itter Measurements 2-18
- Phase Measurements 2-19

SECTION 3 CI R CU IT D ESCR I PTION
Intro d uction 3-1
B loc k Diagram Descri p tion 3-1
Detaile d Circuit Descri p tion 3-1
Trigger In p ut 3-1
Trigger Am p lifier 3-2
In p ut Stage 3-3
Peak Detector 3-3
Slo pe Comparator 3-4
Out p ut Stage 3-4
Trigger Generator 3-4
Trigger Pulse Generator 3-4
Sweep Gate Stage 3-4
Triggered H ol d-Off Stage 3-5
Bright L ine Auto 3-5
External H orizontal Am p lifier 3-5
Time- Base Generator 3-6
General 3-6
N ormal Trigger Mo d e O peration 3-7
Single Swee p Operation 3-8
Alternate O peration 3-8
Delaye d Swee p Operation 3-9
Horizontal Pream p 3-9
Rea d out B loc k 3-9

SE CTION 4 MAI NTENANC E
P reventive Maintenance 4-1
General 4-1
Cleaning 4-1
Visual Ins p ection 4-1
Transistor Ch ec ks 4-1
Recalibration 4-1
TABLE OF CONTENTS (cont)

SECTION 4 MAINTENANCE (cont) Page
Troubleshooting 4-2
Troubleshooting Aids 4-2
Troubleshooting Equipment 4-3
Troubleshooting Techniques 4-3
Corrective Maintenance 4-5
Obtaining Replacement Parts 4-5
Soldering Techniques 4-6
Component Replacement 4-7
Instrument Repackaging 4-8

SECTION 5 PERFORMANCE CHECK/CALIBRATION
Introduction 5-1
Test Equipment Required 5-1
Short Form Procedure 5-2
Performance Check/Calibration Procedure 5-4
General 5-4
Preliminary Control Settings 5-4
Check/Adjust Steps (refer to Short-Form Procedure
for index to steps) 5-5

SECTION 6 ELECTRICAL PARTS LIST
Abbreviations and Symbols
Parts Ordering Information
Index of Electrical Parts List

SECTION 7 DIAGRAMS AND MECHANICAL PARTS ILLUSTRATIONS
Diagrams
Mechanical Parts Illustrations

SECTION 8 MECHANICAL PARTS LIST
Mechanical Parts List Information
Index of Mechanical Parts Illustrations
Mechanical Parts List
Accessories

CHANGE INFORMATION

Abbreviations and symbols used in this manual are based on or
taken directly from IEEE Standard 260 "Standard Symbols for
Units", MIL STD-12B and other standards of the electronics
industry . Change information, if any, is located at the rear of this
manual .
770

S E CTIO N 1
770 SPE CIFICA
Change info rmation, if any, affecting this section will be found at the rear of the m.

Intro d uction the V O LTS IN connector. The sweep free-runs to p ro-
vide bright b ase line in the absence of ad eq uate triggeri ng
T he 71370 Time Base U nit is designed specifically fo r use signal in - AUTO an d AUTO trigge ring modes .
with Tektronix 7700-se ries oscillosco pes . H owever, it is
compatible with all 7000-series oscillosco pes . The 71370
provi d es cali brated swee ps from 5 seconds/d ivision to 0.02
microsecond /d ivision . The 10 M AG N IF I ER exten d s the T he P erformance Chec k Prcedu re give n in Section 5
cali brated swee p to 2 nanoseconds/division . Swee p rates provi d es convenient method of chec king performance of
may b e varied continuously (u ncali brated) between calibra- this i nstrument . The following electrical characteristics
te d steps. Swee p trigge ring is to 200 mega hertz or ve rtical apply at an am bient temperature of 0