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Page
S E CTIO N 1 SPECI F ICATIONS
Introduction 1-1
E lectrical Characteristics 1-1
Sweep Rate 1-1
Sweep Accu racy 1-1
Sweep L engt h 1-1
Sweep Hol d-Off Time 1-1
Variable -Time Delay 1-1
Delay Time Accuracy 1-1
Multi p lier Incremental L inearity 1-1
J itter 1-1
Differential Ti me Measurement Accuracy 1-2
Trigger Sensitivity 1-2
Internal Trigger J itter 1-2
External T rigger In p ut 1-2
L evel R ange 1-2
- Auto Sensitivity 1-2
E nviron men tal Characteristics
Altitude 1-2
Physical Characteristics
F inish 1-2
Dime n sions 1-2
Weight 1-2
SECTION 2 OP ERATI NG I NSTR UCTIO NS
General 2-1
Installation 2-1
F ront P anel Controls 2-1
Test Setu p C hart 2-4
General Op erating Infor mation 2-4
Swee p Calibration Chec k 2-4
Si mplified Op erating Instructions 2-6
Normal Swee p 2-6
M agnifie d Swee p 2-6
Delaye d Swee p 2-6
Push button Switch Logic 2-6
Triggered L ight 2-7
Trigger M o d e 2-7
Trigger Cou p ling 2-9
Trigger Source 2-10
Trigger Slo p e 2-10
Trigger Level 2-10
Hori z ontal Swee p Rate 2-12
Swee p Magnifier 2-12
Hori z ontal Position Control 2-13
Page
SECTION 2 OPERATING INSTRUCTIONS (cont)
Applications 2-13
General 2-13
Measurement Techniques 2-13
Time Duration Measurements 2-14
Determining Frequency 2-15
Risetime Measurements 2-15
Delay Sweep Time Measurements 2-16
Delayed Sweep Magnification 2-17
Displaying Complex Signals Using Delayed Sweep 2-18
Pulse Jitter Measurements 2-18
SECTION 3 CIRCUIT' DESCRIPTION
Introduction 3-1
Block Diagram Description 3-1
Detailed Circuit Description 3-1
Trigger Input 3-1
Input Source 3-1
Trigger Amplifier 3-2
General 3-2
External Input Amplifier 3-2
Input Stage 3-2
Peak Detector 3-3
Slope Comparator 3-3
Output Stage 3-4
Trigger Generator 3-4
Trigger Pulse Generator 3-4
Sweep Gate Stage 3-4
Triggered Hold-Off Stage 3-4
Bright Line Auto 3-5
Time-Base Generator 3-5
General 3-5
Normal Trigger Mode Operation 3-5
Single Sweep Operation 3-8
Alternate Operation 3-8
Delayed Sweep Operation 3-8
Delay Pickoff 3-9
Horizontal Preamp 3-9
Readout Block 3-9
SECTION 4 MAINTENANCE
Preventive Maintenance 4-1
General 4-1
Cleaning 4-1
Visual Inspection 4-1
Transistor and Integrated Circuit Checks 4-1
Recalibration 4-1
SECTION 4 MAINTENANCE (cont) Page
Troubleshooting 4-2
Troubleshooting Aids 4-2
Troubleshooting Equipment 4-2
Troubleshooting Techniques 4-2
Corrective Maintenance 4-6
General 4-6
Obtaining Replacement Parts 4-6
Soldering Techniques 4-7
Component Replacement 4-7
Instrument Repackaging 4-10
SECTION 5 PERFORMANCE CHECK/CALIBRATION
Introduction 5-1
Test Equipment Required 5-1
Short-Form Procedure and Index 5-2
Performance Check/Calibration Procedure 5-4
General 5-4
Preliminary Control Settings 5-5
Check/Adjust Steps (refer to Short-Form Procedure 5-6
for index to steps)
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.
F ig . 1-1 . 771 Delaying Time Base .
771
713711
Ch ange information, if any, affecting this section will be foundat the rear of the manual.
Introd uction TIME selector . The sweep free-runs provi d ing bright b ase-
line in the absence of adequ ate triggeri ng signal in -
T he 71371 Time Base U nit is d esigned specifically for use AUTO and AUTO triggering mod es .
with Tektronix 7700-Series Oscillosco pes . H owever, it is
compatible with all 7000-Series Oscilloscopes . The 71371
p rovides cali brated swee ps from 5 seco nds/d ivision to 0.02
microseconds/d ivision (2 nanosecond s/d ivision with 10
M AG NI F I ER ) . Sweep r ates may b e varied continuously The P erformance Chec k proce d u re given in Section 5 of
(uncalibrated) between calibrated steps. Sweep triggeri ng is this man ual p rovid es convenient meth od of chec king per-
to 200 megahert z or ve rtical am p lifier b an d wi dth, whic h- formance of this instrument . Th e followi ng electr ical
ever is less . The d elaying swee p feature of the 71371, in ch aracteristics apply at an ambient temperature of 00C to
delayed sweep operation, gives co ntinuous swee p delay +500C, unless otherwise noted . W armu p time for given
from 0 to 10 times the setting of th e /DIV OR D L Y accuracy is 20 m inutes .
TABLE 1-1
Electrical Characteristics
Exclu d e Following
5 secon d s/d ivision to 0.02 micro- P ortions of
seco n d s/ d ivisio n in 1-2-5 se- En d of Swee p; b eyon d 100 divisions
qu ence . 10 magnifier extends
swee p r ate to 2 n a n osecond s/ 10 d ivisions to 13 divisions. s.
d ivision. Sweep H ol d -Off Ti m e
5 s/d iv to
VA RIA BLE R ange Continuously variable betwee n cali- 5 s/d iv
(uncalib rated) brated swee p rates . Exte n d s uncali-
brated swee p rate to at least 12 .5
2 s/d iv to
seco nd s/d ivision .
0.02 s/d iv
Measured in 7700 series mainframe
Variable Time Delay
+150C to +35