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TEKTRONIX
7D15
UNIVERSAL
COUNTER/TIMER
INSTRUCTION MANUAL
Tektronix, Inc .
P .O . Box 500
Beaverton, Oregon 97077 Serial Number
070-1433-00 First Printing SEP 1974
WARRANTY
All TEKTRONIX instruments are warranted against
defective materials and workmanship for one year .
Any questions with respect to the warranty should
betaken up with yourTEKTRONIX Field Engineeror
representative .
All requests for repairs and- replacement parts
should be directed to the TEKTRONIX Field Office
or representative in your area . This will assure you
the fastest possible service. Please me ede the
instrument Type Number or Part Number and Seriai
Number with all requests for parts or service .
Specifications and price change priviiege~:, reserved .
Copyright 1974 by Tektronix, Inc ., Beaverton-,
Oregon . Printed in the United States of America. All
rights reserved . Contents of this publication may not
be reproduced in any form without permission of
Tektronix, Inc.
U .S .A . and foreign TEKTRONIX products covered
by U .S . and foreign patents and/or patents pending.
TEKTRONIX is a registered trademark of Tektronix,
Inc .
TABLE OF CONTENTS
SECTION 1 SPECIFICATION Page
Introduction 1-1
Electrical Characteristics 1-1
Environmental Characteristics 1-7
Physical Characteristics 1-7
SECTION 2 OPERATING INSTRUCTIONS
Installation 2-1
Front Panel Controls and Connectors 2-2
Modes of Operation 2-7
Operation and Checkout 2-10
SECTION 3 CIRCUIT DESCRIPTION
Introduction 3-1
Block Diagram Description 3-1
General 3-1
Input 3-1
Clock 3-1
Gate 3-2
Counters and Readout 3-7
Reset 3-7
Trigger Input Amplifiers 3-8
Time Base 3-8
Arm Inputs 3-9
Reset Circuitry 3-9
Readout Theory 3-10
General 3-10
CH 1 Column and Row Data 3-10
CH 2 Column and Row Data 3-12
Overflow 3-13
-5 V Supply 3-14
SECTION 4 MAINTENANCE
Introduction 4-1
Preventive Maintenance 4-1
Troubleshooting 4-1
Corrective Maintenance 4-3
Component Replacement 4-4
Recalibration After Repair 4-4
SECTION 5 CALIBRATION
Introduction 5-1
Test Equipment Required 5-1
Calibration Procedure 5-4
Index to Calibration Procedure 5-5
SECTION 6 ELECTRICAL PARTS LIST
Abbreviations and Symbols
SECTION 7 DIAGRAMS AND CIRCUIT BOARD ILLUSTRATIONS
Symbols and Reference Designators
SECTION 8 MECHANICAL PARTS LIST
CHANGE INFORMATION
Fig. 1-1 . 71315 Universal Counter/Timer .
Section 1-71315
Introduction
SPECIFICATIONS
The 71315 is a digital counter plug-in designed for use with all readout-equipped 7000-Series Oscilloscope mainframes .
It will function in any plug-in compartment ; however, in the vertical compartment, a selectable display is internally con-
nected to the oscilloscope . When used in the horizontal compartment, mainframe triggers are available to the 71315.
The 71315 has eight modes of operation : Frequency-DC to 225 MHz direct, Frequency Ratio-0 to 10 5 :1, Period-
10 ns to 105 s, Period Averaging- 10 ps resolution, TIM- 10 ns to 105 s, TIM Averaging-1 ns accuracy, Totalize-1 to 10 8
events, Manual Stop Watch-to 10 5 s.
The electrical specifications listed in the Performance Requirement column are valid over the stated environmental range
for instruments calibrated at an ambient temperature of +20