Tektronix 314 User manual

WARRANTY
Tektronix warrants that this product is free from defects in materials and workmanship. The
warranty period is one (1) year from the date of shipment. Tektronix will, at its option, repair or
replace the product if Tektronix determines it is defective within the warranty period and if it is
returned, freight prepaid, to a service center designated y Tektronix.
Tektronix is not o ligated to furnish service under this warranty:
a. to repair damage resulting from attempts y personnel other than Tektronix
representatives to install, repair, or service the product;
. to repair damage resulting from improper use or from connecting the product to
incompati le equipment;
c. if personnel other than Tektronix representatives modify the hardware or software.
There is no implied warranty of fitness for a particular purpose. Tektronix is not liable for
conse uential damages.
Copyright © 1975 Tektronix, Inc. All rights reserved. Contents of this pu lication
may not e reproduced in any form without the written permission of Tektronix, Inc.
Products of Tektronix, Inc. and its su sidiaries are covered y U.S. and foreign
patents and/or pending patents.
TEKTRONIX, TEK, SCOPE-MOBILE, and
Tektronix, Inc. are registered trademarks of
Printed in U.S.A. Specification and price change privileges are reserved.
070-1823-00 First Printing Jan 1975

TABLE OF CONTENTS
PAGE
OPERATING INFORMATION i
Introduction 1
Safety Information 1
Power-Source Requirements 2
AC Power Source Selection 2
DC Power Source Selection 3
FUNCTIONS OF CONTROLS, CONNECTORS,
AND INDICATORS 4
Vertical 4
Display 5
Triggering 7
Horizontal, Cali rator, and Power 8
MEASUREMENT TECHNIQUES io
Triggering the Sweep 10
Triggering Internally on the Input Signal 10
Triggering from an External Source 11
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TABLE OF CONTENTS (cont)
PAGE
Internal and External Sweep 11
X-Y Displays 12
Using External Sweep Voltage 12
Selecting Sweep Rate and Use of the Magnifier 12
Signal Application to Vertical Input 13
How to Measure Voltage 14
AC Signals 14
Instantaneous Voltage Measurement 15
Voltage Comparison 15
How to Measure Time 16
Risetime 16
Delay Time 17
How to Measure Frequency 17
How to Measure Phase 18
How to Make Dual-Trace Phase Measurements 18
How to Make High-Resolution Phase Measurements 19
How to Measure Common-Mode Rejection 19
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TABLE OF CONTENTS (cont)
PAGE
How to Use External Blanking (Z-Axis or Intensity Modulation) 20
How to Store a Display 21
Using Enhanced Mode 22
Integrated Fast-Rise Waveforms 22
Care of Storage CRT 23
Some Common Operational Errors 23
iii
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Fig. 1. Sony-Tektronix 314 Storage Oscilloscope.
314 Operators

OPERATING INFORMATION
NOTE
INTRODUCTION
The Sony-Tektronix 314 is a dual-channel, 10 MHz porta le
storage oscilloscope.
The dc to 10 MHz vertical andwidth provides cali rated
deflection factors from 1 mV to 10 V/graticule div (25 V/div,
or greater, uncali rated, with VOLTS/DIV VARIABLE in
fully counterclockwise position). A delay line in the verti
cal system permits o servation of that part of the signal
which triggers the sweep.
The horizontal deflection system provides cali rated sweep
rates from 5 s/div to 1 /us/div; and a 10X sweep magnifier to
increase the fastest sweep rate to 0.1 jus/div. Three sweep
modes are availa le: AUTO, NORM, and SINGLE SWEEP.
The trigger circuit provides a sta le display over the full
vertical andwidth.
External horizontal input provides deflection factors of
20 mV to 2 V/div for X-Y operation.
The crt is a direct-view ista le storage device having an
8 x 10 div internal graticule. Each graticule div equals 0.25
inch. An enhance mode increases single-sweep writing speed.
An internal 1 kHz cali rator is connected internally to the
vertical inputs and to a front-panel connector.
The 314 is operated from a line voltage of 100, 115, 120,
200, 230, or 240 V ac, 48 to 440 Hz, or from a +12 or
+24 V dc source.
The 314 automatically reduces the display intensity
level when sweep speeds of 10 ms and slower are
selected. This reduces the possibility of accidentally
burning the sensitive storage crt phosphor at slower
sweep speeds.
When changing from sweep speed settings faster than
10 ms to settings of 10 ms and slower readjust the
INTENSITY control setting as necessary for a visible
display.
SAFETY INFORMATION
The instrument is designed to operate from a single-phase
power source having one of the current-carrying conductors
(the neutral conductor) at ground (earth) potential. Oper
ation from power sources where oth current-carrying
conductors are live with respect to ground (such as phase-
to-phase on a three-wire system) is not recommended since
only the line conductor has overcurrent (fuse) protection
within the instrument.
The instrument has a three-wire power cord with a three-
terminal polarized plug for connection to the power source
and safety earth. The ground (earth) terminal of the plug
is directly connected to the instrument frame. For elec
tric shock protection, insert this plug into only a mating
outlet with a safety earth contact.
REV. A, DEC. 1975 314 Operators 1

POWER-SOURCE REQUIREMENTS AC Power Source Selection
The instrument may e operated on 100, 115, 120, 200,
230, or 240 V ac, from 48 to 440 Hz, or from a +12 or +24
V dc source.
The 115 to 230 V Line-Voltage and Regulating Range
Selectors are located on the rear panel, as shown in Fig. 2.
The AC-DC Selector switch is located on the right-side
panel, as shown in Fig. 3.
This instrument may be damaged if operated
with the Line-Voltage and Regulating-Range
Selector switches set for the wrong applied
line voltage.
To convert from one nominal line-voltage range to the other,
move the Line-Voltage and Regulating-Range Selector
Fig. 2. Line Voltage and Range Selector switches. Fig. 3. AC-DC Selector and DC Power-Source input.
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switches (see Fig. 2) to indicate the correct nominal ac line
voltage. Be sure that the AC-DC Selector switch (see Fig.
3) is in the 115 V/230 V position. See Ta le 1 for regula
ting ranges. A 115 to 230 V adapter may e required for
the power-line cord.
The internal line voltage fuse value must be changed
when changing the nominal line voltage setting.
WARNING I
Dangerous potentials exist at several points through
out the interior of this instrument. Refer to the 314
Service manual for precautions and procedures con
cerning cabinet removal fuse replacement and nomi
nal line voltage selection. Only qualified service
personnel should attempt fuse replacement or other
internal maintenance procedures.
TABLE 1
Regulating-Range
Selector Position
Nominal Regulating Range
115 V 230 V
LO 100 V ±10 V 200 V ±20 V
M 115 V ±11.5 V 230 V ±23 V
HI 120 V ±12 V 240 V ±24 V
DC Power Source Selection
Move the AC-DC Selector switch (see Fig. 3) to the appro
priate DC position (11 V—14 V or 22 V—28 V). Connect
the DC Input connectors (+ and —) to the dc power source.
REV. B, MAR. 1977 314 Operators 3