Tektronix 314 User manual

TEKTROIXJIX

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 by Tektronix.
Tektronix is not obligated to furnish service under this warranty:
a. to repair damage resulting from attempts by personnel other than Tektronix
representatives to install, repair, or service the product;
b. to repair damage resulting from improper use or from connecting the product to
incompatible e uipment;
c. if personnel other than Tektronix representatives modify the hardware or software.
There is no implied warranty of fitness for a particular purpose. Te tronix is not liable for
consequential damages.
Copyright © 1975 Tektronix, Inc. All rights reserved. Contents of this publication
may not be reproduced i n any form without the written permission of Tektronix, I nc.
Products of Tektronix, Inc. and its subsidiaries are covered by 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 1
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, Calibrator, and Power 8
MEASUREMENT TECHNIQUES 10
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 Ma e Dual-Trace Phase Measurements 18
How to Ma e 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 Blan ing (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
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Fig. 1. Sony-Tektronix 314 Storage Oscilloscope.
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OPERATING INFORMATION
INTRODUCTION
NOTE
The Sony-Tektronix 314 is a dual-channel, 10 MHz portable
storage oscilloscope.
The de to 10 MHz vertical bandwidth provides calibrated
deflection factors from 1 mV to 10 V/graticule div (25 V/div,
or greater, uncalibrated, with VOLTS/DIV VARIABLE in
fully counterclockwise position). A delay line in the verti 
cal system permits observation of that part of the signal
which triggers the sweep.
The horizontal deflection system provides calibrated sweep
rates from 5 s/div to 1 µs/div; and a 10X sweep magnifier to
increase the fastest sweep rate to 0.1 µs/div. Three sweep
modes are available: AUTO, NORM, and SINGLE SWEEP.
The trigger circuit provides a stable display over the full
vertical bandwidth.
External horizontal input provides deflection factors of
20 mV to 2 V/div for X-Y operation.
The ert is a direct-view bistable storage device having an
8 x 10 div internal graticule. Each graticule div e uals 0.25
inch. An enhance mode increases single-sweep writing speed.
An internal 1 kHz calibrator 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 de 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 ert phosphor at slower
sweep speeds.
When changing from sweep speed settings faster than
10 ms to settings of 10 ms and slower, readjust the
I TE SITY 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 both 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
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POWER-SOURCE REQUIREMENTS
AC Power Source Selection
The instrument may be operated on 100, 115, 120, 200,
230, or 240 V ac, from 48 to 440 Hz, or from a +12 or +24
V de 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
1823-02
Fig. 2. Line Voltage and Range Selector switches.
AC-DC
SELECTOR
EXTERNAL
DC SOURCE
1823-03
Fig. 3. AC-DC Selector and DC Power-Source input.
2
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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 Table 1 for regula 
ting ranges. A 115 to 230 V adapter may be re uired for
the power-line cord.
The internal line voltage fuse value must be changed
when changing the nominal line voltage setting.
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
WARNING
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
interna! maintenance procedures.
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 d c power source.
REV. B, MAR. 1977
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3

FUNCTIONS OF CONTROLS, CONNECTORS, AND INDICATORS
VERTICAL
CH 1 VOLTS/DIV (charcoal gray nob). Selects cali 
brated deflection factors from 1 mV/div to 10 V/div
in a 1-2-5 se uence.
GND(middle position). Grounds vertical ampli 
fier input.
DC(in position). Presents all components of in 
put signal to the vertical amplifier.
Accuracy: Within 3% over calibrated range.
CH 2 VOLTS/DIV (silver gray nob). Selects cali 
brated deflection factors from 1 mV/div to 10 V/div
in a 1 -2-5 se uence.
Accuracy: Within 3% over calibrated range.
(T) CH 1 and CH 2 VARIABLE (CAL). Provides uncali 
brated variable deflection factors between calibrated
ranges. Extends uncalibrated range to 25 V/div.
(jT) CH 1 and CH 2 POSITION. Vertically positions the
display.
CH 1 and CH 2 Input Coupling Switch and Indicator.
AC(out position). Blocks d c component of in 
put signal. Low fre uency — 3 dB point is about
10 Hz.
CH 2 INVERT. Button pushed in inverts channel 2
input signal (inverts display).
Fig. 4. Front panel.
4
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