Tektronix 310A User manual

IV IA IM L J A L
Tektronix, Inc.
S.W. Millikan
070-0893-00
Serial Number
TYPE
310M
OSCILLOSCOPE
Way • P. O. Box 00 • Beaverton, Oregon 9700 • Phone [phone] • Cables: Tektronix
669

WARRANTY
All Tektronix instruments are warranted
against defective materials and workman
ship for one year. Tektronix transformers,
manufactured in our plant, are warranted
for the life of the instrument.
Any questions with respect to the war
ranty mentioned above should be taken
up with your Tektronix Field Engineer.
Tektronix repair and replacement-part
service is geared directly to the field,
therefore all requests for repairs and re
placement parts should be directed to the
Tektronix Field Office or representative
in your area. This procedure will assure
you the fastest possible service. Please
include the instrument Type and Serial or
Model Number with all requests for parts
or service.
Specifications and price change privi
leges reserved.
Copyright c 1969 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 permis
sion of the copyright owner.

Type 310A

TYPE 310A OSCILLOSCOPE
SERIAL ^VERTICAL AMP]
------ v
VOLTS/DIV
HORIZONTAL
POSITION
VERTICAL
POSITION
SCALE ILIU M
INTENSITY
FOCUS
, ----- CALIBRATOR
m il M il 10 H««
E BASE
■TlME/DIV.
stability
RIG. IEVEI
M N CA llM A TID
iM I t
«XT
HO tlZ. M isr
ADJUST
TEKTRONIX. INC
LANO. O tfO O N U S-A
Fig. 1-1. The Type 31OA Oscilloscope.
Type 310A

SECTION 1
TYPE 310A SPECIFICATION
Type 310A
Change information, if any, affecting this section will be fo nd at the rear of the man al.
Introduction
The Tektronix Type 310A Oscilloscope is a portable
precision instr ment designed for eq ipment maintenance
or calibration at its point of se. A DC to fo r megahertz
vertical system provides calibrated deflection factors from
0.01 to 50 volts/division (0.01 to 0.05 volts/division AC
co pled only). The trigger circ its provide stable triggering
over the f ll vertical bandwidth. The horizontal deflection
system provides calibrated sweep rates from 0.2 second to
0.5 microsecond/division. A X5 magnifier allows each
sweep rate to be increased five times and provides a maxi
m m sweep rate of 0.1 microsecond/division in the .5 j SEC
position. X - Y meas rements can be made by applying the
vertical (Y) signal to the vertical INPUT connector and the
horizontal (X) signal to the EXT HORIZ INPUT binding
post on the rear panel (Horizontal Display switch set to
EXT HORIZ). The reg lated DC power s pplies maintain
constant o tp t over a wide variation of line voltages and
freq encies. Total power cons mption is abo t 175 watts.
This instr ment will meet the electrical characteristics
listed in Table 1-1 following complete calibration as given
in Section 5. The performance check proced re given in
Section 5 provides a convenient method of checking instr 
ment performance witho t making internal checks or
adj stments. The following electrical characteristics apply
over a calibration interval of 500 ho rs after a warm p time
of 20 min tes.
TABLE 1-1
ELECTRICAL
Vertical Deflection System
Characteristic Performance Characteristic Performance
Deflection Factor
Calibrated range
.01,.02 and .05
volts/division
(AC only)
3.5 megahertz or greater.
DC co pled 0.1 volt/division to 50 volts/
division in 9 steps. Steps in 1-2-5
seq ence.
Lower —3 dB point,
AC (capacitive) co 
pled
AC co pled 0.01 volt/division to 50 volts/
division in 12 steps. Steps in
1-2-5 seq ence.
Witho t probe Two hertz or less.
With probe 0.2 hertz or less.
Risetime
Acc racy Within 3% of indicated deflec
tion factor.
.1 to 50 volts/
division Approximately 90 nanoseconds.
Uncalibrated (vari
able) range Contin o sly variable between
steps. Extends maxim m ncali
brated deflection factor to at
.01, .02 and .05
volts/division
(AC only)
A pproxim a tely 100 nano
seconds.
least 125 volts/division. Inp t Co pling AC (capacitive) and DC (direct)
Bandwidth
Upper -3 dB point,
AC (capacitive) and
DC (direct) co pled
.1 to 50 volts/
co pled. Selected by front-panel
Inp t Co pling switch.
Fo r megahertz or greater.
Maxim m Inp t Voltage
Inp t RC Characteristics
Resistance
600 volts + peak AC.
One megohm.
division Capacitance 40 picofarads.
1-1

Specification-Type 310A
Characteristic Performance
Triggering
Trigger So rce Internal, external, or line.
Selected by TRIGGER switch.
Trigger Co pling AC (capacitive) or DC (direct)
co pled. Selected by Trigger
Co pling-Mode switch.
Trigger Polarity Sweep can be triggered from
positive-going or negative-going
portion of trigger signal.
Selected by TRIGGER switch.
Trigger Mode Man al trigger adj stable for
desired level or a tomatic trig
gering at average level of trigger
ing waveform with free-r nning
sweep at 50 hertz repetition rate
in absence of adeq ate trigaer
signal. Selected by Trigger
Co pling-Mode switch.
Trigger Sensitivity
Internal (minim m for
stable triggering)
AC 0.25 division of deflection mini
m m, 30 hertz to one kilohertz;
increasing to two divisions at
fo r megahertz. Typical —3 dB
point, 16 hertz.
DC 0.25 division of deflection mini
m m, DC to one kilohertz;
increasing to two divisions at
fo r megahertz.
AUTO 0.25 division of deflection mini
m m, 60 hertz to one kilohertz;
increasing to two divisions at
two megahertz.
External (minim m
signal for stable
triggering)
AC 0.2 volt minim m, 30 hertz to
one kilohertz; increasing to two
volts at fo r megahertz. Typical
—3 dB point, 16 hertz.
DC 0.2 volt minim m, DC to one
kilohertz; increasing to two volts
at fo r megahertz.
AUTO 0.2 volt minim m, 60 hertz to
one kilohertz; increasing to two
volts at two megahertz.
External Trigger Inp t
Inp t Resistance Approximately one megohm.
Characteristic Performance
Time Base
Sweep Rate
Calibrated range 0.5 microsecond to 0.2 second/
division in 18 steps. Steps in
1 -2-5 seq ence. Each sweep rate
can be increased five times with
the X5 magnifier. Extends fast
est sweep rate to 0.1 micro-
second/division.
Unmagnified time
meas rement ac
c racy over center
eight divisions of
gratic le
Within 3% of indicated sweep
rate.
Magnified time meas
rement acc racy
over center eight
divisions of grati
c le (eq ivalent
magnified sweep
rates given)
0.2 microsecond to
40 millisecond/
division
Within 4% of eq ivalent magni
fied sweep rate.
0.1 microsecond/
division Within 5% of eq ivalent magni
fied sweep rate.
Uncalibrated (vari
able) range Contin o sly variable sweep rate
between steps. Extends slowest
ncalibrated sweep rate to at
least 0.5 second/division.
External Horizontal Operation
Deflection Factor 1.5 volt/division, or less, with
HO RIZ GAIN control f lly
clockwise.
X Bandwidth at Upper
—3 dB Point, DC
(direct) co pled
At least 500 kilohertz.
Inp t Resistance Approximately 100 kilohms.
Calibrator
Wave shape Sq are wave.
O tp t Voltage 0.5 to 100 volts peak to peak in
1 1 steps. Steps in 1-2-5 se
q ence.
Voltage Acc racy Within 3% of indicated o tp t
voltage.
Repetition Rate Approximately one kilohertz.
1-2

Specification—Type 310A
Characteristic Performance
Power S pply
Line Voltage Range
110 volts nominal
117 volts nominal
124 volts nominal
220 volts nominal
234 volts nominal
248 volts nominal
99 to 117 volts.
105 to 124 volts.
111 to 132 volts.
198 to 234 volts.
210 to 248 volts.
222 to 264 volts.
Line Freq ency 50 to 800 hertz (increase line
voltage abo t 4% for correct
reg lation at 800 hertz).
Power Cons mption Approximately 175 watts.
Cathode-Ray T be (CRT)
Gratic le
Type External with variable edge light
ing.
Area Eight divisions vertical by 10
divisions horizontal. Each divi-
sion eq als 0.25 inch.
Characteristic Performance
Beam Mod lation 20 volts peak to peak connected
to CRT CATHODE binding
posts provides trace mod lation
at normal intensity.
TABLE 1-2
PHYSICAL
Dimensions (meas red at
maxim m points)
Height 10 7/8 inches (27.6 centi
meters).
Width 6 15/16 inches (17.6 centi
meters).
Depth 17 11/16 inches (44.9 centi
meters).
Finish Anodized fro n t panel and
chassis. Bl e vinyl painted
cabinet.
STANDARD ACCESSORIES
Standard accessories s pplied with the Type 310A are
listed in the Mechanical Parts List at the rear of this man al.
For optional accessories available for se with this instr 
ment, see the Tektronix, Inc. catalog.
7-3

NOTES

SECTION 2
OPE ATING INST UCTIONS
Type 310A
Change information, if any, affecting this section will be found at the rear of the manual.
General
To effectively se the Type 310A, the operation and
capabilities of the instr ment m st be known. This section
describes the operation of the front-panel controls, gives
first-time and general operating information and lists some
basic applications.
Power Requirements
The Type 31OA can be operated from either a 117-volt
or a 234-volt nominal line-voltage so rce. Two a xiliary
windings in addition to the standard windings allow the
nominal primary voltage to be increased or descreased in
steps of seven volts from 117-volts nominal (to provide
110, 117 or 124 volt nominal operation) or 14 volt steps
from 234-volts nominal (to provide 220, 234 or 248-volt
nominal operation). As the nominal operating voltage is
changed, the reg lating range of the power s pply changes
also, to provide reg lated o tp t voltages with inp t line
voltages abo t 10% lower and 6% higher than the nominal
voltage. The reg lating range for each line voltage that this
instr ment can be wired for is as follows.
110-volts nominal
117-volts nominal
124-volts nominal
220-volts nominal
234-volts nominal
248-volts nominal
99 - 117 volts
105-124 volts
111 -132 volts
198 - 234 volts
210 -248 volts
222 - 264 volts
This instr ment will reg late over a line freq ency range
of 50 to 800 cycles. For correct reg lation at 800 cycles,
increase the minim m line voltage req irement abo t 4%.
Power cons mption is approximately 175 watts. To convert
to a different line voltage than the one for which the instr 
ment is wired, se the following proced re.
1. Disconnect the instr ment from the power so rce.
2. Connect the transformer for the desired line voltage
as shown in Fig. 2-1.
Mm-
99-117
volt*
193-234
volt*
^ ........................ — ^
l 87654321 J
N. __ A
^ 87654321 j
105-124
volts
117-Volt Nominal Connection*
□ c
111-132
volts
j t
k. 87654321 J 87654321 j
210-248
volts
230-Volt Nominal Connections
222-264
volts
2-1
Fig. 2-1. Power transformer primary connections.

Operating Instructions-Type 310A
2-2
Fifl. 2-2, Front- and rear-panel controls and connectors.