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IVIAIMUAL 



Serial Number 




Tektronix, Inc. 

S.W. Millikan Way • P. O. Box 500 • Beaverton, Oregon 97005 • Phone 644-0161 • Cables: Tektronix 
070-465 265 





WARRANTY 

All Tektronix instruments are warranted 
against defective materials and workman- 
ship for one year. Tektronix transformers, 
manufactured in our own plant, are war- 
ranted for the life of the instrument. 

Any questions with respect to the war- 
ranty mentioned above should be token up 
with your Tektronix Field Engineer. 

Tektronix repair and replacement-part 
service is geared directly to the field, there- 
fore all requests for repairs and replace- 
ment parts should be directed to the Tek- 
tronix Field Office or Representative in your 
area. This procedure will assure you the 
fastest possible service. Please include the 
instrument Type and Serial number with all 
requests for parts or service. 

Specifications and price change priv- 
ileges reserved. 

Copyright ,c 1965 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 114 







Section 1 



CONTENTS 



Warranty 



Characteristics 



M 






Section 2 



Operating Instructions 



Section 3 



Section 4 



Circuit Description 



Maintenance and Calibration 





















Section 5 



Parts List and Diagrams 



A list of abbreviations and symbols used in this 
manual will be found on page 5-1. Change in- 
formation, if any, is located at the rear of the 
manual. 






Type 114 




SECTION I 

CHARACTERISTICS 



Introduction 

The Type 114 Pulse Generator is a general purpose pulse 
generator. Transistorized circuitry is used throughout, with 
most of the components being mounted on an etched circuit 
board. 

The Type 114 Pulse Generator is versatile. The repetition 
rate, width, and amplitude of the output pulse are individual- 
ly selectable by range and by variable control within each 
range. Front-panel connectors are provided for the pulse out- 
put, trigger output, and external trigger input. A single front- 
panel switch selects both the amplitude range and polarity 
of the output pulse. The trigger output pulse is set by a front- 
panel switch to occur on the desired edge (leading or trailing) 
of the output pulse. In cases where the Type 114 is set for a 
pulse width longer than the pulse repetition period, a built- 
in feature automatically counts down the repetition rate to 
permit the width of the output pulse to remain at the value 
selected (such operation is indicated by a Width > Period 
light). In addition, two Type 114’s can be connected together 
so that the output pulse of the second unit is delayed by the 
pulse width (up to 10 ms) of the first unit. 



Electrical 



short circuiting the OUTPUT connector will not damage the 
instrument. 

WARNING 

The Type 114 should never be connected to an inductive 
load, or any load that will produce a current which will feed 
back into the instrument. 



TABLE 1-1 


Amplitude 


Pulse 


Pulse 


Range 


on 


off 


±1 to 3 V 


zz 20fl 


19 0 to 22 0 


±3 to 10 V j 


28 O to 48 12 


30 O to 95 12 



External Trigger Input. External triggering requires a 
positive trigger signal of 2 to 20 volts and having a risetime 
of 1 jusec or less. Triggering signals up to 2 Me may be used. 

Trigger Output. The trigger output pulse into an open 
circuit is approximately 3 volts; into a 50 ft termination, the 
trigger output pulse is approximately ] / 2 volt. A front-panel 
switch allows the output trigger pulse to be set to occur at 
the leading edge or the trailing edge of the main pulse. 



Pulse Period. The PERIOD switch and associated VARI- 
ABLE control provide continuously variable pulse periods 
from 1 fisec to 100 msec (pulse repetition rates from one mil- 
lion pulses per second to 10 pulses per second). An EXTER- 
NAL TRIGGER position on the PERIOD switch permits exter- 
nal control of the pulse period. With the VARIABLE control 
at the CAL end of its range and the WIDTH > PERIOD light 
unlit, the period accuracy is within ±3% of the indicated 
value. Jitter is typically less than 0.05% of pulse period 
+ 2 ms. 

Pulse Width. The WIDTH switch and associated VARI- 
ABLE control provide continuously variable pulse widths from 
100 nsec to 10 msec. With the width VARIABLE control at 
the CAL end of its range, the width accuracy is within 
±3% of indicated value. Jitter is typically less than 
0.05% plus V 2 nsec. An additional SQUARE WAVE 
position on the WIDTH switch disables the variable width 
feature and changes the output to a square wave whose 
repetition rate is determined by the PERIOD controls. 
Period error in the square wave mode is < ±5%. 

Output Polarity and Amplitude. The AMPLITUDE switch 
provides for either polarity output with two amplitude ranges 
(1 V to 3 V and 3 V to 10 V). The VARIABLE control permits 
the output to be varied within the voltage ranges. Aber- 
rations (overshoot, rolloff, preshoot, or ringing) amount to 
less than 5% at maximum amplitude. 

Output Impedance. The output Impedance of the Type 
114 is given in Table 1-1. The figures given are typical and 
are dependent upon the setting of the AMPLITUDE — VARI- 
ABLE control. Load impedance is not critical. Temporarily 



Input Power Requirements. ~ 15 watts; 50 to 400 cps, 
94.5- to 137.5- or 189- to 275- volts, ac. 

Warm-up Time at -j-25°C ±5°C. Five minutes for rated 
accuracies. 

Environmental 

Operating 

Temperature 
Altitude 

Non-Operating 

Temperature 
Altitude 

Mechanical 

Dimensions 

Connectors 

Accessories 

See standard accessory lists in this manual for accessories 
supplied with each instrument. For optional accessories, see 
the current Tektronix, Inc. catalog. 



0°C to +50°C 

15.000 feet maximum 

— 40°C to +65°C 

50.000 feet maximum 

Approximately 9" X 6" X 
12y 2 " overall 

Front-panel connectors are 
BNC type. 






1-1 




Characteristics — Type 114 



GLOSSARY OF TERMS 

Bistable A circuit that has two stable states and 

(multivibrator) requires two input pulses to complete a 
cycle. 

Calibrate To check or correct the graduation ac- 

curacy of quantitative indicators. 

CAL (calibrated) An index position to which an otherwise 
position ungraduated control is set when a quanti- 

tative measurement must be made. 

Catching or Establishes the + or — extremity of a volt- 
clamping age excursion, 

diode 

Count-down (of A circuit, such as a bistable, whose output 
pulses) circuit consists of pulses fewer in number (usu- 
ally a submultiple) than the pulses applied 
to the input(s). 

Delayed pulse A pulse occurring after a preselected in- 
terval following an event used as a time 
reference point. 

Delayed trigger Generally, a narrow, delayed pulse. 

Duty factor For periodic pulses, the duty factor (often 

(of pulses) called duty cycle) is equal to the duration 

(width) of a pulse divided by the pulse 
period. 

Enabling pulse A pulse which opens a normally closed 
electric gate, or otherwise permits an oper- 
ation for which a pulse input is a neces- 
sary condition. 

External trig- An enabling pulse derived from a source 

ger (pulse) external to the circuit or equipment where 

a particular operation requires an enabling 
pulse with certain characteristics (time de- 
layed, duration, etc.). 

Falltime The time required by pulse waveform to 

fall from 90% of its maximum value to 
10% of its maximum value. Not neces- 
sarily equal to risetime. 

Jitter Short-duration instability (of a signal); ran- 

dom small departures from regularity. 

KPPS Kilopulses per second. 

Monostable A circuit having one stable and one semi- 

(multivibrator) stable state. A trigger pulse drives the 

circuit into the semistable state, where it 
remains for a predetermined time before 
returning to the stable condition. 



MPPS 


Megapulses per second. 




Overshoot 


When changing from one voltage level to 
another, a momentary excursion greater 
than the change desired. 


— . 


PPS 


Pulses per second. 




Preshoot 


A small negative excursion immediately 
preceding a positive-going pulse, or vice 
versa. 


— 


Pulse amplitude 


The amplitude of a pulse is any term indi- 
cating the magnitude of the pulse. 


— 


Pulse duration 


The time interval between the first and 
last instants at which the pulse voltage (or 
current) reaches some specified percentage 
of the peak voltage (or current) of the 
pulse. 


— 


Pulse period 


The pulse period in a sequence of periodic 
pulses is the elapsed time between any 
given point on one of the pulse waveforms 
and the same point on the following pulse. 


— 


Pulse Repeti- 
tion Frequency 


The number of periodic pulses that occur 
in a given unit of time. Also expressed as 
pulse repetition rate. 


— • 


Pulse width 


See pulse duration. 




Quiescent 


At rest — specifically, the condition of a 
circuit when no input signal is being ap- 
plied and/or no change is taking place. 




Ramp voltage 


A voltage waveform that rises at a steady 
rate. For example, at 10 volts per second. 




Ringing 


High-frequency damped oscillations caused 
by shock excitation of high-frequency res- 
onances, or, a damped oscillation in the 
output signal of a system as a result of a 
sudden change in the input signal. 


— ■ 


Risetime 


The risetime of a pulse is taken as the time 
required for the leading edge of the pulse 
to increase from 10% of its maximum 
value to 90% of its maximum value. 




Sampling 

system 


A method that takes amplitude samples 
from a repetitive input signal with each 
sample at a progressively later time, then 
reconstructs these samples into a replica of 
the original waveform at a much lower 
frequency. 


— 


Trigger 


A signal that starts action in another 
circuit. 





1-2 







SECTION 2 

OPERATING INSTRUCTIONS 



Front-Panel Controls, Indicators, and Connectors 
(See Fig. 2-1.) 

The function of each item on the Type 114 front panel is 
given in the following tabulation. 

POWER 

Switch This toggle switch completes the circuit 

to the primary of the power transformer. 

Indicator The white lamp to the right of the POWER 
switch lights when the Type 114 is en- 
ergized. 



PERIOD 

Switch 



VARIABLE 

Control 



EXTERNAL 
TRIGGER- 
INPUT Con- 
nector 

WIDTH 

Switch 



VARIABLE 

Control 



WIDTH > 
PERIOD In- 
dicator light 



This switch selects the basic range of 
pulse period. When the switch is set to 
EXTERNAL TRIGGER — INPUT, the Type 
114 provides width and amplitude control 
for externally generated pulses applied to 
the INPUT connector. Note that “100 mS” 
does not indicate a switch position, but 
is instead an index for the VARIABLE 
control. 

This control has a range of 10:1 or more, 
and provides continuous coverage between 
the steps of the PERIOD switch. 

BNC connector to which the external trig- 
ger is applied when externally triggering. 



This switch selects the basic ranges of 
pulse width. Note that the word “10 mS" 
does not indicate a switch position, but is 
instead an index for the associated VARI- 
ABLE control. 

When the WIDTH switch is set to SQUARE 
WAVE, the output of the Type 114 is a 
square wave whose period is selected by 
the PERIOD controls. 

This control provides continuous cover- 
age between the steps of the WIDTH 
switch and has a range of 10:1 or greater. 

With the flexibility provided, it is possible 
to set the controls so that the width of the 
pulse selected exceeds the period selected. 
When this occurs, the Type 114 counts 
down the repetition rate and lights the 
WIDTH > PERIOD light. The pulse width 
remains as selected, but the pulse period 
is no longer that selected by the PERIOD 
controls. 



AMPLITUDE 



Switch 


Selects the two basic voltage ranges and 
the polarity of the output signal. 


VARIABLE 

Control 


Provides for varying the output amplitude 
within the range selected by the AMPLI- 
TUDE switch. 


OUTPUT 

Connector 


BNC connector from which the output is 
taken. 


TRIGGER 




Switch 


This switch permits the operator to select 
the edge of the output pulse at which the 
trigger pulse occurs. 


Connector 


BNC connector from which the trigger 
pulse output is taken. 



First Time Operation 

The following procedures are designed to acquaint the 
operator with the operation of the Type 114. 

1. Set the three VARIABLE controls extreme counterclock- 
wise. Set the PERIOD switch to 100 jaS, the WIDTH switch to 
SQUARE WAVE, and the AMPLITUDE switch to the “ + 1 TO 
+3V” position. 

2. Connect the OUTPUT connector of the Type 114 to the 
vertical input of an oscilloscope (Tektronix Type 547/1 A1 or 
equivalent) by means of a 50 Q coaxial cable. Terminate 
the coaxial cable at the oscilloscope end with a 50 Q ter- 
mination (Tektronix Part No. 011-049 or equivalent). Make 
sure the input voltage switch is set to match the voltage of 
the power source in use (115 or 230 V ac). See Fig. 2-2. At- 
tach the power cord. 

3. Apply power to the Type 114 and the oscilloscope. Set 
the oscilloscope TIME/DIV or TIME/CM switch to .1 mSEC 
and obtain a stable display. 

4. Set the WIDTH switch to 10 juS. Turn the associated 
VARIABLE control clockwise and note the increase in pulse 
width. When the control is turned so that the pulse width 
exceeds 100 ju S, the WIDTH > PERIOD lamp lights. 

5. Operate the PERIOD, WIDTH, and AMPLITUDE switches 
and controls throughout their ranges and check the results 
with the oscilloscope. 



Using the Type 114 as a Source of Delayed 
Trigger 

The use of the Type 114 as a source of delayed trigger 
may be demonstrated as follows: 

1. Apply a 1 Kpps signal (such as the output of the oscillo- 
scope calibrator) through a BNC T connector and appro- 
priate coax cables to the external trigger input connectors of 



® 



2-1 




Operating Instructions — Type 114 



both the Type 114 and the oscilloscope (see Section 1 for 
external trigger characteristics required). 

2. Obtain an externally triggered sweep on the oscillo- 
scope. 

3. Connect a coaxial cable between the TRIGGER OUT- 
PUT connector of the Type 114 and the vertical input of the 
oscilloscope. 

4. Turn the Type 114 PERIOD switch to EXTERNAL TRIG- 
GER. Set the WIDTH switch to 100 /aS. Turn the WIDTH 
variable control to CAL. Set the oscilloscope VOLTS/CM 
switch to 1 volt. Set the TIME/CM switch to .1 mSEC. 

5. Set the Type 114 TRIGGER switch to TRAILING EDGE. 
A narrow trigger pulse approximately 3 volts in amplitude 



should be visible approximately 1 cm from the start of the 
oscilloscope trace. 

6. Turn the WIDTH — VARIABLE control and note that the 
displayed trigger pulse can be delayed from 10 /xsec to more 
than 100/jtsec from the start of the trace. By using the 5 
basic ranges of the WIDTH switch and by turning the as- 
sociated VARIABLE control, it is possible to delay the trigger 
pulse over a range from approximately 150 nanoseconds to 
10 milliseconds. 

Switching the Power Transformer Primary Con- 
nections 

A switch on the rear of the Type 114 chassis permits 
switching the power transformer connections for operation on 
either 94.5-137.5 (115 V ac nominal) or 189-275 volts ac (230 
V ac nominal). Be sure the correct fuse is installed. 



2-3 




NOTES 




SECTION 3 

CIRCUIT DESCRIPTION 



Introduction 

This section contains the theory of operation of the various 
circuits in the Type 114. The text is supplemented by two 
block diagrams inserted in the text and by schematics in 
Section 5. The reader should follow the circuits on the dia- 
grams as they are presented in the text. 

CAUTION 

There is no fixed chassis ground for the circuit 
board used in the Type 114. A common negative 
point is used instead. This permits changing the 
polarity of the output by grounding the appro- 
priate side of the power supply. For this reason, 
always connect probe grounds to the main chassis 
rather than to a point on the circuit board. 



Period Generator 

The Period Generator (see Fig. 3-1) supplies the trigger 
pulse which activates the Width Generator. The trigger pulse 
is generated internally, or is derived from an externally gen- 
erated triggering signal, depending upon the setting of the 
PERIOD switch. 

Internal Operation. When the Type 114 is operating in 
the internally triggered modes, the operation of the Period 
Generator is as follows: 

Transistors 0115 and Q125 in conjunction with the ap- 
propriate RC timing combination form a free running oscil- 
lator. At the start of a cycle of operation, Q115 is biased off 
and Q125 is biased slightly on. The charge on timing ca- 
pacitor Cl 15 has been removed by the preceding cycle and 
now starts charging toward a common point voltage at an RC 
rate. As the timing capacitor charges, the voltage across it 
reaches a point where it turns on diode Dll 4 and transistor 
Q115. At this instant the circuit becomes regenerative with 
Q115 turning Q125 on hard, which in turn biases Q115 into 
heavy conduction. The heavy conduction of Q115 removes 
the charge accumulated on timing capacitor C115 and ends 
the cycle. 

At the instant Q125 is turned on hard by Q115, the steep 
wave-front is coupled through R131 and Cl 31 to the base of 
Q134, and thence to pulse transformer T131. The pulse out- 
put of T131 is in the order of 20 nanoseconds in width. 

External Trigger Operation. When the Type 114 is op- 
erating in the externally triggered mode, the Pulse Generator 
functions as a pulse shaper. Period switch SW120 discon- 
nects the base of Q115 from the collector of Q125 and re- 
connects it to the external trigger input circuit. SW120 also 
connects the base of Q125 to +25 volts through R121 and 
disconnects the timing capacitor from the circuit. Under 
these conditions none of the transistors in the Period Gen- 
erator are conducting. A positive pulse of 2 to 20 volts in 
amplitude and having a risetime of 1 microsecond or less 
is required at the EXTERNAL TRIGGER — INPUT connector 



in order to make the transistors conduct and deliver the 
proper pulse to the Width Generator. 

When a pulse having the proper amplitude and risetime is 
applied to the EXTERNAL TRIGGER-INPUT connector, 
Q115 is biased into conduction and in turn biases Q125 
and Q134 into conduction. The resulting pulse at the pri- 
mary of T131 has a risetime of about 10 nanoseconds. 

Width Generator 

The Width Generator receives the trigger pulses from 
T131 and generates pulses of the desired width. The out- 
put of the width generator is applied to the Trigger Out 
Circuit and to the Output Amplifier. Except when operat- 
ing in the square wave mode, the Width Generator 
operates as a monostable multivibrator; in the square wave 
mode the Width Generator functions as a bistable. 

Normal Operation. In norma! operation transistors 
Q205 and Q215 form a bistable network whose output 
drives ramp transistor Q224, trigger output transistor Q234, 
and the output amplifier. Q205 is the normally "on” tran- 
sistor. The arrival of a negative trigger pulse from T131 
cuts off Q205. Q215 now conducts and cuts off Q224, 

permitting the voltage at the collector of Q224 to start 
charging ramp capacitor Cl 95. When the selected ramp 
capacitor reaches the desired voltage, D193 is forward 
biased and transistor Q194 is biased into conduction. The 
conduction of Q194 increases the conduction of Q1 84 and 
thereby biases Q205 back into conduction. The conduction 
of Q205 ends the output pulse. Turning on Q205 turns 
off Q215 and turns on Q224. The conduction of Q224 dis- 
charges the ramp capacitor. 

When the ramp capacitor is discharged down to about 
0.3 volt, Q174 turns off and Q164 is turned on. Transistors 
Q1 64 and Q174, diodes D136 and D161, and pulse trans- 
former T131 function as a pulse steering circuit. With Q164 
on, the pulse from the Period Generator via T131 triggers 
the width monostable circuit on, generating an output pulse. 
As soon as the ramp capacitor reaches approximately 0.3 
volt, Q174 conducts and turns Q164 off. Turning off Ql 64 
reverse biases D161, while turning on Q174 biases D136 
near zero. If the Period Generator produces a pulse while 
these conditions exist, that is, whenever the ramp capacitor 
has a charge above approximately 0.3 volt, the pulse is 
steered to the WIDTH > PERIOD light circuit. This mono- 
stable circuit is actuated by the pulse from T131, turning 
off Q145 and turning Q155 on, lighting the WIDTH > 
PERIOD light. Turning on Q155 causes Cl 55 to discharge 
through T131 and R136. When C155 is discharged, D141 
and Q145 conduct and reset the circuit, making it ready 
for another pulse. 

Square Wave Mode. When the Type 114 is operated 
in the Square Wave Mode (see Fig. 3-2), the Width Gen- 
erator operates as a bistable and requires two trigger pulses 
from the Period Generator for each cycle of operation. 
Consequently, the RC network in the Period Generator is 






3-1 




Circuit Description — Type 114 




Fig. 3-1. Type 114 block configuration for pulse output. 



reduced to half its normal value so that the Period Gen- 
erator can deliver twice the usual number of output pulses. 
This procedure ensures that the period indicated by the 
PERIOD switch remains valid for square-wave operation. 
(When external triggering is used, the period of the square 
wave is twice that of the triggering signal, since the Width 
Generator is functioning as a bistable and requires two 
pulses for each cycle of operation.) 

In the Width Generator, the ramp circuit is disabled by 
D196, which means that the comparator consisting of D193, 
Q194, and Q184 is not used. Resetting of the width bistable 
is accomplished by applying the output of WIDTH > PERI- 
OD light driver transistor Q155 to the base of Q125. 

At the instant of turn on when operating in the square- 
wave mode, D177 reverse biases and Q174 is biased on. 
Q174 turns off Q164 and zero biases steering diode D136. 
Under these conditions, the first pulse from the Period Gen- 
erator forward biases D136 and turns off Q145. Turning off 
Q145 turns on Q155, which in turn cuts off Q215 and makes 
Q205 the conducting transistor in the bistable. Turning 
off Q215 also biases Q224 into conduction which switches 
the steering circuit so that D161 becomes zero biased. The 
second pulse from the Period Generator is steered to Q205, 
switching the bistable and the steering circuit. Thus the 
output of the bistable is a symmetrical square wave. 

Trigger Output Circuit 

Trigger output transistor Q234 normally operates in satura- 
tion due to the current through R232. Whenever the sig- 



nal selected by the TRIGGER switch goes negative, the volt- 
age change is coupled through C231 to the base of Q234 
and momentarily takes it out of saturation. When this hap- 
pens, the collector voltage of Q234 rises sharply until it 
reaches ~ V/ 7 volts and forward biases catcher diode 
D236. The resulting trigger output through C236 is about 
80 nanoseconds wide and is limited to ~ +3 volts into 
an open circuit, or to 10 ma into a short circuit. 

The TRIGGER switch permits selecting the edge of the 
output waveform at which the trigger occurs. By setting 
the switch to TRAILING EDGE, the Type 114 may be used 
as a delay generator with the WIDTH controls setting the 
amount of delay. 



Output Amplifier 

The two-stage output amplifier consists of driver transistor 
Q244 and the parallel-connected output transistors Q254 
and Q264. When negative output pulses are desired, the 
output transistors are connected common emitter and the 
-|-25-volt supply is connected to chassis ground displacing 
the circuit board common ground 25 volts negative. When 
positive output pulses are desired, the output transistors are 
connected as an emitter follower and the common point is 
connected to chassis ground. Polarity switching of the out- 
put is accomplished by the AMPLITUDE switch. 






3-2 











Circuit Description — Type 114 



EXTERNAL 

TRIGGER 




Fig. 3-2. Type 114 block configuration for square-wave output. 



CAUTION 

Do not connect test probe ground clips to the com- 
mon point of the circuit board while the AMPLI- 
TUDE switch is in either of the negative positions. 
The best procedure is to always connect the test 
probe ground clip to the main chassis and leave 
the AMPLITUDE switch in the positive output posi- 
tions. 

The VARIABLE control associated with the AMPLITUDE 



switch provides continuously variable voltage amplitude 
within the ranges of the AMPLITUDE switch. 

Power Supply 

The power supply consists of a regulated 25-volt supply 
and an unregulated 35-volt supply. The 25-volt supply and 
a 10-volt supply are stacked to obtain the 35-volt supply. 
A rear-panel switch is provided to change transformer pri- 
mary connections when switching from 115- to 230-volt 
operation. 






NOTES 





SECTION 4 
MAINTENANCE AND 
CALIBRATION 



Preventive Maintenance 

Preventive maintenance consists of cleaning, visual inspec- 
tion, lubrication, and if needed, recalibration. Preventive 
maintenance is generally more economical than corrective 
maintenance since preventive maintenance can usually be 
done during idle periods at a time convenient to the user. 
The preventive maintenance schedule established for the 
instrument should be based on the amount of use and the 
environment in which the instrument is used. 

Cleaning. Clean the instrument often enough to prevent 
accumulation of dirt. Dirt on the components acts as an 
insulating blanket (preventing efficient heat dissipation) and 
may provide conducting paths. 

Clean the instrument by loosening the accumulated dust 
with a dry, soft paint brush. Remove the loosened dust by 
vacuum and/or dry, low pressure compressed air (high 
velocity air can damage certain components). Hardened 
dirt and grease may be removed with a cotton-tipped swab 
or a soft cloth dampened with water and a mild detergent 
solution (such as Kelite or Spray White). Abrasive cleaners 
should not be used. 

CAUTION 

Do not permit water to get inside controls or shaft 
bushings. 

Lubrication. The life of potentiometers and rotary switches 
is lengthened if these devices are kept properly lubricated. 
Use a cleaning type lubricant (such as Cramoline) on shaft 
bushings and switch contacts. Lubricate the switch detents 
with a heavier grease (Beacon grease No. 325 or equiva- 
lent). Do not over-lubricate. The necessary materials and 
instructions for proper lubrication of Tektronix instruments are 
contained in a component lubrication kit which may be 
ordered from Tektronix. Order Tektronix Part No. 003-342. 

Visual Inspection. After cleaning, the instrument should 
be carefully inspected for such defects as poor connections, 
damaged parts, and improperly seated transistors. The rem- 
edy for most visible defects is obvious; however, if heat- 
damaged parts are discovered, determine the cause of 
overheating before the damaged parts are replaced. Other- 
wise, the damage may be repeated. 

Transistor Checks. Periodic preventive maintenance 
checks consisting only of removing the transistors from the 
instrument and testing them in a tester are not recommend- 
ed. The circuits within the instrument provide the most 
satisfactory means of checking transistor performance. Per- 
formance of the circuits is thoroughly checked during cali- 
bration so that substandard transistors will be detected at 
this time. Check suspect transistors by substitution. Be sure 
the substituted transistor is the same type as the one re- 
placed, and that the substitute itself is good. If the original 
transistor is found to be good, return it to the same socket 
from which removed. 



Recalibration. Instrument accuracy is ensured if the cali- 
bration of the Type 114 is checked after every 500 hours 
of operation (every six months if the instrument is used inter- 
mittently). Complete recalibration instructions are contained 
later in this section. 

The calibration procedure is helpful in isolating major 
troubles in the instrument. Moreover, minor troubles not 
apparent during regular operation may be revealed and 
corrected during recalibration. 

Corrective Maintenance 

General Troubleshooting. If the instrument is not op- 
erating, attempt to isolate the trouble by a quick opera- 
tional and visual check. Make sure that any apparent 
trouble is actually due to a malfunction within the Type 
114 and not due to improper control settings or a fault in 
associated equipment. 

Operate the front-panel controls to see what effect, if 
any, they have on the trouble symptoms. The normal or 
abnormal operation of each particular control helps in 
establishing the nature of the trouble. The normal function 
of each control is listed in Section 2 of this manual. 

If the trouble cannot be located by means of front-panel 
checks, remove the instrument from its case and check volt- 
ages and waveforms against those shown on the schematics 
in Section 5, starting with the power supply connections. 
Once the trouble is isolated to a particular circuit, refer to 
the circuit description in Section 3 for an explanation of 
how the circuit normally operates. 

CAUTION 

Be careful when making measurements on live 
circuits. The small size and high density of com- 
ponents used in this instrument result in close spac- 
ing. An inadvertent movement of the test probes, 
or the use of oversized probes, may short between 
circuits. 



Helpful Hints: 

1. Check the voltage between chassis ground and the 
top end of R244 (333 ft 10 watt resistor mounted at the 
top-right-rear of the chassis). With normal line voltage, 
the voltage at the top of R244 should read 31 to 35 volts 
if the AMPLITUDE switch is set to +; 6 to 10 volts if the 
switch is set to — . 

2. Set the AMPLITUDE switch to -f and turn off the power. 
Using an ohmmeter, check the resistance from the top end 
of R244 to chassis ground. If there is no charge on the 
filter capacitors, the resistance reading should be about 
800 ft to 2 k. If it is not, reverse the meter leads and re- 
check. 






4-1 




Maintenance and Calibration — Type 114 



3. If the voltage and resistance measurements taken in 
the preceeding steps are normal, use an oscilloscope to 
check the waveforms at the points shown on the schematics 
in Section 5. Checking the waveforms will help in isolat- 
ing the trouble to a particular circuit. Once the trouble is 
isolated to a particular circuit, take voltage and resistance 
measurements until the defective component is identified. 

Component Identification. The circuit number of each 
electrical part is shown on the circuit diagrams in Section 5. 
Note that a functional group of circuits (such as the power 
supply) is assigned a particular series of numbers. Switch 
wafers are identified by counting from the first wafer locat- 
ed behind the detent section of the switch towards the last 
wafer. The letters F and R indicate whether the front or 
rear of the wafer is used to perform the particular switch- 
ing function. For example, the designation 2R printed by a 
switch section on a schematic identifies the switch section 
as being on the rear side of the second wafer when counting 
back from the detent section. 

Parts Replacement. Most of the electronic components 
in the Type 114 are standard items available locally. The 
remainder of the electronic components and most of the 
mechanical parts are manufactured or selected by Tek- 
tronix to satisfy particular requirements, or are manufac- 
tured for Tektronix to our specifications. However, all parts 
are obtainable through your Tektronix Field Engineer or 
Field Office. Before purchasing or ordering, consult the 
Parts List (Section 5) to determine the value, tolerance, and 
ratings required. See "Parts Ordering Information" and 
"Special Notes and Symbols" on the first page of Sec- 
tion 5. 

When selecting the replacement parts, it is important 
to remember that the physical size and shape of a com- 
ponent may affect its performance in the circuit. Parts 
orientation and lead dress should duplicate those of the 
original part, since many of the components are mounted 
in a particular way to reduce or control stray capacitance 
and inductance. After repair, portions of the instrument may 
require recalibration. 

Replacing Components on Etched-Circuit Boards. Use 

ordinary electronic grade 60/40 solder and a 35- to 40- 
watt pencil soldering iron with a Vs" wide chisel tip. The 
tip of the iron should be clean and properly tinned for best 
heat transfer in a short time to a soldered connection. A 
higher wattage soldering iron, if used and applied for too 
long a time, ruins the bond between the etched wiring and 
base material by charring the glass epoxy laminate. 

The step-by-step technique is as follows: 

1. Remove the component by cutting the leads near the 
body. This frees the leads for individual unsoldering. 

2. Grip the lead with needle-nose pliers. Apply the tinned 
tip of a 40-watt pencil soldering iron to the lead between 
the pliers and the board; then pull gently. 

3. When the solder first begins to melt, the lead will 
come out, leaving a clean hole. If the hole is not clean, 
use the soldering iron and a toothpick or a piece of enamel 
wire to open the terminal hole. Do not attempt to drill the 
solder out since the "through-hole" plating might be de- 
stroyed. 



4. Clean the leads on the new component and bend 
them to the correct shape. Carefully insert the leads into 
the holes from which the defective component was removed. 

5. Apply the iron for a short time at each connection on 
the side of the board opposite the component to properly 
seat the component. 

6. Apply the iron and a little solder to the connections 
to finish the solder joint. 



Calibration and Verification 

Recalibrate the Type 114 after each 500 hours of opera- 
tion, or every six months if used intermittently. It may also 
be necessary to recalibrate certain sections of the instru- 
ment when transistors or other components are replaced. 
Before recalibrating the instrument, clean it as previously 
described. 

Do not preset the internal adjustments as a preliminary 
to recalibration. Presetting internal adjustments makes it 
necessary to completely recalibrate the instrument. 

The following portion of this manual presents a step-by- 
step calibration and verification procedure. The title of each 
numbered step begins either with "Adjust" ^ or 
"Check", thereby identifying the step function as calibra- 
tion or verification. The steps are identified in this manner 
because any or all groups of numbered "Checks" can be 
skipped without disrupting the continuity of the procedure. 
However, all adjustments must be completed in the order 
given and none should be skipped. Remember that proper 
overall operation is ensured only when all steps in the pro- 
cedure have been completed and all adjustments have 
been made as accurately as possible. 

NOTE 

The performance standards described in this sec- 
tion of the manual are provided strictly as guides 
to calibration of the Type 114 and should not be 
construed as advertised performance specifica- 
tions. However, if the Type 114 performs within 
the guide tolerances given in the calibration pro- 
cedure, it will also perform as listed in the Char- 
acteristics section of this manual. 



Equipment Required. (See Fig. 4-1.) 

1. Oscilloscope, Tektronix Type 547/1 A1 or equivalent. 

2. Time mark generator, Tektronix Type 180A or equiv- 
alent. 

3. Volt-Ohm-Milliammeter, 20,000 per volt, Simpson 
Model 260 or equivalent. 

4. Three 50 H coax cables with BNC connectors (Tek- 
tronix Part No. 012-057). 

5. 50 Q BNC termination (Tektronix Part No. 011-049). 

6. Variable line voltage source such as a variable auto- 
transformer. 




Maintenance and Calibration — Type 114 




Fig 4*2. Initial control totting* for colibrotion. 



Preliminary Procedure (no power applied) 

1. Check the Type 114 front-panel controls for smooth 
mechanical operation, proper indexing, and knob spacing. 
Correct all defects found. 

2. Remove the Type 114 from its cabinet and check for 
loose hardware. 

3. Check to see that the proper fuse is installed (0.3a 
slo-blo for 115-volt operation, 015a slo-blo for 230 volt 
operation) 

4. Set the Type 114 front-panel controls as shown in 
Fig. 4 2 

a. PERIOD 1 ,iS 

VARIABLE CAL 

b. WIDTH lOOnS 

VARIABLE CAL 

c. AMPLITUDE 3 to 10 V, + polarity 

VARIABLE fully clockwise 

d. POWER off 

e. TRIGGER LEADING EDGE 

5. Using the VOM, check the resistances between chassis 
ground and the points indicated in Table 4-1 (see Fig. 4-3). 



TABLE 4-1 



Circuit 


Check Points 


Approximate 

Resistance 


T281 Primary 


Terminals 1 thru 4 


infinity 


■4- 25-volt supply 


Outer shell of C298 


1.5 K 


-+- 35-volt supply 


C298 + terminal 


2 K 



Checks and Adjustments 

NOTE 

Control settings and test conditions for each step 

are the same as for the preceding step unless 

otherwise noted. 

1. Adjust + 25-volt supply 0 

a. Set all controls os shown in Fig 4-2 

b. Install the 50 it termination (Tektronix Part No 011-049) 
on the Type 1A1 Channel 1 input. Connect a 500 coax 
cable between the Type 114 OUTPUT connector and the 
termination 

c. Connect the Type 114 power cord to a variable line 
voltage source and set the input voltage to the Type 114 at 
115 volts. 

d. Turn on the equipment and allow a 5 minute warm up 
before proceeding 

e. Slowly rotate the WIDTH VARIABLE control clock- 
wise until the WIDTH > PERIOD light is lit. Rotate the 
WIDTH — VARIABLE control counterclockwise to the point 
where the WIDTH > PERIOD light just extinguishes. 

f. Connect the VOM negative lead to chassis ground. 
Connect the positive lead to the outside shell of C298 (see 
Fig. 4-4). 

g. Adjust R290 (-t-25 VOLTS) until the meter reads +25 
volts ^-0.5 volt. 




Maintenance and Calibration — Type 114 



1 fi sec poriod 

adjust C115F ««'OD CAL 



T28 1 
Primary 
connection* 




+ J5-VOIT SUPPLY 



\ 

+3S-VOLT SUPPLY 



+ 25 VOLTS 
AOJUST 
8290 



100 ns*c width 
odjust C19SF 



Fig 4-3. Typo 114 chassis, bottom viow 



2. Check + 35-volt unregulated supply 

a. Change the VOM positive lead to the positive terminal 
of C298 

b. Check that the meter reads + 33 volts t 2 volts. 




Fig. 4-4. + 25 volt supply odjustmont. 



3. Check voltage across D209 

o. Change the VOM positive lead to the (unction of D208, 
R209 and D209 



b. Check that the meter reads +3 volts . f ’/j volt from 
the junction to chassis ground. 

4. Check + 25-volt supply regulation 

a. Change the VOM positive lead to the outside shell of 
C298. Chock that the meter reads +25 volts t 0.5 v. 

b. Using the variable line voltage source, vary the line 
voltage from 94.5 to 137.5 volts. 

c. Check that the VOM reading does not change more 
than 0.5 v while the line voltage is varied over the range 
specified. 

d. Return the variable line voltage source to 115 volts. 

5. Check + 25-volt supply for ripple 

a. Remove the VOM leads. Remove the 50 12 termination 
from the Type IAI input but leave it connected to the coax 
cable. 

b. Connect a IX probe to the Type IAI Channel 1 input. 

c. Set the test oscilloscope for line triggering. Using the 
IX probe, check that the ripple on the outside shell of C298 
does not exceed 10 millivolts. Check only for 60* or 120- 
cycle ripple; disregard the various transients noted. 

d. Set the variable line voltage for 94.5 volts and agoin 
check thot the ripple does not exceed 10 millivolts. 

e. Return the variable line voltage source to 115 volts 
and remove the IX probe from C298 and from the Type 1A1 
Channel 1 input. 






4-5 






Maintenance and Calibration — Type 114 




Fig. 4*3. Control settings for PERIOD CAL adjustment 



6. Adjust PERIOD CAL control R125 £ 

o. Set the Type 114 WIDTH — VARIABLE control to CAL 
Turn the WIDTH control to 1 /#S and the PERIOD control to 
100 /tS (see Fig 4 5). 

b. Reconnect the Type 114 OUTPUT to the Type 1A1 
Channel 1 input through the 5011 coox and the 5012 
termination. 

c. Connect a 5012 coax cable from the Type 180A MARK 
ER OUT connector to the Typo 1A1 Chonnel 2 input. Set the 
Type 180A for 100 microsecond markers. 

d. Set the Type 1AI Channel 2 VOLTS/CM switch to 2 
Turn tho MODE switch to CH 2. Pull out the Channel 2 PULL 
TO INVERT switch 

c. Set the Type 547 HORIZONTAL DISPLAY switch to B. 
Set the TIME/CM (B) switch to 1 mSEC. Set the TRIGGER. 
ING-SOURCE switch to INTNORM, the SLOPE switch to 
and the MODE switch to TRIG. Adjust the TRIGGERING 
LEVEL control for a stable display of the 100 microsecond 
markers from the Type 180A. 

f. Change the Type IA1 MODE switch to ALT and the 
Channel 1 VOLTS/CM switch to 5. Using the Type 1AI 
POSITION controls, position the display so that the peaks of 
the pulses from the Type 114 arc vertically displaced about 
1 mm below the peaks of the inverted pulses from the Type 
180A on the other trace. 

g. Adjust the PERIOD CAL control R125 (sec Fig. 4-6) so 
that the corresponding pulses in the two traces are aligned 
horizontally to within Vj% Iscc Fig. 4-7). 




Fig 4*6 location of PERIOD CAL control R12S 



































































!V * 1 








- - - - - 




*• - 
















J 







Fig 4>7. Crt display showing correct adjustment of PERIOD CAL 
control. 






4-6 







Fig. 4-1. Control totting* for adjusting tho 1 microsecond period copocitor. 



7. Adjust 1 microsecond period capacitor A 
C115F W 

a. Set tho Typo 114 PERIOD control to 1 ja$, the WIDTH 
control to lOOnS, and both PERIOD and WIDTH VARI- 
ABLE controls to CAL (see Fig. 4 8). 




8. Check period accuracy, 10 mS to 1 it S 

a. Set the Type 1 1 4 PERIOD control to 10 mS and tho 
WIDTH control to 10 M S. 



Fig. 4.9 Crt display showing correct adjustment of fast period 
capacitor C11SF 

b. Set the Type S47 TIME/CM |B) switch to 1 /< SEC. Push 
in the PULL TO INVERT switch on Channel 2 of the Type 
1 Al. 



Fig. 4-10 Location of 1 microsecond period capacitor C115F. 



c. Set the Type 180A »o deliver 1 microsecond markers 

d. Using the Type 1A1 POSITION controls, put the peak 
of the first pulse from the Type 114 to some reference point 
on the first pulse from the Type 180 A (see Fig. 4-9). 

e Adjust capacitor C115F (see Fig. 4-10) so that the peaks 
of the pulses from the Type 114 occur al the some point on 
each succeeding pulse from the Type 180A as shown in Fig. 
4 9. Allowable error is 3%, but it is possible to adjust 
much closer than this. 



b. Turn the Type 1A1 MODE switch to ALT and pull out 
the Channel 2 PULL TO INVERT switch 

c. Set the Type 180A to deliver 10 millisecond markers. 

d. Set the Type 547 TIME/CM IB) switch to 10mSEC and 
adjust the TRIGGERING LEVEL control for a stable display. 

e. Check for horizontal alignment between the two sets 
of markers (see Fig. 4-7). Horizontal alignment should be 
within 3%. 






4-7 






Maintenance and Calibration — Type 114 



f. Using Table 4-2, check the period accuracy of the re- 
maining settings of the PERIOD switch. In all cases the ac- 
curacy should be as specified. 



9. Check PERIOD — VARIABLE control for a 
range of 10:1 or more 

a. Set the Type 114 PERIOD control to 10 mS and the 
WIDTH control to 100/iS. 

b. Turn the Type 1A1 MODE switch to CH 1. 

c. Set the Type 547 TIME/CM |B] to .1 SEC. 

d Rotate the PERIOD VARIABLE control clockwise. Check 
that a display of 1 marker/cm is obtainable (10:1). 



10. Adjust WIDTH CAL control R180 £ 

a. Set the Type 114 PERIOD and WIDTH controls to 1 mS 
and turn both VARIABLE controls to CAL (see Fig. 4-11). 

b. Set the Type 180A for 100 microsecond markers. 

c. Turn the Type 1A1 MODE switch to ALT. 

d. Set the Type 547 TIME/CM (B) to .2 mSEC and adjust 
the TRIGGERING LEVEL control for a stable display. 

e. Use the Type 1A1 POSITION controls to obtain the dis- 
play shown in Fig. 4-12. 

f. Adjust the WIDTH CAL control R180 (see Fig 4-13) for 
a positive pulse width of 1 millisecond (ten 100 microsecond 
periods) using the time markers from the Type 180A as 
reference. 

g. Check to see that WIDTH > PERIOD light is on. 




Fig. 4-11. Control totting. For adjvtting WIDTH CA1 control R180 



TABLE 4-2 



Type 1 1 4 
PERIOD 


Type 1 1 4 
WIDTH 

10,.S 


Type 547 
TIME/CM (B) 


Type 1 80A 
Markers 


Error 


10 mS 


lOmSEC 


10 milliseconds 


' 3% 


1 mS 


10, .s 


1 mSEC 


1 millisecond 


*3% 


100 /.S 


1 


.1 mSEC 


100 microseconds 


Adjusted to < Vj% 


10, .s 


lOOnS 


10,i SEC 


10 microseconds 


jfc 3 % 


lyiS 


lOOnS 


1 ifSEC 


1 microsecond 


Adjusted to < 3% 






4-8 




Maintenance and Calibration — Type 114 




Fig 4-12. Crf dUploy showing correct adjustment of WIDTH CAL 
control R180 



1 1. Adjust 100 nS Pulse Width capacitor 
C195F 




o. Set the Type 114 WIDTH switch to lOOnS, set the PE- 
RIOD switch to 1 /iS (see Fig 4*14). 

b. Set the Type 547 TIME/CM (B) to .1 //SEC. 

c. Set the Type 1A1 Channel 1 VOLTS/CM switch to 2. 
Rotate the Type 114 AMPLITUDE — VARIABLE ond the Type 
1A1 Channel 1 POSITION controls for 5 cm of pulse ompli- 
tude. Center the pulse vertically on the graticule. Set the 
Type 547 TRIGGERING LEVEL control for stable triggering. 

d. Set the Type I80A to deliver 10 me sine-wave output. 

e. Use the Type 1A1 Channel 2 POSITION control to posi- 
tion the top of the sine waves from the Type 180A to the 
graticule centerline. 




Fig 4-1 9. Location of WIDTH CAL control R1I0 



f Set the SWEEP MAGNIFIER control to X5 Use the HORI- 
ZONTAl POSITION and TRIGGERING LEVEL controls to 
obtain the display shown in Fig. 4-15. 

NOTE 

At 100 nanosecond pulse widths, the risetime and 
falltime of the pulse becomes a significant portion 
of the pulse width, therefore the pulse width meas- 
urement is made at the 50% amplitude points, 




Fig. 4*14. Control totting* for adjwtting lOOnS Puli* Width capacitor C195F 






4-9 






Maintenance and Calibration — Type 1)4 



g. Ad|ust C195F (see Fig. 4-16) for 100 nanoseconds pulse 
width. Allowable error is "*“3%, however, it is possible to 
adjust more closely than this. 




Fig. 4-15. CM display for propor sotting of lOOnS Pulse Width 
copocitor C195F. 



14. Check operation in square-wave mode 

a. Set the Type 114 WIDTH control to SQUARE WAVE. 

b. Using Table 4 4 check square-wave operation for all 
positions of the PERIOD control. Allowable period error is 
4 mm within the center 8 cm of the trace 



TABLE 4-4 



Type 1 1 4 
PERIOD 


Type 547 
TIME/CM (B) 


Cycles/8 cm 


10 mS 




lOmSEC 


8 


1 mS 




1 mSEC 


8 


100/cS 




.1 mSEC 


8 


10 ,iS 




10 /iSEC 


8 


1 fiS 




1 mSEC 


8 



12. Check pulse width accuracy 

Using the settings given in Table 4-3, chock tho pulse width 
accuiacy in the other settings of the WIDTH control. 



TABLE 4-3 



Type 114 
PERIOD 


Type 114 
WIDTH 


Type 547 
TIME/CM 


Type 
1 80A 
Time 
Markers 


Number 

of 

Markers 


1 mS 


1 m$ 


2 mSEC 


1 00 ^.sec 


10 


1 mS 


100 /cS 


20 ,i SEC 


10 / sec 


10 


100 fiS 


10 mS 


2 /.SEC 


1 fiUtC 


10 


10 /iS 


1 M s 


.2 /.SEC 


10 me 


10 cycles 



13. Check WIDTH — VARIABLE control range 

a. Set the Type 114 WIDTH control to 100 /iS, set the PE- 
RIOD control to lOmS and the PERIOD VARIABLE control 
to CAL. 

b. Set the Type 180A for 100 microsecond markers. 

c. Set the Type 1A1 Channel 1 VOLTS/CM switch to 5. 

d. Set the Type 547 TIME/CM (B) to .2 mSEC, the TRIG- 
GERING SLOPE switch to +, and adjust the TRIGGERING 
LEVEL control for a stable display. 

e. Slowly rotate the WIDTH — VARIABLE control clock- 
wise. Check for a pulse width of at least 1 millisecond (ten 
100 microsecond markers) at the clockwise end of rotation 
(see Fig. 4-12). 

f. Return the WIDTH VARIABLE control to the CAL 
position. 



15. Check output amplitude (into the 5012 ter- 
mination) 

a. Turn the Type 114 AMPLITUDE VARIABLE control 
slowly counterclockwise, checking for smooth mechanical and 
electrical operation 

b. Set the Type 1A1 Channel 1 VOLTS/CM switch to 1 
and check for 3 cm or less of vertical deflection when the 
AMPLITUDE VARIABLE control is fully counterclockwise. 




Fig. 4-16. location of lOOnS Puls* Width copocitor C195F. 



c. Set the Type 1A1 Channel 1 VOLTS/CM switch to 2. 
Rotate the Type 114 AMPLITUDE — VARIABLE control fully 
clockwise. Check for 5 cm or more of vertical deflection. 

d. Change the AMPLITUDE switch to —3 to 10 V and re- 
peat the amplitude check. Check both the -f- and 1 V to 
3 V positions of the AMPLITUDE switch. 





Maintenance and Calibration — Type 1 1 4 



PI fl 4-17 !•%» %• tup for (Hocking oitornol triggering 



16. Check external triggering and trigger out- 
put operation 

a. Set the Type 114 PERIOD control to 1 n$, jet the WIDTH 
control to 100 nS and set the VARIABLE controls to CAL. 

b. Connect a 501) coax from the Type 180A MARKER 
OUT connector to the Type 114 EXTERNAL TRIGGER IN- 
PUT connector. Set the Type 180A for 1 microsecond markers. 

c. Connect a 50 0 coax from the Type 114 TRIGGER OUT- 
PUT connector to the Type 1A1 Channel 1 input (see Fig. 
4-17). Set the Type 1A1 MODE switch to CH 1. Set the 
Type 1A1 Channel 1 VOLTS/CM switch to 1. 

d. Set the Type 547 TIME/CM (B) switch to 1 /iSEC and 
adjust the TRIGGER LEVEL control for a stable display. Check 
for 1 pulse/cm of 3 volts amplitude :fc 1 volt. 

e. Insert the 50 12 termination between the coax and the 
Type 1A1 Channel 1 input connector. Change the Channel 
1 VOLTS/CM switch to .2. The amplitude of the trigger pulse 
from the Type 114 should now be between 0.4 and 0.7 volt 
as measured on the crt. 

f. Switch the Type 114 TRIGGER switch back and forth 
between LEADING EDGE and TRAILING EDGE. The display 
on the crt should flicker slightly and show minor differences 
between the leading edge and trailing edge trigger pulses. 

g. Turn the Type 114 PERIOD control to EXTERNAL TRIG- 



GER and note that the display remains the same. Return the 
PERIOD control to 1 /xS. 

17. Check pulse risetime, falltime, and aber- 
rations 

a. Set the Type 547 TIME/CM (B) switch to .2^SEC. Set 
the Type 1A1 VOLTS/CM switch to 2. 

b Remove the 50 1) coax from the Type 114 TRIGGER 
OUTPUT connector and connect it to the OUTPUT connector. 
Check to see that the 50 1) termination is between the 50 1) 
coax and the Type 1A1 Channel 1 input connector. Set the 
Type 114 AMPLITUDE control for maximum positive output. 

c. Obtain stable triggering and odjust the AMPLITUDE — 
VARIABLE control for 5 cm of vertical deflection. 

d. Rotate the Type 114 WIDTH — VARIABLE control for 
2 complete cycles in the 10 cm of the graticule (see Fig. 
4-18) 

e. Check that the aberrations, such os those shown in Fifl 
4-18 do not exceed 5% peak -to- peak (2'/j mm or 1 } / 4 minor 
graticule division). 

f. Change the AMPLITUDE switch to —3 to 10 V and re- 
peat the aberration check. 

g. Change the AMPLITUDE switch back to +3 to 10 V. 
Change the Type 547 TIME /CM (B) switch to .1 /iSEC and 
obtain a stable display. 





Maintenance and Calibration — Type 114 




Fig. 4-18. Crt ditplay of pwl»o ob,r»o»ion% 



h. Using the HORIZONTAL POSITION and VERNIER con- 
trols, position the leading edge of the pulse to the center of 
the graticule. 

i. Turn the SWEEP MAGNIFIER to XI 0. This gives an 
equivalent time/cm of 10 nanoseconds. 

j. Mcasuro the risetime between the 10% and 90% points 
on the waveform (see Fig. 4 19). 

k. Using the HORIZONTAL POSITION and VERNIER con- 
trols, position the trailing edge of the pulse to tho center of 
the graticule and measure the falltime 




Fig. 4-19. Crt dUploy for riftolimo moaturomonf 



I. Set the AMPLITUDE switch to —3 to 10 V and repeat 
h, i, j, and k. 

NOTE 

The risetime or falltime of the Type 114 as read 
on the crt of the Type 547 will be less than 13 
nanoseconds. The 50 megacycle bandpass of the 
Type 547/ 1A1 adds about 25 V, to the actual rise 
and fall times of the Type 114. For this reason, 
risetime and folltime should be checked with a 
sampling oscilloscope system if one is available. 






Maintenance and Calibration — Type 114 



CALIBRATION RECORD 



Serial. 

Date 

1. Voltage on outside shell of C298 (+25-volt supply) 

2. Voltage on positive terminal of C298 [+35-volt supply) 

3. Voltage across D209 

4. Regulation of +25-volt supply %. 

5. Ripple on outside shell of C298 millivolts. 

6. Period accuracy, all settings of PERIOD control, 

1 n S % 

10 % 

100 fxS % 

1 mS % 

lOmS % 

7. PERIOD — VARIABLE control range :1. 

8. Width accuracy, all settings of WIDTH control, 

lOOnS . . ..% 

1 i-lS % 

10^S % 

100 % 

1 mS % 

9. WIDTH — VARIABLE control range :1. 

10. Square wave period accuracy — %• 

11. Output amplitude into a 50 Q load, all settings of AMPLITUDE switch, 

+3 to 10V 

+ 1 to 3 V, 

—1 to 3 V 

-3 to 10 V 

12. External trigger operation, meets specification — (yes) Jno) . 

13. Trigger output amplitude, 50 Q load , no load, . 

14. Pulse risetime, nanoseconds. 

15. Pulse falltime, nanoseconds. 



® 



4-13 




Maintenance and Calibration — Type 114 




Fig. 4-20. location* of •loctrical component* 



4-14 



















SECTION 5 

PARTS LIST AND DIAGRAMS 



PARTS ORDERING INFORMATION 

Replacement parts are available from or through your local Tektronix Field Office. 

Changes to Tektronix instruments are sometimes made to accommodate improved 
components as they become available, and to give you the benefit of the latest circuit 
improvements developed in our engineering department. It is therefore important, when 
ordering parts, to include the following information in your order: Part number including 
any suffix, instrument type, serial number, and modification number if applicable. 

If a part you have ordered has been replaced with a new or improved part, your 
local Tektronix Field Office will contact you concerning any change in part number. 



ABBREVIATIONS AND SYMBOLS 





a or amp 


amperes 


mm 


millimeter 


, 


BHS 


binding head steel 


meg or M 


megohms or mega (10 6 ) 




C 


carbon 


met. 


metal 




cer 


ceramic 




micro, or 10~ 6 




cm 


centimeter 


n 


nano, or 10~ 9 




comp 


composition 


a 


ohm 




cps 


cycles per second 


OD 


outside diameter 




crt 


cathode-ray tube 


OHS 


oval head steel 




CSK 


counter sunk 


P 


pico, or 10" 12 





dia 


diameter 


PHS 


pan head steel 




div 


division 


piv 


peak inverse voltage 




EMC 


electrolytic, metal cased 


piste 


plastic 




EMT 


electroyltic, metal tubular 


PMC 


paper, metal cased 


, — 


ext 


external 


poly 


polystyrene 




f 


farad 


Prec 


precision 




F & 1 


focus and intensity 


PT 


paper tubular 




FHS 


flat head steel 


PTM 


paper or plastic, tubular, molded 


, - 


Fil HS 


fillister head steel 


RHS 


round head steel 




g or G 


giga, or TO 9 


rms 


root mean square 




Ge 


germanium 


sec 


second 




GMV 


guaranteed minimum value 


Si 


silicon 


, 


h 


henry 


S/N 


serial number 




hex 


hexagonal 


t or T 


tera, or 10 12 




HHS 


hex head steel 


TD 


toroid 




HSS 


hex socket steel 


THS 


truss head steel 


L 


HV 


high voltage 


tub. 


tubular 




ID 


inside diameter 


v or V 


volt 




incd 


incandescent 


Var 


variable 




int 


internal 


w 


watt 





k or K 


kilohms or kilo (1 0 3 ) 


w / 


with 




kc 


kilocycle 


w/o 


without 




m 


mil li, or 10“ 3 


WW 


wire-wound 




me 


megacycle 







xooo 

ooox 

* 000-000 

Use 000-000 

o 



SPECIAL NOTES AND SYMBOLS 

Part first added at this serial number. 

Part removed after this serial number. 

Asterisk preceding Tektronix Part Number indicates manufactured by or for Tektronix, 
or reworked or checked components. 

Part number indicated is direct replacement. 

Internal screwdriver adjustment. 

Front-panel adjustment or connector. 



® 



5-1 




Parts List — Type 114 



EXPLODED VIEW 






Parts List — Type 114 



EXPLODED VIEW 



REF. 

NO. 


PART NO. 


SERIAL/MODEL NO. 


» 


DESCRIPTION 


EFF. 


DISC. 


1 


366-0038-00 






1 


KNOB, small red— CAL VARIABLE 










- 


knob includes: 




213-0004-00 






1 


SCREW, set, 6-32 x 3 / u inch HSS 


2 


366-0160-00 






1 


KNOB, charcoal — PERIOD 










- 


knob includes: 




213-0004-00 






1 


SCREW, set, 6-32 x 3 /u inch HSS 


3 


214-0553-00 






1 


LATCH, screw 


4 


366-0038-00 






1 


KNOB, small red — CAL VARIABLE 










- 


knob includes: 




213-0004-00 






1 


SCREW, set, 6-32 x 3 / u inch HSS 


5 


366-0160-00 






1 


KNOB, charcoal— WIDTH 










- 


knob includes: 




213-0004-00 






1 


SCREW, set, 6-32 x 3 / u inch HSS 


6 


366-0038-00 






1 


KNOB, small red — VARIABLE 










- 


knob includes: 




213-0004-00 






1 


SCREW, set, 6-32 x 3 /,< inch HSS 


7 


366-0160-00 






1 


KNOB, charcoal— AMPLITUDE 










- 


knob includes: 




213-0004-00 






1 


SCREW, set, 6-32 x 3 / u inch HSS 


8 


131-0352-00 






3 


CONNECTOR, BNC, female (w/mounting hardware) 


9 


358-0255-00 






1 


BUSHING, latch 


10 


333-0887-00 






1 


PANEL, front 


11 


260-0613-00 






1 


SWITCH — POWER (w/mounting hardware) 


12 


136-0164-00 






2 


SOCKET, lamp (w/mounting hardware) 


13 


386-0122-00 


100 


939 


1 


PLATE, sub-panel 




386-0122-01 


940 




1 


PLATE, sub-panel 


14 


262-0696-00 






1 


SWITCH, wired— PERIOD 










- 


switch includes: 




260-0671-00 






1 


SWITCH, unwired— PERIOD 


15 


384-0299-00 






1 


ROD, switch 


16 


376-0014-00 






n 


COUPLING, pot 


17 








n 


RESISTOR, variable 










■ 


mounting hardware: (not included w/resistor) 




210-0012-00 






B 


LOCKW ASHER, internal ;3 / 8 x V 2 inch 




210-0413-00 






m 


NUT, hex., 3 / 8 -32 x V 2 inch 


18 








- 


mounting hardware: (not included w/switch) 




210-0840-00 






l 


WASHER, .390 ID x V, s inch OD 




210-0012-00 






i 


LOCKW ASHER, internal, 3 / 8 x y 2 inch 




210-0413-00 






l 


NUT, hex, 3 / 8 -32 x y 2 inch 


19 


262-0697-00 






1 


SWITCH, wired— WIDTH 










- 


switch includes: 




260-0671-00 






l 


SWITCH, unwired — WIDTH 


20 


384-0299-00 






l 


ROD, switch 


21 


376-0014-00 






l 


COUPLING, pot 


22 










RESISTOR, variable 










1H 


mounting hardware: (not included w/resistor) 




210-0012-00 








LOCKWASHER, internal, % x '/ 2 inch 




210-0413-00 








NUT, hex, 3 / 8 -32 x ’/ 2 inch 


23 










mounting hardware: (not included w/switch) 




210-0840-00 








WASHER, .390 ID x »/ 16 inch OD 




210-0012-00 






■ 


LOCKWASHER, internal, 3 /s x n /2 inch 




210-0413-00 






i 


NUT, hex., %-32 x '/ 2 inch 



© 



5-3 





















Parts List — Type 114 



EXPLODED VIEW (Cont'd) 



REF. 

NO. 


PART NO. 


SERIAL/MODEL NO. 


g 


DESCRIPTION 


EFF. 


DISC. 


24 


262-0698-00 






1 


SWITCH, wired— AMPLITUDE 










. 


switch includes: 




260-0672-00 






1 


SWITCH, unwired— AMPLITUDE 


25 


384-0299-00 






1 


ROD, switch 


26 


376-0014-00 






1 


COUPLING, pot 


27 








1 


RESISTOR, variable 










. 


mounting hardware: (not included w/resistor) 




210-0012-00 






1 


LOCKW ASHER, internal, 3 / 8 x y 2 inch 




210-0413-00 






2 


NUT, hex, %-32 x '/ 2 inch 


28 


407-0122-00 






1 


BRACKET 










- 


mounting hardware: (not included w/bracket alone) 




210-0458-00 






1 


NUT, keps, 8-32x n /32 inch 


29 








- 


mounting hardware: (not included w/switch) 




210-0840-00 






1 


WASHER, .390 ID x ’/ u inch OD 




210-0012-00 






1 


LOCKWASHER, internal, % x ] / 2 inch 




210-0413-00 






1 


NUT, hex, %-32 x '/ 2 inch 


30 


441-0604-00 






1 


CHASSIS 










- 


mounting hardware: (not included w/chassis) 




211-0542-00 






3 


SCREW, 6-32 x 5 / n< inch, THS phillips 




211-0538-00 






3 


SCREW, 6-32 x 5 /,< inch, FHS phillips 


31 








1 


TRANSFORMER 










. 


transformer includes: 




21 1 -0530-00 






4 


SCREW, 6-32 x 1 3 / 4 inches, PHS 




210-0823-00 






4 


WASHER, fiber, Vs ID x '/ 4 inch OD 










- 


mounting hardware: (not included w/transformer) 


32 


210-0457-00 






4 


NUT, keps, 6-32 x 5 /i 6 inch 


33 


200-0293-00 






2 


COVER, capacitor, polyethylene 


34 


351-0089-00 


100 


939 


1 


GUIDE, corner rail 




351-0089-02 


940 




1 


GUIDE, corner rail 










- 


mounting hardware: (not included w/quide) 




211-0538-00 






2 


SCREW, 6-32 x s /, 6 inch, FHS phillips 


35 


260-0675-00 






1 


SWITCH, slide 










- 


mounting hardware: (not included w/switch) 




21 1 -0008-00 






2 


SCREW, 4-40 x '/, inch, BHS 




210-0406-00 






2 


NUT, hex, 4-40 x 3 /i6 inch 


36 


386-0254-00 






2 


PLATE, fiber, large 










- 


mounting hardware for each: (not included w/piate) 




211-0543-00 






2 


SCREW, 6-32 x 5 / 18 inch, RHS 




210-0006-00 






2 


LOCKWASHER, internal, #6 




210-0407-00 






2 


NUT, hex, 6-32 x y 4 inch 



5-4 










EXPLODED VIEW (Co nt'd) 



Parts List — Type 1 1 4 



REF. 

NO. 


PART NO. 


SERIAL/MODEL NO. 


H 


DESCRIPTION 


EFF. 


DISC. 


37 








1 


TRANSISTOR 










- 


mounting hardware: (not included w/transistor) 




386-0143-00 






1 


PLATE, mica 




210-0202-00 






1 


LUG, solder, SE #6 




210-0983-00 


100 


1139 


2 


WASHER, shouldered, black anodized 




210-0811-00 


1140 




2 


WASHER, fiber, #6 




210-0802-00 






2 


WASHER, 6Sx 5 / u inch 




210-0006-00 






1 


LOCKWASHER, internal, #6 




210-0407-00 






2 


NUT, hex, 6-32 x ’4 inch 




211-0507-00 






2 


SCREW, 6-32 x 5 / u Inch, BHS 


38 


214-0561-00 


100 


939 


1 


PIN, locating, w/8-32 threads 




214-0680-00 


940 




1 


PIN, locating, w/8-32 threads 


39 


352-0002-00 






1 


ASSEMBLY, fuse holder 










- 


assembly includes: 




200-0582-00 






1 


CAP, fuse 




352-0010-00 






1 


HOLDER, fuse 




210-0873-00 






1 


WASHER, rubber 










1 


NUT 


40 


131-0150-00 






1 


CONNECTOR, motor base 










- 


connector includes: 




129-0041-00 






1 


POST, ground 




200-0185-00 






1 


COVER 




205-0014-00 






1 


SHELL 




210-0004-00 






2 


LOCKWASHER, internal, #4 




210-0551-00 






2 


NUT, hex, 4-40 xV 4 inch 




211-0015-00 






1 


SCREW, 4-40 xy 2 inch, RHS 




214-0078-00 






2 


PIN, connecting 




377-0041 -00 






1 


INSERT 










- 


mounting hardware: (not included w/connecfor) 




213-0104-00 






2 


SCREW, thread forming, #6x 3 / 8 inch, THS phillips 


41 


214-0561-00 


100 


939 


1 


PIN, locating, w/8-32 threads 




214-0680-00 


940 




1 


PIN, locating, w/8-32 threads 










- 


mounting hardware: (not included w/pin) 




210-0008-00 






1 


LOCKWASHER, internal, #8 




210-0409-00 






1 


NUT, hex, 8-32x 5 /i6 inch 


42 


386-0121-00 


100 


939 


1 


PLATE, rear 




386-0121-01 


940 




1 


PLATE, rear 










- 


mounting hardware: (not included w/plate) 




212-0044-00 







4 


SCREW, 8-32 x V 2 inch, RHS phillips 






5-5 











Parts List — Type 114 



REF. 

NO. 



PART NO. 



SERIAL/MODEL NO. 



EFF. 



DISC. 



43 

44 



45 



46 



47 

48 



49 



50 



51 

52 

53 



385-0181-00 



211-0553-00 

211-0601-00 

210- 0478-00 

211- 0507-00 

210 - 0201-00 

211-0008-00 

211-0116-00 

210-0406-00 

670-0203-00 

388-0621-00 

388-0621-01 

214-0653-00 

386-1101-00 

210- 0457-00 
136-0183-00 

211- 0008-00 
211-0116-00 
210-0004-00 
210-0406-00 

260-0613-00 

210-0940-00 

179-0964-00 



100 

440 



100 

1110 

X500 

X500 



439 



1109 



100 

440 



439 



EXPLODED VIEW fcontj 





» 


DESCRIPTION 




3 


ROD, spacer 




1 


RESISTOR 




- 


mounting hardware: (not included w/resistor) 




n 


SCREW, 6-32 xiy 2 inches, RHS phillips 




H 


EYELET 




n 


NUT, resistor mounting 




H 


SCREW, 6-32 x 5 / 16 inch, BHS 




1 


LUG, solder, SE #4 




- 


mounting hardware: (not included w/lug) 




1 


SCREW, 4-40 x V 4 inch, BHS 




1 


SCREW, sems, 4-40 x s /u inch, PHB, phillips 




1 


NUT, hex, 4-40 x 3 /t 6 inch 




1 


ASSEMBLY, wired circuit board 




- 


assembly includes: 




1 


BOARD, circuit 




1 


BOARD, circuit 




2 


SINK, heat 




1 


PLATE, heat sink 




- 


mounting hardware: (not included w/plate) 




2 


NUT, keps, 6-32 x S / H inch 




18 


SOCKET, transistor 




- 


mounting hardware: (not included w/board) 




7 


SCREW, 4-40 x V, inch, BHS 




7 


SCREW, sems, 4-40 x 5 / ]6 inch, PHB, phillips 




7 


LOCKWASHER, internal, #4 




7 


NUT, hex, 4-40 x 3 /u inch 




1 


SWITCH — TRIGGER (w/mounting hardware) 




2 


WASHER, «/„ ID x % inch OD 




1 


CABLE HARNESS, AC 













REF. 


PART NO 


SERIAL/MODEL NO. 


NO. 




EFF. 


DISC. 




437-0077-00 


100 


939 




437-0077-01 


940 




1 


42(5-0254-00 








212-0004-00 








212-0002-00 






2 


426-0253-00 






3 


386-0148-00 








212-0002-00 







CABINET, assembly 
CABINET, assembly 
cabinet includes: 

FRAME, front, bottom 

mounting hardware: (not included w/frame) 

SCREW, 8-32 x 5 /! 6 inch, BHS 

SCREW, 8-32x 74 inch, 100° CSK FHS phillips 

FRAME, front, left 
PLATE, side 

mounting hardware for each: (not included w/plate] 
SCREW, 8-32 xV 4 inch, 100° CSK FHS phillips 






5 -; 














Parts List — Type 114 



CABINET (Cont'dl 



REF. 

NO. 




SERIAL/MODEL NO. 


B 


DESCRIPTION 




EFF. 


DISC. 


4 


426-0255-00 






1 


FRAME, front, top 










- 


mounting hardware: (not included w/frame) 




212-0002-00 






4 


SCREW, 8-32 x% inch, 100° CSK FHS phillips 


5 


351-0095-00 






1 


GUIDE, left 










- 


mounting hardware: (not included w/guide) 




212-0023-00 






1 


SCREW, 8-32 x 3 /„ inch, BHS 




210-0007-00 






1 


LOCKWASHER, external, #8 


6 


377-0119-00 






4 


INSERT, foot 


7 


348-0073-00 






1 


FOOT, bail limiting, left front — right rear (pair) 










- 


mounting hardware for left front: (not included w/foot) 




211-0532-00 






2 


SCREW, 6-32 x 3 / 4 inch, Fil HS 




210-0457-00 






1 


NUT, keps, 6-32 x 5 /i< 6 inch 




348-0074-00 






1 


FOOT, bail limiting, right front — left rear (pair) 










. 


mounting hardware for right front: (not included w/foot) 




211-0532-00 






2 


SCREW, 6-32 x 3 / 4 inch, Fil HS 




348-0073-00 






1 


FOOT, bail limiting, right rear — left front (pair) 










. 


mounting hardware for left rear: (not included w/foot) 




211-0532-00 






2 


SCREW, 6-32 x 3 / 4 inch, Fil HS 




210-0457-00 






1 


NUT, keps, 6-32 x 5 / u inch 




348-0074-00 






1 


FOOT, bail limiting, left rear-right front (pair) 










- 


mounting hardware for right rear: (not included w/foot) 




211-0532-00 






2 


SCREW, 6-32 x 3 /„ inch, Fil HS 


8 


348-0072-00 






1 


FOOT, flip-stand bail 


9 


426-0252-00 






1 


FRAME, front, right 


10 


367-0052-00 






1 


HANDLE 










- 


mounting hardware: (not included w/handle) 




212-0040-00 






2 


SCREW, 8-32 x 3 / s inch, 100° CSK FHS phillips 


ii 


367-0050-00 






1 


HANDLE, pivot, right 




367-0051-00 






1 


HANDLE, pivot, left 


12 


214-0558-00 






2 


WASHER, thrust 


13 


214-0554-00 






2 


BOLT, hinge 


14 


377-0122-00 






1 


INSERT, pivot, right 




377-0123-00 






1 


INSERT, pivot, left 


15 


377-0121-00 






1 


INSERT, frame, left 




377-0120-00 






1 


INSERT, frame, right 


16 


351-0094-00 






1 


GUIDE, right 






5-8 










Parts List — Type 114 



CABINET (confj 



REF. 

NO. 


PART NO. 


SERIAL/MODEL NO. 


» 


DESCRIPTION 


EFF. 


DISC. 


17 


214-0567-00 


100 


939X 


2 


SPRING, grounding 


18 


358-0260-00 


100 


939 


1 


BUSHING, plug-in securing 




358-0293-01 


940 




1 


BUSHING, plug-in securing, left 










- 


mounting hardware: (not included w/bushing) 




211-0541-00 


100 


939 


1 


SCREW, 6-32 xV 4 inch, 100° CSK FHS phillips 




211-0510-00 


940 




1 


SCREW, 6-32 x 3 / 8 inch, PHS 




210-0005-00 


X940 




1 


LOCKWASHER, external, #6 




210-0457-00 


X940 




1 


NUT, keps, 6-32 x 5 / 16 inch 




212-0001-00 






1 


SCREW, 8-32 x V 4 inch, BHS 




210-0007-00 






1 


LOCKWASHER, external, #8 


19 


386-0149-00 






1 


PLATE, top cover 


20 


386-0139-00 






1 


PLATE, rear 


21 


386-0147-00 


100 


939 


1 


PLATE, bottom cover 




386-0147-01 


940 




1 


PLATE, bottom cover 


22 


348-0075-00 






2 


FOOT, rear guard, left and right 










- 


mounting hardware for each: (not included w/foot) 




212-0004-00 






2 


SCREW, 8-32 x 5 / u inch, BHS 


23 


358-0260-00 


100 


939 


1 


BUSHING, plug-in securing 




358-0294-01 


940 




1 


BUSHING, plug-in securing, right 










- 


mounting hardware: (not included w/bushing) 




21 1 -0541 -00 


100 


939 


1 


SCREW, 6-32 x 'A inch, 100° CSK FHS phillips 




211-0510-00 


940 




1 


SCREW, 6-32 x 3 / s inch, PHS 




210-0005-00 


X940 




1 


LOCKWASHER, external, #6 




212-0001-00 






1 


SCREW, 8-32 x 'A inch, BHS 




210-0007-00 






1 


LOCKWASHER, external, #8 






5-9 











Parts List — Type 114 




5-10 










Parts List — Type 114 



ELECTRICAL PARTS 



Values are fixed unless marked Variable. 





Tektronix 








Ckt. No. 


Part No. 




Description 










Bulbs 




B154 


150-043 


Assy, 


Incandescent 


WIDTH-PERIOD 


B298 


150-043 


Assy, 


Incandescent 


POWER 



S/N Range 



Capacitors 



Tolerance rfc20% unless otherwise indicated. 



Cl 01 


Use 283-0000-00 


0.001 /if 


Cer 


500 v 




C115A > 


( 


1.0 /if 








Cl 1 5B | 
C115C ( 


> *295-076 

i 


0.1 /if 

0.009975 /if 




Timing Capacitor (PERIOD) 




C115D J 


1 


975 pf 








C115E 


281-603 


39 pf 


Cer 


500 v 


5% 


C115F 


281-093 


5.5-1 8 pf 


Cer 


Var 




Cl 21 


281-543 


270 pf 


Cer 


500 v 


10% 


Cl 23 


283-067 


0.001 /if 


Cer 


200 v 


10% 


Cl 31 


283-076 


27 pf 


Cer 


500 v 


10% 


Cl 34 


283-010 


0.05 /if 


Cer 


50 v 




C136 


281-523 


100 pf 


Cer 


350 v 




Cl 41 


283-076 


27 pf 


Cer 


500 v 


10% 


Cl 42 


281-523 


100 pf 


Cer 


350 v 




Cl 55 


290-175 


10 /if 


EMT 


35 v 




Cl 71 


281-523 


lOOpf 


Cer 


350 v 




Cl 80 


283-002 


0.01 /if 


Cer 


500 v 




C195A i 


) 


1.0 /if 








C195B | 
C195C | 


> *295-086 

1 


0.1 /if 

0.009975 /if 




Timing Capacitor (WIDTH) 




C195D i 


1 


935 pf 








C195E 


281-622 


47 pf 


Cer 


500 v 


1% 


C195F 


281-093 


5.5-1 8 pf 


Cer 


Var 




C205 


281-523 


lOOpf 


Cer 


350 v 




C205 


283-0032-00 


470 pf 


Cer 




5% 


C206 


281-510 


22 pf 


Cer 


500 v 




C21 8 


281-524 


150 pf 


Cer 


500 v 




C222 


281-523 


lOOpf 


Cer 


350 v 




C231 


281-523 


lOOpf 


Cer 


350 v 




C236 


283-067 


0.001 /if 


Cer 


200 v 


10% 


C246 


283-067 


0.001 /if 


Cer 


200 v 


10% 


C253 


290-162 


22 /if 


EMT 


35 v 




C254 


283-059 


1 /if 


Cer 


25 v 




C264 


283-059 


1 /if 


Cer 


25 v 




C283 


290-122 


1000 /if 


EMC 


50 v 




C284 


283-0059-00 


1 /if 


Cer 


25 v 




C290 


290-175 


10 /if 


EMT 


35 v 




C298 


290-086 


2000 /if 


EMC 


30 v 





100-499 

500-up 



X576-up 



5-11 




Parts List— Type 114 



Ckt. No. 



D101 
D114 
Dll 5 
Dll 8 
D131 
D136 



D141 

D156 

D161 

D177 

D193 



D196 

D206 

D208 

D209 

D232 



D236 

D237 

D238 

D244 

D282 



D283 

D284 

D293 

D298 

D299 



F281 



J101 

J239 

J279 

P281 



Q115 

Q125 

Q134 

0145 

Q155 



Q164 

Q174 

Q184 

Q194 

Q205 



Diodes 



Tektronix 

Part No. Description S/N Range 



*152-075 


Germanium 


Tek Spec 


*152-185 


Signal 


Replaceable by 1N3605 


152-0071-00 


Germanium 


ED-2007 


*152-1 85 


Signal 


Replaceable by 1N3605 


*152-075 


Germanium 


Tek Spec 


*152-185 


Signal 


Replaceable by 1N3605 


*152-075 


Germanium 


Tek Spec 


*152-185 


Signal 


Replaceable by 1N3605 


*152-185 


Signal 


Replaceable by 1N3605 


*152-075 


Germanium 


Tek Spec 


*152-075 


Germanium 


Tek Spec 


*152-185 


Signal 


Replaceable by 1N3605 


*152-075 


Germanium 


Tek Spec 


*152-185 


Signal 


Replaceable by 1N3605 


152-076 


Zener 


Z 

CO 

XI 

to 

CO 

< 

* 

o 


*152-1 85 


Signal 


Replaceable by 1N3605 


*152-185 


Signal 


Replaceable by 1N3605 


*152-185 


Signal 


Replaceable by 1N3605 


*152-185 


Signal 


Replaceable by 1N3605 


152-141 


Silicon 


1 N3605 


152-066 


Silicon 


1N3194 


152-066 


Silicon 


1N3194 


152-055 


Zener 


1N962A 1 1 v, .4 w, 5% 


*152-185 


Signal 


Replaceable by 1N3605 


152-066 


Silicon 


1N3194 


152-066 


Silicon 


1N3194 




Fuse 




159-029 


0.3 Amp 3AG Slo-Blo 






Connectors 




131-352 


BNC Coax, female 




131-352 


BNC Coax, female 




131-352 


BNC Coax, female 




131-150 


3 wire motor base, male, chassis mounted 




Transistors 




*151-108 


Replaceable by 2N2501 




*151-133 


Selected from 2N3251 




*151-108 


Replaceable by 2N2501 




*151-108 


Replaceable by 2N2501 




*151-108 


Replaceable by 2N2501 




*151-108 


Replaceable by 2N2501 




*151-108 


Replaceable by 2N2501 




151-107 


2N967 




*151-108 


Replaceable by 2N2501 




*151-108 


Replaceable by 2N2501 





X576-up 






5-12 




Parts List — Type 1 1 4 



Transistors (Conf’c/J 



Tektronix 

Ckt. No. Part No. Description 



Q215 


*151-108 


Replaceable by 


2N2501 






Q224 


*151-108 


Replaceable by 


2N2501 






Q234 


*151-108 


Replaceable by 


2N2501 






Q244 


*151-127 


Selected from 2N2369 






Q254 


Use *153-0543-00 


Selected 2N2501 








Q264 


Use *153-0543-00 


Selected 2N2501 








Q284 


*151-108 


Replaceable by 2N2501 






Q294 


*151-136 


Replaceable by 2N3053 






Q297 


*151-148 


Selected (RCA 40250) 












Resistors 






Resistors 


are fixed, composition, 


d=10% unless otherwise indicated. 






R101 


316-102 


1 k 


'A W 






R102 


316-473 


47 k 


'A W 






R114 


321-321 


21.5 k 


Vs W 




Prec 


R115A,B 


311-114 


2 x 250 k 




Var 




R116 


321-317 


19.6 k 


Vs W 




Prec 


R118 


316-222 


2.2 k 


'Aw 






R119 


316-271 


270 a 


'Aw 






R120 


303-511 


510 ft 


1 w 






R121 


316-222 


2.2 k 


’Aw 






R123 


315-161 


160 ft 


'Aw 






R124 


304-471 


470 ft 


1 w 






R125 


311-442 


250 ft 




Var 




R131 


316-181 


180 ft 


'Aw 






R132 


316-471 


470 ft 


'A w 






R136 


Use 316-0223-00 


22 k 


Vi w 






R142 


316-472 


4.7 k 


'Aw 






R144 


316-472 


4.7 k 


'Aw 






R154 


302-471 


470 ft 


Vi W 






R156 


316-103 


10k 


'Aw 






R161 


316-103 


10k 


'Aw 






R163 


316-101 


100 ft 


'Aw 






R164 


316-223 


22 k 


'Aw 






R171 


316-102 


1 k 


'Aw 






R173 


316-101 


100 ft 


Vi W 






R174 


316-392 


3.9 k 


'Aw 






R175 


316-181 


180 ft 


'Aw 






R177 


316-103 


10k 


Vi w 






R180 


311-462 


1 k 




Var 




R181 


316-332 


3.3 k 


'Aw 






R182 


316-222 


2.2 k 


'Aw 






R183 


316-103 


10k 


'Aw 






R184 


316-221 


220 ft 


'Aw 






R192 


316-103 


10k 


'Aw 






R204 


302-222 


2.2 k 


Vi w 






R205 


315-301 


300 ft 


Vi w 






R205 


315-0471-00 


470 ft 


'Aw 







S/N Range 



] % 

VARIABLE (PERIOD] 
1 % 

5% 

5% 

PERIOD CAL 



WIDTH CAL 



5% 100-499 

5% 500-up 



©I 



5-13 




Parts List — Type 114 



Ckt. No. 



R207 

R209 

R214 

R216 

R218 



R221 

R222 

R224 

R225 

R228 



R231 

R232 

R234 

R238 

R244 



R246 

R266 

R267 

R268 

R269 



R270A / B 

R271 

R272 

R273 

R274 



R276 

R278 

R283 

R284 

R285 



R290 

R291 

R292 

R293 

R294 



R298 



SW120 

SW190 

SW230 

SW260 

SW281 

SW282 



Resistors fCon’cfJ 



Tektronix 






Part No. 


Description 


S/N Range 



316-220 


22 a 


'Aw 






302-152 


1.5k 


'Aw 






305-621 


620 a 


2 w 




5% 


316-270 


27 a 


■Aw 






316-271 


270 a 


'Aw 






316-101 


ioo a 


'Aw 






316-271 


270 a 


'Aw 






323-213 


1.62 k 


'Aw 


Prec 


1% 


311-018 


20 k 




Var 


VARIABLE (WIDTH) 


316-100 


10a 


'Aw 






316-101 


ioo a 


'Aw 






316-103 


10 k 


'Aw 






302-222 


2.2 k 


'Aw 






316-10? 


1 k 


'Aw 






308-049 


330 a 


10 w 


WW 


5% 


301-620 


62 0 


'Aw 




5% 


305-510 


51 a 


2 w 




5% 


305-510 


51 a 


2 w 




5% 


305-510 


51 a 


2 w 




5% 


305-510 


51 a 


2 w 




5% 


311-513 


2x150 a 




Var 


VARIABLE (AMPLITUDE) 


305-101 


ioo a 


2 w 




5% 


305-101 


ioo a 


2 w 




5% 


303-301 


300 0 


1 w 




5% 


303-360 


36 a 


1 w 




5% 


305-360 


36 a 


2 w 




5% 


303-270 


27 a 


1 w 




5% 


308-240 


2a 


3 w 


WW 


5% 


316-392 


3.9 k 


'Aw 






316-562 


5.6 k 


'Aw 






311-442 


250 0 




Var 


+25 VOLTS 


301-112 


1.1 k 


'Aw 




5% 


315-751 


750 0 


'A w 




5% 


316-103 


10k 


'A w 






316-393 


39 k 


'Aw 






307-051 


2.7 0 


'Aw 




5% 






Switches 






Unwired Wired 










260-671 *262-696 


Rotary 




PERIOD 




260-671 *262-697 


Rotary 




WIDTH 




260-613 


Toggle 




TRAILING EDGE-LEADING EDGE 


260-672 *262-698 


Rotary 




AMPLITUDE 




260-613 


Toggle 




POWER 




260-675 


Slide 




115 V AC-230 V AC 





5-14 




Parts List — Type 114 



Transformers 



Tektronix 
Ckt. No. Part No. 



Description 



S/N Range 



T131 

T281 



*120-370 Toroid; 3 windings 

*120-369 Power 




TEST CONDITIONS 



All Voltage Readings were obtained under the following conditions 
unless otherwise noted on the specific diagrams: 



Line Voltage 
Dc Voltmeter Impedance 

Control Settings: 

All VARIABLE controls 

PERIOD 

WIDTH 

AMPLITUDE 

TRIGGER switch 



1 1 7 volts 
20,000 12 / volt 



counterclockwise (CAL) 
100 fi S 

10/aS 

+ 3 to 10 V 
LEADING EDGE 



Voltage readings shown in blue on the schematics were obtained 
with a 20,000 12/volt meter and in some cases show meter loading. 
All voltages measured with respect to the outside shell of C283 unless 
otherwise (*) indicated. 

Voltage readings may vary somewhat between instruments due 
to normal manufacturing tolerances and component characteristics. 
Waveforms shown on the schematics were obtained from the crt 
of a Tektronix Type 547/ 1A1 Oscilloscope. 





PULSE. GENERATOR 






OUTPUT AMPLIFIER 4 POWER SUPPLY 




TYPE 114 



TEXT CORRECTION 

Section 1 Characteristics 

Page 1-1, 1st coluan, Pulse Width 

CHANGE: 2nd sentence to read: 

With the width VARIABLE control at the CAL end of its range, the width 
accuracy is within *396 (+10 ns on negative pulse) of indicated value at 
10 as through 1 us positions. At the 100 as position, accuracy is within 
* 356 (+10 ns on negative pulse)* 



C2/767 




TYPE Ilk 



PARTS LIST CORRECTION 



CHANGE TO: 



C115A 




1.0 UP 




C115B 


j *295-0108-00 


0.1 IIP 


Timing Capacitor (PERIOD) 


C115C 




0.009925 yF 




C115D 




960 pF 





* Checked assembly 



SCHEMATIC CORRECTION 




PULSE GENERATOR 



M10,952/667