Tektronix PG 501 User manual

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TABLE OF
CONTENTS
SECTION 1

OPERATING INSTRUCTIONS
Instrument Description

1-1
Preparation For Use

1-1
Operating Considerations

1-1
Operating Modes

1-3
Functions Available at Rear
Connector

1-4
Definitions of
Pulse Characteristics

1-5
Electrical
Characteristics

1-6
SECTION 2

THEORY
OF OPERATION

2-1
SECTION 3

SERVICING INFORMATION
Page
Adjustment Procedure

3-1
Diagrams & Parts Lists
Electrical Parts List

3-3
Mechanical Parts List

3-9

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Section 1-PG 501
OPERATING
I

INSTRUCTIONS
I
INSTRUMENT
DESCRIPTION
t
The PG 501 Pulse Generator is designed
to operate in a
TM 500 Series Power Module . The
generator provides
simultaneous positive
and negative 50 MHz output pulses
with 5 ns rise and
fall times and independently variable
amplitudes
from 0 .5 V to 5 V . Front panel controls provide
calibrated decade
selection of pulse period from 20 ns to
20 ms and duration
from 10 ns to 10 ms . Uncalibrated
pulse
period from 20 ns to 0 .2 s and duration from 10 ns to
0 .1 s can be obtained
with the variable controls .
PREPARATION
FOR USE
Introduction

Turn-On
Procedure
The PG 501 is calibrated and ready
for use when

1 . Check
that the PG 501 is
fully inserted into the
received . It is designed to operate
in any compartment of a

Power Module
.
TM 500 Series Power Module
only . Refer to the Power
'

Module Instruction Manual
for line voltage requirements

2~ Pull
the
PWR switch on the Power Module to
and Power Module operation
.

apply power to the PG 501 . Check that the
POWER
indicator on the PG 501 front panel comes on .
'

I nstallation and
Removal
1 . Install by
aligning the upper and lower rails on the
PG 501 with the
Power Module tracks and inserting until
the plug-in panel
is flush with the Power Module panel .
In addition to
the normal pulse output mode, a
locked-on mode
is provided which holds the outputs at a
selected DC level . Also
included is an output gated mode
which ties an external
trigger input at the front panel to the
outputs . A
trigger output that occurs approximately 10 ns
prior to the
normal pulse output is available at the front
panel .
Turn the
PowerModule off before inserting the plug-
in ; otherwise, damage may
occur to the plug-in
circuitry .
2 . Remove by pulling the
release latch at the bottom of

3 . Refer to the
Front-Panel Controls, Connectors, and
the PG 501 front panel and
sliding the plug-in straight out

Indicators description
on the Controls and Adjustments
of the Power Module .

foldout page in
Section 3 .
OPERATING
CONSIDERATIONS
Output
ConneCtIOnS

Pulse
characteristics can be preserved by observing the
The
output of the PG 501
operates
as
a voltage

following precautions :
source behind 50 S2
and works into
a 50 S2 load .
An unterminated or improperly terminated
output will

1 . Use
high quality 50 S2 coaxial cables and
connectors .
cause excessive aberrations
on the output pulse (see
Impedance Matching)
. Loads less than 50 SZ will reduce
the
pulse amplitude .

2 . Make all connections tight and as short as
possible .
REV .
B,
MAY,
1975

Operating Instructions-PG 501
3 . Use high quality attenuators,
if necessary, to reduce

Impedance MatChlng
the pulse amplitude to
sensitive circuits .
4 . Use terminators or impedance
matching devices to
avoid reflections .
5 . Insure that attenuators, terminations, etc ., have
adequate power handling capabilities for the output
pulse
(approximately 0 .5 watt into a 50 SZ load) . Power output is
determined by the duty factor of output pulse current .
If the reflected signal returns before the pulse is ended it
adds to or subtracts
from the amplitude
of
the pulse
.
This
distorts the pulse shape and amplitude . The following
Risetime and Falltime

describes methods for matching impedance networks into
relatively low impedances . If the PG 501 is driving a high
If the output pulse from the PG 501 is used for

impedance, such as the 1 MSZ input impedance of the
measuring
the rise or falltime of a device, the risetime

vertical input for an oscilloscope, the transmission line
characteristics of
associated equipment may have to be

should be terminated
into
a
X10
50
S2 attenuator
and 50
SZ
considered .
If the risetime of the device under test is at

termination at
the oscilloscope input . The
attenuator
least 10 times longer than the combined risetimes of
the

isolates the input
capacity
of
the
oscilloscope . Distortion
PG 501
plus the monitoring oscilloscope and associated

can be caused by this input capacity .
cables, the error introduced will not exceed 1% and
generally
can be ignored . If the rise or falltime of the test
device, however, is less than 10 times
as long as the combined
risetimes of the testing system,
the actual risetime of the

A
simple resistive impedance-matching
network, that
device will have to be determined
from the risetime of each

provides minimum attenuation, is illustrated
in Fig . 1-1 .
To
component making
up the system . This equals the square

match impedances with the illustrated network, the follow-
root of the sum of the squares of
the individual risetimes .

ing conditions must exist :
Conversely, the risetime of
the device under test can be
found from the
same relationship if the actual risetimes in

(R t
+ZzIRz
the system
are known except that of the device under test .

R

+Z

+
R

must equal Z,
i 2 z
The physical and electrical
characteristics of the pulse
transmitting cable
determine the characteristic impedance,
velocity of propagation, and
amount of signal loss . Signal
loss, due to
energy dissipation in the cable dielectric, is
proportional to the frequency ; therefore, a few
feet of
cable can attenuate high frequency information
in a
fast-rise pulse . It is important, therefore, to keep
these
cables as short as possible .
When signal comparison measurements or time differ-
ence determinations are
made,
the two
signals from the test
device should travel through
coaxial cables with identical
loss and time delay
characteristics .
A mismatch, or different impedance in a transmission
line, generates a reflection back along the line to the source .
The amplitude and polarity of the reflections are deter-
mined by the load impedance in relation to the character-
istic impedance of the cable . If the load impedance is higher
than
the characteristic impedance of the line, the reflection
will be of the same polarity as the applied signal, if it is
lower, the reflection will be of opposite polarity .
and
z,
(Low)
z, <z z
R,
+
Z
~
RR

must equal Z z
i 2
To match impedances :
R, RZ - Z, Z z and R, Z, . R z IZ~ - Z,1
s
t
If there is a DC
voltage across the output load, the

z z
output pulse
amplitude will be compressed, or in some

or :

R,

-

z, iz, - z, I

and Rz -_
z,

z

_
z
cases, if the voltage exceeds ±10
V, it
may
short the output .
To prevent
this from occurring, the output must be coupled
through a DC
blocking capacitor to the load . The time
constant of the coupling
capacitor and load must be long

F ;g . T-T . Impedance
matching network that provides minimum
enough to maintain pulse
flatness .

attenuation .

Therefore :
R~ R z =Z i Z z ; and R~Z~ =
Rz(Zz
- Z,1
orR~= Z z (Z z -Z~)
and R z = Z~

Zz
Z
z - Zi
For example ; to match a 50 SZ system to a 125 S2 sys-
tem, Z i equals 50 SZ and Z z equals
125 St .
Therefore :
Normal
R ~ _~ 125(125 - 50) = 96 .8 ohms
and R z = 50~

125 12 50
=
64
.6 ohms
Zo
=~e
8
loge
o
D/d
In the normal
mode, the period generator free runs at
the rate set
by the PERIOD selector and VARIABLE
control
. The duration of the output pulse (see Definitions
of
Pulse Characteristics) is set by the DURATION selector
and
its associated VARIABLE control . Amplitude is set by
the + and - OUTPUT
AMPLITUDE
controls . The PERIOD
and
DURATION selectors are mechanically coupled so the
duty
factor cannot exceed 50% with the VARIABLE
controls in the X1 position .
Output Locked On
When the
DURATION selector is in the LOCKEDON
position, the +
and - output remain locked at a DC level
'

selected by the OUTPUT
AMPLITUDE controls (<0 .5 V
to 5 V) .
Though
the network in Fig . 1-1 provides minimum
attenuation for a purely resistive impedance-matching
device, the attenuation as seen from one end does not equal
that seen
from the other end . A signal (E i ) applied from
the lower impedance source encounters a voltage atten-
uation (A~ ) which is greater than 1 and less than
2, as
follows :
A~
Ez Z z
A signal (E z ) applied from the higher impedance source
IZ
z ) encounters a greater voltage attenuation
(A z ) which is
greater than 1 and less than 2 (Z z
/Z~
1 :
E z R~ R~
A z =
E ~=
Rz
+ Z,
+1
In the example of matching 50 St to 125 S2,
Operating Instructions-PG 501
When constructing such a device, the
environment

96 .8
surrounding the components should also be designed to

'°`i

=
125
+
1 = 1 .77
provide a transition between the
impedances . Keep in mind
that the characteristic
impedance of a coaxial device is

and
determined by the ratio
between the outside diameter of
the
inner conductor to the inside diameter of the outer

96 .8

96
.8
conductor

A
z
=

+

+ 1 = 4 .43
64 .6 50
where e is the
relative dielectric constant, D is the inside

The illustrated network
can
be modified to
provide
diameter of the
outer conductor and d is the diameter of

different attenuation ratios
by
adding
another resistor (less
the inner
conductor (e e =
1) .

than R ~
1
between Z~ and
the junction of R i and R z .
OPERATING MODES
External Trigger
The period generator is disabled when the PERIOD
selector is in the
EXT TRIG position . An external
positive-going
trigger signal at least 1 V in amplitude
applied to the
TRIG/DURATION IN connector will trigger
the duration
generator
. The duration
of
the output
pulse is
variable with the front-panel
DURATION selector while
period is
dependent
on
the triggering signal frequency (see
Fig . 1-2) . The triggering signal must remain below +100 mV
for 10 ns to reset the generator for the next trigger .
If the input trigger contains a DC component which
prevents it from moving within the +1 V turn on and
+100 mV reset levels, the trigger should be capacitively
coupled . The time constant of the coupling network should
be sufficient to obtain the full frequency capabilities of the
instrument .

Operating Instructions-PG 501
Fig . 1-2 . External trigger signal vs output
pulse in EXT TRIG mode .
External
Duration
When the
DURATION selector is in the EXT DUR-
ATION
position, the period generator is disabled
. The
outputs can
then be turned on by applying a positive-going
signal to the
TRIG/DURATION IN connector . The
outputs
will
turn
on when the external signal amplitude
reaches
+1 V and
turn off when the signal amplitude drops to the
+100 mV lower
threshold . The period and duration of the
output pulses
is dependent on the period and duration of
the external
signal (see Fig . 1-3) .
Duration variable
with
front-panel DURATION
selector up to 70% of out-
put pulse period .
Output
Pulse
External Trigger
Signal
Amplitude
variable with
front-panel
OUTPUT
AMPLITUDE
controls .
+1 V
(Maximum
L
Recognition
Level)
+100
mV
(Minimum
Reset Level)
+100 mV
lower threshold, the external signal should be
capacitively coupled . The time constant of the
coupling '~
network should be long enough so the external
remains
above the turn-on level (~ + 1
V) for its entire duration .
+100 mV ----
+1 v -
Output
Pulse
External
Pulses
Output
Pulse
+10U mV ---~----~~

~

I

~

) Squarewave

~
External
NOTE
Output pulse amplitude is
variable with the front-
panel OUTPUTAMPLITUDE controls .
If the
external signal contains a DC component
which

Fig . 1-3 . External gating signals vs
output pulses in EXTDURA-

,
prevents it
from moving within the +1 V turn on
level and

TIONmode .
FUNCTIONS
AVAILABLE AT REAR CONNECTOR
Pretrigger Output `

selected by the
Amplitude Monitor Switch, S150,
(+,
OFF,
and -) .
Rear connector
pins 27B and 28A (with grounds on
pins
27A and 28B)
provide a buffered pretrigger
signal that

External Trigger Input
occurs approximately
10 ns before the normal output
pulse . The pretrigger
signal
is
approximately 1 V from 27
S2

An external trigger
signal can be applied through the rear
with period determinedby the
PERIOD selector setting .

connector by connecting an
appropriate length of coaxial
cable to pins
24B (center conductor) and 25B (groundl .
Connect the
opposite end of the cable to the point on
the
Averaged
Amplitude Output

circuit board
where the cable from the front-panel
TRIG/
DURATION
IN is connected . The external
trigger input to
Rear connector
pin 25A (with ground on
pin 26A)

the rear connector is then
in parallel with the front-panel
provides an averaged
amplitude output which is
internally

TRIG/DURATION
IN .
REV . B, AUG . 1974

'

Other Functions Available

cations (see Rear Connector Pin Assignments in
Section
3) .
One or more compartments
of a multi-plug-in Power
Module can be wired with
barriers installed
to
provide
Unassigned pins are available at
the rear connector for

specific functions between compartments . See Power
routing signals
to and from
the PG 501
for specialized appli-

Module instruction manual for additional information .
I

DEFINITIONS
OFPULSE
CHARACTERISTICS
The following is a glossary of common pulse character-

Falltime-The time interval, at the pulse trailing
edge,
istics
used in this manual . They are also illustrated
in

for
the
pulse amplitude to fall from the 90% amplitude
Fig .
1-4
.

level to the 10% amplitude level .
'

Amplitude-The maximum absolute peak value of a
pulse, regardless of sign excluding unwanted aberrations or

Flatness-The absence of long term variations to the
overshoot, from the zero axis . Measured between a point

pulse
top ;
excluding overshoot, ringing or pulse rounding .
that is 50% of the pulse duration (pulse top) to a baseline

Sometimes referred to as tilt or slope .
reference that is 50°~ of the off time (pulse period minus
pulse duration) .

Overshoot-The short term pulse excursion (or transient)
above the pulse top or below the baseline ; which is
Aberration-Unwanted deviations or excursions in the

simultaneous
to the leading and trailing
edge of
the pulse
.
pulse shape from an ideal square corner and flat top, i .e .,
overshoot, undershoot or rounding, ringing, and tilt or
slope .

Period-The time interval for a full pulse cycle . Inverse
of frequency or repetition
rate .
Interval between corre-
sponding pulse
amplitudes of two consecutive undelayed
or
Baseline-The quiescent DC voltage reference level of the

delayed

pulses
.

Generally

measured

between

the
50%
pulse waveform .
amplitude levels of two consecutive pulses .
Duty Factor-Sometimes referred to as duty cycle . The
ratio of
pulse duration to period or
the product
of pulse

Preshoot-A transient excursion which precedes the step
duration

and

pulse

repetition

rate .

Duty

Factor

% =

function . It may be of the same or opposite polarity as the
Duration/Period X 100 .

pulse .
Overshoot

Pulse Duration
Pulse Top

Pulse
Flatness

/ Top
Preshoot
.10%
90%~
Ringing
'I

Rounding

I t
Rounding
90°~
-Rise Fall
Time Time
Duty
Factor= Pulse Duration/Pulse Period
50°~ 50%
Baseline
Flatness
Pulse Period
T = 1/Rate
Fig . 1-4 . Pulse characteristics .
50%
Operating Instructions-PG
501
Amplitude
50%

Operating Instructions-PG 501
Pulse Duration-The time interval between the leading

Risetime-The
time interval, at the step function leading
and trailing edge of a pulse at which the instantaneous

edge, for the pulse to
rise from the 10% to 90% amplitude
amplitude reaches 50% of the peak pulse amplitude .

levels .
Polarity-The direction from the baseline of the pulse
excursion . Either positive-going
(+)
or negative-going
(-) .
Tilt or Slope-A distortion of an otherwise flat-topped

,
Ringing-Periodic

aberrations

that

dampen

in

time,

pulse, characterized by either a decline or a rise of the pulse
following the overshoot .

top . (See Flatness) .
ELECTRICAL
CHARACTERISTICS

,
Performance Conditions

DUTY
FACTOR : At least 70% for periods of 0 .2 /ts or
more . Duty
factor decreases to 50% at 20 ns period .
The
electrical characteristics are valid only if the PG

Minimum off
time is 10 ns .
501 :
(1) has been calibrated at an ambient temperature
between
+20 ° C and +30 ° C, (2) is operating at an ambient
temperature
between 0 ° C and +50 ° C unless otherwise

PULSE
RISETIME AND FALLTIME : 3 .5 ns or less
noted and (3) outputs
are terminated into a 50 SZ load .

from 2 V to at least 5 V into a 50 S2 load .
NOTE
Definitions of some of the more common pulse
characteristics specified here are described and illus-
trated
under Definitions of Pulse Characteristics .
Rounding or Undershoot-The rounding of the pulse
corners at the
edgesof a step function .
ABERRATIONS (see Fig . 1-4) : Within 3.5% at 5 V pulse

~ ,
amp( itude
.
PULSE AMPLITUDE : 0 .5
V or less to at least 5 V into
50 SZ load .
PULSE COINCIDENCE (+ and -
Outputs) : Leading
edge of pulse outputs
within 1 ns of each other (measured
at 50% amplitude
points) .
PULSE PERIOD : 20 ns or less to 20
ms (within 5% from
0 .2 ps to 2 ms and within 15% at 20 msl in decade steps
with the VARIABLE control fully ccw (X11 .
VARIABLE

TRIGGER OUTPUT
:
At least 1 V into 50 S2 load
extends
period to at least 0 .2
sin full cw position (>X101
.

occurring approximately 8 ns prior to pulse output .
EXTERNAL TRIGGER DURATION INPUT : At least
PULSE DURATION
: 10 ns or less to 10 ms (within 5%

1
V
not to exceed +5 V (DC+peak AC) . Trigger/Duration
from 0 .1 lts to 10
ms) in decade steps with the VARIABLE

Recognition

Level +1 V or less . Trigger/Duration Reset

,
control fully ccw (X1) .
VARIABLE extends duration to at

Level +100 mV or less . Minimum On and Off Time 10 ns
least 0 .1 s in fully cw position (>X101 .

(measured at 50% amplitude points) .
REV B,
NOV 1978

,

Section 2-PG 501
Introduction

R44/R45/R65
which establishes the threshold level for the
The
following is a brief discussion of
the basic operation

trigger signal
applied to pin 12 of integrated circuit U30C
in
of the major
circuits in the PG 501 .
The simplified block

the duration
generator . Also, a trigger signal
from the
diagram
in Fig . 2-1 and detailed
schematic diagrams on

collector of
040 is applied to the base of 052
in the trigger
foldout
pages at the back of this
manual are provided to aid

output
amplifier . Transistors 050 and
Q52 comprise the
trigger output amplifier circuit
which operates as a current
in
understanding this discussion
.

mode switch with the base of 050 biased at a
DC level
established by resistor network
R48/R50/R52 . Resistor
R48 also drops the voltage
to the collectors of 040 and
Period Generator

042 .
Period generator
U30B operates as an
astable multi-
vibrator in the
normal pulse output mode
. Multivibrator

The collector of 052 produces
the trigger signal available
frequency is
determined by the feedback
resistance and

at
the front-panel TRIG OUT
connector . Transistor 050
capacitance
switched (by the
PERIOD cam switch S30A)

produces the internal trigger
signal which is available at pins
between
the gate input, pin 10, and
the inverting, non-

27B and
28A at the PG 501
rear connector .
inverting outputs
at pins 6 and 7 respectively
. When pin 7 is
high, pin 6 is
low (below the level at
pin 10) . Therefore,
' ~ current
is pulled from pin 10
through the feedback

Duration Generator
resistance

(selected by the
PERIOD cam switch S30A)

The trigger signal from
the collector of 042 in the trigger
between
pins 6 and 10 . The
feedback capacitor (selected by

amplifier is fed to
pin

12 of U30C which causes the
PERIOD cam switch S30A) then
discharges through the

non-inverting output at
pin 15 to go high and pin 14 to go
feedback
resistance until the threshold
level of gate U30B is

low . Pin

13 is also
pulled high through

R67 and
C67 .
reached .
At this point, pin 7 starts
to go low . Due to

Integrated
circuit U30C is then latched .
'

positive
feedback through the timing
capacitor, pin 10 is
forced
below its switching
level . Pin 6 abruptly switches
high
. Voltage at pin 6 is now
above that at pin 10 which

piode CR69 is biased
off when pin 14 went low, and,
causes current to reverse
through the feedback resistors and

since the base of
080 went high with pin 15, current
forces current into the
timing capacitor . Voltage at
the gate

ghrough R77
passes through 080 and pulls 5 V
zener VR79
input,

pin

10, rises

until

the gate

again

reaches

the

low .
Subsequently, the base of 082 goes lowand
turns 082
threshold level
from the negative direction
. As pin 7 starts

off, thus
allowing the timing capacitor (selected by
DURA-
its transition
to the high state,
positive feedback causes pin

TION cam switch S30B) to discharge through
the timing
10 to be
drawn high . Pin 6 goes low and
U30B has thus

resistor . The resultant ramp appears at the base of
070 .
completed a switching cycle .
The period of oscillation is

When the ramp voltage drops low
enough, 070 turns on
dependent on the RC time constant
of the feedback

and pulls down on pin 13 of U30C and
causes U30C to
network selected by the
front-panel PERIOD selector S30A

reset . Pin 15 now goes low and pin 14 goes
high . Diode
and PERIOD
VARIABLE control R38 . Period
Cal poten-

CR69 is biased on turning
off
080
which allows zener
tiometer R23
calibrates the output pulse period .
Resistors

VR79 to step high,
turning
on
082 . The timing capacitor
R26 and R37
are external pull-down resistors
for the

now begins to
charge through current limiting resistor R84 .
integrated circuit gate
outputs .

Thus, the duration generator is reset for the next input
trigger .
Trigger and
Trigger Output AmpIIfierS

Timing current
is established by front-panel DURATION
The outputs from pins 6 and 7 of
U30B are fed to

VARIABLE
control R95 and is calibrated by Duration Cal
transistors 040 and 042 which
comprise the trigger

potentiometer
R90 . Resistors R91, R96, and R98 are
amplifier . The collector of
042 is tied through trigger-

shunts
that control duration range when switched in by
shaping capacitor C42, then
through resistor network

DURATION cam switch S30B .

Theory of Operation-PG501
2-2
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Output Buffer
Output buffer U30A is the third section of integrated
circuit U30 . As the name implies, U30A buffers and shapes
the output of duration generator U30C for the output
amplifiers . The output of U30A is a push-pull pulse which
is applied to the base of transistors Q110 and Q115 in the
+
amplifier and to the base of Q150 and Q155 in the
- amplifier .
Theory of Operation-PG 501
The 47 SZ series-parallel network along with the emitter
of Q140
looks like a source impedance of approximately
50 Sl during the pulse on condition . (During the pulse off
condition, the source impedance is higher .) Resistor R141
pulls the output of Q140 low during the pulse off
condition . Diode CR141 protects the Q140 output from
inductive loads . Resistor R138 pulls an offset voltage
through R136 and R137 which biases Q140 nearly on to
improve pulse response when the signal from Q136 steps
high .
Network R148/C148/C149 picks off a small amount of
Output Amplifiers

the output pulse, filters it, and applies it through Ampli-
tude Monitor switch S150 to rear connector pin 25A .
Thetwo output amplifiers operate identically except for
output polarity . The +output amplifier uses
PNP
transis-
tors where
the -amplifier uses NPN transistors .
To
complete the voltage inversion, the diodes in the +amplifier
are electrically opposite of those in the - amplifier . Due to

External Trigger/Duration Mode
the similarity of the output amplifiers, the remainder of

Period generator U30B is utilized in a Schmitt bistable
this discussion concerns the +output amplifier with

multivibrator configuration in the EXT TRIG and EXT
differences mentioned where pertinent .

DURATION modes . Contact 15 on PERIOD selector cam
switch S30A connects feedback resistor R29 between pins
7 and 9 of U30B and, thus, enables U30B to operate as a
bistable switch .
Transistors Q110 and Q115 comprise a current mode
switch driven by output
buffer
U30A
.
This
circuit also
shifts the input voltage from U30C to a positive level and

Diodes CR17 and CR20 with their associated RC
" provides a
push-pull
potential at R110 and R115 to drive

networks shift and clamp the ground-referenced input
the bases of buffer emitter followers Q120
and
Q124 .

signal from the TRIG/DURATION IN connector down to
Emitter followers Q120 and Q124 allow lower source

the proper operating level for U30B, i .e ., between -2 V and
impedance drive for the bases of the output driving current

-0 .8 V .
switch composed of Q130 and Q136 . The current through
Q130 and Q136 is variable with the front-panel + OUTPUT
AMPLITUDE control R134 . Maximum current through

Normally, the output from pins 6 and 7 of U30B is
Q130 and Q136, thus, the maximum output amplitude at

applied to trigger amplifier transistors Q40 and Q42 .
the
+
output connector is adjusted by
+
Amplitude Cal

However, in
the EXT
DURATION mode, contact 1 is
potentiometer R114 . Potentiometer R114 adjusts the

closed and 2 is opened by DURATION cam switch S30B
emitter voltage at Q130 and Q136 which changes the

which bypasses the period generator output signal around
voltage drop across 8132 and R134
.
At maximum output

the
duration generator and
applies
it directly to pin
4
of
amplitude R134 is at minimum voltage drop so the current

output buffer U30A . Output buffer U30A and the output
is
actually set
by
R132,
the end
resistance
of
potentiometer

amplifiers function as described for normal pulse output
R114, and the voltage difference
between
the +18
V supply

operation .
and the emitter voltages .
Inductor L132 , provides isolation from the effects of

Output LOCked On Mode
R132 on the emitters of Q130 and Q136 . The collector of

In the LOCKED ON mode, contact 13
of
DURATION
'

Q130 is tied to R130 and zener VR130 to reduce the

cam switch S30B closes while contacts 1
and
2
are open .
power dissipated in Q130 . The collector of Q136 drives the

The voltage at diode CR65
is
then
applied to pin
4
of
base of output transistor Q140 . Peaking inductor L136 and

output buffer U30A . Thus, pin 4
of U30A is high and pin 5
load resistors R136/R137 apply a peaked signal to the base

is low, locking U30A on . Transistor Q115 in the +output
of Q140 providing flat response into 50
S2 .
Output transis-

amplifier and Q150 in
the -
output amplifier turn on .
for Q140 is an emitter follower
driving the +output

Since both output amplifiers essentially follow the state of
connector through the 47
SZ series-parallel resistance net-

the output buffer, the resulting output at the
+
and
work R 143/R 144/R 146/R 147 . Capacitor C 143 (+ Output

- output connectors is a DC level which is variable with
~~

Comp Set) allows the first section
of the
47
SZ network to

front-panel

+

and

- OUTPUT

AMPLITUDE

controls
compensate for the output reactance
of Q140
.

R134/R174 .

Theory of Operation-PG501
Power SupplleS

against the voltage established by 3 V zener VR210 and
R212 . Thus, the voltage at the collector of 0210 is nearly
The +18 V and -18 V
supplies are similar in operation .

3 V below the unregulated line .
The
3 V is reduced by the
The+18 V supply
utilizes PNP transistors where the -18 V

voltage drops at the base-emitter of 0216 and the base-
supply uses
NPN transistors . Due to the similarity of these

emitter of the series-pass transistor in the Power Module to
two
supplies, the +18 V supply will be discussed here with

a maximum of approximately 1 .6 V across R214 . The
the exceptions mentioned where pertinent .

1 .6 V across R214 establishes the maximum current that
can be drawn from
the +18 V supply . Clamp
diode CR224

,
An unregulated
filtered +33 .5 V from the Power Module

Protects
the +18 V supply in case of a short to the -18 V
is applied to
rear connector pins 12A and 12B through

supply .
current limiting resistor R214 to the emitter of the
series-pass transistor located in the Power Module . The

The -18 V supply differs from the +18 V supply in the
collector
of
the series-pass transistor is the +18 V regulated

N , ay
it obtains its
reference
voltage
. The
-5 .1 V and -18 V
output which is monitored by divider network R216/R218

supplies

are

referenced to the +18 V supply . Divider
at the base of 0220 . The emitter of 0220 is tied to
6
.2
V

network R221/R251/CR221/CR222 establishes the refer-

,
zener VR220 which is temperature compensated by
the

ence voltage for the -18 V supply with the voltage
at
the
base-emitter junction of 0220 .

junction of CR222/R251 nearly one diode drop below
ground . This divider voltage is applied to the base of 0250 .
If the +18 V output attempts to go
more positive, the
collector of 0220
pulls
down on
the base of 0210 through

If the -18 V supply output goes more positive, 0250
R211 which tends to turn
off the
base of
0216 . Resistor

starts to turn off which allows R240 to pull down on the
R211 provides current
limiting during plug-in insertion or

base of 0240 . Thus, the collector of 0240 goes high as does
removal . Thus, the
current
through
0216 is reduced which,

the base of the series-pass transistor in the Power Module .
in turn, reduces the base current
in the series-pass transistor

The
voltage drop across

R244

increases which supplies
(in the Power Module) and, also
the voltage across current

more current to the -18 V output,
thus bringing it back to
limiting

resistor

R214
.

Resistor

R215 provides current

the correct voltage .
limiting during
plug-in insertion or removal . Consequently,
the current supplied to
the +18 V line is reduced to the
proper level . Resistor R212
and 3 V zener VR210 establish

The front-panel POWER indicator DS250
is powered
the operating voltage
range for 0210 .

through dropping resistor R253 from the -18 V supply .
If the +18 V output is shorted
(i
.e ., output goes local,

The -5 .1 V supply is also powered from the
-18 V
Q220 starts to turn off which pulls the base of 0210 high

supply . Zener VR260 establishes the
-5 .1 V level with
through

R210 . Consequently, transistor 0210 saturates

current supplied by R260 .

Section
3-PG 501
'

INFORMATION
Contents

Service Available
This

section

of

the

manual

contains

information

Tektronix, Inc . provides complete instrument repair and
necessary to service the PG 501 . Adjustment procedures are

calibration at local Field Service centers and at the Factory
provided on the Controls and Adjustments foldout page

Service Center
.
Contact your local Tektronix Field Office
with
supporting illustrations that show
internal adjustment

or representative for further information .
locations and describe front-panel
control functions . Also
included is the electrical
parts list
with
an
illustration on

Repackaging fOY Shipment
the Component
Location
foldout page that shows the
physical location
of
components . A schematic diagram
is

If the Tektronix instrument is to be shipped to a Tektronix
located
opposite both
the electrical parts list and the circuit

Service Center
for
service or repair, attach a tag
showing :
board

illustration

to
further

facilitate

the

location of

owner (with address) and the name of an individual at your
components . Rear connector pin assignments are listed at

firm that can be contacted, complete instrument serial
the middle of this section .

number and a description of the service required .
Save and re-use the package in which your instrument was
Mechanical
parts are listed at the rear of this section

shipped . If the original packaging is unfit for use or not
with an exploded view of the
instrument
.

available, repackage the instrument as follows :
Surround the instrument with polyethylene sheeting to
protect the finish of the instrument . Obtain a carton of
corrugated cardboard of the correct carton strength and
having inside dimensions of no less than six inches more
Maintenance

than the instrument dimensions . Cushion the instrument
by tightly packing three inches of dunnage or urethane
General system maintenance procedures are provided in

foam between carton and instrument, on all sides . Seal
the

Power

Module

instruction manual, i .e ., preventive

carton with shipping tape or industrial stapler .
'

maintenance, troubleshooting aids, part removal and
replacement procedures, parts ordering information, etc .

The carton test strength for your instrument is 200 pounds .
ADJUSTMENT
PROCEDURE
Introduction

If other test equipment is substituted, control settings or
The adjustment procedure is located on the Controls and

set-up may need altering to meet the requirements of the
Adjustments foldout page . Adjustment is generally required

equipment used . Detailed operating instructions for the test
equipment are not given in this procedure . Refer to the
after a repair has been made, or after long time intervals in

instruction manual for the test equipment if more informa-
which normal aging of components may affect instrument

tion is needed .
accuracy .
Test Equipment Required

1 . Real-Time Oscilloscope . TEKTRONIX 5440 Oscillo-
The following test
equipment or the equivalent, is

scope
with a 5840Time Base and 5A45 Amplifier plug-in
required for complete adjustment of the
PG
501 . Specifica-

recommended .
tions given for the test equipment are the
minimum
necessary for accurate adjustment
. Therefore, some
of
the
specifications listed may be
less
rigorous than
the actual

2 . Sampling Oscilloscope . (Necessary only
if the
+
or
" performance capabilities of the test equipment . All test

- Output Compensation adjustments
are performed . See
equipment is assumed to be correctly calibrated and

Preliminary Considerations
.) TEKTRONIX 5440 Oscillo-
operating within its listed specifications .

scope with 5S14N Sampling
plug-in recommended .
'

REV . B, MAY, 1977

Servicing Information-PG 501
3 . Plug-In Extension . Tektronix 067-0645-02 Calibra-

Preparation
tion Fixture . (Not mandatory for this procedure .)
NOTE
Do not use the Plug-ln Extension to plug the PG 501
into
any instrument
other
than the TM 500 Series
Power Module .
4 .
10X
Attenuator
.
Tektronix Part No . 011-0059-02
recommended .
5 . 50 S2 Coaxial Cable . Tektronix Part No . 012-0057-01
recommended .
Do not preset internal
controls unless they are known to
be
significantly out of
adjustment, or unless
repairs
have
been made in the circuit . In these instances, the internal
adjustments
can be
set
to midrange .
3- 2
1 .
Remove the cover from the left side of the PG 501
and, if
necessary, from the right side . Blow off accumulated
dust with
low-pressure compressed air .
2 . Insert the PG 501 into the left or right compartment

,
(depending on which adjustments are to be made)
if
a
multi-plug-in
Power Module is used . (Note : It may be
convenient
to
use the plug-in extension, Part No . 067-
0645-02, to make internal adjustments without inserting
the PG 501 into the Power Module . However, it is
not
mandatory for this procedure .
Preliminary Considerations
3 . If the plug-in extension is not used,
remove
the Power
Read the Operating Considerations in Section 1 before

Module cabinet
cover
to gain access to
the PG
501 internal
adjusting the PG 501 .

adjustments .
This
instrument should be adjusted
at an
ambient

4 . Apply power to
the PG
501 by
pulling out on the
temperature between +20 ° C and +30 ° C
(+68
° F and +86 ° F)

Power
Module
PWR button .
for optimum
performance
.
5 . Refer to the Controls and Adjustments foldout page
in this section for internal adjustment procedures .
NOTE
Normally, the
+
and - Output Compensation capacitors
(C143 and C183) will not require adjustment . However, if

if a ma/function is detected during
adjustment, refer
output amplifier transistors 0140 or 0180 are replaced, or

to system maintenance in the Power Module instruc-
if it is suspected that aberrations are excessive, C143 and

Lion manual for troubleshooting techniques, parts
C183 should
be
adjusted as
described in the adjustment

removal and replacement procedures, parts ordering
procedure .

information, etc .
REV . B, MAY, 1977

,

REPLACEABLE
ELECTRICAL
PARTS
PARTS ORDERING
INFORMATION
Replacement parts are available from or through your
IocaITektronix, Inc . Field Office
or representative
.
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, instrument
type or number, 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, Inc . Field Office or representative will contact you concerning
any change in part
number .
Change information, if any, is located at the
rear
of
this manual .
SPECIAL NOTES AND SYMBOLS
X000

Part first added at this serial number
OOX

Part removed after this serial number
ITEM NAME
In the Parts List, an Item Name is separated
from the description by a colon ( :) .
Because of space limitations, an Item Name
may
sometimes
appear as incomplete . For
further Item Name
identification, the
U .S
. Federal Cataloging Handbook H6-1 can be
utilized
where possible .
ABBREVIATIONS
ACTR ACTUATOR

PLSTC PLASTIC
ASSY ASSEMBLY

QTZ
QUARTZ
CAP
CAPACITOR

RECP RECEPTACLE
CER
CERAMIC

RES RESISTOR
CKT

CIRCUIT

RF

RADIO FREQUENCY
COMP COMPOSITION

SEL SELECTED
CONN CONNECTOR

SEMICOND SEMICONDUCTOR
ELCTLT ELECTROLYTIC

SENS SENSITIVE
ELEC ELECTRICAL

VAR VARIABLE
INLAND INCANDESCENT

WW

WIREWOUND
LED

LIGHT EMITTING DIODE

XFMR

TRANSFORMER
NONWIR

NON WIREWOUND

XTAL

CRYSTAL

Replaceable Electrical Parts-PG 501
Mfr . Code

Manufacturer

Address

City, State, Zip
00853

SANGAMO
ELECTRIC CO ., S . CAROLINA DIV .

P 0 BOX 128

PICKENS, SC 29671
01121

ALLEN-BRADLEY COMPANY

1201
2ND STREET SOUTH

MILWAUKEE, WI 53204
07910

TELEDYNE SEMICONDUCTOR

17 .515
CHADRON AVE .

HAWTHORNE, CA 90250
08806

GENERALELECTRIC CO ., MINIATURE
LAMP PRODUCTSDEPARTMENT

NELA PARK

CLEVELAND, OH 44112
11237

CTS KEENE, INC .

3230 RIVERSIDE AVE .

PASO ROBLES, CA 93446
13511

AMPHENOL CARDRE DIV .,
BUNKER RAMOCORP .

LOS GATOS, CA 95030
14752

ELECTRO CUBE
INC
.

1710 S . DEL MAR AVE .

SAN GABRIEL, CA 91776
56289

SPRAGUEELECTRIC
CO .

NORTH ADAMS, MA 01247
71450

CTS CORP .

1142 W . BEARDSLEY
AVE .

ELKHART, IN 46514
72982

ERIE
TECHNOLOGICAL PRODUCTS, INC .

644
W .
12TH ST
.

ERIE, PA 16512
75042

TRW ELECTRONIC COMPONENTS, IRC FIXED
RESISTORS,
PHILADELPHIA DIVISION

401
N . BROAD ST .

PHILADELPHIA, PA 19108
79727

C-W INDUSTRIES

550
DAVISVILLE RD .,P 0 BOX
96

WARMINISTER, PA 18974
80009

TEKTRONIX,INC .

P 0 BOX
500

BEAVERTON, OR 97077
90201

MALLORY CAPACITOR CO ., DIV . OF
P . R . MALLORY AND CO ., INC .

3029
E WASHINGTON STREET
P 0 BOX 372

INDIANAPOLIS, IN 46206
91637

DALE ELECTRONICS, INC .

P . 0 . BOX 609

COLUMBUS, NE 68601
3-4
CROSS INDEX-MFR . CODE NUMBER TO MANUFACTURER
1
"
1
1
1
1
1
1
1
1
" 1
1
1
1
1
1
1
NEV . F . NOV .
1978

Replaceable Electrical Parts-PG 501
Tektronix

Serial/Model No
Mfr
Ckt No .

Part No .

Eff

Dscont

Name
&
Description

Code

Mfr Part Number
A1

b70-2104-00

80101008082517

CKT BOARD ASSY :MAIN

80009
670-2104-00
A1

670-2104-Oi

80825188082527

CKT BOARD ASSY :MAIN

80009 670-2104-01
A1

670-2104-02

80825288084889

CKT BOARD ASSY :MAIN

80009 670-2104-02
C15 281-0579-00

CAP .,FXD,CER
DI :2IPF,SX,500V

72982 301-05000G0210J
C20

283-0081-00

CAP .,FXD,CER
DI
:O
.lUF,+80-20X,25V

56289 36C600
'

C28

281-0579-00

CAP .,FXD,CER DI :21PF,5%,500V

72982 301-05000G0210J
C29

283-0642-00

CAP .,FXD,MICA D :33PF,+/-0 .5PF,300V

00853 D10-3E33000
C30

283-0594-00

CAP.,FXD,MICA D :O .OOIUF,IX,IOOV

00853 D151F102F0
C31

285-1049-00 80101008039999 CAP .,FXD,PLSTC :O .OIUF,1%,200V

14752 230B1C103F
C31

285-0596-00 8040000

CAP .,FXD,PLSTC :O .OlUF,l%,100V

14752
410B1B103F
C32

285-1050-00

CAP .,FXD,PLSTC :O .IUF,1X,200V

14752 230B1C104F
C33

285-1051-00

CAP .,FXD,PLSTC :lUF,l%,200V

14752 230BIC105F
C34

285-1052-00

CAP .,FXD,PLSTC :l0UF,1%,100V

14752 230BIB106F
C35

290-0531-00

CAP .,FXD,ELCTLT :l00UF,20%,IOV

90201 TDC107MOlOWLC
C36

290-0531-00

CAP .,FXD,ELCTLT :l00UF,20%,IOV

90201 TDC107MOlOWLC
C37

290-0531-00

CAP .,FXD,ELCTLT :l00UF,20X,lOV

90201 TDC107MOlOWLC
C38

290-0531-00

CAP .,FXD,ELCTLT :l00UF,20X,lOV

90201 TDC107MOlOWLC
C39

283-0647-00

8010100 8059999

CAP .,FXD,MICA D :70PF,1%,100V

00853 D151E700F0
C39

283-0634-00

80600008079999

CAP .,FXD,MICA D :65PF,1%,100V

00853 D151E650F0
C39

283-0647-00

8080000

CAP .,FXD,MICA D :70PF,1%,100V

00853 D151E700F0
C42

283-0663-00

CAP .,FXD,MICA D :16 .8PF,+/-0 .5PF,SOOV

00853
D155C16 .8D0
C48

283-0081-00

CAP .,FXD,CER DI :O .lUF,+80-20X,25V

56289 36C600
C52

283-0002-00

CAP .,FXD,CER DI :O .OlUF,+80-20%,500V

72982 811-546E103Z
C64

283-0081-00

CAP .,FXD,CER DI :O .IUF,+80-20X,25V

56289 36C600
C67

281-0579-00

CAP .,FXD,CER
DI :21PF,5X,500V

72982 301-05000G0210J
C81

283-0111-00

CAP .,FXD,CER DI :O .IUF,20%,50V

72982
8121-N088ZSU104M
C82

283-O11t-00

CAP .,FXD,CER DI :O .lUF,20%,50V

72982 8121-N088ZSU104M
C87

281-0593-00 X8050000

CAP .,FXD,CER DI :3 .9PF,lOX,500V

72982
301-OOOCOJ0399C
C98

283-O11L-00

CAP .,FXD,CER DI :O .lUF,20%,50V

72982 8121-N088ZSU104M
C110

283-OO81-00

CAP .,FXD,CER DI :O .lUF,+80-20X,25V

56289
36C600
C120

283-0002-00

CAP .,FXD,CER DI :O .OlUF,+80-20%,500V

72982 811-546E103Z
C130

283-OOSL-00

CAP .,FXD,CER
DI :O .lUF,+80-20%,25V

56289 36C600
C132

283-0081-00

8010100B010135X CAP .,FXD,CER
DI :O .IUF,+gO-20X,25V

56289 36C600
C142

290-0536-00 X8082518

CAP .,FXD,ELCTLT :l0UF,20%,25V

90201
TDC106M025FL
C143

281-0167-00

CAP .,VAR,CER DI :9-45PF,200V

72982
538-011-D
9-45
C148

283-0002-00

CAP .,FXD,CER DI :O .OIUF,+80-20%,500V

72982 811-546E1032
C149

283-0002-00

CAP .,FXD,CER DI :O .OIUF,+80-20%,500V

72982 811-546E103Z
C150

283-0081-00

CAP .,FXD,CER DI :O .IUF,+80-20X,25V

56289 36C600
C160

283-0002-00

CAP .,FXD,CER DI :O
.OIUF,+80-20%,SOOV

72982 811-546E103Z
C170

283-0081-00

CAP .,FXD,CER DI :O .lUF,+gO-20X,25V

56289 36C600
C172

283-0081-00

8010100B010135X
CAP .,FXD,CER DI :O .IUF,+80-20X,25V

56289 36C600
C174

281-0627-00 X8084890

CAP .,FXD,CER DI :1PF,+/-0 .25PF,500V

72982 301-OOOCOK0109C
C182 290-0536-00 X8082518

CAP .,FXD,ELCTLT :l0UF,20X,25V

90201
TDC106M025FL
'

C183

281-0161-00

CAP .,VAR,CER DI :9-45PF,200V

72982 538-011-D 9-45
C184

281-0509-00 X8084890

CAP .,FXD,CER DI :15PF,+/-1 .5PF,500V

72982 301-OOOCOGO150K
C188

283-0002-00

CAP .,FXD,CER DI :O .OlUF,+80-20%,SOOV

72982 811-546E103Z
C189

283-0002-00

CAP
.,FXD,CER DI :O .OIUF,+80-20X,500V

72982 811-546EL03Z
C216

283-0000-00

CAP .,FXD,CER DI :O .OOlUF,+100-0X,500V

72982 831-516EL02P
'

C224 290-0527-00

CAP .,FXD,ELCTLT :I5UF,20X,20V

90201
TDC156M020FL
C226 290-0519-00

CAP
.,FXD,ELCTLT :l00UF,20%,20V

90201 TDC107M020WLD
C228

283-0081-00

CAP .,FXD,CER DI :O .lUF,+80-20%,25V

56289 36C600
C240

283-0000-00

CAP .,FXD,CER DI :O .OOIUF,+100-0%,500V

72982 831-516E102P
'

REV .
F NOV . 1978
' A1 670-2104-03 8084890 CKT BOARD ASSY :MAIN
80009 670-2104-03
3-5

Replaceable
Electrical Parts-PG 501
Tektronix

Serial/Model No .

Mfr
Ckt No .

Part No .

Eff

Dscont

Name
&
Description

Code

Mfr Part Number

,
C254 290-0527-00

CAP .,FXD,ELCTLT :I5UF,20~,20V

90201 TDC156M020FL
C256 290-0519-00

CAP
.,FXD,ELCTLT :l00UF,20~,20V

90201 TDC107M020WLD
C258

283-0081-00

CAP .,FXD,CER DI :O .IUF,+80-20I,25V

56289 36C600
C260

283-0002-00

CAP .,FXD,CER DI :O .OlUF,+80-20~,500V

72982 811-546E103Z
C261 290-0531-00

CAP .,FXD,ELCTLT :l00UF,20~,1OV

90201
TDC107MOlOWLC
CR15

152-0141-02

SEMICOND DEVICE:SILICON,30V,150MA

80009 152-0141-02
CR17

152-0141-02

SEMICOND DEVICE:SILICON,30V,150MA

80009 152-0141-02
CR20

152-0141-02

SEMICOND DEVICE
:SILICON,30V,150MA

80009 152-0141-02
CR65

152-0141-02

SEMICOND DEVICE:SILICON,30V,150MA

80009 152-0141-02
CR69

152-0141-02

SEMICOND
DEVICE:SILICON,30V,150MA

80009 152-0141-02
CR79

152-0141-02

SEMICOND DEVICE:SILICON,30V,150MA

80009 152-0141-02
CR80

152-0153-00

SEMICOND DEVICE:SILICON,15V,50MA

80009 152-0153-00
CR141

152-0333-00

SEMICOND DEVICE:SILICON,55V,200MA

80009 152-0333-00
CR181

152-0333-00

SEMICOND DEVICE
:SILICON,55V,200MA

80009 152-0333-00
CR212

152-0141-02

SEMICOND DEVICE
:SILICON,30V,150MA

80009 152-0141-02
CR221

152-0141-02

SEMICOND DEVICE:SILICON,30V,150MA

80009 152-0141-02
CR222

152-0141-02

SEMICOND DEVICE:SILICON,30V,150MA

80009 152-0141-02
CR224

152-0066-00

SEMICOND DEVICE :SILICON,400V,750MA

80009 152-0066-00
CR240

152-0141-02

SEMICOND DEVICE:SILICON,30V,150MA

80009 152-0141-02
CR250

152-0141-02

SEMICOND DEVICE:SILICON,30V,150MA

80009 152-0141-02
CR254

152-0066-00

SEMICOND DEVICE :SILICON,400V,750MA

80009 152-0066-00
DS250 150-0048-00

LAMP,INCAND :5V,60MA

08806 683
J10

131-0955-00

CONNECTOR,RCPT, :BNC,FEMALE,W/HARDWARE

13511 31-279
J50

131-0955-00

CONNECTOR,RCPT, :BNC,FEMALE,W/HARDWARE

13511 31-279
J140 131-0955-00

CONNECTOR,RCPT, :BNC,FEMALE,W/HARDWARE

13511 31-279
J180 131-0955-00

CONNECTOR,RCPT, :BNC,FEMALE,W/HARDWARE

13511 31-279
L132 108-0409-00

COIL,RF :I7 .SUH

80009
108-0409-00
L136
108-0436-00

COIL,RF :FIXED,240NH

80009 108-0436-00
L172
108-0409-00

COIL,RF :I7 .SUH

80009 108-0409-00
L176 108-0436-00

COIL,RF :FIXED,240NH

80009 108-0436-00
Q40

151-0424-00

TRANSISTOR :SILICON,NPN

80009 151-0424-00
Q42

151-0424-00

TRANSISTOR :SILICON,NPN

80009 151-0424-00
Q50

151-0221-00

TRANSISTOR
:SILICON,PNP

80009
151-0221-00
Q52

151-0221-00

TRANSISTOR :SILICON,PNP

80009 151-0221-00
Q70

151-0220-00 BO10100
B059999 TRANSISTOR :SILICON,PNP

80009 151-0220-00
Q70
151-0410-00 8060000

TRANSISTOR :SILICON,PNP
Q80
151-0424-00

TRANSISTOR :SILICON,NPN
Q82
151-0190-O1

TRANSISTOR :SILICON,NPN
Q110 151-0424-00

TRANSISTOR :SLLICON,NPN
Q115 151-0424-00

TRANSISTOR :SILICON,NPN
Q120 151-0221-00

TRANSISTOR :SILICON,PNP
Q124 151-0221-00

TRANSISTOR :SILICON,PNP
Q130 151-0221-00

TRANSISTOR :SILICON,PNP
0136 151-0221-00

TRANSLSTOR :SILICON,PNP
Q140 151-0411-00 B010100B082527 TRANSISTOR
:5ILICON,NPN
0140 151-0451-00 B082528

TRANSISTOR :SILICON,NPN
Q150 151-0221-00

TRANSISTOR :SILICON,PNP
Q155 151-0221-00

TRANSISTOR :SILLCON,PNP
Q160 151-0424-00

TRANSLSTOR :SILICON,NPN
0154 151-0424-00

TRANSISTOR
:SILICON,NPN
0170 151-0424-00
80101008084889 'rRANSISTOR
:SILICON,NPN
3-6
80009 151-0410-00
80009 151-0424-00
80009 151-0190-O1
80009 151-0424-00
80009 151-0424-00
80009 151-0221-00
80009 151-0221-00
80009 151-0221-00
80009 151-0221-00
80009 151-0411-00
80009 151-0451-00
80009 151-0221-00
80009 151-0221-00
80009 151-0424-00
80009 151-0424-00
80009 151-0424-00
1tEV . F
N~~V . 1978

Tektronix

SeriaIlModel No .

Mfr
Ckt No .

Part No .

Eff

Dscont

Name & Description

Code

Mfr Part Number
Q170

153=0624=00

B084890

SEMICOND DVC SE
:SILICON,NPN,MATCHED PAI R

80009 153-0624-00
Q170

* FURNISHED
AS A MATCHED PAIRWITH Q176
Q176 151-0424-00 BO10100B084889 TRANSISTOR
:SILICON,NPN

80009
151-0424-00
Q176

153-0624-00

B084890

SEMICOND DVC SE :SILICON,NPN,MATCHED
PAIR

80009 153-0624-00
Q176

----- -----

*
FURNISHED AS A MATCHED PAIRWITH Q170
Q180
151-0285-00
BO10100B069999 TRANSISTOR
:SILICON,PNP

80009 151-0285-00
Q180

151-0450-00

B070000

TRANSISTOR :SILICON,PNP,SEL FROM 2N5583

80009 151-0450-00
Q210 151-0190-01

TRANSISTOR :SILICON,NPN

80009
151-0190-O1
Q216 151-0134-00

TRANSISTOR :SILICON,PNP

80009
151-0134-00
Q220 151-0190-01

TRANSISTOR :SILICON,NPN

80009 151-0190-01
Q240
151-0188-00

TRANSISTOR
:SILICON,PNP

80009 151-0188-00
Q246 151-0103-00

TRANSISTOR
:SILICON,NPN

80009 151-0103-00
Q250
151-0188-00

TRANSISTOR :SILICON,PNP

80009
151-0188-00
R12

301-0510-00

RES .,FXD,CMPSN :51 OHM,S~,O .SOW

01121 EB5105
R14

321-0276-00

RES .,FXD,FILM :7 .32K OHM,1~,0
.125W

91637
MFF1816G73200F
R15

315-0331-00

RES .,FXD,CMPSN :330
OHM,5~,0 .25W

01121 CB3315
R17

315-0680-00

RES .,FXD,CMPSN :68 OHM,57,0
.25W

01121
CB6805
R20

321-0272-00

RES .,FXD,FILM :6 .65K OHM,1~,0 .125W

91637 MFF1816G66500F
R22

315-0101-00

RES .,FXD,CMPSN :100 OHM,5I,0 .25W

01121 CB1015
R23

311-1120-00

RES .,VAR,NONWIR :100 OHM,30I,0
.25W

71450
201-YA5531
R25

315-0221-00

RES .,FXD,CMPSN :220 OHM,SI,0
.25W

01121 CB2215
R26

315-0271-00

RES .,FXD,CMPSN :270 OHM,5~,0
.25W

01121 CB2715
R28

315-0332-00

RES
.,FXD,CMPSN :3 .3K OHM,5~,0 .25W

01121 CB3325
R29

315-0821-00

RES .,FXD,CMPSN :820 OHM,SZ,0 .25W

01121 CB8215
R30

315-0330-00

BO10100B049999

RES .,FXD,CMPSN :33 OHM,5~,0
.25W

01121 CB3305
R30

315-0390-00

B050000

RES .,FXD,CMPSN :39 OHM,57,0 .25W

01121 CB3905
_ R31

315-0620-DO

RES .,FXD,CMPSN :62
OHM,57,0 .25W

01121 CB6205
R32

307-0115-00

BO10100B010135X RES
.,FXD,CMPSN :7 .5 OHM,5~,0 .25W

01121 CB75G5
R32

307-0115-00 XB040000

RES .,FXD,CMPSN :7 .5 OHM,57,0 .25W

01121 CB75G5
R37

315-0271-00

RES .,FXD,CMPSN :270
OHM,57,0 .25W

01121 CB2715
R38

311-0963-00

RES .,VAR,WW :SK
OHM,107

11237 300SF-3P1686
R40

315-0101-00

RES .,FXD,CMPSN :100 OHM,5~,0 .25W

01121 CB1015
R41

301-0821-00

RES .,FXD,CMPSN :820 OHM,5Z,0 .50W

01121 EB8215
R42

315-0101-00

RES .,FXD,CMPSN :100 OHM S%,0 .25W

01121

CB1015
'

R44

315-0511-00

RES .,FXD,CMPSN :510 OHM,57,0
.25W

01121 CB5115
R45

315-0122-00

RES .,FXD,CMPSN :I .2K OHM,5~,0 .25W

01121 CB1225
R48

301-0561-00

RES .,FXD,CMPSN :560 OHM,57,O .SOW

01121 EB5615
R50

315-0271-00

RES .,FXD,CMPSN
:270 OHM,5~,0 .25W

01121 CB2715
R52

315-0122-00

RES .,FXD,CMPSN :I .2K OHM,5~,0 .25W

01121 CB1225
R54

316-0560-00

RES .,FXD,CMPSN :56 OHM,10~,0 .25W

01121 CB5601
R55

316-0270-00

BO10100B084379

RES .,FXD,CMPSN :27 OHM,107,0
.25W

01121
CB2701
R55

315-0270-00

B084380

RES .,FXD,CMPSN :27 OHM,57,0 .25W

01121
CB2705
R59 315-0510-00
RES .,FXD,CMPSN :51 OHM,5~,0
.25W

01121
CB5105
R60

301-0910-00

RES .,FXD,CMPSN :91 OHM,SI,O
.SOW

01121 EB9105
R62

301-0910-00

RES .,FXD,CMPSN :91
OHM,57,0 .50W

01121 EB9105
R64

301-0820-00

RES .,FXD,CMPSN
:82 OHM,57,O .SOW

01121 EB8205
R65

315-0151-00

RES .,FXD,CMPSN :150 OHM,5~,0 .25W

01121 CB1515
R67

315-0131-00

RES .,FXD,CMPSN :130 OHM,5~,0 .25W

01121 CB1315
R69

316-0471-00

RES .,FXD,CMPSN :470 OHM,10~,0
.25W

01121 CB4711
R71

316-0471-00

RES .,FXD,CMPSN :470 OHM,10~,0
.25W

01121
CB4711
R73

315-0101-00

RES .,FXD,CMPSN :100 OHM,5~,0 .25W

01121
CB1015
R75

315-0271-00

RES .,FXD,CMPSN
:270 OHM,5~,0 .25W

01121 CB2715
REV .
E NOV . IQ78
Replaceable
Electrical
Parts-PG 501
' R58 315-0330-00
RES
.,FXD,CMPSN :33 OHM S%,0 .25W
01121 CB3305
3-7