Tektronix 103A Instruction Manual

INSTRUCTION MANUAL

MODEL 103A

NANOVOLT AMPLIFIER

0 COPYRIGHT 1974 0 COPYRIGHT 1974

KEITHLEY INSTRUMENTS. KEITHLEY INSTRUMENTS.

20775 AURORA ROAD CLEVELAND. OHIO R413Y ,216, 24~~0400 20775 AURORA ROAD CLEVELAND. OHIO R413Y ,216, 24~~0400

TELEX~ 98~5469 TELEX~ 98~5469

PRlNTED IN “.SA. PRlNTED IN “.SA.

CAOLE KEITHLEY CAOLE KEITHLEY

I NC. I NC.

CONTENTS

ILLUSTRATIONS

Fig. NO.

1
2
3

4
5
6

7a
7b
8

9
10
11
12

13a
13b

14
15
16
17
18
19
20
21
22

23
24
25
26
27
28

29

30

31

32

33

34

Ti,tle

Front Panel, wadcl, 103*.
Front Panel Controls and Terininal~s.
Rear Panel - Models 103A and 1031*.

overall Block ILt@-am.
Single-Ended Mode.
Uifferenrinl Mode.

Power Rcceptncle.
Power Ilqmfi connection.
Johnson Noise/ Hz Versus Source Resistance.
cain/Phnse vs. Frequency for R-C Type Filter.
Equivalent circuit Far Noise Analysis.
use Of Model 1037 Transformer.
Noise Bandwidth.
Noise CoDtoUr Single-Ended Mode.
Noise Contour Oiiferential Mode.
use as an cmill.oscope Preamplifier.
"se in System 84 Lockin Amplifier.
Model 2000 Rack Mounring.
Model 100, Dual Kack Mounting.
Overall Block r1i.ap,ram.
Non-inverting Stage "A".
Non-inverting stage '93".
Single-ended Mode.
"ifferenfisl Mode.
Nan-inverting stage "I?".

Nan-inverting Stage “F”.

High-Law cut Filter.
DC Offset Adjustment.

t18" Power supply.
camponent Layout, K-293.
component Layout, PC-294 (Mother Board).
Component Layout, PC-295 (Model 1031A Power Supply).
Component l.uyout, PC-261 (Model 1031A Regulator).
Tese Set-q For Frequency Response Check.
Chassis Assembly, Exploded View.
Bottom cover Assembly.

,‘URC

1
3
3

4
4
4

5
5
6

9
10
10
11
11
12
12
13
14

16
16
16
17
17
17

17

18
18
19
19
20
21
22
24
29
29

SPECIFICATIONS

SPECIFICATIONS

0371

I<l3,‘?‘EIL.~-#

103A NANOVOLT AMPLIFIER

SECTION 1. GENERAL DESCRIPTION

l-l.

GENERAL. The Model 103A Nanovolt Amplifier is

an ac amplifier intended for use in high-gain low-

noise applications.

MODEL 103A AMPLIFIER

b. Adjustable frequency Sesponse. A combination of
high cut and low cut filter sections permit selection
of optimum irequency bandwidth.

C. Overload Indication.

An automaeic overload in­dication circuit detects overloads under various oper­ating conditions.

1-2. FEATURES.

d. High Output Level.

The full scale weput is ten

a. Selectable Input Mode. The input mode can be voles pk-to-pk (d-c coupled) to easily drive a recorder,

set far either single-ended or differential configura-

amplifier, or oscill~oscope without further amolification.

Front Panel Controls and Terminals

Control or Terminal

INPOT Switch (S201B)

A-B Input

-B Input

O"ERLO*o RESET Swiech (S201A)
3 dB FREO HZ Switch Sets overall amplifier frequency response.

HIGH Filter (S3"lA)

LOW Filter (S301B)

GAIN Switch CS302)

GAIN ADJUST Control (X306,

sets inpue “ode as follo”s:
“Ffferential Mode.
Single Ended Mode.

Activates overload reset circuitry.

Sets High Cue

sets LO" Cut
sets overall gain. in 20 dB steps.

Adjusts gain over 2” dS span.

Funceianal oescripekm

Paragraph

2-4, a
2-4, a

2-4, a
2-4, a

2-4, a
2-4, a

INPUT A cJ202~
INPUT B (5201~
HIGH "UT (53011
LOW "UT (53021

“vERL”A” Lamp toslol~

Control or Terminal

POWER INPUT (P301)

DC OUTPUT ADJ.

Control ii1 (R312)

Control 112 (R311)

2

Non-inverting

Inverting Input receptacle.

Input receptacle.

High output receptacle.

LOW output

receptacle.

Indicates overload condition.

Resr Panel Controla and Terminals

TABLE l-2.

Functional OescriptFon

Input receptacle for 518” power.

Adjusts dc oueput offsets.

2-2, a

2-2, a
2-2, b
2-2, b
2-5,

Paragraph

2-2, c

2-5, i

d

0371

INPUT MODE SELECTION

r

A-8 -J ""CRI."*D

INPIJC INPUT
5201

5201

%T

GENERAL DESCRIPTION

GAIN

ADJtJST SWiLCh

R306 s302

GAIN

INPUT

A

INPUT

""EilLOA"

B

FIGURE 2. Front Panel Controls and Terminals.

Lamp

LOW

FRCQ

HIGH
FREQ

5301 J-301
L."W
0 ,rr

IIICI,
"LT

"272

FIGURE 3. Rear Panel - Models 103A and 103ln

3

OPERATION

MODEL 103A AMPLIFIER

SECTION 2.

2-1. THEORY OF "PEKATION.

a. General. The Model 10311 Nanovolt hmplifier is

a high gain voltage amplifier designed for use with

single ended or differential inputs. 'The amplifier is

essentially composed of two high impedance inpue am-

plifiers, a summing amplifier, a combination high-l.ow

c,,t filter section, two stages of X10 gain, and an

output buffer amplifier as she"" in Figure 4.

b. Single-Ended Mode (-B INPUT). In this mode the

input amplifiers are connected together to form a
single-ended inverting amplifier as shown in Figure 5.
The signal at INPUT H will be amplified and inverted.
The signal at INPLTI A is not connected. Amplifiers

"A" and "s" are summed co provide very low noise char­acteristics.

Differential Mode (A-B INPUT). In this mode the

C.

input amplifiers are conneceed as separate amplifiers
which are summed differentially as shown in Figure 6.
The oueput is a funceion of A-B times the gain of the

amplifier.

OPERATION

2-2. C”NNIICTI”NS.

Input. 'I‘he

a.
designated "INPUT A" and "INPUT il". 'These receptacles
(5201 and 5202) at-2 BNC types which mate with coaxial
cables such as Keithlcy Models 8201 and 8202 coaxial
cables. 'he inner coneact of each receptacle is the
circuit high. The outer shell ia the circuit low

which is floati,"g wit,, respect co the Model l"3h chas-

sis. Only INPUT B should be used for single-ended
input operation. For differential operation both in­puts should be used.

modes is given in Section 2-5.

b. output.

cles designated "LOW "UT" and "HIGH "UT". These re-

ceptacles (5301 and 5302) are BNC types which mate

with coaxial cables such as Keithley Models 8201 and

8202

coaxial cables. The inner ConfaCt of "LOW am@'"
receptacle is at ci.rcuit low (the same as the outer
shell of INPUT A and INPUT B). The inner contact of
"HIGIl OUT" is the amplified output. me outer shell
of each ""UT" connectc,r is at chassis ground. There

Model 103A has two input receptacles

A complete discussion of input

the b,odel 103A has two oueput recepce-

INPUT6

INPUTA

“A”

FIGURE 4.

Overall Block Diagram.

FIGURE 6. Diffcrcntial Mode

4

“371

CHASSIS

INPUT E

+1t3v 8 D -18V

@

c

P301

LOW

INPUT A

,,.

,,,~;

;..,,

OPERATION

2.

Flicker noise (l/f). 'this noise has a char­acteristic of constant energy per percent bandwidth.
Random noise such as generated by tubes and trans-

istors shows a low frequency characteristic or l/f

relafionship.

3. oiscrete Frequency Noise. This is noise gen-

erated by various discrete frequency sources such
as power lines, radio frequency generators, etc.

b. Shielding.

1. Electric Fields.

Shielding is usually neces­sary when the instrument is in the presence of very
large ac fields or when very sensitive measurements

are being made. The shields of the measurement cir­cuit and leads should be connected together to ground

at only one point.

This provides a "tree" configura-

tion, which minimizes ground loops.

2. Magnetic Fields. Magnetic shielding is useful

where very large magnetic fields are present. Shield-

ing, which is available in the form of plates, foil
or cables, can be used to shield the measuring cir-

cuit, the lead wires, or the instrument itself.

c. Grounding. The Model 103A has been designed to
operate with either the Model 1031A Power Supply or

the Model 840 Amplifier. The circuit low is isolated
from chassis ground by a 10 ohm resisror in the power
supply. For best results, no other connection should

be made between circuit low and chassis ground. Since

the yodel 103.4

chassis is connected to earth ground
through the accessory power cable, it is not necessary
to connect the Model 10% chassis to ground.

when the

yodel 103~ is connected to the yodel 840 differential

inouc (as shown in FFrwre 15). the m!xR of the Model
840 minimizes the effects of ground loops.

a. Front Panel.

1. INPUT Switches (52018). These switches are
pushbutton types wit,, two "orma configurations. The
switch posi~i.ons are designated as "A-B" and "-U".
'These two pushbuttons are interlocked so that depress­ing one will release the Other automatically. H0C.T"~~

it is

possible

to depress both or have

both buttons
released but these conditions are not useable modes
Of operation.

2. O"EKLOA,l RESET Switch (S2Olh). This switch is
a momentary contact pushbutton type. The overload
reset circuit is activared only when the pushbutton
is depressed. When the OVERLOA" lndicaeor light goes
off the reset has been accomplished.

3dn FKEQ Hz (5301).

3.

concenrric type.

filter in ten positions from 10 11% co 300 k"Z.

'l'he inner dial sets the "IlIGil Cut"

This switch is a dual-

me

outer dial sets the "LOW Cut" filter in nine posi-

tions from 0.1 to 10 kllz.

4. GAIN.

Gain is set by use of a dual-concentric
GAIN switch 5302 and GAIN ADJUST control R306. The
GAIN hD.JUST control has a "CAL" position when set

to fully clockwise.

b. Rear Panel.

1. DC OUTPUT AOJ "1" (R312).

These controls adjust
the dc output offset.

6

FIGURE 9. Gain/Phase Vs. Frequency For R-C Type Filter.

0371

0371

7

MODEL 103A AMPLIFIER

Gain settings of Model l”3A

TABLE 2-3.

CAIN switch GAIN AD.J”ST

Overall Gain

setting setting (C) Possible

Of the IIICII-LOW cut filter which may not cause an
overload at the ourpuc. since a &refilter oVerload
may occur due t" large amplirude noise signals, the
overload is sensed and the OVERLOAD indicator is
lighted whenever an overload condition is present.

However, prefilter overloads above 100 km may not
be detected.

the output stages due tc’ saturation.

put will saturate when drive" beyond 10 volts &peak-

d. Overloads. Although clle Model 103A aaplifier is
ac coupled to the input, rtle amplifier has been designed
to have a very low frequency response. Therefore the

internal circuits have very long time constants. me
long time COnSrantS affect the operation of the Model

103A under input overloads and power turn-on

Three types of overloads must be considered in this

discussion.

conditions.

ra-peak, the OVERLOAD indicaror will be lighted as
long as t,,i.s canditian cxiscs.

lOad condition, the GAIN setting can be reduced, the
input signal can be attenuated, or fil~Lered through
the use of the HIGH-LOW cut filters. The O"CRI.oAD

K1:SF.T button can be used t0 restablish normal bias

conditions in the amplifier.

Calibrated

(Yes or NO)

wefilter ""erloads. Overloads can occur ahead

2.

3. Steady-state Overloads.

Overloads can occur in

Since the WC-

TO remove ibe "Ye=-

0371

“opt =

Eq. 6a

MODEL1037

Thus the equivalent noise bandwidth is given in equa­tion 10.

10

OPERATION

0371

APPLICATIONS

MODEL 1038 AMPLIFIER

SECTION 3.

3-1.

GENERAL. AlthouSh the Model 103A can be used as

El general purpose insfrument, a few specific applica-

tions Can more fully illustrate the important features.

3-2.

TYPICAL APPLICATIONS.

a. Oscilloscope Preamplifier. men used as a pre­amplifier for a dull input oscilloscope the Model 103A
CB” be connected as shown in Figure 14.
scope chassis should be conneceed to earth ground di­rectly. The Model 10%. out,,uts can be connect differ-

entially or single-ended if necessary.

ing the Model 103A output to a single input oscillo­scope, the NIGH OUT receptacle should be used.
the Model 103A low is isolated by 10 ohms above chassis

ground when powered by the Model 1031A, no other con­nection is required. If another power supply is used
such as batteries, it is necessary to connect a 10 ohm
resistor between low and chassis.

b. Lock-in.System Preamplifier. When used with a
phase-sensitive detector such as the Keithley Model
840 the Model 103A can be connected as shown in Figure

15. In this application the Model 103A outputs mate
with the differential input of the Model 840 thereby

minimizing ehc effects of ground loop connections.

this application

input “ode.

pr.ovides law and ground as well as +I8 volts, it is
not necessary to connect the Model 103A chassis to
earth Sround.

the Model 840 should be set for “01~~”

Since the Model 840 accessory power outpx,t

me oscillo-

men c”nnect-

Si”CC

For

APPLICATIONS

F10Lnuz 14.

FIGURE 15. “se in System 84 Lockin Amplifier.

Use as an Oscilloscope Preamplifier.

OSCILLOSCOPE

POWER GND

MODEL 10% AMPLIFIER

ACCESSORIES

SECTION 4. ACCESSORIES

The

GENERAL.

4-l.

be used with the Model 103h to provide additional con­venience and versatility.

the Model 2000 is a rack mounting kit which converts
any half-rack, Style M instrument irom bench mounting

to rack mounting in a standard 19-inch rsck. The

dimensions are 3-l/2” high x 19” wide. The hardware

included in this kit consists of B blank panel which

can be mounted on either side of a half-rack instru­rent.

following

Keithlcy

accessories

Model 2000 Rack Mounting Kit

can L-2. OPNATING INSTKUCTIONS.

Manual is supplied with each accessory giving c~mpluie

A sepvracc 1nser,,ctio,,

operating information.

FIGURE 16. Model 2000 rack pouncing

Models 8201, 8202 Coaxial Cables

Description:
These cables are coaxial types with BNC ConneCtorS an

each end. The wade1 8201 cable is 10 inches long

while the Model 8202 is 20 inches.

Application:

These cablc2s mate with the RNC receptacles On the
Models 103A and 840.

..,,..,

.,

,,~

~,

,~,

,,,,

.~.

.,.

,,,,.

ACCESSORIES

MODEL 103.4 AMPLIFIER

Description:

The Model 1007 is dual rack mounting kit with over­all dimensions 3-l/2” high and 19” wide. The hard-

ware included in this kit consists of two Angle

Brackets, one Mounting clamp, and extra mounting

screws.

Application:

The Model 1007 converts any half-rack, style M instru-

ment from bench mounting to rack mounting in a stand­ard 19-inch rack.

Installation:

a. Before assembling the rack kit, determine the
position of each instrument. Since the instruments
can be mounted in either location, their position
should be determi”ed by the user’s measurement. The

following instructions refer to instruments “A”

and “B” positioned as shown in Figure 17.

b. Once the position of each instrumenr has been

determined, the “side dress” panels (Item 11) on
adjacent sides should be removed. Removal is *ccom­plished by loosening the socket head screws (Item 24)

in two places.

Slide the “side dress” panels to the

rear of the instrument to remove.

c. The “mouneing clamp” (Item 23) is installed on
instrument “A” using the original hardware (Item 24).
With the socket heed screws removed, insert Lhe “mount­ing clamp” behind the “corner bracket” (Item 7) and
replace the screwy to hold the mounting clamp in place.

Parts List:

Item
NO.

Description

21 Angle Bracket
22 Screw, #6-32x5/8, Phillips
23 Mounting Clamp
24 Screw, #6-32x1./2, FH Socket

WY
Req’d Pare No.

2
4
1
4

Keithley

24783h

24798B

(original hardware)
25 Screw, #6-32x1x1/8, Phillips
26 Kep Nut, #6-32

1
1

d. Tighten the socket head screw (Item 24) on

instrument “B”.

Insert the “mounting clamp” behind

the “corner bracket” on i”str”ment “B” as show”.

e. When mounting instruments having the same depth,

a screw (Item 25) and kep “UC (Item 26) are required
to secure the Tao instruments together.

f. Attach an “angle bracket” (Item 21) o” each

instrument using hardware (Item 22) in place of the
original hardware (Item 24).

g. The bottom cover feet and tilt bail assemblies

may be removed if necessary.

h. The original hardware, side dress panels, feet
and tilt bail assemblies should be retained for future
conversion back to bench mounting.

FIGURE 17. Model 1007 Dual Rack Mounting.

SECTION 5.

CIRCUIT DESCRIPTION

The overload and fil,ter circuits are located 0” the

"Overload Board", PC-293.

COMMON

MODE

OVERLOAD

PREFILTER
OVERLOAD

INPUT4

Fotentiometer R244 adjusts bias current through resis
tars K213 and R214.

OUTPUT

OVERLOAD

0371

stage “C”.

C.

graced circuit QAZOlA and various gain set resistors

which are connected for either single-ended or differ-

ential mode.

1. Single-Ended Mode.
“A” and “B” are connected as sunming i,,,,,uts to
amplifier “C” as shown in Figure 21.
amplifier “C” is deLermined by resistors K247, R248,
and R249 as foll~ows:

This amplifier is composed of inte-

liar this made mplifiers

The gain of

R248

I

FIGrn 21.

d. Stape ‘9”. This amplifier stage is a unity-gain

buffer amplifier composed of Qh301. Thi., amplifier is

a self-contained voltage follower integrated circuit
package.

Stage “E”. This amplifi~cr stage is composed of

e.

integrated circuit QA302.A connected as a non-inverting

amplifier as shown in Figure 23. Gain is sef by re-

sistors R308 and K313, where:

Single-ended Mode.

I

fL (3 dill = I

2T!RC = c

10

where c = value in UT.

HIGH CUT FILTER

LOW CUT FILTER

r-----l m

c313

T"

+ R311 -

v

a. blather Hoard.
provided by separate transformer windings and bridge
rectifiers as shown on schematic 24.8080.

Power for the 5’8” supplies is

18

L

1~‘~

~.~

~.~

..,,,.,..

,,~

.,

~,~

COMPONENT LAYOUTS

;; j

t

1;

MODEL 103A AMPLIFIER

20

FIGURE 29. Component Layout, PC-294 (Mother Board)

0371

COMPONENT LAYOUTS MODEL

103A

AMPLIFIER

6

A J201

T 201

FIGURE 30.

Component Layout, PC-295 (Model 1031A l'owcr Supply)

21

j’

,.~

~,

,~~

,.

COMPONENT LAYOUTS

MODEL 103A AMPLIFIER

FIGURE 31. Component Layout,

PC-261 (Model 1031A Regulator)

0371

CALIBRATION

SECTION 6.

REQUIRE” TEST Eq”IPMI(N1‘. Test equipment need-

6-2.
ed for calibrating rhc M”del~ 103A is described in

Table 6-l.

AD.J"STMENT AND CALIlw.ATION FROCED"RE.

6-3.

procedure should be used whenever ie is necessary to

calibrate the Model 103.4 to emure chat it meets

published specifications.

This

CALIBRATION

Initial Turn ON.

a.

1. Place shorting caps on both INPUT A and "

and set INPUT switch (5201) to A-".

2. set both the LOW FRZQ. and IIICH PKI:Q. SWiLCh

(S301) to the 1K position and set the GUN t:o 100

and the ADJUST pot (R306) full CW (CAL).

3. connect the power cable from one of the *ea*
pane1 outputs Of the Model 103111 (ItaIl I) to the
POWER INPUT cOnneCtor (P301) on the rear pane1 of

the Model 1031\ and turn the Model 1031A on.

4. hfter about 5 to 10 seconds, the O"ERLOnU
Lam iDS101) should be liehted and after iibout 1

b. Bias Adjustment.

1. Set the Model 10% INFUT to A-ii and connect

the DC Voltmeter (item B) between TF-201~ and 'TX'-203.

DC Voltmeter must be floating.

0874

23

MODEL 103A

3. Adjust the 300kHZ trlmlller capacitor (C311)
far 1.4 volts peak-to-peak at the Mode1 103A OUT­PUT (-3dR).

6-4. CUECK-OUT PKOCl?D"RE.

a. Gain Check.

1. ConneCt Potentiometer (Item II) to the Signal
Generator output, connect the Potentiometer output
to the input of the AC Ratio Standard. "sing the
Signal Generator variable-attenuator and the Paten-

tiometer (Item It), set the signal at the AC Ratio
Standard input for loom" t lOOIl" RMS at 100 HZ as
monitored on the AC Voltmeter.

2. Connect the output of the AC Ratio Standard
to the -B INPUT of the 1o3A and set the 1o3A con­rro1s as follo"s:

LO cut - 0.1 NZ
Hi Cut - 300/.&

Gain - 100

3.

Connect the OUTPUT of the Mode1 103A f~ the
input of the AC "oltmeter and set the AC Voltmeter
Controls as follows:

Flange Full. Scale - 5 Volts
Null Full Scale - loom"
Function - AC
Dials - 1.0000

4.

see the AC Ratio standard dials as follows:

10-l 10-2 10-3

1 0 0 0 0

The AC "oltmeter should read 1.0000 volts ? 101""
KMS.

10-4 10-5 10-6 10-7

0 0

5. set the AC Ratio standard dials as follows:
lo-1 10-2 lo-3 10-4 lo-5 10-6 10-7

0

1 0 0

and eet the 103A gain to 1k.

6. The AC "oltmerer should rend 1.0000 vole i

lh" KM.

7. Set the AC Ratio Standard dials as follars:
10-l m2 10-3 IO-~ 10-5 10-6 10-7

0

0 1

and set the 103A gain to 10k.

8. The AC Voltmeter should read 1.0000 volt *

lOIn" RMS.

9. Turn the Mode1 103A GAIN ADJUST (~006) full

ax.

The AC Voltmeter shauld now read less than

loom".

b. Frequency Response.

1. Connect the Signal Generator CO the 20 dB pads

and 50 ohm termination as shown in Figure 35 and set

the Signal Generator for 35,"" t 35011" at the 50 ohm
termination as monitored on the AC Voltmeter.

2. Set the Sijyal Generator frrquency to ISkHz,

the 103A GAIN to 100 and connect the test set UD as

shown in Figure 35.

3.

set the hC "oltmeeer conrro1s as follows:

Range Full Scale - 5 volts
Null Full Scale - loom"
Polarity
Dials

AC

- 3.5000

0 0 0

0 0 0 0

TEE

CONNECTOR

r--,

SIGNAL

GENERATOR _

24 0874

20 08

PAD

FIGURE 32.

20 rJ8

PAD .

Test Set-up for Frequency Respxwe Check.

I I
I

L---J

500

TERM.

I

MODEL

103A

0874

_’ ‘i

SECTION 7. REPLACEABLE PARTS

7-4. HOW TO ORDER IaRTS

a. Replaceable parts may be ordered through the

Mother iioilrd, Part 1
Mother I3oard, Part 2
Filter & Overload

Regulator (103LA)
Power Supply (1031,A)

I

I

2
3

1”
11

4

i

%
4
4
2
2

14
15

16
17

i

4
4

4

)DEL 103A

REPLACEAULE PARTS

0874

F%GUIW 33.

Chassis Assembly - i:xplodcd View.

Cl04
Cl”5

MODEL 103A AMPLIFIER

Cl06
c1.07
Cl08
Cl09
Cl10
Clll

OlOl
“102
“103
0104

010.5

25 v
25 ”
25 ”
2” v

25 v
25 ”
20 ”

25 ”

EM.
EAL

EAL
ETT

ML
E/IL
ETT

I:AL

29109 JC810025"F
29309
29309 IC81002.581'
17554

29309
17554
29309 JCR10025RP

JC1250025HF
TSD1-20-I",,F
JC8100258P

TSD1-2"-1",,F

2”
28

28
28

28

28
28
28

Kill 10 kn
R112 10 kfl
K113 10 kfl
K114 560 12
R115 10 0

lO’X, l/4 w
LO%, 114 w
lO%, l/4 w
IO%, 112 w
lo%, l/4 w

44655
44655
44655

01121

44655

Gil-560-10%
CD-loo-10%

~116
RI17 1 1‘0
I<118 10 ki,
R119 100 ki?
R120 1 kfl

K121 1 kfl
R122 100 kfl
R123 10 kll
R124 1 kn
R125 1 kcl
KU6 100 n
KU7

QlOl

4102

Q103
Q104
Q105 Silicon, NPN, case TO-92

QlO6
Q107

10" n

1 k0

Silicon, NW, Case 'X-106
Silicon, PNP, Case K-110
SilLcon, NPN, Case TO-106 07263 2N3565 K-39 28
Silicon, NW, Case TO-92

si.licoLl, PNF
Silicon, FNF

lO%, l/4 w
lo%, 114 w
1'L, l/B w
I%, I~/8 w
lo%., l/4 w

I"%, l/4 w
If, l/8 w
I,%, 1/a w
LO%, l/4 w
lo%, l/4 w

lo%, l/4 w

LO%, l/4 w

44655

44655
07716
07716

44655
44655

07716

07716

44655
44655

44655

44655

TRANSIST”RS

Mfr. Mfr.

07263 2N3565 K-39 28
07263 517638 'K-33 28

04713 2N5089 K-62 28
04713 2N3904 TG - 4 7 28
04713 ZN3906 'X-84 28
04713 IN3906 'X-84 28

CEA-lOOK-1%
CEA-lOK-1%
CB-102-10%

L(eithley

Fig,.

CI~79-1OM
C47-.1M

600 "
20" v

C206 1.00 WF
C207
C2”8
C209

C210
c211 7-25 pl> 300 " var 72982 538-037 C175-7/25P 29

c212 .0022 Ifi 1000 v CcrD 72982 81100OXSF0222K C22-.0022H 29
C213 .0022 Iii‘ 1000 v CerD 72982 811000X5F02%2K C22-.0022M 29
C214 100 $lF 15". 10% I:TT 06751 TS"SI5107h C205-lOON 29
C215 100 @F I"", 10% ETT 06751 TSD515107A C205-100&f 29

0874

I,00 pF
470 pP
470 pF
.OOl p

15", 10%
15", 10%
100" v
1000 v
1000 "

72982 801-Z5UO-472M

13050 SMlh-0. lUF
06751 TSD515107h

06751 TSD515107A

56289 m-471-10% C64-47OP

56289 m-471-10% C64-470P

72982 8o1ooox5Po

C22-.0047N
C47-.lM

c205-100M
C205-lOOEI

C64-.OOiEf 29

29
29

29
29

29

29
29

29

31

CEA-1%-l%

CEA-15K-1%
CEA-LOOK-1%
WA-lOOK-1%

ma-15K 29
R88-15K 29
K88-1”OK 29
R88-10°K 29
K12-10M 29

R211
II212
R213
R214

K215

cmnp
MtF
camp
MtF
MC

MLF
MC

MU
MCF

MCF

75042

07716

75042

“7716

1137.10’) 29

CI‘A-IOK-1%
CEA-K-l%

CCA-301-I%

m-1/8-200
MMF-l/K-1.8K

CI:A-,~OK-I%
CC/I-IK-1%

11226

R227
1R228

11229

R23”

KEPLVCEABU FAKTS

II231
11232

11233

K234

K?35
R236

R237

N238
11239
R240

K241

11242

I<243
R244
R245

R251
R252
R253
R254
R255
R256
R257

1”
1” kR
1”

WA-IOK-, %
CF.&?OK--L%

CEA-49.9&l%

CIFF-l/R-*I(
MFF-l/X-1OK
MW-l/II-X

“7716

CC*-9.76K-l%

“7716 CEA-IOK- I%

91637
37942 MTC-1.4

n
n

44655
446i5

0,716

44655

!4FF-l,/&IK

CII-330-l"%

CD-100-l”%
CEA-l”K-I%
CR-102-l”%

1K76-33

K/6-33

K88-1°K
K76-I”

QT"l
Q202

9203
4204
4205
Q206

Q207
9208

q209

Q21"
Q211
q212
Q213

Q214

0874

"4713
17856
"4713

“4713

"4713

"4713

REPLACEABLE PARTS

""DEL 103A AMPLIFIER

C306
c307
C308

c309
C31"

c311
c312
C313
C314
C315

C316
C317

C318

c319
C32"

1”
1

.33 pF
.I s

."33 p
.Ol pF

.0033 p.F

,001 pJ
33" @
82 pF

7-25 pF

1" liF

100 p

1"

I

$

.33 p.F
.I pF
,033 @
.Ol pF
.a033 pF

20 ”
2" "
2" "

100 "
200 v

1""" "

2"" "

100" v
1""" "

300 v

20 "
15 v
20 "
2" "

20 "

1"" v

20" "

i.00" v

""Wm AMPLIFIER,

CAPACITORS

"300" SERIES PC-294

Mfr.

-

Code

17554
17554
17554

TSDl-2”-1”UF

C179-1"M
TSDl-ZO-1llF C2"4-lM
TSDL-20-0.33UF C2"4-.33M

29
29
29

"

84171
14659
84171
72982
72982

72982
17554
"6751
17554
17554

17554
8848"

"4171
14659

3FR3331E

ZPJ-"."I!JF
loss-"33

C146-."33M

Cl"8-."*M

C64-,""33M

2P.h0."01!JF Cl"R-."OlM
831000X5F

Cbb-3301'

831"""X5F C64-3301'
538-037 C175-7/25P

TSD1-20-10VF c179-LO?,

TsD515-100,~P C205-1""M
TS"l-2"-l"L!F C2"4-I",!
TsDl-z"-l,~F

C2"4-1EI

TSDl-ZO-0.33uF C2"4-.33W
3F113331F

2P.L"."lvF

Clbb-.0333
C1"8-."lM

1055-033 C64-.0"33M

29

29

29
29
29

29
29

29

29

29

29

29

29

29

29

C321
c322
C323
C324
c325

C326

C32,

msig.

QA301
QA302
QA303

Circuit
mstg.

5301
5302
5303
5304
P301
8301
5302

D301

no5
5306

,001 pF
.01

1"

.Ol

$
1" UF
1"
10

20" "
6"" "

2" v

60" "
2" v
2" "
20 "

Type

Operational Amplifier

Integraeed circuit, (Dual)

"pera~ional Amplifier

Type Code Part NO. Part NO. Kef.

Receptacle, RNC
Recepracle, RNC
connector, Housing
conrlector, Housing
Receptacle, Male, 4 Pins
Switch, Rotary, "Lo/in CUT"
Switch, Rotary, "CAIN"
Diode
Not Used
Keceptaclc, 22 Pins

84171
72982

17554
72982
17554
17554
17554

ZPJ-"."olUF
871-25U"G103?1 c22-."I
TSDI-2"-I",,F

871-25""-103x c22-."1
'TSD1-*a-1"UF
TSDl-*"-l"uF
TSD1-2"-1"uF

C1"8-.""1?1
C179-IO?,
C179-lot.1

c174-10%
C179-1"M

Mfr. Keichley

Code
1204"

"7263

1204"

Part NO.

LM31OH IC-18 29

"6E7739393 IC-28

LEL3101, IC-18

Fart NO.

MlSCELLANE""S

Mfr. Mfr. Keithley Fig.

95712 6672NT34 CS-15
95712 6672NT34 CS-15
22526 20370 CS-251
22526 2037"

CS-251
"266" 126-1427 CS-162
80164

SW-342

SW-342

801.64 SW-341 SW-341

"1295

09922

lN914 RF-28
PSC4SS2212

cs-182

29
2')
29

29

29

29

29

Fig.

Ref.

29

29

MDEL 103A AMPLIFIER

REPlACEABLE PARTS

44655
07716

11306
R307
R308

R319

K320

R321
R322
K323

15
I
1

k0

20x, *

kR “.l%,

0
0

R

lo%, l//i w
102,

IO%,

1” 0 1m,

kc2

2

I/.,
1” n 10%.
1 ICI7

I.“%, l/2 hr
1” n lo%,

l/8

w

l/8

W

l/4

w

11637

l/4

w

114

w

114
l/4

W
w

w

MODEL

"7716

l"31A

IIEG"TAIT"K ""AK", "10"" SI:RIliS,

7145"

91637

"7716
91637

91637

44655
44655

91637

44655
44655

44655
“1121
44655

POWER SUPPLY

PC-261

iNP74-5°K

RF71.-50x

29

29

CL"1
Cl02

CL"3
Cl"4
Cl"5
Cl"6

1" m

47"

pF

2" "
1""" v

10 pF 2" v ryr
1" fl

47"

PF

2" " ETT
10"" " Cer"

1" ILF 20 " ETT 17ss4 TS",-2" c 17 9 - 1 ON

ETT
ccro 72982 801000x5F" C64-1,701'

Circuit

hsig.

QlOl

Q102
QAlOl

QAlOl Inregrated Circuit, Rcl-crence Amplifier

J101

J102 Test Jack

J103 Test Jack
x04 ‘rest Jack

"874

Type

‘Trnnsistor, NFN, Power) case TO-66

Transistor, NW, Power, case w-66
Integrated CiTC”it, Xeferencr Aaplirier

No,- Used

17554

17554 TSDI-2"
17554
72982 8"1O""S5F" C64-4701'

'L'S"l-2" Cl,9-L"E, 31

Cl79i"? 31

TSUl-20 CL79-1°F

Mfr.
Code

"2735

02735
"7263
"7263

_-

8333"
8333"
8333"

31
31

31

31

:is

REPLACEABLE PARTS

""DEL 103A AMPLIFIER

REG"L/IT"R BOARD, "1""" SSRIES. PC-261

RESISTORS

CiX"it
lksig.

Xl”1 845 n
rt102 3.0 n
it103 2 kn
K104

2"" n 75w

K105 1.3 k0

Rating

1%, l/8 W
5%, l/2 w C"lllP
I~%, l/8 w

l%, 1;s w

Kl"6 845 S l%, l/8
11107 3." 0 5%, l/2
K108 2 k&l l%, l/8

II109
Rll" 1.3 kn

20" R .75w

I%, l/8 w MLF "7716

CiXUit
Desig.

c201
CZ"2
C203
C204

Value
200 pJ

200 $lF

20" pF
2"" LIZ

rating
35 v

35 v
35 "

35 v

Mfr. Mfr.
Code

MtF

07716

01121
MtF
Camp
MtF

"7716

80294

"7716

w MtF 07716
w Camp 01121
W MtF 07716

camp

80294

MODEL 1031A POWER SUPPLY

MOTHER lS"AKD ,

"200" SERIES, N-295.

CAPACITORS

Mfr. Mfr.

Type
EN.

EAL
EAL
EilL

Code Part NO.

90201 MT"200N35
90201
90201 MT"200N35
90201 MT"200N35

Part NO. Pare NO.

Keithley

CEA-R45-1%
m-3.0-5%

CEA-‘X-IX

3009P

CEA-1.3K-1%

R88-845
R19-3
RV-2K
KPR9-ZOO
R88-1.3K

rig.
Ref.

CEA-845-l% K88-845 31
E&3.0-5% 1119-3 31
CCA-2K-1% RS8-2K 31
3009P
CEA-1.3G1%

RP89-200
KSS-1.3K

Keithley

Part NO.

31
31

Fig.
Ref.

C177-2""M 3"

HT"200N35

Cl,,-2"OM
C177-2"OM
C177-ZOOM

30
30
3"

Circuit
De2Sisx..

"201
D202

"203

"204

circuit

Desig.
It201

R202

5201
5202
5203
3204
.I205
5206
T201

"S201
5201
5202

F201

P201
5207
5208
5209

36

Type

Full.-wave Rridge, 2A, 100"

Silicon
Full-wave Bridge, ZA, 100"
SiliCO"

Type

Resistor, 100, lo"/., lW, Camp.

Resistor, lO"krl, l"%, 1/m, camp.

Connector, lo-Pi"

connector, 5-Pi"
connector, IO-Pin
Receptacle, 15-Pin

Socket (for "5201)

Connector, 5-Pin

Transformer

Pilot Lamp
Switch, "LINE"
Switch, "POWER ON"

Fuse, Slo-Blo, l/8 A, 3 AC
Power Cord
Receptacle, 4-Fin
Receptacle, 4-Pin
Receptacle, 4-Pin

Mfr.

Mfr.

Code Part NO. Part NO.

83701 PI)-10
01295

IN645
83701 P"-10
01295 IN645

MISCELLANE”“S

Mfr.

Code

"1121
01121
22526
22526
22526
"9922
72619

22526

Mfr.

Part NO.

cB-I~Oi<-lo%

EB-104-l”%

20052
2037"

20052
PSC4SS1512

7538XP5"

2037"

80164

"3797

80164

CC03iiCSN11"
SW-151.

80164
7140"
70903

"2660
"2660
"2660

Mm-1IRA

172585
126-1429

126-1429
126-1429

KeiLhley

Fig.
Ref.

W-36

RF-14
RF-36
RF-14

30
30

3"

3"

Keith&y Fig.

Part No. Ref.
KZ-10 30

Rl-10°K 3"
CS-237 3"
CS-251

3"
m-237 30
CS-175
SO-58

30

30
cs-251 3"
T&i;6 3"

FL-52 3

SW-151 3

SW-271

m-20 3

CO-6 3

CS-163
CS-163
CS-163

3
3
3

OS74

I. .-

SCHEMATIC DIAGRAMS

j:

”

! -

E

!

7’

Y

i
:

.KT ‘OW.+

--

-

-

n

-

-

-

-

L

AAAhAhhhhA- AAA

[

KEITHLEY INSTRUMENTS. INC.

28775 AURORA ROAD

CLEVELAND, OHIO 44139

SERVICE FORM

MODEL NO.

NAME
COMPANY
ADDRESS

m

Describe problem and symptoms using quantitative data whenever possible (enclose
readings, chart recordings, etc.)

Show a block diagraln of your measurement system including all instruments connected

El

(whether power is turned on or not). Also describe signal source.

SERIAL NO. P.O. NO. DATE

PHONE

CITY STATE

(Attach additional sheets as necessary).

ZIP

List the positions of all controls and switches on both front and rear panels of

' the instrument.

Describe input signal source levels, frequencies, etc.

El

pJ

List and describe all cables used in the experiment (length, shielding, etc.).

List and describe all other equipment used in the experiment. Give control settings

@ for each.

a Environment:

Where is the measurement being performed? (Factory, controlled laboratory,
out-of-doors, etc.)
What power line voltage is used?
Ambient teniperature?
_..._.

@

Additional Information.

please describe below.)

-

Variation? Frequency?

"F.

Variation? "F.

(If special modifications have been [made by the user,

Rel. Humidity?

._

I

!5

”

.-

u

+

q

-.

.-

v,

t

I

I

-El-

0302

0303

hl

V

3

' 5

I
I

I 3

1)

4, j>’

l 5”

J306

D

1

RJO4

4Aw

IO

fS

1

I