EAI 580 Analog/Hybrid Computing System Maintenance Series: Console Components
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ANALOG/HYBRID COMPUTING SYSTEM
MAINTENANCE SERIES
CONSOLE
COMPONENTS
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MAINTENANCE
RELATED PUBLICATIONS
e below lists other publications which may be of interest to the readers of this manual.
Title Publication Number
or Analog Computation : 00 800. 0001-3
of Parallel Hybrid Computation 07 800. 0016-0
Handbook 00 800. 2055-0
ymponents Manual j 00 800. 2056-0
ting Components Manual 00 800. 2057-0
ic Expansion Group 00 800. 2058-0
gital Voltmeter, Model 26. 268 00 800. 2059-0
petitive Operation Display Units, 00 800. 2024-1
4 and 34, 035
=p Ee ne es oe. le. Se. eB. es. Se. Be. 2 eee
NOTICE
and efficiently, we request your conformance with the following procedure:
Please specify the type number and serial number of
the basic unit as well as the EAI part number and de-
scription of the part when inquiring about replacement
items such as potentiometer assemblies or cups, re-
lays, transformers, precision resistors, etc.
ihe
2. When inquiring about items as servo multipliers, re-
solvers, networks, printed circuit assemblies, etc. ,
please specify the serial numbers of the major equip-
ment with which the units are to be used, such as:
Console, Type 8811, Memory Module, Type 4. 204,
Serial No. 000, etc. If at all possible, please in-
clude the purchase order or the EAI project number
under which the equipment was originally procured.
Your cooperation in supplying the required information will speed the processing of your requests
and aid in assuring that the correct items are supplied.
It is the policy of Electronic Associates, Inc. to supply equipment patterned as closely as possi-
ble to the requirements of the individual customer. This is accomplished, without incurring the
prohibitive costs of custom design, by substituting new components, modifying standard com-
ponents, etc., wherever necessary to expedite conformance with requirements. As a result,
this instruction manual, which has been written to cover standard equipment, may not entirely
concur in its content with the equipment supplied. It is felt, however, that a technically quali-
fied person will find the manual a fully adequate guide in understanding, operating, and main-
-
—— a,
~-
In order to enable us to process your requests for spare parts and replacement items quickly
=
t
——s.
———
=
——
—s
—
I
—
Lm taining the equipment actually supplied.
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CONTENTS
CHAPTER 1 - SYSTEM INTRODUCTION
1.1 GENERAL DESCRIPTION ....---s-eeeeeeeescsccreccecresees wc oens
1.2 SCOPE OF MANUAL AND STANDARDS ......+.2+5000- © cee esieleee
1.3 INSTALLATION INFORMATION ........cccseccsseccceccccccsveres
1.4 MANUAL SCORE AND STANDARDS «).\« 5/2 «+ + «os aieleisis\ieiere steelers # oetele
1.5 RECOMMENDED TEST EQUIPMENT .........0.ceeceececccecveccs
APPENDIX 1 - REPLACEABLE PARTS LISTS ....0.0ssccscceccecvcescevumeciiices
APPENDIX 2 - DRAWINGS .......-- aonb coon seer eeee ele «0 ais elelsleivists e clelslaiel cisions .
CHAPTER 2 - GENERAL MAINTENANCE INSTRUCTIONS
2.1 GENERAL INFORMATION ......... © aie) o ele ell lele s)ers) ere ieleierels oie sleisiy visiels
2.2 PREVENTIVE MAINTENANCE ..---cccecccveccccccrcceccccccccee
2.3 SERVICE TECHNIQUES 22.20.26. 5cacsccecsecc ess esis (efale| wiovelalsterele/ale
2.4 TROUBLESHOOTING ..........-. cscs essceees $a es hiwisiel sis sieivre sieletsl=
2.5 MAINTENANCE EQUIPMENT ........ Apondnn bobo cooocodeccoccoud
CHAPTER 3 - COMPUTER MODE AND TIME SCALE CONTROL SYSTEM
3.1 INTRODUCTION ............... a sce ecdeyeaie-aiei.ce pind ee warabias sae sees
3.2 ANALOG OPERATING AND SET UP MODES .......-.e-eeeeeececees
3.3 ANALOG MODE AND TIME SCALE CONTROL .....-+e+eeeeeeeerees
3.4 THEORY OF OPERATION .........-+-+-+-e- oi asdign 3 oe
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CONTENTS (Cont)
-TER 4 - READOUT SELECTOR SYSTEM (Cont) ,
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APPENDIX 2 - DRAWINGS
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5.1 INTRODUCTION
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5.2 TECHNICAL DATA .........eeccereeeccceneererseserreressees
5.3 THE SERVO ATTENUATOR SYSTEM .....-seeeeeeeeeeeseererseeees Oot
5.4 HANDSET ATTENUATORS .........0eeeesereccceeeeseseseeseserces 925
5.5 CIRCUIT DESCRIPTION .........:sseeeeocecccceeetsereseeecscees 5-6
5.6 MAINTENANCE AND TROUBLESHOOTING .......+0-+eeeeeceeees we. 5-8
ay - REPLACEABLE DARTS LISTS .....0--,5cesceserorscrscccceesceees 5-13
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CONTENTS (Cont)
CHAPTER 8 - POWER DISTRIBUTION (Cont)
8.2 PRIMARY (AC) POWER DISTRIBUTION ...........cc.cecceeccoese. 8-1
8.8 PATCH PANEL DRIVE SYSTEM .0.c..s0c.ccewsecenesss cnc ceed
8.4 SECONDARY (DC) POWER DISTRIBUTION .............cceeccceeee 824
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APPENDIX 1 - REPLACEABLE PARTS LISTS .......... #14) 0 sieisheie-s}elole eee eeneee O55
APPENDIX 2 - DRAWINGS .....--2---++eeeeee HHOD oan GosdGG4a0ce Mecedeoosocdde eal
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1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
21
3.1
22
3.3
3.4
3.5
3.6
3.7
28
4.1
4.2
ILLUSTRATIONS
Title
The 580 Analog/Hybrid Computing System .....6.0.eeeeeneeeees
580 Computer Console Layout (Front View) ....scecessecevevees
580 Computer Console Layout (Rear View). .......-..eseeeeeee
Basic Patch Panel Layout......... sole e eleverae oa 1e)0 1a ele’ teehaleyelejanetehe
Typical 580 Patch Panel Field Arrangement .....0+ssceceesveee
580 Computer Dimensions ......-+++..-. b o)e e)«]she olakeieralstaalstelsitete
TBI Jumper Positions ........ aga sale rannes amen bate sic ls sia caselegers
Trunk and Accessory Connector Panel ....cesvccssccccceserces
Inserting the 580 Pre-Patch Panel ......ccreresssccccecceeses
Removal Of PGE PAGR os sic... 2c ccc oun nav en alg ssldale als cle sisisielele
Mode Contyol Keyooard ..0..005 00s ven ese es nse 04 sae oleic sisini=
Control Tray, Model 0.12.1607 .....ccuceecceecseseccscsecees
Analog Mode and Time Scale Control Circuits, Block Diagram ..
Analog Mode Selection System, Simplified Schematic ........-.
Analog Timer, Simplified Schematic .......cseecceveeseccevens
Chart Control CI CUit iain oo. 05.0.0 0 vic.cje 0 © oo «me sini nisia) sain ierapayniees
IBLGNRING CLV CULE ~. cin cia oleae oe) v= «lsiejoieal« 018 aince]e miei6 s)ai0 ai tis ater psesters
Trunk Wiring on Control Tray .....eccecccccenccesvcscseseace
Location of Address Select Switches ......ccececcceecereeseeee
Location of Select Mother Gard .........<ssseescssecces esse
Signal Selector System, Simplified Schematic (2 Sheets) ........ 4-4 - og a
Derivitive Switch rioner gers? & Schematia eee ee ee ee eee eee
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1-2
1-3
1-4
1-5
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ILLUSTRATIONS (Cont)
Title
Power Supply, Model 0.10,0354....ccccevecneneecerenseeeeseees
+30 Volt Regulator .........cccccucsceucceecs
+Reference Supplies, Simplified Block Diagram ....s.ee+eee0es *
+10 Vou Reference Regulator, Simplified Schematic ........+6.00+
Bus Bar Layout .....
Adjustment Potentiometers Layout ......scseeeveceeceeeseeeeees
“Reference Adjustment Circuits .....cececcecececcucvcecuceccces
Reference Balance Adjustment Circuit ....... o Sade oo bb doe
Primary Power Distribution .......
Patch Panel Drive System ....
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CHAPTER 1
SYSTEM INTRODUCTION
1.1 GENERAL DESCRIPTION
The 580 Analog/Hybrid Computing System (Figure 1.1) is a medium scale, general purpose,
10 volt computer. This analog/hybrid computer features selection of a wide variety of analog
and synchronous logic components to provide many classes of problem solving capabilities.
The basic system is pre-wired to permit plug-in expansion to a full equipment complement.
This feature permits the user to select those components necessary for the immediate needs
at hand, and, as desired, to expand the system to meet futrue requirements.
1.1.1 General Layout
The computer console is organized to optimize both electrical operation and operator convenience.
Figure 1.2 shows the location of the major components at the front of the computer.
In general, active computing components are housed in trays that plug into connectors at the
rear of the patch bay area. These trays are self-shielding, with critical components directly
connected to gold-plated patching contacts to minimize lead length. The removable patch panel
(covering the patch bay area), can be pre-programmed remotely from the computer. The use
of multiple pre-programmed patch panels permits different groups to share the computer with a
minimum amount of wasted computer time. A motor-driven locking system positions the patch
panel holes precisely in front of the patching contacts and assures positive connections.
1%
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| CHAPTER 1 SYSTEM INTRODUCTION
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! ANALOG ALOG
| READOUT OATH
PANEL PANEL
MFDG
DRAWERS
- AUXILLARY
a) KEYBOARD CONTROL PANEL
Figure 1.2. 580 Computer Console Layout (Front View)
Controls for variable diode function generators are housed in slide-out drawers mounted be-
neath the patching area. All controls within the drawers are clearly identified and positioned to
assure ease of operation.
The power supply is mounted behind the control panel area and is accessible from iiecrearcot
the computer. Level-setting potentiometers, fuse and ac receptacles are located on the front
panel of the power supply and are also accessible from the rear of the computer, A terminal
poard (TB1) is mounted inside the power supply with jumpers arranged for 105-125 volts or
210-250 volts. (See Paragraph 1.4.2.) The regulated output voltages are wired directly to
bus bars at the rear of the patch bay.
The main operating control pushbuttons are keyboard mounted on the work shelf. The pushbuttons
are arranged in logical groups for convenience, and are the only controls necessary for normal
operation during problem setup or computer operation.
ro
ary
J
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CHAPTER 1 SYSTEM INTRODUCTION
Auxiliary and less-frequently used controls, manual attenuators, and indicators for analog and
logic computing components are included on panels adjacent to the patch panel. Some of these
controls are supplied as expansions with digital logic components,
The servo-set attenuators are mounted on a hinged panel at the rear of the computer, as shown
in Figure 1.3. As many as 70 attenuators, each having a drive motor and a relay switching cir-
cuit, may be installed. Wiring for a complete potentiometer complement is included with the
basic panel; expansion is accomplished by inserting potentiometer assemblies into mating con-
nectors and securing the units in place with screws.
The digital voltmeter (DVM) is mounted in the area beneath the logic expansion unit. Space
is provided below the control chassis for the addition of interface components if the system is
expanded for full hybrid computation.
1.1.2 Patch Bay Organization
The layout of the patch bay provides maximum convenience and requires a minimum amount of
programming time. A description of the electronic location (address) and physical location
(position) is given below.
For purposes of addressing components for readout, the patching area is divided into 8 fields
(Figure 1.4). Each field consists of seven trays, grouped in an arrangement similar to that
Figure 1.3. 580 Computer Console Layout (Rear View)
oaame
meee I lok is he
SYSTEM INTRODUCTION
d on the components patching
-2, -3, -4, and -5 in
The address
wn in Figure 1.5. The units portion of the address is displaye
For example, the 0.6. 0704-2 Quad Amplifier is designated 45
h field. To complete the address, add the field number in the tens position. es, ci,
for the amplifiers in the quad amplifier tray located in field 0 would then _ ay for
105. This system of numbering is used for all components capa eo . designed for
readout. Note that due to the flexibility of the 580 Computer, trays that are no Bucy
Peeaodt (denen ding on system requirements) may replace trays that have .. aa =A
For example, the 0.16, 0355 QUAD LOG DFG and the 0.16. 0356 Sine-Cosine DFG W
has no addressable
~ contain amplifiers -6 and -7 may be replaced by a 0.7, 0146 Multiplier which
feature.
| |
| CONT. FIELD |
}<—______ FIELD O TRAY
AREA
es, 5 el TRUNK FIELD 3
FIELD 2 AREA
TRUNK FIELD 5 >
—— ———FIELD 4 poe eo
q
F TRUNK F
| sexo TRUNK ig __________ FIELD 7
Figure 1.4, Basic Patch Panel Layout
jbered in ascending numerical order
2s, each tray position is num!
f trays are numbered 1 through 15. The positions in the
1 30, This numbering system is carried out for a total of
of ray osition is used to allow easy correlation
le, tray position 1 coincides
used in a single tray position,
oth connectors have the same
ao
aputing Components
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CHAPTER 1 SYSTEM INTRODUCTION
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QUAD AMPLIFIER DUAL MULTIPUER DUAL AMPLIFIER £ £S-D, i
0.6.0704-2 07.0146 0.6.0614-1 aiesel
DUAL AMPLIFIER DUAL INTEGRATOR POT-COMP-F/R
Z 0.6.0614-1 012.160
042.0340
Figure 1.5. Typical 580 Patch Panel Field Arrangement
1.2 SCOPE OF MANUAL AND STANDARDS
This manual, and the other manuals in the 580 Analog/Hybrid Computing System Maintenance
Series, are intended to provide sufficient information to permit reasonably skilled personnel to
maintain the computer at specified accuracy. Basic theoretical information is omitted, as are
detailed patching instructions and application information. A summary of the basic principles
of analog circuits is provided in Appendix 1; a bibliography at the end of this manual lists
many useful books for those desiring more detailed theoretical and background information.
The 580 Reference Handbook (EAI Publication Number 00 800. 2055-0) provides complete
patching and operating information for the computer. A Handbook of Analog Computation (EAI
Publication Number 00 800. 0001-3), supplied with all 580 Computers, provides basic program- |
ming and scaling information.
1.2.1 Standards, Definitions, and Conventions
The 580 Maintenance Series manuals conform with commercial standards in format and content.
In addition, military standards and abbreviations and schematic and logic symbols (MIL-STD-
12B, MIL-STD-15-1A, and MIL-STD-806B, respectively) are used whenever applicable. How-
many specialized terms and phrases are frequently abbreviated in the text of these
In addition, several terms have
ever,
manuals; these abbreviations are defined in Paragraph 1.2.1.1.
special or restricted meanings when used in the 580 Maintenance Series manuals; these terms
are defined in Paragraph 1.2.1.2,
uae
SYSTEM INTRODUCTION
see tetl ntractions used
Abbreviations and Symbols, The abbreviations and co
h ie fic Computing System Maintenance Manuals generally comply with MIL-STD-1 2B.
© Space limitations on the patch panel, and the use of many special terms, Some —_—
been necessitated. The following is a list of abbreviations used with the 580 Scientific
aputing System. |
Definitions
Output for IC bus drive
Output for operate bus drive
Amplifier junction
7 Amplifier select line
Integrator capacitor termination
iT (Plot) Input for recorder chart drive
Input control for analog to digital comparator
Console
Cosine
Digital-to-Analog Switch
Diode function generator
Input for plotter pen control
Input to digital voltmeter
Feedback for shaping network
selects 10 times smaller capacitor when word exposed
Feedback
Field effect transistor
Flip-Flop
Function junction
Function of (X), MDFG output
Abbreviations
MDFG (VDFG)
MJ
MULT
O
OJ
OLS (Control)
OP (Control)
ORH (Control)
OVD (Control)
1p
PC
BOT
PP (Control)
Definitions
Junction for shaping network
Latch
Limiter junction
Low end of ungrounded pot
Manual
Manual diode function generator
(Variable diode function generator)
Multiplier junction
Multiplier
Output
Operate junction
Input for overload store
Override for operate bus
Integrator operate mode control
Input for override hold (integrator only)
Overload output
Wiper of pot
Pot coefficient
Potentiometer
Output from patch panel mode
Input to reset function relay
Passive precision resistor (10 = 10K; 100 = 1K)
Output from reference digital-to-analog converter
Reference
Relay
Resistor junction
Repetitive operation
put to control RE
Track input
Output of sweep sawtooth
Track feedback
Track junction
Time scale, selects 500 to 1 capacitor
Track/Store
Voltmeter input
Input to plotter arm
Horizontal input for display scope
Multiplier X junction
Input to plotter pen
Input to channel 1 of display scope
Input to channel 2 of display scope
Input to channel 3 of display scope
Input to channel 4 of display scope
Multiplier Y junction
Override for display scope blanking
Plus reference
Minus reference
Input to plus log
Input to minus log
Input for plus limit
Input for minus limit
X input to multiplier
Inverted X input to multiplier
Y input to multiplier
rted Y input to multiplier
to aid multiplier patching
_
SYSTEM INTRODUCTION
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ee SYSTEM INTRODUCTION
Abbreviations _ Definitions
AS Integrator feedback
fs Integrator junction
° Phase angle (Theta)
Y Digital inverter
> Digitally controlled analog switch
Function relay in set position
R
A Passive diode
1.2.1.2 Glossory of Terms. This paragraph provides a list of computer and
integrated circuit terms used in the 580 Scientific Computing System Maintenance Series manuals.
Many terms not unique to the 580 System are specifically defined as used in this manual.
Address The location of a computing component; code designating
the exact storage location of an operand.
Amplifier Junction The input terminal of an operational amplifier.
Digitize Converting an analog measurement of a physical vari-
able into a numerical value.
A voltage measuring device that provides a numeric
Digital Voltmeter
indication of the value of an analog input.
Attenuator A device used'to reduce the level of a signal. This term
is used interchangeably with potentiometer in this
manual.
An isolation or driver circuit common to digital logic.
Also used as temporary storage units in the computer.
Normally a buffer is an emitter-follower type of cir
Electrical circuit over which power or data is transn
A circuit using diodes as switches for input or fee
resistors. Used to simulate many no
Electronic circuit with two stable st
oe
SYOTEM INTHODUCTION
A woparate ground return provided for genitive Cori-
puting components, Ne current flow ie permitted, elim
inating noise resulting from an It voltage drop in the wire
or bus,
* A computer which has both analog and digital capabilities.
oo rault The BIA (Hlectroni¢ Industries Association) defines a
semi-conductor integrated circuit as: "The physical re-
alization of a number of electrical elements inseparably
associated on a continuous body of semiconductor material
to perform the function of a circuit, i
A circuit in which the output logic level ise alwaye opposite
to the input logie signal.
Mathematical approach to the solution of involved pro-
blems by the use of symbols which define basic concepts.
The three basic logic symbols are: "AND, OR, and NOT",
Pertaining to the assisting of human memory; thus, a
mnemonic code 19 usually an easily remembered abbrevia-
S tion,
To supervise and check the correct operation of a pro-
gram during its execution. Monitoring equipment ava{l-
able with the 580 System includes indicator lights, visual
and audible overload alarms, a digital voltmeter, and an
oscilloscope.
An undesirable voltage appearing at the output of an
operational amplifier whose input is held at zero,
Circuit components with no gain characteristics: resistors,
Auxiliary units which may be placed under computer
con ty ‘ol,
kn | ‘resistor used in analog computers for
y A constant » also called an attenuator.
mn speed adjusted so that it can in-
A SAS eA EF RPrrrnrre = = ££ 8 = = «= = Ss
SYSTEM INTRODUCTION
Scale Factor A number used to multiply or divide quantities so that
each desired variable is within the problem parameters.
Stabilizer A circuit in an operational amplifier that increases dc
gain and reduces offset.
1.3 INSTALLATION INFORMATION
1.3.1 Site Preparation
The 580 Analog/Hybrid Computing System requires no specific site preparation. It is designed
to operate in normal laboratory, lecture hall, or office environments, The computer is designed
for operation on a base such as a desk or table. It is suggested that the base be equipped with
casters, simplifying maintenance or relocation of the console. Specific primary power require-
ments and operating and storage environments are listed in Table 1.1.
Table 1.1. 580 Computer Characteristics
Characteristics English Units Metric Units
Operating Voltages 105 Volts AC +10% 210 Volts AC +20%
115 Volts AC +10% 230 Volts AC +20%
125 Volts AC +10% 250 Volts AC +20%
Operating Frequency 50/60 CPS, 19 50/60 CPS, 19
Operating Power (Maximum
Length 52 Inches 134 Centimeters
Width (Depth) 28.8 Inches 73.1 Centimeters
Height 32.4 Inches 82.3 Centimeters
Weight (Maximum, Fully Expanded) aaa
600 Pounds 272 Kilograms —
From 20% to 90% From 20% to 90%
Sea Level to
10, 000 Feet
From 0°F to 120°F
Ve -_
i
1.3.2 Uncrating
7 ba computer is normally shipped crated, For domestic shipment, all co
CNN
SYSTEM INTRODUCTION
mponents are installed
Computers
After the computer crate is opened (following the instructions attached to the crate), the com-
_ puter may be positioned on the base,
‘igure 1.6 illustrates the major dimensions of the computer. Computers shipped to destinations
operation is specifically requested on the Purchase Order.
in the United States or Canada are normally wired for 115 Vac operation unless 230 Vac
aes ft 19.5
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CHAPTER 1 SYSTEM INTRODUCTION
Computers shipped to points outside the USA or Canada are normally prepared for operation from
a 230 Vac single phase source. Changing from one voltage to another is easily accomplished by
changing jumpers on terminal board TB1 (mounted inside the power supply). Figure 1.7 illus-
trates the jumper position for 115 Vac or 230 Vac operation.
CAUTION
Do not connect the computer to a primary power
source until the jumper positions are checked.
See Figure 1.7.
OOOOOE ©C®OGOO®@
(a) 105-125V AC OPERATION (b) 210-250V AC OPERATION
Figure 1.7. TB1 Jumper Positions
1.3.3 Accessory and Trunk Connectors
Accessories for the 580, such as plotter, recorders, etc., are connected to the computer by
cabling to the appropriate connector on the trunk connector panel. Figure 1.8 shows the func-
tions terminated at each connector. Note that one connector position is blank; connectors may be
installed in this position for custom hybrid computer systems. If the additional connector is in-
stalled at the factory, its functions are described in supplemental system publications.
DIGITAL TRUNKS ANALOG TRUNKS
Figure 1.8. Trunk and Accessory Connector Panel
The analog and logic trunks are also terminated in this area. Connectors AT1, AT2, and AT3
terminate the analog trunks. Connectors DT2 and DT3 terminate the logic trunks.
YS ABYLY
1-13
a =
NOTE h
Prior to operating the computer, check to ensure that these
connectors and the PS1-.J1 connector are in their proper
positions and fully inserted,
1.3.4 Insertion of Pre-Patch Panel
To insert the Pre-patch panel, align the lugs on the bottom of the pre-patch panel frame with the
slots in the bottom rail of the patch bay (Figure 1.9). Push the pre-patch panel forward until
the lugs on the top of the frame mate with the slots on the top rails of the patch bay. Gently
slide the pre-patch panel slightly to the right. Depress the ENG switch. The patch panel drive
System forces the pre-patch panel to the right into the locked position.
Inserting the 580 Pre-Patch Panel
3 the locking system and forces the Pre-patch panel to the
agi wt -
a
1s located on the 580
] in which the various
SYSTEM INTRODUCTION
= ce
CHAPTER 1
SYSTEM INTRODUCTION
(P00 through P09)
_ Used to set manually operated attenuators.
Table 1.2. Operating Mode Functions
Control Function | Refer to:
PP Analog Mode Provides for control of IC and OP modes from | Chapter 3
patch panel.
‘IC (Initial Condition) Used to manually control the IC bus. Chapter 3
HD (Hold) This switch, when depressed, removes the Chapter 3
computer from the PP, IC, or OP modes.
OP (Operate) Manually controls the operate mode of the Chapter 3 _
computer.
SP Get Pot) Switches computer to Set Pot mode permitting Chapter 3
the setting of potentiometers,
ST (tatic Test) Switches computer to static test mode to per- Chapter 3
mit checking computed levels at various points
in the program
RMT (Remote) This switch, when depressed, permits analog Chapter 3
mode selection from an external device.
POWER-OFF/ON Controls ac power to computer. Chapter 8
Patch Panel-DIS/ENG Activates the motorized patch panel engaging Chapter 8
and disengaging system.
Time Scale - 18/2Mx Permits selection of integrated time scales. Chapter 3
Timer A/A Provides for adjustment of OP(A) and IC(A) Chapter 3
; Switching rate.
ADDRESS Permits selection of any component capable Chapter 4
of being addressed for readout purposes. :
RDAC Permits entering the desired pot coefficient Chapter 5
to the addressed pot.
SET Connects servo amplifier to pot setting drive Chapter 5
system, | ;
| CL (Clear) Disconnects servo amplifier from pot oe Chapter 5
drive system. : =| |
| [
ATTENUATORS i
Pot Control
Used to set Uaeleet ee cn at ebaired value
sathout using RDAC, :
| out on the VM.
vides for Zelection ot voltages
Seunateniamenstnensacsbabiteeceee- seca a
SSS Se ae
SYSTEM INTRODUCTION
1.5 RECOMMENDED TEST EQUIPMENT
eliability. How-
The 580 Analog/Hybrid Computing System provides long term accuracy and F
s must be periodi-
ever, to maintain the equipment at peak performance, some of the component
cally calibrated. Pertinent performance checks and adjustment procedures are provided in the
succeeding chapters of this manual, and the computing components manual (as applicable). It is
important to note that the computer cannot be more accurate than the equipment used for cali-
bration, plus the accumulated tolerances of the components and the test equipment. Therefore,
it is essential that the test equipment meets the minimum standards specified in the fol
paragraphs.
lowing
Types of Equipment:
1. Precision Voltmeter. A voltage measuring instrument is essential for component
calibration. A device recommended for this purpose is frequently known as a null
_voltage test set. It incorporates a precision six-place voltage divider and a null
sensing galvanometer (or the equivalent). Some units may also include a standard
reference cell or power supply. Of course, a separate voltage divider and galvano-
_ meter may be combined to accomplish the same function if the voltage divider is
sufficiently accurate and the galvanometer has the required sensitivity. In any case,
the device must have an absolute accuracy of +0. 01% of full scale, and have a re-
solution of 0.005% of full scale. A differential null meter such as the Keithley,
Model 662 or the Fluke, Model 825 is recommended by EAI experience, but any
instrument meeting the accuracy and resolution requirements may be used.
Multimeter. A multimeter, VOM or VTYM is useful for troubleshooting. Any unit
having a sensitivity of at least 10,000 ohms per volt for de measurements may be
The resistance range of a multimeter may be used effectively to locate cir-
alts and to perform rudimentary checks of diodes and transistors. The ohm-
should not have a voltage greater than 1.5, since a higher voltage may
the semiconductors. Typical of the instruments that may be used are
|630 or the Simpson, Model 260.
: along with direct coupled vertical amplifiers.
Juirements is the Tektronix 545A with Type CA
) aplifiers.
ortion, fairly uniform output
veral check procedures.
_ these requirements.
BRenmenmnmrtenrmrFrrPrFrereprmreireirerprwereme®PrR wT
Triangular-Wave Generator. Checking the sine-cosine tray requires the use of a
triangular-wave generator such as the Wavetek 103.
Digital Voltmeter. The 580 is equipped with a digital voltmeter that may be used for
many checks and adjustments. The internal DVM is slaved to computer reference.
This improves the accuracy of the DVM for computing functions (if the computer refer-
ence deviates slightly from its absolute value, the DVM shifts in the same direction,
thus cancelling any apparent error). However, this renders the DVM less accurate
for absolute measurements if the computer reference differs at all from 10. 000 volts.
Therefore, an external DVM is very useful for many procedures, and if sufficiently
precise, can be used to replace the precision voltmeter listed in Item 1.
§ APPENDIX 1
= REPLACEABLE PARTS LISTS
This appendix contains Replaceable Parts Lists for the equipment described in this chapter. In
each case, a brief description of the part, the EAI part number and, where applicable, a refer-
ence symbol (schematic designation) is included, To enable a particular sheet to be readily lo-
cated, an index precedes the individual replaceable parts lists.
The category column indicates the availability of each part so that a replacement can be obtained
as quickly as possible.
Category "A" - The parts in category ''A' are standard electronic items that are usually avail-
able from any commercial electronic supplier.
Category "B''- The parts in category 'B" are proprietary items that are available only from EAI.
ne
———
If proprietary items are replaced with items ob-
| tained from other sources, EAI cannot assume
z responsibility for a unit not operating within its
published specifications.
) : ORDERING INFORMATION
wi To expedite your order for replacement parts the procedures below should be followed:
—
:
I
—
iby Specify the EAI part number and description of the part required. The model number and |
serial number of the next higher assembly should also be included.
NOTE ;
EAI is currently revising the part numbering sys-
tem. All parts effected by this revision are iden-
tified using the new and the old number (the number
in parenthesis). All parts should be ordered using
the new number. The old number is provided to
cross reference parts that may still be identified
physically, or in other publications by that number.
2. When ordering complete assemblies (networks, printed circuit cards, etc.
model and serial numbers of the equipment the assembly is to be used with.
include the purchase order number or the EAI project number of the or:
purchased. number or the EAI project number of the or
'
PARTS LIST INDEX
Page
Title
9. 0134 580 Computer (Operating Equipment) .....--esseeeetereeretee®
ae 1-22
0. 12.1609 Trunk Tray .
. A 1-22
. 0.12. 1610 Trunk Card ....... 0... cccccecceceeee onc orS aa seeeee
0.19. 0263-1 Test Cable aa
eer ernm eee aes 1-22
ITEM
DESCRIPTION
REF. DESIG, EAI NO, *CAT.
1 Amplifier (Potted) 00 006.0681-1 B
2 PATCH CORD KIT: c/o 00 100.0281-0 B
35 each - Horizontal Plug: 4 Prong 00 005.0172-0 B
12 each - "T" Bottle Plug: 2 Prong 00 005.0173-0 B
30 each - Horizontal Plug: 2 Plug 00 005.0174-0 B
20 each - Cable 6" - Black 00 510.0043-0 B
30 each - Cable 12" - Brown 00 510.0043-1 B
20 each - Cable 18" - Orange 00 510.0043-2 B
10 each - Cable 30" - Blue 00 510.0043-3 B
6 each - Connector 00 542.0605-0 B
3 Contact Sp