COMDYNA GP-6 - Page 8

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OPERA

TOR'S

&

MAINTENANCE

MANUAL

page

6.

2.2

X

ADDRESS

The

X

ADDRESS

switch

is

an

11

position,

1

pole

rotary

switch.

It

selects

amplifier

outputs,

the

internal

time

base

(TIME)

and

the

compute

time

output

(CTP.)

Its

wiper

is

connected

to

the

rear

terminal

X

OUTPUT

and

the

GND/X

position

of

the

Y/POT

ADDRESS

switch,

pot

selector

section.

2.3

MODE

CONTROL

The

following

system

integrator

modes

are

controlled

with

the

four

mode

control

push

buttons.

2.3.1

Initial

Condition

Depression

of

the

IC

push

button

pulls

the

OP

bus

to

ground

for

reset

of

system

integrators.

2.3.2

Hold

Depression

of

the

HD

push

buttons

pulls

the

OP

bus

to

a

hold

mode

control

voltage

level

(approximately

-2

volts)

for

placement

of

system

integrators

into

a

hold

mode

condition.

2.3.3

Operate

Depression

of

the

OP

push

button

releases

the

OP

bus

to

an

operate

mode

control

level

(-5

to

-15

volts)

for

placement

of

system

integrators

into

a

slow

time,

operate

condition.

2.3.4

Repetitive

Operation

Depression

of

the

RO

push

button

de-energizes

the

integrator

time

scale

relays

and

connects

the

OP

bus

to

the

repetitive

operation

timing

unit

mode

control.

Integrator

time

constants

are

reduced

by

a

factor

of

400

and

mode

control

is

repetitively

switched

from

initial

condition

to

operate.

2.4

MODE

SELECTOR

The

MODE

SELECTOR

switch

is

a 2

position,

12

pole

rotary

switch.

It

selects

the

following

functions

to

distinguish

between

the

computer's

POT

SET

and

OPR

modes.

2.4.1

Setting

of

Coefficient

Potentiometers

The

top

end

input

to

each

coefficient

potentiometer

is

connected

to

one

of

eight

poles.

In

the

OPR

position,

the

poles

are

switched

to

the

patch

panel

input;

in

POT

SET,

the

poles

are

switch

to + 1 O

volts.

Thus

in

the

pot

set

mode

the

inputs

to

all

potentiometers

are

replaced

by

computer

reference

and

the

potentiometer

output

values

are

measurements

of

the

settings.

2.4.2

Internal

Digital

Voltmeter

One

pole

is

connected

to

the

DVM

input.

In

POT

SET,

the

pole

is

switched

to

the

Y/POT

ADDRESS

switch

wiper,

pot

selector

section;

in

OPR

the

pole

is

switched

to

the

rear

terminal

METER

INPUT.

2.4.3

Integrator

Mode

Control

One

pole

is

connected

to

the

rear

terminal

OP

OUTPUT.

In

POT

SET,

the

pole

is

switched

to

ground;

in

OPR

the

pole

is

switched

to

the

push

button

mode

control

switch

selection.

Thus

in

the

pot

set

mode,

all

integrators

are

placed

into

an

initial

condition

state;

in

the

operate

mode,

all

integrators

are

controlled

by

the

push

button

selections.

2.4.4

Compute

Time

Period

Amplifier

Two

poles

are

used

to

program

the

CTP

amplifier,

shown

in

Figures

2-1

and

2-2.

The

CTP

amplfier

is

a

part

of

the

Timer

PC

board

assembly.

-----------------------------------COM

DYNA,

INC.