Gates Criterion 80 User manual

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>

1

MONAURAL

IN

DESK

MOUNT

/

*•

P

STEREO

IN

RACK

MOUNT

CRITERION

80

i

-

r

L-

1

J

a

PRELIMINARY

INSTRUCTION

BOOK

CRITERION

80

INTRODUCTION

CRITERION

80

is

a

fully

NAB

compati le

tape

cartridge

system.

The

many

features

and

options

provide

a

model

for

every

application.

o

PROPRIETARY

NOTICE

This

document

contains

proprietary

data

of

the

Gates

Radio

Company.

'

No

disclosure

or

reproduction

of

any

part

thereof

may

e

made

without

written

permission.

888-1080-001

ii

i

I

TABLE

OF

CONTENTS

i

SECTION

PAGE

INSTALLATION

1

2

OPERATION

THEORY

OF

OPERATION

3

o

4

TECHNICAL

DATA

5

MAINTENANCE

§

ADJUSTMENT

6

SCHEMATICS

7

PARTS

LIST

©

iii

1-3

1-4

2-1

2-3

Bias

Adjustment

Cue

Record

Levels

Head

Alignment

Head

Replacement

Emergency

Adjustments

Deck

Adjustments

Maintenance

Check

Lists

Play ack

Record

Amplifier

Remote

Controls

Record

Amplifier

Play ack

5-1

5-4

5-6

5-9

5-17

5-19

5-25

3-1

3-6

3-11

External

Connections

-

Record

External

Connections

-

Play ack

SECTION

1

INSTALLATION

UNPACKING

AND

INSPECTION

1.1

Remove

all

packing

material

and

carefully

lift

the

units

from

the

oxes.

Check

the

equipment

against

the

packing

slips.

Install

the

relays

according

Visually

inspect

the

to

the

enclosed

set-up

sheet.

units

for

any

apparent

damage

and

for

missing

or

Check

for

proper

operation

of

loose

components

.

the

front

panel

controls.

Any

claims

for

damage

should

e

filed

promptly

with

the

transportation

If

such

claims

are

to

e

filed,

all

agency.

packing

material

must

e

retained.

o

INSTALLATION

PROCEDURE

1.2

1.2.1

GENERAL

The

location

in

an

individual

station

will

e

determined

y

the

arrangement

of

the

main

control

The

placement

of

equipment

and

room

facilities.

wiring

should

e

planned

carefully

efore

any

Care

should

e

installation

work

is

started.

taken

to

provide

for

adequate

ventilation.

PLAYBACK,

MONOPHONIC

1.2.2

Connect

a

two-conductor

shielded

ca le

etween

the

desired

audio

console

input

terminals

and

the

600

ohm

program

output

terminals

3

and

5

of

Play ack

The

shield

of

the

ca le

should

e

connector

J2.

o

connected

to

terminal

1.

See

Figure

1.2.

1-1

PLAYBACK,

STEREOPHONIC

1.2.3

Connections

for

the

Stereo

Left

channel

are

the

same

as

for

monophonic

audio

channel.

The

Stereo

Right

channel

is

connected

to

terminals

4

and

6

with

2

for

connection

to

the

shield.

Phasing

should

e

carefully

o served.

Terminals

1-3-5

are

identical

to

terminals

2-4-6

respectively.

See

Figure

1.2.

PLAYBACK-RECORD

MONOPHONIC

OR

STEREO

1.2.4

Install

tiie

Play ack-Amplifier

interconnecting

ca le

etween

connectors

J3

of

the

Play ack

and

J3

of

the

Recording

Amplifier.

Connect

the

audio

input

(monophonic

or

stereo

Left

channel)

to

terminals

3

and

5

of

JI

with

the

shield

connected

o

to

terminal

1.

For

stereophonic

installations,

connect

the

Right

channel

audio

to

terminals

4

and

6

of

JI

and

the

shield

to

terminal

2.

See

Figure

1.1.

1.2.5

REMOTE

CONTROL

CONNECTIONS

All

control

functions

of

oth

the

Play ack

and

Record

amplifier

units

may

e

remote

controlled.

See

charts

1.2

and

1.1

for

proper

connections.

Q

1-2

$3

|

o

©;

FIG.

1-1

EXTERNAL

CONNECTIONS

RECORD

AMPLIFIER

CONNECTOR

JI

FUNCTION

TERMINAL

Shield

Ground

1

Monophonic

(or

Left

stereo)

audio

input

3

5

Shield

Ground

2

Right

stereo

audio

input

(if

used)

4

6

CONNECTOR

J

3

For

Play ack

interconnecting

ca le.

CONNECTOR

J

2

1

2

Remote

Record

Set

Remote

Set

indication

3

Remote

Secondary

Tone

keying

5

8

Remote

Tertiary

(auxiliary)

Tone

keying

78

4-6-9-10

No

connection

1-3

l

-T;1

■

t

*

1

J3

©

n

©

©•

-

•••

-;?ij

.*

'//I,

>

■■

$

a

i

J3

J

1

CATES

RADIO

COMRAHY

©

0

©

FIG.

1-2

EXTERNAL

CONNECTIONS

PLAYBACK

CONNECTOR

JI

TERMINAL

FUNCTION

Remote

RUN

indication

1

2

Ground

1

2

Remote

Start

3

4

5

Remote

Stop

(see

Note

1)

6

7

Auxiliary

Start

(closed

momentarily

as

unit

starts)

10

11

Auxiliary

Switching

(closed

momentarily

y

Secondary

tone)

12

Auxiliary

Switching

(closed

momentarily

13

y

Tertiary

tone)

14

3

Remote

READY

indication

Remote

Tertiary

cue

indication

15

1

Remote

Secondary

cue

indication

1

9

1-4

U.S.

PATENT

NO.

3,059,063

I

S

rasa

Bra

ra

S

ra;ra

Si

era

S

rasa

CONNECTOR

J2

Shield

Ground

1

Monophonic

(or

Left

stereo)

audio

3

5

output

Shield

Ground

2

Right

stereo

audio

output

(if

used)

4

6

CONNECTOR

J3

Record-Amplifier

connecting

ca le.

These

terminals

are

strapped

together

(on

NOTE

1.

the

ack

of

the

connector)

at

the

factory.

Remove

this

strap

if

the

REMOTE

stop

facility

is

used.

1-5

SECTION

2

OPERATION

o

RECORDING

2.1

RECORDING

AMPLIFIER

CONTROL

FUNCTIONS

2.1.1

The

Recording

Amplifier

gain

control

GAIN

CONTROL:

AT-1

is

used

for

adjusting

the

recording

level

as

indicated

y

the

VU

meter

Ml.

Corresponding

AT2

and

M2

are

for

the

Right

channel

on

stereo

models.

The

Record

Set

push utton

switch

(SET)

RECORD

SET:

is

used

for

placing

the

system

in

the

recording

mode

.

The

Secondary

Cue

push utton

switch

SECONDARY

CUE:

(SEC)

is

used

for

keying

the

150

cycle

tone

o

generator.

TERTIARY

(AUXILIARY)

CUE:

The

Tertiary,

or

auxiliary,

Cue

push utton

switch

(TER)

is

used

for

keying

the

8000

cycle

tone

generator.

RECORDING

PROCEDURE

2.1.2

or

more

productions

is

as

follows:

Insert

a

ERASED

tape

cartridge

into

the

right

a)

side

of

the

cartridge

slot

in

the

Play ack

unit.

Note

that

the

STOP

indicator

is

illuminated,

indicating

the

cartridge

is

properly

placed.

)

Momentarily

press

the

RECORD

SET

switch.

The

o

2-1

switch

will

e

illuminated

y

the

internal

pilot

lamp

.

The

procedure

for

recording

one

Adjust

the

INPUT

CONTROL

so

the

program

level

c)

o

reads

0

(zero)

on

the

VU

meter

on

the

most

intense

program

peaks.

Press

the

START

switch

on

the

Play ack

unit

d)

and

start

recording

immediately.

Upon

completion

of

the

recorded

production,

e)

momentarily

press

the

STOP

switch

only

if

more

than

one

production

is

desired

on

the

same

If

only

one

production

is

to

e

used

cartridge.

on

the

cartridge,

allow

the

tape

to

continue

running

until

it

is

stopped

y

the

automatic

cue

tone

.

f)

single

tape

cartridge,

follow

the

procedure

listed

p

for

each

recording.

Upon

completion

of

the

final

recorded

production,

allow

the

tape

to

continue

running

until

it

is

stopped

s.

y

the

automatic

cue

tone.

The

1000

Hz

Primary

cue

tone

is

recorded

automatically

at

the

eginning

of

the

recording.

If

the

Tertiary

tone

is

to

e

used,

it

may

e

applied

at

any

time

during

the

recording.

If

the

Secondary

(end

of

message)

tone

is

used,

it

should

e

applied

immediately

after

the

end

of

the

program

material.

If

desired,

the

Secondary

and

Tertiary

tones

may

e

inserted

after

the

message

has

een

completely

2-2

in

Steps

c

thru

e

When

recording

more

than

one

production

on

a

This

permits

monitoring

and

accurate

recorded.

o

placement

of

the

tones.

2.2

PLAYBACK

2.2.1

CONTROL

FUNCTIONS

The

START

switch

causes

the

control

START

-

RUN

:

circuits

and

the

solenoid

to

e

energized;

and

the

tape

to

e

set

in

motion.

This

switch

is

illuminated

y

an

internal

lamp

when

the

tape

is

running

in

either

the

Play ack

or

Record

mode.

The

STOP

switch

is

used

to

manually

STOP-READY:

stop

tape

motion.

This

switch

is

illuminated

y

an

internal

lamp

when

a

cartridge

is

properly

inserted

and

the

Play ack

is

in

the

READY

mode.

o

The

ON-OFF

switch

applies

power

to

the

ON-OFF:

A

red

pilot

lamp

is

illuminated

entire

unit.

when

the

unit

is

on.

The

Program

Gain

controls

are

PROGRAM

GAIN:

and

are

used

for

mounted

on

the

main

chassis,

The

Right

adjustment

of

program

output

level.

Gain

Control

is

not

used

in

monophonic

units.

CUE

SENSITIVITY:

PLAYBACK

PROCEDURE

2.2.2

The

procedure

for

routine

on-the-air

play ack

of

program

material

is

as

follows:

2-3

The

Cue

Sensitivity

controls

are

*

mounted

on

the

respective

circuit

cards.

Insert

a

recorded

tape

cartridge

into

the

right

a)

side

of

the

cartridge

slot.

)

O serve

that

the

STOP-RLADY

switch

is

illuminated,

indicating

the

cartridge

has

een

properly

inserted,

and

that

the

unit

is

ready

for

on-the-air

play ack.

c)

Momentarily

press

the

START

switch.

Tape

motion

will

e

started

and

will

continue

until

the

automatic

cue

tone

is

picked

up

y

the

cue

head

and

the

unit

will

stop

in

the

correct

position

for

the

o

2-4

THEORY

OF

OPERATION

SECTION

3

GENERAL

3.1

PLAYBACK

UNIT

3.1.1

The

asic

CRITERION

80

Play ack

unit

is

a

solid

state

single-tone

cue

machine

availa le

in

slide-

out

rack

panel

mounting

or

trimline

desk

console

in

either

monophonic

or

stereophonic

versions.

Second

and

third

tone

operation

is

optional.

All

versions

of

the

CRITERION

80

equipment

meet

NAB

specifications

and

offer

24

volt

DC

external

switching

for

safety

in

remote

starting

applica



tions,

and

adapta ility

to

automated

systems.

Electronics

are

of

plug-in

design;

including

relays,

circuit

cards,

front

panel

switch

o

assem lies

and

external

connections.

The

high

quality,

laminated

heads

are

uilt

with

an

all

metal

face

providing

for

long

wear

and

low

oxide

accumulation.

Improved

solenoid

action

and

shock

mounted

relays

contri ute

to

the

quiet

operation

of

the

unit,

and

the

proven

full-swing

pressure

wheel

linkage

makes

actual

studio

operation

easy

and

fool-proof.

heavy-duty

tape

transport

with

its

hysteresis

synchronous

positive

speed

direct

capstan

’

drive

3-1

o

The

heart

of

the

CRITERION

80

Play ack

unit

is

a

The

CRITERION

80

tape

transport

offers

motor

.

speed

accuracy

compara le

to

the

finest

reel-to-

reel

machines.

Sealed

precision

instrument

type

all

earings

are

used

making

transport

flutter

less

than

.25

rms

.

Plug-in

printed

circuit

oards

offer

the

finest

in

advanced

solid

state

design.

Top

quality

epoxy

glass

oard

construction

is

used

throughout

for

easy

component

access

should

maintenance

e

required

.

A

regulated

power

supply

is

used

to

power

all

circuits

assuring

correct

operating

parameters

and

relia le

operation

at

all

times.

POWER

CONTROL

BOARD:

This

card

contains

the

o

solenoid

power

supply

and

relay

as

well

shot

relay

driver

for

an

external

The

capstan

motor

may

e

connected

to

output.

run

continuously

or

to

e

switched

y

the

deck

micro



switch.

Suppressor

network

R3

and

C2

may

e

connected

across

the

deck

microswitch

or

may

e

connected

across

the

line.

Diodes

CR1

and

CR2

,

together

POWER

SUPPLY

CARD:

with

Cl,

form

the

positive

power

supply

which

is

applied

to

QI

and

Q2

in

a

compound

connected

series

Diode

CR3,

with

R1

and

C4

,

form

the

regulator.

3-2

’

au iliary

start

”

as

a

one-

current

limited

and

filtered

negative

supply

of

o

approximately

8

volts

used

for

reverse

ias

switching

in

the

Record

unit.

Resistors

R4

and

R5

provide

forward

ase

ias

to

QI,

which

is

regulated

at

24

volts

y

zener

diode

CR4.

Capacitor

C2

operates

as

a

pre-filter

for

QI

and

as

a

delaying

network

to

prevent

high

surge

currents

through

QI

and

Q2.

Resistor

R2

limits

the

emitter

current

of

QI

and

the

ase

drive

of

Q2

for

high

current

or

short

circuit

protection.

Fl

is

a

quick

acting

instrument

type

fuse

to

assure

protection

for

the

power

supply

in

case

of

shorts

.

At

this

point

the

voltage

is

+23

volts

and

is

further

filtered

y

R3

and

C3

to

supply

o

the

program

amplifier

cards.

Transistors

QI

and

Q2

are

PROGRAM

AMPLIFIER:

connected

as

a

oot-strap

amplifier

for

high

DC

sta ility.

C3,

R2

,

and

R9

provide

equalization,

fixed

for

low

frequencies

of

the

NAB

curve

and

adjusta le

at

high

frequencies

to

compensate

for

head

losses

and

allow

the

choice

of

operating

curves

to

match

3-3/4,

7-1/2,

or

15

IPS

require-

R1

and

R4

provide

local

AC

feed ack

for

ments

.

these

stages

to

increase

AC

sta ility.

control

as

an

input

load.

R14

and

R12

provide

3-3

Q3

is

a

medium

impedance

amplifier

matching

the

gain

feed ack

for

AC

sta ility.

Q4

is

a

Class

A

o

impedance

matching

output

amplifier

working

into

line

transformer

Tl.

switch

to

allow

operation

from

the

+23

volts

The

LDR

provides

a

slight

delay

in

the

supply.

output

of

the

program

amplifier

to

suppress

start



up

noises.

1

kllZ

PRIMARY

CUE:

QI

and

Q2

comprise

a

road and

amplifier

to

provide

high

input

impedance

and

high

current

gain

suita le

for

driving

all

the cue

sensors,

which

are

compounded

AC

feed



ack

for

Q2

is

provided

y

R5.

Signal

is

coupled

to

the

cue

gain

control

R7

,

where

cue

sensitivity

for

the

1

kHz

sensor

is

set.

C7

allows

low

fre



quency

degeneration

for

Q3,

C8

provides

high

frequency

limiting

action.

Q4

is

a

similarly

tuned

stage;

the

result

is

a

passive

two-stage

amplifier

at

1

kHz,

with

roll-off

on

either

side

at

approximately

12

dB

per

octave.

Q5

and

Q6

signal

rectifier

and

DC

amplifier,

Q6

is

Q9

is

a

relay

driver

and

is

o

ridging

network.

normally

in

saturation

through

ias

resistors

R21

When

a

cue

signal

and

R29

to

the

positive

supply.

3-4

)

o

R19

is

a

voltage

dropping

resistor

for

the

lamp

element

of

the

LDR

audio

operate

as

a

with

C13

providing

a

delaying

action.

connected

to

the

ase

of

Q9

through

a

resistance

as

a

load.

is

detected,

Q6

will

remove

the

drive

from

Q9

and

o

cause

relay

KI

to

drop

out;

provided

that

Q7

is

not

conducting.

The

time

delay/protect

circuit

receives

run

voltage

from

relay

KI

through

R33.

C14

charges

through

R32

to

the

avalanche

voltage

Q10

conducts,

providing

a

of

uni-junction

Q10.

gate

signal

for

Qll;

which

fires,

latches,

and

drops

its

anode

voltage

across

R33

nearly

to

zero.

During

this

timing

interval

Q8

is

ON

holding

Q7

ON,

which

holds

Q9

ON.

In

this

way

Q9

can

not

e

turned

OFF

y

a

cue

signal

until

after

the

time

delay

cycle.

A

positive

input

to

the

ase

of

Q8,

through

R26

from

the

150

Hz

sensor

card,

provides

safety

muting

during

o

reception

of

150

Hz

tones.

R26

may

e

removed

if

this

feature

is

not

desired.

150

HZ

SECONDARY

CUE:

The

amplified

cue

signal

is

received

from

the

1

kHz

card.

Rl,

Cl

and

sensi



tivity

control

R2

form

a

low-pass

network

into

the

C14

provides

low

frequency

degeneration

ase

of

QI.

and

C3

provides

high

frequency

attenuation

for

QI.

Q2

is

in

a

similar

circuit,

resulting

in

a

passive

amplifier

with

slopes

either

side

of

center

fre



quency

of

approximately

12

dB

per

octave.

Q3

and

Q4

operate

as

a

signal

rectifier

and

DC

amplifier

for

the

relay,

with

C9

providing

a

delaying

action.

3-5

o

An

output

is

taken

from

the

collector

of

Q4

ack

the

1

kHz

card

for

safety

muting

during

o

The

relay

is

normally

the

150

Hz

operation.

returned

to

the

anode

of

Qll

on

the

1

kHz

card

to

allow

150

cycle

sensor

operation

only

after

the

protect

timer

interval

has

passed.

8

kHZ

TERTIARY

CUE:

The

amplified

cue

signal

is

received

from

the

1

kHz

cue

card.

Cl,

CIO

and

sensitivity

control

R2

form

a

high

pass

network

feeding

QI

in

this

circuit.

The

safety

and

inhi it

functions

utilized

in

the

150

Hz

card

are

not

utilized

in

this

circuit,

which

otherwise

functions

the

same

as

the

150

Hz

cue

circuit.

o

3.1.2

RECORD

AMPLIFIER

solid

state,

single-tone

cue

device

for

use

in

association

with

any

monophonic

model

CRITERION

80

Play ack.

The

Recording

Amplifier

is

also

availa le

in

slide-out

rack

panel

mounting

or

trim



line

desk

console

in

either

monophonic

or

stereo-

Second

and

third

tone

operation

phonic

versions.

Operation

on

regulated

DC

power

from

is

optional.

the

associated

Play ack

unit

assures

correct

The

printed

operating

parameters

at

all

times.

circuit

oard

mounting

of

all

components

in

the

o

CRITERION

80

Recording

Amplifier

provides

for

easy

.

3-6

to

Q8

on

The

asic

CRITERION

80

Recording

Amplifier

is

a

and

efficient

maintenance.

Pre-wired

PC

plugs

o

permit

easy

field

modification

of

any

single



tone

amplifier

to

three-tone

operation.

RECORD

AMP/METER

AMP:

Transistor

QI

is

a

common

emitter

amplifier

with

R2

providing

local

AC

C2

slightly

oosts

high

frequency

gain

feed ack.

to

compensate

for

reactive

losses

in

the

input

The

output

of

QI

feeds

oth

the

meter

network.

gain

control

(R13)

and

the

pre-emphasis

network

The

input

to

consisting

of

C5,

R6

,

C6

and

R9.

the

ase

of

Q2

is

fed

from

this

network,

and

additionally

shaped

y

C8,

C9

and

LI

to

drive

the

recording

head.

L2

and

CIO

form

a

ias

trap

to

limit

ias

on

the

collector

of

Q2.

Transistors

o

Q3

and

Q4

make

up

high

input

and

low

output

impedance

to

drive

the

meter

and

its

ridge

rectifier.

BIAS

OSCILLATOR:

Transistors

QI

and

Q2

operate

as

a

Class

AB

push-pull

oscillator,

with

transformer

T1

and

C4

as

a

tuned

load.

AC

positive

feed ack

is

provided

through

C2

and

C3.

Negative

feed ack,

for

sta ility,

is

developed

across

R2

and

RS.

Output

is

taken

from

three

taps

on

the

transformer

through

resistors

R8

,

R9

and

RIO,

which

provide

resistive

loads

and

current

limiting

while

the

switching

transistors

are

AC

grounded.

o

J

Q3,

Q4

and

Q5

are

saturated

gates

to

allow

selective

3-7

a

oot-strap

amplifier,

providing

application

of

ias

to

any

of

the

three

outputs.

o

Trimmer

C5,

C6

and

C7

provide

independent

ias

adjustments

for

each

head

section.

Diodes

CR1

and

CR2

turn

on

the

ias

oscillator

y

voltage

from

the

SET

utton

or

the

two-tone

oscillator

DC

reverse

drive,

to

open

the

card,

when

keyed.

clamping

gates,

is

derived

from

these

same

Resistor

R1

and

capacitor

Cl

voltage

sources.

filter

the

DC

power

applied

to

the

oscillator

circuit,

to

prevent

false

triggering.

This

card

includes

1

kllZ

PRIMARY

CUE

OSCILLATOR:

the

1

kHz

oscillator

and

a

timer

circuit,

which

automatically

applies

a

1

kHz

signal

at

the

start

o

of

each

recording

operation.

Transistor

QI

and

associated

components

form

a

tuna le

shunt-fed

Hartley

oscillator.

Potentiometer

R5

is

the

primary

cue

level

control,

and

serves

as

the

oscillator

load.

The

1

kHz

tone

is

coupled

into

amplifier

Q2;

the

150

Hz

tone

and

the

8

kHz

tone

are

also

fed

into

the

card

through

terminal

2

Thus,

Q2

acts

as

a

common

amplifier

into

Q2.

The

timer

section

of

the

card

gets

its

power

through

terminal

12,

which

starts

charging

CIO

o

3-8

for

all

three

tones,

which

are

then

coupled

through

the

ias

trap

to

the

cue

record

head.

Gates CRITERION 80 User manual

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