Knox Video K60 User manual

MODEL
K60
TELEVISION
TITLING
UNITS
INSTRUCTION
MANUAL
DIVISION
OF
%
VIDEQ
PRODUCTS
KNOX
VIDEO
PRODUCTS
9700-B
Palmer
Highway
Lanham,
Maryland
20801,
USA
Telephone
(301)
459-2106
Telex
89-8327


Models
K60,
KS60
and
KX60
TELEVISION
TITLING
UNITS
INSTRUCTION
MANUAL
MARCH
1979
VIDEQ
PRODUCTS
A
DIVISION
OF
Computer
Operations,
Inc.
9700-B
Palmer
Highway
Lanham,
Maryland
20801
USA

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CONTENTS
GENERAL
DESCRIPTION
Specifications
INSTALLATION
OPERATION
Adjustments
TECHNICAL
DESCRIPTION
PARTS
LIST
SCHEMATIC
DIAGRAMS
Frontispiece,
K
X60
Typical
Font
Rear
View,
K
X60
Front
View,
K
X60
Operating
Instructions
Keyboard
Internal
Adjustments
Block
Diagram
Schematic
Diagram
Component
Location
Drawing’
Chassis
Schematic
Drawing
ILLUSTRATIONS
iii
WNO
eK
i
1
1
NNADBWWW
6d 43
es
eee

pS
28
at
Bar”
Ker
beerey
Figure
1-1.
Model
KX60
Television
Titling
Unit

SECTION
|
—
General
Description
1.1
GENERAL
The
K60
Series
Television
Titling
Unit
provides
a
means
of
adding
electronically-generated
alpha-numeric
titles
to
picture
video
in
standard
television
systems.
Information
is
entered
directly
onto
the
screen
from
the
typewriter-like
keyboard
of
the
K60.
By
using
the
K60,
alphanumerics
can
be
generated
for
display
in
three
ways:
1)
by
passing
a
video
signal
through
it,
2)
by
driving
with
sync
as
a
source
of
video
for
display
of
alphanumerics
alone,
and
3)
by
mixing
with
picture
in
external
equipment
(such
as
mixers,
special
effects
generators,
etc.)
The
K60
character
alphabet
contains
64
letters,
numerals
and
symbols,
any
of
which
may
be
placed
at
any
of
up
to
512
discrete
positions
on
the
television
screen.
Memory
for
four
such
pages
is
provided
internally.
A
page
of
characters
is
formatted
into
sixteen
lines
of
32
characters.
Control
functions
allow
entry
of
information
at
any
location
on
the
page.
An
independent
video
channel
allows
composition
and
editing
on
any
one
of
the
four
pages
provided
while
the
contents
of
that
or
another
page
are
being
displayed
with
picture.
In
addition
the
the
basic
K60
model,
the
KS60
provides
internal
sync
generation
(switch
selectable)
and
the
K
X60
provides
internal
sync,
timed
page
advance,
and
a
title/crawl
mode
of
oper-
ation.
With
the
title/crawl
mode
the
K60
allows
insertion
of
as
many
as
32
independent
subtitles,
or
one
long
continuously
moving
message
in
the
lower
third
of
the
picture
area.
IS
IS
THE
K6@
FONT.
E
KNOX
K6@
IS
ORGANIZED
INTO
16
LINES
OF
32
CHARACTER
LINE
LENGTH.
THE
K6@
CHARACTER
ALPHABET
HAS
64
ELEMENTS,
ANY
OF
WHICH
CAN
BE
PLACED
AT
ANY
OF
UP
TO
Ste
DISCRETE
POSITIONS
ON
THE
TV
SCREEN.
MEMORY
FOR
FOUR
SUCH
PAGES
IS
PROVIDED
INTERNALLY.
TAGS
[Shoot
4
ABCDEFGHI
JKLMNOPQRSTUUWXYZ
1234567830
I"
8$48'
()
»,
OL
\+H2/
tet
]<>?
Figure
1-2.
Typical
Font

TABLE
1-1.
SPECIFICATIONS
EWC
oF
ese
Sneed
See
wish
Qn
lw
wee
ae
Requires
full-,
non-,
or
random-interlace
composite
video-sync
per
EIA
RS-170
or
RS-330,
at
1.0
volts
peak,
terminated
in
75
ohms.
Looping
output
provided.
WE)
PRED,
es
vowel
elae
bws
wie
ie
wee
Preview
—
1.0
volt
composite
video-sync
into
75
ohm
load;
0.3V
sync,
0.7V
character
video.
Program
—
(if
composite
video
provided)
1.0
volt
(max.)
composite
video-sync
into
75
ohm
load,
con-
sisting
of
input
video
added
at
up
to
full
white
level,
and
character
edge
subtracted
down
to
full
black
level.
DISPLAY
FORMAT
Character
Alphabet...
..
25.6
caer
gee
week
Upper
case
English
26
Numerals
10
Typewriter
Symbols
a
Space
1
Total
64
Character
Resolution.
...........25+0005
7
x
9
dot
matrix.
Nominal
Character
Height...............
18
scan
lines
PU
EINE
sia
as
a
ew
Ro
aan
eA
32
characters/line;
16
lines/page.
SAEGTTIAT
WURITIOTY
newex
ew
nee
nns
4
full
pages,
switch
selectable.
CONTROL
FUNCTIONS
Keyboard
So
Regs
20.
ocd
oe
ee
ae
Character
entry
43
Shift
2
Erase
1
Cursor
Position
6
Pause/Flash
1
Panel
Switches
Characteretreer
Oe,
«aie
oss
ere
4
hae
mene
Controls
character
video
on
program
channel
in
INSERT
position.
Page
SeleGts
¢ctess
eka.
a
Ree
oe
Laer
Allows
page
selection
via
keyboard
numerals
in
SELECT
position.
Page-Title-Crawl
(KX60)............005-
Selects
full
page
mode,
one
line
lower
third
insert,
or
horizontal
crawl
mode.
Syne
late
4h
OO...
ss
ice
5k
orcs
Shee
ea
Selects
source
of
sync
as
internal
or
external.
Page
Advanee
(KR
AGO).
...
soe
s
eee
ee
ws
Enables
timed
page
advance
feature
(time
adjustment
internal).
POWER
REQUIREMENTS..............
105-125
VAC,
50/60
Hz,
50
watts
(210-250
VAC,
50/60
Hz,
if
specified).
SIZE...
Meg
ee
rem
ete
eats
ok
Ne
oe
awh
geet
ees
15-1/4w
x
12-1/2d
x
3-1/2h.
WEIGHT
re
a
ar
ee
ck
hoe
eras
eS
8
pounds.
1-2

SECTION
2
—
Installation
21
AC
POWER
The
K60
should
be
connected
into
standard
3-wire
grounded
electrical
systems
(normally
120
V
60
Hz
but
available
in
220
V
50
Hz).
DO
NOT
USE
3-wire
to
2-wire
adaptors.
Loss
of
system
ground
could
cause
an
electrical
shock
hazard,
and
could
do
extensive
damage
to
the
K60.
mak
VIDEO
INPUTS
These
are
the
inputs
to
which
program
page
titles
will
be
added.
Connect
composite
video-
sync,
1.0
volts
p-p
(EIA
RS170,
RS330,
EIA-J,
or
similar
525-line,
60
fields/sec
standards*),
to
one
of
the
input
video
BNC
connectors
at
the
rear
of
the
unit.
A
second
input
BNC
is
available
for
looping
the
original
signal
to
other
equipment.
If
no
looping
is
required,
the
second
BNC
input
should
be
terminated
with
a
75-ohm
resistive
load.
The
K60
may
also
be
driven
from
composite
sync-only
(nominally
4.0
volts,
p-p).
When
the
K60
is
driven
with
4
volt
sync,
the
Program
channel
will
not
have
a
usable
output.
To
regain
use
of
Program
channel,
drive
the
K60
through
a
10:1
pad
while
properly
terminating
the
sync
signal
externally.
When
using
the
optional
internal
sync
(see
section
2.4)
the
sync
is
padded
internally.
2.3
VIDEO
OUTPUTS
PREVIEW
—
A
composite
signal
made
up
of
sync
regenerated
from
the
input
drive
signal
and
video
dots
representing
the
information
on
the
Preview
page
selected.
This
output
would
normally
be
connected
to
a
local
video
monitor
through
75
ohm
cable
for
composition
and
editing.
PROGRAM
—
A
composite
signal
made
up
of
the
video
input
plus
video
dots
representing
the
information
on
the
Program
page
selected.
This
is
the
Line
output,
and
is
meant
to
drive
monitors,
video
tape
recorders,
modulators,
or
video
distribution
systems
through
75
ohm
cable.
Character
level
is
adjusted
to
approximately
1.0
volts.
For
purposes
of
mixing
with
input
picture,
the
input
signal
is
assumed
to
be
composed
of
approximately
0.3
V
sync
and
0.7
volts
maximum
video.
When
the
K60
is
driven
with
sync
directly,
no
Program
output
is
available
(see
Video
Inputs).
*
625
line,
50
field
systems
if
specified
OuTeuTS
PAGE
ADVANCE
Connect
directly
to
Maniter
rs
ae
€
iz
BS
:
=
we
TIMED
Ss
crawL
UN
e
input
must
be
terminated.
PREVIEW
=
PROGRAM
Figure
2-1.
Model
KX60,
Rear
View
2-1

2.4
INTERNAL
SYNC
OPTION
(KS60
or
K
X60)
If
fitted
with
the
Internal
Syne
Option,
the
K60
has
a
toggle
switch
on
the
rear
panel
near
the
BNC
connectors
marked
INT-EXT.
In
the
EXT
position
the
K60
requires
video
or
sync
drive.
In
the
INT
position
a
circuit
inside
the
K60
generates
composite
syne
similar
to
RS170
standards.
Both
Pre-
view
and
Program
outputs
appear
as
white
characters
over
a
black
background.
2-2

SECTION
3
—
Operation
a
INITIAL
START-UP
a.
Connect
the
K60
to
a
3-wire
grounded
AC
power
line
with
the
characteristics
described
on
the
serial
number
plate
on
the
back
of
the
case.
b.
Connect
a
suitable
input
video
(or
sync)
source
to
one
of
the
Video
Input
BNC
connectors
on
the
rear
of
the
unit.
Affix
a
75
ohm
termination
at
the
looping
output
provided
or
loop
out
to
other
terminated
equipment.
c.
Connect
a
video
monitor
to
the
preview
output;
terminate
the
monitor
with
a
75
ohm
terminator.
Connect
a
monitor
or
other
75
ohm
video
input
equipment
to
the
Program
output.
d.
Move
the
Select
switch
to
its
center
position,
the
Program
ON/OFF
switch
to
its
full
up
position,
and
the
Title/Crawl
switch
(on
KX60
units
only)
also
to
the
full
up
position.
e.
Apply
power
using
the
toggle
switch
on
the
rear
of
the
K60.
i
i
le
Meee
os
al
TITLEFCRAWL
OPTION:
Top
Position
~
Full
Page
Display
Middle
Position
—-
Ling
On
which
Cursor
is
being
displayed
will
move
to
Bettom
a
(ge)
4
Ling.
To
change
tine
display,
move
Cursor
up
or
down.
Bottom
Position
—~
To
start
Crawl,
note:
Crew!
DEQ
PRODUCTS
will
continue
line-by-line
and
pege-to-page
PROGRAM
ON/OFF:
To
add
Characters
te
Program
Channel,
teave
Rocker
in
upper
position.
To
remove
display,
push
Racker
into
lower
position.
PAGE
SELECT:
Page
Number
i
selected
vie
Keyboart
Numbers.
To
select
Program
Chen-
net:
hold
Rocker
in
upper
position
while
depress.
ing
Page
Number
to
sel<
PA
ect
Preview
Channel:
Sys
on
PROG
Heald
Rocker
in
lower
:
iti
Di
-
CRAWL
4
OFF
PREY
on
eee
—
aeons
GENERAL
INSTRUCTIONS:
CURSOR:
Appears
as
a
white
rectangle
on
Preview
Monitor
only.
Lacates
Pasition
of
infarmation
Entry.
CURSOR
CONTROLS:
Dark
grey
color
Reybuard
Cantrois,
{4}
indicates
upward
morement;
{«}
{»}
side
movement;
{¥)
down;
{homes
motes
curser
into
upper
left
commer.
RETURN
moves
cursor
to
ieit
side.
TO
ENTER
INFORMATION:
Position
Cursor
at
Entry
Point
and
use
Keyboard
TO
ERASE
PAGE:
oid
Erase
Sutton
down
and
press
Space
Bar
TOALTER:
Type
corrected
Chsracter
or
Space
Sar
over
Figure
3-1.
Model
KX60,
Front
View
3-1

Suc
SELECTING
PAGES
To
select
a
PREVIEW
page,
move
the
PAGE
SELECT
switch
to
its
full
down
position
and.
depress
a
number
key
on
the
keyboard
from
|
to
4.
A
corresponding
LED
indicator
lamp
will
light.
Before
proceeding,
make
sure
the
SELECT
switch
is
in
its
center
position.
To
select
a
PROGRAM
page,
move
the
PAGE
SELECT
switch
to
its
full
up
position
and
depress
one
of
the
number
keys
from
|
to
4
—
the
page
selected
will
be
indicated
by
one
of
the
four
Program
LED’s.
PREVIEW
and
PROGRAM
may
be
operated
on
the
same
page
for
on-line
composition
or
editing.
3.3
VIDEO
INSERT
It
may
sometimes
be
desirable
to
have
the
PROGRAM
(Line)
picture
video
passed
through
the
K60
without
adding
titles.
With
the
PROGRAM
switch
OFF,
video
will
pass
directly
through
the
unit.
When
titles
are
desired,
move
the
INSERT
switch
to
ON.
3.4
TITLE
MODE
(KX60
Models
Only)
With
the
TITLE/CRAWL
switch
in
the
full
up
position,
the
K
X60
will
be
in
full
page
mode.
However,
when
using
the
KX60
for
one-line
lower
third
inserts,
each
page
can
make
up
to
8
inserts
by
using
the
TITLE
mode.
Compose
the
inserts
required
in
advance,
then
place
the
cursor
on
the
line
(one
to
eight)
that
you
wish
to
super.
Move
the
TITLE/CRAWL
switch
to
the
center
—
TITLE
—
posi-
tion.
That
line will
appear,
by
itself,
in
the
lower
third
of
the
picture
area.
To
change
titles,
exercise
the
cursor
t
or
J
controls;
the
line
you
had
placed
just
above
or
below
will
come
into
view.
Continuing
to
exercise
the
cursor
while
in
TITLE
mode
will
give
sequential
access
to
the
entire
page
of
titles.
TITLE/CRAWL
:
Top
Position
—
Full
Page
Display
Middle
Position
—
Line
On
which
Cursor
is
being
displayed
will
move
to
Bottom
Line.
To
change
line
display,
move
Cursor
up
or
down.
Bottom
Position
—
To
start
Crawl.
note:
Crawl
will
continue
line-by-line
and
page-to-page
PROGRAM
ON/OFF:
To
add
Characters
to
Program
Channel,
leave
Rocker
in
upper
position.
To
remove
display,
push
Rocker
into
lower
position.
PAGE
SELECT:
Page
Number
is
selected
via
Keyboard
Numbers.
To
select
Program
Chan-
nel:
hold
Rocker
in
upper
position
while
depress-
ing
Page
Number
to
sel-
ON
ect
Preview
Channel:
bore
BAUS
Hold
Rocker
in
lower
position
while
depress-
CRAWL
OFF
PREV
ing
Page
Number.
GENERAL
INSTRUCTIONS:
CURSOR:
Appears
as
a
white
rectangle
on
Preview
Monitor
only.
Locates
Position
of
Information
Entry.
CURSOR
CONTROLS:
Dark
grey
color
Keyboard
Controls.
(A)
indicates
upward
movement;
(<) (>)
side
movement;
(Y)
down;
(home)
moves
cursor
into
upper
left
corner.
RETURN
moves
cursor
to
left
side.
TO
ENTER
INFORMATION:
Position
Cursor
at
Entry
Point
and
use
Keyboard
TO
ERASE
PAGE:
Hold
Erase
Button
down
and
press
Space
Bar
TO
ALTER:
Type
corrected
Character
or
Space
Bar
over
Figure
3-2.
Operating
Instructions
on
Front
Panel
of
KX60
3-2

EBs:
CRAWL
MODE
(KX60
Models
Only)
A
long
message
may
be
crawled
horizontally
across
the
lower
third
of
the
frame
using
Crawl
mode.
First
compose
the
message
you
wish
to
display.
Because
crawl
messages
appear
as
a
con-
tinuous
line,
pay
no
attention
to
the
ends
of
lines
during
composition
—
do
not
hyphenate.
Be
sure
to
load
all
4
pages
in
sequence
since
crawl
will
automatically
move
from
page
to
page.*
To
start
crawl,
select
the
page
and
line
you
wish
to
start
with
by
placing
the
cursor
at
that
location.
Move
the
TITLE/CRAWL
switch
to
its
center
(TITLE)
position
to
ready
a
crawl,
then
move
the
switch
to
full
down
when
you
wish
to
start
the
crawl
motion.
Crawl
may
be
stopped
momentarily
by
depressing
the
PAUSE
(FLASH)
key
on
the
keyboard.
Crawl
is
sometimes
more
effective
when
starting
with
a
blank
screen.
If
desirable,
start
your
crawl
on
a
line
filled
with
space
characters.
To
avoid
long
blank
spaces
when
displaying
a
repeated
mes-
sage,
type
the
same
message
several
times
in
the
four
pages
of
display.
To
stop
crawl,
move
the
switch
back
to
the
center
(TITLE)
or
full
up
(PAGE)
position.
3.6
KEYBOARD
CONTROLS
The
Keyboard
contains
display
control
keys,
cursor
control
keys,
and
character
entry
keys.
*Jumpers
permit
crawling
one
page
only.
Figure
3-3.
Keyboard
of
K60
Showing
Keycap
Legends
3-3

3.6.1
Display
Control
ERASE
is
a
two-key
function.
To
erase
an
entire
page,
hold
ERASE
down
and
depress
the
space
bar.
To
erase
a
single
character,
place
the
cursor
under
it
and
depress
the
space
bar.
The
ERASE
key
may
also
be
used
to
fill
the
entire
picture
area
with
any
keyboard
character
by
depressing
the
ERASE
key
and
then
a
character
key.
3.6.2
Cursor
Control
In
composing
a
page,
it
is
important
to
be
able
to
move
the
cursor
freely
without
erasing
characters.
Six
keys
on
the
right
side
of
the
keyboard
are
available
to
position
the
cursor.
HOME
sends
the
cursor
to
the
upper
left
corner
of
the
frame.
RETURN
sends
the
cursor
to
the
extreme
left
of
what-
ever
line
it
ison.
The
directional
arrows
send
the
cursor
one
space
at
a
time
in
the
direction
indicated.
3.6.3
Character
Entry
Forty-three
keys
are
available
for
entry
of
information
on
the
screen.
To
type
a
character,
depress
the
appropriate
key
—
the
character
will
appear
in
the
position
just
above
the
cursor
and
the
cursor
will
advance
one
space.
At
the
end
of
a
line
the
cursor
will
move
to
the
next
line
down.
To
change
a
character,
place
the
cursor
under
it
and
type
the
correct
character.
The
space
bar
behaves
ex-
actly
as
any
other
character
key.
The
numeral
keys
and
certain
alphabet
keys
have
a
second
legend
on
the
keycap.
These
characters
are
available
by
depressing
one
of
the
SHIFT
keys
while
typing.
3.6.4
Flash
Key
Any
character
or
series
of
characters
may
be
made
to
flash
on
and
off
at
the
rate
of
3-3/4
times
per
second.
To
enter
a
flash
code
hold
the
FLASH
key
down
when
typing
the
character.
Ifa
character
has
already
been
typed,
position
the
cursor
under
it,
hold
the
FLASH
key
down
and
re-type
the
letter.
3.7
Timed
Page
Advance
(KX60
Only)
With
this
factory-wired
option,
the
KX60
will
automatically
change
pages
at
adjustable
intervals,
from
one
to
ten
seconds.
With
the
rear
panel
switch
in
ADV,
both
PREVIEW
and
PROGRAM
change
at
the
selected
interval
to
the
next
higher
page,
going
back
to
page
|
after
page
4
is
displayed.
See
Adjustments
Section
for
location
of
interval
control.
3.8
ADJUSTMENTS
a.
Preview
Balance
(R20)
Adjust
for
correct
ratio
of
sync
to
video
(3
to
7)
on
the
Preview
output
when
terminated
in
a
75
ohm
load.
b.
Video
Gain
(R16)
Adjust
for
1
to
1
ratio
of
input
picture
video
to
output
picture
video
on
Program
output
when
terminated
in
a
75
ohm
load
using
waveform
monitor
or
oscilloscope.
c.
Character
Level
(R14)
Adjust
for
1.0
volt
Program
character
output
when
mixed
with
a
properly
adjusted
video
picture
input.
3-4

d.
Character
Shadow
(R15)
Adjust
shadow
level
to
black
level
on
Program
output
when
terminated
in
a
75
ohm
load
using
waveform
monitor
or
oscilloscope.
e.
Character
Width
(R29)
Adjust
for
width
of
display
which
fits
within
your
safe
title
area
of
picture.
f.
Horizontal
Margin
(R4)
Adjust
to
center
display
line
within
your
title
area.
g.
Timed
Page
Advance
(R3)
(KX60
Only)
Adjust
to
desired
page
advance
time
(approximately
|
to
10
seconds).
HORIZONTAL
DELAY
CHARACTER
LEVEL
SHADOW
LEVEL
PROGRAM
GAIN
MASTER
CLOCK
FREQUENCY
ADJUST
PREVIEW
AMPLITUDE
Ww
ow
a
O
2
Od
>
=O
a4
Figure
3-4.
Internal
Adjustments
3-5

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SECTION
4
—
Technical
Description
4.1
GENERAL
The
K60
circuitry
is
made
up
of
four
basic
sections:
Video,
Character
Generation,
Memory
and
Timing.
The
Crawl/Title
option
(Model
K
X60)
adds
a
fifth
basic
section,
the
crawl/title
timing
circuitry,
to
the
unit.
VIDEO
SECTION
SYNC
SYNC
PREVIEW
COMPOSITE
VIDEO
VIDEO
STRIPPER
VIDEO
PREV
OUT
CHARACTER
COMPOSITE
PICTURE
VIDEO
BIT
STREAM
COMPOSITE
VIDEO
et
PROGRAM
PROG
OUT
pt
MIXER
.)
CHARACTER
GENERATION
+
Reinet
RS170
SYNC
hey
sci
GENERATOR
KS60
and
KX60
only
CONVERTER
CONVERTER
MEMORIES
ae
Ba
BCD
BITS
PAGE
TIMED
PAGE
ADVANCE
KEYBOARD
}
ADDR
CHAR
SCAN
LINE
eae
Bs
SYSTEM
aca
(KX60
only)
Ly
H
SYNC
H
BIT
RATE
RATE RATE
RATE
R
y—_LV
SYNC
BIT
CTR
gt
LINE
CTR
CONTROLS
TIMING
CRAWL/TITLE
TIMING
(KX60
only)
Figure
4-1.
Model
K60
Block
Diagram
4.2
VIDEO
SECTION
Video
processing
in
the
K60
involves
a
sync
stripper
(U53),
vertical
integrator
(Qll),a
circuit
to
synthesize
preview
video
(Q9)
and
means
to
add
titles
to
input
video.
In
adding
titles
to
existing
video,
first
a
wider
version
of
each
character
is
subtracted
from
the
video
signal,
making
a
black
cutout
(Q6,
7).
Then
the
characters
are
added
back
as
white
letters
with
a
black
background
(Q4,
5).
4.3
CHARACTER
GENERATION
A
character
bit
stream
(CBS)
is
generated
for
each
scan
line
of
each
character
on
the
screen.
The
ASCII
code
for
each
character
is
presented
in
turn
to
the
Read-Only-Memories
(U1
—
Preview,
U2
—
Program).
Scan
lines
are
counted
on
the
chip
(US1,
52);
clock
and
load
signals
(U15,
23)
deter-
mine
the
timing
and
rate
of
the
CBS
to
be
delivered
to
the
Video
Section.
4-1

4.4
MEMORIES
Four
memory
IC’s
(U9-11)
of
128
characters
each
are
multiplexed
to
provide
four
full
pages
of
display.
Page
selections
are
made
in
the
page
registers
(U19,22)
and
multiplexed
to
the
mem-
ories
for
(first)
PROGRAM
and
(second)
PREVIEW
readout.
Information
is
entered
into
the
PREVIEW
page
by
a
write
pulse
generated
in
the
Entry
cir-
cuitry
(U18,
20,
41,
45,
47),
based
on
the
position
of
the
cursor
(U34,
35, 39,
40,
46,
47).
Erase
(or
full
field
of
characters)
is
accomplished
by
writing
an
entire
page
at
once
(U20).
In
models
equipped
with
TITLE/CRAWL,
a
digital
adder
is
employed
to
provide
smooth
transition
from
one
page
to
the
next
during
CRAWL
(U17).
4.5
TIMING
SECTION
Character
display
must
be
synchronized
to
the
input
video
frame.
The
Video
Section
pro-
vides
a
horizontal
margin
(U50)
and
vertical
delay
(U51,
52)
referenced
to
input
video.
A
character
bit
rate
(U56)
is
divided
by
10
to
provide
basic
character
timing.
Thirty-two
characters
per
line
(U61,
62)
produce
an
end-of-scan
(EOS),
reset
at
each
H
pulse.
A
counter
establishes
both
active
display
area
and
the
space
in
between
rows
of
characters.
(U59).
Each
full
character
height
advances
the
line
counter
(U65)
one
count
until
an
end-of-field
signal
holds
further
display
until
reset
by
the
next
verti-
cal
sync
pulse.
4.6
TIMING
SECTION
—
TITLE/CRAWL
An
auxiliary
set
of
counters
is
available
in
units
equipped
with
Title/Crawl
mode.
These
reference
counters
(U32,43,49)
determine
at
what
count
each
of
the
timing
counters
begins.
In
Title
mode,
the
screen
is
masked
to
show
only
the
lowest
of
the
eight
lines.
The
Title
position
also
provides
a
preset
input
to
the
line
counter,
freezing
it
at
the
address
corresponding
to
the
cursor
position
(U34,39,46),
such
that
thedine
of
information
above
the
cursor
appears
at
the
bottom
of
the
screen.
Using
the
cursor
up
or
down
controls
changes
the
cursor
address,
hence
the
line
displayed.
In
Crawl
mode,
the
reference
counters
undergo
continuous
change,
creating
the
impression
of
character
motion
from
right
to
left.
The
end-of-field
(EOF)
signal
clocks
the
bit
counter
(U49)
once
per
field
causing
the
display
to
begin
earlier
on
each
scan
line.
When
10
dots
have
been
counted,
the
character
counter
(U44)
shifts
by
one
character
allowing
the
process
to
begin
again.
After
16
characters
have
been
counted,
the
first
character
of
the
next
line
becomes
first
to
be
displayed.
In
most
units,
the
completion
of
eight
lines
advances
the
page
register
by
one
page
(the
one-
page
crawl
option
bypasses
this
step,
allowing
a
single
page
to
repeat).
The
PAUSE/FLASH
keyswitch
temporarily
freezes
the
reference
bit
counter,
halting
Crawl
motion.
4-2

SECTION
5
—
Parts
List
Reference
Designation
Cl
C2
C3
C4,C5
C6
C7
C8
C9
C10
Cll
C12,£13
C14
C15
C16
en
C18
C19
C20
C21
C22
C23
C24
CR1,
CR2
CR3,
CR4
CRS
D1
thru
D8
Fl
jl
J2,33
14
Pl
P2,
P3
P4
Ql
Q2,
Q3
Q4,Q5
Q6
thru
Q9
Description
Capacitor,
Electrolytic,
220
uF,
10V
Capacitor,
Electrolytic,
10
uF,
25V
Selected
Capacitor,
0.1
uF,
50V
Capacitor,
Electrolytic,
220
uF,
10V
Capacitor,
0.1
uF,
SOV
Capacitor,
Electrolytic,
220
uF,
10V
Capacitor,
1.0
uF,
50V
Capacitor,
0.1
uF,
50V
Capacitor,
1.0
uF,
SOV
Capacitor,
0.1
uF,
SOV
Not
Used
Capacitor,
Electrolytic,
470
uF,
16V
Capacitor,
15
pF
Capacitor,
NPO,
100
pF
Capacitor,
1.0
uF,
SOV
Capacitor,
1000
uF,
50V
Capacitor,
Electrolytic,
10
uF,
25V
Not
Used
Capacitor,
0.01
uF,
100V
Capacitor,
0.002
uF
Capacitor,
0.001
uF
Diode
Not
Used
Diode
Rectifier
LED
Fuse,
1
Ampere,
250V
Connector,
24-pin
Connector,
6-pin
header
Connector,
3-pin
Connector,
Plug,
Female,
24-Pin
Connector,
Plug,
Female,
6-Pin
Connector,
Plug,
Female,
3-Pin
Transistor
Transistor
Transistor
Transistor
5-1
Manufacturer
Sprague
Sprague
Aerovox
Sprague
Aerovox
Sprague
Erie
Aerovox
Erie
Aerovox
Sprague
Centralab
Erie
Erie
Sprague
Sprague
Erie
Erie
Erie
National
Semiconductor
Varo
Dialco
Buss
Methode
Methode
Methode
Methode
Methode
Methode
National
Semiconductor
National
Semiconductor
National
Semiconductor
National
Semiconductor
Part
Number
196D227X9010TE4
503D106G025
AS
3420-050E-104M
196D227X9010TE4
3420-050E-
104M
196D227X
9010TE4
8131-050-651-105M
3420-050E-
104M
8131-050-651-105M
3420-050E-104M
503D477G016DK
DD150
8121-100-COGO-101K
8131-050-65
1-105M
TVA1316
503D106G025AS
8121-100-X7RO-103K
8121-100-X7RO-222K
8121-100-X7RO-102K
1N914
VH148
559-102-001
AGC-1
1100-1-124-01
1100-1-106-01
3100-1-103-01
1300-024
1300-006
3400-003
2N5139
2N5
134
2N5139
2N5134

Reference
Designation
Q10
Qll
R1,
R2
R3
R4
RS
R6
R7,
R8
R9
R10
R11,
R12,
R13
R14,
R1S,
R16
R17
R18
R19
R20
R21
R22
R23,
R24
R25
R26
R27
R28
R29
R30
R31,
R32
R33
R34
R35,
R36
R37
R38,
R39
R40
Description
Transistor
Transistor
Resistor,
1OK,
1/4W,
5%
Resistor,
Potentiometer,
500K
Resistor,
Potentiometer,
5K
Resistor,
1K,
1/4W,
5%
Resistor,
47K,
1/4W,
5%
Resistor,
LOK,
1/4W,
5%
Resistor,
100K,
1/4W,
5%
Not
Used
Resistor,
1OK,
1/4W,
5%
Resistor,
Potentiometer,
10K
Resistor,
75Q,
1/4W,
5%
Resistor,
150Q,
1/4W,
5%
Resistor,
2.2K,
1/4W,
5%
Resistor,
Potentiometer,
10K
Resistor,
75Q,
1/4W,
5%
Resistor,
150Q,
1/4W,
5%
Not
Used
Resistor,
1.0K,
1/4W,
5%
Resistor,
1M,
1/4W,
5%
Resistor,
1OK,
1/4W,
5%
Resistor,
1K,
1/4W,
5%
Resistor,
Potentiometer,
1K
Resistor,
100K,
1/4W,
5%
Resistor,
1OK,
1/4W,
5%
Resistor,
1M,
1/4W,
5%
Resistor,
5102,
1/4W,
5%
Not
Used
Resistor,
6.8K,
1/4W,
5%
Resistor,
10K,
1/4W,
5%
Resistor,
100K,
1/4W,
5%
Switch,
Momentary,
SPDT,
Center
OFF
Switch,
SPDT,
2-position
Switch,
SPDT,
Center
OFF
Switch,
DPDT,
2-position
Switch,
SPDT,
2-position
Switch,
DPDT,
2-position
Transformer
IC,
Character
Generator
IC,
4-Bit
Binary
Counter
IC,
Dual
J-K
Flip-Flop
IC,
Character
Generator
IC,
Hex
Inverters
IC,
Quad
2-Input
OR
Gates
Resistor
Network
IC,
Tri-State
Buffer
Resistor
Network
5-2
Manufacturer
National
Semiconductor
National
Semiconductor
Beckman
Beckman
Beckman
Beckman
RCO7
Beckman
RCO7
C&K
C&K
C&K
C&K
C&K
C&K
Signal
National
Semiconductor
National
Semiconductor
National
Semiconductor
National
Semiconductor
National
Semiconductor
National
Semiconductor
Beckman
National
Semiconductor
INTEL
Beckman
Part
Number
2N5139
2N5134
72P-R504
72P-R502
RCO7
72P-R103
RCO7
RCO7
RCO7
72P-R103
RCO7
RCO7
RCO7
72P-R102
RCO7
RCO7
7105561
7101361
7103J61
7201
7101
7201
241-4-16
DM8678BLK
74C93
74LS76
8678
74LS04
74LS32
784-1-R10K
80C97
2114
784-1-R10K
This manual suits for next models
2