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Tektronix 7613 User Manual

Tektronix 7613
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Circuit
Description—7613/R7613
Service
Column—One
of
the
vertical
lines
in
the
Character
Selection
Matrix
(see
Fig.
3-25).
Columns
C-O
(column
zero)
to
C-10
(column
10)
can
be
addressed
in
the
7613
system.
Row—One
of
the
horizontal
lines
in
the
Character
Selection
Matrix
(Fig.
3-25).
Rows
R-1
(row
1)
to
R-10
(row
10)
can
be
addressed
in
the
7613
system.
Time-slot—A
location
in
a
pulse
train.
In
the
7613
Readout
System,
the
pulse
train
consists
of
10
negative-going
pulses.
Each
of
these
time-slots
is
assigned
a
number
between
one
and
ten.
For
example,
the
first
time-slot
is
TS-1,
Time-multiplexing—Transmission
of
data
from
two
or
more
sources
over
a
common
path
by
using
different
time
intervals
for
different
signals.
Display
Format.
Up
to
six
words
of
readout
informa-
tion
can
be
displayed
on
the
7613
CRT.
The
position
of
each
word
is
fixed
and
is
directly
related
to
the
plug-in
unit
from
which
it
originated.
Fig.
3-24
shows
the
area
of
the
graticule
where
the
readout
from
each
plug-in
unit
is
displayed.
Notice
that
channel
1
of
each
plug-in
unit
is
displayed
within
the
top
division
of
the
CRT
and
channel
2
is
displayed
directly
below
within
the
bottom
division.
Fig.
3-26
shows
a
typical
display.
Left
Vert
Right
Vert
Horizontal
i
;
fe
I
(
Channel
7
i
|
Channel
1
Channel
1
t
*
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'
i‘
1
'
a
z
i
'
7
1
4
Â¥
4
:
rnidmulh
Td
ll
nd id
om
Bk
dk:
Wd
ance
Boudn
Hud
Be
Bundbnd
-
Tsu
usd
i
'
:
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ol
‘
4
i
:
t
4 §
' i
Channel
2
|!
Channel
2
‘
Channel
2
1
1
Fig.
3-24.
Location
of
readout
words
on
the
CRT
identifying
the
originating
plug-in
unit
and
channel
(one
complete
frame
shown,
simulated
readout).
3-32
Each
word
in
the
readout
display
can
contain
up
to
10
characters,
although
the
typical
display
will
contain
be-
tween
two
and
seven
characters
per
word.
The
characters
are
selected
from
the
Character
Selection
Matrix
shown
in
Fig.
3-25.
Any
one
of
the
50
separate
characters
can
be
addressed
and
displayed
on
the
CRT.
In
addition,
12
operational
addresses
are
provided
for
special
instructions
to
the
Readout
System.
The
unused
locations
in
the
Matrix
(shaded
areas)
are
available
for
future
expansion
of
the
Readout
System.
The
method
of
addressing
the
locations
in
the
Character
Selection
Matrix
is
described
in
the
following
discussion.
Developing
the
Display.
The
following
basic
description
of
the
Readout
System
uses
the
block
diagram
shown
in
Fig.
3-27.
This
description
is
intended
to
retate
the
basic
function
of
each
stage
to
the
operation
of
the
overall
Readout
System.
Detailed
information
on
circuit
operation
is
given
later.
The
key
block
in
the
Readout
System
is
the
Timer
stage.
This
stage
produces
the
basic
signals
which
establish
the
timing
sequences
within
the
Readout
System.
Period
of
the
timing
signal
is
about
250
microseconds
(drops
to
about
210
microseconds
when
Display-Skip
is
received;
see
detailed
description
of
Timing
stage
for
further
informa-
tion).
This
stage
also
produces
control
signals
for
other
stages
within
this
circuit
and
interrupt
signals
to
the
Vertical
Interface,
Horizontal
Interface,
CRT
Circuit,
and
Z-Axis
Logic
stage
which
allow
a
readout
display
to
be
presented.
The
Time-Slot
Counter
stage
receives
a
trape-
zoidal
voltage
signal
from
the
Timer
stage
and
directs
it
to
one
of
ten
output
lines.
These
output
lines
are
labeled
TS-1
through
TS-10
(time-slots
one
through
ten)
and
are
connected
to
the
vertical
and
horizontal
plug-in
compart-
ments
as
well
as
to
various
stages
within
the
Readout
System.
The
output
lines
are
energized
sequentially
so
there
is
a
pulse
on
only
one
of
the
10
lines
during
any
250
microsecond
timing
period.
When
the
Time-Slot
Counter
stage
has
completed
time-slot
10,
it
produces
an
End-of-
Word
pulse
which
advances
the
system
to
the
next
channel.
Two
output
lines,
row
and
column,
are
connected
from
each
channel
of
the
plug-in
units
back
to
the
Readout
System.
Data
is
encoded
on
these
output
lines
by
con-
necting
resistors
between
them
and
the
time-slot
input
lines.
The
resultant
output
is
a
sequence
of
ten
analog
current
levels
which
range
from
zero
to
one
milliampere
(100
microamperes/step)
on
the
row
and
column
output
lines.
This
row
and
column
correspond
to
the
row
and
column
of
the
Character
Selection
Matrix
in
Fig.
3-25.
The
7613

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Tektronix 7613 Specifications

General IconGeneral
BrandTektronix
Model7613
CategoryTest Equipment
LanguageEnglish

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