Accessories - Tektronix 4023 Instruction Manual

4023
Users
INTRODUCTION
(cont.)
Accessory
devices
are
offered for the
4023
to
help
you and your
company
more
effectively
use the
Terminal
in a
computer
system.
Accessories for the
4023
include video monitors,
digital
magnetic
storage
units,
and hard copy
units.
A
hard
copy
unit
is
a
device
that,
when
connected
to
the
4023, can
make
paper
(hard copy) reproductions
of
information displayed on
the Terminal's
screen.
With
the preceding information
in
mind,
Fig.
1-2 can be
more
readily
understood.
This
figure
illustrates
the Terminal's
position
in a
data
processing system.
Data
from
a
computer
is
sent to the Terminal
via a
communication
link.
The communication
link
may
be
a direct
connection, or
may
be
special
equipment
that connects
the
Terminal and computer
using telephone
lines.
(Additional information on
the Terminal and computer
connections
is
provided
in
the
Part 2 of Section
II.)
The
Terminal's
interface applies the
received data to the Terminal Control
circuits,
which
cause
either display
writing or control
execution, depending on
the coded content
of the
incoming
signals.
Accessories
The 4023
In
A
Data
Processing System
AUXILIARY
DEVICES
Cjy>munication
Link
HARD
COPY
UNIT
TERMINAL
COMPUTER
Fig. 1-2.
4023
position
in a
data processing system.
®
1-3