____
LEAR
SIEGL.ER,
INC.
DATA PRODUCTS DIVISION
contains
most
of
the
video circuitry,
and
(3)
the
flyback assembly. The
monitor
display screen
measures
12
inches
diagonally.
1.5 SPECIFICATIONS
The
ADM
SA
specifications
are
listed
in
Table
I-
I,
page
1-6.
1.6 CHARACTER FORMAT (Figure 1-3)
The
standard
ADM
3A
character
set
contains
96
ASCII
characters.
Control
characters
are
not
displayed
when
they
are
generated.
The
displayable
96
ASCII
characters
consist
of
upper
and
lower case letters, numerics,
and
punctuation.
1.7 WORD STRUCTURE
The
ADM
3A
transmits
and
receives serial
asynchronous
data
in
a '9-bit, 10-bit, or
II·bit
format
in
the
folloV\"1ng
sequence:
• One
start
bit
• Seven or
eight
data
bitE
• One or no
parity
bit
• One
or
two
stop
bitE
Parity
selection (odd, even, or no
parity)
is
permitted with both
the
7·bit or
B-bit
data
word.
If
an
B-bit
data
word is selected,
then
bit
number
eight
can
be
designated
to be
either
HI" or
ICO."
Parity
selection
and
the
value of
bit
number
eight
are
selected
in
the
set-up mode. Refer to
Section
III.
1.8 ANSWERBACK PROGRAMMING
The
ADM
3A
provides
a
32·byte,
user-
programmable,
answerback
message
stored
in
volatile memory.
Answerback
with NVM
is
optional.
The
message
is
transmitted
in
response
to
an
ENQ
code from
the
host
computer
or
by
pressing
the
I
HERE
IS
Ikey for
display
on
the
terminal
if
it
is
in
half·duplex mode. The
answerback
is
programmable
through
the
'[
CTRL(AJ
in
the
set-up mode. Refer to
Section
III.
1.9
DATA
ENTRY AND OVERFLOW
New
data
enters
on progressive lines, from top to
bottom. When
the
cursor is on
the
bottom line, line
feed
causes
upward
scrolling
of
the
entire display
1-4
page,
\\T}}en
overflow occurs,
the
entire
display
page
is scrolled
upward
one
line
as
new
data
enters
at
the
beginning
of
the
new bottom line.
If
auto
newline is
not
enabled
in
set-up mode, a
CR/LF
must
be sent.
1.10 KEYBOARD
LAYOUT
OPTIONS
Four
character
formats,
which
are
selectable via
the
set·up mode,
are
available
",nth
the
ADM
3A
for
the
following
language
sets: USASCII·
QWERTY,
UKASCII·QWERTY,
German·
Q\\TERTZ,
and
French·AZERTI:.
1.11 OPTIONAL
FEATURI~S
The
standard
ADM
3A
can
be
further
equipped
with
several
options.
1.11.1 20mA Current Loop On
Extension Port
This
option
permits
the
extension
port to be used
in a
current
loop application.
1.11.2 20mA Current Loop On Modem
Port
This
option
permits
the
modem port to
be
U8ed
in
a
current
loop application.
1.11.3 RS·422 Interface
O~.tlon
This
option
permits
the
modem
port
to
be
used
in
an
RS·422 application.
1.11.4 230 VAC
For
this
option, a 230-volt tlransformer
and
appropriate
power cord
are
provided to
make
the
ADM
3A
suitable
for 230-volt operation.
1.11.5 Green Phosphor Display
A green
display
screen is
available
with
the
ADM
3A.
This
option
has
a longer life
than
thE
8tandard
white
screen.
1.11.6 Answerback Storage (NVM)
The
ADM
SA
incorporates
fSLcilities
to
add
answerback
NVM
as
an
option.
This
provides
thf
capabilities to store up to 8 32-character
message
in
non·volatile memory. Answerback
~~lttf
may
be ordered with
the
terminal
or
as
an
add-on, plug·
in component.
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