Lear Siegler ADM 3A Assembly instructions

Tenth Anniversary Edition
ADM 3~A Dumb Terminal®
VidE~ Display Terminal
Userl. Reference Manual
LEAR SIEGLER, INC.
DATA PRODUCTS DIVISION
901 EAST BALL ROAD, ANAHEIM, CALIFORNIA 92805

DP2880486F
Tenth Anniversary
ADM3A
Dumb Tel1minal®
Video Displa~~ Terminal
(!)
LEAR SIEGLEIFt INC.
USERS REF:ERENCE
MANlJAL
C1986 LEAR SIEGLER, INC. APRIL 1986

__ LEAR SIEGLER, INC.
DATA PRODUCTS DIVISrON
TABLE OF CC)NTENTS
SECTION PAGE
I GENERAL DESCRIPTION 1·1
1.1 I~-rrRODUCTION 1·1
1.2
PURPOSE AND USE , I-I
1.3 OPERATIONAL DESCRIPTIO?" 1·2
1.3.1 Ke)'board
1..:3
1.3.2 Input/Output (I/O) Port 1..:3
1.3.3 ADM 3A Control Logic 1--3
1.3.4 Set·UpMode 1-3
1.3.5 Send/Receive Modes 1-3
1.3.6 Displa)' Memory 1·3
1.3.7 CRT Display Monitor 1-3
1.4 PHYSICAL DESCRIPTION 1·3
1.5 SPECIFICATIONS 1-4
1.6 CHARACTER FORMAT 1-4
1.7 ~'ORD STRUCTURE 1-4
1.8 ANS'NERBACK PROGRAMMING 1-4
1.9 DATA ENTRY AN'D OVERFLO\\' , 1-4
1.10 KEYBOARD LAYOUT OPTIONS 1·4
1.11
OPTIONAL FEATURES 1-4
1.11.1 20mA Current Lx>p On Extension Port , 1-4
1.11.2 20mA Current Loop On Modem Port 1-4
1.11.3 RS-422 Interface Option 1-4
1.11.4 230 V AC· 1-4
1.11.5 Green Phosphor Display 1-4
1.11.6 Answerback Storage CNVM) 1-4

--_ LEAR SIEGLER, INC.
DATA PRODUCTS DIVISION
TABLE OF CONTENTS (cont'd)
SECTION PAGE
II INSTALLATION 2-1
2.1 GENERAL 2-1
2.2 SPECIAL SAFETY REQUIREMENTS 2-1
2.3 UNPACKING AND INITIAL INSPECTION " 2-1
2.4 SITE REQUIREMEN'I'S " 2-1
2.5 INITIAL PREPARATION " 2-2
2.5.1 Line Voltage Selection " 2-2
2.5.2 Set-Up Mode Preparation , 2-2
2.6 INTERFACE INFORMATION 2-2
2.6.1 'RS-232C Modem Port Interface 2-2
2.e.2 p...s 232C Ex~nsion Port Interface 2-2
2.7 INSTALLING THE ADM 3A 2-2
2.8 POVtTER TURN-ON 2-B
2.9 POWER TURN-OFF 2-10
2.10 CLEANING 2-10
2.11 INSPECTION 2-10
III OPERATION 3-1
3.0 PRELIMINARY NOTE 3-1
3.1 GENERAL 3-1
3.2 KEYBOARD OPERATIONS 3-1
3.3 SET-UP MODE OPERATIONS 3-1
3.3.1 Enter Set-Up Mode 3-1
3.3.2 Set Terminal Configuration Parameters 3-5
3.3.3 Exiting Set-Up Mode 3-5
3.3.4 Save Current Terminal Configuration Values ', 8-5
3.3.5 Enter Personality Mode " 3-10
3.3.6 Enter Answerback Programming Mode " 3-10
3.3.7 Program Mode " 3-11
3.3.8 Cancel Current Mode " 3-11
3.3.9 Restore Active Set-Up 3-11
3.3.10 Default Active Set-Up 3-11
3.3.11 Reset The ADM 3A 3-11
I:

___ LEAR SIEGLER, INC.
DATA PRODUCTS DIVISION
"TABLE OF CON-rENTS (cont'd)
SECTION PAGE
3.4 GRAPHICS 3-11
3.5 INTERFACE CONTROL OPE:RATIONS 3-11
3.5.1 Data Communication Ports 3-11
3.5.2 Request To Send Operation 3-11
3.5.3 Code Turnaround Operlation 3-11
3.6 PROGRAMMING CONSIDERA.TIONS 3-13
3.6.1 Remote
CTRL Operation '3-13
3.6.2 Remote Load-Cursor OJ:.eration 3-13
3.6.3
Escape Sequences 3-13
3.7 GATED EXTENSION PORT OPERATION 3·13
ill

- __ LEAR SIEGLER, INC.
DATA PRODUCTS OlVISION
LIST OF FIGURES
FIGURE
1-1
1-2
1-3
2-1
2-2
2-3
2-4
2-5
2-6
2-7
3-1
TABLE
I-I
3-1
3-2
3-3
3-4
3-5
PAGE
ADM 3A Video Display Terminal "........... 1-0
ADM 3A Data Flow Block Diagram ". . . . . . . . . .. 1-2
ADM 3A Graphic Character Set and CTRL Codes " 1-7
ADM 3A Assembly " 2-3
ADM 3A Connector 1.Dcations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . .. 2-4
Typical ADM 3A Application 2-5
Modem and RS-232C Extension Interface L>gic 2-6
Optional Current Loop and &8-422 Interface Logic '........... ~ 7
ADM 3A Rear Panel Controls. . . .. . . . .. . . .. . .. . . .. . . . .. . .. . . .. . . . .. . . .. . .. 2-8
ADM 3A Front Panel Controls ~9
ADM 3A Standard Keyboard Operational Characteristics 3-2
LIST OF TABLES
PAGE
ADM 3A Specifications 1·5
Keystroke
Explanations 3-1
Set-Up Mode Functions and Control Codes 3-4
Set-Up Mode - Terminal Configuration Parameters 3-6
Personality Mode Functions 3-10
ADM 3A Escape Sequences 3-12
APPENDIX A
ASCII CONTROL CODE CHART A·I
CO!'.TTROL AND OPERATORS CODES CHART A·2
ABSOLUTE CURSOR POSITIONS CHART A·3
ADM 3A ATIRIBUTE CODES A-4.
ADM 3A GRAPHICS/ATTRIBUTES CODES A-5
LIMITED GRAPHICS CHARACTER
SET A-fS
iv

,LEAR SIEGLER, INC.
DATA PRODUCTS DIVISION
PREFJ~CE
This Users Reference Manual describes the function and operation
of the ADM 3A Video Display Terminal. The instructions and
information are presented to aid operational personnel in the
installation, operation, and care of the ADM 3A. All operator
controls are
described. in detail, and remote programming
considerations are presented in sufficient detail to enable an
experienced operator to use the equipment efficiently when
confronted with nonstandard applications.
This
equipment generates, uses, and can radiate radio
frequency energy
and if not installed and used in
accordance with the instruction manual, may cause
interference to radio comntunications.
It has been
tested
and found to comply with the limits for Class A
computing devices pursuant to Subpart J of Part15 of
FCC Rules, which are designed to provide reasonable
protection
against such interference when operated in
acommercial environment. Operation of this
equipment in aresidential area is likely to cause
interference,
in which case the user at his own expense
will be required to
take whatever measures may be
required to correct the interference.
Only shielded
cables
with the shield terminated to the metal hood of
the connector can be used.
v

____ LEAR SIEGLER, INC.
DATA PRODUCTS DIVISION
Figure 1-1. ADM 3A Video Display Terminal (lOth Anniversary Edition)
1-0

_, __ LEAR SIEGLER, INC.
DATA PRODUCTS DIVISION
SECTIC)N I
GENERAL
DE~SCRIPTION
1.1 INTRODUCTION
This lsection of the manual describes the primary
function of the Lear Siegler ADM 3A video
display tenninalsho\\rn in Figure I-I, page 1-0.
Other information in this section includes
specifications, operating features and ranges,
physical dimensions, and a list of available
options.
1.2 PURPOSE AND USE
There are numerous applications of the ADM SA,
all
involving the transfer of asynchronous data.
In some applications, data transfer may b€
exclusively unidirectional; either from the ADM
3A to a host computer, or from the computer to the
ADM 3A. However, a more frequent application
of thE~ ADM 3A is one in which an operator
communicates with the computer, and the
computer reacts in accordance with its stored
program.
The ADM 3A features the following general
capabilities:
•FlJ:lll28 ASCII character set with 24 lines x80
characters, non-glare display (24th line is used
in set-up mode to select terminal parameters)
• Eleven communication rates in full-duplex
and half-duplex send/receive modes
• Scrolling
• Absolute cursor positioning
• Variable 9-, I()., or II-bit word structures
• Upper and lower case characters standard
• Program mode
• Selectable auto new line operation
,-,
• Standard RS-232C or optional 20mA current
loop interface, with RS-232C extension
interface for auxiliary devices. (Selectable
keyboard lock or gated extension port).
Optional current loop interface on extension
port.
• DTR or X-an/X-Off handshake mode
• Special control character sequences
• Selectable refresh rate: 50 Hz or 60 Hz
• Non-volatile set-up mode for terminal
configuration
• Personality mode to designate unique
characters for:
-Fill
character
- Turnaround code
-X-On
IX-Off characters
- Answerback (with NVM optional)
•Six non-embedded visual attributes:
- Blank
- Blink
- Reverse video
-
Underline
- Reduced intensity
- Character graphics
• CRT screen saver
• Full screen reverse video
•
Selectable key click
•
Business graphics

____ LEAR SIEGLER, INC.
DATA PRODUCTS DIVISION
DISPLAY
MEMORY
24 LINES,
80 CHARACTERS PER LINE
(CONTROL)
CRT
DISPLAY
MONITOR
ADM 3A
CONTROL
INPUT
10UTPUT
PORT
ROUTING
IN
HALF
DUPLEX
COMPUTEFi
KEYBOARD
EXTENSION INTERFACE
TO
AUXILIARY DEVICE
Figure 1-2. ADM 3A Data Flow Block Diagram
• Four keyboard layouts:
-USASCII-QVlERTY
-UKASCII-QVlERTY
-Ckrman-Q\\YERTZ
-French-AZERTY
1.3 OPERATIONAL DESCRIPTION
The ADM 3A is an interactive device which is
1-2
used to enter, display, and send information to a
host computer, and to receive and display
information from the computer. Using akeyboard
similar to that of a standard typewriter, the
operator
may enter information which is
immediately transmitted to the computer, and
may be simultaneously displayed on acathode ray
tube (CRT). Data from the computer is received
and displayed at baud rates as high as 19,200 (the
maximum baud rate when using the current loop
option is 9600).

, __ LEAR SIEGLER, INC.
DATA PRODUCTS DIVISION
1.3.1 Keyboard
The keyboard contains 59 keys from which data
entry and control functions are initiated. Each
keystroke is encoded into a corresponding ASCII
character which is immediately transmitted to the
host computer. The character is also routed back
to the CRT display: directly in half-duplex
operation, or echoed from the host computer via
the input/output (I/O) interface in full-duplex
operation.
1.3.2 Input/Output (I/O) Port
The modem I/O portis the link, or interface, that
handles the flow of data in both directions
between the ADM 3A and the computer. It may be
configured for either RS-232C or optional 20mA
current loop operation.
With the modenl DTR or X-On/X-Off handshake
feature, all data transmitted from the host, even at
speeds up to 19,200 baud, will be received by the
ADM 3A without data loss (9600 for current loop.)
1.3.3 ADM 3A Control Logic
The ADM 3A control logic interprets the control
codes that originate either at the keyboard or host
computer, and directs the activities of the ADM
3A accordingly. These activities include data
handling and formatting.
1.3.4 Set-Up Mode
The ADM 3A features a non-volatile set-up mode
which allows the terminal parameters to be
selected through commands from the keyboard.
These parameters, including baud rates, word
structures, cursor type, communications control,
and operating modes, can then be "saved" in
memlory and retained when power is shut off.
1.3.5 Send/Receive Modes
Two selectable send/receive modes are available
in the ADM 3A through the set-up mode: half-
duplex and full-duplex. In the half-duplex mode,
each character is transmitted to the computer as it
is entered on the keyboard and is simultaneously
displayed on the CRT monitor.
In full-duplex operation, the ADM 3A can
transmit and receive information in both
directions simultaneously. Characters are
transmitted as they are entered at the keyboard,
1-3
but are displayed only upon reception. In order to
display transmitted characters, they must be
echoed
back from the host computer or data set.
1.3.6 Display Memory
The display memory contains a random access
memory (RAM), video logic and character
generation circuits appropriate for controlling the
CRT display. The memory is capable of holding
1,920 characters, which are stored in sequentially
scanned locations. The scanned data is then sent
to the CRT for displaying. Input to the display
memory consists of the data character codes from
the I0 port or keyboard, under the control of
signals from the control logic circuits.
1.3.7 CRT Display Monitor
The CRT display monitor is a rectangular screen
measuring 12 inches diagonally. Data characters
are displayed on 24 equally spaced rows, each
consisting of 80 characters. The 80-character lines
are displayed clearly at a refresh rate of either 50
or 60 Hz, corresponding to the AC line frequency.
1.4 PHYSICAL DESCRIPTION
The ADM 3A is a self-contained unit consisting of
four major assemblies: (1) base and cover
assembly, (2) main logic board, (~-)) keyboard and
(4) the CRT monitor. The power transformer and
intercomponent cabling are located on the base
portion of the terminal.
The cover portion of the terminal contains the
CRT monitor and its associated subassemblies.
The cover is hinged to the base at the rear, and
when swung open, all components of the ADM 3A
are exposed.
The main logic board contains all other operating
elements of the ADM 3A that are not contained in
the CRT monitor, keyboard and the base
assembly. The logic board is connected to a metal
plate which anchors to the base supports of the
unit. Two connectors on the logic board provide
the RS-232C current loop interface and the RS-
232C
extension interface.
The keyboard assembly is made up of integrated
key rows (or modules). It is connected to the main
logic board by an eight pin connector.
The CRT monitor consists of three subassemblies:
(1) the CRT itself, (2) a printed circuit board that

____ 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, a230-volt tlransformer and
appropriate power cord are provided to make the
ADM 3A suitable for 230-volt operation.
1.11.5 Green Phosphor Display
Agreen display screen is available with the ADM
3A. This option has alonger 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 832-character message
in non·volatile memory. Answerback ~~lttf may
be ordered with the terminal or as an add-on, plug·
in component.

____ LEAR SIEGLER, INC.
DATA PRODUCTS DIVISION
Table 1·1. ADM 3.A Specifications
SP ECIFI CAT ION
Display Format
CRT Screen
Refresh Rate
Horizontal Sweep Rate
Display Area
Character Set, Generated
Character Set, Displayed
Character
Matr ix
Character Fielc
Business Graph
ic:s
Cursor
Cursor
Controls
Keyboard
Functional Control Ke','s
Transmission Modes
Computer Interfaces (modem)
Data Rates
Parity
Word Structure
Extension Interfaces
DESCRIPTION
24 lines x 80 characters
30.5cm (12-inch ldiagonal, P4 phosphor with non-glare surface.
50 Hz or fiO Hz, depending on line frequency (selectable in set-up)
16.2 kHz
14.7cm (5,8 inchesl high x 21cm (8.3 inches) wide
128 ASC" characters (with 32 control characters)
96 ASCII c:haracters plus special foreign characters.
5 x 7 dot matrix 1.88mm (0.074 inch) wide x 4.77 mm (0.188 inchl
high
7 x 10 dot matrix 2.62 cm (0.103 inch) wide x 614mm (0.241 inch)
high
Block graphics and line drawing characters.
CUR CTRL. ON: 7 x 10 dot matrix. Reverse image rectangle cursor.
Homes to upper left of screen.
CUR CTRL OFF: Double underline,S dots wide, Homes to first
position of bottom line.
Two-key cursor controls; Backspace I CTR LIH ,Forespace
ICTRL IL I, Up ICTRL ~ ,Down I CTRL 1J I. Home I~C~T-=-R-Lr-II\-;'
59 keys, 26·letter alphabet with upper and lower case, numerics
o through 9. punctuation, and control. Keys are auto-repeating (15
characters per second),
if auto repeating is enabled in set-up mode,
Escape, Rubout (delete), Break, Return, Shift, Clear, Repea~.
Line Feed, Control, Here Is.
Ful1 duplex. half duplex
RS·232C point-to-point or optional 20mA current loop.
75, 110, 150,300, 600, 1200, 1800, 2400,4800, 9600. and 19,200
baud (9600 baud maximum for 20mA current loop)
Even, odd, c,r none
Total word length: 9, 10. or 11 bits
Start: 1 bit
Data: 7or 8bits (8th bit 0or 1)
Stop: 1 0' 2bits
RS·232C extension
pon for interfacing serial asynchronous ASCII
hard copy printer, magnetic tape recorder, or other serial asynchronous
devices using selectable
keyboard lock or gated extension port.
'-5

-- __ LEAR SIEGLER, INC.
DATA PRODUCTS DIVISION
Table 1-1. ADM 3A Specifications (continued)
SPECIFICATION
Non-volatile Set-Up Mode Selections
Operating
Environment
Temperature:
Humidity'
Altitude:
Power Requirements
Standard:
Optional:
Heat Dissipation:
Dimensions and Weight
Depth:
Height:
Weight
Options
DESCRIPTION
No dip switches .. terminal functions are selectable from the key·
board. Selectable features include:
Half or full·duplex
All available baud rates
Sever
or eight data bits
Parity enable/disable
Odd
or even parity
One or two stop bits
Bit 8 == 0or 1
EIA R5-232C Mode: 103 modem, 202 modem, mlocal
Handshake mode
Upper /Iower case
Caps lock
Auto New Line
Return key CR or CR LF
Keyboard layouts: US, UK, German or French
Refresh rate:
50 or 60 Hz
Key click
Auto repeat
Margin bell
Keyboard lock
SO/51. lock or gate
Clea" screen
Attributes enabled/disabled
Full screen reverse
Screen saver
Scrolling
Cursor
Control
Program mode
Here Is Key
Displayed space or advance
5~ to 95%, noncondensing
3.048km (10,000 feet) maximum
115 VAC ±1()01t, 60 ±3 Hz, 60 watts nominal
230 VAC ±10%, 50/60 ±3 Hz, 60 watts nom inal
205 BTU per hour
39.6cm (15.5 inches)
51.3cm (19.85 inches)
34.3cm (13.51 inches)
14.5kg (32 pounds)
20mA current loop on modem or extension port, green phosphor $Creen,
answerback NVM, RS·422, international keycap sets.
1-6

- __ LEAR SIEGLER, INC.
DATA PRODUCTS DIVISION
CONTROL GRAPHIC CHARACTER SET
I
HEX
a1234567I
BITS BITS
4376
~
00 00
01011010
11
11
21
!50101a101
a
0000
NUL
OLE
SP
0@P\P
1
0001
SOH
DCI
!1AQaq
2
0010
STX
DC2
II
2BRbr
3
0011
ETX
DC3
#3C S csI
4
0100
EDT
OC4
$40Tdt
5
0101
ENQ
NAK
%5EUeu
6
0110
f,f"V
SYN
&6FV f v
f\'-'"
7
0111
BEEP
ETB
,7GW9wi
8
1000
BS (+-)
CAN
(8HXhx
9
1001
HT (T AS)
EM
)9IY;Y
A
1010
LF ( ~ )
SUB
*JZjz
B 1011
VT
( t )
ESC
+;K[ktI
C 1100
FF
(--+ )
FS
<L\,II
,I
0 1101
CR
GS
-=M]m1
E 1110
SO
J RS (HOME)
>N
1\
n'"'-'
F
1111
SI
US (NEW LINE)
/?a-0
*OEL
(RUB)
\."- ..,. .. __ ----', \.., .... ------..-J/
CONTROL
CODES
(GENERATED BY HOLDING
CTRL KEY WHILE TYPING
THE CORRESPONDING
KEY SHOWN IN COLUMNS
4 AND 5,) DISPLAYABLE IN
PROGRAM MODE,
UPPER/LOWER CASE
DISPLAYABLE IN
STANDARD ADM 3A
Figure 1·3. ADM 3A Graphic Character Set and CTRL Codes
'-7

,LEAR SIEGLER, INC.
DATA PRODUCTS DIVISION
SECTI~DN II
INSTALL,ATION
2.1 GENERAL
Installation procedures involving unpacking, site
requirements, initial set-up, and operation
checkout of the ADM 3A are contained in this
section of the manual.
2.2 SPECIAL SAFETY REQUIREMENTS
No special safety requirement.s are imposed;
observe normal safety procedures when installing
the ADM 3A.
2.3 UNPACKING AND INITIAL
INSPECTION
Each ADM 3A is thoroughly inspected and
carefully packaged prior to shipment. Every
precaution is taken to ensure that each unit is
complete and ready for installation at the
customer's site. However, it is recommended that
each unit be inspected upon receipt for transit
damage. Start by examining the exterior of the
package for evidence of rough or careless
handling. Then perform a thorough visual
inspection of the internal components and
su bassem blies. As arule, most transportation
companies will not honor claims for damage
unless they are filled promptly; therefore, the
following steps should be taken:
1. Verify that each item shown on the sales
order packing slip has been included in the
shipment. Contact LSI or your distributor
immediately in the event of packing
shortage.
2. Check to verify that the serial number of the
unit corresponds to that shown on the
invoice.
3. Check the hardware to determine whether
any assemblies or screws were loosened
during shipment. Tighten as required.
2-1
4. Inspect for dust or foreign material which
may impair electrical contact when cable
connections are made. Vacuum to remove
any loose dirt.
6. Install and test operation of the ADM 3A as
soon as possible after delivery. (This is very
important since internal damage to the
equipment cannot be determined by visual
inspection alone.)
6. If, in your opinion, the equipment has been
damaged (either internally or externally),
notify the agent of the transportation
company immediately and request an
inspection. If assistance is needed to describe
the extent of the damage or the repairs that
will be necessary, contact your local sales
and service office.
2.4 SITE REQUIREMENTS
The ADM 3A may be used conveniently in a
normal office environment because special
mounting provisions are not required. However, it
is recommended that a weather-protected
environment with an ambient temperature range
of 41°F to 122°F (5°C to 50CC) and relative
humidity of less than 95 percent be maintained for
equipment use.
To prevent condensation from
developing, allow the ADM 3A to
temperature stablize when changing
locations. Condensation could
develop in the unit and adversely
affect the operation of the device.

____ LEAR SIEGLER, INC.
DATA PRODUCTS DIVISION
Whenever the ADM 3A is physically moved to a
warmer environment than its former location, be
sure to allow sufficient time for the equipment to
equalize
with the warmer location before
activating the terminal. Condensation developed
by the temperature differential may possibly
impair ADM 3A operation.
Figure 2-1, page 2-3 shows the ADM 3A
dimensions. Refer to Section I of this manual for
installation power and environmental
requirements. Installation of the ADM 3A
requires:
•
Table or desk mounting
• Standard three-pronged, 115-volt or 230-volt
power
outlet
• Cable connection to the computer, modem,
serial printer, or other auxiliary device. If
connection to a remote computer is desired, a
modem or data set may be required.
2.5 INITAL PREPARATION
Initial preparation includes making sure that the
ADM 3A will not be plugged into an AC line
power output that will damage the equipment; and
checking and/or resetting the terminal
configuration parameters through the set-up
mode as necessary.
2.5.1 Line Voltage Selection
The ADM 3A is shipped properly connected for
either 1I5-volt or 230-volt AC line power, as
specified in the purchase order. Any change for
operation with a different line voltage requires
changing components in the ADM 3A, which
should be accomplished only by authorized LSI
Maintenance Personnel. (Unauthorized circuit or
component changes invalidate the equipment
warranty.)
2.5.2 Set-Up Mode Preparation
The terminal operating configurations of the
ADM 3A are controlled by firmware "switches"
and have been pre-set at the factory to the default
conditions as indicated in Table 3-3 (page 3-6) of
Section III. By entering the set-up mode, the
operating configurations are displayed on the
status line (line 24) and can be changed.
2-2
2.6 INTERFACE INFORMATION
The ADM 3A may be connected directly to alocal
computer, or connected via telephone data lines to
a
remote computer. Remote computer connections
usually require the use of a modem or data set.
Figure 2-2, page 2-4 shows the connector/pin
assignments for the modem and extension ports.
Figure 2-3, page 2-5 shows a typical ADM 3A
application. The ADM 3A"s modem and
extension port connectors are shown in Figure 2-
6, page 2-8.
2.6.1 RS-232C Modem Port Interface
The modem port interface is used to connect the
terminal directly to acomputer" modem, or data
set in RS-232C or current loop application. See
Figure 2-4, page 2-6 and Figulre 2-5, page 2-7.
2.6.2 RS-232C Extension Port Interface
The extension port interface extends the standard
RS-232C capabilities of the ADM: 3A by allowing
the connection of a serial RS-23:2C peripheral.
The gated extension port mode, when selected in
the set-up mode, allows selective transmission of
data from the keyboard, in half-duplex mode, or
the communication line through the extension
port.
Note
The peripheral device that is attached
to the extension port must operate at
the same baud rate as the
communication line.
2.7 INSTALLING THE AD~,'1 3A
To install the ADM 3A, proceed as follows:
1. Check the power ON/OFF switch on the back
of the terminal to be sure itis off (Figure 2-6,
page 2-8).
2. Connect the data interface c:able(s) using the
appropriate interface infornlation in Figure
2-2, page 2-4, Figure 2-3, page 2-5 and
Subsection 2.6.
3. Plug the power cord to a grounded AC outlet
of the correct voltage.

.... LEAR SIEGLER. INC.
DATA PRODUCTS DIVISION
MECHANICAL ASSY
137243
1351"
PC BOARD CONFIGURATOR
137240
, I. 19 85" ---------.J
! 10-32,3 4 SCREW (REF I
ROCKER
SWITCH
/"" MODEM PORT CONNECTOR
EXTENSION PORT CONNECTOR
NAMEPLATE (REF)
SEE
137243 FOR ENTRIES
_____ 15.55" .l.--_.J
NOTES
FOR PRODUCT CONFIGURATION REFER TO 137200PL
Figure 2-1. ADM 3A. Assembly
2-3

____ LEAR SIEGLER, INC.
DATA PRODUCTS DIVISION
MODEM PORT CONNECTOR
MODEM CURRENT LOOP
EXTENSION CURRENT LOOP
IJ2;
CONNECTOR IJ41 CO~~ECTOR IJ31
"N ~O
IIQ~AL FUNCTION
PIN ~O
SIGNAL FU~CTION
'I~ NO
SIGNAL FUNCTION
1FRAME
G~D
1CRXD 1ETXD
2
nco
22
JAXD
•
FITS
3 eLRXD·
3
EeLRXD·
Ii
elS
•CLRXD -•ECLRXO -
~
OSR
Ii
-12v
Ii
-12v
7GND
8 DeD
6GND 6GND
97
Cl TXD •7
Eel TXD.
10
ofUMfttA COHHECT10~
11
8CLTXD -8ECLTXD -
FOJil CVA"lNT LOOP
AHD .. :1-232C IE' I
12 9•
12.
9
+1211
13
lC + 5.
10
+ SV
PIN ~O ItONAL FUNCTION
14
15 "CTXD
11 ERXD ,..
:2
RS2J2C
16 2
.. 3CURRENT LOOP
(OFT10N~
12 12
17
Cl TXD·
/7
18
1\
19
20
DlF
2'
\ ·v
22
23
ClRxD -
24
CL nc, -
2!> ClRXD·
~
EXTENSIOPII POFIT CONNECTOI:<
IJ' J
PIN !'IiO
SIGNAL FUNCTIO~
II
,
FRA~E G"-:
2
ElXt'
v~
~
3
ERX:
4
ERTS
5
EC1S
6EDSF
7
G~r
eEDCD
9\I
1C
MONITOR CONNECTOR
"
IJ5
KEYBOAFIO CONNECTOR
1;:
IJ6,
, 3 PI!'Ii
NO
SIGNAL FUNCTIO""
PIN NO
SIGNAL FUNCTION
'4
,
KE\
15
1
G"'D
2
16
3
:2
+ 5v
17 EClRXD·
4VIDEC 3+
5.
18
5
19
6
;I
G"'D
20
EOTR
7CHASSIS GROUND 5KeD DAlA
21
8HSv",C 6
:2:2
9
IISv .... C
23
ECl TXC'
10
R[1URr.
7FRAME
G"'D
2.
EClRXC -"
+15V
8FRAME
G"':
n
ECllX: -, 2
Figure 2-2. ADM 3A Connector Locations
2-4