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EK-VGB20-IN-A01

April 1994

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Document:	VGB20 Video Terminal Installation and Operating Information
Order Number:	EK-VGB20-IN
Revision:	A01
Pages:	44
Original Filename:

OCR Text

VGB20 Video Terminal
Installation and Operating
Information
Order Number: EK-VGB20-IN. A01

April 1994
FCC ID: A09-VGB20
Note: This equipment has been tested and found to comply with the limits for
a Class B digital device, pursuant to Part 15 of the FCC rules. These limits
are designed to provide reasonable protection against harmful interference in a
residential installation. Any changes or modifications made to this equipment may
void the user’s authority to operate this equipment.
This equipment generates, uses, and can radiate radio frequency energy and, if
not installed and used in accordance with the instructions, may cause harmful
interference to radio and television reception; however, there is no guarantee that
interference will not occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
Re-orient or relocate the receiving antenna.
Increase the separation between the equipment and the receiver.
Connect the equipment to an outlet on a circuit different from that to which
the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.

ADDS is a trademark of Applied Digital Data Systems, Inc.
IBM, ProPrinter, and PS/2 are registered trademarks of International Business
Machines Corporation. SCO is a trademark of Santa Cruz Operations, Inc. TVI is
a trademark of TeleVideo, Inc. UNIX is a registered trademark of UNIX System
Laboratories, Inc.
WY and WYSE are registered trademarks of Wyse Technologies.
The Energy Star emblem does not represent EPA endorsement of any product or
service.
All Rights Reserved.
Printed in Taiwan.

This document was prepared using VAX DOCUMENT Version 2.1.

Contents
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1 Installation and Set-Up
1.1
1.2

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . .
Set-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1–1
1–5

2 Multiple Sessions
2.1
2.2
2.2.1
2.2.2
2.3

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using a Terminal Server with TD/SMP . . . . . .
Using SSU Host Software . . . . . . . . . . . . .
Opening Another Session . . . . . . . . . . . . . .
Tips for Using Multiple Sessions . . . . . . . . . . .

2–1
2–2
2–2
2–2
2–3

3 Desktop Features
3.1
3.1.1
3.1.2
3.1.3
3.1.4
3.2

Invoking Desktop Features . . . . . . . . . . . . . . .
Clock feature . . . . . . . . . . . . . . . . . . . . . . .
Calculator feature . . . . . . . . . . . . . . . . . . .
Show Character Sets feature . . . . . . . . . . .
Banner message . . . . . . . . . . . . . . . . . . . . .
Keyboard Summary . . . . . . . . . . . . . . . . . . . . .

3–1
3–2
3–3
3–4
3–4
3–5

iii

4 Defining Keys
4.1
4.1.1
4.1.2

Define Key Editor . . . . . . . . . . . . . . . . . . . . . .
Creating a New Function . . . . . . . . . . . . . .
Creating a Key Sequence . . . . . . . . . . . . . .

4–1
4–2
4–3

A Maintenance and Troubleshooting
A.1
A.2
A.3

Cleaning your Video Terminal . . . . . . . . . . . . .
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . .
Installing the ROM Cartridge . . . . . . . . . . . . .

A–1
A–1
A–3

B Specifications
Figures
1–1
1–2
1–3
4–1
B–1
B–2
B–3

VT Keyboard Layout . . . . . . . . . . . . . . . . .
PC-Style Keyboard Layout . . . . . . . . . . . . .
Communications Port Set-Up Screen . . . . .
Define Key Editor, Select Function . . . . . .
Comm1 and Comm2—Serial
Communication/Printer Ports . . . . . . . . . .
Comm3—9-Pin EIA 232 Port . . . . . . . . . . .
Parallel Printer Port (Bidirectional) . . . . . .

B–4
B–5
B–5

Recommendations for Proper Setup and
Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Identifying and Correcting Problems . . . . .
Standards Conformance and Approvals . . .

vii
A–2
B–6

1–4
1–4
1–9
4–3

Tables
1
A–1
B–1

Preface
Overview
This guide is for users who want to install and configure the VGB20
video terminal. This guide describes how to connect cables and enter
the Set-Up menu to make changes, as needed. This guide also has
reference tables for troubleshooting, specifications, and compose
sequences.
For more detailed information on programming the terminal, refer to
the VGB20/VGB25 Video Terminal Programmer Information.

Environment
Note
This product has been designed and manufactured to minimize
the impact to the environment. The packaging is recyclable
and the terminal can be returned for proper disposal. The
terminal also has power management features that exceed
the Environmental Protection Agency (EPA) Energy Star
requirements for saving energy.

Before You Start
A small flat-blade screwdriver may be needed to install the
communication or the printer cables.

Conventions
The following conventions are used in this document:
Convention
Caps Lock

Lock

Meaning
Print Screen

Indicates two keys that you must press in
combination. Press and hold the first key while
you press the second key.
Indicates two keys that you must press in
sequence. Press and release the first key before
you press the second.

Caps Lock Alt F11

Indicates three keys that you must press in
combination, holding the first two down while
pressing the third.

kpd

Indicates a key on the numeric keypad.

Proper Setup and Use
Important Information
Certain recent scientific literature suggests that poor posture, work
habits, or office equipment setup may cause injuries. Other literature
suggests that there is no cause and effect. Because the safety of
our users is a great concern, it is important to take the precautions
described in Table 1.
If you experience pain or discomfort while using the terminal, take a
substantial break and review the instructions for posture and work
habits. If your pain or discomfort continues when you resume using
the terminal, discontinue use and report the condition to your job
supervisor or physician.

Table 1 Recommendations for Proper Setup and Use
Adjust

So that your . . .

Chair

Feet are flat
on the floor
or footrest, if
needed.

Legs are vertical
forming a right
angle to the
floor.

Weight is off
your thighs
and are in
a horizontal
position. Keep
the back of your
knees away
from the seat
so you do not
compress the
area behind
them, which
could restrict
the blood flow.

Upper body is
erect and your
lower back is
supported with
a backrest.

Wrists are
straight and
do not flex
more than 15°.
They may be
supported but
should not rest
on sharp edges.

Keyboard

(continued on next page)

vii

Table 1 (Cont.) Recommendations for Proper Setup and Use
Adjust

To . . .
6

Keep your upper arms straight down at your sides, elbows
close to your sides to support your arm weight. Forearms
should be at a 70° to 90° angle.

Head

Avoid neck strain. Your head should incline downward, but
no more than 15° to 20°.

Terminal

Keep eye level and the correct distance for proper vision.

Eyes

Avoid eye fatigue, which can be caused by glare, image
quality, uncomfortable furniture, eye height, and
uncorrected vision. If you cannot read the screen at
different distances, you may need special glasses. Relax
your eyes periodically by looking at distant objects.

Work
Breaks

Take periodic work breaks. Morning, lunch, and afternoon
breaks meet most recommendations. Take advantage of
work breaks to move around and do other movements.

Lighting

Avoid direct lighting or sunlight on the screen, which
causes glare and reflections. The terminal screen has an
antiglare treatment to reduce glare. Place lighting behind
or to the side of your work area, and distribute the lighting
evenly on your work area. Adjust the terminal brightness
and the contrast controls as needed.

Noise

Keep background noise at a minimum. Background noise
above 65 dBA is tiring. Sound-absorbing materials, such
as curtains, carpeting, and acoustic tile, can help reduce
background noise.

Temperature

20°C to 23°C (68°F to 74°F)

Humidity

30% to 70%

Ventilation

Provide adequate air ventilation for equipment operation
and to avoid fatigue.

Space
between
terminals

More than 70 cm (28 in) center to center, preferably more
than 152 cm (60 in).

viii

1
Installation and Set-Up
1.1 Installation
Install the tilt/swivel stand.
1. Insert the hooks on the stand into the slots at the bottom of the
terminal.

DSG-000375

2. Slide the stand to the right until it is locked by the two tabs at
the bottom of the terminal. (To remove the stand, press the two
tabs.)

Installation and Set-Up 1–1

Installation and Set-Up
1.1 Installation

DSG-00037 7

Connect the cables to the terminal.
Connect the cables to the terminal as shown, and plug the power cord
into an ac electrical outlet.

2
3

Comm 1, Comm 2 ( ) (f),
Parallel printer, ( ) (f),
Comm 3 (m) (Serial printer),
Keyboard,
Power cord.

1–2 Installation and Set-Up

Installation and Set-Up
1.1 Installation
Push the power switch on.

1
2

Power,

Contrast,

Brightness

Power Up Selftest
The terminal takes a few seconds to warm up and complete its power
up self-tests. Then, the terminal should display ‘‘Selftest OK.’’ If a
problem occurs, go to the Appendix A.

Installation and Set-Up 1–3

Installation and Set-Up
1.1 Installation
Keyboards
Figure 1–1 VT Keyboard Layout
No rt h A m erican /U n it ed K in g d o m ( Wo rd P r ocessing V er sion)
F5

F10

^
6

*
8

(

)

Tab

Ctrl

>
<

Shift

Compose
Character

7
Y

:
;

Alt
Function

F12

+
=

>
.

<
,

F11

F13

Help

F14

}

]

(ESC)

}

]

Return

Find

Insert
Here

Remove

Select

"
’

?
/

Shift

F17

F18

F19

F20

PF1

PF2

PF3

PF4

Compose
Character

Enter

MA-1520a-92.PS

Figure 1–2 PC-Style Keyboard Layout
North American

di gi tal
Esc

F11

F10

F12

Print
Screen

Scroll
Lock

SetUp

Pause

Break

Num Lock

*
8

^
6

7
Y

(

)

_
-

:
;

+
=

BackSpace

}

]

Tab

}

]

Insert

Home

Page
Up

Delete

End

Page
Down

Caps Lock Scroll Lock

Num
Lock

Home

PgUp

+
Caps
Lock

Shift

<
,

>
.

"
’
?
/

Enter

Shift

End

3
PgDn
Enter

Ctrl

Alt

Altl

Ctrl

0
Ins

.
Del

GSF-MK2510-29-DG

LJ-00226a-TI0.PS

1–4 Installation and Set-Up

Installation and Set-Up
1.2 Set-Up

1.2 Set-Up
Overview
Use Set-Up to examine or change the terminal operating features.
The Set-Up menu summary at the bottom of the screen are the
communication features to get you started in operating the terminal.
There are many more Set-Up features in the terminal that you may
wish to change.
Before changing the communication Set-Up features, contact your
System Manager if necessary.
Printer operations are suspended upon entering Set-Up and are
resumed upon exiting Set-Up.
Entering/Exiting Set-Up
To enter or exit Set-Up, perform the following procedures:
On a . . .

Press . . .

Refer to . . .

VT keyboard

Figure 1–1

PC keyboard

Caps Lock

Print Screen

Figure 1–2

Installation and Set-Up 1–5

Installation and Set-Up
1.2 Set-Up
Moving within a Set-Up Menu
Use the arrow keys ( ,
,
,
within a list, or to select buttons.

In a
menu . . .

) to move among the menus or

Indicates . . .
A pull-right submenu is available.

...

A dialog box is available for you to specify more information.

a
b
c

The menu item with the filled-in circle is enabled. Only one
of these items can be enabled at a time.
The menu item with the checkbox is enabled.

Press Enter Return Do or Select to start the action or to choose the
currently highlighted feature.
A dimmed menu item does not apply to the currently selected mode.
Caution
If you disable the Display CRT Saver feature, an image
may etch onto the screen, which may shorten the terminal’s
useful life.

1–6 Installation and Set-Up

Installation and Set-Up
1.2 Set-Up
Select the Set-Up language.
This language selection is for Set-Up only and does not affect
keyboard, character set, or printer settings. As you make changes
to some Set-Up parameters, the Set-Up summary line will reflect
those changes.

MA047093.GRA

Port selected,
Transmit speed (9600), Parity (N), Word
size (8), Stop bits (1),
Character set,
Keyboard language,
Emulation mode,
Firmware version.

Installation and Set-Up 1–7

Installation and Set-Up
1.2 Set-Up
Configuration
The VGB20 allows you to open up to four sessions depending on the
communications connections and the host software. As a minimum for
each session (S1, S2, S3, and S4), determine the following menu items,
and note any change here that you make from the default value.
Menu item

Default

Terminal type
Emulation mode

VT520

Keyboard
language

English

Keyboard

Communication
Port select

See Figure 1–3.

Communication
Word size

8 bits

Communication
Parity

None

Communication
Transmit speed

9600 baud

Communication
Receive speed

Transmit
speed

Printer

ANSI1

Printer type

1 American National Standards Institute

1–8 Installation and Set-Up

Installation and Set-Up
1.2 Set-Up
Notes
For a session to be enabled, it must be assigned to a comm
port. If you assign more than one session to the same comm
port, you must use a terminal server that supports Terminal
Device Session Management Protocol (TD/SMP), or a host that
supports Session Support Utility (SSU).
A port cannot be assigned as both a comm port and a printer
port at the same time.
Selecting Comm = ‘‘ none’’ disables a session. A session that
is dimmed is disabled, but it can still be configured in Set-Up.

Figure 1–3 Communications Port Set-Up Screen

MA047493.GRA

Installation and Set-Up 1–9

Installation and Set-Up
1.2 Set-Up
Save your settings.
Use one of the following procedures:
Save . . .

Select menu item . . .

Active session only

Save settings

All sessions

Session

Save settings for all

Then, press Enter or Return .
Restore previously saved settings.
Use one of the following procedures:
Restore . . .

Select menu item . . .

Active session only

Restore settings

All sessions you saved

Session

Factory defaults for all
sessions

Action

Then, press Enter or Return .

1–10 Installation and Set-Up

Restore settings for all
Restore factory defaults

2
Multiple Sessions
2.1 Overview
Multiple sessions extends the VGB20 to act like four terminals in one.
A session is an active connection between the terminal and a host
system. See Figure 1–3.
The VGB20 supports up to four sessions using virtual terminals.
Each virtual terminal maintains the full keyboard and display state
of a real physical terminal but shares a single keyboard and display
with other virtual terminals. Before you can login using a virtual
terminal, it must be connected to a host computer.
VGB20 session virtual terminals can be connected directly to a host
computer through any of the three serial communication ports on the
back of the terminal. Since there are only three comm ports, this
method alone can only support three sessions.
To use a fourth session or to reduce the number of serial comm lines
needed, more than one session must be connected through a single
comm port. The VGB20 allows this using a session management
protocol, called TD/SMP (Terminal Device/Session Management
Protocol). TD/SMP allows two or more sessions to share a single
comm line, as long as the other end of the comm line supports the
protocol. To enable TD/SMP at the terminal, you simply assign more
than one session virtual terminal to the same comm port in Set-Up.
TD/SMP is available on most terminal servers or host systems with
SSU software. If you are using a terminal server, check with its
documentation to determine if it can run TD/SMP.

Multiple Sessions 2–1

Multiple Sessions
2.2 Using a Terminal Server with TD/SMP

2.2 Using a Terminal Server with TD/SMP
At the Local> prompt, enter the following command:
Local> set port multi enable

Return

Continue with your login procedure.
To permanently set a terminal server port to use TD/SMP, type:
Local> define port multi enable

Return

2.2.1 Using SSU Host Software
If your VGB20 is connected directly to a host computer without a
terminal server, you can still use TD/SMP by running the Session
Support Utility (SSU) on your host computer. On a system that has
SSU software, such as OSF/1 or OpenVMS, enable sessions as follows:
$ SSU ENABLE

Return

2.2.2 Opening Another Session
Once TD/SMP is enabled, you can open a new session and switch
between them as follows:
1. Press the F4 (Session) key on a VT keyboard; or press
Caps Lock 0 kpd on a PC keyboard.
2. To go directly to a particular session, press Caps Lock 1 , 2 , 3
or 4 on the numeric keypad. The session number for the current
session is displayed at the lower left of the screen.

2–2 Multiple Sessions

Multiple Sessions
2.3 Tips for Using Multiple Sessions

2.3 Tips for Using Multiple Sessions
•

You can display data from two sessions at the same time by
dividing the screen into two windows. Press Ctrl F4 (Session) or
Ctrl Caps Lock 0 kpd to change the window configuration.

•

When you choose Display Framed windows, you can assign
a 30-character name to each session for the window title bar.
The first 12 characters of the session name become the session
icon name. If the title is a valid host or service name, a terminal
server will try to automatically open a connection to that service.

•

If you allow a session to be updated from the host, when new data
is received that has not been displayed, the session icon at the top
of the screen blinks.

•

To enable two or more sessions to use the same settings, configure
either one, then use Copy settings from in the session menu to
copy the desired settings to other sessions.

•

You can control the number of pages of display memory available
to each session from Set-Up by using the Pages per session...
dialog. The typical terminal has eight pages total. Before you
increase pages in one session, you may need to reduce the pages
assigned to other sessions. Any data on pages affected will be
erased.

•

If the session context between the terminal and host is lost due to
a power failure or other interruption, you can usually restore the
previous session context without starting over by pressing F4 or
Caps Lock 0 kpd.

•

The terminal automatically enables session management when
you assign more than one session to a single comm port.

Multiple Sessions 2–3

3
Desktop Features
3.1 Invoking Desktop Features
Overview
From the Actions menu, you can invoke Clock, Calculator, Show
character sets and the Banner message. When the feature is
highlighted (displayed in reverse video), press Enter or Return to
enable the feature. A quick start summary of some keyboard features
is provided, as well as how to implement the Accessibility Aid
feature and the Copy and Paste function. You can copy and paste
within a session and between sessions. Within Set-Up, there are
many more features like Review previous lines on a page and check
the screen alignment.

MA06993.GRA

Desktop Features

3–1

Desktop Features
3.1 Invoking Desktop Features
While these desktop features are enabled, other terminal functions
are disabled. Press Ctrl Z , F10 , Exit , or Esc to exit the feature.

3.1.1 Clock feature
You can enable the Clock feature without entering Set-Up by pressing
Caps Lock Alt F11 if you are either in a VT or an SCO console emulation
mode.
The current time is displayed in the status line if this feature is
enabled. The format is HH:MM, followed by AM or PM if the 12-hour
format is selected. Use the following keys within the clock feature:
Key

Function
or Tab

Go to next field.

or Shift Tab

Go to previous field.

Move within a field.

Return or Enter

If desired, check the 24-hour format box. For
example, before entering 13:00, enable 24-hour
format.

A or P

For 12-hour format, set the time to morning by
pressing A or P for afternoon.

Caps Lock Enter

Input the clock time at the cursor position and
exit the clock.

If the clock feature is enabled, then the alarm sounds for five seconds
or until a key is pressed. Each alarm message can be up to 20
characters and will be displayed in the status line until a key is
pressed. If the hourly chime is enabled, then the terminal will beep
once every hour. In Set-Up, select the Save settings menu item to
save the time format. The clock feature is disabled when the terminal
is turned off.

3–2 Desktop Features

Desktop Features
3.1 Invoking Desktop Features

3.1.2 Calculator feature
If you are either in a VT or an SCO console emulation mode, you can
enable the Calculator feature without entering Set-Up by pressing
Caps Lock Alt F12 .
In addition to the numbers on the numeric keypad, you can use the
following keys with the calculator:
Key

Function

H , O , or D

Selects hexadecimal H , octal O , or decimal
D format.

Arrow keys

Move the position of the calculator on the screen.

Shift

Changes the keypad display to allow selecting
STO , RCL , 1/x , X² , and Insert Result .

Alt

Changes the keypad display to hexadecimal and
allows selecting A through F kpd.

C/E

Clears the entry.

STO

Stores the number in the display into memory.

RCL

Recalls the number from memory and places it
in the display.

Shift Enter

Inserts the result at the current cursor position
after exiting the calculator feature.

All calculator math operations have equal priority except  and
 2 . If a result is wider than the display, then a rounded number will
be displayed. The non-rounded result will continue to be used in
subsequent calculations. The decimal point cannot be used with the
hexadecimal mode.

Desktop Features

3–3

Desktop Features
3.1 Invoking Desktop Features

3.1.3 Show Character Sets feature
If you are in either a VT or an SCO console emulation mode, you can
enable the Show character sets desktop feature without entering
Set-Up by using Caps Lock Alt F10 . When the character set is displayed,
you can use the following keys with this feature:
Key

Function

Next or Prev
Page Up or Page Down

Looks through the available character sets.

Shift A

Restores the character set.

Shift L

Displays the line drawing character set, if you
are using a VT character set.

Shift T

Displays the technical character set.

Shift Enter

For the current character set, inserts the
highlighted character into text at the current
cursor position, if you are using a VT character
set.

3.1.4 Banner message
The Banner message is the message that is displayed when you turn
the terminal on. You can change this message as desired. From the
Actions menu, select Banner message....
1. Press Return or Enter to display a dialog box.
2. Enter your banner message.
3. Press the

to select the

button.

4. Press Return or Enter to return to the Set-Up menu.

3–4 Desktop Features

Desktop Features
3.2 Keyboard Summary

3.2 Keyboard Summary
The following table provides a quick start summary of some keyboard
features.

To . . .

VT Keyboard,
press . . .

PC Keyboard,
press . . .

Hold the screen

Scroll Lock

Print the screen

Print Screen

Enter/Exit Set-Up

Caps Lock

Switch session

F4 or Caps Lock 0

Caps Lock 0 kpd

Select specific session

Caps Lock 1, 2, 3,

Print Screen

Caps Lock 1, 2, 3, or

or 4

Break

Caps Lock Pause

Toggle split screen

Ctrl F4

Adjust window size

Ctrl Shift

Pan or Review previous lines

Ctrl

Caps Lock 0 kpd

Ctrl

Ctrl Shift

Ctrl

Copy and paste:
Start copy
Move to beginning of text

Hold down F1 †

, or

Hold down Scroll Lock

, or

Select beginning of text

Select ‡

Home ‡

Select end of text

Remove

End

Finish copy

Release F1

Release Scroll Lock

F1 Insert Here

Scroll Lock Insert

Move to different session
if desired.
Paste

†For SCO console, press Caps Lock F1 .
‡If you press the Select key (or Home key) twice, the keyboard will toggle the copy
direction between left-to-right and right-to-left directions for use with right-to-left
scripts.

Desktop Features

3–5

Desktop Features
3.2 Keyboard Summary
Accessibility aid
This feature allows a user with limited motor skills to use
modifier key combinations in a sequential manner rather than in
a simultaneous manner. All modifier key combinations are supported.
There are two operation states—Latch and Lock. The Latch state
affects only the next key pressed. When in the Lock state, all
keys pressed are affected by the modifier until you press the same
modifier key again or press any other modifier key twice. A small icon
indicating the state is displayed on the Keyboard Indicator Line or the
Status Line.
To enable:

Press any modifier key five times.

Latch state:

Press any modifier key once.

Lock state:

Press any modifier key twice.

To disable:

Press and hold a modifier key while you press
another key.

Review previous lines
In Set-Up or through software, you can allocate the pages are assigned
to each session, up to a total of eight pages. When Review previous
lines is selected, the page memory allocation for a session becomes a
single page and a scroll back buffer. You can then use Ctrl and Ctrl
keys to scroll up or down to review lines previously scrolled off the
screen. (Note: When this feature is enabled, the host cannot write to
specific pages, and control codes from the host are ignored.)

Screen alignment
With this feature, you can use the arrow keys to adjust the screen
position.

3–6 Desktop Features

4
Defining Keys
4.1 Define Key Editor
Overview
This terminal provides a powerful Define Key Editor that allows you
to modify the function of keys on your keyboard. Since keystrokes
can perform many different functions, it will take some practice to
understand how the keys work. This section is an introduction to
customizing your keyboard.
Moving Standard Functions
The simplest way to re-program a key is to copy the behavior of
another key. The following method allows you to move factory default
key functions to any position on the keyboard:
1. From the Keyboard menu item, select the Define key . . .
function, and the Define Key Editor menu will appear.
2. Press the key you want to define.
3. Choose Copy of key default and press Enter .
4. Press the key you want to copy.
5. Choose the OK or Apply button and press Enter .
Names are displayed in the Set-Up language selected (not according
to the keyboard language). They are truncated to 12 characters in
the definition field. The ± symbol indicates a toggle feature. Copying
does not affect the function of the key being copied. The terminal
always copies the standard function of the chosen key, even if you
have redefined that key. You can undo a mistake by copying the
default values of a key to itself.
Defining Keys 4–1

Defining Keys
4.1 Define Key Editor
Function Keys
Function keys are used to transmit function key sequences or to
perform local terminal functions such as the arrow keys ( , , , ),
the Shift modifier key, or the key that calls up the Set-Up menu (F3).
A User Defined Key (UDK) is a special function key.

Modifier Keys
A modifier key is a key that modifies the behavior of other keys when
it is pressed and held down. For example, pressing an alphanumeric
key in combination with the Shift modifier key will normally send the
shifted or uppercase characters for that key.
Modifier keys are treated as a special kind of local terminal function.
The function modifier keys are: Shift , Ctrl , and Alt . Alphanumeric keys
can also be modified by pressing Group Shift ( Alt Gr on enhanced PC
keyboards) and Alt Shift (Shift-2). Modifier keys themselves cannot
normally be modified by other keys. A key assigned to act as the
Shift modifier, for example, cannot transmit a function sequence when
pressed in combination with the Alt key. Defining a key as a modifier
key makes all assignable combinations of that key act as a modifier.
Example: Changing the <x key to delete when unshifted and to
backspace when shifted.

4.1.1 Creating a New Function
To define a new function key within the Define Key Editor:
1. From the Keyboard menu item, select the Define key . . .
function, and the Define Key Editor menu will appear.
2. Press the key you want to define.
3. Choose the Function button and press Enter . A screen similar to
Figure 4–1 is displayed.
4. Press the modifier key sequence you want to define (unshifted,
shifted, control, and so on) and press Enter .
5. Choose the desired function from the Select function scroll box
and press Enter .

4–2 Defining Keys

Defining Keys
4.1 Define Key Editor
Figure 4–1 Define Key Editor, Select Function

MA−0324−93.GRA

6. Repeat steps 4 and 5 to define other modifier sequences.
7. Choose the OK or Apply button and press Enter .
Example: Disabling the Compose , Break , or Set-Up key by assigning
them to have no function.

4.1.2 Creating a Key Sequence
To define a key sequence:
1. From the Keyboard menu item, select the Define key . . .
function, and the Define Key Editor menu will appear.
2. Press the key for which you want to define.
3. Choose the UDK button at the upper left and press Enter .
4. Choose the modifier sequence you want to define (unshifted,
shifted, control, and so on) and press Enter .

Defining Keys 4–3

Defining Keys
4.1 Define Key Editor
5. Enter a key sequence, such as a print queue.
Example: Print my file
6. Press the

key to select where the sequence is to be sent:

Normal

To video screen and/or host depending on communication setting (on-line, half-duplex, local).

Terminal only

To video screen only.

Host only

To central host computer.

7. Choose the OK or Apply button.
NOTE
Pressing the Set-Up key to exit Set-Up will activate the OK
button to keep any changes you have made. If you redefine a
key, you can always restore the default key functions from the
Actions menu in Set-Up.

4–4 Defining Keys

A
Maintenance and Troubleshooting
A.1 Cleaning your Video Terminal
Cleaning the Screen
Before cleaning the screen, set the terminal power switch to the off
position and wait 20 seconds to let static electricity dissipate.
Clean the screen with a video screen cleaner.
Cleaning the Keyboard
If needed, wipe the keys with a soft cloth. Do not allow moisture to
get under the keys.

A.2 Troubleshooting
Identifying and Correcting Problems
The following can be sources of problems:
•

Communications cables

•

Host system

•

Power or electrical sources

•

Adjustment of brightness or contrast controls

Maintenance and Troubleshooting A–1

Maintenance and Troubleshooting
A.2 Troubleshooting
Troubleshooting Table
Use Table A–1 to identify and correct any problem areas.
Table A–1 Identifying and Correcting Problems
Symptom

Possible Cause

Suggested Solution

The printer will
not print.

Communication
port is not set
correctly.

From the Communication menu
item, choose Port select and
match the connections on the
terminal.

If you have a
serial printer,
its speed may be
set incorrectly.

From the Printer menu item,
choose Serial print speed and
match the setting to the one in
your printer manual.

Modifier keys
remain in effect
after released.

Accessibility aid
is enabled.

Check keyboard indicator line for
icon. This feature is enabled by
pressing any modifier key five
times. To disable, press and hold
a modifier key and then press
another key.

Screen is blank,
but the LED is
blinking.

Power Management
feature is active.

Press any key on the keyboard.
The monitor may need time to
warm up.

A–2 Maintenance and Troubleshooting

Maintenance and Troubleshooting
A.3 Installing the ROM Cartridge

A.3 Installing the ROM Cartridge
Introduction
The terminal can accommodate an optional ROM cartridge at the
back of the terminal. This ROM cartridge will completely supersede
the factory-installed software within the terminal for new software
versions or special applications.
When an option ROM is not used, the ROM cartridge holder is empty
with a cover over it.
Installing and Removing the ROM Cartridge
To install a ROM cartridge:
CAUTION
To prevent damage to the terminal, set the power switch to the
off position before installing or removing the ROM cartridge.

1. Set the power switch to the off position.
2. Remove the cartridge by lifting the cover from the bottom and
gently pulling it straight back.
3. Plug in a ROM cartridge with its attached cover and close the
cover.
If you are having the terminal serviced, then remove and save
the ROM cartridge. To remove a ROM cartridge, lift its cover from
the bottom and gently pull it straight back.
To restore the firmware from the ROM cartridge:
1. Turn the power on and press
2. Select Actions

F3 .

Restore factory defaults and press Return .

3. Select Save settings and press Return .

Maintenance and Troubleshooting A–3

B
Specifications
Video Terminal
The following are the specifications for the VGB20 video terminal.
Dimensions
Height

32 cm (12.6 in)

Width

31.5 cm (12.4 in)

Depth

33 cm (13 in)

Weight

7.9 kg (17.4 lb)

Tilt Range

25° (5° forward, 20° backward)

Swivel Range

± 90° (left and right)

Display
Cathode ray tube
(CRT)

35 cm (14 in) diagonal antiglare flat-profile
screen

Overscan

72 Hz, 800

432, 88 DPI, 10

16 font

Non-overscan

72 Hz, 802

480, 88 DPI, 10

16 font

Usable area

17 cm (6.7 in)

No. of lines

25, 42, or 53 data lines

Page size

Selectable 24, 25, 36, 42, 48, 50, and 72 lines
(emulation dependent)

23 cm (9 in); 1:1.4 aspect ratio

Operating Systems
Supported

UNIX, MDOS, OpenVMS, OSF, ULTRIX, VMS,
or any other that supports ASCII or ANSI
protocols.

Terminal Emulations

ANSI, PCTerm, and ASCII emulations: VT,
WYSE, TVI, ADDS, or SCO console.

Specifications B–1

Specifications

Character Set Support

Multiple languages using ISO and IBM code
pages; Set-Up selectable in five languages.

Productivity Features

Local copy and paste
Time-of-day clock—sound alarms and display
messages; insert time into text.
Desktop calculator—insert result into text
Show character sets—insert character into text

ROM cartridge support

4-Mbit (512 K byte) customer-installable ROM
cartridge that completely replaces the factoryinstalled ROM code for new versions of the
terminal’s firmware.

Electrical Requirements
AC input voltage

110, 120, 220, 230, 240 Vac auto-sensing single
phase, 3-wire

Line frequency

47 Hz to 63 Hz

Power consumption

15 watts maximum

Operating Temperature

10°C to 40°C (50°F to 104°F)

Humidity

10% to 90% relative humidity
Maximum wet bulb = 28°C
Minimum dew point = 2°C (noncondensing)

B–2 Specifications

Specifications

Keyboard
The terminal is designed to support industry-standard PS/2
compatible keyboards. Due to the large number of keyboard
variations, it is not possible to test all of them in advance.
Keyboards from some manufactures may not function
correctly due to differences in their implementation of the
standard.
Keyboard style

ANSI style layout; enhanced PC 101/102 style
layout; available for most European languages.

Protocol

IBM enhanced PS/2-compatible

Connector

PS/2-style, 6-pin mini DIN

Keyboard keys

All keys are programmable for single characters,
character sequences, or local functions.

Compose characters

Compose character are available in Multinational,
ISO Latin 1, ISO Latin 2, ISO Latin-Greek, and
National Replacement character sets (NRCS) for
VT keyboards, except Canadian-English, Danish,
Dutch, Hebrew, Hungarian, Italian, Norwegian,
Polish, Romanian, Russian, SCS, Turkish-F,
Turkish-Q, UK, and US keyboards.

Nonvolatile memory

970K bytes memory
User-defined key maximum length = 255 bytes.

Specifications B–3

Specifications

Communication/Printer Ports
Serial

Bidirectional serial communication/printer ports with full modem
support at 300 to 115.2K baud:
EIA 232
1

Comm 1 (Figure B–1):
25-pin D-sub f
Comm 2 25-pin D-sub f
Parallel

EIA 423
Comm 3 (Figure B–2):
9-pin D-sub m

Centronics (25-pin D-sub f) parallel printer connector (Figure B–3).

1 An MMJ adapter can be used on Comm 1 for EIA-423 communication cables with a
maximum cable of 76 m (250 ft).
m = male; f = female

Figure B–1 Comm1 and Comm2—Serial Communication/Printer
Ports

14
14

25
25

13
13

CCITT/EIA/DIN
1 GND
2 TXD L
103/BA/D1
3 RXD L
104/BB/D2
4 RTS
105/CA/S2
5 CTS
106/CB/M2
6 DSR
107/CC/M1
102/AB/E2
7 SIG GND
8 CD
109/CF/M5
112/CI
12 SI
20 DTR
108.2/CD/S1.2
23 SPD SEL L
111/CH/S4
9−11, 13−19, 21, 22, 24, 25 NC 1
MA−0019A−93.GRA

B–4 Specifications

Specifications

1 NC = not connected.

Figure B–2 Comm3—9-Pin EIA 232 Port

9
6

1 NC
2 RXD
3 TXD
4 DTR
5 SIG GND
6 DSR
7 NC
8 NC
9 NC

CCITT/ EIA/ DIN
−
104/BB/D2
103/BA/D1
108.2/CD/S1.2
102/AB/E2
107/CC/M1
−
−
−
MA−0021−93.GRA

Figure B–3 Parallel Printer Port (Bidirectional)
1
14

1 STROBE L
2 DAT <0>
3 DAT <1>
4 DAT <2>
5 DAT <3>
6 DAT <4>
7 DAT <5>
8 DAT <6>
9 DAT <7>

10 ACKNLG L
11 BUSY
12 PE
13 SLCT
14 AUTO FEED XT L
15 ERROR L
16 INIT L
17 SLCT IN L
18 − 25 GND
MA−0018−93.GRA

Specifications B–5

Specifications

Standards Conformance
Acoustic Noise Preliminary declared values per ISO 9296 and
ISO 7779:
Sound Power Level
L
Product

, B

Sound Pressure Level2
L

, dBA

Idle

Operate

Idle

Operate

VGB20

<3.9

<20

PCXAL

6.0

PC7XL

5.3

LK411

5.6

1 Current values for specific configurations are available from service representatives.
(1 B = 10 dBA.)
2 Operator position.

Table B–1 Standards Conformance and Approvals
Type

Standard

Subject

Communications

EIA 423
EIA 232-E

Serial communications

CCITT V.24 and V.28
NET 2 test report

Serial communications –
Australia PTT
German PTT
Japan PTT
Sweden PTT

CISPR-22 Class B

Electromagnetic compatibility

CSA 108.8

DOC Canada North American
Class B version

FCC part 15 Class B
Vfg 243/91,
Amd Vfg 46/92 Class B

Electromagnetic compatibility

EMI/RFI

(continued on next page)

B–6 Specifications

Specifications

Table B–1 (Cont.) Standards Conformance and Approvals
Type

Energy

Standard

Subject

CE Class B (EN55022
Class B, EN50082-1
Class 1) EN60555-2

Radio Protection Mark
CE label

ITE Class 2 (Japan)

VCCI Electromagnetic
compatibility

"Energy Star"

EPA Energy Star requirements

Alternative "A"

NUTEK energy requirements

Ergonomic

ZH1/618, GS-VS-SG7,
EN29241-3

TÜV Ergonomic Requirements

Safety

CSA 22.2 #950 M1989

Safety of Information
Technology Equipment
Including Electrical Business
Equipment (Canada)

AS3260

Australia product safety

DHHS rules 21 CFR,
Subchapter J

U.S.A. DHHS (FDA)

TÜV EN60950 (IEC 950)
2nd ed (1988)
EN60950 (Amd 1 & 2,
1990)
German X-Ray Act
RöV §5(2)
SS 436 14 90, MPR II;
VDE0805 and Amd

Safety of Information
Technology Equipment
Including Electrical Business
Equipment

EMKO-TSE (74-SEC)
203/92, DEMKO,
NEMKO, SEMKO

Nordic Country Approvals

UL 544 (2nd ed)

Standard for Medical and
Dental Equipment

GS-Mark (Geprüfte Sicherheit)

(continued on next page)

Specifications B–7

Specifications

Table B–1 (Cont.) Standards Conformance and Approvals
Type

Standard

Subject

UL 1950 (2nd ed)

Safety of Information
Technology Equipment
Including Electrical Business
Equipment

EMI Requirements for Canadian Market This equipment does not
exceed the Class B limits for radio noise emissions from digital
apparatus as set out in the Radio Interference Regulation of the
Canadian Department of Communications.
Asbestos Asbestos is not used in this product or in its manufacturing process.
Flame Retardants The thermoplastic enclosures do not contain
polybrominated diphenylether (PBDE) as a flame retardant additive;
therefore, they do not emit toxic dibenzofuran and dibenzodioxin
gases.
PVC The plastic enclosures are not made of rigid PVC. The material
has a non-halogenated, flame-retardant system and is cadmium free.
Ozone Depleting Substance The VGB20 is in full compliance with
the labeling requirements in the U.S. Clean Air Act Amendments of
1990. It does not contain, nor is it manufactured with, a Class 1 ODS,
as defined in Title VI Section 611 of this act.
Disposing of your Terminal
Warning
If you need to dispose of your terminal, ask a qualified service
representative for the proper disposal procedures. Improper
disposal could result in personal injury. The terminal can be
returned for proper disposal.

B–8 Specifications