Xerox Diablo 1620 User manual

XEROX
82332 Rev. G
Diablo Systems Incorporated
A Xerox Company
HyTerm Communications Terminal
Model 1610/1620
Product Description
December, 1978

© Copyright 1976,1977,1978
Diablo Systems, I nco (A Xerox Company)
Hayward, California
94545
All rights reserved
"Diablo," "HyType," and "Xerox" are registered trademarks of Xerox Corporation.
"HyTerm" is a trademark of Diablo Systems, Inc.

PREFACE
This manual provides the information necessary to operate,
interface, and install the Diablo Model 1610 and Model
1620 HyTerm Communications Terminals.
This revision supercedes all previous revisions, and includes
the information contained in Addendum A1, issued on
8-20-76, Addendum C1, issued on 5-26-77, Addendum D1,
issued on 9-30-77, Addendum F1, issued on 4-15-78, and
Addendum F2, issued on 4-25-78.
Comments on this manual and its use are welcome. Please
use the Reader Comment Form in the back of this manual.
Diablo Systems, Inc., reserves the right to make improve-
ments to products without incurring any obligation to
incorporate such improvements in units previously sold or
delivered. Features and specifications described herein are
subject to change without notice.
HOW TO USE THIS MANUAL
This manual is made up of five sections. Not every reader
will need to read the entire manual. The first section
provides a basic i.-.troduction to the HyTerm, and should be
read by anyone needing more information about the
terminal. Section 2 contains operating instructions, and is
meant primarily for the machine operator. Section 3
provides
more information on the functional characteristics
of the terminal, and is written primarily with the host
computer programmer or network designer in mind.
Section 4 contains detailed interface data, needed by
anyone planning to connect a modem or other device to the
terminal. Section 5 contains installation procedures; it is
designed for the installer and the installation planner. Those
desiring technical information on servicing the terminal
should refer to the Model 1610/1620 Maintenance Manual,
Publication No. 82333.

WARRANTY
The Diablo Model 1610 and Model 1620 HyTerm
Communications Terminals are warranted against defects in
materials and workmanship for 90 days from the date of
shipment. Any questions with respect to the warranty
should be directed to your Diablo sales representative.
All requests for repairs should be directed to the Diablo
repair depot in your area. This will assure you of the fastest
possible service.
ii

TABLE OF CONTENTS
PARAGRAPH
SECTION' - GENERAL DESCRIPTION
1.1 Introduction .
1.2 Main Features.
1.2.1 Printer
1.2.2 Switch Panels
1.2.3 Keyboard.
1.2.4 Commun ications Capability
1.3 Specifications.
1.3.1 Size...
1.3.2 Weight..
1.3.3 Power Requirements
1.3.4 Environ mental Requirements.
1.3.5 Printer.
1.3.6 Interface
1.3.7 Color..
1.4 Functional Features.
1.4.1 Control Codes.
1.4.2 Escape Sequences
1.4.3 Control Panel and Front Panel Switches
1.5 Optional Features
1.6 Accessories. . .
1.7 Related Documents
SECTION 2 - OPERATING INSTRUCTIONS
2.1 Introduction . . .
2.2 Switches, Indicators, and Controls
2.3
2.2.1 Front Panel
2.2.2
2.2.3
2.2.4
2.2.5
2.2.6
Control Pane I. .
Keyboard .
2:2.3.1 Alphameric Section
2.2.3.2 Numeric Section
2.2.3.3 Control Section .
Printer Controls .
Impression Control Switch
Cover-Open Switch
2.2.7 Paper-Out-Switch
Basic
Operating Procedures
2.3.1 Turn-On..
2.3.2 Loading Paper. .
2.3.2.1
Top-Feed Printer.
2.3.2.2 Bottom-Feed Printer
2.3.3 Establishing the Data Communications Link.
2.3.3.1 Originating a Data Link with an Acoustic Coupler
2.3.3.2 Originating a Data Link with a Bell-Type Modem
2.3.3.3 Originate-Only Modems
2.3.3.4 Answering a Data Link Call
iii
PAGE
'·1
1·1
1·1
1·1
'·2
1·2
1·2
1·2
1·2
1·2
1·2
1·2
1·3
1·3
1·3
1·3
1·3
1·4
1·4
1·4
1-5
2·1
2·1
2·1
2·1
2·5
2·5
2·5
2·7
2·7
2·8
2·8
2-9
2·9
2·9
2·9
2·9
2·10
2·11
2·11
2·12
2-12
2·12

SECTION 2 - OPERATING INSTRUCTIONS (Continued)
2.3.4 Error Recovery ....
2.3.5 Keyboard Control of Features. .
2.3.5.1 Margins (ESC
9, ESC 0)
2.3.5.2 Carriage Movement
2.3.5.3 Paper Movement
2.3.5.4 Ribbon Control .
2.4 Operator Duties . . . . . . .
2.4.1 Replacing Ribbon Cartridge
2.4.2 Changing Printwheels
2.4.3 Changing Platens. . . .
2.4.3.1 Platen Removal .
2.4.4
2.4.3.2 Standard Platen (Friction-Feed) Installation
2.4.3.3 Pin-Feed Platen Installation
Forms Tractor
SECTION 3 - FUNCTIONAL DESCRIPTION
3.1 Introduction . .
3.1.1 Local/Remote
..
3.2 Communications Princi pies
3.3 Reset/In itialization . . .
3.4 Character Generation
3.4.1 Two- and Three-Character Sequences
3.5 Printing Format . . . .
3.6
3.5.1
Definition of Terms. . . .
3.5.2 Standard Formats
3.5.3 Optional Formats (Variable Indexing)
3.5.3.1 Variable HMI
3.5.3.2 Variable VMI
Control Functions
3.6.1 Control
of Printing .
3.6.1.1 Red/Black Printing (ESC
A/ESC B) .
3.6.2 3.6.1.2 Upper
Case On Iy. .
Control
of Carriage Movement
3.6.2.1
Space (SP). . .
3.6.2.2 Backspace (8S)
3.6.2.3 Carriage Return (CR)
3.6.2.4 Horizontal Tabbing (HT,
ESC 1, ESC 2, ESC HT)
3.6.2.5 Graphics (ESC 3, ESC 4) . .
3.6.2.6 Forward/Backward Print (ESC 5/ESC
6)
3.6.2.7 Margins (ESC 9, ESC 0) . . . . .
3.6.3 Control
of Platen (Paper) Movement . . . .
3.6.3.1 Line
Feeds (LF, ESC LF, ESC U, ESC D)
3.6.3.2
Form Feed (FF) . . . .
3.6.3.3 Graphics (ESC
3, ESC 4) .
3.6.3.4 Vertical Tabbing (ESC
VT)
3.6.4 Other Control Functions . . . .
iv
2-12
2-13
2-14
2-14
2-14
2-14
2-15
2-15
2-17
2-19
2-20
2-20
2-21
2-21
3-1
3-1
3-1
3-1
3-1
3-1
3-3
3-3
3-3
3-3
3-4
3-4
3-4
3-4
3-4
3-4
3-5
3-5
3-5
3-5
3-5
3-6
3-6
3-7
3-7
3-7
3-7
3-7
3-7
3-8

SECTION 3 - FUNCTIONAL DESCRIPTION (Continued)
3.6.4.1 Sound Audible Alarm (BEL) .
3.6.4.2 Preventing Buffer Overrun (ACK, ETX, NUL, DEL)
3.7 Motion Minimization
SECTION 4 - INTERFACE
4.1 Introduction . .
4.2 Modem Compatibility
4.3 Functional Description.
4.4 Connection to the Modem.
4.5 Signal Levels .
4.6 I nterface Signals
4.7 Data Format .
4.8
Timing . .
4.9 Circuit Elements
4.9.1
Input Level Converter
4.9.2 Output Level Converter
4.10 Current - Loop Interface
SECTION 5 - INSTALLATION
5.1 Introduction .
5.2 Preliminary Inspection
5.3 Unpacking and Inspection.
5.4 System Requirements .
5.4.1 Operating Environment.
5.4.2
5.4.3
Space Requ irements .
Weight . .
5.4.4 Power Requirements
5.5 Installation Procedures.
5.5.1 Initial Start-up and Checkout.
5.5.2 Jumper Installation/Removal.
5.5.2.1 1200 Baud.
5.5.2.2 Ground Disconnect .
5.5.3 EIA Cable Assembly Connection and Remote Checkout.
5.6 Repackaging for Shi pment
Appendix A - ASCII Code Chart
Appendix B - Keyboard Layouts and Code Charts
v
3-8
3-8
3-8
4-1
4-1
4-1
4-3
4-3
4-3
4-4
4-5
4-5
4-5
4-6
4-6
5-1
5·1
5·1
5-1
5-1
5-1
5-1
5-1
5-1
5-3
5-3
5-3
5-5
5-5
5-5
A-1
B-O

LIST OF ILLUSTRATIONS
FIGURE PAGE
1-1
HyTerm Communications Terminal
1-0
2-1 Switches, Indicators, and Controls 2-0
2-2 Front Panel 2-1
2-3
Control Panel .
2-3
2-4
46-Key Typewriter Pairing Keyboard
2-4
2-5
Printer Controls
2-6
2-6
Cover-Open and I mpression Control Switches
2-8
2-6a
Paper-Out Switch Clip
2-9
2-7 Ribbon Clamps
2-15
2-8
Ribbon Advance Knob
2-16
2-9
Ribbon Cartridge Placement
2-16
2-10
Carriage Tilted for Printwheel Access 2-17
2-11 Printwheel Installation
2-18
2-12
Printwheel .
2-18
2-13 Platen Skirt Removal
2-19
2-13a Platen Removal
2-19
2-14
Pin-Feed Platen Installation
2-20
2-15 Plastic Clip and Stud
2-21
2-16 Forms Tractor
2-22
2-17
Forms Tractor and Platen Adjust Lever
2-22
2-18 Forms Tractor and Paper Release Lever (Tension Removed)
2-23
2-19
Forms Tractor and Paper Release Lever (Tension Removed)
2-23
2-20
Forms Tractor Installed
2-24
3-1
Printing Format Factors
3-2
4-1
Interface Functional Block Diagram 4-1
4-2
Interface Connector.
4-2
4-3 Input Line Switching Levels
4-3
4-4
Data Format on Interface
4-4
4-5
Input Converter IC
4-5
4-6
Output Converter IC
4-6
4-7
Current Loop Cable Pinout
4-6
5-1
Top Cover Release Lever 5-2
5-2
HPRO Board Location . 5-2
5-3
Jumper Location
5-4
5-4
Current Loop Connections
5-6
vi

TABLE
2-1
2-2
2-3
3-1
3-2
3-3
4-1
4·2
4-3
5-1
LIST OF TABLES
Front Panel Switches and Indicators
Control Panel. . .
Error Recovery
Standard Formats
Deci mal Values for ASCII Character
Control Functions . . . . .
I nterface Signals .
Interface Signal Terminology.
Interface· Data Timing . . .
Jumper/Shorting Plug Location
vii
PAGE
2-2
2-3
2-13
3-3
3-4
3-5
4-2
4-3
4-5
5-5

MODEL 1610
MODEL 1620
Figure 1-1. HyTerm Communications Terminal
1-0

SECTION 1
GENERAL DESCRIPTION
1.1 INTRODUCTION
Diablo Systems has combined the latest technology in
printers and microelectronics
to produce the HyTerm
communications terminal, Figure 1-1. The HyTerm is one
of the smallest and most convenient terminals built, yet it is
one of the most economical and versatile units available
today. The HyTerm transmits data to and receives data
from a distant device over a communication link via an EIA
Standard RS-232-C interface. In local operation, the
keyboard/printer can also serve as a document writer for
correspondence and other secretarial functions. As a com-
munications terminal, the HyTerm can function in a variety
of applications: in terminal-to-terminal communications, as
a computer console or output printer, as a terminal in a
time-sharing
network, as a console in a text-editing system,
etc.
The
HyTerm comprises a Diablo HyType II printer and
microprocessor-driven electronics,
contained in an attrac-
tive yet functional package. The HyTerm's modular design
provides
exactly the amount of capability needed in any
data
communications application. The HyTerm Model 1610
is a receive-only (RO) version, while the Model 1620 has
keyboard send/receive (KSR) capability. Both models
contain an integral power supply, making them a com-
pletely self-contained table top unit. The HyType II's
inherent speed and adaptability, and the microprocessor's
versatility, plus a
full complement of type styles and
optional forms-handling equipment, enable the HyTerm to
meet the most demanding data processing situations.
1.2 MAIN FEATURES
The HyTerm communicates using the U.S.A. Standard
Code
for I nformation Interchange (ASCII), and is compat-
ible with most other data communications devices utilizing
this code. It provides medium speed, high-quality printing
of all 94 printable ASCII characters on an original form and
up
to 5 copies. It is compatible with Bell type 103A and
113A modems and many other 110- to 300-baud asynchro-
nous modems employing the RS-232-C interface specifica-
tions set forth by the Electron ic Industries Association
(EIA).
The HyTerm represents an innovative approach to all
facets
of terminal design. For ease of maintenance, all
electronic components are contained on circuit boards that
plug into the HyType " printer. The capabilities inherent in
the design of the HyType II have been enhanced by the
microprocessor
control to provide unmatched versatility,
reliability, and speed. Functional capabilities reside in
pre-programmed Read-Only Memory (ROM), and not in
1-1
difficult-to-modify, space consuming, hard-wired random
logic. This makes several
functional features available
"free," which can be used when desired, but which "cost
nothing" even if they are not utilized. In addition, the
complete
flexibility of the HyType " mechanism is
maintained in the interface design so that appropriate
external commands can take advantage of the HyType's
graphics capability, its high-speed horizontal and vertical
tabbing, its non-left-margin returns, and its backward
printing capability.
1.2.1 Printer
The HyType II's innate qualities -its speed, versatility,
serviceability, reliability, and excellent print quality -are
complemented
by the microprocessor control to provide a
remarkable
printing system. The small number of moving
parts, the straightforward mechanical design, and the
modularity of the plug-in circuit boards are all contributing
factors. Interchangeable daisy-wheel type fonts provide
printing of 95 different characters at either 10 or 12
characters per inch. Rapid carriage and paper movement
provide high-speed horizontal and vertical tabbing. The
HyType II is capable of printing at a nominal speed of 45
characters per second (cps), even though it is usually driven
at only 10 to 30 cps by the communications link. Normal
graphics capabil ity provides horizontal resolution to 1/60"
and vertical resolution to 1 /48", but horizontal movement
in 1 /120" increments is available to provide wide variety in
the choice of printing format.
Microprocessor control of the preceding features adds
the capacity
for backward printing (elim inating carriage
return
time), absolute tabbing (tabbing directly to a
specified
print column or line without having previously set
a
tab stop), and "motion minimization." This latter feature
resolves a sequence
of carriage- and paper-movement
commands
to one single operation which moves the print
head via the shortest path to the position which would
result from performing each individual operation. All of
these factors contribute to increased throughput.
1.2.2 Switch Panels
Front panel switches provide for error RESET, and
control of FORM FEED, SET TOF (Top of Form),
SCROLL, and POWER. With these front panel switches
come
indicators for ER ROR and POWER, and an audible
alarm buzzer. A control panel is also provided for selection
of baud rate, auto line feed, parity, spacing, half/full
duplex, form length, and terminal reset/initialization.

1.2.3 Keyboard
Keyboard accommodations include choice of typewriter
pairing or logical bit pairing arrays, or several European
arrays, all with an auxiliary ten-key numeric pad. Addi-
tional features are provided by keyboard function keys,
e.g.,
Local/Remote, Upper Case Only, Break.
All keyboards utilize highly-reliable keyswitches with
n-key rollover, which means all key signals are transferred
to the microprocessor in the same sequence in which their
corresponding keys were depressed. Thus no useful key-
board data is ever lost, regardless of the speed at which the
keys are operated.
1.2.4 Communications Capability
The Hyterm can be interfaced to a data communications
network through a Bell type 103Aor 113A (or equivalent)
modem. An optional current loop interface is also available.
Time Division Multiplexed (TDM) or Frequency Division
Multiplexed (FDM) equipment may be used in place of a
modem, providing the multiplexing equipment has the same
interface characteristics as the above-listed modems. The
HyTerm communicates in either half-duplex or full-duplex
mode at rates of 110, 150, or 300 baud, which translate
into 10, 15, or 30 characters per second (cps) respectively.
Each incoming
character can be checked for proper parity,
and a parity bit is generated for each transmitted character.
Received characters pass through an input buffer having a
capacity of 158 characters, thus negating the need for
"pad" or time-fill characters in the received data. A simple
ETX/ ACK protocol is also built into the microprocessor
program, which can be used to guarantee no data loss
should the data contain large numbers of paper movement
commands or other codes that might slow down the
printer. Outgoing characters pass through an 8-character
transmit buffer.
A strappable option enables full-duplex data transmis-
sion/reception at 1200 baud (120 cps). This mode enables
the HyType II printer to operate at its full rated speed of
45 cps, and makes the HyTerm especially suited for use as a
computer console or local I/O device. When the 1200 baud
rate is used, the ETX/ACK protocol should be employed to
prevent data overrun.
1.3 SPECIFICATIONS
1.3.1 Size
Height
Width
Depth (KSR)
Dep'th (RO)
1.3.2 Weight
8.25 in.
23.25 in.
20.3 in.
15.7 in.
21.0 cm
59.1 cm
51.6cm
39.9 cm
48 Ibs. (21.8 kg), including covers and power supply.
1-2
1.3.3 Power Requirements
Two power supplies are available. The domestic version
requires 95 to 130 Vac, at 60 Hz. The export version
operates on 190 to 260 Vac, at 50 Hz. Both units consume
approximately 200 watts. A 12-foot (3.7-meterl power
cord is provided.
1.3.4 Environmental Requirements
Temperature Range MIN
(Degrees Fahrenheit/ MAX
Celsius)
Relative
Humidity
Range (at 80° F.
Maximum wet bulb
temperature, no
condensati on)
Altitude Range
1.3.5 Printer
MIN
MAX
MIN
MAX
Operating
45/7
95/35
10%
80%
Sea Level
10,000 ft/
3048m
Storage
-20/-29
135/57
0%
90%
Sea Level
25,000 ft/
7620m
(1) Print Speed: up to 45 characters per second on
average text, actual rate dependent upon baud rate
used.
(2)
Character set: 95 characters, variable depending upon
printwheel selected.
(3) Print line: 13.2 inches
132 columns @ 10 characters per inch
158 columns @ 12 characters per inch
(Variable spacing
capability standard)
(4) Paper width: 15 inches (38.1 cm) maximum.
(5) Paper thickness (one or more copies): up to .027"
(0.69 mm), manual selection.
(6) Carriage return time: 300 ms maximum.
(7) Horizontal tabulation: right or left, direct to
addressed print position.
(8) Vertical tabulation: up or down, direct to addressed
line.
(9) Line feed: either direction, full or half line. Normal
line spacing is 6 lines per inch (variable line spacing
capability is standard).

(10) Paper feed speed: 4 inches per second, plus 50 ms
settling delay. Paper is normally fed into the printer
from the back, like a typewriter, but a bottom-feed
option is available.
(11) Plotting resolution: horizontal, 60 positions per inch;
vertical, 48 positions per inch.
(12) Paper-out sensor: stops
HyTerm and signals operator
when
form supply is depleted.
1.3.6 Interface
Both models communicate using ASCII code, and
contain a 158-character receive buffer. The Model 1620
HyTerm contains an 8-character send buffer.
The data communications interface exhibits the follow-
ing characteristics:
(1) Electrically compatible
with EIA RS-232-C and
C.C.I.T.T. V-24.
(2) Functionally compatible with Bell 103A, 103E,
103F, 103G, 103H, 113A, and TDM or FDM
equipment.
(3) Full/Half Duplex.
(4) Even/odd/mark parity generation and error detection.
(5) Framing
error and overrun error detection.
(6) Baud rate: 110, 150,
or 300 standard; 1200 strap-
pable.
(7) ETX/ACK protocol capability standard.
(8) Ten-foot modem cable standard. Additional exten-
sion cables available.
1.3.7 Color
Standard color is Diablo textured warm black. Diablo
textured very light warm gray is also available.
1.4 FUNCTIONAL FEATURES
The microprocessor control and ROM resident micro-
program make available in the
HyTerm several functional
featu res which are either extra-cost options or not even
available on other terminals. Most of these functions are
utilized by sending the HyTerm either a single ASCII
control code or an "escape" sequence, which is the ESC
character followed by another ASCII character. Other
featu res, such as automatic line feed, 10 or 12 characters-
per-inch spacing, etc.,
are locally controlled via switches.
1-3
1.4.1 Control Codes
(1 )
BS
Backspace
(2)
CR
Carriage Return
(3)
HT
Horizontal Tab (to preset tab stop)
(4) LF Line
Feed
(5)
FF
Form Feed
(6)
ETX
Send ACK
(7)
BEL
Sound Audible Alarm
(8)
SP
Space
1.4.2
Escape Sequences
(1 )
ESC 1 Set horizontal tab stop
(2)
ESC2
Clear all tab stops
(3)
ESC 3 Graphics on
(4)
ESC4
Graphics off (CR also clears)
(5)
ESC 5 Forward
Print on
(6)
ESC 6 Backward
Print on (CR also clears)
(7)
ESC 8 Clear individual tab stop
(8)
ESC 9 Set
left margin
(9) ESCO Set
right margin
(10)
ESCA
Print in red
(11 )
ESC B
Print in black
(12)
ESC D Negative half-line feed
(13)
ESC U Half-line feed
(14)
ESC HT (n) Absolute
horizontal tab to position
(n).
(15)
ESC VT (n) Absolute vertical
tab to line (n)
(16)
ESC LF
Negative line feed
(17)
ESC RS (n) Define vertical spacing equal
to n-l
x 1/48 inch.
(18)
ESC US (n) Define
horizontal spacing equal to
n-1 x 1/120 inch.

1.4.3 Control Panel and Front Panel Switches
The following features can be selected locally via the
control panel switches.
(1) Half/Full Duplex
(2) Parity (even, odd or "mark")
(3) Auto Line Feed
(4) Spacing (10 or 12 characters per inch)
(5) Speed (baud rate), except 1200 baud
(6)
Form Length
(7) Clear (Reset)
The following features are available
through the front
panel switches:
(1) Form Feed
(2) Set Top of Form
(3) Error lamp
(4) Error Reset switch
(5) Power switch and indicator
(6) Scroll
1.5 OPTIONAL FEATURES
(1) Pin-feed platen
(2) Current-loop interface
(3) EIA extension cable
(4) Special keyboards (see Appendix B)
(5) Bottom forms-feed (includes paper-out sensing;
requires forms tractor)
1.6 ACCESSORIES
(1) Film ribbon, multi-strike
(2) Red/black cloth ribbon
(3) Printed circuit board extender
1-4
(4) Printwheels
*Courier 10
*Pica 10
*Elite 12
Manifold 10
Courier Legal 10
Prestige Elite Legal 12
Dual Gothic Legal 12
*Courier 72
Courier Legal 10A
Pica Legal 10A
French Prestige Cubic
German Pica 10
Scandia Elite 12
Kana Gothic Elite 12
Kana Gothic Pica 10
British Pica 10
UK Courier 10
APL10
General Scientific 10
Symbol 10
OCR A
OCR B
OCR B Kana 10
Russian Cubic 10
Norsk Pica 10
*Forms Gothic S-10
Printwheels above marked with an asterisk (*) are 100%
compatible with the 46-key typewriter pairing and 47-key
bit pairing keyboards. Other printwheels are compatible
with certain other keyboards; refer to Appendix B for
details. Any printwheel can be used with a given keyboard,
but some printwheel characters will differ from the
corresponding keyboard legends. In most cases, the alpha-
betic and numeric characters will be the same, and the
differences will be in some of the special symbols. Contact
yqur Diablo representative for details on any particular
printwheel.
Diablo is continually making new printwheels available;
refer to publication essos-XX for the latest listing and for
type samples of all currently available printwheels.

1.7 RELATED DOCUMENTS
(1) HYTERM COMMUNICATIONS TERMINAL,
MODEL 1610/1620, MAINTENANCE MANUAL,
June, 1976. Diablo Systems, Inc. Publication No.
82333.
(2) SERIES 1300 HYTYPE
II PRINTER PRODUCT
DESCRIPTION, January, 1976. Diablo Systems, Inc.
Publication No. 82402.
(3) SERIES 1300 HYTYPE II PRINTER PARTS CATA-
LOG, June, 1976. Diablo Systems, Inc. Publication
No. 82404.
(4) SERIES 1600 HYTERM TERMINAL PARTS CATA-
LOG, November, 1976. Diablo Systems, Inc. Publ ica-
tion No. 82334.
(5) INTERFACE BETWEEN DATA TERMINAL EQUIP-
MENT AND DATA COMMUNICATION EQUIP-
MENT EMPLOYING SERIAL BINARY DATA
INTERCHANGE. EIA Standard RS-232-C, August,
1969. Engineering Dept., Electronic Industries Assn.,
201 Eye St. N.W., Washington, D.C. 20006.
1-5
(6) "C.C.I.T.T. GREEN BOOK," Volume VIII, Data
Transmission, 1973. The International Telegraph
and
Telephone Consultative Committee, International
Telecommunication Union, Geneva.
(7)
USA STANDARD CODE FOR INFORMATION
I NTE RCHANGE, USAS X3.4-1977. American
National Standards Institute, 1430 Broadway, New
York, N.Y. 10018.
(8) DATA SET 103A INTERFACE SPECIFICATION,
February, 1967. Engineering Director, Data Com-
munications, American Telephone and Telegraph Co.
Publication 41101.
(9) 113-TYPE DATA STATION INTERFACE SPECIFI-
CATION, October, 1971. Engineering Director,
Transmission Services, American Telephone
and Tele-
graph Co_ Publication 41105.

PRINTER
ACCESS COVER CONTROL PANEL FRONT PANEL
KEYBOARD
Figure 2-1. Switches, Indicators, and Controls
2-0

SECTION 2
OPERATING INSTRUCTIONS
2.1 INTRODUCTION
Only general operating instructions are provided in this
section. Specific procedures are dependent upon the model
HyTerm being used and the options included, as well as the
application being performed and the characteristics of the
data communications network in which the HyTerm is
used. However, certain basic operating steps are the same in
all cases. These steps wi II be covered in th is section, as well
as steps required with certain optional equipment. Refer to
Section 3, Functional Description, for additional informa-
tion and for functions not covered in this section.
WARNING
Always keep hair, fingers, jewelry, etc.,
out of the area around the printwheel and
carriage. The high-speed printing mecha-
nism
of the HyType /I printer moves
much faster than an ordinary typewriter,
and since printing can be initiated
remotely, a sudden unexpected move-
ment could inflict injury. Be especially
careful when the access cover is removed,
as when changing ribbons, etc.
2.2 SWITCHES, INDICATORS, AND CON-
TROLS (Figure 2-1)
The more frequently used controls and indicators are
contained on the printer, the keyboard, and the front
switch panel which is just above the keyboard on the right
side. Others are contained on the control panel located
inside the printer; raise the printer access cover [see
2.2.4(6)]
to expose this panel. Generally, the control panel
switches are
adjusted before starting operation, and the
front panel, keyboard, and printer controls are used during
operation. The audible alarm is used mainly to indicate the
occurrence of an error.
2.2.1 Front Panel (Figure 2-2)
Table 2-1 describes the switches and indicators con-
tained on the front panel.
2.2.2 Control Panel (Figure 2-3)
Table 2-2 descri bes the switches located under the
printer access cover.
Figure 2-2. Front Panel
2-1

Name
ER ROR (indicator)
RESET
FORM FEED
SET TOF (Top of Form)
SCROLL
Audible Alarm
POWER (indicator)
POWER (switch)
Table 2-1. Front Panel Switches and Indicators
Function
Lights for any of the following error conditions: parity, overrun, framing,
printer cover open, check, out-of-paper. The last three errors are indicated
only if printing is attempted.
Turns off error lamp after the condition that caused the error has been
cleared. Resets errors (see audible alarm). (A printer check requires a clear
operation; see Table 2-2.)
Moves
paper up to the top line of the next form.
Operate this switch after installing forms and manually positioning them to
the first line. (Make sure the SCROLL switch is off.) This synchronizes the
HyTerm electronics to the form position. Operating this switch also loads the
setting of the FORM LENGTH switch (Table 2-2) into the HyTerm's
memory.
With this switch on, the paper moves up approximately one second after a
character is printed so that the printing can be easily seen. Before another
character is printed, the paper automatically moves down to align the printing
on the same line. When several characters are printed in succession, the paper
remains down until one second after the last character is printed. Turning this
switch off defeats the scroll feature. The switch should be off when inserting
paper and when setting the top of form.
Print quality may be affected if the scroll feature is used along with a forms
tractor or single-cam (undirectional) pin-feed platen. Since these devices are
not designed to move paper in the reverse direction, the printed line may
exhibit some waviness when the scroll feature is used. Also, if the form is
backed up over page boundaries (perforations), some bunching or jamming of
the forms may occur. For best results, a friction platen or a dual-cam
(reversible) pin-feed platen should be used.
NOTE
When the SCROLL switch is turned on, the paper
moves up immediately.
When it is turned off, the
paper does
not move down until the next character is
printed or the next printer function is performed.
Therefore, when inserting paper and setting top
of
form, if the SCROLL switch is on, first turn it off,
and then operate the space, ~arriage return, line feed,
or some other key, before attempting to align the
paper to the top line.
Sounds for 1/4 second for each new type of error. Additional errors of the
same type do not sound the alarm (unless errors have been reset), but the first
error of a different type will.
Also
sounds when BEL character is received or when printing exceeds right
margin. (This
can only occur when the right margin has been set at some print
position short of the "maximum.")
Lights whenever power is present in the HyTerm.
Controls ac power to HyTerm. When power is first applied, a clear operation
takes place.
2-2

Switch
FORM LENGTH
SPEED
SPACING
AUTO LF
PARITY
DUPLEX
CLEAR
Figure 2-3. Control Panel
Table 2-2. Control Panel
Function
This is a 12-position rotary switch used in conjunction with the SET TOF switch on
the front panel. This switch is set to indicate the size of the form being used and then
the SET TOF switch is depressed to load this value into the HyTerm's memory. (Make
sure the SCRO LL switch is off.) Form length can be one line, (1/6 inch) or 3, 3.5, 4,
5.5, 6, 7, 8, 8.5, 11, 12, or 14 inches. This switch must be set to correspond with the
size of form being used in order to allow form feeds and absolute vertical tabs to
operate properly. The setting of this switch is also loaded into memory automatically
at power on.
This is a three-position toggle switch that selects the data communications transmit/
receive speed of 10, 15, or 30 characters per second. It must be set according to
communications network requirements. If the HyTerm is wired for 120 cps speed, this
switch is non-functional.
This two-position toggle switch selects horizontal spacing of either 10 or 12 characters
per inch. If optional horizontal spacing (see 3.5.3) has been employed, this switch is
non-functional until after a Clear operation is performed.
When this switch is on, each carriage return also causes a line feed (paper moves up one
line). When off, the carriage return merely moves the carriage back to the left margin,
but the print head stays at the same line: a separate Line Feed operation is required to
move the paper.
This is a three-position toggle switch that selects the method of parity checking to be
used
on each incoming character, and the method of parity-bit generation to be used
on transmitted characters. Parity is not checked in MAR K position.
This two-position switch selects half- or full-duplex data communications. In
half-duplex, keyboard data is both transmitted and automatically printed on the
printer. In full-duplex, keyboard data is transmitted only: it will be printed only if
"echoed" back by the host computer. In full-duplex, the only data printed is that
received over the communications link.
NOTE
When the optional current-loop interface is used, this
switch
must always be in the FULL position,
regardless
of the mode of operation.
This pushbutton provides a general reset of the HyTerm electronics. This function is
also accompl ished at power-on.
2-3

2-4