Digital Equipment LA 120 User manual

USER GUIDE

EK-LA120-UG-003 '

1 st Edition, September 1978
2nd Edition, January 1979
3rd Edition, June 1979
Copyright © 1978, 1979 by
Digital
Equipment Corporation
The material in
this manual is for informational
purposes and is subject to change without
notice.
Digital Equipment Corporation assumes no
responsibility for any errors which may appear
in
this manual.
Printed in U.S.A.
This document was set on DIGITAL's DECset-
8000 computerized typesetting system.
The following are trademarks of Digital Equip-
ment Corporation, Maynard, Massachusetts:
DIGITAL
DEC
PDP
UNIBUS
DECSYSTEM-20
DIBOL
VAX
VMS
DECsystem-10 MASSBUS
OMNIBUS
OS/8
RSTS
RSX
lAS

CONTENTS
INTROD UCTION
CHAPTER 1
OPERATOR INFORMATION·
PART 1 GENERAL USER INFORMATION ...................................................1
Operator's Console.........................................................................................1
Lights................................................................................................................
3
Numeric Display..............................................................................................3
Local Control Keys..........................................................................................3
SET-UP Keys...................................................................................................4
Control Character Keys..................................................................................5
Control Keys....................................................................................................6
Other Keys.......................................................................................................6
Optional Numeric Keypad .............................................................................7
Power On/Off Switch .....................................................................................7
Cover Interlock Switch ...................................................................................7
Paper Adjust Knob..........................................................................................8
Carriage Adjustment Lever ...........................................................................8
Tractor Adjust Knobs .....................................................................................8
Alarm Indicators .............................................................................................9
Testing and Troubleshooting the LA 120 ................................................. 10
Operator's Troubleshooting Table............................................................. 11
Sample LA 120 Operators' Card ................................................................13
PART 2 DESCRIPTION OF LA 120 FEATURES ........................................ 15
FORM SET-UP FEATURES................................................................................. 15
Recommended Sequence for Setting Up a New Form.......................... 15
SET-UP Mode ...............................................................................................18
Selecting Lines Per Inch..............................................................................19
iii

Setting Form Length.................................................................................... 20
Top of Form (TO F) ........................................................................................ 21
Top and Bottom Margins and Vertical Tabs ............................................ 22
Displaying Line Number of a Vertical Tab or Margin ............................. 22
Setting Top Vertical Margin ....................................................................... 23
Setting Bottom Vertical Margin ................................................................. 23
Clearing Vertical Margins ............................................................................ 24
Setting Single or Multiple Vertical Tabs................................................... 24
Clearing a Single Vertical Tab .................................................................... 25
Clearing all Vertical Tabs............................................................................. 25
Characters Per Inch (Horizontal Pitch)...................................................... 25
Horizontal Margins and Tabs ..................................................................... 27
Displaying Column Number of a Horizontal Tab or Margin .................. 27
Setting Left and Right Margins .................................................................. 28
Clearing Left and Right Margins ................................................................ 28
Setting Horizontal Tabs............................................................................... 29
Clearing a Single Horizontal Tab ............................................................... 29
Clearing all Horizontal Tabs........................................................................ 29
OPERATOR COMFORT FEATURES.................................................................. 30
Auto Repeat.................................................................................................. 30
Last Character View ..................................................................................... 31
Bell Volume ................................................................................................... 31
Key Click........................................................................................................ 32
COMMUNICATION FEATURES......................................................................... 32
Line/Local...................................................................................................... 33
Baud Rate (Speed)....................................................................................... 34
Answerback .................................................................................................. 36
Transmitting or Printing the Answerback Message ............................... 36
Entering/Deleting Answerback Message................................................. 37
Auto Answerback ......................................................................................... 37
Buffer Control ............................................................................................... 38
Keyboard and Printer Character Set ......................................................... 39
Printer Character Set ................................................................................... 39
Auto Disconnect........................................................................................... 40
Local Echo ..................................................................................................... 41
Auto New Line at Right Margin ................................................................. 41
Auto Line Feed ............................................................................................. 42
Modem ........................................................................................................... 42
Half Duplex (HDX) Initial Calling State.................................................... .43
Secondary Channel...................................................................................... 43
Parity and Data Bits ..................................................................................... 44
Printer New Line Character....................................................................... .45
XON/XO FF .................................................................................................... 45
Alternate Keypad Mode .............................................................................. 46
Alternate Character Set .............................................................................. 47
Selecting Alternate Character Set............................................................. 47
Manually Selecting APL.............................................................................. 47
Manually Deselecting APL ......................................................................... 48
Break Action ................................................................................................. 48
iv

STORE, RECALL, AND STATUS FEATURES .................................................. 49
Factory Stored Settings .............................................................................. 50
Store/Reca II .................................................................................................. 51
Status ............................................................................................................. 52
Self-Test Feature..........................................................................................53
PART 3 RIBBONS, FORMS, AND IMPRESSIONS ................................. 54
Installing Ribbon .......................................................................................... 54
Print Impression Adjustment ..................................................................... 54
Loading Paper/Forms.................................................................................. 55
Reloading Paper/Forms.............................................................................. 56
CHAPTER 2
INSTALLATION, INTERFACE, AND
SPECIFICATIONS
INSTALLATION AND CONFIGURATION......................................................... 59
Unpacking and Inspection.......................................................................... 60
Packing Procedures ..................................................................................... 61
Voltage Selector Switch .......................................................................... 61
Checkout Procedure .................................................................................... 62
Answerback Jumper .................................................................................... 62
INTERFACE INFORMATION .............................................................................. 63
EIA Interface................................................................................................. 63
EIA Cables ..................................................................................................... 63
1M PEDANCE OF TERMINATOR ........................................................................ 65
Rise and Fall Times ...................................................................................... 65
Open Circuit Voltages.................................................................................. 65
LA 120 SPECIFICATIONS ................................................................................... 66
CHAPTER 3 PROGRAMMER INFORMATION
GENERAL............................................................................................................... 71
ESCAPE SEQUENCE............................................................................................ 72
Printer Character Sets............................................... '" ............................... 73
Optional Cha racter Sets.............................................................................. 74
Active Column and Active Line.................................................................. 74
Linefeed Newline Mode .............................. '" ............................................. 75
Horizontal Pitch ............................................................................................ 75
Horizontal Margins ....................................................................................... 76
HorizontaI Tabs............................................................................................. 76
Vertical Pitch................................................................................................. 77
Form Length........................................................................ '" ....................... 78
Vertical Margins ........................................................................................... 78
Vertical Tabs ................................................................................................. 78
PRODUCT IDENTIFiCATION.............................................................................. 79
Alternate Keypad Mode .............................................................................. 79
Control Characters...................... '" .............................................................. 80
APL Character Set....................................................................................... 83
Sample Form SET-UP Using Escape Sequences.................................... 84
Synchronization............................................................................................ 84
v

FILL TIME FORMULAS ....................................................................................... 85
Horizontal Movement .................................................................................. 85
Vertical Movement ....................................................................................... 86
Keyboard Operation..................................................................................... 86
Auto Repeat.................................................................................................. 86
Printable Character Keys ............................................................................ 86
Control Character Keys ............................................................................... 87
Optional Auxiliary Keypad .......................................................................... 89
CHAPTER 4 COMMUNICATIONS
FU LL DUPLEX (FOX)............................................................................................ 93
Full Duplex Connection Requirements..................................................... 93
Full Duplex Break......................................................................................... 93
Full Duplex Disconnect Conditions........................................................... 93
Restraint Mode vs Speed Control Mode .................................................. 94
HALF DUPLEX (HDX) .......................................................................................... 94
Initial Direction Determination .................................................................. 94
Reverse Channel........................................................................................... 95
Modem Delay ............................................................................................... 95
Request to Send Delay................................................................................ 95
Turnaround Characters................................................................................ 95
Half Duplex Break........................................................................................ 95
Loss of Data Set Ready............................................................................... 96
Half Duplex Disconnect.............................................................................. 96
MODEM SET-UP FEATURE DESCRIPTION.................................................... 96
GeneraL.......................................................................................................... 96
Half Duplex.................................................................................................... 97
EFFECTS OF PAPER OUT ................................................................................... 98
CHAPTER 5
OPTIONS
20 mA LA 12X-AL ...............................................................................................101
Installation..................................................................................................10 1
Test
After Installation................................................................................ 103
LA 12X-DL EXPANDED BUFFER .................................................................... 103
CHAPTER 6
SUPPLIES AND ACCESSORIES
GENERAL............................................................................................................ 107
WARRANTY ...........................................................................................Back Cover
vi

~NT~ODUCT~ON
Your LA 120 DECwriter is designed to work very much like a typewriter.
If you can type, this guide will help you learn how to use your LA 120.
The LA 120 is also easy to integrate with most systems. It is compatible
with both EIA and ANSI standards.
Besides
the many standard features built into your basic LA 120
DECwriter III, there are a number of options and accessories that may be
added
to your terminal to make it useful in an even wider range of
applications.
vii

Operator ~n~ormation