959227 9701_Rev_C_Silent_700__733_ASR_KSR_Operation_Instructions_Dec_1975 9701 Rev C Silent 700 733 ASR KSR Operation Instructions Dec 1975

User Manual: 959227-9701_Rev_C_Silent_700__733_ASR_KSR_Operation_Instructions_Dec_1975

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Texas Instruments Incorporated
All Rights Reserved
PRINTED IN U.:'.A.

The information and/or drawings set forth in this document and all rights in
and to inventions disclosed herein and patents which might be granted thereon
disclosing or employing the materials, methods, techniques or apparatus
described herein are the exclusive property of Texas Instruments Incorporated.
No disclosure of the information or drawings shall be made to any other person
or organization without the prior consent of Texas Instruments Incorporated.

ENGINEERING CHANGE NOTICE
DESCRIPTION

DATE

ECN

LEVEL

11-1-73

383371

Add Options to Appendix B

2-1-74

386154

Various changes and updates

7-1-74

396763

Corrections and Updates

10-1-74

399143

Corrections and Updates

USER'S CRITIQUE
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improvements to this manual you feel are needed. After using this manual, please take the first opportunity to complete
this questionnaire and return it, postpaid, to the factory where your comments will be given every consideration. Thank
you.

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ManUill Title 733ASR/KSR OPERATING INSTRUCTIONS

Manual No. 959227-9701

NO POSTAGE NECESSARY IF MAILED IN U.S.A.

Fold on the two lines on reverse side, staple or tape, and mail

12-1-75

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FIRST CLASS
Permit No. 6189H.ouston, Texas

BUSINESS REPLY MAIL
No postage necessary if mailed in the United States

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TEXAS INSTRUMENTS INCORPORATED
DIGITAL SYSTEMS DIVISION

P.O. BOX 1444

ATTENTION: TECHNICAL PUBLICATIONS

MIS 670
FOLD

HOUSTON, 'fEXAS 17C01

ATTENTION
Before attempting to operate your new Silent 700 Data Terminal, carefully review the following sections of this manual
Page

Section

6-4
2-1
2-2
2-3
2-6
2-7
AppendixB

6-4
2-1
2-1
2-1
2-2
2-3
B-1

Installing the ASR Upper Unit (ASR only)
Visual Check
Power Connections
Paper Loading
Tape Cassette Installation (ASR only)
Communication Interface Connections
Optional Equipment (as applicable)

TABLE OF CONTENTS
Page

Section
Definitions
GENERAL DESCRIPTION
1-1 Introduction
1-2 Description
II

III

INSTALLATION
2-1 Visual Check
2-2 Power Connections
2-3 Paper Loading . . .
2-4 Printer and Keyboard
2-5 Contrast Setting . . .
2-6 Tape Cassette Installation
(ASR Only) . . . . . . .
2-7 Communication Interface
Connections ..
2-7.1 EIA (RS232C)
2-7.2 Current Loop
2-7.3 Phone Line Connections

4-3 Controls and Indicators
4-3.1 Upper Switch Panel
4-3.1.1 Top Row, Tape Cassette
Control . . . . . . . .
4-3.1.2 Middle Row, PLAYBACK
and RECORD Controls
4-3.1.3 Bottom Row, Device Controls
4-3.2 On-Line/Off Switch ..
4-3.3 Keyboard Controls
4-4 Cassette Tape Preparation
(Tape Load) and Removal
4-4.1 Tape Write Tabs . . . .
4-4.2 Tape Cassette Insertion
4-4.3 Tape Cassette Removal
4-4.4 Cassette "Load" and
Transport Ready
4-5 Tape Recording Operations
4-5.1 Block Recording Technique
4-5.2 Recording Limitations
4-5.3 Character Display
4-5.4 Recording the Buffer Data
4-5.5 Inspecting Contents of
Record Buffer . . . . . .
4-5.6 Erasing Entire Record Buffer
4-5.7 Terminal Setup
4-5.8 Editing While Recording
4-6 Playback Operations
4-6.1 Terminal Setup
4-6.2 Continuous Playback
4-6.3 Block Forward/Reverse
4-6.4 Character Forward

1-1
1-1

2-1
2-1
2-1
2-2
2-2
2-2
2-3
2-3
2-3
2-3

OPERATING PROCEDURES FOR KSR
3-1 General
3-2 Controls and Indicators
3-3 Keyboard . . . . . . .
3-4 Printer Control Characters
3-5 Full and Half Duplex Operation

3-1
3-1
3-1
3-1
3-1

GENERAL INSTRUCTIONS
FOR ASR OPERATION
4-1 General
4-2 Definitions

4-1
4-1

Page

Section

iii

4-2
4-2
4-3
4-4
4-6
4-7
4-7
4-8
4-8
4-8
4-8
4-8

4-9
4-9
. 4-9
4-9
4-10
4-10
4-10
4-10
4-11
4-12
4-12
4-12
4-12
4-12

TABLE OF CONTENTS (Continued) ,
Section

Page
4-6.5 Locating a Block on Tape
4-7 Erasing a Tape Cassette
4-8 Playback Error Procedure
(Option) . . . . . . . . .
4-8.1 Replay the Block
4-8.2 Read (Transmit) the Block with
an Error . . . . . . . . . . .
4-8.3 Skip the Block with an Error
4-8.4 Read up to Character Error
4-8.5 Correct an Entire Line
4-9 Duplicating a Tape
4-9.1 Duplication Process . . .
4-9.2 Editing While Duplicating
a Tape . . . . . . . . . .
4-9.2.1 Changing a Block on Duplicate
Tape . . . . . . . . . . .
4-9.2.2 Change a Character During
Duplication . . . . . .
4-10 Control Interlocks . . . . .
4-10.1 Record Mode Interlocks .
4-10.2 Playback Mode Interlocks
4-10.3 Operating Mode Interlocks
4-10.4 Transport Control Interlock

Section

4-12
4-13

5-2.6 Print Out From Line
(No Recording)
5-17
5-2.7 Play Back Tape to Line
(No Printout) . . . . .
5-18
5-2.8 Play Back Tape To Line and
Print Out . " . . . . .
5-19
5-2.9 Play Back Tape To Line,
Print Out From Line
5-20
5-2.10 Simultaneously Send and Receive
From Tapes to Line • • . . . • . 5-21
5-3 Simultaneous Line/Local • . . . . . 5-22
5-3.1 Keyboard to Line, Print Out From Line,
and Duplicate Tape . . . • . . . 5-22
5-3.2 Play Back Tape to Line and
Record on Tape From Keyboard
5-23

4-14
4-14
·
·
·
·
·

Page

4-14
4-14
4-14
4-14
4-15
4-15
4-15
4-15
VI

·
·
·
·

STEP-BY-STEP ASR OPERATING
INSTRUCTIONS
5-1 Local Operations . . . . . . .
5-1.1 Record on Tape From Keyboard
5-1.2 Editing Blocks of Data on Tape
5-1.3 Play Back and Print Out Tape
5-1.4 Duplicate Tape and Print Out
Original Tape . . . . . . . . .
5-1.5 Duplicate Tape at High Speed
5-1.6 Erase Tape
.........
5-1.7 Duplicate Tape and Edit Copy Tape
5-2 On-Line Operations . . . . . . .
5-2.1 Keyboard to Line (No Printout)
5-2.2 Keyboard to Line and Print Out
5-2.3 Keyboard to Line, Print Out,
and Record on Tape . . . .
5-2.4 Record on Tape From Line
(No Printout) . . . . . . .
5-2.5 Record on Tape From Line
and Print Out . . . . . . . .

4-15
4-16
4-16
4-16
4-16
4-16

5-2
5-2
5-4
5-6
5-7
5-8
5-9
5-10
5-12
5-12
5-13

CARE AND CLEANING
6-1 General . . . • . . .
6-2 deaning • . . . • . .
6-2.1 Paper Drive Roller deaning
6-2.2 Printhead Drive Mechanism
Cleaning . . . . . . . . . .
6-2.3 Cassette Transport Cleaning
6-2.4 Printhead deaning
6-3 Access to PC Cards
6-3.1 ASR Upper Unit Access
6-3.2 KSR Lower Unit PC Card Access
6-4 Installing and Removing the
ASR Upper Unit
•....
6-4.1 Installing the Upper Unit
6-4.2 Removing the Upper Unit
6-5 Terminal Malfunction Checklist

6-1
6-1
6-1
6-1
6-1
6-1
6-3
6-3
6-3
6-4
6-4
6-4
6-5

APPENDIX A
MODEL 733 EQUIPMENT SPECIFICATIONS
APPENDIXB
MODEL 733 OPTIONS,

5-14
APPENDIXC
OPERATOR'S QUICK-'REFERENCE CARD

5-15
5-16

LIST OF ILLUSTRATIONS

Figure No.
1-1
2-1
2-2
2-3
2-4
2-5
2-6
2-7
2-8

3-1
3-2
3-3

KSR/ ASR Data Terminals
115V and 230V Connections
.. .
atTB1
Paper Loading (Side View)
Tape Cassette Installation
ASR/KSR Data Terminal
External Connections
TTY-Neutral Interface Wiring
Diagram . .
TTY-Neutral Interface Wiring
Diagram, Used for Receive Only
TTY -Polar In terface
..
Wiring Diagram
TTY -Polar Interface Wiring
Diagram, Used for Receive Only

Page

Figure No.

1-2

3-4
3-5

2-1
2-2
2-3

3-6

2-4

...

Internal Controls
Keyboard Layout and Symbolization,
Standard ASCII
Unshifted Characters,
.
Standard ASCII

. ..

4-1
4-2

2-6
4-3

2-6

4-4
2-7
4-5

2-7

6-1

3-2
3-4

6-2

Page
Shifted Characters,
..
Standard ASCII
Control Characters,
Limited ASCII
Shift and Control Characters,
Limited ASCII

3-5

3-6

. . ..
Tape Data Format
ASR Module Assembly (Upper Unit)
.
Switch Panel
Terminal On-Line/Off Switch
and Power Switch
USASCII Keyboard
Special Functions Keys
Tape Cassette Write Tabs

Model 733 Data Terminal,
Internal Assemblies
(Card Rack Cover Removed)
Tape Transport Cleaning Areas

3-6
4-1
4-2
4-7
4-7
4-8

6-2
6-3

3-5

LIST OF TABLES

Table No.
2-1
2-2
2-3

3-1

Page

Table No.

Page
EIA Interface Cable
2-5
Pin Functions
Current Loop (TTY)
Interface Cable Pin Functions . . . . . . 2-5
Phone Line (Modem)
Cable Pin Functions . . . . . . . . . . . 2-5

3-2

ASCII Code System and
Character Set
. . . . . . . . . 3-4

4-1

Tape Control Switches
.....
(Switch Panel Top Row)
Playback/Record Control Switches
(Switch Panel Middle Row)
Device Function Switches
(Switch Panel Bottom Row)

4-2

KSR and ASR Terminal
Controls and Indicators . . . . . . . . . 3-3

4-3

4-3
4-4
4-6

DEFINITIONS

The following words are defined to aid the reader who may
be unfamiliar with ASRtKSR Data Terminal operation and
data communication terminology. The list is certainly not a
complete glossary, but simply an elementary guide to words
common to this publication.

local

operations within the data terminal itself, as
opposed to on-line operations.

mark - a specific state of a binary bit on communication
lines; equivalent to a logic ONE.

address - a specific location in a storage device.
null - a specific character of the USASCII (00000000),
code normally used as a time fiU or media fill
character.

baud - a unit of signalling speed equal to the number of
signal events per second.
bit (binary digit) - the smallest unit of information in a
binary system of notation.
block - a grouping of data (characters) to facilitate a
particular operation; in the ASR a block consists of
up to 86 characters stored in the buffer or on tape.
buffer - an .intermediate storage device between magnetic
tape and the electronics of the ASR Terminal; it
groups data prior to recording on tape and provides
speed conversions between the tape read/write and
terminal electronics.

playback (play back) - the act of transmitting data from
magnetic tape through a buffer to the printer, line,
recorder, or other device.
printer - mechanism which prints readable characters
across a page; in the KSR, it includes the printhead,
printhead carriage, paper-handling devices, and
control electronics.
read - to sense information contained in some source such
as tape or buffer.
read error - a playback malfunction caused by a missing
flux reversal (bit dropout) which is in turn caused by
dirty tape, defective tape, dirty head, equipment
malfunction, etc.
read-only tape - a permanent tape recording used only for
playback.
record - to put data into a storage device (tape, buffer,
etc.)

cassette, tape - a container facilitating operation, storage,
and protection of magnetic recording tape.
character - symbols corresponding to alphabet letters,
numerals, punctuation marks, spaces, and nonprinting
control codes (e.g., line feed, carriage return).
code - a system of symbols representing data or
instructions to ASR/KSR devices.
controller; record, playback - the electronics (logic)
responsible for carrying out automatically and
manually-initiated operating commands related to
record and playback functions.

serial - occurring sequentially with time; one after the
other .
space - a code or character (nonprinting) to indicate an
output space in which nothing is printed. Also with
respect to communication lines a "space" is a specific
state of a binary bit; it is equivalent to a logic ZERO.

. data - general term for any type of information.
duplex - describes two operations, such as sending and
receiving, occurring on the same line or equipment;
full duplex means simultaneous send and receive; half
duplex means send or receive but not simultaneous.
line, on-line - describes cables, wires, telephone lines, etc.
over which data is transmitted to and from the
ASR/KSR; when connected to these lines, the
terminal (or certain devices) is "on-line:"
load - describes the operation of positioning a tape cassette
at the "beginning of tape" marker for recording or
playback operation.

transport, tape - a device which moves magnetic recording
tape from one reel to another for playback,
recording. erasure, rewinding, etc.
write - to record data in a storage device (tape, buffer,
etc.)

SECTION I
GENERAL DESCRIPTION

1-1 INTRODUCTION.

This manual describes operation of the Silent 700
Electronic Data Terminal, Model 733, manufactured by the
Digital Systems Division of Texas Instruments
Incorporated. The manual contains information for
installation, checkout, and operation of the basic unit.
Optional equipment, terminal specifications, and a
quick-reference terminal operation chart are presented in
appendixes to this manual.

The Model 733 can be interfaced with Bell System data sets
or other equipment having an EIA RS232C interface, or
with acoustic couplers, Bell Data Access Arrangements, or
Teletype current loops in an asynchronous serial by bit and
character nature.

1-2 DESCRIPTION.
The Model 733 is designed to serve a wide variety of
telecommunication applications requiring the USAscn
code. The Model 733 KSR is a keyboard send-receive unit
with selectable transmission speeds of 110, 150, and 300
baud (10, 15, or 30 characters per second). The Model 733
ASR is an automatic send-receive terminal utilizing the
keyboard and printer of the KSR and two cassette magnetic
tape units for automatic sending and receiving. Figure 1-1
shows photos of the ASR and KSR models.

The basic features of the Model 733 ASR and KSR and
their optional equipment (described in Appendix B) make
them ideally suited for timesharing, point-to-point
telecommunication, remote access, remote data entry,
computer console, and similar applications.
A unique serial data bus provides switch-selectable
simultaneous operation in local or on-line modes and the
capability to accept optional features without changing the
basic unit.

The 733 is designed in several modular units: the keyboard,
printer mechanism, and transmit/receive electronics of the
KSR lower unit; and record and playback units and
associated controls of the ASR upper unit.
a.

The 733 PRINTER unit features a solid-state
printhead with a 5 by 7 dot matrix of heating
e Ie ments, paper-handling mechanism, and
printhead movement devices.

The transmit/receive electronics within the
KSR control telecommunications with remote
terminals or computers or local (no
transmit/receive) operation.

A self-contained power supply provides all power necessary
to operate the terminal. The supply can be wired for either
115V or 230V operation, 50 to 60 hertz.

The standard 733 ASCII KEYBOARD permits
manual typing operations and transmission of
printable characters and operational codes in
seven-level USASCII code. Full uppercase and
lowercase capability is available as an option.

The PLAYBACK section in the ASR upper unit
controls playback of messages recorded on the
magnetic tape cassettes for local use (printed
out by the 733 printer unit) and/or
transmission to remote terminals or other
devices.

The Model 733 ASR includes a magnetic tape cassette
system consisting of two cassette transports, a record
controller, and a playback controller. Either of the two
transports may be used wlth the record controller or the
playback controller but must operate alone or in opposite
modes; i.e., one in the record mode and the other in the
playback mode.
The tape recording format is serial by bit and serial by
character, 86 characters to a block. The recording system
permits the operator to easily edit or correct any line of
data being recorded. It also allows correction of previously
recorded lines, and blocks may be added to, or deleted
from, a tape using a tape duplicating process. In contin:lOUS
tape. format, maximum storage capacity of a cassette, using
both sides, is 310,000 characters.

The RECORD section in the ASR upper unit
controls recording of local (from the keyboard)
or remore (from the telecormnunication lines)
messages on magnetic tape cassettes.

1-1

this is particularly helpful when trying to recover data in
which a read error is detected. If the playback operation
stops because of a read error, the erroneous block just read
can be either skipped, transmitted, or reread.

Data read from the tape is stored (one block at a time) in a
buffer (memory) before being transmitted to a line or local
device. The playback system allows data to be read from
tape either continuously, a block at a time, or a character at
a time. A block also can be reread any number of times;

MODEL 733 ASR DATA TERMINAL

MODEL 733 KSR DATA TERMINAL
FIGURE 1-1. KSR/ASR DATA TERMINALS

1-2

SECTION II
INSTALLATION

binding. Lift the window and pinch roller (Figure 3-1) and
manually move the printhead across its carriage to check
that the printhead moves freely without interference.

2-1 VISUAL CHECK.
Visually check the data terminal before connecting the ac
power cord. Check for any obvious shipping damage such as
broken cassette windows, cracked or bent terminal cover,
or packing material inside the case. Check to see that the
terminal cover opens and closes freely. Remove the PC card
rack covers of the ASR and KSR units as instructed in
paragraph 6-3 and Figure 6-1, and visually check for foreign
objects which could possibly short any of the circuits. Press
down on the PC card ejectors of all cards to be sure they
are plugged into their sockets tightly.

2-2 POWER CONNECTIONS.
The normal power connection is 115 Vac, 50/60 Hz. Before
plugging the power cord into a 230 volt outlet, be sure the
terminal is wired for 230 volts .. Figure 2-1 shows the
connections at terminal block TBl for 115 and 230V
operation. TBI is located under the power assembly and PC
card rack cover shown in Figure 6-1. For 230V operation
replace fuse Fl at the terminal power cord exit (see Figure
2-4) with a Slo-Blo 1.5A, 250V fuse. Replace the power
cord plug to match your 230V wall receptacle.

Before connecting the power cord, load paper in the
terminal (see paragraph 2-3).

2-3 PAPER LOADING.
The terminal must be loaded with paper before applying
power. Load the paper as follows (Figure 2-2):
The printer should never be operated
without paper on the platen (drive roller);
damage to both platen and printhead
could result.
Check that none of the connectors are loose. Also check
that all keys on the keyboard operate smoothly without

Open the terminal cover and lift the pinch
roller. Do not turn the platen unless the pinch
roller is lifted.

Place a fresh roll of TI Silent 700@ printing
paper on the supply roll holders as shown in

(b) 230V OPERATION

(a) 115V OPERATION
NOTE:

TB1 is located under the Power Assembly Cover (shown in Figure

6-11.

Fuse F1 at rear

of terminal must be a 3A, 120V Sio-Blo or a 1.5A, 250V Sio-Blo, as appropriate.

FIGURE 2-1. 115V AND 230V CONNECTIONS AT POWER SUPPLY TERMINAL BLOCK TBl

2-1

PAPER GUIDE

/ ~) .....

I'"I

I
.../

'\
PINCH
ROLLER

DRIVE
ROLLER
(PLATEN)

HEAD LIFT
ARM

PRINTHEAD
CARRIAGE SHAFT

FIGURE 2-2. PAPER LOADING (SIDE VIEW)

2-5 CONTRAST SETTING.

Figure 2-2, checking that the roll can turn
freely.
c.

To increase image contrast, rotate the contrast adjustment
under the terminal cover (Figure 3-1) clockwise; to
decrease, turn counterclockwise.

Feed paper down the paper chute, then
between the paper chute and drive roller as
shown in Figure 2-2. Be sure the paper is
centered in the paper chute.

2-6 TAPE CASSETTE INSTALLATION (ASR
ONLY).
Load cassettes as follows:

Lower the pinch roller, checking that the paper
is between the pinch roller and the platen.

Switch on power and depress the PAPER ADV
key. Be sure paper is feeding smooth and
straight. Tear off excess paper by pulling
forward over the tear-off edge.

Close the terminal cover, and check that the
paper feeds through the slot in the cover and on
to the rear of the terminal.

NOTE
Use only digital-grade magnetic tape
cassettes which meet TI Specification No.
960333 or applicable ANSI, BEMA, and
ECMA standards.

Open the cassette transport door.

Insert the tape cassette with the tape side up as
shown in Figure 2-3.

Press the tape cassette down and in, being sure
that the capstan and reel rotors fit into the
proper holes.

Close the cassette transport door.

2-4 PRINTER AND KEYBOARD.
To check operation place the printer and keyboard in the
LOCAL mode as follows: On the KSR, set the
ON-LINE/OFF switch to OFF. On the ASR also set the
lower row of switches on the upper switch panel (Figure
4-2) to LOCAL. Check printer and keyboard operation by
typing~n the keyboard and checking that the correct
characters-are printed and that all keys operate.

2-2

2-7 COMMUNICATION INTERFACE
CONNECTIONS.

communication line. This cable consists of an edge
connector for connection to the terminal with a 6-foot
cable terminated with four spade lugs. For specific
connections see Figures 2-5, 2-6, 2-7, and 2-8 and Table
2-2.

Connect interface cables at the rear of the terminal (lower
right of Figure 2-4).
2-7.1 EIA (RS232C). A data set cable (TI Part No.
959372-0001) is used to connect the 733 ASR/KSR to an
external data set. A standard RS232C-compatible 25-pin
connector is provided at the end of the 6-foot cable. For
pin assignments see Table 2-1.

2-7.3 PHONE LINE CONNECTIONS. This connector (TI
Part No. 959383-0001) is used to connect the 733
ASR/KSR with built-in modem option to a phone line. The
6-foot cable is terminated with two spade lugs for
connection to the Bell System type-CDT Data Access
Arrangement. For pin assignments see Table 2-3.

2-7.2 CURRENT LOOP. A Teletype cable (TI Part No.
959384-0001) is used to connect the ASR/KSR to the

CASSETTE
TRANSPORT
DOOR

PUSH
CASSETTE TRANSPORT
DOOR FORWARD TO
CLOSE.

CASSETTE RETAINERS
REEL ROTOR

(BI

(AI

FIGURE 2-3. TAPE CASSETTE INSTALLATION

TABLE 2-1. EIA INTERFACE CABLE PIN FUNCTIONS 4
(CABLE 959372-0001)

Connector Pin Numbers
Terminal

Data Set

6
7
8
9
10
A
F
H
K

20
7
5
6
3
1
4
2
8

Pin Function

Data Terminal Ready 1
Signal Ground
Clear to Send 2
Data Set Ready 3
Received Data
Protective Ground
Request to Send 1
Transmitted Data
Data Carrier Detect

NOTES:
1 Held to an ON condition by data terminal.
2Held to an ON condition by data set during transmission.
3Held to an ON condition when data set is operative.
4 All are used only with external modem.

2-3

ASR-KSR CONNECTOR (Pl)

ASR FAN

ASR COVER
FASTENER

AC FAN
CONNECT

KSR-ASR
CONNECTOR (P3)
AUXILIARY INTERFACE
CONNECTOR (J2)

FIGURE 2-4. ASR/KSR DATA TERMINAL EXTERNAL CONNECTIONS
(REAR VIEW)
TABLE 2-2. CURRENT LOOP (TTY) INTERFACE CABLE PIN FUNCTIONS
(CABLE 959384-0001)

Terminal Pin No.

Wire Color
at Spade Lug

4
D
5
E

White
Green
Black
Red

Pin Function
Teletype
Teletype
Teletype
Teletype

positive receiver input loop
receiver input loop
transmitter output loop
transmitter output loop

TABLE 2-3. PHONE LINE (MODEM) CABLE PIN FUNCTIONS*
(CABLE 959383-0001)

Terminal Pin No.

Wire Color
at Spade Lug

Pin Function

C
3

Red
Black

Communication lillt'
Communicatiull lint'

*Used only with built-in internal modem option.

2-4

r••

SPADE LUGS
J1.4
WHITE

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I

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RECEIVE
LOOP

GREEN

J1·D

CURRENT
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I
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l~._______

J 1-5

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J1 -D

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01---------«

r - - - - - 'I

TTY
SEND
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959384
NOTE: SEE PARAGRAPH 2-7.2.

FIGURE 2-7. TTY-POLAR INTERFACE WIRING DIAGRAM

SPADE LUGS

•

TELETYPE {
TO
RECEIVE
LOOP

•

NOTUSEO{

«
«

I
I

TTY INTERFACEPcCA;D 'I

~------------:---t

J1-D

GREEN

CURRENT
SENSOR

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•

BLACK

•

RED

J1-4

WHITE

J1-5

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----------- ___ 1

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)

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CABLE ASSY
959384

NOTE: SEE PARAGRAPH 2-7.2.

FIGURE 2-8. TTY-POLAR INTERFACE WIRING DIAGRAM, USED FOR RECEIVE ONLY

2-6

SECTION III
OPERATING PROCEDURES FOR KSR

3-1 GENERAL.
All operations described in this section apply to both the
733 KSR and ASR data terminals. Additional information
needed to operate the ASR terminal is contained in
Sections IV and V.

TAPE

Performs a local printer forward space; also
used by the record controller in the ASR
unit (no code is transmitted).

BREAK

This key sends a continuous space as long as
it is held depressed; used to interrupt a
transmission to a remote on-line terminal.

3-2 CONTROLS AND INDICATORS.
Controls and indicators are shown in Figure 3-1 and
explained in Table 3-1. The keyboard is explained in
paragraph 3-3 below.

3-4 PRINTER CONTROL CHARACTERS.
The following occur when the printer receives these printer
control characters (Figure 3-2) from the line or the
keyboard.

3-3 KEYBOARD.
Standard USASCII keyboard codes (uppercase only) are
shown in Table 3-2. Bits 1 through 7 are represented by b 1
through b 7 • Figure 3-2 shows keyboard arrangement;
Figures 3-3 through 3-5 show characters and control codes
generated using the SHIFT and CTRL keys.
The following special function keys are also on the
keyboard:
REPEAT

SHIFT

Used to repeat a character. Hold the
REPEAT key down while the character to
be repeated is momentarily depressed once.
By depressing other characters in succession,
these characters will be repeated in
succession (REPEAT key held down).

HERE IS

With the terminal set to ON-LINE, this key
triggers the automatic Answer-Back Memory
option. An answer-back message of up to 21
characters will be transmitted.

TAPE

LF (line feed) - the printer advances one paper
line without moving the printhead.

CR (carriage return) - the printhead returns to
the left margin. The paper is not advanced one
line.

BS (backspace) - the printhead is stepped one
space to the left if not in column one.

3-5 FULL AND HALF DUPLEX OPERATION.

PAPERADV Advances paper, returns the carriage to the
left margin, and continuously feeds paper as
long as depressed. No code is transmitted.
LINE FEED and RETURN must both be
used to obtain a conventional typewriter
carriage return code to tape or line.
Depressed to generate control character
codes shown in Figures 3-5 and 3-6.

BEL (bell) - the audible alarm is actuated.

Both LINE FEED and RETURN must be used to obtain a
conventional typewriter carriage return co~e. Control
characters are generated from the keyboard by pressing and
holding the CTRL key, then the control character .

Depressed to type shifted characters shown
in Figures 3-4 (lowercase is an option) and
.'i-6.

CfRL

In the half duplex mode with the terminal switch to ON
LINE, only one operation, either transmit or receive, may
occur during a given time. The terminal automatically locks
out the transmitter as long as the receiver is receiving data
continuously, or it automatically locks out the rece:i

n
0

IPRINTABLE CHARACTER
_

PRINTER CONTROL CHARACTER (See paragraph 3-4)

W/.#/dB

AUXILIARY DEVICE CONTROL CHARACTER (See paragraphs B-2 and 8-4)
CODES GENERATED BY KEYBOARD, BUT NO ACTION TAKEN

US ASCII CONTROL CHARACTERS
(From USA Standards Institute Publication X3.4-l968)
ACK
BEL
BS
CAN
CR
DCl = X-ON
DC2 = TAPE
DC3 = X-OFF
DC4 ='fAPE*DEL = RUB OUT
DLE
EM
ENQ=WRU
EOT
ESC
ETB

acknowledge
bell
backspace
cancel
carriage return
device control 1
device control 2
device control 3
device control 4 (stop)
delete
data link escape
end of medium
enquiry
end of transmission
escape
end of transmission block

*not strictly a control character
3-4

ETX
FF
FS
GS
HT
LF
NAK
NUL
RS
SI
SO
SOH
STX
SUB
SYN
US
VT

end of text
form feed
fIle separator
group separator
horizontal tabulation
line feed
negative acknowledge
null
record separator
shift in
shift out
start of heading
start of text
substitute
synchronous idle
unit separator
vertical tabulation

DDD[JGJGJDGJGJGJDD~

EJGJQ[]GJGJQGJGJGJGJGJGJ
El[J[]G]CJGJGJO[]ODGJE:1
c::J[JOO[][]QGJDDDE1
I

NOTES:

(SPACE BAR)

The above codes are generated when the labeled key is depressed but neither the
SHIFT nor the CTRL key is depressed.
*Indicates that it is not a code generating key.

FIGURE 3-3. UNSHIFTED CHARACTERS, STANDARD ASCII

CJD[:J~c:Jc:JDCJCJDDDG:l
aDDDDDDDDc:Jc:J~c:J

ElDDDDDDDDCJDEJEj
E.JDDDDDc:J~[JL1Dc::J

NOTES:

(SPACE BAR)

The above codes are generated when the labeled key and the SH I FT key are
depressed but the CTRL key is not depressed.

* Indicates that it is not a code generating key.
A blank key indicates strobe inhibit.

FIGURE 3-4. SHIFTED CHARACTERS, STANDARD ASCII

3-5

DDDDDDDDDDDDill:1
r::I
r::l
BBB@TI0E1GEJ
rCT:~] B ~~~~ B B B [:] G El c:J D BIREP;ATI
EJBBBEJEl0EJDDDEJ

~
L:J ~
~ LJ ~

[

NOTES:

TAPE

(DC2)

(SPACE BAR)

The above codes are generated when the labeled key and the
CTR L key are depressed but the SH I FT key is not depressed.

*Indicates that it is not a code generating key.

blank key indicates strobe inhibit.

FIGURE 3-5. CONTROL CHARACTERS, STANDARD ASCII KEYBOARD

DDDDDDDDDDDD[fE]
BDDDDDDDDBB00
BDDDDDDDBc:JDEJEJ
c::JDDDDDc:JBDDDc::J
I

NOTES:

(SPACE BAR)

The above codes are generated when the labeled key and the SH I FT
key and the CTRL key are depressed.

* Indicates not a code generating key.

blank key indicates strobe inhibited.

FIGURE 3-6. SHIFT AND CONTROL CHARACTERS, STANDARD ASCII KEYBOARD

3-6

SECTION IV
GENERAL INSTRUCTIONS FOR ASR OPERATION

and then transmitted to the line, to tape (sent
through the record buffer), and/or to the
printer. In RECORD, one block is loaded in the
record buffer (from the line, playback buffer,
or keyboard) and then recorded on tape. The
contents of the record buffer can be edited
before recording. A buffer is an intermediary
memory device in the ASR electronics.

4-1 GENERAL.
To completely understand 733 ASR Data Terminal
operation, read Section III fir$t. Operations applying to the
KSR unit also apply to the ASR unit, and these common
operation~ are covere-d in Section III. This section describes
general operations and functions of the ASR Data
Terminal. Specific step-by-step instructions for particular
operations are contained in Section V.

4-2 DEFINITIONS.

PRINTED LINE - One typed line consists of
80 or less characters; maximum length is 7.9
inches.

LINE, ON-LINE - Data received from, or sent
to, another terminal, computer, or other
remote device is transmitted over a "line" or
cable. When the data terminal is "on line," it is
sending or receiving data through a "line" or
cable.

LOCAL - When the data terminal or any of its
separate functions (printer, keyboard, etc.) is
not sending or receiving data over the "line," it
is operating "locally," i.e., only within itself.
Some functions can be on line while others are
local at the same time.

The following terms are used throughout the instructions.
a.

BLOCK - In the LINE tape format a block
generally corresponds to one printed line of up
to 86 data and control characters, terminated
by either a carriage return or the 86th character
of the block. In the CaNT (continuous) tape
format, a block is always 86 characters long and
may consist of several printed lines. Figure 4-1
shows the format of a block of tape recorded
data.
RECORD AND PLAYBACK BUFFERS Recording and playback with tapes is done by
blocks of characters, not by individual
characters. In PLAYBACK, one block is
transferred from tape to the playback buffer

Postamble

Gap

1 Character
Preamble

S
~

(01010101)

Gap=
Erase

(01010101)

2 Spare
Characters

86
Characters
8-bit
Printable
or
Control
Characters

2-Null
'Characters
(00000000)

1 Character
Postamble

Gap

Preamble

~
~
(01010101)

Gap=
Erase

(01010101) ~

"
1"".......- - - - - - -

1 Block of Data

FIGURE 4-1. MODEL 733 MAGNETIC TAPE DATA FORMAT

4-1

4-3 CONTROLS AND INDICATORS.
The ASR has three primary control areas: (1) the ASR
Module assembly display and control panel, (2) the
ON-LINE/OFF and master power switches, and (3) the
keyboard controls.
4-3.1 UPPER SWITCH PANEL. The ASR upper switch
panel (Figure 4-2) controls the ASR major devices:
keyboard, playback cassette, record cassette, and printer.
The switch panel is divided into three rows, each
corresponding to a major function:

Top row: Tape mode and tape motion control

Middle row: record and playback control and
editing

Bottom row: device functions (keyboard,
record, playback, and printer) and their
connections with an outside line or local loop.

A table in Appendix C summarizes typical ASR functions
and the switch settings for each. The following paragraphs
describe switch functions for each switch panel row.

r------- CASSETTE 1
REWIND

STOP

••
•

LOAD/FF

STOP

•

CASSETTE 2
RECORD

---.

READY

BLOCK
FWD

EOO

PLAYBACK

--J

•
•

LINE

LOCAL
KEYBOARD

••

LOAD/FF

STOP

L - RECORD.

CHARACTER

REV

OFF

REWIND

RECORD CONTROL

CHAR
FWD

••••••
~I fm'l~

ERROR

STOP

PLAYBACK •

READY

PLAYBACK CONTROL
CONT
START

OFF

TAPE FORMAT

LINE

OFF

LOCAL

PLAYBACK

PRINTER

BIT 1

FIGURE 4-2. ASR MODULE ASSEMBLY (UPPER UNIT) SWITCH PANEL

4-2

4-3.1.1 Top Row, Tape Cassette Control. The cassette
controls perform the following:

Tape REWIND.
This switch is used to rewind a tape (with
RECORD CONTROL to OFF). Actuating the
REWIND switch of the desired transport causes
the tape to slew at high speed toward the
beginning of the tape until the STOP switch is
actuated or clear leader is sensed.

Select which tape cassette will be played back or
recorded on
Rewind, fast forward, and load (ready) the cassettes

Always rewind tape:
Describe tape position and readiness using indicators.
Table 4-1 lists functions of each top row switch.
a.

Tape FAST FORWARD.
Momentarily actuating the LOAD/FF switch
after a load cycle has been performed (tape not
on clear leader) causes the tape to move
forward at high speed until STOP is actuated or
the clear leader is sensed. The fast forward
operation is useful in advancing the tape to the
opposite end or for performing a tape search
for editing purposes.
CASSETTE 1
REWIND

LOAO/FF

II
STOP

STOP

•

After a tape is inserted in a transport

After every initialization of power

Before removing a tape from a transport

Before switching off power to the terminal.

To rewind a tape which is on clear leader with thetakeup
reel (reel on the left) full and the END indicator
illuminated, the REWIND switch must be depressed until
the END indicator extinguishes. The tape is then past the
clear leader.
CASSETTE 2

RECORO

@I'> AEADY
@I'> END
•

t,~::

PLAYBACK

END.

......I

L--

RECORD •

REWIND

STOP

LQAO/FF

STOP

TABLE 4-1. TAPE CONTROL SWITCHES (SWITCH PANEL TOP ROW)
Switch/Indicator

Function

REWIND/STOP

REWIND causes the tape to slew toward the beginning-of-tape; continues until clear leader is
sensed or STOP is pressed.
LOAD/FF/STOP
After rewinding to tape beginning, the cassette is "loaded;' by pressing LOAD/FF Tape
moves forward to the beginning-of-tape marker, then stops. Pressing LOAD/FF again causes
the tape to slew forward at high speed to the end-of-tape unless STOP is depressed.
NOTE
REWIND and LOAD/FF are inoperative when RECORD CONTROL or PLAYBACK
CONTROL (second row of switches) are ON (see paragraph 4-10).
PLAYBACK/RECORD
Selects which cassette is in playback mode or record mode (cassette 1 or 2); cassettes
Switch
automatically switch to opposite modes.
PLAYBACK/RECORD
Indicate cassette is in playback or record mode.
Indicator Lamps
END Indicator Lamps
Illuminate when clear leader is sensed at either end of tape.
READY Indicator Lamps Illuminate when cassette is ready for applicable record or playback operation. Conditions are
described in paragraph 4-4.4.c.

4-3

Select whether recording will be in line or continuous
tape format

4-3.1.2 Middle Row, PLAYBACK and RECORD Controls.
Some of the functions performed by the PLAYBACK and
RECORD controls are the following:

Perform the edit functions. Editing is conducted in
the LOCAL mode only (off-line).

Allow print or erasure of blocks while recording

Table 4-2 lists functions of each middle row switch.

Start and stop tapes during recording or playback

RECORD CONTROL

PLAYBACK CONTROL

CHARACTER

C
••••••••)

~
ERROR

II)

N
T

•:,;"

I
ON

',<'

OFF

TABLE 4-2. PLAYBACK/RECORD CONTROL SWITCHES (SWITCH PANEL MIDDLE ROW)

Switch/Indicator

Mode

P
L
A
Y
B

CHAR FWD

Function
Momentarily pressing CONT START begins continuous playback of the
cassette designated by the illuminated PLAYBACK light. Tape will stop when
clear leader is sensed or STOP is momentarily pressed. This switch is further
explained in para. 4-6.2.

CONT START/STOP

BLOCK FWD/REV

A
C
K

Momentarily pressing BLOCK FWD causes the next block on tape to be read
and played back, or the remainder of a block should the playback of that
block have been stopped in the middle. Momentarily pressing REV causes the
tape to back up one block and stop (used in block locating).
Momentarily pressing CHAR FWD allows reading out the playback buffer one
character at a time. If the buffer is empty, the next block will be entered in
the buffer from tape, and the first character will be read. Character can be
read on the CHARACTER display if duplicating a tape or on printer.

ON Indicator Lamp

Illuminates when PLAYBACK CONTROL is in use.

ERROR Indicator Lamp

Illuminates when a missing flux reversal on the tape is found during playback.

4-4

........

PLAYBACK CONTROL
CONT
START

BLOCK
FWO

CHAR
FWD

RECORD CONTROL

o
ON

CHARACTER

ERROR

c
a

PAINT

)

(

fFF'T'T:=i1

~~~¥,::::;#.J

TABLE 4-2. PLAYBACK/RECORD CONTROL SWITCHES (SWITCH PANEL MIDDLE ROW) (Concluded)

Switch/Indicator

Mode

Function

CHARACTER Indicator
Lamps

Shows 7-bit ASCII code (Table 3-2) of the character being addressed in the
Record Buffer. Bits 1 to 8 read from left to right. Bit 8 is used internally by
the terminal.

LINE/CONT
(TAPE FORMAT switch)

This two-position switch controls the recording tape format. When the switch
is in the LINE position, recording of data on tape is initiated by the ASCII
carriage return character or the 86th character of each block. Therefore, each
block of data normally corresponds to one line of printout on the printer.
This format is especially helpful when preparing and/or editing a tape on the
recorder. With the TAPE FORMAT switch in the continuous (CONT)
position, recording of data on tape is initiated only by the 86th character of
each block. Therefore, each block of data on tape may contain several lines of
printout on the printer. This format is especially useful when maximum tape
storage is desired. Tapes recorded in one format may be easily converted to
the other format through the tape duplicating process (para. 4-9.1.c.).

R
E

PRINT /ERASE

o
R
D

This switch is used to check record buffer contents during editing. The
PRINTER and RECORD switches must be set to LOCAL. Contents of the
record buffer will be printed out (but not recorded on tape) when PRINT is
pressed (explained in para. 4-5.5); buffer contents will not be affected.
Pressing ERASE will erase record buffer contents but not affect data
recorded on tape (explained in para. 4-5.6). To erase an entire tape cassette,
load tape in RECORD, press and hold ERASE, press OFF, release OFF,
release ERASE. Tape erasure will continue until OFF is again pressed. This is
explained in para. 4-7.

ON/OFF

This switch turns on the recorder and RECORD CONTROL, allowing receipt
of data, and turns off RECORD CONTROL, transferring contents of the
record buffer (if any) to tape. If ERASE is pressed before or during actuation
of OFF and OFF is released first, tape erasure will be initiated and continue
until OFF is pressed again.

ON Indicator Lamp

Illuminates when RECORD CONTROL is in use.

4-5

4-3.1.3 Bottom Row, Device Controls. The functions of the
major ASR devices are controlled by the bottom row of
switches, as follows:

Disconnect the devices from both the local loop and
outside communication line (OFF).
Table 4-3 lists functions of each bottom row device mode
switch.

Select whether to connect the devices to the local
loop or to the outside communication line (LINE,
LOCAL)

KEYBOARD

LINE

OFF

LOCAL

RECORD

PLAYBACK

PRINTER

TABLE 4-3. DEVICE FUNCTION SWITCHES (SWITCH PANEL BOTTOM ROW)

Setting
LINE/OFF/LOCAL

Function
The LINE/OFF/LOCAL switches are used to connect the keyboard, playback, recorder, and
printer to the local loop or to the line loop. Devices set to LOCAL are interconnected but not
connected to the line loop. When the terminal ON-LINE/OFF switch adjacent to the keyboard
is set to ON-LINE, devices set to LINE will be interconnected and also connected to the line
loop if in half duplex. In full duplex, the keyboard and playback can be connected to the
transmit line; and the recorder and'printer can be connected to the receive line. Devices set to
OFF are disconnected from both the line and local loops.

4-6

4-3.2 ON-LINE/OFF SWITCH (FIGURE 4-3). In ON-LINE,
the terminal is set up to communicate with external devices
through the line interface. The terminal transmits to the
outside line from the keyboard or playback tape and
receives data on the printer or recorder tape. In the ASR,
local operation is normally controlled from the upper
switch panel LINE/OFF/LOCAL switches (Figure 4-2)
while the terminal ON-LINE/OFF switch remains set to
ON-LINE. The ON-LINE/OFF switch is set to OFF when it
is advisable to disconnect the entire terminal from the
communications line. When set to OFF, the printer and
keyboard are automatically set to the local mode if the
upper switch panel PRINTER and KEYBOARD switches
are set to either LINE or LOCAL. The playback and
recorder, however, are held in the off state unless their
bottom row LINE/OFF/WCAL switches are set to
LOCAL.

ON-

OFF
FIGURE 4-3. TERMINAL ON-LINE/OFF SWITCH
AND POWER SWITCH

as many times as necessary. If the
PRINTER switch is in LOCAL, the
printhead will move with actuation of
these switches to help locate the
character. No code is transmitted.

4-3.3 KEYBOARD OONTROLS. The standard USASCII
keyboard special function keys are the following (see
Figure 4-4). Other keys are described in Section III.
HERE IS
TAPE, TAPE
-1---

POWER

liNE

These two keys are used in the local
mode to edit data in the record buffer.
After placing chai'acters in the record
buffer, tape reverse (TAPE) backspaces to
a character in error ,'" then the character
can be changed from the keyboard. To
return to the point where the tape reverse
was started, actuate tape forward (TAPE)

Depressing this key with the terminal
on-line and the KEYBOARD
LINE/OFF/LOCAL switch to either
LINE or WCAL, activates the optional
automatic Answer-back Memory, and the
answer-back message (21 characters
maximum) is transmitted to the line. The
Answer-back Memory option is further
explained in Appendix B.

DDDDDDDDDDDDBEJ D
DDDDDDDDDDDDD D
DDDDDDDDDDDDD
CJDDDDDDDDDDc=J
I

FIGURE 4-4. USASCII KEYBOARD SPECIAL FUNCTIONS KEYS

4-7

4-4 CASSETTE TAPE PREPARATION (TAPE
LOAD) AND REMOVAL.

illuminate. A cassette in the record mode,
without the write tabs in place, will not accept
a load operation (see paragraph 4-4.1).

Use only digital-grade magnetic tape cassettes which meet
TI Specification No. 960333 or applicable ANSI, BEMA,
and ECMA standards.

4-4.1 TAPE WRITE TABS. Before inserting a tape cassette
into a transport, check the status of the write tabs on the
bottom of the tape. If the tape is to be written on, the tab
for the side of the tape to be written on should cover the
hole in the cassette case; if it is a read-only tape, the tab
should not cover the hole.' Holding a tape cassette in front
of you with the tape side up, the write tab for that side of
the tape will be on the bottom right of the tape cassette.
See Figure 4-5.
4-4.2 TAPE CASSETTE INSERTION. Insert the tape
cassette into the selected transport as shown in Figure 2-3.
The supply reel will be on the cassette right and the takeup
reel on the left. If the tape is not rewound (END indicator
illuminated and supply reel full), rewind after insertion.

Always rewind the tape before removing
a tape or turning off power to ensure that
no data "glitches" are written by
accident, and that a minimum of dust and
smudges will get on the tape. Following
this precaution and keeping tapes in their
cases when not in use will enhance tape
cleanliness (and thereby data reliability).

After a load operation, the transport is ready to
record or playback data, provided the READY
indicator for that transport is illuminated.
Necessary conditions for the transport to be
ready are as follows:
(1)

The cassette is in place.

(2)

The write enable tab is in place (record
mode only). See paragraph 4-4.1)

(3)

The cassette transport door is closed.

(4)

The associated LINE/OFF/LOCAL
control is set to LINE or LOCAL. If set
to LINE, the ON-LINE switch at the
power switch panel must be set to
ON-LINE.

(5)

The end-of-tape clear leader is not sensed.

(6)

A fast-forward
progress.

to exist while an operation is in progress
(condition 6 is locked out while operation is in
progress), the operation is terminated, the
record and/or playback buffers are cleared, and
the control logic is reset (i.e., operation
terminates).
TAPE SIDE UP

4-4.4 CASSETTE "LOAD" AND TRANSPORT READY.

rewind is not. in

If any of the first five of these conditions ceases

4-4.3 TAPE CASSETTE REMOVAL. To remove a tape
cassette from a transport, open the transport door outward
to the first stop. A quick downward motion from that
point should "pop" the tape out of the transport. Always
rewind tape before removal or power turnoff.

After a tape has been properly inserted in a
transport, momentarily press REWIND. The
tape will rewind to the clear leader at tape
beginning and the END light will illuminate.

0
Side 1

Perform a load operation to make the cassette
ready for playback or record: momentarily
press the LOAD/FF switch to load the tape.
The tape will advance forward until the BOT
marker is sensed, and the READY lamp will

WRITE TAB FOR SIDE 1

FIGURE 4-5. TAPE CASSETTE WRITE TABS

4-8

4-5 TAPE RECORDING OPERATIONS.
Before initiating a record or playback operation, check that
the desired cassette is in the RECORD or PLAYBACK
mode. If not, actuate the RECORD/PLAYBACK switch
(top row of switch panel) as necessary (RECORD
CONTROL and PLAYBACK CONTROL must be OFF, and
there should be no tape motion). The state of each tape
transport (playback or record) is indicated by the
PLAYBACK and RECORD lamps and the READY and
END (end of tape) lamps.

4-5.2 RECORDING LIMITATIONS. In the LINE tape
format, it is possible to receive data from the line at a faster
rate than it can be recorded. For example, at 30
characters-per-second transmission rate, a carriage return
can be sent (causing a block to be written) in ASCII code.
every 33.3 milliseconds. Record control takes 250
milliseconds to write each block initiated by a carriage
return. Thus, if 7 or fewer characters are sent with carriage
returns (in this example), data is being transmitted faster
than it is being recorded (i.e., 7 characters times 33.3 msec
= 233 msec or less time than it takes to record a block).
Hence, data can be lost if some constraints 'are not placed
on the maximum number of blocks (carriage returns) sent
to the recorder in a given time.

4-5.1 BLOCK RECORDING TECHNIQUE. The ASR
records data on tape by blocks, with approximately six
blocks per foot of tape, or 1800 blocks per 300-foot
cassette. Each block of data is separated by an interblock
gap (no data), with the following information included in

A block counter within the cassette controller allows up to
16 blocks to be remembered, giving the recorder greater
flexibility. If all blocks transmitted to the recorder require
at least 250 milliseconds to transmit (250 milliseconds
between carriage returns), the recorder will never lose data.
If a string of blocks are to be transmitted which requires
less than 250 milliseconds between them (less than 250
milliseconds between carriage returns), the following
formula must be followed to prevent loss of data.

each block:
a.

Preamble (8 bits)

86 eight-bit characters

Two unused characters (8 bits each)

Postamble (8 bits).

B <4T + 14.8
where,

A block of data is terminated and recorded on tape from
the record buffer after one of the following events:

The 86th character in a block is entered into
the record buffer (LINE or CONTinuous tape
format).

A carriage return is received by the record
buffer (LINE tape format only).

The RECORD CONTROL OFF switch (switch
panel middle row) is actuated with data still in
the record buffer (LINE or CONTinuous
format). Unfilled character positions of that
block are filled with null characters.

number of bIocks (carriage returns) sent

time in seconds to send B number of
blocks or
total characters
characters per second rate

less than

4-5.3 CHARACTER DISPLAY. As data is entered into the
record buffer, the US ASCII code of the last character
entered is displayed on the CHARACTER display,. This
display shows bit 1 (least significant bit) on the left and bit
8 on the right. USASCII codes are identified in Table 3-2.

If fewer than 86 characters are entered into the record
buffer prior to terminating a block, unused character
positions in the block are filled with null (00000000)
characters. If more than 86 characters are generated, the
corresponding data is recorded in two or more blocks. If
data is written on tape in line format (each block normally
equals one printed line), editing of tapes is an extremely
easy operation. Line and continuous formats are chosen by
setting the TAPE FORMAT CONT/LINE switch (switch
panel middle row).

RECORD CONTROL
CHARACTER

c••••••··)

~•••. ~/. ~.:..
..

'..

ERASE

4-9

OFF

4-5.4 RECORDING THE BUFFER DATA. Data is
recorded on tape from the record buffer by any of three
actions:
a.

When a carriage return signal is received from
the keyboard, line, or tape, the data in the
buffer is recorded on tape. The TAPE
FORMAT switch (switch panel middle row)
must be set to LINE. In this manner, data is
recorded in a line format, with the line
terminated by a carriage return.
If 86 characters are received in the record
buffer (ruling a data block), the data in the
buffer will be written on tape when the 86th
character is received in either line or continuous
tape format. The 87th character will then
become the first character in the next block. If
set to LINE format (switch panel middle row),
the contents of the record buffer will be
recorded at carriage return, or will be recorded
at the 86th character if no carriage return is
received. If set to CONT format, the record
buffer contents will be recorded on tape at the
86th character only.

4-5.5 INSPECTING CONTENTS OF RECORD BUFFER.

If RECORD and PRINTER (switch panel lower row) are set
to LOCAL, the contents of the record buffer can be printed
out for inspection before recording on tape. By pressing
PRINT (panel second row), the printer will print out the
buffer contents. By using the keyboard and tape forward
and reverse keys (TAPf' T~APE), the contents can be
changed (explained in paragraph 4-5.8).
4-5.6 ERASING ENTIRE RECORD BUFFER. The
contents of the entire record buffer (one brock) can be
erased by actuating the ERASE switch. This can be done
only if RECORD is set to LOCAL. This operation clears the
record buffer but does not affect data already on tape.
4-5.7 TERMINAL SETUP. Before initiating a record
operation, check the following conditions:
a.

Set the terminal ON-LINE switch (adjacent to
keyboard) and device mode switches (bottom
row of switch panel) to the desired positions
(LINE, OFF, or LOCAL). If a device is set to
LINE, the terminal switch must be set to
ON-LINE.

The cassette tape is properly inserted and
loaded (described in paragraph 4-4).

If the RECORD CONTROL ON/OFF switch is
NOTE
If the cassette write tabs are removed, the
tape will not load in the RECORD mode.

set to OFF, the data in the record buffer (if
any) .will be recorded on tape. In this way,
short blocks (less than 86 characters) can be
recorded without using the line format (with a
carriage return) or recording a full 86-character
block in continuous format.
In all cases, the block will be recorded on tape as 86
characters. The record control automatically fills out the
block to 86 characters with null characters if there are less
than 86 characters in the block.

Set the a p pro p ria t e cas set t e
RECORD/PLAYBA,CK switch (upper row,
switch panel) to RECORD. The RECORD
CONTROL switch must be OFF

To initiate recording, set the RECORD CONTROL to ON.
If the ON indicator lamp does not glow, recheck the
terminal setup.

4-10

be changed. When a printable-character key is
pressed, the printer first prints the character,
then shifts one space to the new address.

4-5.8 EDITING WHILE RECORDING. When recording in
the local mode from the keyboard to the tape or from tape
to tape (duplication), changes can be made to the data in
the record buffer (before recording on tape) using the
TAPE and TAPE keys located on the keyboard.

- a.

Set all four bottom row switch-panel switches
to LOCAL.

Load and ready tapes so that the READY
lamps illuminate (paragraph 4-4.4). Set
RECORD CONTROL to ON. Begin recording.

When at the correct address, type in the new
character (or retype the remainder of the line).
After changing one or several characters, use
TAPE to return to the end of the line where
t yping can continue or the block can be entered
on tape (use a technique in paragraph 4-5.1).

To change a character, use the CHARACTER
display to determine (in ASCII code) the
character being "addressed." If recording from
keyboard to tape with the printer, it will be the
last character typed and will also be the
character immediately to the left of the
printhead. If a new character is entered, this
character will be inserted immediately after the
addressed character. For example, if you wish
to change the "3" in the series "1234," use
TAPE to read the "2" in the CHARACTER
display (the left edge of the printhead will
cover the 3 with the 2 showing immediately to
the left). By pressing a new character, the 3 will

New characters can replace old characters only
on a character-for-character basis. If additional
characters are to be inserted, retype the
remainder of the line.

If you wish to check the block before entering
on tape, press PRINT (second row of switch
panel). The buffer will be printed out, but
buffer contents will not be affected. To print
on a clean line with the printhead starting at
the left margin, first press PAPER ADV (no
code will be transmitted).

To change an entire line, press ERASE (switch
panel middle row), PAPER ADV (to return
printhead to left margin), and retype new line.

LOAD/FF

STOP

RECORD CONTROL
CHARACTER

c••••••••)
~ Irl"'lF'11 ~
TAPE FORMAT

4-11

~~
ERASE

OFF

4-6 PLAYBACK OPERATIONS.
Before initiating a playback operation, check that the
desired cassette is in the PLAYBACK mode. If not, actuate
the RECORD/PLAYBACK switch (top row of switch
panel) as necessary (RECORD CONTROL and PLAYBACK
CONTROL must be OFF, and there can be no tape
motion). The state of each tape transport (playback or
record) is indicated by the PLA YBACK and RECORD
lamps and the READY and END (end of tape) lamps.

data will be transferred from tape to the playback buffer,
and the first character will be read out of the buffer.
4-6.5 LOCATING A BLOCK ON TAPE. To locate a
particular block of data recorded on a tape, proceed as
follows:

4-6.1 TERMINAL SETUP. Check the following conditions:
a.

The POWER switch is ON.

The terminal is functioning properly, with the
terminal ON-LINE/OFF and device
ON/OFF/LOCAL switches set as desired.

The cassette tape is properly inserted and
loaded (paragraph 4-4.4), and the desired
cassette is in the PLAYBACK mode.

4-6.2 CONTINUOUS PLAYBACK. Momentarily actuate
the CONT START switch and the tape will be read
continuously until the (CONT) STOP switch is actuated, or
the tape reaches the end (clear leader), or an error occurs.
Procedures for errors are described in paragraph 4-8.
4-6.3 BLOCK FORWARD/REVERSE. To play back one
block at a time, momentarily depress the BLOCK FWD
switch. The next block on tape will be read and
transmitted, and playback will stop. If an error is indicated,
proceed as described in paragraph 4-8. The BLOCK FWD
switch may be used to transmit the remaining contents of a
block which has been terminated during playback· by the
CONT STOP switch. The block reverse operation is
initiated by momentarily actuating the BLOCK REV
switch. This will back up the tape one block and clear the
contents of the playback buffer. No playback occurs.

Set the PRINTER and PLAYBACK switches to
WCAL. Set the cassette to PLAYBACK.

Momentarily press either the REWIND or
WAD/FF switch to advance or reverse the tape
to the approximate location of the desired
block.

When the tape reaches the approximate
location, stop the rewind or fast-forward
operation by momentarily pressing the
applicable STOP switch (REWIND or
LOAD/FF).

Press the BLOCK REV switch to set the tape to
an interblock gap.

Press the BLOCK FWD switch to print out the
next block recorded on tape.

If this printed block is still not near the desired
block, repeat the above procedure starting with
step b. If the printed block is near the desired
block, use either BLOCK FWD or BLOCK REV
to approach the desired block.

Always approach in the forward playback
direction; i.e., use BLOCK REV to retreat
past the desired block, then use BLOCK
FWD to print out the block immediately
before the desired block. Thus you will
ensure being located at the beginning of
the desired block.

4-6.4 CHARACTER FORWARD. Momentarily actuate
CHAR FWD, and one character will be read out of the
playback buffer. If the buffer is empty, the next block of

4-12

4-7 ERASING A TAPE CASSETTE.
a.

Press and hold the ERASE switch and then
press the RECORD CONTROL/OFF switch.
Release OFF first, then release ERASE.

To stop tape erase, momentarily press the
RECORD CONTROL/OFF switch again.

Set the cassette-to-be erased to RECORD
(upper row of switch panel). Tape must not be
at the beginning (clear leader); if so, perform a
load operation (paragraph 4-4.4).

II ;~·t~~i II
II o

.---_ _ _ _ CASSETTE 1
REWIND

LOAD/FF

STOP

•

CASSETTE 2

PLAYBACK

--J

L--

RECORD

PLAYBACK CONTROL
BLOCK

CHAR

FWD

STOP

RECORO CONTROL

STOP

CASSETTE 2

PLAYBACK

RECORD

READY

READY
END

END

PLAYBACK

RECORD

PLAYBACK CONTROL
CaNT
START

CHAR
FWD

REWIND

LOAD/FF

STOP

RECORD CONTROL
ON

C·.· •..•.)
CHARACTER

ERROR

KEYBOARD

0
0
0
0

N
T

OFF

PLAYBACK

RECORD

5-7

PRINTER

LOCAL OPERATIONS
(9)

5-1.5 HIGH-SPEED TAPE DUPLICATION (NO
PRINTOUT). While duplicating a tape at high s~ed (250
characters per second, maximum), nd other local operations
may be carried out. Proceed as follows for high-speed tape
duplication.

When the END lamp lights, press LOAD/FF.
The READY lamp should light after a few
seconds.
Set CASSETTE 1 to PLAYBACK; CASSETTE
2 will be in RECORD.
Press the RECORD CONTROL/ON switch. The
ON lamp should light.
Set the TAPE FORMAT switch to the tape
format desired for the copy tape (LINE or
CONTinuous).
Press the CONT START switch to begin
high-speed tape duplication. Data will be
transmitted from CASSETTE 1 to CASSETTE
2 (original tape to copy tape) until the END
lamps light.

(10)
(11)

On the lower row of the ASR panel, set
(1) KEYBOARD to OFF
(2) PLAYBACK to LOCAL
(3) RECORD to LOCAL
(4) PRINTER to OFF

(12)

(13)

Insert the tape cassette to be duplicated (original tape) into
the CASSETTE 1 transport.
(5) Set RECORD CONTROL to OFF
(6) Press CASSETTE 1 REWIND
(7) When the END lamp lights, press LOAD/FF.
The READY lamp should light after a few
seconds.

NOTE
To stop the duplication process at any
point, press (CONT) STOP.

Insert the copy tape cassette into the CASSETTE 2
transport, and:
(8) Press CASSETTE 2 REWIND

'
"
.
"
.
8
~~:" 1 '~:~: g
I

, . . . - - - - - CASSETTE 1

_ _ _ _-.1

CASSETTE 2

REWIND

STOP

PLAYBACK

--l

L-

PLAYBACK CONTROL
CONT
START

CHAR
FWD

KEYBOARO

RECORO

REWIND

LOAO/FF

STOP

RECORD CONTROL
CHARACTER

C
••••••••)

PLAYBACK

RECORD

5-8

PRINTER

LOCAL OPERATIONS
(5)

5-1.6 ERASE A TAPE CASSETTE.

Press-and-hold the RECORD CONTROL/ERASE
switch and press the RECORD CONTROL/OFF
switch. Release the OFF switch, then release
ERASE. The tape side will be erased when the
cassette END lamp lights.

NOTE
The write tab must be in place on the
bottom of the cassette to permit erasure.

_ J

NOTE
To stop tape erasure for any reason, press
the RECORD CONTROL/OFF switch.

To erase an entire side of a tape cassette, insert the tape
cassette into either cassette transport.
(1) Set RECORD CONTROL (middle row) to
OFF.
(2) Set the cassette to be erased to RECORD
(upper switch row).
(3) Press the REWIND switch of the tape to be
erased.
(4) When the END lamp lights, press LOAD/FF.
The READY lamp should light after a few
seconds.

o
o
o
o

To erase the other side of the tape cassette, open the
cassette transport door to pop out the cassette, and turn
the cassette around so that the opposite side faces you.
Reinsert into the cassette transport and repeat steps (1)
through (5).

CASSETTE 2

CASSETTE 1
REWIND

STDP

LDADIFF

STOP

RECDRD

---, r -

READY
END

PLAYBACK

---l

READY

END

L--

CHAR
FWD

RECDRD

0
0
0
0

REWIND

LDADIFF

STDP

RECORD CONTROL

PLAYBACK CONTROL
CDNT
START

PLAYBACK

c.·.·····)
CHARACTER

ERRDR

KEYBDARD

DFF

RECDRD

PLAYBACK

5-9

PRINTER

LOCAL OPERATIONS
5-1.7 DUPLICATE TAPE AND EDIT COpy TAPE.
Information on a tape cassette may be changed, added, or
deleted while duplicating a tape. No other operations can
be carried out while editing a tape, such as transmitting or
receiving from the line.

The data terminal is now ready to begin recording,
printout, and editing functions. For the specific editing
function required, see the following instructions.

ADDING BLOCK(S) OF DATA DURING DUPLICATION.
Several degrees of editing are possible while duplicating a
tape. One or several characters in a block may be changed,
or an entire block or several blocks may be added or
deleted. Load and ready the tape cassettes for duplication
and editing as follows.

,--

To add a block of data during tape duplication, you must
stop the duplication process at the point on tape before the
block to be added. To do this, proceed from step (12)

above as follows.

NOTE
All editing operations affect only the
copy (duplicate) tape, not the original
tape. The original tape will remain
unchanged unless an operational mistake
is made. If you wish to completely
protect the original tape, remove the
write tabs from the bottom of the
cassette.

Press CONT START to start tape duplication
and printout of the original tape.

When the printout nears the block to be added,
press (CONT) STOP.

Press BLOCK FWD to print out and duplicate
the remainder of the block.

Press BLOCK FWD to duplicate and print out
blocks one at a time until the tape reaches the
block before the block to be added. When you
are sure the tape is located at the beginning of
the block to be added (the end of the previous
block), type in the new block or blocks.

Terminate each new block with a carriage
RETURN, or press both LINE FEED and
RETURN for a conventional typewriter
carriage return (depending on tape format
needed).

When all new blocks are added, press CONT
START to resume normal tape duplication and
printout. To change later blocks in the tape,
repeat steps b. through f. above.

'--

(1) to (4) On the ASR panel lower switch row, set
all four switches to LOCAL.
Insert the tape cassette to be duplicated (original tape) into
the CASSETTE 1 transport, and
(5) Set RECORD CONTROL to OFF
(6) Press CASSETTE 1 REWIND
(7) When the END lamp lights, press LOAD/FF.
The READY lamp should light after a few
seconds.
Insert the copy tape cassette into the CASSETTE 2
transport, and:
(8) Press CASSETTE 2 REWIND
(9) When the END lamp lights, press LOAD/FF.
The READY lamp should light after a few
seconds.
(10) Set CASSETTE 1 to PLAYBACK; CASSETTE
2 will be in RECORD.
(11) Press the RECORD CONTROL/ON switch. The
ON lamp should light.
(12) Set the TAPE FORMAT switch to the tape
format desired for the copy tape (LINE or
CONTinuous).

NOTE

If a mistake is made while typing a new
block, press TAPE (backspace) as many
times as necessary until the printhead
moves back just over the incorrect
character. Then type in the correct
character( s) . Press T APf (forward space)
to return to the point where you stopped
or retype the remainder of the block. Do
NOT use the space bar to advance to the
original point; press only the TAPE key!

5-10

LOCAL OPERATIONS

._1

DELETING BLOCK(S) OF DATA WHILE DUPLICATING
TAPE.

CHANGING SINGLE
DUPLICATING TAPE.

To delete a block or several blocks of data from the copy
tape while duplicating a tape, proceed from step (12) above
as follows:

To change one or more characters on the copy tape while
duplicating (the original tape will not be changed), proceed
from step (12) above as follows:

Press CONT START to begin tape duplication
and printout of the original tape.

When the printout nears the block to be
deleted, press (CONT) STOP.

When the printout nears the block containing
characters to be changed, press (CONT) STOP,

Press BLOCK FWD to print out and duplicate
the remainder of the block.

Press BLOCK FWD as necessary to print out
and duplicate blocks one at a time until the
tape prints out the block before the block to be
deleted. When you are sure the tape is located
at the end of the block before the block(s) to
be deleted, proceed as follows:
(1) Set RECORD CONTROL to OFF.
(2) Press BLOCK FWD once for each
block(s) to be deleted. Set PRINTER to
OFF if you do not want to print the
deleted block(s).
(3) Set RECORD CONTROL to ON (and
PRINTER to LOCAL if you wish to
resume printout) and press CONT
START to continue tape duplication.

Press CHAR FWD until the character to be
changed is printed out, then:
(1) Press TAPE and "strike over" the new
character(s) or space.
(2) Press BLK FWD to print out and record
the remainder of the line.
(3) Press CONT START to resume
continuous duplication, or press BLK
FWD to print out and duplicate one
block at a time.

r----

I, I oo I I: I'
II
II
I I
REWIND

CASSETTE 1

LOADJFF

RECORD

~ ~

CASSETTE 2

PLAVBACK

READY

END

STOP

WHILE

Repeat steps (1) and (2) above for each block
or group of consecutive blocks to be deleted.

CHARACTERS

STOP

END

PLAYBACK

L---

PLAYBACK CONTROL

CONT
START

BLOCK

RECORD

REWIND

LOADJFF

STOP

Q
Q
Q

RECORD CONTROL

CHAR

FWD

CHARACTER

c••••••••)

ERASE

OFF

ERROR

STOP

REV

LINE

OFF

LOCAL

KEYBOARD

LOCAL

PLAYBACK

RECORD

5-11

PRINTER

ON-LINE OPERATIONS
r--=-. ,
I

(3)
(4)
(5)

5-2.1 KEYBOARD TO LINE (NO PRINTOUT). To
transmit data over the line from the keyboard with no
printout on the ASR printer, proceed as follows.
On the ASR switch panel lower row, set
(1) KEYBOARD to LINE
(2) PLAYBACK to OFF

RECORD to OFF
PRINTER to OFF
Set the terminal ON-LINE/OFF switch (to right
of keyboard) to ON LINE.

Commence typing message.

CASSETTE 1
REWIND

STOP

LOADIFF

STOP

o
o
o

----,

READY
END

PLAYBACK

PLAYBACK CONTROL
CONT
START

CHAR
FWD

I
I

RECORD

---J

CASSETTE 2

.--

PLAYBACK

L--

REWIND

LOADIFF

STOP

,~'"O
0
END

RECORD

RECORD CONTROL
ON

c••••••••)
CHARACTER

ERROR

5
KEYBOARD

PLAYBACK

RECORD

PRINTER

5-12

POWER

~~~
OFF

ON-LINE OPERATIONS
(3) RECORD to OFF
(4) . PRINTER to LINE
(5) Set the terminal ON-LINE/OFF switch (to right
of keyboard) to ON LINE.

5-2.2 KEYBOARD TO LINE AND PRINT OUT*. To
transmit data over the line from the keyboard and make a
printout on the ASR printer, proceed as follows.
_

On the ASR switch panel lower row, set
(1) KEYBOARD to LINE
(2) PLAYBACK to OFF

Commence typing message. The keyboard will print out
whatever is typed. *

CASSETTE 1
REWIND

LDAD/FF

<0
<0
STOP

STOP

RECORD

----,

READY

BLOCK
FWD

CHAR
FWD

PLAYBACK

END

PLAYBACK

-.--J

L----

RECORD

CASSETTE 2

<0
0
<0
<0

REWIND

LOAD/FF

STOP

RECORD CONTROL

PLAYBACK CONTROL
CONT
START

I ""
i

o
ON

SHARACTER

C
•••••• ·.)

5
KEYBOARD

PLAYBACK

RECORD

PRINTER

POWER

&~~
OFF

*Only if the data terminal is in HALF DUPLEX; if in FULL DUPLEX the printer will not print out from the keyboard.

ON-LINE OPERATIONS
Insert a tape cassette into the CASSETTE 1 transport
(check that the write tab is in place on the bottom of the
cassette). Then,
(6) Set RECORD CONTROL to OFF (Middle row)
(7) Press CASSETTE 1 REWIND
(8) When the END lamp lights, press LOAD/FF.
The READY lamp should light after a few
seconds.
(9) Press the CASSETTE 1 RECORD switch.
(10) Set the TAPE FORMAT switch (middle row) to
CONT or LINE. The LINE format most closely
resembles conventional typewriting, but uses
more tape. The CONTinuous tape format
conserves tape. In either format, end a line of
type with a carriage RETURN and a LINE
FEED to produce conventional typewritten
hard copy.
(11) Set RECORD CONTROL to ON.

5-2.3 RECORDING ON TAPE AND TRANSMITTING ON
LINE FROM THE KEYBOARD. * The keyboard
transmission over the line may be recorded on tape. To
record and print out the keyboard messages, proceed as
follows.
NOTE
The recorder and printer will act upon
both keyboard and incoming on-line
messages if the terminal is in HALF
DUPLEX.
On the ASR switch panel lower row, set
(1) KEYBOARD to LINE
(2) PLAYBACK to OFF (switch position is
immaterial)
(3) RECORD to LINE
(4) PRINTER to LINE.
(5) Set the terminal ON-LINE/OFF switch to ON
LINE.

Commence typing. The message will be recorded on tape,
printed out, and sent over the transmission line.

,
L

i
J

I
I

CASSETTE 1
REWIND

STOP

LOAO/FF

STOP

(5)

I " "'
i

RECORD

--..,

READY
END

r--

END

PLAYBACK

--I

'---

PLAYBACK CONTROL
CONT
START

CHAR
FWD

PLAYBACK

RECORD

CASSETTE 2

0
00
0

REWIND

LOAO/FF

STOP

RECORD CONTROL
ON

CHARACTER

C·•••••••)

ERROR

5
KEYBOARD

PLAYBACK

RECORD

PRINTER

POWER

~ (j)~
OFF

*Possible only if terminal is in HALF DUPLEX.

5-14

ON-LINE OPERATIONS

- -)

Insert a tape cassette into the CASSETTE 1 transport
(check that the write tabs are in place on the bottom of the
cassette). Then,
(6) Set RECORD CONTROL to OFF.
(7) Set CASSETTE 1 to RECORD.
(8) Press CASSETTE 1 REWIND.
(9) When the END lamp lights, press LOAD/FF.
The READY lamp should. light after a few
seconds.
(10) Set the RECORD CONTROL switch to ON.

5-2.4 RECORD ON TAPE FROM THE LINE (NO
PRINTOUT). To record incoming messages sent over the
transmission line to the data terminal when no printout is
desired, proceed as follows.
On the ASR switch panel lower row, set

" ..... -1

(1)
(2)
(3)
(4)
(5)

KEYBOARD to OFF
PLAYBACK to OFF
RECORD to LINE
PRINTER to OFF
Set the terminal ON-LINE/OFF switch to
ON-LINE .

g~~:o 1 '~:~ g.~'"O

...-_ _ _ _ CASSETTE 1
REWIND

STOP

~.,'"
STOP

_ _ _ _""",

PLAYBACK

BLOCK
FWD

CHAR
FWD

--l

CASSETTE 2

L-

RECORD

STOP

........

LOAO/FF

RECORD CONTROL

PLAYBACK CONTRO L
CONT
START

The terminal will now receive and record messages on tape.

CHARACTER

(

PR, NT

)

STOP

ON
LINE

~~B

I
KEYBOARD

POWER

PLAYBACK

PR,NTER

RECORD

1
5-15

OFF

ON-LINE OPERATIONS
Insert a tape cassette into the CASSETTE 1 transport
(check that the write tabs are in place on the bottom of the
cassette). Then,
(6) Set RECORD CONTROL to OFF
(7) Set CASSETTE 1 to RECORD
(8) Press CASSETTE 1 REWIND
(9) When the END lamp lights, press LOAD/FF.
The READY lamp should light after a few
seconds.
(10) Set RECORD CONTROL to ON.

5-2.5 RECORD ON TAPE FROM LINE AND PRINT OUT.
To record incoming messages to the terminal on both tape
and hard copy printout, proceed as follows.
On the ASR switch panel lower row, set

(1)
(2)
(3)
(4)
(5)

KEYBOARD to OFF (position immaterial)
PLAYBACK to OFF (position immaterial)
RECORD to LINE
PRINTER to LINE
Set the terminal ON-LINE/OFF switch to
ON-LINE.

The terminal is now ready to tape record and print out
incoming messages.

r~·

\..L

o
o
o
o

CASSETTE 2

CASSETTE 1
REWIND

I
STOP

LDAD/FF

STOP

RECORD

READY
END

t'~:::g0

CHAR
FWD

PLAYBACK

h,·

--I

L--

RECORD

STOP

L..~,

RECORD CONTROL
ON

CHARACTER

c•••••• ··)

ERROR

STOP

LDAD/FF

END

PLAYBACK CONTRO L
BLOCK
FWD

REWIND

<0
ON

L·~.

ERASE

5
KEYBOARD

PLAYBACK

PRINTER

RECORD

5-16

POWER

~ (j)~
OFF

ON-LINE OPERATIONS
(3)
(4)
(5)

5-2.6 PRINT OUT FROM LINE ONLY (NO RECORD ON
TAPE). To print out incoming messages to the terminal
with no tape recording, proceed as follows.
On the ASR switch panel lower row, set
(1) KEYBOARD to OFF (position immaterial)
(2) PLAYBACK to OFF (positioll immaterial)

o
o
o
o

The data terminal is now ready to receive and print out
incoming messages.

CASSETTE 2

CASSETTE 1
REWIND

STOP

LOAO/FF

STOP

RECORD

BLOCK
FWD

II
I
STOP

CHAR
FWD

PLAYBACK

READY

END

PLAYBACK

RECORD

0
0
0
0

REWIND

LOAO/FF

STOP

RECORD CONTROL

PLAYBACK CONTROL
CONT
START

RECORD to OFF
PRINTER to LINE
Set the terminal ON-LINE/OFF switch to
ON-LINE.

c········)
CHARACTER

0
ON

ERROR

(0)

REV

KEYBOARD

LINE

OFF

LOCAL
PLAYBACK

PRINTER

RECORD

5-17

ON
LINE

~
OFF

POWER

~
--

ON-LINE OPERATIONS
5-2.7 PLAY BACK TAPE TO LINE ONLY (NO
PRINTOUT). To transmit a tape recording over the line
with no printout, proceed as follows.

(6)
(7)

On the ASR switch panel lower row, set
(1) KEYBOARD to OFF
(2) PLAYBACK to LINE
(3) RECORD to OFF
(4) PRINTER to OFF.

(8)
(9)

Press CASSETTE 1 REWIND
When the END lamp lights, press LOAD/FF.
The READY lamp should light after a few
seconds.
Set the terminal ON-LINE/OFF switch to
ON-LINE.
Press the PLAYBACK CONTROL (middle row)
CONT START switch; playback to line will
commence.

To stop playback before the end-of-tape, press (CONT)
STOP.

Insert the tape cassette to be transmitted into the
CASSETTE 1 transport. Then,
(5) Set CASSETTE 1 to PLAYBACK

.Jl.

!
I

I
.---_ _ _ _ CASSETTE 1
REWIND

LOAD/FF

0
0"

o
STOP

STOP

-----,

READY
END

PLAYBACK

PLAYBACK CONTROL
'CONT
START

CHAR
FWD

I
I

RECORD

--.J

CASSETTE 2

PLAYBACK

'---

READY
END

RECORD

REWIND

LOAD/FF

0
0

1
J

STOP

RECORD CONTROL
ON

CHARACTER

C••••••••)

ERROR

8
KEYBOARD

PLAYBACK

RECORD

PRINTER

POWER

~~~

OFF

5-18

;,~t'

,--"I

Ii.
ON-LINE OPERATIONS
(1)
(2)
(3)

5-2.8 PLAY BACK TAPE TO LINE AND MAKE
PRINTOUT.* To transmit a tape recording over the line
and make a hard copy printout simultaneously, proceed as
follows.
a.

On the ASR switch panel lower row, set
(1) KEYBOARD to OFF (position
immaterial)
(2) PLAYBACK to LINE
(3) RECORD to OFF
(4) PRINTER to LINE.
Insert the tape cassette to be transmitted into
the cassette 1 transport. Then,

STOP

LOADIFF

to
to
to

STOP

RECORD

BLOCK
FWD

CHAR
FWD

PLAYBACK

READY

END

PLAYBACK

Set the terminal ON-LINE/OFF switch to
ON-LINE, and press PAPER ADV.

Press the PLAYBACK CONTROL (middle row)
CONT START switch; playback transmission
and hard copy printout will commence.

To stop playback before the end-of-tape, press
(CONT) STOP.

RECORD

REWINO

LOADIFF

STOP

0
0

RECORD CONTROL

PLAYBACK CONTROL
CONT
START

CASSETTE 2

_----CASSETTE 1
REWIND

Set CASSETTE 1 to PLAYBACK
Press CASSETTE 1 REWIND
When the END lamp lights, press
LOAD/FF. The READY lamp should
light after aJew seconds.

CHARACTER

C
•• • •••••)

OFF

LOCAL
KEYBOARD

PLAYBACK

PRINTER

RECORD

*A printout is possible only if the data terminal is in HALF
DUPLEX.

5-19

OFF

ON-LINE OPERATIONS
5-2.9 PLAY BACK TAPE TO LINE AND MAKE
PRINTOUT FROM LINE. * To transmit a tape recording
from the terminal over the line and print out data received
from the line, proceed as follows.

(5)
(6)
(7)

On the ASR switch panel lower row, set
(1) KEYBOARD to OFF
(2) PLAYBACK to LINE
(3) RECORD to OFF
(4) PRINTER to LINE.

(8)
(9)

Set CASSETTE 1 to PLAYBACK
Press CASSETTE 1 REWIND
When the END lamp lights, press LOAD/FF.
The READY lamp should light after a few
seconds.
Set the terminal ON-LINE/OFF switch to
ON-LINE, and press PAPER ADV.
Press the PLAYBACK CONTROL (middle row)
CONT START switch; transmission of the tape
cassette will commence. The ASR is also ready
to print out incoming messages*.

Insert the tape cassette to be transmitted into the
CASSETTE 1 transport. Then,

CASSETTE 1
REWINO

LOAD/FF

I
II
STOP

STOP

o
o
o

,
--. .--

READY
END

PLAYBACK

-.J

BLOCK
FWD

STOP

CHAR
FWD

PLAYBACK

REWIND

LOAO/FF

STOP

""~O0
END

RECORD

RECORD CONTROL

PLAYBACK CONTROL

CaNT
START

CASSETTE 2

RECORD

o
ERROR

c···.····)
CHARACTER

I
N
N
T=====E

II
ERASE

OFF

8
KEYBDARD

PLAYBACK

RECORD

PRINTER

*A printout is possible only if the data terminal is in FULL DUPLEX.

5-20

POWER

~ @l~
OFF

ON-LINE OPERATIONS

, I

(8)
(9)

5-2.10 TRANSMIT AND RECEIVE FROM TAPES TO
LINE SIMULTANEOUSLY,* This function, possible only
on the dual-cassette ASR model, permits transmission of
one recorded tape cassette over the line and recording of
incoming messages on the other tape cassette. To
accomplish this process set up the ASR terminal as follows.

Insert the tape cassette which will record incoming data
into the CASSETTE 2 transport (check that write tabs are
in place on the bottom of the cassette). Then,
(10) Press the CASSETTE 2 REWIND switch
(11) When the END lamp lights, press LOAD/FF.
The READY lamp should light after a few
seconds.
(12) Set RECORD CONTROL to ON
(13) Set TAPE FORMAT to LINE or CONT.
(14) Press the PLAYBACK CONTROL (middle row)
CONT START switch.

On the ASR switch panel lower row, set
(1) KEYBOARD to OFF
(2) PLAYBACK to LINE
(3) RECORD to LINE
(4) PRINTER to OFF
(5) Set the terminal ON-LINE/OFF switch to
ON-LINE.

,
'

Insert the tape cassette to be transmitted in cassette 1
transport. Then,
(6) Set the RECORD CONTROL ON/OFF switch
to OFF.
(7) Set CASSETTE 1 to PLAYBACK; CASSETTE
2 will be in RECORD.

I g~~o

r------ CASSETTE 1
REWIND

STOP

- .

PLAYBACK

---J

'~:~~

L-

BLOCK
FWD

CHAR
FWD

The data recorded on CASSETTE 1 will now be
transmitted over the line; CASSETTE 2 will record
incoming data from the line.

g,~'"O
CASSETTE 2

LOAD/FF

STOP

RECORD CONTROL

PLAYBACK CONTROL
CONT
START

RECORD

Press the CASSETTE 1 REWIND switch
When the END lamp lights, press LOAD/FF.
The READY lamp should light after a few
seconds.

CHARACTER

o
ERROR

C
•••••• ··)

T~===

OFF

5
KEYBOARD

PLAYBACK

RECORD

PRINTER

*Possible only if data terminal is in FULL DUPLEX.

5-21

POWER

~~~
OFF

SIMULTANEOUS LINE/LOCAL
(9)

5-3.1 KEYBOARD TO LINE, MAKE PRINTOUT FROM
LINE, AND DUPLICATE A TAPE SIMULTANEOUSLY.
NOTE
This technique is possible only on
dual-cassette ASR Data Terminals.

Insert the copy tape cassette into the CASSETTE 2
transport (check that the write tabs are in place on the
bottom of the cassette). Then,
(10) Press the CASSETTE 2 REWIND switch
(11) When the END lamp lights, press LOAD/FF.
The READY lamp should light after a few
seconds.
(12) Set the RECORD CONTROL ON/OFF switch
to ON. The ON lamp should light.
(13) Set the TAPE FORMAT switch to the tape
format desired for the copy tape (LINE or
CONTinuous).
(14) Press the CONT START switch to begin tape
duplication. Data will be transmitted from
CASSETTE 1 to CASSETTE 2 (original tape to
copy tape) until the END lamps light.

This technique permits tape duplication while keyboard
send/receive operations are underway. To duplicate a tape
while transmitting data from the keyboard to the line and
simultaneously printing out data recerved from the line,
proceed as follows,
On the ASR switch panel lower row, set

(1)
(2)
(3)
(4)
(5)

KEYBOARD to LINE
PLAYBACK to LOCAL
RECORD to LOCAL
PRINTERtoLINE
Set the terminal ON-LINE/OFF switch to
ON-LINE.

Proceed with keyboard transmission over the line. (No
printout will occur in HALF DUPLEX.) Data received from
the line will be printed out by the terminal.

Insert the tape cassette to be duplicated (original tape) into
the CASSETTE 1 transport. Then,
(6) Set RECORD CONTROL to OFF
(7) Set CASSETTE 1 to PLAYBACK. CASSETTE 2
will be in RECORD.
(8) Press the CASSETTE 1 REWIND switch

II g~~~~" -. '~::~: g.~""

,--_ _ _ _ CASSETTE 1

STOP

PLAYBACK

BLOCK
FWD

II
STOP

REV

CHAR
FWD

--I

L-

RECORD

........

LOAD/FF

STOP

RECORD CONTROL

o
ON

CHARACTER

(

)

fI
rI

-11

ERROR

PLAYBACK

OFF

5
KEYBOARD

-I I

II
I1
rI
lt

CASSETTE 2

PLAYBACK CONTROL
CONT
START

When the END lamp lights, press LOAD/FF.
The READY lamp should light after a few
seconds.

RECORD

PRINTER

5-22

POWER

&(j)~
OFF

{I
[I
II

SIMULTANEOUS LINE/LOCAL
(9)

.--~3.2 PLAY BACK TAPE TO THE LINE AND RECORD
~N TAPE FROM THE KEYBOARD SIMULTANEOUSLY.
NOTE
This technique is possible only on
dual-cassette ASR Data Terminals.

When the END lamp lights, press LOAD/FF .
The READY lamp should light after a few
seconds.

Insert a tape cassette into the CASSETTE 2 transport to
record the terminal keyboard data. Then,
(10) Press the CASSETTE 2 REWIND switch
(11) When the END lamp lights, press the LOAD/FF
switch. The READY lamp should light in a few
seconds.
(12) Set the RECORD CONTROL ON/OFF switch
to ON. The ON lamp should light.
(13) Set the TAPE FORMAT switch to the format
desired for the keyboard copy tape. LINE
format will terminate a block when carriage
RETURN is pressed. CONTinuous tape format
will record up to 86 characters per block and
increase tape cassette storage capacity.
(14) Press the CONT START switch (PLAYBACK
CONTROL in middle row) to commence
transmission of the recorded tape over the line.

';-:he ASR Data Terminal will transmit one recorded tape
flSsette over the line while data from the keyboard is
- ;ecorded on the other tape cassette. To accomplish this
,,;~chnique, proceed as follows.
In the ASR switch panel lower row, set
(1) KEYBOARD to LOCAL
(2) PLAYBACK to LINE
(3) RECORD to LOCAL
(4) PRINTER to LOCAL
(5) Set the terminal ON-LINE/OFF switch to
ON-LINE.
Insert the recorded tape cassette to be sent over the line
nto the CASSETTE 1 transport. Then,
(6) Set RECORD CONTROL to OFF
(7) Set CASSETTE 1 to PLAYBACK
(8) Press the CASSETTE 1 REWIND switch.

",- -1

You may now also begin typing data on the keyboard for
recording on CASSETTE 2. The CASSETTE 1 END lamp
will light when the entire cassette (one side) is transmitted
over the line.

CASSETTE 2

CASSETTE 1
REWIND

LOAD/FF

II
II
STOP

STOP

RECORD

READY

READY
END

END

PLAYBACK

STOP

BLOCK
FWD

CHAR
FWD

RECORD

<0
<0
0
<0

REWIND

LOAD/FF

STOP

RECORD CONTROL

PLAYBACK CONTROL

CONT
START

PLAYBACK

CHARACTER

c••••••••)

<0
ON

ERROR

REV

LINE

OFF

cQ)

LOCAL
KEYBOARD

ON
LINE

PLAYBACK

RECORD

PRINTER

5-23

OFF

POWER

--,

SECTION VI
--I

CARE AND CLEANING
6-1 GENERAL.

This section outlines routine cleaning procedures which will
promote trouble-free operation and maximum performance
of 733 ASR/KSR data terminals. These simple procedures
can be implemented by operating personnel.

Switch off power to the terminal and remove
the thermal paper from the paper drive roller
and paper chute.

Gently clean the printhead carriage rod (Figure
6-1) with a clean soft rag to remove
accumulated paper residue. Slide the printhead
to the left and right as necessary.

Reload the paper and switch on power.

6-2 CLEANING.
Model 733 ASR/KSR data terminals are designed to give
months of trouble-free service under rigorous operating
conditions. To ensure highest performance levels, the
following minimal cleaning procedures should be performed
at regular intervals. These consist primarily of keeping the
thermal printer mechanism and cassette transports clean
and free of foreign matter.
6-2.1 PAPER DRIVE ROLLER CLEANING. To maintain
uniform line spacing, clean the paper drive roller every 3
months or when line spacing becomes uneven or too close.
This is accomplished as follows:
a.

Switch off power to the data terminal.

Remove the thermal paper supply roll from the
printer, leaving the paper drive pinch roller up
(Figure 6-1).

Move the printhead to the far right side.

Wipe the left side of the paper drive roller with
a soft rag or paper towel moistened with
alcohol. Rotate the drive roller manually and
ensure that the entire roller is cleaned.

6-2.3 CASSETTE TRANSPORT CLEANING. Follow the
manufacturers' recommendations for proper handling and
storage of magnetic tape. In addition, clean the tape
read/write heads, capstans, and pinch rollers at regular
intervals. To enhance the cassette system data reliability
(minimize data error rate), this cleaning should be done
once each day, or after 8 hours of operation.
a.

Remove the tape cassettes from the transports
and lift the terminal cover to its stops.

Use a clean cotton swab (or lint-free cloth)
saturated with denatured alcohol to clean the
heads, forward and reverse capstans, and
associated pinch rollers shown in Figure 6-2.

6-2.4 PRINTHEAD CLEANING. To ensure that the
thermal printer continues to print legibly, the printhead
should be cleaned periodically, as follows:
a.

Raise the terminal
window/pinch roller.

Insert a sheet of good quality bond paper under
the window/pinch roller and between the
print head and the thermal paper. Make certain
the bottom edge of the bond paper extends at
least 3/4 inch below the top of the printhead.

Lower the window/pinch roller and type five
lines on the bond paper.

Slide the printhead to the far left and clean the
right side of the drive roller.
Reload the supply roll into the printer and
switch on power.

6-2.2 PRINTHEAD DRIVE MECHANISM CLEANING. To
ensure continued smooth and quiet operation of the printer
mechanism, clean the printhead carriage assembly every 3
months or whenever the carriage rod appears dirty. Failure
to do this can result in increased audible noise and can
reduce the lifetime of the printer mechanism. Clean the
assembly as follows:

and

lift

the

NOTE
The printhead will not print a visible
image on the bond paper.
d.

6-1

cover

Remove the bond paper and lower the terminal
cover.

POWER ASSEMBLY
(COVER REMOVED)
TERMINAL
BLOCK TB 1

3 FUSES (F2,F3,F4)

F---'"

UPPER UNIT
MOUNTING
SCREWS

r: _.-

FIGURE 6-1. MODEL 733 DATA TERMINAL INTERNAL ASSEMBLIES (CARD RACK COVER REMOVED)
6-2

--.".

CAPSTAN & PINCH ROLLERS

FIGURE 6-2. TAPE TRANSPORT CLEANING AREAS

This cleaning procedure should be repeated each time a new
roll of paper is loaded into the printer or whenever the
image starts to fade as a result of residue buildup on the
printhead.

6-3 ACCESS TO PC CARDS.

Loosen the screw in each corner of the PC card
rack cover (top center of the upper unit); slide
the cover toward the keyboard and lift off over
the four screws.

6-3.2 KSR LOWER UNIT PC CARD ACCESS.

PC cards are located in both the ASR (upper unit) and the
KSR (lower unit). Occasionally check that the PC cards are
securely plugged into their connectors, particularly after
shipping or moving the terminal.

Raise the terminal cover and loosen the two PC .
card rack cover screws (see Figure 6-1).

Lift the card rack cover back and off.

To gain access to the power assembly, terminal
board, and fuses, remove two retaining screws
and lock washers and lift off the power
assembly cover.

Consult the ASR/KSR Maintenance
Manual before removing or replacing PC
cards. Several cards require special
instructions to remove (e.g., the Display
PC card and the Code PC card).
DISCONNECT POWER TO THE
TERMINAL BEFORE PROCEEDING.

Replace all covers before applying power
to the terminal.

6-3.1 ASR UPPER UNIT ACCESS.

d.
a.

Loosen the two screws at the rear of the upper
unit (see Figure 2-4) about 1/2 turn and slide
the upper unit cover toward the keyboard.

6-3

To replace the card rack cover, engage the three
tongues, along the back of the cover, with the
three slots; then fold down the cover as if on a
hinge.

envelope contammg four screws should be
taped inside the terminal base (two 4-40 X 3/8
and two 4-40 X 5/8 screws). Remove the
envelope and the screws.

64 INSTALLING AND REMOVING THE ASR
UPPER UNIT.
For maximum protection in transit, the ASR is shipped in
two separate units: the KSR lower unit and the ASR
display and control upper unit. These units must be joined
and checked before operating.

6-4.1 INSTALLING THE UPPER UNIT.
a.

Remove the KSR (lower unit) from its shipping
container and place it on the accessory Silent
700 Terminal Stand or other flat surface.
(Leave the terminal cover closed.)

Remove the ASR upper unit from its shipping
carton and carefully place it, display panel
down, on a flat surface.

Facing the bottom of the upper unit, loosen the
four 10-32 screws about 4-1/2 turns (these are
the screws with the largest heads). The four
screws should protrude 1/8 to 3/16 inch.

Note the two keyhole slots in both pedestals at
the top rear of the KSR (lower) unit. pick up
the ASR upper unit and place it on the two
pedestals so that the heads of the four screws
loosened in step c. enter the large portion of
the slots. Make sure the upper unit controls
face the keyboard.
Check that the base of the upper unit is resting
squarely on the pedestals. Now slide the upper
unit to the rear so the screws locate at the
narrow part of the keyhole slots.

Check that the cable is dressed to the left
(viewed from the rear), close to the unit, and in
a "C" shaped configuration (refer to Figure
2-4).

Plug the connector marked P3 onto the
innermost PC card tab protruding through the
slot in the black housing at the bottom of the
KSR lower unit. The key slot must be up to
mate with the key in the connector housing.
Insert as far as possible. Secure this connector
with the two 10l).ger screws (4-40 X 5/8)
through the holes in the connector ears.

Plug the small white connector (P13) on the
cable extending from the upper unit fan into
the connector next to the fuse and power cord
outlet on the KSR unit. It is keyed and may be
inserted only one way.

The unit is now assembled and ready for initial
checkout described in Section II of this manual.

6-4.2 REMOVING THE UPPER UNIT. Sometimes (for
shipping purposes, etc.) it is necessary to remove the upper
unit of the 733 ASR terminal. To remove it, do the
following:

Before proceeding, check that the upper
unit is in proper position by trying to lift
it from the KSR unit. It will not lift from
the lower unit if properly located.

Plug the ASR connector marked P1 onto the
PC card tab at the lower left side of the upper
unit through the opening in the rear of the unit.
The key slot must be up to mate with the tab
on the cover. Be sure the connector is inserted
as far as the cover will allow. Secure the
connector with the two shorter screws (4-40 X
3/8) through the holes in the connector ears.

Slowly raise the KSR cover to its uppermost
position. The four upper unit mounting screws
are now accessible through the four rectangular
shaped holes in the metal support plate (see
Figure 6-1). Tighten the four mounting screws
securely. Lower the cover.
Remove the ASR/KSR interconnecting cable
(959371-1) from the shipping box. A paper

6-4

Disconnect the fan wire (P13) and the
ASR/KSR cable (PI/P3) shown in Figure 2-4.

Lift the terminal cover. With a screwdriver
loosen about 4-1/2 turns (do not remove) the
four screws in the recessed area of the two
pedestals on which the ASR switch panel rests
(see Figure 6 1).

Close the cover gently. Pull the upper switch
panel forward, then lift it off.

6-5 TERMINAL MALFUNCTION CHECKLIST.

If the terminal has been in cold storage, allow
sufficient time for warmup to operating
temperature.

If the terminal fails to operate properly, perform the
following checks before calling service personnel for
assistance.
a.

Check all ac power connections.

Check settings of all operator controls.

Check that the POWER switch is ON (Figure
3-1).

Check that the tape cassettes are in place and
that both transport doors are closed.

Ensure that a fuse is not blown (Figures 2-4 and
6-1).

Check that a tape to be recorded on has the
appropriate write tab in place (Section IV).

Review control interlock status (Section IV).

Ensure that all PC cards are securely plugged in
(see paragraph 6-3).

Check that all options are correctly installed.

Check the transmission SPEED switch for
proper setting (Figure 3-1).

Check that the external connectors are plugged
in and tightened (Figure 2-4).

Check that the thermal print paper roll is
loaded properly (Figure 2-2).

6-5

APPENDIX A
MODEL 733 EQUIPMENT SPECIFICATIONS

[

APPENDIX A
MODEL 733 EQUIPMENT SPECIFICATIONS

A-I TRANSMISSION CODE AND CHARACTER
SET.

A-6 POWER REQUIREMENTS.

The transmission code is USASCII, seven-level, 11 bits per
character; this includes 7 data bits, a parity bit, a start bit,
and 2 stop bits at 10 characters per second speed. Only 1
stop bit is used at higher speeds, resulting in 10 bits per
character (see Figure A-I). The KSR has 95 printable
characters, plus four printer control characters and one
terminal control character. The 733 ASR terminal
recognizes four additional terminal control characters:
DC-1 through DC-4 which are optional (see Appendix B,
paragraph B-4).

a. Frequency

Normal operation with primary
input power frequencies in the
band of 48 to 62 Hz.

b. Voltage

115 (+10%, -15%) volts RMS. It
is possible to field-modify the
terminal to operate on 230
(+10%, -15%) volts RMS.

c. Power

Required primary input power
at maximum rated voltage is 200
VA maximum.

A-2 DATA FORMAT AND 1RANSMISSION.
Data is routed within the terminal via a single data bus. The
data is sent serial by bit, 8 bits per character. The 8 bits
include a 7 bit ASCII character code plus an eighth bit
which is used as an end-of-block indicator in the ASR unit.
Transmission speed is switch selectable by the operator to
10 characters per second (110 Baud), 15 characters per
second (150 Baud), or 30 characters per second (300
Baud). An ON-LINE switch located on the power switch
panel controls the status of the entire terminal.

A-7 TAPE TRANSPORT.
See Table A-2.

A-8 RECORD.
Data can be recorded on the RECORD transport (selected
by operator) from the keyboard, line interface, or
PLAYBACK transport. The recording method is phase
encoding at 800 bits per inch (1600 flux reversals per inch).
single-track (a second track in the cassette is also available
for recording by turning the cassette over).

A-3 PRINTER.
A-9 PLAYBACK.

See Table A-I.

Data can be retrieved from the playback transport and
transmitted to the printer, line interface,and/or record
transport. Record and playback to the communication line
are performed at a maximum rate of 10, 15, or 30
characters per second, as selected on the terminal SPEED
selection switch. When transferring data from a transport to
the page printer or line interface, playback is inhibited for
200 milliseconds following the carriage return character in
the line tape format (carriage return character time is
included in the 200 milliseconds), or at the end of each
block in either format. High-speed playback is performed at
a maximum rate of 250 characters per second when the
playback is in local mode. If a printout is desired
simultaneously with playback. however. the maximum
speed is 30 characters per second.

A-4 COMMUNICATION LINE INTERFACE.
The standard line interface conforms to EIA Standard
RS232C. The terminal can receive, without error, signals
with mark and space distortion of up to 45 percent. The
minimum stop bit time for error-free reception at any speed
is 0.6 of a normal bit time. The signals and connector pins
involved are described in Table 2-1.

A-S PHYSICAL.
a. Terminal Dimensions

See Figure A-2.

b. Terminal Weight

38 pounds KSR, 55 pounds
ASR, exclusive of all options.

A-I

r-~--T--r-~--T--r-~--

MARKING--...

I
I

SPACING

BIT TIME

1
I

I
I

I
I
'--_.....I _ _ .L __ L._-I __ .l. __ L_.....J--..L-9.09
msec

START
BIT

I
I

_ _I_ _ .JI

DATA BITS

PARITY
BIT

STOP
BIT

CHARACTER TIME @ 10 CPS (11 BITS)
100 msec

(a) 10 CPS TIMING

MARKING-- -

-r --1- -1- - r- -1- -

BITTIME
(SEE TABLE
BELOW)

r·--r-

I
1
1
I
1
I
","----:.1 __ L __ I__ 1 __ ~ __ I__ J __ .1 __
1
1

SPACING

,--

1
I

1
1

I
I

L
START
BIT

I
1
_.J

DATA BITS

PARITY
BIT

STOP
BIT

~'------CHARACTERTIME @ 15& 30 CPS (10 BITS) - - - - - - - W I...

(SEE TABLE BELOW)
15 CPS

30 CPS

BIT TIME (msec)

6.67

3.33

CHARACTER TIME (msec)

66.7

33.3

(b) 15 AND 30 CPS TIMING
NOTE: CPS = CHARACTERS PER SECOND

FIGURE A-I. SERIAL DATA TIMING

A-2

TABLE A-l. PRINTER SPECIFICATIONS

Specification

Value

Printing Method

5 X 7 dot matrix, electronically heated, on heat-sensitive paper

Line Length

7.9 inches, 80 characters

Character Spacing

0.1 inch, character center to center

Line Spacing

Six or three lines per inch (single or double spaced)

Paper (TI Part Number 213714-0001
or 953167-0001)

Roll, 8.5 inches wide by 3.625 inches maximum diameter (300
feet), heat-sensitive

platen

Friction feed

Carriage Return Time

195 milliseconds maximum

Line Feed Time

33 milliseconds maximum (single space), 66 milliseconds
maximum (double space)

Audible Alarm Time

250 (±50) milliseconds on receipt of the BEL character

Printable Characters

Carriage Return and Line Feed (CR/LF)

Automatic at column 81, no code is transmitted

Visibility of Printed Lines

At least 50 previous lines of print (including line and
character being printed) are visible

Print Contrast

Operator adjustable (paragraph 2-4)

TABLE A-2. TAPE TRANSPORT SPECIFICATIONS

Specification

Value

Recording Speed

8 inches per second

Rewind Time

60 seconds maximum

Tape Drive

Capstan drive for recording or playing back

Error Rate

One in 10 6 maximum, using certified cassette tapes and proper head-cleaning procedures; one in
10 7 typical

Inter.changeability

Any tape recorded on any 733 ASR transport operating within specifications may be read on any
other 733 ASR transport of the same model operating within specifications

Sensors

EOT, BOT, cassette-in-place, write tab, transport-door-closed

A-3

A-l0 HIGH-SPEED DUPLICATION.
Recording on the record cassette from the playback
cassette can be accomplished at a maximum rate of 250
characters per second when both are operated in the local
mode. If a printout is desired simultaneously with
duplication, the speed is limited to 30 characters per
second. Manual changes (deletion, addition, or substitution
of whole line) can also be merged into the tape being
recorded.

A-ll CASSETTE TAPE.
The storage medium is a cassette tape comparable to the
improved Philips cassette, containing 275 to 300 feet of

digital-grade magnetic tape with approximately 20 inches of
nonmagnetic transparent leader joined to each end. The
magnetic tape has a beginning-of-tape and an end-of-tape
marker (BOT and EOT), consisting' of a hole in the tape.
The magnetic and physical characteristics of the tape,
leader, and markers are compatible with existing or
proposed EeMA, BEMA, and ANSI standards. Storage
capacity of the cassette is approximately six blocks per
foot, or 1800 blocks per 300-foot cassette. Assuming 50
percent page-use efficiency, or an average of 43 characters
per block (86 is maximum), typical storage capacity is
77,500 characters per track (side). Maximum tape capacity
using both tape sides is 310,000characters.

NOTE: ALL DIMENSIONS IN INCHES.

14.62

FIGURE A-2. DIMENSIONS (KSR/ASR)

A-4

APPENDIXB
MODEL 733 OPTIONS

TABLE OF CONTENTS

Section
B-1
B-2
B-3
B-3.1
B-3.2
B-3.3
B-4
B-5
B-6
B-6.1
B-6.2
B-6.3
B-7
B-8
B-8.1
B-8.2
B-9
B-9.1
B-9.2
B-9.3
B-9,4
B-9.5
B-10
B-10.1
B-10.2
B-10.3
B-10.4

B-ll
B-12
B-13

Page
Uppercase and Lowercase Keyboard .... B-1
Answer-Back Memory . . . . . . . . . . . . . B-1
Current Loop Line Interfaces . . . . . . . . . B-1
Neutral . . . . . . . . . . . . . . . . . . . . . . . B-1
Polar . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Modem Line Interface . . . . . . . . . . . . . B-1
Auto Device Control (ASR
Model Only) . . . . . . . . . . . . . . . . . . B-1
Single-Cassette System . . . . . . . . . . . . . B-4
Strappable Options . . . . . . . . . . . . . . . B-4
End-of-Line Alarm . . . . . . . . . . . . . . . . B-4
Playback Stop on Error . . . . . . . . . . . . B-4
Strappable ETX Character to
Initiate Recording . . . . . . . . . . . . . . B-6
Auto Answer Control (300 Baud) ...... B-6
Automatic Search Control . . . . . . . . . . . B-8
Local ASC Operation . . . . . . . . . . . . . . B-8
Remote ASC Opera~ion . . . . . . . . . . . B-10
Remote Device Control . . . . . . . . . . . B-12
Remote Device Control Commands .... B-12
Local Operation . . . . . . . . . . . . . . . . B-14
Initial Setup . . . . . . . . . . . . . . . . . . . B-15
RDC Status Characters . . . . . . . • . . . . B-15
Error Detect . . . . . . . . . . . . . . . . . . . B-17
1200 Baud Interface . . . . . . . . . . . . . B-19
1200 Baud Operation . . . . . . . . . . . . . B-19
Continuous Versus Line Format ...... B-20
Low Speed Operation . . . . . . . . . . . . . B-20
Printing in 1200 Baud Mode . . . . . . . . B-20
Model 733 ASR Footpedal
. B-21
Acoustic Coupler . . . . .
. B-21
. B-24
Binary Data Format (Dual Format)

APPENDIX B
MODEL 733 OPTIONS

B-1 UPPERCASE
BOARD.

AND

LOWERCASE

KEY-

An optional full ASCII keyboard replaces the standard
ASCII keyboard. The full ASCII keyboard arrangement is
shown in Figure B-1.1, and Figures B-1.2 through B-1.4
show the characters generated in the various shift and
control modes. It includes an UPPERCASE-only key. When
depressed, this key causes unshifted alphabetic characters
to generate uppercase codes.

B-2 ANSWER-BACK MEMORY.
The Answer-Back Memory option provides up to 21
characters, which are field-programmable and nonvolatile.
It is activated by receiving the USASCII ENQ character or
by depressing the HERE IS key on the keyboard when the
terminal is on-line and the KEYBOARD
LINE/OFF/LOCAL ,switch is not OFF (ASR only). The
contents of the memory are not recorded or printed except
when transmitting in half duplex and the printer and
recorder inhibit switches on the Answer-Back card are
open. Other Answer-Back Memory options include
inhibiting of the auxiliary-1 (AUX1) during transmission of
the memory contents, and disabling actuation of the
Answer-Back Memory by the ENQ character. For
information on all answer-back options and for instructions
on programming the memory, see the Model 732/733
Maintenance Manual (TI Part No. 960129).

requirements of the Bell System Data Access Arrangement,
and it operates asynchronously up to a maximum speed of
300 baud in full or half duplex over a two-wire voice-grade
line. Signaling is accomplished by means of frequency shift
keying (FSK). Both originate mode and answer mode units
are available.

B-4 AUTO DEVICE CONTROL (ASR MODEL
ONLY).
The Automatic Device Control (ADC) option (TI Part No.
971481) accommodates control characters DC1, DC2, DC3,
DC4, and EOT. An earlier version of the ADC (TI Part No.
960891) accommodates control characters DC1, DC2, DC3,
and DC4 only. When the DC1, DC2, DC3, or DC4 are
received from the communication line or generated by the
terminal keyboard, the record and playback tape transports
respond as follows:

B-3 CURRENT LOOP LINE INTERFACES.

Full ASCII
Keyboard

Standard ASCII
Keyboard

DC1
DC2
DC3
DC4
*EOT

(X-ON)
(TAPE)
(X-OFF)
(~)

Action
Playback ON
Record ON
Playback OFF
Record OFF
Disconnect

When the playback transport reads a DC3 (playback OFF)
character, the next character after the DC3 is read and
transmitted before the playback transport is stopped
(unless the DC3 character is the last character within the
block, in which case the transport stops reading and
transmitting immediately after the DC3 character). These

B-3.1 NEUTRAL. This optional interface replaces the
standard EIA interface. Signaling is accomplished by
opening and closing the circuit presented to the terminal
I/O connector. Nominal operating current is field selectable
to either 60 mA or 20 mAo

functions are described in Section B-9.

B-3.2 POLAR. The optional polar interface replaces the
standard EIA interface. Signaling is accomplished by
alternately opening one circuit and closing the other circuit
presented to the terminal I/O connector. A positive current
in the external circuit represents a "mark" and a negative
current represents a "space." Nominal operating current is
either 60 mA or 20 mAo

On terminals equipped with the Auto Device Control
option, consult Section B-9.1 for recording precautions
concerning data terminals which do not have the ETX
option (Section B-6.3) implemented.

*The EOT function is operable on terminals equipped with
both the Auto Answer Control option (TI Part No.
%0885) and the latest version of the ADC option (TI Part
No. 971481).

B-3.3 MODEM LINE INTERFACE. This optional interface
replaces the standard EIA interface. It conforms to the

B-1

LEGEND:
Control Character
Alphabetic character (SH IFT for uppercase)
Shifted character
Unshifted character
Shifted character, control character
Graph ic unsh ifted

FIGURE B-1.1. OPTIONAL FULL ASCII KEYBOARD LAYOUT AND SYMBOLIZATION

The above codes are generated when the labeled key is depressed but
neither the SH I FT nor the CTR L key is depressed.
NOTES:

* Not a code-generating key.
** If UPPERCASE is depressed, only uppercase codes are generated;
otherwise, lowercase alphabetic codes are generated. (Press again to release.)

FIGURE B-1.2. LOWERCASE CHARACTERS, OPTIONAL FULL ASCII KEYBOARD

B-2

PAPER
ADVANCE

The above codes are generated when the SHI FT key and the labeled key
are depressed. UPPERCASE key has no effect.
NOTES:

*Not a code-generating key.
A blank key indicates strobe inhibit. Depressing SHIFT and CTRL
together inhibits strobe.

FIGURE B-lo3. SHIFTED CHARACTERS, OPTIONAL FULL ASCII KEYBOARD

The above codes are generated when the CTRL key and the labeled key
are depressed. UPPE RCASE and SH I FT keys have no effect.
NOTES:

* Not a code-generating key.

A blank indicates strobe inhibit. Depressing SHIFT and CTRL keys
together inhibits strobe.

FIGURE B-1A. CONTROL CHARACTERS, OPTIONAL FULL ASCII KEYBOARD

B-3

On single-cassette ASR. models, the tape may be' only
recorded or played back, depending upon the mode
selected before leaving the terminal unattended.

NOTE
In local operation all keyboard data is
ignored while the playback transport is
ON. This means the DC3 control
character cannot be generated from the
keyboard to switch OFF the playback
transport. The playback cassette will be
stopped either by pressing the playback
control (CONT) STOP or by reading a
DC3 character on tape.

It is recommended that the cassette being read (played
back) be made a read only tape by removing the write tab
for that side (see paragraph 4-4.1).

The terminal may be programmed to respond to the control
character EOT only if the Automatic Answer Control
option is installed in the data terminal. Upon receipt of the
EOT control character, the terminal will be disconnected
from .the communications line.

An ADC ON/OFF switch (on the new version only),
accessible through the lower unit card cage cover, permits
disabling of all functions (except EOT decode, for auto
disconnect with Auto Answer Control option, Part No.
960885). This feature is particularly useful when recording

For further information on the Automatic Device Control
option, refer to the Silent 700 Models 732/733
Maintenance Manual (TI Manual No. 960129-9701).

tapes in which the DC1, DC2, DC3, and DC4 characters are
to be recorded (i.e. format tapes, tape duplication).

B-S SINGLE-CASSETTE SYSTEM.

It is possible for the Automatic Device Control to ignore or
respond to the DCl, DC2, DC3, and DC4 characters coming
from received, transmitted, or local data. These options are
implemented by pencil switches on the new ADC PC card
(971481) or by strappable resistors on the older version
(960891). To implement these enabling options, see Table
B-4.1 (new version) or Table B-4.2 (earlier version) as
appropriate.

The Model 733 ASR is available without the cassette-2
transport and its associated controls. This single-cassette
system has the same controls, indicators, and capabilities as
a dual-cassette system except for the following:

The Automatic Device Control is valuable for recording or
playing back tapes from an unattended data terminal.
Unattended operation is possible on terminals equipped
with the Automatic Answer Control option. Before leaving
the terminal unattended, set up the terminal as follows:
a.

REWIND and LOAD the cassette to be
recorded (must have write tab installed).

REWIND and LOAD the cassette to be played
back.

Select the desired TAPE FORMAT (CONT or
LINE).

On the ASR lower
recommended settings are:
(1)
(2)
(3)
(4)

switch

row

Simultaneous playback and. record operations
cannot be performed.

Tapes cannot be duplicated.

Some editing functions are inhibited.

B-6 STRAPPABLE OPTIONS.
Several operating options may be implemented by adding,
removing, or changing certain resistors on the appropriate
PC cards as noted below. The PC cards may be removed for
service as described in Section 6-3 of this manual.

B-6.1 END-OF-LINE ALARM. The end-of-line alarm may
be inhibited from sounding automatically at column 72 by
removing resistor R20 (10 ohms) from between Jl and J2
on the Printer Control PC card (red-tabbed card in'slot A2
of the KSR PC card rack). This resistor is easily pulled out
or inserted in its connector by hand. This will not inhibit
the alarm from sounding upon receipt of the ASCII 'BEL'
character. The card rack cover is shown in Figure 3-1.

the

KEYBOARD to OFF
PLAYBACK to LINE
RECORD to LINE
PRINTER to LINE or OFF as desired.

B-6.2 PLAYBACK STOP ON ERROR. Upon detecting a
read error when reading from the tape, the Playback
Controller option will automatically stop if resistor Rl (10
ohms) is connected between J3 and J4 on the Playback
Control PC card (Slot 4 in the upper ASR unit). If R1 is

Set the terminal ON LINE/OFF switch to ON
LINE.

B-4

continue reading tape (if in continuous playback mode).
This resistor is easily pulled out of J 3/J 4 and inserted in
]1/J2, or vice versa, by hand (no tools necessary)

connected between J1 and J2 on this same card, the
controller will not stop upon detecting a read error; instead,
it will transmit the erroneous block to the terminal and

TABLE B-4.1. AUTO DEVICE CONTROLLER ENABLING OPTIONS
(for Part No. 971481)

Enabling Switch Section
Control Function

De1,DC3
(Playback ON/OFF)

To Enable
When
Transmitting

To Enable
When
Receiving

To Enable
When in
Local

S2-1

S2-2

S2-3

S2-4

S2-5

(DC3 only)
DC2,DC4
(Record ON/OFF)

NOTE
Control characters DC1 through DC4 function in the selected operating modes shown above. Close the appropriate switch
section on S2 to enable the corresponding function. When the ADC ON/OFF switch is in the OFF position, all ADC
functions are disabled except the automatic disconnect on receipt of the EOT character (if the Auto Answer Option is
installed) .
TABLE B-4.2. AUTO DEVICE CONTROLLER (EARLIER MODEL) ENABLING OPTIONS
(Part No. 960891)

To Enable
When
Transmitting

To Enable
When
Receiving

To Enable
In
Local

DCl (Playback ON)
Resistor Between

R1
J1-J2

R2
J3-J4

R3
J5-]6

DC2 (RecQrd ON)
Resistor Between

R7
J13-J14

R8
J15-J16

R9
J17-J18

R4
]7-J8

R5
J9-J10

R6
J11-J12

R10
J19-J20

R11
J21-J22

R12
J23-J24

Control Function

DC3 (Playback OFF)
Resistor Between

DC4 (Record OFF)
Resistor Between

NOTE: All resistors are 10 ohm, 0.25 watt, 5 %.

B-5

B-6.3 STRAPPABLE ETX CHARACTER TO INITIATE
RECORDING. The optional Dual-Format Record Buffer
PC card (962285-0001) may be strapped to permit use of
the ASCII ETX control character to initiate tape recording
of the contents of the record buffer when the TAPE
FORMAT switch is set to CONT. The ETX control
character then serves to initiate recording in CONT format
the same as the carriage RETURN code does in LINE
format.
(3)

When transmitting on-line in the CONTinuous tape format,
it is important to send the ETX character last in the data
stream, just before the DC4 character, to ensure that all
transmitted data will be recorded on· tape.

B-7 AUTO ANSWER CONTROL (300 BAUD).
The Auto Answer Control option (TI Part No. 960984)
permits a 300 baud terminal to automatically answer a call
through the Bell System DDD network. Two versions of
this option provide interface to either a Bell CBS Data
Access Arrangement (or equivalent) with the Answer Mode
Modem option or a Bell103A Data Set (or equivalent) with
Auto Answer Control. The two versions require different
interface cables. This option offers the following features:

A continuous space of at least 1.28
seconds without a mark is received from
the originating station.

Indicator lamps on the keyboard option panel
display the following:

LINE-READY: illuminates when the terminal
has answered the call, received the carrier from

TABLE B-7.1. ANSWER-BACK MEMORY
TRIGGER DELAY ADJUSTMENTS

*(1) Automatic triggering of the Answer-Back
Memory (if installed) when the call is answered.
The Answer-Back Memory is triggered after a
standard delay of 1.28 seconds from the carrier
detect, but the delay can be adjusted by
installing a 10-ohm resistor jumper between the
points listed in Table B-7.1.
The terminal is automatically disconnected
from the line, and the data line is blinded from
receiving or transmitting any further data if any
of the following conditions occur.

(b)

(d)

TERMINAL READY: illuminates when the
terminal ON-LINE/OFF switch is set to
ON-LINE, indicating that the terminal will
answer an incoming call.

Data Format Option.

(a)

The disconnect character (usually EOT) is
received from the originatifig station [if a
Remote Device Control or an Automatic
Device Control (971481) option is
installed 1.

RING INDICATOR: blinks 2 seconds on and 4
seconds off with the ringing indicator of the
103A or DAA (or equivalent). The indicator
glows steadily after the call is answered until
the carrier is received from the originating
station.

The ETX option may be enabled by removing R8 (10
ohms) between J3 and J4 on the Dual Format Record
Buffer PC card (position XA-5, upper unit) and reinstalling
R8 as R13 between J1 and J2. No tools are required to
move R8.·
NOTE
The ETX option cannot be used with the Binary

(2)

(c)

A carrier from the originating station is
not received within 10 seconds after a call
is answered.

Delay

Install 1
Resistor

Between

10.24 sec
5.12 sec
2.56 sec
1.28 sec
640 msec
320 msec
160 msec
80 msec
0.6-1.9 msec

R15
R16
R17
R18 2
R19
R20
R21
R22
R23

J10 & J16
J9 & J14
J8 &J1
J7 & J15
J6 & J17
J5 & J15
J4 & J14
J3& J1
J2 & J16

NOTES:
1 Only

The carrier from the originating station is
lost for at least 50 msec during a call.

one 10-ohm resistor is installed.

R18 is standard setting for trigger delay.

*Requires either an RDC (971483 M/L, 973901 M/W) PC card or an ADC (971481) PC card.

B-6

or 103 series is selectable by removing or installing the
following resistor on the Auto Answer Control PC card:

the originating station, and is ready to transmit
or receive.
The interface signals for both versions of the Auto Answer
Control option are compatible with EIA Standard RS232C.
The interface cable pin assignments and functions are listed
in Tables B-7.2 and B-7.3. Operation with either the DAA

To implement with the DAA
To implement with the 103

Install

Remove

R2
R1

R1
R2

TABLE B-7.2. 300 BAUD AUTO ANSWER CONTROL PIN ASSIGNMENTS AND FUNCTIONS
FOR THE 103A SERIES (OR EQUIVALENT) DATA SETS
(CABLE, TI PART NO. 971555-0001)

Connector Pin Numbers
Data Terminal

Pin Function

Data Set

Protective GNDI
Transmitted Data2
Received Data3
Clear to Send 3
Data Set Ready 3
Signal GND 1
Carrier Detect 3
Data Terminal Ready2
Ring Indicator 3

1
2
3
5
6
7
8
20
22

A
H
10
8
9
7
K

E
D

NOTES
1. Common Signal From both Terminal and Data Set
2. Signal From Terminal
3. Signal From Data Set
TABLE B-7.3. 300 BAUD AUTO ANSWER CONTROL PIN ASSIGNMENTS AND FUNCTIONS
FOR THE CBS-DAA SERIES (OR EQUIVALENT) DATA COUPLERS*
(CABLE, TI PART NO. 971557-0001)

Terminal Pin No.

Wire Color
at Spade Lug

DAA
Terminal
Lugs

Description

7
E
D
5
6
C
3
4

Black
Red
Green
White
Brown
Orange
Yellow
Blue

SG
OH
RI
CCT
DA
DT
DR
SH

Signal Ground
Off Hook
Ring Indicator
Coupler Cut Through
Data Transmission
Data Tip
Data Ring
Switch Hook

*Used only with built-in internal Answer Modem option.

B-7

B-8 AUTOMATIC SEARCH CONTROL.

spaces and punctuation. When the tape
cassettes are recorded, it is useful to give each
me (record) a header which can later be used as
the search ID. Be sure the header is from 1 to
16 printable characters in length and is unique
from all other data on the tape.

The Automatic Search Control (ASC) option provides the
capability to search a cassette tape for previously recorded
data, using from 1 to 16 printable characters as an identity
code. The search rate depends on which of various
configurations and modes is used. The minimum rate* is
250 characters per second (CPS). '
e.

B-S.l LOCAL ASC OPERATION.
B-S.1.l Initiating a Search. To initiate automatic tape
search in local standalone operation, prepare the data
terminal as follows.

Start the search using one of the following
methods:
(1)

(2)

On the ASR switch panel lower row, set
(1)
KEYBOARD to LOCAL
(2) PLAYBACK to LOCAL
(3) *RECORD to OFF
(4) PRINTER to LOCAL.

Insert the cassette to be searched into the
cassette 1 transport, rewind and load, and set
the RECORD/PLAYBACK switch to
PLAYBACK for that cassette.

Press the ESC key and then the $ key. The data
terminal will respond with a line feed and a
carriage return.

Type in the information to be located on the
playback cassette. This information is stored in
a memory on the ASC PC card and must be
from 1 to 16 printable ASCII characters in
length. This information becomes the search
identity (ID); it will be retained in memory
until a new ID is entered or POWER is switched
OFF. If more than 16 printable characters are
entered, the printer is automatically inhibited
and the memory retains only the first 16
printable characters entered.

(3)

Press CaNT START; this causes the
cassette to be searched continuously.
OR
Press BLOCK FWD; this causes the
cassette to be searched one data block
each time the switch is pressed.
OR
Terminals equipped with the Automatic
Device Control (ADC) option or the
Remote Device Control (RDC) option
may use the DCl (X-ON) control
character entered from the keyboard to
start the search. This produces the same
action as pressing CaNT START.
Depending on the intended use of the
data terminal, the ADC or RDC options
may have been set to ignore the DCl
(X-ON) control character in the local
mode of operation (a selectable option).
This precludes starting a search from the
keyboard; the search must be started by
pressing CaNT START.

The printer is inhibited and the DCl through
DC4 functions are ignored while the playback
cassette is being searched. When the desired
data is located on the tape, the terminal
responds with a line feed and a carriage return,
and. the terminal enables the printer and stops
the playback cassette.
f.

Control characters, including carriage return
and line feed, are ignored if entered in the
search ID or in the data on tape. The search ID
must be information known to be recorded on
the cassette tape (e.g., name, part number,
account number, header, trailer, etc.) including

To play back the searched-for data:
(1)

If the search ID selected occurs just
before the desired information, press
CaNT START (or BLK FWD or CHAR
FWD). The search process halts when the
last character of the search ID is located,

*In the local mode the search rate is contingent on the record status; Le., if record is ON-LINE and READY, the search rate
is maximum (326 CPS). For all others (Le., record not ON-LINE and READY) the search rate is a maximum 250 CPS.

B-S

(2)

and in this case the desired information
will be readily available from the tape.

(CASSETTE 1 can be used, but CASSETTE 2 is
described to simplify the explanation.)

If the search ID selected was part of the
desired data, press BLOCK REV several
times (this ensures that most of the data
will be printed, since the data may be
contained in more than one consecutive
block). Then press CONT START,
BLOCK FWD, or CHAR FWD as desired.

(1)

Press CASSETTE 2 REWIND.

(2)

When the END lamp lights, press
LOAD/FF. The READY lamp should
light after a few seconds.

B-S.l.2 Reinitiating a Search. If the desired data is
contained on the playback cassette more than once, it is
not necessary to re-enter the search ID. The search may be
restarted simply by entering the activate code (ESC and $),
and then press CONT START, BLOCK FWD, or CHAR
FWD as desired.
B-S.1.3 Termination of a Search. To terminate a search,
press the BREAK key*. The ASR will respond by causing a
line feed and a carriage return. The cassette in the playback
mode will stop, and the printer will be automatically
activated. The contents of the ASC memory will not be
altered.
B-S.l.4 Tape Editing-and Duplication. The ASC is a very
useful and time-saving aid in editing and duplicating tapes.
Editing is faster with ASC since it is not necessary to stop
the playback and approach the error using BLOCK FWD's
and CHAR FWD's as in the conventional method of editing
tapes (described in Section 5-1.7). Tape duplication at the
full search speed is possible while a search is in progress.
Tape editing is easier if the tape is recorded in LINE tape
format and the duplicate (copy) tape also is recorded in
LINE tape format. If desired, a CONTinuous format tape
can be recorded after editing is complete. This procedure is
described in Section 5-1.5.
To duplicate and edit proceed as follows:
a.

On the ASR switch panel lower row, set all four
switches to LOCAL.

Insert the cassette to be searched into the
cassette 1 transport, rewind and load, and set
the RECORD/PLAYBACK switch to
PLAYBACK for that cassette.

Insert a blank tape cassette (with write tabs in
place) into the CASSETTE 2 transport.

Set the TAPE FORMAT switch to LINE.

Enter the activate code: ESC and $.

Type in the search ID. For editing purposes the
search ID can be the desired text identifier.

Press the RECORD CONTROL/ON switch. The
ON lamp should light.

Press CONT START. CASSETTE 2 will
duplicate CASSETTE 1 while the search is in
progress. The DCl (X-ON) character should not
be used to start the search because the
character will be recorded on the tape.

When the search ID is located on the playback
cassette (CASSETTE 1), the data terminal will
respond with a line feed and a carriage return.

Press the RECORD CONTROL/PRINT switch.
This will cause display and printing of the
contents of the record buffer. The search ID
characters will be the last characters printed.
For example, suppose the search ID was a
misspelled word; therefore, the last word
printed is misspelled. The TAPE (backspace)
key can be pressed as many ~ as necessary
until the printhead moves back just over the
incorrect character. The correct character(s)
can then be typed in. The TAPE (forward
space) key is pressed to retur~ the point
where the printing was stopped. Pressing
BLOCK FWD will put the remainder of that
line in the record buffer and on tape the same
as the carriage return character. If more editing
is necessary, press RECORD CONTROL/OFF.
Repeat the above process, starting with entering
the activate code (step d. above), until editing is
complete. When the last error is corrected,
normal duplication procedures, as described in
section 4-9.1 may be used to complete the
duplication process.

*More than one line feed may result from pressing the BREAK key because of key switch contact bounce; however, no other
operations are affected.

B-9

For another example, suppose the search ID is a
word to be eliminated from the text. The TAPE
(backspace) key is repeatedly pressed untii'the
printhead just covers the first letter of the
word. Pressing BLOCK FWD will cause the
remainder of the line to be printed and
recorded after a carriage return on the duplicate
tape (cafsette 2). The resulting line on cassette
2 will have the word eliminated.

the error block will be searched and the
possibility of lmissing desired data exists if it is
contained in the error block.
:8-8.2 REMOTE ASC OPERATION. When the data terminal
is equipped with both the ASC and the Remote Device
Control (RDC) options, the ASC also may be activated by
data received over the communications line. Usually, this
data is transmitted to the terminal by a computer (CPU) or
another data terminal.

B-8.1.5 Tape Search Abort. A search in progress will be
automatically and unconditionally terminated if any of the
following conditions occur.
a.

The data cassette in the PLA YBACK mode
reaches clear leader.

The cassette door is opened.

The status of the cassette in the PLAYBACK
mode is changed; i.e., switched to OFF or
LINE.

B-8.2.1 Local Preparation. The RDC permits remote
selection of cassette 1 or cassette 2 in the playback mode.
It also will activate rewinding and loading of the cassettes.
The conditions necessary at the local terminal to permit
search by a remote controller are the following.

B-8.1.6 Playback Errors During a Search. The following
indications and actions occur when the cassette under
search encounters a playback error.
a.

If the stop-on-error option is implemented on
the Playback Control PC card, when an error
occurs the ERROR lamp on the upper panel
will glow and the tape will stop on the error
block until the error is cleared. The error can be
cleared only from the ASR (upper unit) control
panel. The error is cleared as' follows:
(1)

(2)

(3)

If the stop-an-error option is not implemented,

On the ASR (upper unit) switch panel, set
(1) KEYBOARD to OFF
(2) PLAYBACK to LINE
(3)
RECORD to LINE
(4) PRINTER to LINE
(5) Terminal ON LINE/OfF to ON LINE

place cassette(s) to be searched in the tape
transport(s).

Switch the RDC to ON (it must be enabled to
respond to DCl on received data).

The terminal will then permit a remote tape search.
B-8.2.2 Conducting a Search from a Remote Location. The
controlling device may request status of the terminal if
desired (see the Remote Device Control instructions in
Section B-9 for the procedure to request status of a
terminal and the interpretation of the status characters).
The cassette tape to be searched must be loaded and ready
before the search can begin. If the status is not correct for a
search to be conducted, consult the Remote Device Control
operation instructions (section :8-9) and perform the steps
necessary to load and ready the tape cassette to be
searched.

Press CONT STARTi this will cause the
block in error to be fully read and
searched with the possibility of missing
the desired data which may be contained
in the error block.
OR
Press BLOCK. FWD; this will cause the
ASR to read and search the next
sequential block, bypassing the error
block. Again, the possibility of missing
the desired data exists.
OR
Press BLOCK REV, then press BLOCK
FWD or CONT START; the
block-in-error will be reread, and the data
will be recovered if the error is not
permanent.

B-10

The search is activated upon receipt of the ESC
and $ signals by the terminal via the
communication line.

reverse should be performed several times to
ensure that all desired data is transmitted.
NOTE
Data should normally be recorded on
tape so that one BLOCK REV is
sufficient, or the desired data may be
recorded immediately after the search ID
so that only a CONT START or BLOCK
FWD is necessary.

To ensure that the status character does
not become a part of the search ID,
always request status either before
transmitting ESC and $ or after the
search is initiated.

The search ID is entered via the communication
line. This may be trom 1 to 16 printable
characters in length. The search ID may be
selected as described in Section B-S.1.
NOTE
Control characters (including carriage
return and line feed) entered in the search
ID field are ignored.

The X-ON (DC1) character then is entered via
the communication line. The search will then
be conducted. During the search all control
characters are ignored.
NOTE
A c haracter-by-character
block-by-block search cannot
performed from a remote location.

or
be

The controlling device may determine if the
search is complete by requesting status as
described in Section B-9.4. Bit 7 (playback ON)
of the status character indicates the status of
the search. When it is a logic ONE, the search is
complete. When Bit 7 is a logic ZERO, the
search is being conducted.
NOTE
The RDC is normally set up to force bit 7
to a logic ONE when status is requested.
This switch-selectable option must be ON
for the playback-ON feature of the status
character to be enabled (see Section
B-9,4).

B-S.2.3 Reinitiation of Remote Search. The tape cassette
may be searched again for the same data (using the same
search ID) by receipt of ESC, then $, and then DCl (X-ON)
via the communication line.
B-S.2,4 Termination of a Remote Search. The operator (or
CPU) controlling the remote-search may cancel the search
while it is being executed. This is accomplished by
transmitting the DLE character and the ? character via the
communication line. This action causes termination of the
remote search. No indication of search cancel is given at the
searched terminal (i.e., no line feed and carriage return).
A new search ID may be entered (following ESC, $) if
desired. Rewind and load the playback cassette if the
desired data has passed during the previous search.
B-S.2.5 Tape Duplication. Remote control of the tape
duplication process is not possible.
B-S.2.6 Tape Search Abort. The search in progress,
regardless of mode or configuration, will be automatically
and unconditionally terminated if any of the following
conditions occur.

No indication will be given at the searched
terminal (i.e., no line feed and carriage return)
when the search is completed.

The desired data is now located, and it may be
played back as desired (i.e., CONTinuously or a
block at a time; see the RDC instructions,
Section B-9, for command codes).

When it is determined that the search is
completed, the two-character control code for
block reverse (DLE and S) is entered. The block

B-ll

The data cassette in the playback mode reaches
clear leader.

The data terminal is switched OFF-LINE while
a remote search is in progress.

The cassette door is opened.

The status of the cassette in the playback mode
is changed; i.e., switched to OFF or LOCAL.

B-8.2.7 Playback Error During Search. The error status and
indications for the ASC with RDC in on-line mode are as
follows:
a.

playback transport is stopped. If the DC3
character is the last character within the block,
the transport \ stops reading and transmitting
immediately after the DC3 character.

If the stop-on-error option is implemented and
an error occurs during a search, the playback
cassette will be stopped immediately and the
CAN character will automatically be
transmitted to the line (if the CANcel option is
implemented on the RDC card). The
responsibility for clearing the error belongs to
the search initiator.
The methods used to clear the error in the
remote mode are identical to those used in the
local mode, but instructions to the terminal are
transmitted by codes defined in the Remote
Device Control operators instructions (see
Section B-9).

If the stop-on-error option is not implemented,
the search will continue, and the possibility
exists that the error block may contain the
desired data. Again, the RDC will
unconditionally transmit the CAN character if
this option is implemented on the RDC PC
card.

B-9 REMOTE DEVICE CONTROL.

B-9.1 REMOTE DEVICE CONTROL COMMANDS. The
single-character functions and the standard characters to
activate these functions are as follows.
Character

PLAYBACK ON
-DCl (X-ON)
This code switches ON the Playback Control if
the playback cassette transport is READY.

PLAYBACK OFF
-DC3 (X-OFF)
This code switches OFF the Playback Control.
When the playback transport reads a DC3
(X-OFF) character, the next character after the
DC3 is read and transmitted before the

RECORD ON
-DC2 (TAPE)
This code switches ON the Record Control if
the record cassette transport is READY.

-DC4 (~)
RECORD OFF
This code switches OFF the Record Control.
The DC4 character will be the last character in
the record buffer. All characters following the
DC4 will be written into the same buffer
location (overpunched). Thus, it is impossible
to predict the resulting character. It is
recommended that a RUBOUT (DEL) be sent
following the DC4 to ensure the overpunched
character will not cause subsequent system
problems.
NOTE
The contents of the record buffer are not
recorded on the cassette tape when the
RECORD OFF (DC4,~) command is
received. When recording in LINE tape
format, a carriage return will ensure that
the data is recorded on the cassette tape.
When recording in CONTinuous tape
format, it is recommended to send at
least 86 filler characters, usually delete
(DEL); to the terminal after the last data
entry and before the RECORD OFF
(DC4) command is transmitted. If the
terminal is equipped with the ETX option
(described in section B-6.3) and the
terminal is recording in CONTinuous tape
format, the following procedure is
recommended. After the last data entry,
the ETX character should be sent to
initiate recording the final contents of the
buffer on tape.

The Remote Device Control (RDC) option permits a
remote device to control the functional operating modes of
the Model 733 ASR Data Terminal. All functions
controlled by the Remote Device Control are performed
upon receipt of specific ASCII characters. Five functions
are controlled by single ASCII characters; the remaining
functions require a sequence of two ASCII characters.

Function

The playback ON/OFF and/or record ON/OFF functions
can be enabled or disabled from local, received, or
transmitted data by switches located on the RDC printed
circuit card. The functions of these switches are listed in
Table B-9.1. All other functions are enabled on
received-data only.
NOTE
DC3 is the only control character acted
upon during transmission.

B-12

TABLE B-9.1. RDC SWITCH OPTIONS

Switch S2

Description
Enable DC2 and DC4 in LOCAL
Enable DC2 and DC4 from received data
Enable DCl and DC3 in LOCAL
Enable DCl and DC3 from received data
Enable DC3 from transmitted data
Enable playback OFF indicator to bit 7 of status character
Enable automatic CAN character on playback error option

4
5
6*
7*

*These functions are normally disabled (switch in OFF position).

sequence DLE and 2 is received. If a rewind
command is issued for cassette 2 and it is
already on clear leader, the RDC card is
automatically disabled (including EOT decode)
for 1.5 seconds. The RDC card is not disabled if
cassette 2 was not on clear leader.

Auto Disconnect
-EOT
When used with the 300-baud Auto Answer
Control option, this code disconnects the
terminal from the communication line (i.e.,
'hangs up the phone') when the EOT character
is received from the line.
The remaining functions require a sequence of two ASCII
characters. The first character of the sequence is the data
link escape control character (DLE).

Load Cassette 1
-3
When the character sequence DLE and 3 is
received, cassette 1 is loaded if on BOT clear
leader. If cassette 1 is not on clear leader when
this command is received, a fast forward (F/F)
will result. If the cassette is on EOT clear leader
when the command is received, no action
occurs.

Load Cassette 2
-4
When the character sequence DLE and 4 is
received, cassette 2 is loaded if on clear leader
(dual-cassette models only). If cassette 2 is not
on clear leader when this command is received,
a fast forward (F/F) will result. If the cassette is
on EOT clear leader when the command is
received, no action occurs.

NOTE
The printer is automatically disabled
from printing the first character following
the DLE character. Data to the recorder
is not affected.
All two-character functions are enabled from received data
only. The two-character functions and the second character
of the code sequence are the following:
Function
1.

Characters (DLE plus ... )

-1
Rewind Cassette 1
This code rewinds cassette 1 to the clear leader
at the beginning of the tape when the character
sequence DLE and 1 is received. If a rewind is
issued for cassette 1 and it is already on clear
leader, the RDC is automatically disabled
(including EOT decode) for 1.5 seconds. The
RDC is not disabled if cassette 1 was not on
clear leader.

NOTE
A fast forward CANNOT be stopped by a
remote command. The fast forward will
stop when clear leader is reached at the
end of the tape.

Rewind Cassette 2
-2
This code rewinds cassette 2 (dual-cassette
models only) to the clear leader at the
beginning of the tape when the character

B-13

-5
Cassette 1 in Record Mode
On all models the character sequence DLE and
5 places cassette 1 in the record mode. On
dual-cassette models this command also

either the LINE or LOCAL modes the
printer is disabled in the LINE mode only. This
function is resft and reverts to the printer-ON
condition when the terminal is switched OFF
LINE, when the power is turned OFF, or when
the RDC PC card is switched OFF.

automatically places cassette 2 in the playback
mode.

18 1n

-6
Cassette 1 in Playback Mode
On all models the character sequence DLE and
6 places cassette 1 in the playback mode. On
dual-cassette models, this function also
automatically places cassette 2 in the record
mode.

To prevent either loss of data intended
for recording or a resultant r~ad error,
allow at least 0.5 second for the Hrst
block following a load command and
0.25 second for all other blocks before
issuing a RECORD/PLAYBACK mode
change (Le., DLE 5 or DLE 6). The
RECORD/PLAYBACK mode change
command (DLE 5 or DLE 6) is ignored if
the RECORD and/or PLAYBACK is ON
when the command is received. When
recording in CONTinuous tape format, do
not use these commands unless' the ETX
option is enabled, because any data in the
record buffer will be lost.
7.

Block Forward (BLOCK FWD) -7
This code causes the next block of data on the
playback cassette to be read and played back
(or the remainder of a block if the playback of
that block has been stopped).

Block Reverse (BLOCK REV:) -8
This code causes the playback tape transport to
reverse one block of data and stop in the
interrecord gap. This action consumes 0.4
second.

-9
Printer ON
This code enables the printer to receive data
from the communications line (if the printer is
in the LINE mode) after having been disabled
(number 10 below).

10.

Printer OFF
-0 (zero)
When the terminal receives the character
sequence DLE and 0 (zero) from the
communications line, the printer is disabled
from printing (receiving) line data. If the
character sequence is received when the printer

11.

Auto Device Control ON
-: (colon)
This code enables the playback ON, playback
Ol"F, record ON, and record OFF functions on
received data after havingheen disabled by the
Auto Device Control OFF function (number 12
below).

12.

-; (sernicol~n)
Auto ~evice Control OFF
This code disables the playback ON, playback
OF,F, record ON and record OFF functions (on
received data only). This function is
particularly useful when recording data from
the line containing the playback ON/OFF or
record ON/OFF characters (DCl, DC2, DC3,
and DC4). This function is reset and reverts
back to the ON condition when the terminal is
switched OFF LINE, power is switched OFF
and ON, or the RDC PC card is switched OFF.

13.

Request Status
< (less-than symbol)
This code enables the terminal to send a status
character. It is particularly useful in
determining when a rewind, load, etc. function
has been completed. See paragraph B-9.4 below
for an interpretation of status characters.

14.

ASC Remote Cancel
-? (question mark)
When used with the Automatic Search Control
option, this code cancels a remote search once
it has been started. This is the ON-LINE
equivalent to the local search operation
BREAK key. During an on-line search, the DC3
(playback OFF) control character is ignored if
encountered~ No data is transmitted during an
on-line search except status (if it has been
requested) or the CAN character if a playback
error is made and the CAN character option is
enabled.

B-9.2 LOCAL OPERATION. In the local (off-line) mode of
operation, the only functions the RDC can execute are the
following:
Playback ON
Playback OFF
Record ON
Record OFF

B-14

-DCl (X-ON)
-DC3 (X-OFF)
-DC2 (TAPE)
-DC4(~)

immediately be followed with a load
cassette-l command (DLE plus 3). If
cassette 1 has not completed the rewind,
the load command is ignored. See Table
B-9.2 for a list of command execution
times.

The conditions recommended for using the Remote Device
Control in the local mode are
(1) *RDC switch to ON
(2) KEYBOARD to LOCAL
(3) PLAYBACK to LOCAL
(4) RECORD to LOCAL
(5) PRINTER to LOCAL (if desired).

Status may be requested at any time except for 1.5 seconds
after a rewind command with the cassette on clear leader.
This is useful if the remote controller is uncertain a
command has been completely executed (e.g., rewind).

NOTE
When the playback is ON (playback ON
lamp illuminated) and the keyboard is in
the same mode as the playback (i.e.,
LINE or LOCAL), the keyboard is
"locked out" and all data from the
keyboard is ignored.

B-9.4 RDC STATUS CHARACTERS. The status character
transmitted by the terminal as a result of a status request
command is a single ASCII character, the data bits of which
indicates the status of the playback, record, and printer
functions.

B-9.3 INITIAL SETUP. All functions (except EOT) of the
RDC may be either enabled or disabled via a switch
accessible under the terminal cover. When this switch is in
the ON position, all functions are enabled. When this switch
is in the OFF position, the auto disconnect (EOT) is the
only function enabled.

B-9.4.1 Status Character Bits. The status information
indicated by each bit of the status character is as follows:
Bit 1 - (Least significant bit) indicates that the playback
function is ready when bit 1 is a logic ONE. If bit 1 is a
logic ZERO, playback is not ready for one or more of the
following reasons:

The conditions recommended to permit a 733 ASR Data
Terminal to be controlled by a remote device are the
following:

(1)

Cassette door open or cassette not in place.

(1) *RDC switch to ON

(2)

Cassette on clear leader.

(2)
(3 )

(3)

Playback not in LINE mode.

(4)

Other operations being performed (i.e., rewind
and load).

(4)

(5)
(6)
(7)
(8)

KEYBOARD to OFF
PLAYBACK to LINE
RECORD to LINE
PRINTER to LINE
Termin J ON LINE/OFF switch to ON LINE
Tape cassette(s) in the transport(s)

Bit 2 - indicates a playback error has been made if bit 2 is
a logic ONE. A logic ZERO indicates a playback error has
not been made. If the playback is strapped to not stop on
an error, bit 2 will indicate a ONE only while a block with
an error is being (or waiting to be) transmitted.

DCl through DC4 functional pencil switches on
the RDC PC card enabled to line data (received
and/or transmitted data) as listed in Table
B-9.1.

NOTE
A playback error may be cleared either
by using the remote control codes or
locally by using the manual controls; i.e.,
playback ON, BLOCK REV, or BLOCK
FWD (see Section 4-8).

NOTE
Remote commands to the terminal must
allow adequate time between commands
to permit execution of each command.
For example, a cassette-l rewind
command (DLE plus 1) cannot

*The RDC ON/OFF switch is labeled ADC ON/OFF on the
PC card rack cover.

B-1S

Bit 3 - indicates cassette 1 is on the clear leader at either
end of tape if bit 3 is a logic ONE. A logic ZERO indicates
cassette 1 is not on clear leader.

(5)

Bit 5 - indicates that the record function is ready to be
enabled with the record-ON function when bit 5 is a logic
ONE. If bit 5 is a logic ZERO, record is not ready for one
or more of the following reasons:
Cassette door open or cassette not in place.

(2)

Cassette on clear leader.

(3)

Record not in LINE mode.

(4)

Other operation being performed (i.e., rewind
and load).

tab

removed

from the tape

Bit 6 - indicates that the printer is ready when bit 6 is a
logic ONE. If bit 6 is a logic ZERO, the printer is not ready
for any of the following reasons:

Bit 4 - same as bit 3 except applied to cassette 2.

(1)

Write-enable
cassette.

(1)

Printer not in LINE mode.

(2)

Printer is OFF as a result of a printer-OFF
command or while the ASC is searching.

Bit 7 - always a logic ONE to force the status character out
of the control character subset. This bit may be optionally
strapped to indicate playback-ON status. In this case a logic
ZERO indicates the playback is ON (i.e., playback either

TABLE B-9.2. MODEL 733 ASR COMMAND EXECUTION TIMES

Command

1 REWIND

Maximum Time
60 sec
3 sec
400 msec
T =0.4 + 0.25 (N-1)
(forN>0)
T =0 for N =0

2 LOAD

BLOCK REVERSE
3 RECORD-OFF
(When followed by
a RECORD/PLAYBACK
mode change)

1 Time

to rewind from the right end of the tape. A status request may be used to determine when a rewind is complete (the
cassette will be on clear leader).

2 Status

may be requested to determine completion of this command. The cassette will become ready.

3T = time in seconds
N = In LINE tape format (or CONT tape format with ETX option) the number of carriage returns (or ETX's when in CONT
tape format) received by the terminal within 250 msec immediately before receiving RECORD OFF. The very Hrst block on
the tape requires 0.250 sec additional time.

B-16

reading tape or transmitting data), and II. logic ONE
indicates playback is not ON. This option is particularly
helpful in determining when the Automatic Search Control
option has completed a search. If this option is used, the
status character will not be excluded from the control
character subset.

B-9.5 ERROR DETECT. The automatic error-detect
feature causes transmission of the CAN (cancel) character
when a playback error occurs. This option is strappable and
allows the system to recover from playback error in
minimal time in cases where the Model 733 ASR is strapped
to stop-on-error. See Table B-9.1 for information to enable
the error-detect option.

EXAMPLE: If the playback is ready, a playback error
has not been made, cassette 1 is not on clear leaderr,
cassette 2 is on clear leader, record is not ready, and
printer is ready; the status character would be

B-9.S.1 Non-Stop-On-Error Operation. If a playback error
occurs and the stop-on-error option is not incorporated on
the Playback Control PC card (see Section B-6.2 for further
details), the CAN (cancel) control character will be
transmitted before the erroneous block of data is
transmitted. The erroneous block will consist of true data
to the point in the block at which the read error occurred
and the NUL (null) control character from that point to the
end of the block (a total of 86 characters: true data and
nulls).

b l -ONE
)
b 2 -ZERO
b 3 -ZERO
= the USASCII character "i"
b 4 -ONE
bs -ZERO
)
b 6 -ONE
b 7 - *ONE
*strapped to logic ONE

B-9.S.2 Stop-On-Error Operation. If a playback error occurs
and the stop-on-error option is incorporated on the
Playback Control PC card (see Section B-6.2), the CAN
control character will be transmitted after the last block of
"good" (no playback error) data. The CAN character
indicates that the next block of data on tape contains a
playback error. No more taped data will be transmitted
until the playback error is cleared.

A complete list of status characters is contained in Table
B-9.3.
B-9.4.2 Use of Status character Information. In addition to
the specific status indicated by each bit of the status
character, combining specific commands with the status
information reveals certain facts. For example:
(1)

The playback error may be cleared using one of the
following methods.

If both cassettes are on clear leader following a
rewind, issuing a load command to either
cassette and verifying whether PLAYBACK or
RECORD comes ready provides "mode" status
for each of the cassettes.

(2)

If a rewind command is issued when a cassette
is on clear leader and the clear leader status
does not change within 1.5 seconds, the
cassette is at beginning-of-tape clear leader (not
end of tape). Similarly, if a "load" command is
issued and the PLAYBACK or RECORD
(whichever is appropriate) does not come
ready, the cassette is on end-of-tape clear
leader.

(3)

(4)

Replaying the Block
(1)

Send a block reverse command (DLE and
8).

(2)

After sufficient time for this command to
be executed has elapsed (typically 400
milliseconds), send a block forward
command (DLE and 7). This causes the
block of data to be reread. If the error
recurs, the CAN character will again be
transmitted by the terminal.
If there was no playback error, the block
of data will be transmitted and playback
may be resumed.

After a rewind command is issued, the clear
leader status will indicate when the rewind is
complete.

After a load command, the PLAYBACK or
RECORD ready status will indicate when the
load operation is complete.

Reading (Transmitting) the Block With an Error
Send the playback ON command (DC1). The
erroneous block will then be transmitted in the
mode (playback ON or block forward) in effect

B-17

TABLE B-9.3. REMOTE DEVICE CONTROL STATUS CODES AND CHARACTERS

Status Code
Status

Parity

Character

A
C

D
E
G
H
I
K
L
P

Status Code

High
Printer Recorder
Clear
Clear
Playback Playback
Status
Parity
(ONE)
Ready
Ready
Leader
Leader
Error
Ready ~haracter
or
(ONE)
(ONE) Cassette- Cassette- (ONE)
(ONE)
Playback
2
1
OFF

b
8

P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P

1
1
1
1
1
1
1
1
1
1
1
1
1
1
1

a
a
0
0
0
0
0
0

b
6

b
4

a
a
a
a
a

a
a
a

0
0

0
0
1
1
1
1
1

0
1
1
1
1

1
1
1
0
0

a
a
a
a
a
a
a
a

a
a

0
0

a
a
a

0
1
1

a
a
a
a
1

a
0

a
a
1
1
0

a
1

a
a
a
1

a
a
0
1
1

a
0

a
a

b
2

b
1

a
a

1
1
0
1
1
0
1
1
0

a
c
d
e

a
a
1

a
0
1
0

a
a
1

a
a
a
1

a
1
0
1

a
1

a
1
1

a
a
1
1
1
1
1
1
1
1

g
h
i
k

I
P
q
s
t

#
%
/
)

+
1
3

P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P

High
Printer Recorder
Clear
Clear
Playback Playback
beader
(ONE)
Ready
Ready
Leader
Error
Ready
(ONE)
(ONE)
Cassette- Cassette- (ONE)
or
(ONE)
Playback
2
1
OFF
b
7

b
6

b
4

1
1
1
1
1
1
1
1
1
1
1
1
1
1
1

1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1

a
a
a
a

a
a
a

0
0

a
a

0
0
0

1
1
1
1

a
a
0

a
0

a
a
0

a
1
1
1
1
1

a
a
0

a
a
a
1
1

a
a
0

a
1

a
0
0
0
1
1
0

a
1
1
1
0
0
0
1

a
a
a
1

a
a
0
1
1

a
0

a
a

0
1
1

0
1
0

1
1
0
1
1

a
1
0

a
a
1

a
0

a
1

a
1
0
1

a
1

a
0
1
1

a
a
1
1
1
1
1
1
1
1

*Bit7 (b7) is normally held in the logic ONE state. If the playback-OFF indication option is used (S2-7 in ON position), a
logic ONE indicates the playback function is OFF and a logic ZERO indicates the playback function is ON. When the
playback OFF option is used, some of the status characters may be control characters as indicated by the shaded characters.

before the error occurred. The data transmitted
from an erroneous block consists of true data
to the point in the block at which the read
error occurred and NUL (null) control
characters from that point to the end of the
block (total of 86 characters: true data and
nulls).

Skipping the Block With an Error
Send a block forward command (DLE and 7).
Playback will bypass the erroneous data block
and continue playback in the mode (playback
ON or block forward) in effect before the error
occurred.

B-18

B-10 1200 BAUD INTERFACE.

B-10.1 1200 BAUD OPERATION. To operate the data
terminal in 1200-baud mode, the following steps are
recommended.

The 1200 Baud Interface option permits a Model 733 ASR
Data Terminal to transmit and receive data to and from the
tape cassettes at the rate of 120 characters per second
(1200 baud). There are several physical differences between
a Model 733 ASR equipped with the 1200 Baud Interface
option and a standard Model 733 ASR equipped for 300
baud (maximum) operation. The standard line interface
with the 1200-Baud option is the EIA RS232C which is
compatible with the Bell Systems' 202D, 202R, 202C, and
202S (or equivalents) data sets. Interface cable pin
functions are listed in Table B-10.1. The 1200-Baud
equipped terminal includes the following:
(1)

(2)

A HIGH/LOW speed switch is added to the left
of the ON-LINE/OFF switch.
The PARITY switch is located on the
Transmitter PC card, the rearmost PC card in
the left row of the lower unit PC card rack.

The printer is normally disabled from printing line data, but
the 1200 baud data terminal has a strappable option which
enables the printer when the terminal is operating at 1200
baud with the PRINTER switch in the LINE position.
Implementation of this strappable option is not
recommended unless the terminal is also equipped with the
Remote Device Control option (see Section B-1 0.4).

(1)

Set the PARITY switch under the terminal
cover as desired (even, odd, or continuous
marking).

(2)

Select either HALF or FULL duplex operation
as required by the communication line. HALF
duplex must be selected unless four-wire
transmission is used.

(3)

Set the Speed HI/LO Switch to HI.

(4)

Set the terminal ON-LINE/OFF switch to
ON-LINE.

(5)

Set the KEYBOARD to OFF or LOCAL.

(6)

Set PLAYBACK to LINE.

(7)

Set RECORD to LINE.

(8)

Set PRINTER to OFF or LOCAL.

TABLE B-10.1. 1200-BAUD, EIA INTERFACE CABLE, PIN FUNCTIONS 4
(CABLE,TI PART NO. 959372-0002)
Connector Pin Numbers
Terminal

6
7
8
9
10
A
C
H
K

Pin Function

Data Set
20
7

Data Terminal Readyl
Signal Ground
Clear to Send 2
Data Set Ready~
Received Data
Protective Ground
Request to Send6
Transmitted Data
Data Carrier DetectS

5
6
3
1

4
2

NOTES:
1 Held to an ON condition by the data terminal ON LINE switch.
2Turned ON by the modem in response to "request to send;" typical delay is approximately 220 msec; required for
data transmission.
3 Held to an ON condition when data set is operative; required for terminal operation.
4 All are used only with external modem.
SHeld to an ON condition by modem when carrier is received or transmitted; required by terminal for data reception.
6Turned ON by terminal to request transmission; turned OFF 20 msec after transmission ends.

B-19

Af~er the speed has been selected, set the HIGH/LOW speed
SWItch to LOW. The terminal will operate as a standard
300-baud Model 733 Data Terminal. Low speed, full
duplex operation requires a type 103 or 113 series data
set (or equivalent) to operate on a communication line.

The terminal is now ready to transmit (play back) or
receive (record) information at 120 characters per second
(1200 baud). Information may be recorded on tape from
the communication line at the 1200 Baud rate and later
printed locally (OFF-LINE) at 30 characters per second.

NOTE
The 1200 Baud option, when used in
either the 300-baud or 1200-baud mode
in HALF-DUPLEX, has a 20-millisecond
request-to-send delay time. This means
the terminal will not accept line data
un til 20 milliseconds have elapsed
following transmission of the last
character of data.

B-I0.2 CONTINUOUS VERSUS LINE FORMAT. The
1200-Baud transmitter section uses a 64-character
first-in/f.trst-out (FIFO) buffer (temporary storage) which
stores data from the data bus before transmission to the
communications line. This permits the transmitter to
operate at virtually 100 percent line efficiency. To achieve
such high line efficiency it is necessary for the data to be
played back so the FIFO is never empty. Therefore, data to
be transmitted should be recorded in CONTinuous tape
format before it is transmitted at 1200 baud. This will
ensure high communications line efficiency.

When using the 1200 Baud option in HALF-DUPLEX in
either the 1200 or 300 baud modes, and using an EIA
interface directly (such as to a computer), the user should
be aware of the 20-msec delay time before the receiver is
enabled to receive line data. In modem-type interfaces (e.g.,
the 202 series or equivalent) the modem turnaround time is
concurrent with this delay and, hence, is transparent to the
system.

If the data transmitted to the line is recorded in LINE tape
format, :::t least 33 characters must be recorded in each
block of LINE-formatted tape data to achieve 100 percent
communication line efficiency. A lower efficiency will
result if fewer than 33 characters are in a block of
LINE-formatted data.
If the 1200 Baud Interface option is used in conjunction
with the Automatic Device Control (ADC) or Remote
Device Control (RDC) options, the following situation may
occur in FULL DUPLEX operation. When the DC3
(playback OFF) command is received from the line, the
contents of the FIFO are transmitted before the
transmission halts. Therefore, up to 64 characters may be
transmitted before data transmission stops.

B-I0.4 PRINTING IN 1200 BAUD MODE. The printer
normally is disabled when the terminal is in the 1200-baud
mode and it is ON LINE. However, a strappable option
permits the printer to be enabled in the 1200-baud mode.
This is accomplished by removing R-I0 from Jl and J2 (no
tools required) of the 1200-Baud Receiver PC card (TI Part
No. 962291, slot AS in the lower ASR unit). It is
recommended that this strappable option not be
implemented unless the terminal is also equipped with the
Remote Device Control (RDC) option. If the printer is
enabled, the following procedure must be used to simulate
300 baud transmission for proper response of the terminal
printer:

When recording in the LINE tape format, each data block
must consist of at least 40 characters to prevent
overflowing the record buffer. For this reason, recording in
CONTinuous tape format is recommended. (See Section
4-5.2 for further information).
B-I0.3 LOW SPEED OPERATION. The 1200-Baud option
equipped data terminal may also operate on-line at a
selected lower speed (110, 150, or 300 baud) as deter.mined
by the speed switch located under the terminal cover. The
speed switch settings and baud rates correspond as follows:
Speed

Baud

LOW
MED
HIGH

110
150
300

Each character must be followed by three HIler
characters [usually delete (DEL)).

If carriage return and a line feed are to be
transmitted, three filler characters [usually
delete (DEL)) must be inserted between the
carriage return and the line feed, followed by
18 more HIler characters.

If carriage return only is sent, 22 filler

Characters per Second
10
15
30

characters after the carriage return should be
sent.

\
B-20

This compensates for

B-11.2 OPERATION. To enable the footpedal to actuate
playback-on:

(1)

The 30 millisecond print cycle
The 190 millisecond carriage return delay time
(a carriage return from column 1 only causes a
1-character time delay of 30 milliseconds).

(2)

The printer may be selectively turned ON or OFF if the
terminal is equipped with the Remote Device Control
(RDC) option and the 1200 baud print option is
implemented (R10 removed).
NOTE
While recording in CONTinuous tape
format, it is desirable to have the ETX
control character initiate the recording of
a block of data. This is possible only on
terminals equipped with the Dual-Format
Record Buffer (962285). See Section
B-6.3 for further information
On Terminals equipped with either the
Automatic Device Control or Remote
Device Control options, see Section B-9.1
for recording precautions concerning data
terminals which do not have the ETX
option.

B-ll MODEL 733 ASR FOOTPEDAL.
The Footpedal option for all Model 733 ASR Data
Terminals (ASCII code) with the Remote Device Control
option permits convenient footswltch actuation of the ASR
tape transport playback function. The footpedal is
particularly useful when using prerecorded format tapes.

A footpedal

•
•

A 7-foot, heavy duty shielded cable

Set the RDC ON/OFF switch under the
terminal cover (labeled ADC ON/OFF) to ON.

Load and ready the cassette to be played back
(see Section V for detailed instructions). The
PLAYBACK READY lamp m.ust illuminate.

Set the PLAYBACK device function switch
(ASR Module display panel lower row) to
LOCAL.

Depress the footswitch to actuate playback-on.

NOTE
The footswitch will not actuate playback-off.

B-l2 ACOUSTIC COUPLER.
The Acoustic Coupler option, available for TI Models 733
ASR and 733 KSR Data Terminals, equips the terminal to
transmit and receive data over voice-grade telephone lines.
Operating at data rates up to 303 baud, the Acoustic
Coupler will interface with any standard Western Electric
500-series (or equivalent) type telephone set. A typical
application of the Acoustic Coupler-equipped terminal is to
gain direct access to computer timeshare systems simply by
dialing an appropriate number on any available telephone.
B-12.1 COMPONENTS. The Acoustic Coupler option
consists of:

B-ll.1 COMPONENTS. The Footpedal installation consists
of
•

A connector to mate with the 733 ASR
auxiliary interface connector 0"2) at the rear of
the data terminal.
NOTE
The Footpedal option is adaptable only
on Model 733 ASR Data Terminals which
are equipped with the Remote Device
Control option.

B-2l

(1)

Telephone handset panel with muffs which
mounts neatly on the Model 733 ASR/KSR

(2)

Electronic interface mounted on a PC card
which plugs into the main PC card rack

(3)

Cable to interconnect the telephone handset
panel to the PC card

(4)

Connector jumper which plugs into the
communication line interface connector 0"1) at
the rear of the Model 733. The connector
jumper precludes operation of the data terminal
with any other external EIA communications
devices. An optional "Y" connector is available
to permit communication through both the
Acoustic Coupler and a variety of other
communication links.

TABLE B-12.1. PIN ASSIGNMENTS FOR THE ACOUSTIC COUPLER
JUMPER CONNECTOR (TI PART NO. 973 258)
H to 1
10 to4
8toB
9 to C
Kto 5

JUMPER PLUG
ITI PART NO. 973258-00011
TIMESHARE SYSTEM

r------~----------

I
I
I

MODEL 733
DATA TERMINAL

-;';;N-;'iSSl(;i LiNe- -

I
I

TIMESHARE
COMPUTER

I
I
I
L.. -

I
:
-,
I
I
I
IL_____ JI

a. STANDARD (THROUGH' JUMPER CONNECTOR FOR ACOUSTIC COUPLER OPERATION

ir~;~E:~~~tER

- - - - - -;.: : :- :- :

CABLE'

:-~~§i_~;----

{ X-Y RECORDER
VIDEO DISPLAY
EXTERNAL COMPUTER

MOOEL 733
':'
OATATERMINAL
OTHER DATA TERMINAL
COMPUTER SYSTEM·
{ CASSETTE RECORDER
DATA ACQUISITION SYSTEM
IOTHER DEVICES MAY
USE ACOUSTIC COUPLER'

TRANSMISSION LINE

b. MODEL 733 OPTIONAL "Y" CONNECTOR,TYPICAL USES

FIGURE B-12.1. OPTIONAL ACOUSTIC COUPLER APPLICATIONS

B-22

ACCESS TO
DATA TERMINAL

ACCESS TO
ACOUSTIC

COUPLER

A block diagram of Acoustic Coupler applications and
interfaces is shown in Figure B-1 2.1. Pin assign men ts for
the standard jumper connector and the optional "Y"
connector are listed in TablesB-12.1and B-12.2.

NOTE
The CARRIER detect indicator lamp on
the Acoustic Coupler panel may
illuminate if the POWER switch is on and
the telephone handset is not placed in the
muffs. In addition, random characters
may be printed if the ON LINE switch is
set to ON LINE. These anomalies are
caused by room noise detected by the
sensitive Acoustic Coupler.

B-12.2 STANDARD OPERATION. The standard data link
to the Model 733 ASR/KSR equipped with the Acoustic
Coupler option is made through the telephone handset. To
complete this data link (for example, to a timeshare
computer data network) proceed as follows:
a.

Set the data terminal POWER switch to ON.

Set the ON LINE/OFF switch to OFF.

On a Model 733 ASR, also set the KEYBOARD
and PRINTER switches on the ASR Module
switch panel (upper unit) to LINE.

On the telephone, dial the appropriate numbers
to connect the data terminal to the data sources
at the other end of the telephone line. An
audible, high frequency tone (MARK) will be
heard over the handset when communication is
established.

place the telephone handset into the Acoustic
Coupler panel muffs so that the handset cord is
to the rear (marked CORD atop the Acoustic
Coupler panel).

Set the DUPLEX switch under the terminal
cover to FULL or HALF DUPLEX according to
your system requirements.

TABLE B-12.2. PIN ASSIGNMENTS FOR ACOUSTIC COUPLER
OPTIONAL "Y" CONNECTOR (TI PART NO. 973254)

Y-Connector
Pin No.
A
H
10

8
9
7
K
6
F
1
4
B
C
3
5
A

Signal Source

Function

Data Terminal
Data Terminal
Data Terminal
Data Terminal
Data Terminal
Data Terminal
Data Terminal
Data Terminal
Data Terminal
Acoustic Coupler
Acoustic Coupler
Acoustic Coupler
Acoustic Coupler
Acoustic Cou pIer
Acoustic Coupler
Acoustic Coupler

Protective Ground
Transmitted Data
Received Data
Clear-to-Send
Data-Set Ready
Signal Ground
Carrier Detect
Data-Terminal Ready
Req uest-to-Send
Transmitted Data
Received Data
Clear-to-Send
Data-Set Ready
Signal Ground
Carrier Detect
Protective Ground

B-23

External Connector
Pin No.
1
2
3
5
6
7

Cannon DP-25P
or Equivalent

8
20
4
2
3
5
6
7

8
1

)
)

Cannon DP-25S
or Equivalent

Immediately set the ON LINE/OFF switch to
ON LINE. The Acoustic Coupler electronics
will generate the appropriate tones to comolete
the connection and activate the CARRIER
detect indicator lamp.

Begin communication according to your system
instructions; the terminal is ready to send or
receive data. At this point, data terminal
operation is equivalent to communicating over
a 103-type data set, and all terminal input and
output devices (i.e., keyboard, record,
playback, printer) are available for
communication in the full or half duplex mode.
A variety of operational configurations are
possible; for detailed instructions see Sections
IV and V of the Operating Instructions.

After prolonged operation the carbon
p articles in the telephone handset
transducer elements may settle, causing
data errors. If this occurs, simply remove
the handset from the muffs and rap the
handset several times in the palm of your
hand. Reestablish communications, if neccessary, by repeating steps d. through g.

FIGURE B-12.2. OPTIONAL ACOUSTIC COUPLER FOR
MODEL 733 ASR/KSR

B-13
BINARY
FORMAT).

To terminate communications:
(1)

(2)

Switch the data terminal ON LINE/OFF
switch to OFF; remove the telephone
handset from the muffs and replace in its
cradle (hang up).

(DUAL

B-13.1 RECORDING FORMATS. The ASR (upper unit)
TAPE FORMAT switch controls the format in which data
is recorded on tape as follows:

•

Ensure that all applicable devices
(PLAYBACK, RECORD) are set to OFF.
OR

(3)

FORMAT

The Binary Data Format option enables the Model 733
ASR Data Terminal to record and play back either 8 bits of
data (binary) or standard ASCII format (7 bits). The basic
terminal functions (rewind, load, continuous start/stop,
etc.) are the same as a standard Model 733 Data Terminal.
The distinguishing characteristic of a Dual Format option
data terminal is the tape recording and playback
techniques.

If the communication channel is lost during
operation (the CARRIER detect indicator lamp
extinguishes), return to step b. above and
repeat the procedure.

DATA

Transmit the appropriate disconnect code
(if required) and wait for
acknowledgement (if required).

B-24

In the LINE position, tape recording of data
blocks is initiated when either the ASCII
carriage return character or the 86th character
of each block is loaded into the record buffer.
The 8th bit of each character .(except carriage
return) is forced to a logic ZERO. The 8th bit
of the carriage return character is forced to a
logic ONE.

•

In the CONTinuous position, recording of data
on tape is initiated only when the 86th
character of each block is loaded in the record
buffer. All 8 bits of a character field are
recorded; the logic level of the 8th bit is
retained as received.

In the ON-LINE posItlOn, the playback
transmits in binary; i.e., all 8 bits of each of the
86 characters per block which are on tape are
transmitted as recorded. When a LINE format
tape is played back to the line (terminal
ON-LINE), all 86 characters per block on tape
are transmitted regardless of the carriage return
character. Normally the carriage return
character initiates the reading of the next block
of data; however, in binary format playback
(i.e., terminal ON-LINE/OFF switch to
ON-LINE) the entire block (86 characters
including data plus nulls) is read and
transmitted to the line. To play back ASCII
data (e.g., for timesharing), the information
may be generated locally in LINE format,
edited, and duplicated into the CONTinuous
format prior to transmission (see Section
B.13.4). This technique prevents transmission
of the nulls following the carriage return
characters in each block.

In the OFF-LINE position the terminal plays
back local data in the standard manner; i.e., the
terminal reads the next block recorded on tape
when a logic ONE is detected in the 8th bit of a
character being played back or after the 86th
character of each block of data.

In both recording formats the last character stored in the
record buffer is displayed on the ASR CHARACTER
display. While data is in the buffer, it may be modified
using the ~ and ~ keys when the record function is
in the local mode as described in Section 4-5.8.
B-13.2 BINARY DATA RECORDING. To record binary
data from the communications line, the following
procedure is recommended.
On the ASR panel lower switch row, set
(1) KEYBOARD to OFF
(2) PLAYBACK to OFF

(3) RECORD to LINE
(4) PRINTER to OFF.
Insert a blank tape cassette (with write tabs installed) into
the cassette 1 transport and
(5) Set the RECORD CONTROL ON/OFF switch
to OFF

B-13.4 TAPE DUPLICATION
FORMAT TERMINALS.

BINARY

DATA

(6) Press CASSETTE 1 REWIND

B-13.4.1 Line Format Tape Duplication. A tape recorded in
LINE tape format may be duplicated only in the local
mode, using the following recommended procedure.

(7) When the END lamp lights, press CASSETTE 1
LOAD/FF. The READY lamp should light after
a few seconds.

On the ASR switch panel lower row, set
(1) KEYBOARD to OFF

(8) Set the TAPE FORMAT switch to CONT
(2) PLAYBACK to LOCAL
(9) Set the terminal ON-LINE/OFF switch to ON
LINE.

(3) RECORD to LOCAL
(4) PRINTER to OFF.

(10) Set the RECORD CONTROL ON/OFF switch
to ON.

Insert the tape cassette to be duplicated (original tape) into
the CASSETTE 1 transport.

The terminal will now receive and record binary data on
tape.

(5) Set the RECORD CONTROL ON/OFF switch
to OFF

B-13.3 BINARY DATA PLAYBACK. Playback of data is
controlled by the terminal ON-LINE/OFF switch. The
ON-LINE/OFF switch also puts the terminal on-line or
off-line. The tape is played back as follows.

(6) Set CASSETTE 1 to PLAYBACK; CASSETTE
2 will be in RECORD

B-25

(14) Press the CONT START switch to begin tape
duplication. Data will be duplicated until the
END lamp lights. To stop the duplication
process at any time press (CONT) STOP.

(7) Press CASSETTE 1 REWIND
(8) When the END lamp lights, press LOAD/FF.
The READY lamp should light after a few
seconds.

NOTES

Insert a copy tape cassette into the CASSETTE 2 transport
and,

When the data terminal is in the binary mode,
the Auto Device Control or Remote Device
Control should be switched OFF to prevent
either from decoding control characters from
binary data.

The Auto Search Control will search binary
data but only the first 7 bits of each character
or word will be sensed.

A BINARY tape cannot be played back when
the terminal ON-LINE CONTROL is OFF since
the first occurrence of a logic ONE in the 8th
bit will terminate the reading of a block and
cause the playback to proceed to the next
block.

When entering data. from the keyboard, the first
(LSB) and eighth (MSB) bits of the keyboard
character will be the same when recorded in the
binary mode (TAPE FORMAT switch to
CONT) or any time keyboard data is
transmitted by the line interface (i.e., no parity
is generated by the keyboard).

(9) Press CASSETTE 2 REWIND
(10) When the END lamp lights, press LOAD/FF.
The READY lamp should light after a few
seconds.
(11) Set the RECORD CONTROL ON/OFF switch
to ON. The ON lamp should light.

(12) Set the TAPE FORMAT switch to LINE.

(13) Set the terminal ON-LINE/OFF switch to OFF.
NOTE
To duplicate from LINE to CONTinuous
format (e.g., ASCII data for transmission
to the line without trailing nulls after the
carriage returns), set the TAPE FORMAT
switch to CONT. A tape recorded in
LINE format which is duplicated in
CONTinuous format on a
binary-equipped terminal is usable only
on a binary terminal; such a tape may
only be played back or duplicated locally
when the terminal ON-LINE/OFF switch
is set to ON LINE.
(14) Press the CONT START switch to begin tape
duplication. Data will be copied until the END
lamp lights. To stop the duplication process at
any time press (CONT) STOP.
B-13.4.2 Binary Format Tape Duplication. A tape recorded
in binary format may be duplicated in the local mode by
the following procedure.
Perform steps B-13.4(1) through (11) above.
(12) Set the TAPE FORMAT switch to CONT
(binary).
(13) Set the terminal ON-LINE/OFF switch to
ON-LINE.

B-26

APPENDIXC
OPERATOR'S QUICK- REFERENCE CARD*

This card laminated in plastic is availahle as TI Part No. 959230.

-----

I. DEVICE FUNCTION SWITCH SETUP

I Set

the KEYBOARD. PLAYBACK. RECORD. and PRINTER
switches to the desired positions according to the table on the
reverse side of this card.

I
I

IL. _ _ _ _ _ _ _ _ _ _ ....J

TEXAS INSTRUMENTS
INCORPORATED

TAPE SIDE UP

VII. REMOVING THE CASSETTE
II. CASSETTE INSTALLATION
1. If cassette is in RECORD mode, press the (RECORD
CONTROL) OFF switch and then the REWIND switch for
that cassette.
2. If the cassette is in the PLAYBACK mode. press (CONT START)
STOP and then the R EWI ND switch for that cassette.
3. Pull open the transport door to pop out the cassette.

1. Pull open the cassette transport door and install cassette.
2. Make sure cassette has tape side up. To record on a cassette,
the WR ITE tab must cover hole for side to be recorded on.
3. Close the cassette transport door.

III. READYING THE CASSETTE
REEL ROTOR

1. Press the REWIND switch for the appropriate cassette. The
·END lamp will come on.
2. Select PLAYBACK or RECORD mode with the center switch.
The appropriate RECORD and PLAYBACK lamp will come
on.
3. Press the LOAD/FF switch momentarily and release.
4. The cassette is ready when the READY lamp comes on.

VIII. INITIATING A RECORD
, - - - _ CASSETTE 1

' ': : : :
IRI~!~:;:*;:~D 'IO:~II~i;:' : ::::~D ---'I'~~t~
J:::~ R'C~::

1. After a cassette is installed and readied, pushing the LOAD/FF
switch will cause the tape to advance at high speed.
2. To stop, push STOP switch for the appropriate cassette.

:::V8AC<

V. INITIATING A PLAYBACK

CHAR
FWO

I l'i'i I}\~
Ir

I
I

.........

:::::::::

........
.:::::::;

.::::=::::

ERROR

:::::::::

::::::::::

STOP

REV

IX. ERASING THE TAPE

1. Perform steps I, II, and III.
2. Be sure cassett~ to be erased is set to RECORD mode.
3. While holding. the (RECORO CONTROLI ERASE switch
depressed. press (RECORD CONTROLI OFF. Release OFF
first. then ERASE.
4. To stoP. press (RECORD CONTROL) OFF switch.
5. Repeat step III to ready cassette.

@•••••• j)

II
-;-u-: ;---I--:'N'-I--I,

}t
.........

VI. CORRECTING A PLAYBACK ERROR
If the ERROR lamp comes on:

BLOCK
FWD

:;:; ;: :
I............

KE~:!:!:~RO

LOCAL

ERASE

I:i~t:::
.....
.........

I: : : : :

PL~~~~~CK

R~:~~·D

.....
..........

LOCAL

OFF

I: : : : :

P~:~~~~R

..JI

..........:....

L ______________

siLENT 700®
Electronic Data Terminals

1. Perform steps I, II, and III.
2. Select LINE or CONTinuous tape format with the TAPE
FORMAT switch.
3. Push (RECORD CONTROL) ON switch. The ON lamp will
come on.
4. Start recording from the keyboard, the line, or initiating on
playback (perform step V.l
5. To stop. push the (RECORD CONTROL) OFF switch.

RECOR.D CONTROL

PLAYBACK CONTROL
CONT
START

1. Perform steps I, II, and III.
2. Push the appropriate PLAYBACK CONTROL switch:
- CONT START. or
- BLOCK FWD. or
-CHAR FWD
3. To stop. push the (CONT START) STOP switch.

1. To transmit the error block press CONT START.
2. To skip the error block. press BLOCK FWD.
3. To reread the error block. press (BLOCK) REV and ther
CONTSTART

I I;:~ :~ D

IV. FAST FORWARD

.....

CASSETTE 2

MODELS 732 and 733 ASR
050173

QUICK REFERENCE CARD

X. EDITING
1. Set the terminal ON-LINE switch to OFF
2. If while typing a line to be t8corded, a mistake is made:
A. Use Tape backspace key (~) to back up to the
erroneous character. "Strike over" with the correct
character. Use the tape advance key (~) to return to
last character recorded and continue recording.
B. To replace the entire line, push (RECORD CONTROLl
ERASE switch followed by PAPER ADVance key and
retype the new line.
3. To proofread a line while recording. push PAPER ADVance
key followed by (RECORD CONTROLI PRINT SWitch.
4. Additional editing techniques are described in the Opel dtOl'S
Manual.

ASR (UPPER UNIT) DEVICE SWITCH POSITIONS
MODEL 733 KSR/ASR USASCII CODE SYSTEM
DEVICE FUNCTION SWITCHES
ASR Switch Panel (Lower Row)
FUNCTION

KEYBOARD

PLAYBACK

RECORD

PRINTER

KEYBOARD
ON-LINE/OFF
SWITCH

TYPICAL ON-LINE CONFIGURATIONS

Record on tape from

Print from line only

Print and record on
tape from line

Play back to line only

Play back to line
and print out I

Keyboard to line
(no printout)

Keyboard to line,

OFF/LOCAL

line only (no printout)

record on taPtf,_and

PRINTABLE CHARACTER

PRINTER CONTROL CHARACTER

_.<"~~_'_ CODES GENER.ATED BY KEYBOARD,
~ BUT NO ACTION TAKEN

AUXILIARY DEVICE CONTROL CHARACTER

OFF/LOCAL

LINE

LINE'

OFF/LOCAL

ON-LINE

OFF/LOCAL

LINE'

ON-LINE

LINE'

ON-LINE

OFF/LOCAL

LINE

ON-LINE
LINE'

LINE
print l

ON-LINE
ON-LINE

LINE

LINE'

ON·LlNE

Transmit and r,eceive from

tapes to line si!i1'ultaneously3

LINE

Play back to li~e;
print from line

LINE

ON-LINE
LINE'

ON-LINE

TYPICAL LOCAL CONFIGURATION
(")

MODEL 732 KSR/ASR BAUDOT CODE AND CHARACTER SET
Bits

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

0
0
0
0
0
0
0
1
1
1
1
1
1
I
I
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1

0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1

0
1
1
0
0
1
1
0
0
I
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
I

1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
I
0
1
0
1
0
1
0
1
0
1
0
1

1
1
1

1
1
1
1
1
1
1
1
1
1
1
1
1

I
l

Nonprinting characters

Letters

U. S.&U.K.

I
I

F~ures

U.S.

U.K.

A
SPACE
S
I
U

SPACE

D
R

8
7

(

3.
4.

Play back to printer only

LOCAL

Duplicate tape
and print

LOCAL

LOCAL
LOCAL

LOCAL

OFF

LOCAL
LOCAL
LOCAL

LOCAL

Erase a tape

LINE: Keyboard to line
line to printer
LOCAL: duplicate a tape

LINE

LOCAL

LINE'

ON-LINE

LINE: playback \0 line
LOCAL: record on tape
from keyboard

LOCAL

LINE

LOCAL

ON-LINE

LOCAL

(

L
W
H

)

NOTES
HALF DUPLEX only; in FUl.,L DUPL~X, receive devices (recorder, printer) receive from line only.
In HALF DUPLEX, receive devices (recorder, printer) receive both transmitted '!nd received data (if any).
FULL DUPLEX only.

1.
2.
3.

6
0
1
9

WHERE A LINE/OFF/LOCAL POSITION IS LEFT BLANK IN ABOVE TABLE. THAT
SWITCH MAY BE IN ANY POSITION.

0
1
9

X
V

Record on tape
from keyboard

Y
P
Q
0

J
$

High-speed tape
duplication

TYPICAL SIMULTANEOUS LINE/LOCAL CONFIGURATIONS

F
C
K
T

;

siLENT 700
Electronic Data Terminals
MOD!:lS 732 AND 733 ASR QUICK REFERENCE CARD

NOTES

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