Commodore CBM8010 Operator's Manual

CBM8010

IEEE

488 COMPATIBLE

MODEM

OPERATOR'S

MANUAL

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1

CBM

8010

MODEM

MANUAL

INTRODUCTION

We sincerely

appreciate

your

selection

of

Commodore's

acoustically

coupled

originate

and answer

IEEE 488

compatible

8010

modem. The CBM 8010

is

compatible with the Bell

103 and

113

modems

for

use in the United States

and

with

V.21

specifications

for

use

in

CCITT

countries.

In addition to being compatible

with the IEEE

488 interface, it

also

conforms

to

the International Electro-technical

Committee

(lEC) specifications

for

programmable

instrumentation.

INSPECTION

AND INSTALLATION

Your

new

CBM

8010 was originally

shipped

in

a carefully designed container.

When

you remove

the unit, inspect

the

exterior

carefully for any signs

of

shipping

damage.

We

recommend that

shipping

materials

be retained for

inspection

by

the shipping

carrier

in case of

shipping damage,

or for

reshipment should return to

Commodore

be

necessaiy

.

If

there is no apparent shipping

damage,

malie

sure the power

is off and

connect

the AC

adaptor to the

CBM

8010

and to

a source of AC

power

(115

V

AC

-

US,

230 V AC

-

CCITT).

Connect the IEEE

488

compatible

connector to

the 24-pin

connector on the back

of the

modem.

SWITCHES

OR. OFF.

AN The

8010

is designed to function

as

either

an ORiginating

or

ANswering

acoustically coupled modem. For

teleprocessing

applications

when the

originate mode is desired,

the OR.

OFF.

AN

switch

should

be switched

to the OR

position.

For

termLaal-to-terminal

communications when

the

answer

mode is

desired,

the

OR.

OFF.

AN

switch should

be

switched to the

AN

position.

To turn

the

8010

's power off,

the

OR.

OFF.

AN

switch

should be switched

to the

OFF

position.

FD.TST.HD

The

CBM

8010

may

be

operated

in

either

the

Full

Duplex

or

Half

Duplex

mode. When the half

duplex

mode

is

desired

(e.g. , for self

testing the

system),

the

FD.TST.HD

switch

should

be

switched

to

the HD position.

The half

duplex mode

allows

computer/terminal

data

to

be

transmitted

at the same time

that

data is echoed back through

the

interface

for

display

by the local terminal.

This

mode is generally not

required

on

488

compatible

terminals

and computers,

b'jt

the feature

is

available

for both

diagnostic

testing

as

well as local copy

presentation, should

it be

desired.

In the normal mode of

operation,

full

duplex is

selected

and

the

FD.

TST.HD

switch should be

switched to the

FD

position.

The

full

duplex

mode

allows

data to

be

transmitted

simultaneously

with

the

receipt

of

data from

the

remote

modem.

To

activate

the

self-test

mode to verify

that the

coupler

and

terminal

are

functioning properly,

the

FD. TST.HD

switch

should

be

switched

to

the

TST

position

(see

"TROUBLESHOOTING").

INDICATORS

TST TST

indicates

that the

CBM8010

is operating

in

the

self-test

mode.

CRX

CRX

indicates that the carrier

from

the

remote

modem

has

been

received

and

the

CBM8010

is ready for

teleprocessing.

RCV RCV

indicates that data is

being

received. RCV is

on

during

the receipt

of

a

SPACE

signal

and

extinguishes

upon

the

receipt of a

MARK or

when

no

carrier

is

being

received.

XMT

The

XMT

indicator

serves a

dual

purpose in

the

CBM

8010

modem.

During

the

time that the modem

is off

line,

the

XMT

light is

illuminated

indicating

that the

power is on to the

modem.

As soon as

the

modem is

activated

on

line and

the CRX

light is

illuminated, the

XMT

mdicator

turns

off and

then

follows

the

MARK/SPACE

condition in

the

normal

convention.

That is, the

XMT light is

on

during a

SPACE

condition

of the

local

terminal and

is off

when a

MARK is

being

transmitted.

OPERATION

A data

communications

link

requires that one

station

transmit and receive in

the

originate

mode

and

the other

receive and

transmit in the

answer

mode.

If both

stations

are in

the

same

mode, a

data

communications

Imk cannot

be

established

(see

SPECIFICATIONS

for precise

transmit and

receive

frequencies).

When

communicating

with a

time-share

computer,

the

CBM 8010

should be in the

originate

mode as

the

modem

at the

computer end

will

be

in

the answer mode.

When

communicating

with

another

terminal,

agreement

on

the mode

of operation

is made

prior

to

data

exchange.

ORIGINATE

MODE

1.

Ensure

that the

terminal

power is

on and

is ready

for

remote

operation.

2. Switch

the CBM

8010

to the

ORiginate

mode.

The XMT

indicator

will

turn on

indicating

power is on

.

3. The

CBM

8010 should

be

switched to the

Full Duplex

mode

for

most normal

communications.

However, in the event

that

your

computer/terminal

is

programmed

so

that

it does not

display

characters locally

as

they are typed,

the

Half

Duplex mode

allows

characters

to

be

echoed back

through

the