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ASM-31

RAD DATA COMMUNICATIONS

ASM-31

Modem Type

Data (synchronous/asynchronous)

Maximum Data Rate

128Kbps

Data Bus

External

Data Modulation Protocol

Proprietary

CONNECTIONS

Purpose

Location

Purpose

Location

V.24, V.35, X.21, RS-530

CN1

Diagnostic test switch

DIG

AC power

CN2

Analog loopback switch

ANA

Ground

GND

Remote loopback switch

REM

Receive

RCV

Test pattern

PATT

Transmit

XMT

Reset switch

RESET

 

ANALOG LOOPBACK

Setting

JP2

» Enabled

Pins 2 & 3 closed

Disabled

Pins 1 & 2 closed

ASYNC TO SYNC

Setting

SW1/S1

» Synchronous

On

Asynchronous

Off

BAUD RATE

Setting

SW7

600bps

0

1200bps

1

2400bps

2

4800bps

3

9600bps

4

19.2Kbps

5

38.4Kbps

6

48Kbps

7

» 64Kbps

9

128Kbps

A

57.6Kbps

C

115.2Kbps

D

BIT

Setting

SW1/S2

» 8 bit

On

7 bit

Off

CD SIGNAL

Setting

SW1/S6

» CD forced high

On

CD normal

Off

CHASSIS TO SIGNAL GROUND

Setting

JP4

» Connected

Pins 1 & 2 closed

Disconnected

Pins 2 & 3 closed

CLOCK SOURCE

Setting

JP1/A

JP1/B

JP1/C

Loopback

Closed

Open

Open

» Internal

Open

Closed

Open

External

Open

Open

Closed

DSR/DTR

Setting

SW1/S7

» Power ON

On

DSR follows DTR

Off

PARITY - ON/OFF

Setting

SW1/S3

» Enabled

On

Disabled

Off

PARITY - EVEN/ODD

Setting

SW1/S4

» Even

On

Odd

Off

REMOTE LOOPBACK

Setting

JP3

» Enabled

Pins 2 & 3 closed

Disabled

Pins 1 & 2 closed

STOP BIT

Setting

SW1/S5

» 1 stop bit

On

2 stop bit

Off

DIAGNOSTIC LED(S)

LED

Color

Status

Condition

PWR

Green

On

Power is on

PWR

Green

Off

Power is off

RTS

Yellow

On

Request to Send enabled

RTS

Yellow

Off

Request to Send disabled

TD

Yellow

On

Modem is transmitting steady SPACE

TD

Yellow

Off

Modem is not transmitting data

TD

Yellow

Blinking

Modem is transmitting data

RD

Yellow

On

Modem is receiving steady SPACE

RD

Yellow

Off

Modem is not receiving data

RD

Yellow

Blinking

Modem is receiving data

DCD

Yellow

On

Carrier signal detected

DCD

Yellow

Off

Carrier signal not detected

LOS

Red

On

Loss of synchronization

LOS

Red

Off

Synchronization ‘OK’

ERR

Red

On

Errors in test pattern

ERR

Red

Off

Good test pattern

TEST

Yellow

On

Modem in test mode

TEST

Yellow

Off

Modem not in test mode