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LDV-2

RAD DATA COMMUNICATIONS

LDV-2

Modem Type

Data (synchronous/asynchronous)

Maximum Data Rate

19.2Kbps

Data Bus

External

Data Modulation Protocol

Prorietary

CONNECTIONS

Purpose

Location

Purpose

Location

Line out

CN1

Digital loopback switch

DLB

Line in

CN2

Data clamp and loop 1 test switch

DC-L1

RS-232

CN3

Remote digital loopback switch

RLB

AC power

CN4

Fuse

FUSE

BAUD RATE

Setting

SW1

19.2Kbps

0

14.4Kbps

1

9600bps

2

7200bps

3

4800bps

4

3600bps

5

2400bps

6

1800bps

7

1200bps

8

900bps

9

CARRIER TRANSMISSION LEVEL

Setting

JP5/A

JP5/B

JP5/C

Long distance (-50dBm)

Closed

Open

Open

Medium distance (-40dBm)

Open

Closed

Open

Short distance (-30dBm)

Open

Open

Closed

CD SIGNAL

Setting

JP7/A

JP7/B

JP7/C

CD forced high.

Closed

Open

Open

CD follows RTS signal.

Open

Closed

Open

CD normal.

Open

Open

Closed

CENTRAL/REMOTE UNIT SELECTOR

Settings

JP1

Central unit

Pins 1 & 2 closed

Remote unit

Pins 2 & 3 closed

CHASSIS TO SIGNAL GROUND

Setting

JP8

Connected

Pins 2 & 3 closed

Disconnected

Pins 1 & 2 closed

CLOCK SOURCE

Setting

JP4/A

JP4/B

JP4/C

External

Closed

Open

Open

Internal

Open

Closed

Open

Receive

Open

Open

Closed

DATA CLAMP/LOOP1 TEST

Setting

JP10

Enabled

Pins 1 & 2 closed

Disabled

Pins 2 & 3 closed

ENABLES TEST PUSHBUTTONS

Setting

JP9

DLB, DC-L1, RLB enabled

Pins 1 & 2 closed

Disabled

Pins 2 & 3 closed

REMOTE LOOPACK

Setting

JP11

Enabled

Pins 1 & 2 closed

Disabled

Pins 2 & 3 closed

RTS/CTS DELAY

Setting

JP3/A

JP3/B

JP3/C

0 ms

Closed

Open

Open

8 ms

Open

Closed

Open

68 ms

Open

Open

Closed

SYNCHRONOUS/ASYNCHRONOUS SELECTOR

Settings

JP2

Synchronous

Pins 1 & 2 closed

Asynchronous

Pins 2 & 3 closed

TRANSMIT LEVEL

Remote/Central mode

JP6/A

JP6/B

JP6/C

0dBm/-6dBm

Closed

Open

Open

-3dBm/-9dBm

Open

Closed

Open

-6dBm/-12dBm

Open

Open

Closed

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

TEST

Red

On

Modem in test mode

TEST

Red

Off

Modem not in test mode