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MTM-15

RAD DATA COMMUNICATIONS

MTM-15

Modem Type

Data (synchronous/asynchronous)

Maximum Data Rate

19.2Kbps

Data Bus

External

Data Modulation Protocol

Proprietary

CONNECTIONS

Purpose

Location

Purpose

Location

RS-232/422

CN1

Digital loopback switch

DIG

DC power

CN2

Local loopback switch

ANA

Transmit

XMT

Remote digital loopback switch

REM

Receive

RCV

Test switch

PATT

Ground

GND

Reset

RESET

ANALOG LOOPBACK

Setting

JP3

Enabled

Pins 1 & 2 closed

Disabled

Pins 2 & 3 closed

ASYNCHRONOUS TO SYNCHRONOUS DEVIATION

Setting

SW2/S4

12.5%

Off

25%

On

BAUD RATE

Setting

SW1

1.2Kbps

0

2.4Kbps

1

4.8Kbps

2

9.6Kbps

3

19.2Kbps

4

BIT STOP

Setting

SW2/S2

SW2/S3

8 bits

Off

Off

9 bits

Off

On

10 bits

On

Off

11 bits

On

On

CD SIGNAL

Setting

JP2 Pin 1 & 2

JP2 Pin 3 & 4

CD normal

Open

Closed

CD forced high

Closed

Open

CHASSIS TO SIGNAL GROUND

Setting

JP5 Pin 1 & 2

JP5 Pin 3 & 4

Connected

Closed

Open

Disconnected

Open

Closed

CLOCK SOURCE

Setting

JP1/A

JP1/B

JP1/C

Internal

Closed

Open

Open

External

Open

Closed

Open

Receive

Open

Open

Closed

RECEIVE IMPEDANCE

Setting

JP8 Pin 1 & 2

JP8 Pin 3 & 4

600 Ohms

Closed

Open

High

Open

Closed

REMOTE LOOPBACK

Setting

JP4

SQ output

Pins 1 & 2 closed

Remote loopback

Pins 2 & 3 closed

SYNCHRONOUS/ASYNCHRONOUS SELECTOR

Setting

SW2/S1

Synchronous

On

Asynchronous

Off

TRANSMISSION LEVEL

Setting

JP6/A

JP6/B

JP6/C

JP6/D

JP6/E

0dBm

Closed

Open

Open

Open

Open

-3dBm

Open

Closed

Open

Open

Open

-6dBm

Open

Open

Closed

Open

Open

-9dBm

Open

Open

Open

Closed

Open

-12dBm

Open

Open

Open

Open

Closed

TRANSMIT IMPEDANCE

Setting

JP7 Pin 1 & 2

JP7 Pin 3 & 4

600 Ohms

Closed

Open

Low

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

SQ

Yellow

On

Good line quality

SQ

Yellow

Blinking

Poor line quality

SQ

Yellow

Dim

PATT test failed