RAD Data comm ASM-10/8 operation manual Features

ASM-10/8Installation and Operation Manual

Chapter 1. Introduction

EXT CLK

EXT CLK

V.54 DLY-ON

V.54 DLY-ON

ASM-10/8

ASM-10/8

RCV CLK

RCV CLK

V.54 DLY-OFF

V.54 DLY-OFF

ASM-10/8

ASM-10/8

Master

Slave

ASM-10/8

Slave

Figure 1-4 ASM-10/8 Star Application

Note

In the star application, set the XMT and RCV impedance of all the modems to

150W.

Features

The ASM-10/8 modem uses conditioned differential diphase modulation

(EUROCOM Std. D1) to provide protection from background noise,

eliminate normal line distortion and permit efficient transmission and

reception of serial data over twisted pair cable. ASM-10/8 is connected to

the telephone line through isolation transformers which, in conjunction with

electronic circuitry, protect the device against AC or DC voltage fluctuations.

The protection circuitry permits operation of ASM-10/8 even when DC is

connected to the line.

The modem's transmit level and transmit and receive impedances are

independently selectable. The transmit timing is either provided internally,

or it is derived externally from the data terminal or regenerated from the

receive signal. The modem's receive timing is regenerated from the receive

signal.