RAD Data comm ASM-10/8 Especificações descarregar pdf (Página 19)

ASM-10/8 Installation and Operation Manual Chapter 1 Introduction

Overview 1-3

ASM-10/8

Master

ASM-10/8

Slave

ASM-10/8

Slave

ASM-10/8

Slave

Figure 1-4. Star Application

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

150

Ω

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.

ASM-10/8 communicates over lines in synchronous mode only. When set to the

asynchronous mode, ASM-10/8 performs an asynchronous to synchronous

conversion in compliance with ITU V.14 bis standard.

The unit has line protection circuits against lightning and power surges.

ASM-10/8 also operates in conjunction with the MCS-10 dual modem card of the

MCS-12 Monitoring and Control System.

The ASM-10/8/R card is capable of sensing and indicating power failure on the

remote ASM-10/8 standalone unit. When this feature is enabled, the RPF LED

lights in case of a remote power failure.

Note

1 2 ... 14 15 16 17 18 19 20 21 22 23 24 ... 55 56

Sem comentários

RAD Data comm ASM-10/8 Especificações Página 19