Telex 38109-977 manual Overview, Defining And Meeting Your Needs

C H A P T E R

3

DESIGN OF PARTY-LINE

INTERCOM SYSTEMS

STAN HUBLER

Overview

In this chapter, designing a system based on your needs is first approached by Defining And Meeting Your Needs. This topic is designed to help you choose or at least understand the system. IFB is described in The IFB System (One Way Communications System). Then Connecting (Interfacing) to Other Communications Systems discusses real world solutions to interfacing these systems. The Some Practical Considerations section discusses real world environments and some work-arounds. A Summary closes this chapter.

Defining And Meeting Your Needs

Your needs could include buying, renting, assembling or expanding a system. Application Block Diagrams are a good starting place to define a system. In this section, block diagrams of applications in each of the three leading systems will be shown and discussed. These diagrams will range from relatively simple to complex systems. One of these block diagrams could be close to what you need to know, give or take a station or so. If you make a copy of the diagram and mark it up, this could define your system.

Disclaimer The block diagrams are for instructional purposes, and though every effort has been for accuracy, the manufacturers offerings are often changing. It pays to double check with the manufacturer or rental house to verify the exact system available before buying or renting.

Application 1 Generic Single Channel Systems

The first applications are generic single channel systems, see Fig.1.3. They consist of a power supply, belt packs, headsets, splitter boxes, and microphone cables. These are systems that could be used in a small television studio production, a small outside television field production, or an industrial test of a large system. Depending on the detail of the block diagram, you may be able to compile an equipment list from this diagram.

C h a p t e r 3 - D e s i g n o f P a r t y - L i n e I n t e r c o m S y s t e m s 21