Telex 38109-977 guide

60 H a n d b o o k o f I n t e r c o m S y s t e m s E n g i n e e r i n g

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Telex 38109-977 manual

Contents

Handbook of Intercom Systems Engineering Fine Print Table of Contents Design of Party-Line Design of Wireless Introduction to Matrix Determining Intercom Needs Page Page List of Figures Wireless Intercom Interfaced to Matrix Intercom Preface Page About the Authors Page Introduction Party-Line Systems Wireless Systems Matrix Systems Accessories Wireless Intercom Examples Example of Interfacing a TW System to a Matrix System Before We Begin Matrix Rest Of The Book Tally Party-Line PL systems / Conference Line Intercom Systems Two-WireSome Definitions Short History Present Day Systems and Manufacturers Brand Name Manufacturer System Components and Their Function Belt Pack Headset User Station Functional Description Some Technical Notes About The Stations Above Speaker User Station Functional DescriptionMaster Stations Five pin XLR How Each System WorksFour pin XLR Speaker User Stations System PoweringHeadset User Stations Call Lights Outstanding Features of Each SystemCabling Some Definitions Limitations of Each SystemSummary Short History System Components and Their Function How Each System Works Outstanding Features of Each System Limitations of Each System Audiocom intercom concept RTS TW intercom concept Application 1 Generic Single Channel Systems OverviewDefining And Meeting Your Needs Audiocom Party-Line Intercom Equipment Listing #1 Generic single channel Audiocom system Clear-Com Party-Line Intercom Equipment Listing #1 Generic single channel Clear-Comsystem Application 2 Two-Channel System TV, School, Cable RTS TW Party-Line Intercom Equipment Listing #1 Audiocom Party-Line Equipment Listing #2 Clear-Com Party-Line Equipment Listing #2 Application 3 Theater System RTS TW Party-Line Equipment Listing #2 RTS TW Party-Line Equipment Listing #3 Audiocom Party-Line Equipment Listing #3Clear-Com Party-Line Equipment Listing #3 Application 4 Training Systems Audiocom Clear-Com Clear-Combased training intercom system RTS TW Application 5 Medium System for Television Medium intercom system for television Studio and Some Field Applications IFB System One Way Communications SystemHow an IFB Works Field Application, Sports Connecting Interfacing to Other Communications Systems Field Application, ENG Electronic News Gathering Typical Interfacing Problem Interfacing Issues Modes Level ProblemsSignal / Data Conversion Call Light Alternatives for Interfacing to Television Cameras Problems in Interfacing to CamerasInterfacing Practice Some Practical Considerations Headset Cable Lengths Extended Range On Part Or All Of The System Wiring Practices/Workmanship StandardsHeadphone Impedances Unbalanced vs. Balanced Crosstalk Through a Mutual Capacitance Of Two Conductors Cable ConsiderationsCrosstalk Through a Common Circuit Ground Low Crosstalk Approach To Interconnection Cooling Requirements Temperature Range ConsiderationSystem Current/System Capacitances/Loading Defining and Meeting Your Needs Magnetic Fields Hum ProblemsMoisture / Contamination Protection Some Practical Considerations Connecting Interfacing to Other Communications SystemsIFB System One Way Communications System Page Page Introduction to Matrix Intercom Systems Definitions KP-32 is a good example of an advanced user station keypanel History of Matrix Intercoms Example of Matrix Ports X X X X X X Number of Users Number of Crosspoints Page Page Modern Day Matrix Intercoms Conventional Matrix vs. TDM Matrix Advantages ConfigurabilitySpecial Considerations Size Ancillary Functions Conference or PL described above More Complex Ancillary Functions Typical User Station KeypanelPage Complexity DisadvantagesCost You are in your kitchen QUICK, multiply 347.2 times Page Page Back-to-Basics RTS Matrix Intercom Systems Typical Adam Matrix Connections Studio a To BeginLet’s get started Floor Control Room OtherPage Page Cable Considerations RJ12 Modular Plug Polling Issues Audio and Data Considerations Very Large Systems, Split Operation and Trunking A Comparison of Relative System Sizes Separate Studios, Separate Intercom Fixed Trunking Page Independent Matrices in 2 Studios Page Cascaded Trunking Signal Formats Interfacing Interconnecting Matrix, PL, and Wireless Systems TW and Matrix Signal Flows 10 Wireless Intercom Interfaced to Matrix Intercom + + Software Considerations 12 TW to Matrix Interface Adam and Adam CS Basic Components Adam Page Introduction to Wireless Intercoms History of Wireless IntercomsPage Modern Day Wireless Intercoms First beltpack based wireless intercom system An example of a modern day wireless intercom system Page Ntsc Channel Configuration Chan Start Video Chroma Audio Chan Start Video Chroma Audio Page Page Design of Wireless Intercom Systems Field An example of wireless transmission and reception An example of reflected RF waves Waves that are in phase combine to form a larger wave An example of combining waves that are not 180 out of phase Interference 3A 2B = C 2A B = C+ C = D 10 Transmitter block diagram Transmitters and Receivers 11 Receiver block diagram 12 Good linearity is a must for faithful signal reproduction Antenna & Cable Considerations Page 14 An example of a Yagi antenna Page Installation Coaxial Cable Loss ChartPage Page Page Determining Intercom Needs Conference Versus Point-to-Point RequirementsPage Fixed vs. Mobile Requirements General Overview Small Studio or ENG Vehicle Determining Intercom Needs, two-wire, four-wire, or both?PS15 Power Supply/MCP2 Rack Kit MCE325 Modular Programmable Station TW5W Splitter Headsets and Earsets not shownMedium Sized Studio and Mobile Intercom IFB325 Talent User Station Two-wire Case Medium Intercom 803-G1G5 Master Station System Interconnect PS31 Power SupplyBOP220 Connector Translation Assembly SAP1626 Source Assign Panel Four-wire Case Medium Intercom TIF-2000 Intelligent Telco Interface Zeus DSP2400 MatrixKP96-7 Keypanel MKP4-K Modular Keypanel SSA324 System-to-System Adapter IFB828 IFB Power SupplyPS15 Power Supply SAP612 Source Assign Panel Large Studio or Mobile Vehicle Users Determining the Makeup of the Intercom MatrixFirst Step--Determine the Size IFB Circuits Miscellaneous Second Step--Determine the PanelsCameras Other Considerations in Determining Intercom Needs Expandability MaintenanceHow old is Too Old? Interoperability Budget Glossary AWG O s s a r y CCU CPS Crosstalk Current Current Sources DSP EFP EIA GND Gpio Green Room Ground Ground Loop Potential Ibew IFB IR Drop Isolation Light Signaling Limiter Line Line Level Matrix Maximum SPL Mho Mic Micro µ Microcontroller NAB Nabet NEC Nema PLL PZM RFI RMS Smpte SPL O s s a r y Symbol for the unit of power, the watt Index IFB ISO STL VHF