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Telex 38109-977 manual

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112 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 MatrixDetermining Intercom Needs Page Page List of Figures Wireless Intercom Interfaced to Matrix Intercom Preface Page About the Authors Page Introduction Party-Line SystemsWireless Systems Matrix SystemsAccessories Wireless Intercom ExamplesExample of Interfacing a TW System to a Matrix System Before We Begin MatrixRest Of The Book TallyTwo-Wire Some DefinitionsParty-Line PL systems / Conference Line Intercom Systems Short History Present Day Systems and Manufacturers Brand Name ManufacturerSystem Components and Their Function Belt Pack Headset User Station Functional Description Speaker User Station Functional Description Master StationsSome Technical Notes About The Stations Above How Each System Works Four pin XLRFive pin XLR System Powering Headset User StationsSpeaker User Stations Outstanding Features of Each System CablingCall Lights Some Definitions Limitations of Each SystemSummary Short HistorySystem Components and Their Function How Each System WorksOutstanding Features of Each System Limitations of Each SystemAudiocom intercom concept RTS TW intercom concept Overview Defining And Meeting Your NeedsApplication 1 Generic Single Channel Systems Audiocom Party-Line Intercom Equipment Listing #1 Generic single channel Audiocom systemClear-Com Party-Line Intercom Equipment Listing #1 Generic single channel Clear-ComsystemApplication 2 Two-Channel System TV, School, Cable RTS TW Party-Line Intercom Equipment Listing #1Audiocom Party-Line Equipment Listing #2 Clear-Com Party-Line Equipment Listing #2Application 3 Theater System RTS TW Party-Line Equipment Listing #2Audiocom Party-Line Equipment Listing #3 Clear-Com Party-Line Equipment Listing #3RTS TW Party-Line Equipment Listing #3 Application 4 Training Systems AudiocomClear-Com Clear-Combased training intercom systemRTS TW Application 5 Medium System for Television Medium intercom system for televisionStudio and Some Field Applications IFB System One Way Communications SystemHow an IFB Works Field Application, SportsConnecting Interfacing to Other Communications Systems Field Application, ENG Electronic News GatheringTypical Interfacing Problem Interfacing IssuesModes Level ProblemsSignal / Data Conversion Call LightProblems in Interfacing to Cameras Interfacing PracticeAlternatives for Interfacing to Television Cameras Some Practical Considerations Headset Cable LengthsExtended Range On Part Or All Of The System Wiring Practices/Workmanship StandardsHeadphone Impedances Unbalanced vs. BalancedCrosstalk Through a Mutual Capacitance Of Two Conductors Cable ConsiderationsCrosstalk Through a Common Circuit Ground Low Crosstalk Approach To InterconnectionTemperature Range Consideration System Current/System Capacitances/LoadingCooling Requirements Magnetic Fields Hum Problems Moisture / Contamination ProtectionDefining and Meeting Your Needs Connecting Interfacing to Other Communications Systems IFB System One Way Communications SystemSome Practical Considerations Page Page Introduction to Matrix Intercom Systems DefinitionsKP-32 is a good example of an advanced user station keypanel History of Matrix Intercoms Example of Matrix PortsX X X X X X Number of Users Number of Crosspoints Page Page Modern Day Matrix Intercoms Conventional Matrix vs. TDM MatrixAdvantages ConfigurabilitySpecial Considerations SizeAncillary Functions Conference or PL described aboveMore Complex Ancillary Functions Typical User Station KeypanelPage Disadvantages CostComplexity You are in your kitchen QUICK, multiply 347.2 times Page Page Back-to-Basics RTS Matrix Intercom SystemsTypical Adam Matrix Connections Studio a To BeginLet’s get started FloorControl Room OtherPage Page Cable Considerations RJ12 Modular PlugPolling Issues Audio and Data ConsiderationsVery 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 InterfacingInterconnecting Matrix, PL, and Wireless Systems TW and Matrix Signal Flows10 Wireless Intercom Interfaced to Matrix Intercom + + Software Considerations 12 TW to Matrix InterfaceAdam and Adam CS Basic Components Adam Page Introduction to Wireless Intercoms History of Wireless IntercomsPage Modern Day Wireless Intercoms First beltpack based wireless intercom systemAn 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 Interference2A B = C + C = D3A 2B = C 10 Transmitter block diagram Transmitters and Receivers11 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 OverviewSmall Studio or ENG Vehicle Determining Intercom Needs, two-wire, four-wire, or both?PS15 Power Supply/MCP2 Rack Kit MCE325 Modular Programmable StationTW5W Splitter Headsets and Earsets not shownMedium Sized Studio and Mobile Intercom IFB325 Talent User StationTwo-wire Case Medium Intercom 803-G1G5 Master StationSystem Interconnect PS31 Power SupplyBOP220 Connector Translation Assembly SAP1626 Source Assign PanelFour-wire Case Medium Intercom TIF-2000 Intelligent Telco Interface Zeus DSP2400 MatrixKP96-7 Keypanel MKP4-K Modular KeypanelSSA324 System-to-System Adapter IFB828 IFB Power SupplyPS15 Power Supply SAP612 Source Assign PanelLarge Studio or Mobile Vehicle Users Determining the Makeup of the Intercom MatrixFirst Step--Determine the Size IFB CircuitsSecond Step--Determine the Panels CamerasMiscellaneous Other Considerations in Determining Intercom Needs Expandability MaintenanceHow old is Too Old? InteroperabilityBudget 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