Sampling Rate | Telos ZephyrExpress specification

•L2 JOINT (Joint Stereo) mode uses the “intensity coding” method in order to provide maximum quality for stereo program material. Delay is also compensated to preserve phase.

Sampling Rate

This option sets the sample rate for the transmitted and received coded audio. Input/output is independent and is set in the AES menus. The Layer 3 mode may be operated at either 48 kHz or 32 kHz sample rate.

48 kHz offers lower delay and 20 kHz audio bandwidth. However, the 32 kHz rate is generally preferred for broadcast applications because no bits are wasted on frequencies above 15 kHz – which are usually not transmitted in analog broadcasting, anyway.

Layer 2 primarily operates at 48kHz sample rate. However, the L2 HALF/24 modes allow operation at 24kHz when this sample rate is desired, primarily when communicating with “single line” capable Layer 2 codecs.

5-14 CODING

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Telos ZephyrExpress user manual Sampling Rate

Contents

UserÕs Manual Manual Version 1.0 / April What youÕve got here Customer Service Feedback ZephyrExpress will dial a test line for you Blank Screen?Test Lines Updates Power SupplyWarranty Trademarks Repairs Table of Contents Troubleshooting Schematics and Data Sheets AppendixIsdn Reference System Functions Introduction H i c t Block Diagram Menu Structure Utility Menu Quick Results Tune into one of our test lines Part Quick Results Gather information about your Isdn line MSN numbers, i f supplied Euro ETS300 only Isdn type, check oneIsdn telephone numbers with area code Set up the hardware Quick Results HConfigure ZephyrExpress for your Isdn line Quick Results Call yourself testing your unit and the line Configure the Codec HOT TIP Set up an audio input and output Place the call to yourself Quick Results Tune into one of our test lines Isdn TIP Fast Answers to Frequently-Asked Questions He BasicsWhat do I do if IÕm totally lost? Knob either direction to change the LCD Contrast How do I use the menus? Scrollbar Highlighted How do I use a menu that appears locked? How do I lock a specific menu?How do I enter numbers or names? Right H6 How do I create my own Setups and Master Setups? HOT TIP How do I manually enter a network setup? How do I test that IÕve set things up properly? Alternate test procedure What do I do if I canÕt connect? Audio setup How do I set ZephyrExpress for my microphones? How do I use line-level sources? How do I test my audio and compression setups? How do I create a monitor mix? Isdn Connection How do I place a call? What do I do if they canÕt hear me? HHOT TIP How do I send a test tone? How do I hang up? Where do I find answers to other questions? Circuit information · 1-4 coding methods · Quick Results Zephyrexpress Hardware About our hardware Front Panel Mixer Section Send Mixer Monitor Mixers Level Controls Lock LEDs Display sectionSend and Receive Meters LCD Display Control section Edit knob Dial button Drop button Rear Panel Isdn Connections Mode switchesData connection section Interface Pinouts Remote Control jacks Line C Top pin RS-232 Pinouts Parallel PortInputs Output 12 N/C Input 15 N/C Outputs About the XLR ConnectorsAudio i/o section All XLR Pinouts Microphone InputsZephyrExpress Ground Audio + Line Inputs Conductor Input plugMonitor 1 XLR outputs Direct Isdn Receive outputs Power connection Power Supply JackMonitor 1, Monitor 2 Headphone outputs Headphone Jacks +5Vdc @ 5A +12Vdc @ 1.5A 12Vdc @ .5A System Ground Power InputPower Supply XLR Output Zephyrexpress Hardware Zephyrexpress Hardware Audio Operations Console at your fingertips Mix flexibility Send Mixer Routing Beware the Phantom Mic Routing Switches Compression, will make any perceptual coder less efficient Line Routing Switch GainRouting, convert the mic inputs to line-level Bold Face Front Panel Hardware Send Level Controls Send Meters Monitor Routing Switches Monitor MixersReceive Meters Send About Monitor Panning Adjusting individual monitor panning Monitor 1 Send Receive Meters Lock lights Analog call signal routing Analog G.711 phone callsReceiving calls Talkback and cues can cut the cost of remote broadcasts Placing calls Hanging up Phones and Remotes Dealing with DelayMix-Minus Remote Site Audio Operations Layer 3 Features Compatibility Overview Introduction to Audio Coding Basic Principles of Perceptual Coding Coding Layer 3 Features Psychoacoustic Masking Redundancy Reduction Bit Reservoir BufferingAncillary Data Bands Layer 3 Joint Stereo Layer 2 Mono-128 722Layer 2 Joint Stereo Cascading Mixed Mpeg Layer 2 And Layer 3 Signal Chains Audio Coding Comparison Chart Algorithm Audio Freq. Response/monoAudio Freq. Response/stereo Layer 722 Delay vs. Quality Dual vs Stereo vs Joint Stereo in LayerWith one transmission path With two transmission paths Dual Site Operation Layer 2 Mono64kpbs vs MONO128 Dual vs JstereoWith one transmission path With two transmission paths Sampling Rate With Non-Telos Equipment CompatibilityBetween Telos Codecs Coding Coding Menu Overview Autodial SetupsCodec menu Audio menu Isdn menu System menu Safe mode menu Menu System Typical menu Navigation Shortcuts Getting Help Weõre not Fortune Tellers Menu Overview Utility Menu Creating or Changing a Setup Using SetupsApplying a Setup Master Setups Applying a Master Setup Creating or Changing a Master Setup Auto-creating a new Master Setup Deleting a Master Setup Manually creating a Master SetupUpdating an existing Master Setup Editing or deleting an Autodial Autodial SetupsCreating a new Autodial Menu Details Codec menu Isdn TIP Audio menu See , Audio 75 dB @ 100 Hz -10 dB @ 40 Hz Isdn menu Directory Number 7 digits System menu Seconds Minute Minutes Minutes Never Safe mode menu Menus ZephyrExpress Isdn Compatibility Ordering Central Office Switches and ProtocolsBackground Basic Rate Interface BRI Isdn Basics Background Basic Rate Interface BRI Isdn TIP Spids Get the SPIDs Get the SPIDs Directory Numbers DNs Long-Distance Digital Connectivity Switch carriers Dealing with The Phone Company Details, Details CSD and CSV ZephyrExpress Isdn Compatibility ProtocolsNT1s Terminals and Terminal Types Ordering Central Office Switches and Protocols1 National ISDN-1 USA and Canada Zephyrexpress Settings for YOU to Enter AT&T Point-to-Point Custom USA, Japan, Israel, some others Zephyr Settings for YOU to Enter AT&T Point-to-Multipoint Custom Euro-ISDN Europe, Hong Kong, some others Isdn System Functions Software Updates Introduction ZephyrExpress data ports Serial Port Pin CommunicatingPin Ground Security Levels Hello, ZephyrExpress Command Help Login user ¶ Command Language Details Compatibility Note Display current encoder input & decoder Kept Times # for decimal numbers Parallel Port Ground, the call is dropped System Functions Troubleshooting First Steps Thinking About Problem Solving General Troubleshooting Diagnostic Aids Other IdeasLook into the Lights Front-panel LEDs TheyÕre disconnected during Far Loopback mode Far Loopback for local audio testingLoopback modes NT1 status LED Block diagram of the audio circuitry during Far Loopback Near Loopback for codec testing Loopback Summary OperationFar Loopback from the distant studio Some Error Conditions No functionality the box is totally or partly dead Condition Isdn Connecting OK, But No Audio Site B, but works perfectly when site B calls site a Condition Audio Distorted Condition No Audio In Both DirectionsCondition Audio In One Direction Only Isdn Problems Error MessagesCondition Major Echo Action Condition CanÕt Get Isdn Ready Ready Indication Ready when the switch type is set to PTP, and you cannot Dial, itÕs likely that your line is really National ISDN-11 Really Important Isdn TIP Can you place a pots call? What does the Isdn Cause phrase say? Intermittent Isdn Problems Isdn Cause Phrases/Values Cause No No route to destination. Prefix 1 dialed in error Cause No Check number, redialCause No No route to network Cause No No prefix Cause No No far end response Cause No No answerCause No Call rejected Cause No Number changed Cause No Net problem, redial Cause No Access information discardedCause No No circuit available Cause No Net out of order Cause No Service operation violated Cause No Resource unavailableCause No Requested facility not subscribed Cause No Incompatible bearcap Cause No Invalid information element contents Cause No Timeout disconnectCause No Protocol Error, Unspecified Cause No Message type nonexistent or not implemented Troubleshooting Schematics Appendix ÒNominalÓ Levels Level, Gain, dBu and dBm Codec Compatibility Information CCS Comrex Intraplex Comprehensive ZephyrExpress Compatibility List DialogYouCom CCS CDQ1000 CCS CDQ2000 CCS CDQ2001CCS Prima Comrex Layer-II DX-200 PKI G.722 phone PKI MagicPhilips MPR LIIBlue Philips MPR Baby Blue Telos World Wide Web site Audiobahn WWW PaperDigifon List WWW Phone EdNet List of Known Working SPIDs by Telephone Company Northern Pittsburgh Tele- phone NynexPacific Bell Southwestern Bell Ordering Isdn Company Telephone Number Worldwide WEB IOC Capability Packages Protocols 56/64kbps SPIDsCSD and CSV Long Distance Carriers NT1sTerminals and Terminal Types Faxable Isdn Order Form for use in US only Faxable Isdn BRI Line Order Form Page 1 From Location for line CO Values Protocol National ISDN-1Protocol AT&T Point-to-Point Custom Protocol AT&T Point-to-Multipoint Custom Protocol Northern Telecom DMS100 ÔFunctionalÕ Custom, PVC1Give us Not supported by ZephyrExpress Appendix