Crown 137769-3 operation manual CobraNet Explanation

Page 34

4 Operation

4.7.7 CobraNet: Explanation

In the Signal Path window, Cinema Surround form, is a DBC Network Channel Assign button which opens the CobraNet Output window (described on the next page). If you need to understand how CobraNet works, please read the following section.

CobraNet is a technology developed by Peak Audio, Inc. that allows real time digital audio to be distributed over standard Fast (100Mb) Ethernet hardware. CobraNet allows the DBC Network Bridge to not only have ana- log or digital inputs, but also to provide 8 digital Inputs and 8 digital Out- puts from a CobraNet network.These additional Inputs and Outputs allow enhanced routing and processing capabilities, including the passing of audio channels to other DBC Network Bridges to create larger mixing and processing structures.

Transmission of digital audio via CobraNet is accomplished through 'Bun- dles' and 'Slots'. Bundles are Ethernet packets that contain up to eight dig- ital audio channels, called 'Slots'. Each digital audio channel is assigned a position (1-8) within the Bundle, hence the name Slot. The Bundle is then assigned a unique number that indicates how it will be transmitted on the CobraNet network. A receiver merely needs to select the Bundle number to receive the audio.

Bundles can be either multicast or unicast. Multicast bundles are sent to all CobraNet network devices, while unicast bundles are sent to one, and only one, CobraNet network device. Through the use of Fast Ethernet switches, unicast transmission of bundles can greatly increase the number of bun- dles that can be present on a CobraNet network since the bundles only go to the device that is addressed. Since each device can send and receive four bundles (i.e. up to 32 channels), great flexibility is allowed in the routing of audio over the network. Assignment of bundles as multicast or unicast is done through the assignment of the bundle number. Bundles with numbers 1-255 are always multicast, while bundles 256-65,279 are designated as unicast. Bundle assignments need to be unique, with only one CobraNet transmitter allowed per bundle.

The coordination, i.e. clock master, of the CobraNet network is the function of the 'Conductor'. The ‘Conductor Priority’ is set in each device and decides which unit will be the Conductor. If the Conductor is removed from the CobraNet network for any reason, the remaining devices decide who becomes the Conductor based on a numerical hierarchy, i.e. priority ‘0’=never and ‘255’=always.The PS-8810 is set as ‘32’ as a default.

DBC Network Bridge

The Conductor is responsible for ensuring that all devices on the CobraNet network transmit their bundles in a coordinated way. The Conductor recog- nizes each device on the network and assigns a transmission position for each bundle of each device.

In addition the Conductor sends master clock to each device to ensure that all audio is synchronous. Like a conductor of an orchestra, the Conductor signals the beginning of a synchronous transmission cycle, and then each device sends its bundle(s) in lock step. This occurs 750 times a second, with each audio channel having 64 samples of 48KHz audio. Each audio channel can be sent as 16, 20, or 24 bit samples. if 24bit audio is used then a bundle will be reduced to 7 channels. There is a fixed latency of 5.33ms.

CobraNet networks utilize Fast (100Mb) Ethernet hardware and can use either repeater hubs or switches. A repeater hub is a device that takes the data that comes into each port, and sends it back out on all ports except the port it came in on. As a result, only multicast bundles can be used in repeater hub networks and these need to be limited to 8 bundles per net- work.

On the other hand, switches are much more efficient, in that they examine the destination address of each packet of data received on each port, then switch that data to the particular recipient of that packet. Unicast bundles exploit this feature to minimize the audio traffic on the CobraNet network. The result is that an almost limitless number of unicast bundles can be on a switched CobraNet network. Multicast bundles are allowed on a switched network, but they must be used with care.

Peak recommends that not more than four multicast bundles be used in a switched CobraNet network. Peak also advise not to mix ordinary computer data on a repeater hub network, as this could result in dropout in the audio. In switched CobraNet networks, coexistence of CobraNet audio and ordi- nary computer data is possible, because there are no collisions with the audio.

If there are only two DBC Network Bridge units involved in a CobraNet net- work these can be connected using CAT 5 crossover cables.

More information:

www.peakaudio.com

www.iqaudiosystems.com

CobraNet is a registered trademark of Peak Audio, Inc.

page 34

Operation Manual

Page 33 Page 35
Image 34
Page 33 Page 35
Contents DBC Network Bridge Some models may be exported under the name AmcronImportant Safety Instructions Use only with a cart, stand, tripod, bracket, orEquipment Type Digital B-Chain Safety StandardEuropean Representatives Name and Address EMC StandardsGetting Started With the DBC Network Bridge Audio and Network Connections Please refer to Figures 1.1DBC DB25F Digital AES/EBU Pinouts Introduction 3 TCP/IQ Addressing Rules4 TCP/IQ Setup Selecting Settings Control PanelInternal Properties Window Example of AN IQ Addressing Worksheet 5 TCP/IQ Addressing Worksheet2C. Close the software. Repeat as necessary 11 The Discovery Screen 14 The Unit Presets Window Table of Contents How to Use This Manual FeaturesWelcome 3CREEN #HANNELS#ANDA3UBWOOFERS Unpack and Install Your DBC Network Bridge SetupConnecting to AC Mains Dynamic mic Condenser mic Hot condenser Ment WiringAnalog, Digital and Auxiliary Inputs Speech Mic, speech DBm/dBVUnbalanced Input Wiring Balanced Input WiringBalanced Monitor Output Wiring CobraNet Connections Unbalanced Monitor Output WiringControl Port Connections Operation Secondary Network Connector Back Panel Controls and Connectors IEC AC Power InletPrimary Network Connector Monitor Out ConnectorScene LCD Control Screen showsOperation Example Operation ExamplesMenu Tree PC Requirements Presets and ScenesIQwic Overview System OverviewOutput Level Meters Preset InformationMetering Input Level MetersReal Time Clock LED Display ModeGeneral Tab Front Panel Control Lock OutBooth Monitor Source Select Signal Path Tab, Cinema Surround FormSurround Per-Channel Signal Processing Basic Processing FunctionsCompression Ratio Input CompressorOn/Off ThresholdDelay Settings Input DelaySignal Path window Channel SelectAdd Button Frequency, Gain and Q SettingsEQ Filters Frequency Response GraphFrequency Slider Show Magnitude/PhaseFrequency Select Field Combined ResponsesAll Outputs Volume Controls Master fader works like thisSignal Generator 13 Signal Generator WindowCobraNet Explanation CobraNet Output 14 CobraNet Output WindowPolarity Button Input Selector Buttons Level SliderMute Button DBC Outputs Meters CobraNet Bundle/Channel SelectorPreset Options Notice PresetsPreset Segue Standard Cinema Preset Button PresetPreset Control Window Preset EditorPreset Name Preset Select ButtonsScenes 18 Scenes WindowControls Scene EditorScene NamedEvents Scheduler 20 Events Scheduler WindowPeriodic Events One Time EventsSchedule Input Dynamic Cut/Boost Meters General Firmware Features Input Level MetersMemory Backup Output Dynamic Cut/Boost MetersAdvanced Operation Table of Contents Advanced OperationSystem Location System NameSystem Description System ContactIP Address CobraNet SetupStatus indicators ConductorCobraNet Input CobraNet Input WindowControl Port Control Port WindowEdit Buttons Pin State IndicatorControl Port Window Digital Inputs PinObject List Recall PresetAdd / Remove Buttons Set ObjectsName Control Port Condition Logic Setup WindowCondition IncludeControl Port Window Digital Outputs Section Output State Pin State IndicatorReflect Preset ManualControl Port Window Analog Inputs Section AIN Control Port Window Analog Outputs SectionOutput Path Same as Output Delay Advanced Form Firmware FeaturesInput Delay Input Gate Auto Level Settings Input Path Input Level/Polarity/Mute same asInput Path Input Select SwitchInput Signal Fader, Muter, and Inverter Input SelectorHardware Delays 19 Input Delay WindowStatic Threshold Signal DelayDepth HysteresisMax Gain Auto-LevelerTarget Level Idle GainAutomixer Priority DuckingPriority Ambience WeightingAutomix Controls Depth of CutAutomix Matrix 24 Automix Matrix WindowEnable Priority Mix EnableHighest Open Mic Priority Indicator Automixing Group ControlsGroup Gate Threshold Ambient Offset Adaptive GatingAmbient Level Meter Automix GroupSolo/Mute 27 Solo/Mute WindowOutput Processing Sections Output PathOutput EQ Filters Ambient Leveler Program Level Dependent ModeSense Delay Expansion RatioFour parameters control this feature Outputs Button 32 Outputs WindowDSP Processing Section Technical DescriptionAudio Input Section Output SectionTroubleshooting Additional Error CheckingCondition Both LEDs flashing Advanced Signal Path Window with Preset-32 Icons Enabled Specifications AC Line Connector 15A IEC AC power inlet Required AC MainsAppendix a TCP-IQ Network Basics GlossaryComponent firmware upgrades via the network TCP/IQ Network BasicsMultiple Network Communication Via an IP Router Closer Look at CobraNet 1Fast Ethernet 100Base-TBundles and Audio Channels Switched NetworksAudio Specs Repeater NetworksService Warranty United States & CanadaWorldwide Except USA & Canada Crown Audio Factory Service Information Credit card informationDBC Network Bridge

137769-3 specifications

Crown 137769-3 is a state-of-the-art electric forklift designed to meet the demands of modern material handling and warehouse operations. Known for its robust performance and advanced technology, this model is favored by businesses seeking efficiency and reliability.

One of the standout features of the Crown 137769-3 is its exceptional lifting capacity. With the ability to lift heavy loads with ease, it is perfect for high-capacity warehouses and industrial environments. The forklift also boasts an impressive lifting height, allowing for the stacking of goods in high racks, maximizing vertical space and optimizing storage solutions.

The ergonomics of the Crown 137769-3 are meticulously designed to enhance operator comfort and productivity. The spacious operator compartment offers ample legroom and an adjustable seat, reducing fatigue during long shifts. Additionally, the intuitive controls and clear visibility contribute to a safer and more efficient working environment, minimizing the risk of accidents.

Crown’s innovative technologies are at the forefront of the 137769-3's appeal. It features the Crown Engineered Reliability (Crown ER) system, which ensures that critical components are built to last, significantly reducing maintenance needs and downtime. The integrated monitoring system provides real-time data on performance, vehicle status, and battery life, enabling managers to optimize operations effectively.

Another key technology featured in this model is the smart traction control system, designed to provide enhanced stability and control, particularly in uneven terrains. This feature is essential for preventing tip-overs and ensuring the safety of both the operator and the loads being transported.

The Crown 137769-3 is powered by long-lasting batteries that offer impressive run times, allowing for extended usage without frequent recharging. This efficiency helps businesses maximize productivity while minimizing energy costs.

In summary, the Crown 137769-3 combines impressive lifting capabilities, advanced ergonomics, robust technology, and energy efficiency, making it an ideal choice for any warehouse operation. Its reliability, safety features, and user-friendly design contribute to a seamless operational experience, ensuring that businesses can keep pace with the demands of modern logistics and distribution. This model stands out as an excellent investment for companies striving for excellence in material handling.
Top Page Image Contents