Crown 137769-3 Wiring, Analog, Digital and Auxiliary Inputs, Speech Mic, speech DBm/dBV

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DBC Network Bridge

3Setup

3.3Wiring

Chapter 1 describes how to make connections to the DBC Network Bridge. The information below describes the connections in detail.

3.3.1 Analog, Digital and Auxiliary Inputs

Analog Line Input: DB25 female connector accepts eight balanced ana- log line-level analog inputs. Pinout matches Dolby CP-650 analog output. See Table 2 on page 5.

Digital Audio Input: DB25 female connector accepts eight AES3 digital audio signals. Pinout matches Dolby #778 AES input/output card for CP- 650. See Table 1 on page 5.

Auxiliary Inputs: Two female XLR balanced inputs for speech reinforce- ment or announcements (see Figure 3.2).

Each input has an input selector switch.

•Slide it to the left (M) for microphone signal levels up to +7dBu (0dBu = 0.775 volts).

•Select the center position (L) for line-level signals up to +20 dBu.

•Slide it to the right (P) to provide 24VDC to mics requiring phantom power.

Each input has a screwdriver-set, calibrated gain control to compensate for different input source levels. The slot on the control shaft points to the gain setting. The settings are labeled for line-level input. Add 25 dB to the scale if the inputs are switched for microphone level signals.

Use a screwdriver to adjust the gain pot so that the input signal level plus gain equals roughly 0dBu. You will need to know, or estimate, the level of the input source. Setting the source signal level to approximately 0dBu will provide 20dBu of headroom in the input preamp. Some recommended set- tings are given in Table 4.

Figure 3.2 Aux Input Level Controls, XLR connectors and

Mic/Line/Phantom Slide Switch

 

Pro Audio Equip-

Semi-Pro or con-

Dynamic mic,

Condenser mic,

Hot condenser

 

ment

sumer equipment

speech

speech

mic, speech

 

 

 

 

 

 

dBm/dBV

+4 dBm

–10 dBV

–75 dBV

–65 dBV

–45 dBV

(nominal)

 

 

 

 

 

 

 

 

 

 

 

dBu (nominal)

+4 dBu

–8 dBu

–73 dBu

–63 dBu

–43 dBu

 

 

 

 

 

 

Suggested Setting

–4 (L)

+8 (L)

+20 (M)

+18 (P)

+11 (P)

 

 

 

 

 

 

Table 4. Suggested Audio Input Gain Control Settings

0 dBm = 0.775 Vrms with a 600-ohm load. 0 dBV = 1 Vrms.

0 dBu = 0.775 Vrms.

Operation Manual

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Contents Some models may be exported under the name Amcron DBC Network BridgeUse only with a cart, stand, tripod, bracket, or Important Safety InstructionsEuropean Representatives Name and Address Safety StandardEquipment Type Digital B-Chain EMC StandardsAudio and Network Connections Please refer to Figures 1.1 Getting Started With the DBC Network BridgeDBC DB25F Digital AES/EBU Pinouts 3 TCP/IQ Addressing Rules IntroductionSelecting Settings Control Panel 4 TCP/IQ SetupInternal Properties Window 5 TCP/IQ Addressing Worksheet Example of AN IQ Addressing Worksheet2C. Close the software. Repeat as necessary 11 The Discovery Screen 14 The Unit Presets Window Table of Contents Welcome FeaturesHow to Use This Manual 3CREEN #HANNELS#ANDA3UBWOOFERS Connecting to AC Mains SetupUnpack and Install Your DBC Network Bridge Analog, Digital and Auxiliary Inputs WiringDynamic mic Condenser mic Hot condenser Ment Speech Mic, speech DBm/dBVBalanced Monitor Output Wiring Balanced Input WiringUnbalanced Input Wiring Control Port Connections Unbalanced Monitor Output WiringCobraNet Connections Operation Primary Network Connector Back Panel Controls and Connectors IEC AC Power InletSecondary Network Connector Monitor Out ConnectorLCD Control Screen shows SceneMenu Tree Operation ExamplesOperation Example IQwic Overview Presets and ScenesPC Requirements System OverviewMetering Preset InformationOutput Level Meters Input Level MetersGeneral Tab LED Display ModeReal Time Clock Front Panel Control Lock OutSurround Per-Channel Signal Processing Signal Path Tab, Cinema Surround FormBooth Monitor Source Select Basic Processing FunctionsOn/Off Input CompressorCompression Ratio ThresholdSignal Path window Input DelayDelay Settings Channel SelectEQ Filters Frequency, Gain and Q SettingsAdd Button Frequency Response GraphFrequency Select Field Show Magnitude/PhaseFrequency Slider Combined ResponsesMaster fader works like this All Outputs Volume Controls13 Signal Generator Window Signal GeneratorCobraNet Explanation 14 CobraNet Output Window CobraNet OutputMute Button Input Selector Buttons Level SliderPolarity Button DBC Outputs Meters CobraNet Bundle/Channel SelectorPreset Segue PresetsPreset Options Notice Standard Cinema Preset Button PresetPreset Name Preset EditorPreset Control Window Preset Select Buttons18 Scenes Window ScenesScene Scene EditorControls Named20 Events Scheduler Window Events SchedulerSchedule One Time EventsPeriodic Events Memory Backup General Firmware Features Input Level MetersInput Dynamic Cut/Boost Meters Output Dynamic Cut/Boost MetersAdvanced Operation Advanced Operation Table of ContentsSystem Description System NameSystem Location System ContactStatus indicators CobraNet SetupIP Address ConductorCobraNet Input Window CobraNet InputControl Port Window Control PortControl Port Window Digital Inputs Pin State IndicatorEdit Buttons PinAdd / Remove Buttons Recall PresetObject List Set ObjectsCondition Control Port Condition Logic Setup WindowName IncludeReflect Preset Output State Pin State IndicatorControl Port Window Digital Outputs Section ManualControl Port Window Analog Outputs Section Control Port Window Analog Inputs Section AINInput Delay Input Gate Auto Level Settings Advanced Form Firmware FeaturesOutput Path Same as Output Delay Input Path Input Level/Polarity/Mute same asInput Signal Fader, Muter, and Inverter Input Select SwitchInput Path Input Selector19 Input Delay Window Hardware DelaysDepth Signal DelayStatic Threshold HysteresisTarget Level Auto-LevelerMax Gain Idle GainPriority Ducking AutomixerAutomix Controls Ambience WeightingPriority Depth of Cut24 Automix Matrix Window Automix MatrixHighest Open Mic Priority Indicator Priority Mix EnableEnable Automixing Group ControlsAmbient Level Meter Adaptive GatingGroup Gate Threshold Ambient Offset Automix Group27 Solo/Mute Window Solo/MuteOutput EQ Filters Output PathOutput Processing Sections Sense Delay Program Level Dependent ModeAmbient Leveler Expansion RatioFour parameters control this feature 32 Outputs Window Outputs ButtonAudio Input Section Technical DescriptionDSP Processing Section Output SectionAdditional Error Checking TroubleshootingCondition Both LEDs flashing Advanced Signal Path Window with Preset-32 Icons Enabled Specifications Required AC Mains AC Line Connector 15A IEC AC power inletGlossary Appendix a TCP-IQ Network BasicsTCP/IQ Network Basics Component firmware upgrades via the networkMultiple Network Communication Via an IP Router 1Fast Ethernet 100Base-T Closer Look at CobraNetAudio Specs Switched NetworksBundles and Audio Channels Repeater NetworksService United States & Canada WarrantyWorldwide Except USA & Canada Credit card information Crown Audio Factory Service InformationDBC Network Bridge

137769-3 specifications

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