ClearOne comm AP400 operation manual Inputs A-D, Telco, Subbus, Echo canceller, NLP adjust, Gain

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Installation ~ LCD Programming

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Echo canceller

 

Activate or deactivate the echo cancellation feature for each gated input. Factory default is on.

NLP adjust

Non-linear processing (NLP) has four settings: soft (6 dB), medium (12dB), aggressive (18dB), and off. NLP adds additional echo cancelling “horsepower” to the echo canceller in difficult acoustic environments. Care should be taken when using NLP because of the corresponding trade-offs, which can include suppression and half-duplex operation. The factory default is soft.

Inputs A-D, Telco

The parameter submenus below this level control how inputs A, B, C, and D and Telco In deal with input audio. Three input parameters can be applied to the inputs: gain adjust, AGC and mute (see Figure 2.16).

Gain

This adjusts each input’s gain (ranging between -20dB and 20dB). In conjunction with the LCD readout and the LED bar graph, all gated inputs can be simply calibrated for the right level on the mix bus. The default setting is 0dB.

AGC

Each input can use automatic gain control (AGC). This feature keeps softer and louder input audio at a consistent level. This feature is disabled when shipped from the factory.

Mute

This parameter mutes a particular input channel.

Figure 2.16. Inputs A–D submenu

Subbus

The subbus parameter allows control of gain (attenuation) of mix audio from the microphones into the speaker audio. The attenuation can be adjusted in dB.

Gain

The subbus gain can be adjusted over a range of 0 to -20dB, in 1 dB increments. The default setting is -6dB.

Figure 2.17. Inputs A–D submenu

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Contents AP400 Audio Conferencing System AP400 Installation ClearOne Part No July 2002 Rev Iii Table of ContentsAppendices AP-Ware SoftwareOperation Product Overview IntroductionFeatures Sales and Customer Service Professional Services GroupTechnical Support ClearOne Communications EuMEA GmbHFront panel UnpackingControls and Connections Introduction ~ Controls and Connections Rear panelLink bus Link NetworkLink EC Reference bus Introduction ~ G-Link Networking BusControl bus NOMTechnical Services Group ~ 1-800-283-5936 USA ~ Equipment Requirements AP400 installation diagram Hardware SetupTo connect the AP400 Connecting the unitInstallation ~ Hardware Setup Networking Units Installation ~ Networking UnitsLink connections To create a G-Link networkDevice IDs Mixer modeTo set the device ID Device typesEC reference To set mixer modeErrors Switching from one main menu category to another Installation ~ LCD ProgrammingLCD Programming Menu treesLCD menu tree Adjusting a valueSystem parameters Select presetLock panel Set passcodeDevice ID Mixer modeUnit ID Gate parametersGate Ratio Last Mic ModeFirst mic priority Hold Time Off AttenuationManual Ambient Decay RateTo determine ambient level Combination ChannelsInstallation ~ LCD Programming RS-232 Inputs Installation ~ LCD Programming TelcoInput parameters High-Pass Filter Phantom PowerEQ Status Chairman MicNLP adjust Echo cancellerInputs A-D, Telco SubbusOutput 1-4, Output A-D, Telco Output parametersRouting parameters EC reference and PA Installation ~ LCD Programming SubbusLink X-Z buses Slave unit Link referenceInputs, Outputs, ERL/TERL, and ERLE/TERLE Default MeterMeter parameters Installation ~ Worksheet 64MB RAM DescriptionAP-Ware software requirements To install AP-Ware Installing AP-WareTo adjust the volume Controlling the volumeFront Panel MutingTo make and disconnect a call Telco InterfaceTo mute or unmute an output InstructionsControllers Other telco optionsCustom control through DB-25 port Operation ~ ControllersTouch panel control Appendices Appendix a SpecificationsThis warranty is void if Appendix B Warranty and ComplianceWarranty FCC Part 68 Compliance Appendices ~ Appendix B Warranty and ComplianceFCC Part 15 Compliance Industry Canada Compliance Safety Information Appendices ~ Appendix C Connector Pinouts Appendix C Connector PinoutsRS-232 COM DCE port pinout Control/Status port pinoutAppendix E Serial Commands Appendix D AccessoriesAppendices ~ Appendix D Accessories Accessory ClearOne Part NumberError Codes Command SyntaxMref DeviceFigure E.1. AP400 Serial Commands Appendices ~ Appendix E Serial CommandsAamb Serial Command Parameters ExplanationsExplanation Return ValuesDevice AD AGCDevice AGC CH CH= A-DBaud AmblvlBYE ChairoDfltm DecayDial ERL ErleFPP FlowFMP Examples GainMicrophone gating key ExampleGratio GmodeHold HookLFP HookdLMO LVLMEQ MasterMdmode Mline MHPMinit Mpass MmaxMtrx Input Input word assignmentReturn Values OutputmixOUTPUTMIXNote =NULL Mute NLPDevice Mute CH W Device NLP CH Offa NOMNull PAAExample Preset Refsel PresetRxrd RingTamode Return ValueTerle TerlUID ToutFigure F.1. Routing matrix worksheet Appendix F WorksheetsFigure F.2. Programming worksheet Appendices ~ Appendix F WorksheetsFigure F.3. Audio flow block diagram DSP IndexIndex ~ P-Z