First mic priority, Last Mic Mode, Gate Ratio | ClearOne comm AP400

Installation ~ LCD Programming

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Figure 2.9. PA Adaptive Mode

First mic priority

This feature helps maintain maximum audio intelligibility by allowing only one microphone to gate on when one person is speaking. ClearOne Communications recommends leaving this setting on. When turned off, usually two or more microphones gate on when only one person speaks. However, when this parameter is turned on, one person will usually be able to gate on only one microphone. First Mic Priority does this by determining the audio level received by all microphones when the first microphone is gated on. This audio level is then used as the ambient level for all other microphones. This mode can be turned on (default) or off by selecting the option and pressing Enter.

Last Mic Mode

There are three modes of last mic operation: last on, mic 1 and off. Last on leaves the last-activated microphone full on until another microphone input is gated on. Mic 1 allows the AP400 to revert back to a mic 1 input when all microphones gate off. The default setting for Last Mic Mode is off. To change a last mic mode option, select it, edit the value, and press Enter.

Gate Ratio

The gate ratio specifies how much louder the microphone audio level must be above the ambient level before a microphone gates on. Remember, this value is relative to the ambient level. If adaptive ambient mode is on, the actual on threshold changes as the ambient level changes. The adjustment range is from 0–50dB in 1dB increments. Default setting is 15. If microphones frequently gate on when no one is speaking, increase the gate ratio.

Technical Services Group ~ 1-800-283-5936 (USA) ~ 1-801-974-3760

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ClearOne comm AP400 operation manual First mic priority, Last Mic Mode, Gate Ratio

Contents

AP400 Audio Conferencing System AP400 Installation ClearOne Part No July 2002 Rev Iii Table of Contents Appendices AP-Ware SoftwareOperation Product Overview Introduction Features ClearOne Communications EuMEA GmbH Professional Services GroupSales and Customer Service Technical Support Front panel UnpackingControls and Connections Introduction ~ Controls and Connections Rear panel Link bus Link Network NOM Introduction ~ G-Link Networking BusLink EC Reference bus Control bus Technical Services Group ~ 1-800-283-5936 USA ~ Equipment Requirements AP400 installation diagram Hardware Setup To connect the AP400 Connecting the unitInstallation ~ Hardware Setup To create a G-Link network Installation ~ Networking UnitsNetworking Units Link connections Device types Mixer modeDevice IDs To set the device ID EC reference To set mixer modeErrors Menu trees Installation ~ LCD ProgrammingSwitching from one main menu category to another LCD Programming LCD menu tree Adjusting a value Set passcode Select presetSystem parameters Lock panel Gate parameters Mixer modeDevice ID Unit ID Gate Ratio Last Mic ModeFirst mic priority Hold Time Off Attenuation Combination Channels Decay RateManual Ambient To determine ambient level Installation ~ LCD Programming RS-232 Inputs Installation ~ LCD Programming TelcoInput parameters Chairman Mic Phantom PowerHigh-Pass Filter EQ Status Subbus Echo cancellerNLP adjust Inputs A-D, Telco Output 1-4, Output A-D, Telco Output parametersRouting parameters EC reference and PA Installation ~ LCD Programming SubbusLink X-Z buses Slave unit Link reference Inputs, Outputs, ERL/TERL, and ERLE/TERLE Default MeterMeter parameters Installation ~ Worksheet 64MB RAM DescriptionAP-Ware software requirements To install AP-Ware Installing AP-Ware Muting Controlling the volumeTo adjust the volume Front Panel Instructions Telco InterfaceTo make and disconnect a call To mute or unmute an output Operation ~ Controllers Other telco optionsControllers Custom control through DB-25 port Touch panel control Appendices Appendix a Specifications This 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 Control/Status port pinout Appendix C Connector PinoutsAppendices ~ Appendix C Connector Pinouts RS-232 COM DCE port pinout Accessory ClearOne Part Number Appendix D AccessoriesAppendix E Serial Commands Appendices ~ Appendix D Accessories Device Command SyntaxError Codes Mref Figure E.1. AP400 Serial Commands Appendices ~ Appendix E Serial Commands Return Values Serial Command Parameters ExplanationsAamb Explanation CH= A-D AGCDevice AD Device AGC CH Chairo AmblvlBaud BYE Dfltm DecayDial ERL Erle FPP FlowFMP Example GainExamples Microphone gating key Hook GmodeGratio Hold LVL HookdLFP LMO MEQ MasterMdmode Mline MHPMinit Input Input word assignment MmaxMpass Mtrx Return Values OutputmixOUTPUTMIXNote =NULL Mute NLPDevice Mute CH W Device NLP CH PAA NOMOffa Null Example Preset Refsel Preset Return Value RingRxrd Tamode Tout TerlTerle UID Figure F.1. Routing matrix worksheet Appendix F Worksheets Figure F.2. Programming worksheet Appendices ~ Appendix F Worksheets Figure F.3. Audio flow block diagram DSP Index Index ~ P-Z