Polycom EF2241 manual Troubleshooting, Automatic Microphone Mixer, Too many microphones are gating

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TROUBLESHOOTING

TROUBLESHOOTING

AUTOMATIC MICROPHONE MIXER

No microphones are gating

Some microphones are not gating

•Check if the microphones are muted.

•Are microphones part of one of the 2 automixers?

•Check if the microphones are assigned to an automixer.

•Check if the microphones are muted.

•Check microphone levels. Are microphones set to the appropriate mic or line level? Is phantom power on where needed?

•The Hold Time may be too low. Microphone channels gating On and Off too fre- quently during short pauses in speech might be the result of setting the Hold Time too low.

•Check Gating settings. Are microphones Forced Off?

•Is Chairman Mode on? If you have assigned a Chairman Mic, all other micro- phones will gate Off once this microphone gates on.

•Check Gating Priority. If your inputs have a Gating Priority of 4, the micro- phones may not gate as frequently.

•Check Maximum Number of Open Microphones. This parameter sets the num- ber of open microphones allowed at any time. If this parameter is set too low, the microphones may not gate as often as you wish.

•Adjust the Adaptive Threshold if the Gate Threshold is set to Adaptive or adjust the Manual Threshold if the Gate Threshold is set to Manual. For Adaptive Gate Threshold, set the Adaptive Threshold lower so that the microphone will gate On when lower level signals are present at the microphone. For Manual Gate Threshold, set the Manual Threshold to a lower absolute threshold.

Too many microphones are gating

•The Hold Time might be too high. Too many microphones gating on at the same time may be the result of Hold Time values that are too high.

•Assign a Chairman Mic. This will cause all other microphones to gate Off once this microphone gates on and will prevent too many microphones from gating.

•Set Gating Priority so that not all microphones have the same priority. The default value for each input is a Gating Priority of 1, which is the highest priority.

•Adjust the Adaptive Threshold if the Gate Threshold is set to Adaptive or adjust the Manual Threshold if the Gate Threshold is set to Manual. For Adaptive Gate Threshold, set the Adaptive Threshold higher so that the microphone will gate when only louder signals are present at the microphone. For Manual Gate Threshold, set the Manual Threshold to a higher absolute threshold.

•Using the Adaptive Gate Threshold is recommended for more accurate gating.

© Polycom, Inc.

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VORTEX EF2241 Reference Manual

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Page 38 Page 40
Contents Vortex EF2241 Reference Manual Page Introduction Introduction Welcome How to Use This ManualProduct Features Product RegistrationProduct Inputs Outputs Remote Control What’s Not Included PRE-INSTALLATIONTools Needed for Installation What’s IncludedEF2241 Front and Rear Panels PRE-INSTALLATION North American Requirement InstallationConnecting the EF2241 to Other Equipment Mounting the EF2241Codec Typical EF2241 ConnectionsDevice IDS on the EF BUS Connecting Multiple Vortex DevicesTerminating the EF2241 Factory Default Settings PresetOff Presets Multiple Vortex Devices Pick a Standard Signal LevelCheck Surrounding Equipment Configure Program Audio Sources Input Settings Integrating the EF2241 Into Your SystemCalibration Set Levels on Line Input Channels Customize Setting for Your Particular Application SET UP the Phone InterfaceBuild Your Echo Canceller Reference Echo Canceller Reference for Multiple Vortex DevicesBus Reference Setting upAutomixer Parameters Configure the Automatic Microphone MixerGlobal Settings Channel Settings Automixer Settings for Multiple Vortex DevicesConfigure the Matrix Mixer Default SettingsBuilding Your System with Multiple Vortex Devices Assign Inputs Assign Outputs Configure the submatrixEF BUS Presets Other EF2241 FeaturesConfigure Your Echo Canceller Reference LCD Menu Tree LCD Menu StructureLCD Menu Structure System System MenuPhone Control Phone ControlInputs 1-4, T, A-D InputsAutomixer Menu OutputsGlobal Settings Mixer Settings Matrix Matrix MenuInput/Output EQ Channel Band Parametric EQ MenuMacros PresetsToo many microphones are gating TroubleshootingAutomatic Microphone Mixer No microphones are gating Some microphones are not gatingRoom Audio Sounds Choppy Echo Canceller ReferenceMatrix Mixer Residual EchoFinding the Source of Echo Room Gain Room Gain Excessive Room GainIn-Conference Quick Check Excessive Microphone Amplification Nonlinearity InsufficientEmail vortex@polycom.com Contacting Technical SupportTechnical Specifications Compliance USA and CanadaUS Telco requirements Canadian Telco Requirements Automatic Dialing Telco ConnectorRest of World AustraliaThis page was intentionally left blank CE Mark R& TTE Directive Vortex EF2241 Reference Manual Technical Support Noise and Reverberation Consider Room Gain Conference System DesignEN Echo Canceller, Noise Canceller EF2241 Block DiagramEF Bus Connector PinoutsInput/Output Remote Control Port Connecting Unbalanced RCA to Balanced Mini Phoenix Making AN EF BUS TerminatorInstructions Additional Notes RMA# Must be on package Warranty InformationState Law Rights What this warranty does not coverCrosspoint Mix Minus Bus Echo CancellerDefinition of Terms Acoustic EchoNOM NOM Attenuation NOM Bus Presets Room GainDefinition of Terms Index NOM Index Page 1725-80098-001-C
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