Polycom EF2241 manual Mixer Settings

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LCD MENU STRUCTURE

Automixer

Mixer Settings

(AM1/AM2)

Bus ID

Chairman Mode

Chairman Mic

Last Mic On Mode

Last Mic Number

Local Max NOM

Global Max NOM

Off Attenuation

Automixer Reference

Reference Bias

Automixer

Channel Settings

(Inputs 1-4)

Automixer

Threshold Type

Gating Mode

Adaptive Threshold

Manual Threshold

Gate Priority

Mixer Settings.

Bus Mixer. This command is used to assign one of the two internal automixers to one of the EF Bus automixer groups. For example, consider three Vortex devices each of which has 2 microphones assigned to Automixer 1 and 2 micro- phones assigned to Automixer 2. Now, if each of these devices sets their Auto- mixer 1 to have Bus Mixer 5, then the three automixers (one from each device) will work as a single automixer containing 6 (3 x 2) microphones. Setting Bus Mixer to 0 means that the automixer is not grouped on the EF Bus.

Chairman Mode. Enables or disables Chairman Mode for the specified auto- mixer.

Chairman Mic. Sets the Chairman Microphone for the specified automixer. Last Mic On Mode. Sets “Last Mic On” mode for the specified automixer. Last Mic Number. Sets the microphone number that will remain on when “Last Mic On” mode is set to manual. Setting this value to 0 will cause the automixer to leave the last open microphone on. The last microphone number is specified for each automixer, but is only used in manual “Last Mic On” mode.

Local Max NOM. Sets the maximum number of open microphones (NOM) limit for the specified automixer. This NOM limit is a “local” limit, meaning that this limit applies only to the specific Vortex device that it is set on.

Global Max NOM. Sets the global maximum number of open microphones (NOM) limit for each linked automixer. The maximum value for this command is 64. This NOM limit is a “global” limit, meaning that this limit applies to all linked automixers with the same Bus ID.

Off Attenuation. Sets the Off Attenuation (in dB) for the specified automixer. Setting this value to 18 would result in the microphone signals being attenuated by 18 dB when gated off. This value is set independently for each of the auto- mixers.

Automixer Reference. When enabled, the echo canceller reference becomes a muted input in the automix so that far end audio coming from the speakers does not gate on local microphones.

Reference Bias. Adjusts how much gain is applied to the Automixer Reference signal. The higher the gain, the harder it will for local talkers to gate on a micro- phone.

Channel Settings.

Automixer (Inputs 1-4).This allows you to select which automatic microphone mixer (1 or 2) a particular microphone channel is assigned to. A microphone may only be assigned to automatic mixer 1, automatic mixer 2, or neither (but not both).

Threshold Type. Sets automatic (also referred to as adaptive) or manual auto- matic gating thresholds per input.

Gating Mode. Sets the automixer gating control mode for specified input chan- nel. The possible modes are Normal Gating, Microphone Forced On, or Micro- phone Forced Off.

Adaptive Threshold. This is also referred to as the Adaptive Threshold. This allows you to determine when to gate a microphone on based on an estimate of the background noise level. The default value is to gate a channel on if it is more than 10 dB louder than the background noise level. Values range from 0 to 100 dB. To set the adaptive threshold, scroll through the adaptive threshold range and select the desired adaptive threshold by pressing ENTER.

Manual Threshold. Sets the automixer gating threshold for the specified input channel. This value is only used if the input set to Manual Gating via the THRESHOLD TYPE option.

© Polycom, Inc.

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VORTEX EF2241 Reference Manual

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Contents Vortex EF2241 Reference Manual Page Introduction Introduction Welcome How to Use This ManualProduct Product FeaturesProduct Registration 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 Check Surrounding Equipment Presets Multiple Vortex DevicesPick a Standard Signal Level Configure Program Audio Sources Calibration Input SettingsIntegrating the EF2241 Into Your System 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 DevicesBuilding Your System with Multiple Vortex Devices Configure the Matrix MixerDefault Settings Assign Inputs Assign Outputs Configure the submatrixEF BUS Configure Your Echo Canceller Reference PresetsOther EF2241 Features 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 US Telco requirements ComplianceUSA and Canada 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 Instructions Connecting Unbalanced RCA to Balanced Mini PhoenixMaking AN EF BUS Terminator 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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