Polycom EF2241 manual Parametric EQ Menu, Input/Output EQ Channel Band

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LCD MENU STRUCTURE

PARAMETRIC EQ MENU

Parametric EQ

Input/Output EQ

Channel

Band

Filter Type

Frequency

Bandwidth

Gain

Slope

Filter Enable

Figure 24. EF2241 Parametric EQ sub- menu

The input equalizer is comprised of up to 5 bands of filtering. The whole group of fil- ters for the channel can also be enabled/disabled without losing the settings for each band. For each band, you first select the type of filter from the following: Parametric/ Peaking, High Shelf, Low Shelf, Lowpass, or Highpass.

Parametric/Peaking.

•Center Frequency: in Hz, between 20 Hz and 20,000 Hz in 1 Hz steps.

•Bandwidth: in octaves, between 0.05 and 2 octaves in 0.05 octave steps.

•Gain: in dB, between -20 and +20 in 1 dB steps.

High Shelf.

•Center Frequency: in Hz, between 20 Hz and 20,000 Hz in 1 Hz steps.

•Bandwidth: in dB/octave, between 1 and 24 dB/octave, but is always less than or equal to 1.2 x Gain.

•Gain: in dB between -20 and +20 in 1 dB steps.

Low Shelf.

•Center Frequency: in Hz, between 20 Hz and 20,000 Hz in 1 Hz steps.

•Bandwidth: in dB/octave, between 1 and 24 dB/octave, but is always less than or equal to 1.2 x Gain.

•Gain: in dB between -20 and +20 in 1 dB steps.

Lowpass.

•Cutoff Frequency: in Hz, between 20 Hz and 20,000 Hz in 1 Hz steps.

Highpass.

•Cutoff Frequency: in Hz, between 20 Hz and 20,000 Hz in 1 Hz steps. Center frequency on Parametric/Peaking is the point with the most (or least) gain. Bandwidth is the width halfway up the peak (so if the peak is 10 dB, it is the width between the points where the gain is 5 dB).

Center frequency on shelving filters is the frequency where it crosses the point half- way between 0 dB and the gain of the filter, halfway up the slope.

© 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 Registration Product FeaturesProduct Inputs Outputs Remote Control Tools Needed for Installation PRE-INSTALLATIONWhat’s Included What’s Not IncludedEF2241 Front and Rear Panels PRE-INSTALLATION Connecting the EF2241 to Other Equipment InstallationMounting the EF2241 North American RequirementCodec Typical EF2241 ConnectionsDevice IDS on the EF BUS Connecting Multiple Vortex DevicesTerminating the EF2241 Factory Default Settings PresetOff Pick a Standard Signal Level Presets Multiple Vortex DevicesCheck Surrounding Equipment Configure Program Audio Sources Integrating the EF2241 Into Your System Input SettingsCalibration Set Levels on Line Input Channels Build Your Echo Canceller Reference SET UP the Phone InterfaceEcho Canceller Reference for Multiple Vortex Devices Customize Setting for Your Particular ApplicationBus Reference Setting upAutomixer Parameters Configure the Automatic Microphone MixerGlobal Settings Channel Settings Automixer Settings for Multiple Vortex DevicesDefault Settings Configure the Matrix MixerBuilding Your System with Multiple Vortex Devices Assign Inputs Assign Outputs Configure the submatrixEF BUS Other EF2241 Features PresetsConfigure 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 PresetsAutomatic Microphone Mixer TroubleshootingNo microphones are gating Some microphones are not gating Too many microphones are gatingMatrix Mixer Echo Canceller ReferenceResidual Echo Room Audio Sounds ChoppyFinding 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 USA and Canada ComplianceUS 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 Making AN EF BUS Terminator Connecting Unbalanced RCA to Balanced Mini PhoenixInstructions Additional Notes RMA# Must be on package Warranty InformationState Law Rights What this warranty does not coverDefinition of Terms Echo CancellerAcoustic Echo Crosspoint Mix Minus BusNOM NOM Attenuation NOM Bus Presets Room GainDefinition of Terms Index NOM Index Page 1725-80098-001-C