Polycom EF2241 manual Product Features, Product Registration

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INTRODUCTION

Product Registration

busses equals 12 inputs), and 2 mixes of the P Bus for the telephone. The 23 x 17 main matrix has the following outputs: Outputs 1-4 and A-D, AEC Reference 1 and 2, W, X, Y, and Z outputs to the digital expansion bus, P output to the digital expansion bus, output to the power amplifier, and output to the phone line. The EF2241 has 24 bit resolution, 32-bit floating point computation, and a 48 kHz sampling rate.

Polycom’s proprietary noise cancellation on each of the 4 mic/line inputs and the tele- phone line helps to keep overall ambient noise to a minimum. Polycom echo cancel- lers are the only ones on the market to feature this patented technology. Noise cancellation filters out ambient background noise such as noise from heating, venti- lating and air conditioning (HVAC), LCD projectors, and road noise. Our noise can- cellation technology is not a noise gate. It actually removes noise. Therefore, it enhances the operation and improves the sound quality of an automixer, for example, by preventing it from bringing the noise level up and down when microphones are gated on and off. By cancelling the noise picked up by each microphone, the overall signal to noise ratio (SNR) is preserved. The result is crystal clear speech over a greater decibel range than any other echo canceller. That means reduced listener fatigue and a higher quality audio conference.

Please take a moment to fill out and return your registration card. This information will help us to provide you with better customer support and will allow us to notify you with updated product features and software.

PRODUCT FEATURES

Product

•

Front panel LCD for controlling and configuring the product without a computer

 

• 5-band equalizer on all Inputs and Outputs

 

• Echo cancellation on Inputs 1-4

 

• Noise cancellation up to 15 dB

 

• Two internal automatic microphone mixers for Inputs 1-4

 

• 23 x 17 full cross point matrix mixer with expansion bus

 

• Internal signal generator for calibration mode and noise masking applications

 

•

2 year warranty

AEC

•

24 bit resolution

 

• 48 kHz sampling rate, >20 kHz bandwidth

 

• 270 ms AEC tail length

 

• 40 dB/sec convergence rate

 

• Can function in rooms with more than 10 dB of room gain

LEC

•

32 ms LEC tail length

• 40 dB/sec convergence rate

• > 65 dB total cancellation

© 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 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 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 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 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 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 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 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
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