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Polycom EF2241 manual Global Settings, Automixer, Decay Hold Time Camera Gating Threshold

Models: EF2241

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Global Settings

LCD MENU STRUCTURE

THRESHOLD, MANUAL THRESHOLD, and GATE PRIORITY.

Signal Level

Channel turns on when
signal level is above
signal level is above
Adaptive Threshold
					DECAY
						TIME
Channel ON
Channel ON

ADAPTIVE THRESHOLD		Microphone		HOLD
ADAPTIVE THRESHOLD		Audio		TIME
Channel OFF		Audio		TIME
Channel OFF
Ambient Level

OFF ATTENUATION

Time

Automixer

Global Settings

Decay

Hold Time

Camera Gating

Threshold

Figure 22. Automixer parameters.

Global Settings.

Decay Time. Decay time is the amount of time the microphone audio takes to ramp down to the Off Attenuation level after Hold Time. Decay Time values range from 0 to 5000 msec. The default value is 1000 msec.

Hold Time. This is the amount of time the microphone stays On after the energy in the channel drops below the gating threshold. The default value is 500 msec. The range is 1 to 5000 msec. 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 while too many microphones gating on at the same time may be the result of Hold Time values that are too high.

Camera Gating Threshold. Specifies the hold time for camera gating informa- tion.

VORTEX EF2241 Reference Manual

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Technical Support: 800.932.2774

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Polycom EF2241 manual Global Settings, Automixer, Decay Hold Time Camera Gating Threshold

Contents

Vortex EF2241 Reference Manual Page Introduction Welcome How to Use This Manual INTRODUCTIONProduct Registration PRODUCT FEATURESProduct Inputs and Outputs Remote Control What’s Included PRE-INSTALLATIONTools Needed for Installation What’s Not IncludedEF2241 FRONT AND REAR PANELS 10. INPUT PARALLEL PORT. Parallel logic input Recommendation For Easy Access INSTALLATIONCONNECTING THE EF2241 TO OTHER EQUIPMENT Instructions for Securing Power Supply to Back of EF2241Typical EF2241 Connections DEVICE IDS ON THE EF BUS CONNECTING MULTIPLE VORTEX DEVICESNote. The EF Bus must be connected so that the EF Bus In of one FACTORY DEFAULT SETTINGS PRESET Terminating the EF2241VORTEX EF2241 Reference Manual INSTALLATIONPreset Technical SupportPick a Standard Signal Level Presets and Multiple Vortex DevicesCHECK SURROUNDING EQUIPMENT Configure the matrix mixer input from the codec output. The input Configure Program Audio SourcesINTEGRATING THE EF2241 INTO YOUR SYSTEM INPUT SETTINGSSelect Phantom Power for Inputs CALIBRATIONSet Levels on Line Input Channels ADJUST THE INPUT GAIN IN THIS WAYIF THE AGC METER SHOWS ECHO CANCELLER REFERENCE FOR MULTIPLE VORTEX DEVICES SET UP THE PHONE INTERFACEBUILD YOUR ECHO CANCELLER REFERENCE Customize Setting for Your Particular ApplicationVortex device Setting up theBus Reference If all far end audio and program audio sources are on the sameCONFIGURE THE AUTOMATIC MICROPHONE MIXER Automixer ParametersGlobal Settings Mixer SettingsAUTOMIXER SETTINGS FOR MULTIPLE VORTEX DEVICES Channel SettingsDefault Settings CONFIGURE THE MATRIX MIXERAutomixer and Bus Mixer Settings Operating as an Independent BUILDING YOUR SYSTEM WITH MULTIPLE VORTEX DEVICES3. Configure the submatrix 1. Assign Inputs 2. Assign OutputsTHE EF BUS THE EF BUS4. Configure Your Echo Canceller Reference PRESETSOTHER EF2241 FEATURES THE EF BUSLCD MENU STRUCTURE LCD Menu Treemust be flashing. To make the parameter flash assuming the front panel is not locked press ENTER. Once the parameter is flashing, use the UP and DOWN buttons to adjust the parameter value. The parameter is instantly updated while it is being adjusted - you should hear changes as the parameter is changing. RS-232 control strings are also sent via the RS-232 port so your remote control device is instanta- neously updated as well. Press ENTER to select and store the parameter value or press ESC to cancel the selected value and return to the old value. Pressing HOME has the effect of pressing ESC then HOME, so the selected value will be cancelled and the menu will return to the top of the menu tree SYSTEM MENU Figure 17. EF2241PHONE CONTROL INPUTS Automatic Gain Control Inputs 1-4, T. This enables automatic gain conFigure 19. EF2241 Global Settings Mixer Settings Channel Settings OUTPUTSAUTOMIXER MENU OutputsAutomixer Global SettingsGlobal Settings Decay Hold Time Camera Gating ThresholdMixer Settings AM1/AM2 Bus ID Chairman Mode Chairman Mic Mixer SettingsChannel Settings Last Mic On Mode Last Mic Number Local Max NOM Global Max NOMMain Matrix MATRIX MENUMatrix SubMatrixPARAMETRIC EQ MENU Input/Output EQ Channel BandPresets MACROSPRESETS Figure 25. EF2241No microphones are gating Some microphones are not gating TROUBLESHOOTINGAUTOMATIC MICROPHONE MIXER Too many microphones are gatingRESIDUAL ECHO ECHO CANCELLER REFERENCEMATRIX MIXER Room Audio Sounds ChoppyFinding the Source of Echo Room Gain Excessive Room Gain Figure 28. Room GainIn-Conference Quick Check Excessive Microphone Amplification Amplification InsufficientMicrophone NonlinearityCONTACTING TECHNICAL SUPPORT Email vortex@polycom.comELECTRICAL SPECIFICATIONS TECHNICAL SPECIFICATIONSMECHANICAL SPECIFICATIONS PERFORMANCE SPECIFICATIONSUSA and Canada COMPLIANCEUS Telco requirements Automatic Dialing Telco Connector Canadian Telco RequirementsInstallation Instructions AustraliaMains powered POT’s Voice Telephony without Emergency 000 dialing Rest of WorldVORTEX EF2241 Reference Manual TECHNICAL SPECIFICATIONSThis page was intentionally left blank Technical SupportKonformitetserklæring CE Mark R& TTE DirectiveDeclaration of Conformity KonformitätserklärungVORTEX EF2241 Reference Manual Technical SupportNoise and Reverberation Consider Room Gain CONFERENCE SYSTEM DESIGNFigure 29. Room Gain EN Echo Canceller, Noise Canceller EF2241 BLOCK DIAGRAMEF2241 BLOCK DIAGRAM V ORTEX EF2241 Reference ManualCat-5 Plug Pinout CONNECTOR PINOUTSEF Bus RJ11 Plug PinoutPower Supply Input Input/Output Remote Control PortMic/Line Inputs, Line Inputs, Line Outputs Instructions CONNECTING UNBALANCED RCA TO BALANCED MINI PHOENIXMAKING AN EF BUS TERMINATOR 1 2 3 4 5 6 7ADDITIONAL NOTES What is covered For how long What we will do Limitations WARRANTY INFORMATIONWhat we ask you to do State Law Rights What this warranty does not coverNo User Serviceable Parts Acoustic Echo Echo CancellerDEFINITION OF TERMS Acoustic Gain Ambient Level Automatic Gain Control AGCEF Bus Equalization Line Echo Macros Matrix Mixer Noise Cancellation NOM NOM Attenuation NOM Bus Presets Room Gainroom gain of this microphone channel is said to be 0 dB. If the reflected signal picked up by the microphone is higher than the level of the signal sent to the line output to your amplifier, that microphone channel has positive room gain. The more positive the room gain, the harder the AEC must work to determine which signal is an echo and which is a local speech signal INDEX Mic/Line Inputs, Line Inputs, Line Outputs Page Page 1720 Peachtree Street NW, Suite 220 Atlanta, GA Polycom, Inc Installed Voice Business Group1725-80098-001-C Phone 800 932-2774, 404