Polycom EF2241 manual Configure Program Audio Sources

Page 16

INSTALLATION

Configure the matrix mixer input from the codec output. The input

gain of the matrix mixer should be set to match the nominal output level of the codec. For example, if the codec outputs a -10 dBV (-8 dBu) level, 8 dB of gain should be applied on the matrix mixer input. This will bring the codec level up to 0 dBu inside the matrix.

Verify Room Gain After adjusting the loudspeaker level, verify the room gain in your system using the ROOM GAIN meter on the DIAGNOSTICS page of Conference Composer. The Room Gain measurement is only accurate when just the remote talkers are speaking. If local talkers are speaking too, the room gain meters are not accurate. See Figure 8 below. The meter shows the room gain, which is the relative level of the output level and the input level. While the EF2241 will operate in positive room gain conditions, the room gain should be around 0 dB or a negative value. If you have a positive room gain, make adjustments in the following areas:

1.Decrease the Input Gain of the microphone.

2.Decrease the Output Gain of the microphone.

3.OR adjust the placement of the microphone relative to the loudspeaker.

Room Gain Meter

Read Room Gain from here

Configure

Program Audio

Sources

Figure 8. Room Gain Meter on the Diagnostics page of the Conference Composer control software.

Set the gains on the matrix mixer inputs from the program audio sources so that pro- gram audio is played into the room at a level similar to that of speech from the remote site. This should also ensure that the program audio levels are good when sent to the remote site.

VORTEX EF2241 Reference Manual

14

Technical Support: 800.932.2774

Image 16

Contents Vortex EF2241 Reference Manual Page Introduction Welcome How to Use This Manual IntroductionProduct Registration Product FeaturesProduct Inputs Outputs Remote Control PRE-INSTALLATION Tools Needed for InstallationWhat’s Included What’s Not IncludedEF2241 Front and Rear Panels PRE-INSTALLATION Installation Connecting the EF2241 to Other EquipmentMounting the EF2241 North American RequirementTypical EF2241 Connections CodecConnecting Multiple Vortex Devices Device IDS on the EF BUSFactory Default Settings Preset Terminating the EF2241Off 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 SET UP the Phone Interface Build Your Echo Canceller ReferenceEcho Canceller Reference for Multiple Vortex Devices Customize Setting for Your Particular ApplicationSetting up Bus ReferenceConfigure the Automatic Microphone Mixer Automixer ParametersGlobal Settings Automixer Settings for Multiple Vortex Devices Channel SettingsDefault Settings Configure the Matrix MixerBuilding Your System with Multiple Vortex Devices Configure the submatrix Assign Inputs Assign OutputsEF BUS Other EF2241 Features PresetsConfigure Your Echo Canceller Reference LCD Menu Structure LCD Menu TreeLCD Menu Structure System Menu SystemPhone Control Phone ControlInputs Inputs 1-4, T, A-DOutputs Automixer MenuGlobal Settings Mixer Settings Matrix Menu MatrixParametric EQ Menu Input/Output EQ Channel BandPresets MacrosTroubleshooting Automatic Microphone MixerNo microphones are gating Some microphones are not gating Too many microphones are gatingEcho Canceller Reference Matrix MixerResidual Echo Room Audio Sounds ChoppyFinding the Source of Echo Room Gain Excessive Room Gain Room GainIn-Conference Quick Check Excessive Microphone Amplification Insufficient NonlinearityContacting Technical Support Email vortex@polycom.comTechnical Specifications USA and Canada ComplianceUS Telco requirements Automatic Dialing Telco Connector Canadian Telco RequirementsAustralia Rest of WorldThis page was intentionally left blank CE Mark R& TTE Directive Vortex EF2241 Reference Manual Technical Support Conference System Design Noise and Reverberation Consider Room GainEF2241 Block Diagram EN Echo Canceller, Noise CancellerConnector Pinouts EF BusInput/Output Remote Control Port Making AN EF BUS Terminator Connecting Unbalanced RCA to Balanced Mini PhoenixInstructions Additional Notes Warranty Information RMA# Must be on packageWhat this warranty does not cover State Law RightsEcho Canceller Definition of TermsAcoustic Echo Crosspoint Mix Minus BusNOM Attenuation NOM Bus Presets Room Gain NOMDefinition of Terms Index NOM Index Page 1725-80098-001-C