Polycom manual EF2241 Block Diagram, EN Echo Canceller, Noise Canceller

Page 54

VORTEX EF2241 Reference Manual

Figure 30. Inside the EF2241

50

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Copyright (c) 2001, Polycom Inc. All Rights Reserved
Output 1	Output 2	Output 3	Output 4	Output A	Output B	Output C	Output D
Line	Line	Line	Line	Line	Line	Line	Line
+ -	+ -	+ -	+ -	+ -	+ -	+ -	+ -
D/A	D/A	D/A	D/A	D/A	D/A	D/A	D/A	D/A
Delay	Delay	Delay	Delay	Delay	Delay	Delay	Delay	Delay
PEQ	PEQ	PEQ	PEQ	PEQ	PEQ	PEQ	PEQ	PEQ

Matrixing

EN	EN	EN	EN	PEQ	PEQ	PEQ	PEQ
A/D	A/D	A/D	A/D	A/D	A/D	A/D	A/D
Level	Level	Level	Level	Level	Level	Level	Level
adjust	adjust	adjust	adjust	adjust	adjust	adjust	adjust
Phantom	Phantom	Phantom	Phantom
Mic/Line + -	Mic/Line + -	Mic/Line + -	Mic/Line + -	+ -	+ -	+ -	+ -
Mic/Line 1 Mic/Line 2 Mic/Line 3 Mic/Line 4				Input A	Input B	Input C	Input D

EN (Echo Canceller, Noise Canceller)

										Ungated
	Echo	Noise		AGC		PEQ	Mute		Gate	Gated
	Canceller	Canceller		AGC		PEQ	Mute		Gate	Gated
	Canceller	Canceller
	R1, R2, Bus	On	Off	On	Off	Parameters	On	Off	Parameters
	R1, R2, Bus					Parameters			Parameters

Amplifier

Output

+ -

AMP

PEQ Tone

Gen.

D/A

LEC

A/D

TLP

TLP (Telephone Line Processing)

	PEQ	AGC	Noise	Call Prog	Mute
			Canceller	Detect

	Parameters	On Off	Parameters	Parameters	On Off

Phone

Telephone

Line

RS-232

EF Bus

Control/Status

EF2241 BLOCK DIAGRAM

EF2241 BLOCK DIAGRAM

Image 54

Contents Vortex EF2241 Reference Manual Page Introduction Welcome How to Use This Manual IntroductionProduct Features Product RegistrationProduct Inputs Outputs Remote Control What’s Included PRE-INSTALLATIONTools Needed for Installation What’s Not IncludedEF2241 Front and Rear Panels PRE-INSTALLATION Mounting the EF2241 InstallationConnecting the EF2241 to Other Equipment North American RequirementTypical EF2241 Connections CodecConnecting Multiple Vortex Devices Device IDS on the EF BUSFactory Default Settings Preset Terminating the EF2241Off Presets Multiple Vortex Devices Pick a Standard Signal LevelCheck Surrounding Equipment Configure Program Audio Sources Input Settings Integrating the EF2241 Into Your SystemCalibration Set Levels on Line Input Channels Echo Canceller Reference for Multiple Vortex Devices SET UP the Phone InterfaceBuild Your Echo Canceller Reference Customize Setting for Your Particular ApplicationSetting up Bus ReferenceConfigure the Automatic Microphone Mixer Automixer ParametersGlobal Settings Automixer Settings for Multiple Vortex Devices Channel SettingsConfigure the Matrix Mixer Default SettingsBuilding Your System with Multiple Vortex Devices Configure the submatrix Assign Inputs Assign OutputsEF BUS Presets Other EF2241 FeaturesConfigure 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 MacrosNo 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 Room GainIn-Conference Quick Check Excessive Microphone Amplification Insufficient NonlinearityContacting Technical Support Email vortex@polycom.comTechnical Specifications Compliance USA and CanadaUS 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 Connecting Unbalanced RCA to Balanced Mini Phoenix Making AN EF BUS TerminatorInstructions Additional Notes Warranty Information RMA# Must be on packageWhat this warranty does not cover State Law RightsAcoustic Echo Echo CancellerDefinition of Terms Crosspoint Mix Minus BusNOM Attenuation NOM Bus Presets Room Gain NOMDefinition of Terms Index NOM Index Page 1725-80098-001-C