Enable AEC Checkbox | ClearOne comm PRO TH20, PRO 8I, SR 1212

The AEC tab shows a signal flow diagram for AEC, and has the following features: Enable AEC, PA Adapt and AEC Reference, NLP (Non-linear Processing), and PTT (Push-to-Talk) mode. These features are described in the following sections.

Enable AEC Checkbox

Select the checkbox to enable AEC.

PA Adapt and AEC Reference Button

This button displays the expansion bus output channel currently used as the AEC reference for the selected channel. Clicking the button closes the Channel Property Configuration window and opens the AEC Reference tab in the center pane of Console.

NLP (Non-Linear Processing) Radio Buttons

NLP increases the power of echo cancellation for difficult acoustical environments. NLP features four settings: Soft, Medium, Aggressive, Off. The default is soft.

NOTE: Use NLP with care. There are corresponding trade-offs associated with NLP, including suppression and half-duplex operation.

The AEC tab also includes meters for Echo Return Loss (ERL), Echo Return Loss Enhancement (ERLE), and Total Echo Reduction (ERL + ERLE).

ERL (Echo Return Loss) Meter

Shows the coupling between the reference signal and the input to the echo canceller—the difference of the two levels. This is an average meter that updates when a receive-only signal is present.

ERLE (Echo Return Loss Enhancement) Meter

Shows the loss through the echo cancellation and non-linear processing chain—the difference of the two levels. This is an average meter that updates when a receive-only signal is present.

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ClearOne comm PRO TH20 Enable AEC Checkbox, PA Adapt and AEC Reference Button, NLP Non-Linear Processing Radio Buttons

Contents

Converge PRO 880880T880TA840T8iTH20 Converge SR 1212SR 1212A Adobe Flash Copyright and Trademark Notice Clearone Part no -151-880 Revision 3.2 April Introduction 218 310 Applications Converge Pro Product Family Overview Common Benefits Common FeaturesFeature Enhancements Models Telephone Hybrid Enhancements 880T, 880TA, 840T, TH20 AEC Acoustical Echo Cancellation Enhancements Read all safety information before using this product Important safety information Converge Pro 880TA Advanced Telephone Conferencing Feature Set Converge Pro Converge Pro Product Descriptions Converge Pro 880T Converge Pro 840T Converge Pro Converge Pro TH20 Converge Pro SR 1212A Converge Pro SR1212 Customer Service and Support Warranty InformationProduct Registration System Requirements Operating Requirements Unpacking Converge Pro 880 Package Contents Converge Pro 880T Package Contents Converge Pro 880TA Packing Contents Converge Pro 840T Package Contents Converge Pro 8i Package Contents Converge Pro TH20 Package Contents Converge Pro SR1212 Package Contents Converge SR 1212A Packing Contents Converge Pro 840T Front Panel Controls and ConnectionsConverge Pro Front Panels Converge Pro 880 Front Panel Converge Pro SR1212A Front Panel Converge Pro 8i Front PanelConverge Pro TH20 Front Panel Converge Pro SR1212 Front PanelPage Converge Pro 840T Rear Panel Converge Pro Rear PanelsConverge Pro 880 Rear Panel Converge Pro 880T Rear Panel Converge Pro 880TA Rear Panel Converge Pro SR1212A Rear Panel Converge Pro Rear Panel ConnectorsConverge Pro TH20 Rear Panel Converge Pro SR1212 Rear PanelPage Page Expansion Bus Expansion Bus ConnectionsAudio and Control Buses Device IDs Device Types and IDsAssigning Device IDs LCD Programming Overview LCD Menu Tree Adjusting LCD Menu ParametersPage Front Panel Lock LCD Default Display Channel Display Accessing the Channels MenuSetting Channel Gain and Mute LCD Channels Menu RS-232 Network LCD Settings MenuAccessing the Settings Menu Default Contrast Flow Control Hardware Baud Rate Accessing the Macros Menu LCD Macros MenuExecuting Macros LCD Preset Menu Accessing the Presets MenuExecuting Presets Converge Console programming Installing Converge ConsolePage Page Navigating Converge Console Accessing Converge ConsoleDefault User ID and Password Converge Console Overview File View Add Connect Modes Services Menu BarButton Bar Site Pane Tab Bar Center Pane Objects Pane Status BarConsole Modes Site File Overview Accessing Site FilesPage Saving Site Files Connect to a Site Connect To a SiteDisconnect from a Site Site Properties Accessing Site Properties Site Properties General Tab Create a New Site Site Properties Management Tab Control Master UnitEmail Notifications Site Properties Time/Local Tab User name/PasswordsPage Unit Properties Accessing Unit Properties Add a New Unit Unit Properties General TabDevice Name Audio Master Device ID Telephone Country Code Default Meter & ChannelFront Panel Mode & PIN Front Panel Lock/Unlock Room Unit Properties Comm Communications Tab IP SettingsSerial Port Settings AMX Duet ModePage Configuration Mode Overview Accessing Configuration ModeConfiguration Mode Tabs Accessing the Unit Tab Unit TabUnit Tab Functionality Input Channel Settings Output Channel SettingsLED Buttons Processing Channel Settings Fader Channel Settings Expansion Audio RX and TX Power Amp Channels Converge Pro 880TA and SR 1212A Sound Mask Launches the Sound Mask pane Page »» Feedback Controls »» Feedback Eliminator Settings »» Filter Depth Mode »» Filter »» ModePage Page Accessing Channel Tab Channel Configuration ControlsChannel Tab Overview Channel Property Configuration Screen MetersChannel Routing Matrix Page Page Accessing AEC AEC Acoustic Echo Cancellation ERL Echo Return Loss Meter Enable AEC CheckboxPA Adapt and AEC Reference Button NLP Non-Linear Processing Radio Buttons ERL + Erle Meter PTT Push to Talk Mode Accessing NC NC Noise Cancellation Configuring Noise Cancellation Accessing Filters FiltersAll Pass High Pass Low Pass Notch PEQ Parametric Equalizer Active Filter Frequency Available for all filter types Filter NodesAdding Filters Filter Types Bypass All Phase Add Filter Remove FilterTable View AGC/ALC Automatic Gain Control/Automatic Level Control Tab Accessing AGC/ALC Response Time Slider Maximum Gain SliderTarget Level Slider Active Gain Meter Mic Gating Accessing Channel Gating Configurations Auto Gating Ambient Tracking Gating Settings Auto GatingAuto Gating Settings Gate Settings Manual Gating Post Gate Meter Manual Gating SettingsManual Gating Manual On/Manual Off Gating GroupsPage Channel Label Mic Input SettingsAccessing Mic Input Settings Ppwr Phantom Power Post Process Meter Pre Gain MeterGain Section Post Gain Meter Channel Configuration Buttons Channel Routing Matrix Inputs Expanded Channel Routing Matrix100 101 Creating Channel Objects 102 Optimizing Input Gain Structure Line Input Settings Accessing Line Input Settings103 104 Gain SliderMute Button AGC Automatic Gain Control Button AGC Configuration Settings Channel Routing Matrix Line Inputs105 106 Channel Routing Matrix Outputs, Processing, Faders 107 Telco RX Settings Accessing Telco Rx Settings108 109 NC Noise Cancellation Tab Telco Settings Tab 110Ringer Cadence Telco Meters Tab Dialer Button111 112 Dial Tone Level SliderRecv Boost Slider Recv Input Meter NOM Button NC ButtonClear Effect Button ALC Button Min/Max Limits Post-Gain Meter114 115 116 117 Output SettingsAccessing Output Settings NOM Number of Open Mics/Constant Level Output Level Meter Channel Routing Matrix Outputs118 119 Channel Routing Matrix Inputs, Processing, Faders 120 121 Optimizing Output Gain Structure Telco TX Settings Accessing Telco Tx Settings122 123 Limiter Channel Routing Matrix Telco Tx124 125 126 127 Processing Settings Accessing Processing Settings128 Delay Button Filter Button129 130 Cmprs Compression Button Ratio GroupPost Compressor Gain Threshold 132 Input MeterCompression Meter Gain Slider & Process Meter 133 134 135 Fader Settings Accessing Fader Settings136 Gain Slider & Post Gain Meter Channel Routing Matrix Faders137 138 139 140 Accessing the MatrixMatrix Tab Routing Legend Expansion Bus I-Z Routing Clear Matrix ButtonAudio Routing Matrix Input Routing Cross Point Shortcut Menu Cross Point Level Control142 Exporting Matrix Objects Copy and Paste CellsCopy and Paste Matrix Clear Matrix 144 Accessing AEC Reference/PA Adapt ReferenceAEC Reference/PA Adapt Reference Tab AEC/PA Adapt References Sources 145 Virtual AEC/PA Adapt References Output channels Speakers Virtual references Expansion Bus Reference SourcesPA Virtual References 146 147 Accessing MacrosMacro Tab Macro Recorder Macro Editor Creating Macros148 Deleting Macros Adding and Inserting Command LinesRunning Macros Using Console Modifying Macros 150 Running Macros Using the Front PanelRunning Macros Using Control Devices Exporting Macro Objects 151 Accessing Gating GroupsGating Tab Gating Controllers Internal Gating Groups Global Gating Groups152 153 154 Accessing the Control TabUser-Definable Pins Control Tab 155 Default Pin AssignmentsControl/Status Ports Control/Status Pin Programming Clearing Pin Programming Exporting Control Objects156 String Tab Accessing the String TabCommand String Special Characters Creating Command Strings 158 Running Command Strings 159 Accessing the Event SchedulerEvent Scheduler Tab Scheduling Events 160 161 Accessing the DatabaseDatabase Tab Database Button Bar AV Devices Creating a New AV Device162 Channel Objects 163Mic Input Line Input Telco Rx Output Telco Tx 164 Import/Export AV Devices and ObjectsUpload/Download AV Devices and Objects Modifying AV Devices and Objects 165 Optimizing Gain Structure Optimizing Gain for Mic Input Channels166 Optimizing Gain for Output Channels Optimizing Gain for Line Input ChannelsOptimizing Gain for Telco Rx Channels Optimizing Gain for Telco Tx Channels 168 169 Drag and Drop ConfigurationAccessing Drag and Drop Configuration Using Drag and Drop Configuration 170 Creating Objects 171 172 Macro Objects Preset ObjectsMatrix Objects Control Objects 174 Preset Mode Accessing Preset Mode175 176 Preset Configuration Tabs 177 Creating Presets 178 179 Executing Presets Using ConsoleExecuting Presets Using the LCD Preset Menu Executing Presets Using Control Programming Preset Storage Space Considerations Executing Presets Using MacrosPreset Execution Flags Preset Control Masking 181 Exporting Preset Objects File Menu allows you to use Site Files and Print Reports Accessing the File MenuFile Menu Overview 182 183 184 Accessing Print ReportsPrint Reports Report Window Accessing the View Menu View Menu Overview185 186 View Menu Options 187 Accessing the Add MenuAdd Menu Adding Units 188 189 Connect Menu Options Accessing the Connect MenuSite Setup Overview Connect To a Site Create a New Site Connect Menu Overview 191 Accessing the Modes MenuConfiguration Mode Preset Mode Console Button Bar Modes Menu Overview 192 Services Menu OverviewAccessing the Services Menu Service Menu Options Accessing Dialer Dialer193 Renulling the Line Using Line FeaturesPlacing and Ending Calls Muting 195 Accessing PhonebookUsing Phonebook Phonebook 196 Dialer Button Bar Services Menu Overview 197 Accessing Label EditorUsing Label Editor Label Editor Accessing Device Log Device Log198 199 Using Device Log 200 Accessing Event Log Event Log201 Using Event Log Services Menu Event Scheduler202 203 Accessing Web BuilderConfiguring User Console Web Builder 204 Line User Volume Down Volume Up Mute 205 Configuring Control Console 206 Accessing the Web Portal 207 208 Accessing Firmware LoaderFirmware Loader Loading Firmware 209 210 Accessing Debug ConsoleDebug Console Meter View Tab 211 Gate View Tab 212 Signal GeneratorTest Signal Types Running a Signal Test Tone Frequency Settings System Checks Tab213 System Check Config Tab PA Temp Define PA Fault Define214 215 Sound Masking Tab ADD Info Execute Presets Accessing Execute Presets216 217 218 Command Form DescriptionType and Device IDs Conventions Groups and Channels PA Virtual Reference219 220 Meter Type Definitions Table 221 222 Serial Command IndexAEC Acoustic Echo Cancellation Enable / Disable Cleareffect Clear Effect Wide Band Telco Emulation 223 224 225 Refsel Reference Select for PA Adaptation & AEC 226 227 Serial Commands 228 AD Auto Disconnect Enable / DisableAconnlvl Audible Connect / Disconnect Level Adclip Audio Clipping Adpresent Audio Presence AGC Automatic Gain Control229 230 AVT Adaptive Volume Threshold AVG Adaptive Volume GainAVR Adaptive Volume Reference Avrt Adaptive Volume Ratio 232 233 Compdly Compressor DelayCompdlyEN Compressor Delay Enable Clock Clock Set Country Country Selection Compress Compressor AdjustCtrlmaster Control Master Mode Compsel Compression Select 235 Devicetype Sets the Type of a Connected Device Dfltm Default MeterDiag Diagnostic Commands Devicesubtype Sets the Subtype of a Connected Device 237 Enetdhcp Ethernet Dhcp Selection Enetdomain Ethernet Domain Argument238 Groups and Channels FE Feedback Elimination EnableEref Expansion Bus Reference 239 240 241 FEN Feedback Elimination Nodes 242 Filter Filter Adjust Flow Flow Control FMP First Mic Priority ModeGain Gain Adjustment Filtsel Filter Select Gpiostatus General Purpose Status Gmode Gating ModeGate Gate Status Gover Gating Override Hook Hook Flash Gratio Gate Ratio AdjustGreport Gate Report Grpsel Gating Group Select 246 247 248 Locstate Location StateLogmask Device Log Mask LVL Level Manufacturer Manufacturer Identification Label Lvlreporten Level Report EnableLvlreport Level Report Macro Macro Execution/Reporting MC Multi-Channel Mode Mcgain Multi-Channel Gain250 DB / sec Mcminmax Multi-Channel Min and max Gain SettingMcmute Multi-Channel Min and Max Gain Setting Mcramp Multi-Channel Ramp MIN Minimum Gain Setting Mmax Maximum Number of Microphones252 253 Model Model Identification LabelMtrx Matrix Routing Mtrxclear Clear Matrix Mute Mute Mtrxlvl Matrix Attenuation AdjustName Unit Name Netbios Name NCD Noise Cancellation Depth Adjust 255 Ncsel Noise Cancellation SelectNLP Non Linear Processing Adjust Null Null the Telephone Line 256 PAA PA Adaptive ModePacen PA Softclipper Enable PAENergy PA Energy-saver mode Argument Type Size Paeqrst PA EQ Filter ResetPaeqset PA EQ Filter Set 257 Palt PA Limiter Threshold Paflt PA FaultPalen PA Limiter Enable Paimped PA Output Impedance Pangf PA Noise Gate Filter Pangat PA Noise Gate Activation TimerPangen PA Noise Gate Enabled Pangm PA Noise Gate Mode 260 Phonebookadd Adds an Entry to the Phonebook Pasmm PA Sound Mask ModePasmt PA Sound Mask Timer Pato PA Thermal Overload 262 Pushtotalk Push to Talk Ramp Ramp Gain AdjustmentPrgstring Program String Pttthreshold Push to Talk Threshold Ring Ring Indication Refset Reference Channel Set UpReset Reset Redial Redial the Last Number 265 266 Ringoff Ring Cadence Off TimeRingon Ring Cadence On Time Rxboost Receive Boost 267 Smtpsrv Smtp Mail Server Address Siggensweep Signal Generator SweepSigtout Signal Generator Time Out Slvl Speech Level Control 269 Syschecks System Checks Sysresult System Check Result270 271 Tamode Telco Adapt Mode 272 273 274 Xdelaysel Audio Delay Enable 275 Serial Command Support Table 276 277 278 279 Control/Status Ports Converge Pro 880 Port a Female DB-25280 281 Converge Pro 880T Port a Female DB-25 282 Converge Pro 840T Port a Female DB-25 283 Converge Pro 8i Port a Female DB-25 284 Converge Pro TH20 Port a Female DB-25 285 Converge SR 1212 Port a Female DB-25 All Models RS-232 Port All Models Port B Female DB-25286 287 Appendix C Firmware Loading Procedure 288 Converge Pro Control/Status Ports 289 290 Converge Pro 880T 291 292 Converge Pro 880TA 293 294 Converge Pro 840T 295 296 297 298 Converge Pro TH20 299 Converge SR 300 301 Converge SR 1212A 302 FCC Part 15/ICES-003 Compliance FCC Part 68 Compliance303 304 Electrical Safety Advisory Safety 73/23/EEC Low Voltage Directive LVD IEC 60950-1 305Equipment 2003/11/EC & 2002/95/EC RoHS Compliance Directive 306 307 308 Safety 73/23/EEC Low Voltage Directive LVD 309 NEW Zealand Compliance 310 Glossary 311 312 313 314 315