Vortex EF2280 Reference Manual VORTEX EF2280 REFERENCE MANUAL Introduction....................................................................................................2 Product Features .................................................................................................... 3 Pre-Installation...............................................................................................4 EF2280 Front and Rear Panels.............................................................................. 5 Installation .....................................................................................................7 Mounting the EF2280 ............................................................................................. 7 Connecting the EF2280 to Other Equipment ......................................................... 7 Device IDs on the EF Bus....................................................................................... 9 Connecting Multiple EF2280s................................................................................ 9 Factory Default Settings (Preset 0) ........................................................................ 11 Check Surrounding Equipment............................................................................... 13 Integrating the EF2280 Into Your System .....................................................15 Input Settings .......................................................................................................... 15 Calibration.............................................................................................................. 15 Build Your Echo Canceller Reference.................................................................... 17 Echo Canceller Reference for Multiple EF2280s................................................... 18 Configure the Automatic Microphone Mixer.......................................................... 20 Automixer Settings for Multiple EF2280s .............................................................. 22 Configure the Matrix Mixer.................................................................................... 23 Building Your System with Multiple EF2280s........................................................ 23 Presets..................................................................................................................... 25 Other EF2280 Features.......................................................................................... 25 LCD Menu Structure .....................................................................................26 System Menu ........................................................................................................... 29 Inputs ...................................................................................................................... 30 Outputs.................................................................................................................... 31 Automixer Menu...................................................................................................... 32 Matrix Menu ........................................................................................................... 34 Parametric EQ Menu.............................................................................................. 35 Troubleshooting .............................................................................................36 Automatic Microphone Mixer................................................................................. 36 Matrix Mixer........................................................................................................... 37 Echo Canceller Reference ...................................................................................... 37 Residual Echo ......................................................................................................... 37 Contacting Technical Support ................................................................................ 42 Technical Specifications ................................................................................43 Compliance ............................................................................................................. 43 Conference System Design ............................................................................46 EF2280 Block Diagram .................................................................................47 Connector Pinouts..........................................................................................48 Connecting Unbalanced RCA to Balanced Mini Phoenix...................................... 50 Making an EF Bus Terminator ............................................................................... 50 Additional Notes ..................................................................................................... 51 Warranty Information ....................................................................................52 Definition of Terms .......................................................................................54 Index ..............................................................................................................57 Polycom, Inc., Copyright 2001 Technical Support: 800.932.2774 1 INTRODUCTION INTRODUCTION Welcome How to Use This Manual Congratulations on your purchase of the Vortex EF2280! This is a reference manual for your EF2280. It is structured to provide the information you need quickly and conveniently. The following is an overview of each section: · · · · · Introduction Conference System Design gives suggestions on topics to consider when designing your system. Pre-Installation includes information about the contents of the box, tools needed for installation and front and rear panel descriptions. Installation covers connections of inputs/outputs and calibration of inputs of the EF2280. Integrating the EF2280 Into Your System describes adjustments to take into consideration when integrating the EF2280 with surrounding equipment in your system. LCD Menu Structure describes an overview of the LCD menu structure and also gives a system overview of features and options available. Troubleshooting helps to debug problems with installation. Technical Specifications provides the technical specifications of the EF2280. EF2280 Block Diagram shows the inside of the EF2280. Connector Pinouts shows pinout diagrams for EF2280 input and output connectors. Warranty Information Definition of Terms explains terms used in this manual, as well as terms used in our technology of echo cancellation, noise cancellation, and audio conferencing. · · · · · · · About the EF2280 The EF2280 is a 12-input, 12-output, 8-channel acoustic echo and noise canceller with matrix mixing and automatic microphone mixing capabilities. It includes a total of 12 analog inputs (8 mic/line level inputs and 4 line level inputs), 12 analog outputs, and 4 digital expansion busses. Acoustic echo cancellation (AEC) and noise cancellation can be applied to each of the 8 mic/line level inputs, and each of these inputs can then be sent to one of the two internal automatic microphone mixers. The system also contains a 25 x 18 main matrix, and four 7 x 3 submatrices. The 25 x 18 main matrix has the following inputs: input channels 1-8 (gated or ungated), input channels A-D, the internal signal generator, and 3 mixes of each of the four digital busses (3 mixes times 4 busses equals 12 inputs). The 25 x 18 main matrix has the following outputs: outputs 1-8 and A-D, AEC reference 1 and 2, and W, X, Y, and Z outputs to the digital expansion bus. The EF2280 has 24 bit resolution, 32-bit floating point computation, and a 48 kHz sampling rate. Polycom's proprietary noise cancellation on each of the 8 mic/line inputs helps to keep overall ambient noise to a minimum. Polycom echo cancellers are the only ones on the market to feature this patent pending technology. Noise cancellation filters out ambient background noise such as noise from heating, ventilating and air conditioning (HVAC), LCD projectors, and road noise. Our noise cancellation technology is not a noise gate. It actually removes noise. Therefore, it enhances the operation and VORTEX EF2280 Reference Manual 2 Technical Support: 800.932.2774 INTRODUCTION 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. Warranty Registration Please take a moment to fill out and return your warranty 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 (Parametric, High/Low Pass, High/ Low Shelf) Echo cancellation on Inputs 1-8 Noise cancellation up to 15 dB Two internal automatic microphone mixers for Inputs 1-8 25 x 18 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 Inputs and Outputs · · · · · · · 8 microphone/line level inputs with phantom power on each input 24 VDC Phantom Power 4 line level auxiliary inputs with nominal level of 0 dBu 12 digitally controlled analog trimpots for the 12 input signals 12 line level outputs with default nominal level of 0 dBu Automatic Gain Control (AGC) on Inputs 1-8. Phoenix connectors for audio input and output Remote Control · · · · · · RS-232 port for remote control Reconfigurable parallel logic input/output ASPI bus for controlling multiple EF devices from a single controller EF bus for linking multiple EF2280s. Digital bus with 4 audio busses, 48 kHz sampling rate Up to 8 devices can be linked, each device providing 4 audio signals on the bus © Polycom, Inc. 3 VORTEX EF2280 Reference Manual PRE-INSTALLATION PRE-INSTALLATION What's Included The Vortex EF2280 product package includes the following items: · · · · · · · · · · Vortex EF2280 Reference Manual Vortex EF2280 External power supply Cat 5 cable for EF Bus or ASPI Bus EF Bus terminator Rack mount screws (4) Phoenix connectors (24) Cable clamp and screw CDROM containing other manuals and Conference Composer software Warranty Registration Card Rackmount Screws (4) x x Vortex® EF2280 x x Phoenix Connectors (24) Cable Clamp and screw EF Bus Terminator CDROM with control software and manuals Vortex® EF2280 Reference Manual External Power Supply 1-Cat 5 cable (6 inches) for EF Bus or ASPI Bus Vortex EF2280 Reference Manual Figure 1. What's Included with your Vortex EF2280. What's Not Included The following equipment is not included with the EF2280 product package, but may be necessary to create a completely functional system: · · · · · · · Microphones Loudspeakers Audio amplifier (or amplified loudspeaker) EF200 Phone Add Audio cables Videoconferencing codec or other four-wire interface (optional) RS-232 remote control device (optional) Tools Needed for Installation · · Screwdriver to mount the EF2280 in your rack. Phoenix connector screwdriver VORTEX EF2280 Reference Manual 4 Technical Support: 800.932.2774 PRE-INSTALLATION EF2280 FRONT AND REAR PANELS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 Figure 2. EF2280 Front and Rear Panels 1. 2. 3. 4. 5. 6. 7. 8. LCD DISPLAY. Displays menu instructions for configuration and operation of the EF2280. DOWN BUTTON. Scrolls backward through menu items at a particular level or decreases the value of a parameter. UP BUTTON. Scrolls forward through menu items at a particular level or increases the value of a parameter. ENTER. Enters the menu and allows you to select and change parameter values. ESC. Returns to the next highest level of menus. HOME. Returns to the top of the menu structure. LEVEL INDICATOR. Indicates the level of the selected channel or parameter. CHANNEL ACTIVITY LEDS. Indicates gating activity of the 8 mic/line channel inputs. © Polycom, Inc. 5 VORTEX EF2280 Reference Manual PRE-INSTALLATION 9 10 11 12 13 14 15 Figure 3. Parallel remote control, EF BUS, serial remote control, ASPI BUS OUT, and power supply input on back panel of the EF2280. 9. 10. 11. 12. 13. INPUT PARALLEL PORT. Parallel logic input ...