Polycom Vortex EF2280 Reference Manual
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Polycom Vortex EF2280 Reference Manual

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  • Page 1 Vortex EF2280 Reference Manual...

  • Page 3: Table Of Contents

    EF2280 Block Diagram .................57 Connector Pinouts..................58 Connecting Unbalanced RCA to Balanced Terminal Block........60 Making an EF Bus Terminator ................60 Additional Notes ..................... 61 Warranty Information ..................63 Definition of Terms ..................65 Index ......................69 Polycom, Inc., Copyright 2004 Technical Support: 800.765.9266...

  • Page 4: Vortex Ef2280 Reference Manual

    EF2280 R ORTEX EFERENCE ANUAL Polycom, Inc., Copyright 2004 Technical Support: 800.795.9266...

  • Page 5: Introduction

    The EF2280 has 24 bit resolution audio paths, 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 © Polycom, Inc. EF2280 Reference Manual...

  • Page 6: Product Features

    NTRODUCTION only ones on the market to feature this patented technology. Noise cancella- tion filters out ambient background noise such as noise from heating, ventilat- ing and air conditioning (HVAC), LCD projectors, and road noise. Our noise cancellation technology is not a noise gate. It actually removes noise. There- fore, it enhances the operation and improves the sound quality of an auto- mixer, for example, by preventing it from bringing the noise level up and down when microphones are gated on and off.

  • Page 7: Remote Control

    EF bus for linking multiple Vortex devices • Digital bus with 4 audio busses, 48 kHz sampling rate • Up to 8 Vortex EF2280 devices can be linked, each device providing 4 • audio signals on the bus. © Polycom, Inc.
  • Page 8 NTRODUCTION EF2280 Reference Manual Technical Support: 800.765.9266 ORTEX...

  • Page 9: Pre-Installation

    NSTALLATION NSTALLATION 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 • Rack mount screws (4) • Phoenix connectors (24) •...

  • Page 10: Ef2280 Front And Rear Panels

    NSTALLATION EF2280 F RONT AND ANELS EF2280 ORTEX POLYCOM CHANNEL ACTIVITY DOWN ENTER HOME METER -20 -12 -7 9 20 LINE OUTPUTS EF BUS IN INPUT +5, +/-15 VDC REMOTE CONTROL RS-232 MIC/LINE INPUTS LINE INPUTS EF2280 OUTPUT ORTEX EF BUS OUT...
  • Page 11 . Connects to microphone at either mic or line level, with NPUTS or without phantom power. 16. L . Inputs A-D at line level. NPUTS 17. L . Outputs 1-8 at line level, A-D at line level. UTPUTS © Polycom, Inc. EF2280 R ORTEX EFERENCE ANUAL...
  • Page 12 NSTALLATION EF2280 Reference Manual Technical Support: 800.765.9266 ORTEX...

  • Page 13: Installation

    The EF2280 has 8 mic/line inputs plus 4 line level inputs and 12 line level out- puts. Each input/output is “Pin 1 compatible” — this means that the ground pin of each input/output is tied to chassis ground. Chassis ground is con- nected to the input power ground. © Polycom, Inc. EF2280 Reference Manual ORTEX...
  • Page 14 RS-232 PIN 2: TXD, PIN 3: RXD, PIN 5: GROUND, PIN 7: CTS, PIN 8: RTS EF BUS OUT Vortex ® EF2280 Audio POLYCOM CODEC Amplifier Room Amplifier Polycom Video Codec 4-wire Connection Figure 6. Typical EF2280 connections. EF2280 Reference Manual Technical Support: 800.765.9266 ORTEX...

  • Page 15: Device Ids On The Ef Bus

    ONNECTING ULTIPLE Up to 8 Vortex EF2280 devices can be linked together at one time (See Device IDs on the EF Bus above). Each unit in the chain must have a unique Device ID. Use the EF Bus to link multiple Vortex devices together.

  • Page 16: Factory Default Settings (Preset 0)

    LINE OUTPUTS Terminator Needed Figure 7. Legacy Vortex EF2280 products (SKU: 2200-82280-xyz) require an EF Bus terminator when linked at either end of a Vortex chain. EF2280’s that have their audio input and output connectors stacked (2200-12280-xyz) have a built-in terminator and do not need an external terminator when linked together.
  • Page 17 0 dB for Inputs A-D Manual Threshold 60 dB Mute Noise Cancellation Noise Cancellation Level 10 dB Phantom Power UTPUT HANNELS Mute NOM Attenuation On for Outputs 1-8 On for Outputs A-D Output Gain 0 dB © Polycom, Inc. EF2280 Reference Manual ORTEX...

  • Page 18: Check Surrounding Equipment

    NSTALLATION Presets and 0 is preconfigured for a system with multiple Vortex Devices. In this RESET Multiple Vortex preset, microphones are bussed out to other units on the W Bus. Microphones are also input into each device on the W Bus (INPUT W in the Matrix).
  • Page 19 This should also ensure that the program audio levels Sources are good when sent to the remote site. © Polycom, Inc. EF2280 Reference Manual ORTEX...
  • Page 20 NSTALLATION EF2280 Reference Manual Technical Support: 800.765.9266 ORTEX...

  • Page 21: Lcd Menu Structure

    ARAMETRIC RESETS and M . Each menu tree is organized by levels and branches into multiple ACROS subcategories. The branches end with an adjustable parameter or value. Vortex EF2280 System Settings System Inputs 1-8, A-D Outputs Automixer Matrix Parametric EQ...
  • Page 22 LCD M TRUCTURE at a particular level, use the D button. To scroll forward through menu items at a particular level, use the U button. To adjust a parameter, first locate the parameter by scrolling to the appropri- ate menu (with combinations of the U and E buttons).

  • Page 23: System Menu

    Enables or disables the screen saver on the LCD panel. You can also set the idle time. Last Restored Preset. Displays the last restored Preset. Software Version. Queries the software version. Reboot EF2280. Performs a software reboot of the Vortex product. © Polycom, Inc. EF2280 Reference Manual ORTEX...

  • Page 24: Inputs

    LCD M TRUCTURE NPUTS The input menu allows the user to adjust functions related to the input signals to the EF2280. This menu contains A COUSTIC ANCELLATION UTOMATIC , AGC M , AGC M ONTROL AXIMUM INIMUM DJUST EVEL OISE ANCELLATION OISE ANCELLATION...

  • Page 25: Outputs

    Figure 13. EF2280 outputs. Outputs submenu Output Delay. Sets the amount of delay on the output. The default value is 0 ms. The range is 0 to 340.0 ms in 0.1 ms increments. © Polycom, Inc. EF2280 Reference Manual ORTEX...

  • Page 26: Automixer Menu

    LCD M TRUCTURE UTOMIXER These parameters configure how the Vortex device automatic microphone mixer operates. Parameters include the following: D ECAY ID, C AMERA ATING HRESHOLD HAIRMAN HAIRMAN NOM, G NOM, O UMBER OCAL LOBAL Automixer TTENUATION UTOMIXER HRESHOLD ATING DAPTIVE HRESH , and G...
  • Page 27 This value is only used if the input set to Manual Gat- ing via the T option. The manual threshold value ranges HRESHOLD from 0 to 100 (shown in Conference Composer as 0 to -100) and repre- © Polycom, Inc. EF2280 Reference Manual ORTEX...

  • Page 28: Matrix Menu

    LCD M TRUCTURE sents the level in dB the audio must be above the current ambient back- ground noise to gate on the microphone. A value close to 0 makes it easy to gate on, a value close to 100 makes it very difficult to gate on. Microphone Priority.

  • Page 29: Parametric Eq Menu

    5 dB). Center frequency on shelving filters is the frequency where it crosses the point halfway between 0 dB and the gain of the filter, halfway up the slope. © Polycom, Inc. EF2280 Reference Manual ORTEX...

  • Page 30: Presets

    LCD M TRUCTURE RESETS Restore. Restores the selected preset. Save. Saves the selected user preset (Presets 16-47). Factory presets (Pre- set 0-15) cannot be overwritten. Presets Delete. Deletes the selected user preset (Presets 16-47). Factory Presets (Presets 0-15) cannot be deleted. Restore Save Presets 16-47...

  • Page 31: Integrating The Ef2280 Into Your System

    AGC is attenuating the channel’s input gain because the level is too high. If the number in the box is positive, increase the input gain on that channel because the AGC is boosting © Polycom, Inc. EF2280 Reference Manual ORTEX...
  • Page 32 EF2280 I NTEGRATING THE YSTEM the signal because it is too low. For example, if the meter is showing an aver- age gain of -15 dB, you should increase your input gain by 15 dB. If the meter shows an average gain of +10 dB, you should decrease your input gain by 10 AGC Level Meter Read AGC level Adjust Input Gain here...

  • Page 33: Build Your Echo Canceller Reference

    Bus Reference same Vortex device, 1. Assign far end audio and program audio sources to Reference 1 on the originating device. 2. On the EF Bus page in Conference Composer for the originating device, © Polycom, Inc. EF2280 Reference Manual ORTEX...
  • Page 34 3. On all linked devices, set the echo canceller reference to B For example, a system uses 2 EF2280s, 1 Vortex EF2201 Phone Hybrid, and 1 Polycom VS4000 video codec. The originating sources for far end audio is EF2280 with ID 0. The Matrix for this EF2280 in Conference Composer is shown in Figure 12 and the EF Bus page in Figure 13.

  • Page 35: Configure The Automatic Microphone Mixer

    If you have a PC, use the Conference Composer software (See the Conference Composer User Guide) to set the automixer parameters. If you would like to set automixer parameters using the LCD menus, see “Automixer Menu” on page 24 for instructions on setting automixer parameters. © Polycom, Inc. EF2280 Reference Manual ORTEX...
  • Page 36 EF2280 I NTEGRATING THE YSTEM Automixer The following parameters configure how the EF2280 automatic microphone Parameters mixer operates. Parameters include the following: Decay Time, Hold Time, Camera Gating Threshold, Chairman Mode, Chairman Mic, Last Mic On Mode, Last Mic Number, Local Max NOM, Global Max NOM, Off Attenuation, Thresh- old Type, Gating Mode, Gate Ratio, Manual Threshold, and Microphone Prior- ity.
  • Page 37 4 microphones for gating. The default is to have all microphones set to priority 1. If Chairman Mode is enabled, all microphones including ones with priority of 1 will be gated off when the Chairman mic gates on. © Polycom, Inc. EF2280 Reference Manual ORTEX...

  • Page 38: Automixer Settings For Multiple Vortex Devices

    EF2280 I NTEGRATING THE YSTEM UTOMIXER ETTINGS FOR ULTIPLE ORTEX EVICES When using more than one Vortex device in your room system, you have sev- eral possibilities for how you configure the automixer. Each device can oper- ate as one of the following: •...

  • Page 39: Configure The Matrix Mixer

    EF Bus page in Conference Composer, the inputs coming in to each submatrix labelled WB0, WB1,... WB7 correspond with the device ID of the bus that is transmitting. The “B” denotes Bus. The submixes them- © Polycom, Inc. EF2280 Reference Manual ORTEX...
  • Page 40 EF2280 I NTEGRATING THE YSTEM selves, denoted as WM0, WM1, and WM2 are mixes that are input into the main matrix. The “M” denotes Mix. The P Bus. The P Bus is provided specifically to allow devices to share dig- ital phone audio from the EF2241, EF2201, or EF2211.

  • Page 41: Presets

    P accordingly. OWER RESET EF2280 F THER EATURES For information on Macros, Logic Inputs, Logic Outputs, Input Filters and Out- put Filters, please refer to the Conference Composer User Guide. © Polycom, Inc. EF2280 Reference Manual ORTEX...
  • Page 42 EF2280 I NTEGRATING THE YSTEM EF2280 Reference Manual Technical Support: 800.765.9266 ORTEX...

  • Page 43: Troubleshooting

    Adaptive Gate Threshold, set the Adaptive Threshold higher so that the microphone will gate when only louder signals are present at the micro- phone. For Manual Gate Threshold, set the Manual Threshold to a higher absolute threshold. © Polycom, Inc. EF2280 Reference Manual ORTEX...

  • Page 44: Matrix Mixer

    ROUBLESHOOTING • Using the Adaptive Gate Threshold is recommended for more accurate gating. ATRIX IXER Don’t hear output • Make sure the output is not muted. • Check that the input you’re expecting to hear is included in the output that you’re listening to.
  • Page 45 AEC as the local microphone input signal. The room gain of a microphone channel refers to the relative levels of the sig- nal sent to the loudspeaker output (before any amplification) and the level of © Polycom, Inc. EF2280 Reference Manual ORTEX...
  • Page 46 ROUBLESHOOTING this signal that is reflected as the microphone input (after microphone amplifi- cation). Room Gain = 20 log (B/A) Figure 28. Room Gain. If the level of the reflected signal picked up by microphone is the same as the level of the signal sent from the AEC to the loudspeaker output, the room gain of this microphone channel is said to be 0 dB.
  • Page 47 (this will be indicated by observing low activity levels on the S for the reference sig- IGNAL EVEL ETER nal). © Polycom, Inc. EF2280 Reference Manual ORTEX...
  • Page 48 ROUBLESHOOTING Excessive For the EF2280 to adapt effectively, saturation (overload or clipping) must not Microphone occur at the A/D converter supplying the microphone input. Saturation intro- duces nonlinear signal distortions into what the AEC expects is a linearly Amplification echoed version of the remote speech. Nonlinear distortion causes a degradation or divergence of the AEC’s internal model of the room acoustics.

  • Page 49: Contacting Technical Support

    Polycom Inc. 4750 Willow Road Pleasanton, CA 94588 Phone: 1 (800) Polycom (765-9266) Online Help www.polycom.com Choose eSupport eSupport is a source for product information, white papers, general ques- tions, or you may check the status of an RMA.
  • Page 50 ROUBLESHOOTING EF2280 Reference Manual Technical Support: 800.765.9266 ORTEX...

  • Page 51: Conference System Design

    The EF2280 is a great way to reduce noise in your sys- tem and improve the SNR. Polycom’s patent pending noise cancellation algo- rithm, included in the EF2280, removes up to 15 dB of ambient background noise and improves perceived quality as well as intelligibility.
  • Page 52 ONFERENCE YSTEM ESIGN To help you measure room gain, the EF2280 includes a room gain detector. You should check your room gain after you have set up the EF2280. Room Gain = 20 log (B/A) Figure 29. Room Gain. EF2280 Reference Manual Technical Support: 800.765.9266 ORTEX...
  • Page 53 < -90 dB FS Common Mode Rejection < -61 dB, 20 - 20,000 Hz, no weighting Ratio Cross talk < -104 dB, 20 - 20,000 Hz, channel-to-channel Latency Mic/Line inputs to outputs: 13 ms, processing enabled © Polycom, Inc. EF2280 Reference Manual ORTEX...

  • Page 54: Technical Specifications

    Cet appareil numérique de la classe [A] est conforme à la norme NMB-003 du Canada. CE Mark - LVD This Vortex EF2280 has been marked with the CE mark. This mark indicates and EMC compliance with EEC Directives 89/336/EEC and 73/23/EEC. A full copy of the...
  • Page 55 ECHNICAL PECIFICATIONS Declaration of Conformity can be obtained from Polycom. Ltd., 270 Bath Road, Slough, Berkshire, SL1 4DX, UK. Japan (VCCI) Class A ITE Korea Class A Rest of World WARNING EMC Class A ITE This is a Class A product. In a domestic environment this product may cause radio interference in which case the user may be required to take adequate measures.
  • Page 56 ECHNICAL PECIFICATIONS South Africa STANDARD DM SURGE PROTECTOR SPECIFICATIONS Primary Protection (Transversal and Longitudinal) Nominal dc spark over voltage 230V Impulse spark over voltage (at 1kV/s) 650V Nominal impulse discharge current (8/20us) 10kA Nominal impulse discharge current (50Hz/1s) Insulation resistance (at 100V dc) Capacitance 1.5pF Secondary Protection (Transversal nad Longitudinal)
  • Page 57 ECHNICAL PECIFICATIONS P.O. Box Sinoville South Africa Tel: +27 82 4520269 Fax: +27 1 27210751 © Polycom, Inc. EF2280 Reference Manual ORTEX...
  • Page 58 ECHNICAL PECIFICATIONS EF2280 Reference Manual Technical Support: 800.765.9266 ORTEX...

  • Page 59: Ef2280 Block Diagram

    Mic/Line 8 Input A Input B Input C Input D EN (Echo Canceller, Noise Canceller) Ungated Echo Noise Mute Gate Gated Canceller Canceller Parameters Parameters EC1, EC2, Bus Figure 30. Inside the EF2280 © Polycom, Inc. EF2280 Reference Manual ORTEX...

  • Page 60: Connector Pinouts

    ONNECTOR INOUTS ONNECTOR INOUTS EF Bus EF BUS IN The EF Bus uses RJ45 connectors. These should be used with category five twisted-pair cable. The total distance of the EF Bus should be less than 4.5 m. The EF Bus must be connected so that the EF Bus In of one box is connected to the EF Bus Out of another.
  • Page 61 5, 15 VDC The power supply input accepts a 5-pin DIN male connector. Only use the power supply pro- vided by Polycom. Use of other power supplies will void the warranty. 1 Ground; 2 Ground; 3 +5Vdc @ 3 A; 4 -15Vdc @ 0.3 A;...

  • Page 62: Connecting Unbalanced Rca To Balanced Terminal Block

    ONNECTOR INOUTS ONNECTING NBALANCED ALANCED ERMINAL LOCK 3.5 mm Terminal Block RCA Male Connector Black Black Shield Ring Figure 31. Cable construction for connecting unbalanced RCA to balanced 3 conductor terminal block. 1. Connect RCA Tip to terminal block pin 1. 2.

  • Page 63: Additional Notes

    Caution! Reliable earthing of rack-mounted equipment should be maintained. Particular attention should be given to supply connections other than direct connection to the Branch (use of power strips). © Polycom, Inc. EF2280 Reference Manual ORTEX...
  • Page 64 ONNECTOR INOUTS EF2280 Reference Manual Technical Support: 800.765.9266 ORTEX...

  • Page 65: Warranty Information

    For how long Two years. What we will do If your Vortex EF2280 product is defective and returned within two years of the date of purchase, we will repair or, at our option, replace it at no charge to you.
  • Page 66 90 days. The limited warranties and remedies set forth above are exclusive and in lieu of all other warranties, whether oral or written, express or implied. Polycom specifically disclaims any and all implied warranties, including, without limita- tion, the warranties of merchantability and fitness for a particular purpose.

  • Page 67: Definition Of Terms

    Echo Canceller An echo canceller estimates the echo in an audio signal by using a reference and preforms processing to eliminate the echo from the signal. © Polycom, Inc. EF2280 Reference Manual ORTEX...
  • Page 68 The Polycom patented noise cancellation algorithm is capable of removing 15 dB or higher of noise with no degradation at all to the resulting speech signal.
  • Page 69 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. © Polycom, Inc. EF2280 Reference Manual ORTEX...
  • Page 70 EFINITION OF ERMS EF2280 Reference Manual Technical Support: 800.765.9266 ORTEX...

  • Page 71: Index

    EF Bus 7, 9, 13, 14, 31, 34, 36, 37, 39, 51, 58, 66 EF Bus Reference 21, 38 Equalization 66 Equalizer 4 Factory Default Settings, Preset 0 14, 16, 29, 37 Front Panel Lock 21 Ground 59 © Polycom, Inc. EF2241 Reference Manual ORTEX...
  • Page 72 NDEX Ground, Chassis 60 Ground, Logic Input 59 Ground, Logic Output 59 Ground, Power Supply 59 Ground, RS-232 58 Grounding, Pin 1 Compatible 11 Inputs 4, 8, 9, 11, 13, 29 LCD Menu 4, 8, 19, 29, 31 Line Echo Canceller, LEC 4, 66 Logic Input 9, 39, 59 Logic Output 9, 39, 59 Matrix, Matrix Mixer 4, 26, 37...
  • Page 73 NDEX Signal Generator 4 Submatrix 26, 37, 38 Technical Support 47 Terminal Block Connectors 59 Terminating the EF Bus, Terminators 14, 60 Video Codec 32, 37 © Polycom, Inc. EF2241 Reference Manual ORTEX...
  • Page 74 NDEX EF2241 Reference Manual Technical Support: 800.765.9266 ORTEX...
  • Page 76 Technical Support: (800) 765-9266 ® ® Polycom , Vortex , and the Polycom logo are registered trademarks of Polycom, Inc. in the United States and various countries. Copyright © 2002 Polycom, Inc. All rights reserved. P/N 1725-80012-001 Rev C...

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