Polycom Vortex EF2280 Reference Manual
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Polycom Vortex EF2280 Reference Manual

Polycom Vortex EF2280 Reference Manual

Polycom ef2280 audio: reference manual
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  • Page 1 Vortex EF2280 Reference Manual...

  • Page 3: Table Of Contents

    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...

  • Page 4: Introduction

    Congratulations on your purchase of the Vortex EF2280! How to Use This This is a reference manual for your EF2280. It is structured to provide the informa- Manual tion you need quickly and conveniently. The following is an overview of each sec- tion: •...

  • Page 5: Product Features

    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. EF2280 Reference Manual ORTEX...

  • Page 6: Pre-Installation

    Connectors (24) External Power Supply 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 •...

  • Page 7: Ef2280 Front And Rear Panels

    EF2280 F RONT AND Figure 2. EF2280 Front and Rear Panels LCD D the EF2280. decreases the value of a parameter. the value of a parameter. inputs. © Polycom, Inc. ANELS . Displays menu instructions for configuration and operation of ISPLAY .
  • Page 8 COM port. 14. ASPI B EF200) to be used for RS-232 control from a single control device. 15. P EF2280. Figure 4. Inputs and outputs on back panel of the EF2280. 16. M without phantom power. 17. L 18. L 19.

  • Page 9: Installation

    This gives you easier access to the back panel. If you cannot leave a single rack space, mount the EF2280 below units that are longer in length so that you can access the Phoenix connectors on the back panel more easily.
  • Page 10 In 6 In 7 In 8 In A In B In C In D Figure 5. Block diagram of typical EF2280 connections: a single room using one EF2280. Vortex ® EF2280 Figure 6. Typical EF2280 connections. EF2280 Reference Manual ORTEX...

  • Page 11: Device Ids On The Ef Bus

    W, X, Y, and Z busses, and how many have the ability to transmit on the P Bus. The EF2280, for example can only transmit on the W, X, Y, and Z busses while the EF2241 can transmit on the W, X, Y, and Z busses as well as the P bus.
  • Page 12 EF Bus Terminator” on page 50 for information and instructions on how to make one. Figure 7. Connecting and terminating multiple EF2280s. The EF2280 does not have to be terminated if you are using a single unit not con- nected together with another EF2280. Connecting the...

  • Page 13: Factory Default Settings (Preset 0)

    ACTORY EFAULT ETTINGS The following is a list of the factory default settings of the EF2280. Since the micro- phones and other equipment in your application may have different nominal levels, you can start with a F ronment and then save it within the EF2280 as a U you’ve saved a U...
  • Page 14 Gate Ratio Gate Threshold Gating Input Gains Manual Threshold Mute Noise Cancellation Noise Cancellation Level Phantom Power UTPUT Mute NOM Attenuation Output Gain EF2280 Reference Manual ORTEX ARAMETERS ARAMETERS ARAMETERS HANNELS HANNELS NSTALLATION ACTORY EFAULT RESET ALUE 1000 ms 500 ms...

  • Page 15: Check Surrounding Equipment

    Presets and Multiple RESET EF2280s bussed out to other units on the W Bus. Microphones are also input into each EF2280 on the W Bus (I If you have multiple EF2280s in your system, save settings to a preset on each EF2280.
  • Page 16 Set the gains on the matrix mixer inputs from the program audio sources so that pro- Audio Sources 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.

  • Page 17: Integrating The Ef2280 Into Your System

    EF2280 I NTEGRATING THE Operating the The EF2280 can be operated in two ways: through the LCD menu on the front panel EF2280 or through RS-232. For control via RS-232, please refer to the EF2280 Programming Guide, which includes programming tips as well as the EF2280 RS-232 commands.
  • Page 18 The line inputs have a maximum nominal level of 0 dBu. If your incoming line level inputs have a higher nominal level than 0 dBu you will want to use a pad to remove the level. EF2280 Reference Manual ORTEX NTEGRATING THE...

  • Page 19: Build Your Echo Canceller Reference

    (program audio, remote audio, phone audio, etc.). • An exception to this rule is when you use one EF2280 split to operate indepen- reinforcement, dently in two rooms. If the two rooms communicate with each other (along with communicating via codec and the phone line), the reference in the first room must contain the microphones from the second room and vice versa.

  • Page 20: Echo Canceller Reference For Multiple Ef2280S

    On all linked EF2280s, set the echo canceller reference to B For example, a system uses 2 EF2280s, 1 EF200, and 1 Polycom VS4000 video codec. The originating sources for far end audio is EF2280 with ID 0. The Matrix for EF2280 Reference Manual...
  • Page 21 NTEGRATING THE YSTEM this EF2280 in Conference Composer is shown in Figure 12 and the EF Bus page in Figure 13. Conference Composer will not allow more than one EF2280 assign their echo canceller reference as the Bus Reference. Notice that the EF200 and VS4000 inputs are both assigned to Reference 1 on the originating EF2280.

  • Page 22: Configure The Automatic Microphone Mixer

    If far end audio and program audio sources are on several EF2280s, Bus each far end audio and program audio source to each EF2280. Do this by assigning each signal input to either the W, X, Y or Z bus.
  • Page 23 Automixer 2. Now, if each of these EF2280s sets their Automixer 1 to use Bus Mixer 5, then the three automixers (one from each EF2280) will work as a single automixer containing 12 (3 x 4) microphones. Setting Bus Mixer to 0 means that the automixer is not grouped on the EF Bus.

  • Page 24: Automixer Settings For Multiple Ef2280S

    UTOMIXER ETTINGS FOR When using more than one EF2280 in your room system, you have several possibili- ties for how you configure the automixer. Each EF2280 can operate as one of the fol- lowing: • One automixer, independent of other EF2280s linked to it •...

  • Page 25: Configure The Matrix Mixer

    EF200 Phone Add or a video codec and any program audio. 2. Assign Outputs Try to assign as many outputs as you can to each EF2280 to make a simpler subma- trix. Remember that Outputs 1-8 can also be used as outputs of the matrix. The bus- sing can get very complicated very quickly if you choose to spread your outputs over several units.
  • Page 26 (for other EF2280s) and can link up to 8 EF2280 devices. All busses include NOM information and can be used for sharing microphone inputs, or for sharing mono or stereo program information.

  • Page 27: Presets

    EF2280 and assign it to the EF Bus as the EF Bus Reference. Only one EF2280 out of multiple units linked together can put an echo canceller reference on the EF Bus.

  • Page 28: Lcd Menu Structure

    Table 2: Summary of button functions on the EF2280. The EF2280 has five menu buttons on the front panel for navigation in the menu tree. Press the H menu. The E est level of menus. To scroll back through menu items at a particular level, use the...
  • Page 29 H , so the selected value will be cancelled and the button must be held down briefly before the repeat rate increases. LCD M TRUCTURE buttons). The display will show the and D buttons has the EF2280 Reference Manual ORTEX...
  • Page 30 System Overview Table 3 below shows a summary of EF2280 parameters and their ranges.. EF2280 Software Control Parameters Worksheet System Parameters Program Parameter Options Preset 0-47 Macros 0-255 Set Passcode Passcode Device ID Unit ID Number Factory programmed Auto Mix Parameters...

  • Page 31: System Menu

    Choose the EF2280 Preset for power up. This command controls whether or not status mes- This designates which EF2280 device, when multiple devices Turns error messages On or Off. Locks or unlocks the front panel. When the front panel is...

  • Page 32: Inputs

    NPUTS The input menu allows the user to adjust functions related to the input signals to the EF2280. This menu contains A ONTROL Inputs 1-8, A-D EFERENCE Inputs (1-8) and (A-D), so that you first select an input and then select settings for that Acoustic Echo input.

  • Page 33: Outputs

    Outputs you should always try to adjust input gains to a good level so that the output gain is 0 dB. If you find that you need a positive output gain from the EF2280, first check your Output Gain input gain to make sure you are getting a good level (around 0dB). Keep the output gain at around 0 dBu.

  • Page 34: Automixer Menu

    UTOMIXER These parameters configure how the EF2280 automatic microphone mixer oper- ates. Parameters include the following: D Automixer Global Settings Mixer Settings Channel Settings Figure 23. EF2280 Automixer submenu Figure 24. Automixer parameters. Global Settings. Decay Time. Decay time is the amount of time the microphone audio takes to ramp down to the Off Attenuation level after Hold Time.
  • Page 35 Automixer 1 and 4 microphones Automixer assigned to Automixer 2. Now, if each of these EF2280s sets their Automixer 1 to have Bus ID 5, then the three automixers (one from each EF2280) will work as Mixer Settings (AM1/AM2) a single automixer containing 12 (3 x 4) microphones.

  • Page 36: Matrix Menu

    Gain Mute. Gate (In 1-8) Mute SubMatrix Gain Mute Figure 25. EF2280 Matrix submenu EF2280 Reference Manual ORTEX contains commands for assigning input signals to output signals with ATRIX Assign input signals to output signals with appropriate gains Applies gating from Inputs 1-8 to an Output.

  • Page 37: Parametric Eq Menu

    Slope Lowpass. Filter Enable • Highpass. Figure 26. EF2280 Parametric EQ sub- • menu Center frequency on Parametric/Peaking is the point with the most (or least) gain. Bandwidth is the width halfway up the peak (so if the peak is 10 dB, it is the width between the points where the gain is 5 dB).

  • Page 38: Troubleshooting

    For Manual Gate Threshold, set the Man- ual Threshold to a higher absolute threshold. • Using the Adaptive Gate Threshold is recommended for more accurate gating. EF2280 Reference Manual ORTEX IXER ROUBLESHOOTING Technical Support: 800.932.2774...

  • Page 39: Matrix Mixer

    You may hear residual echo if system levels are not set properly. Improper level set- tings anywhere in the audio path can introduce nonlinearities that hamper the opera- tion of the EF2280. If you hear residual echo, one of the following conditions may be causing the problem.
  • Page 40 You cannot remove the effects of reverberation by changing the EF2280’s settings, but you can minimize reverberation by moving microphones closer to talkers and, if necessary, adding acoustical treatment to the room.
  • Page 41 This may be explained as follows. If the reference signal is too low coming into the EF2280, i.e. the codec audio signal is too low, the room audio amplifier is usually used to compensate and bring the room audio to an acceptable level.
  • Page 42 Run the built-in EF2280 Room Gain test to verify that you do not have room gain problems (See “Verify Room Gain” on page 13).
  • Page 43 Overdriving the loudspeaker or inserting a dynamics processor before the EF2280 may distort the signal that the microphones see causing ineffective AEC operation. The EF2280 relies on the linearity of the acoustic feedback path — D/A, amplifier, loudspeaker, microphone, and A/D — to cancel acoustic echoes. If you overdrive the...

  • Page 44: Contacting Technical Support

    • Increase the separation distance between microphones and the loudspeaker. The EF2280 handles up to 10 dB of room gain between the loudspeaker and the microphone. You may be exceeding this limit if the loudspeaker is pointed directly at the microphones or if the loudspeaker volume is excessive (loud- speaker placement is not critical, but it should not be pointed directly at the microphones).

  • Page 45: Technical Specifications

    Control Inputs Status Outputs OMPLIANCE The Vortex EF2280 complies with the ITU G.167 Recommendation for AEC, FCC part 15, and CE requirements. © Polycom, Inc. 19” (483 mm) W x 9.6” (244 mm) L x 1.75” (45 mm) H (full rack unit) 4 lb.
  • Page 46 Cet appareil numérique de la classe [A] est conforme à la norme NMB-003 du Can- ada. CE Mark – LVD and This Vortex EF2280 has been marked with the CE mark. This mark indicates compli- EMC Directive ance with EEC Directives 89/336/EEC and 73/23/EEC. A full copy of the Declara- tion of Conformity can be obtained from Polycom Ltd, 270 Bath Road, Slough, Berkshire, SL1 4DX, UK.
  • Page 47 L’Installation doit être exécutée conformément à tous les règlements nationaux appli- cable au filage électrique. Plug acts as The socket outlet to which this apparatus is connected must be installed near the Disconnect Device* equipment and must always be readily accessible © Polycom, Inc. ECHNICAL EF2280 Reference Manual ORTEX PECIFICATIONS...

  • Page 48: Conference System Design

    0 dB or less for the best results. But for difficult acoustic environments, the EF2280, as well as any of the EF products, can handle up to 10 dB room gain, which means that it offers great flexibility in your conference system design.

  • Page 49: Ef2280 Block Diagram

    EF2280 B LOCK IAGRAM EF2280 B LOCK IAGRAM Figure 30. Inside the EF2280 ® Trademark Notice: Vortex is a registered trademark of Polycom, Inc. © Polycom, Inc. EF2280 Reference Manual ORTEX...

  • Page 50: Connector Pinouts

    (Front View) ASPI BUS REMOTE CONTROL REMOTE CONTROL RS-232 EF2280 Reference Manual ORTEX EF Bus 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 m.
  • Page 51 Power Supply Input The power supply input accepts a 5-pin DIN male connector. Only use the power supply provided 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 52: Connecting Unbalanced Rca To Balanced Mini Phoenix

    Connect Phoenix pin 3 to Shield, and leave Shield floating on RCA end. EF B AKING AN ERMINATOR Figure 32. The EF2280 terminator Instructions To make a EF2280 terminator, use an RJ45 connector. Connect pin 3 to pin 6 with an 110 Ohm resistor. EF2280 Reference Manual ORTEX ALANCED Caution! Do NOT connect the shield at both ends.

  • Page 53: Additional Notes

    DDITIONAL OTES Caution! Failure to use all four screws to attach the EF2280 to the rack may result in uneven loading and cause a safety hazard. Caution! Ensure that the power supply is securely located such that it cannot become dislodged and fall. Such a fall could cause personal injury or equipment failure.

  • Page 54: Warranty Information

    Two years. What we will do If your Polycom 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. If we repair your Polycom EF2280 product, we may use new or reconditioned replacement parts.
  • Page 55 Part 779 of the Export Administration Regulations of the United States Department of Commerce. If your Polycom EF2280 product is not covered by our warranty, call us at (800) 932- 2774 or fax us at (404) 892-2512 for advice about whether we will repair your Poly- com EF2280 product and for other repair information, including charges.

  • Page 56: Definition Of Terms

    Crosspoint Mix A mix minus bus allows each device (i.e., a EF2280 unit) to create a mix of signals Minus Bus without its own. Each device in the system can create four mixes (W, X, Y, and Z) and place them on the bus.
  • Page 57 EF Bus The EF Bus is a digital bus that includes the W, X, Y, and Z audio busses as well as the echo canceller reference and remote control information. It can be used to link multiple EF2280 devices.
  • Page 58 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. EF2280 Reference Manual ORTEX EFINITION OF Technical Support: 800.932.2774...

  • Page 59: Index

    Phantom Power 6, 15, 31, 43 Phoenix Connectors 3, 4, 7, 9, 49 Pin 1 Compatible 7 Reference, AEC 2, 9, 17–18, 24, 31, 55 Remote Control. See RS-232, Serial Remote Control or Parallel Remote Control. © Polycom, Inc. EF2280 Reference Manual ORTEX NDEX...
  • Page 60 Reverberation 46 Room Gain 13, 38, 56 RS-232, Serial Remote Control 3, 4, 6, 9, 15, 24, 27, 30, 43, 48 Signal Generator 2, 3 EF2280 Reference Manual ORTEX Technical Support: 800.932.2774 NDEX...
  • Page 62 Technical Support: (800) 932-2774 vortex@polycom.com ® ® Polycom , Vortex , and the Polycom logo are registered trademarks of Polycom, Inc. in the United States and vari- ous countries. Copyright © 2002 Polycom, Inc. All rights reserved. 1725-80012-001 Rev B *1725-80012-001-B*...

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