Polycom Vortex EF2241 Application Note
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Polycom Vortex EF2241 Application Note

Interfacing vortex® devices to video codecs
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Download this manual See also: Programming Manual, Reference Manual
Application Note
Polycom Installed
Voice Business Group
Revision I
September 2004
Interfacing Vortex
Video Codecs
®
Devices to

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Summary of Contents for Polycom Vortex EF2241

  • Page 1: Table Of Contents

    Interfacing Vortex Video Codecs Application Note Polycom Installed Voice Business Group Revision I September 2004 ® Devices to...

  • Page 2: Table Of Contents

    OWER TO NPUT OF PowerMic Cable Pinout... 12 POLYCOM IPOWER 900 SERIES ... 13 Connecting the iPower 900 Series Inputs and Outputs ... 13 Setting the AEC Reference Using an iPower 900... 15 Testing the Audio Inputs and Outputs ... 16 ...
  • Page 3 SP / SP384... 28 General Information... 28 POLYCOM VIEWSTATION 128 / H.323 / MP / 512 ... 28 Connecting the ViewStation 128 / H.323 / MP / 512 Inputs and Outputs... 28 Setting the AEC Reference Using a ViewStation 128 / H.323 / MP / 512 ... 30 Testing the Audio Inputs and Outputs ...
  • Page 4 FROM VSX 7000 UTPUT OF Tips for VSX 7000 ... 51 POLYCOM VSX 8000... 52 Connecting the VSX 8000 Inputs and Outputs ... 52 Enabling the VSX 8000 to work with a Vortex Device... 54 Gain Structure... 55 Microphone Levels ... 55 Gain Structure for Line Input Sources...
  • Page 5 ... 71 ATRIX IXER ... 73 RESETS Conference Composer Layout EF2201... 74 ... 74 ... 75 RESETS TECHNICAL SUPPORT... 77 Polycom Installed Voice Business group Contact Information ... 77...

  • Page 6: Polycom Ipower

    ONNECTING THE I UTPUTS In order to send and receive audio to the Polycom iPower 600 Series codec, you need to observe the following procedure: 1. Connect one of the Outputs of the Vortex Outputs A-C of the Vortex device are mix-minus versions of the Inputs’ A-C signals.
  • Page 8 4. Lower the gain on the appropriate Output of the Vortex device to -10 dB. It is important to set the gain structure correctly so that you don't clip the input audio stage of the codec and that the Vortex device gets a good signal to perform processing with.

  • Page 9: Setting The Aec Reference Using An

    AEC R ETTING THE 1. Open A (there should be a shortcut on the desktop), select the A DMIN OOLS on the A tab. De-select U UDIO NPUTS UTOMATIC ONTROL 2. Make sure that the Input to the Vortex device is assigned to the appropriate AEC Reference signal. Consult the Reference Manual for the Vortex device or the Help file in Conference Composer more information.

  • Page 10: Mic /Line Inputs

    NPUTS ATRIX IXER...

  • Page 11: Testing The Audio Inputs And Outputs

    IRING FROM I The inputs and outputs to the codec are unbalanced. We recommend keeping the cable from the Vortex device as short as possible to avoid any common-mode signals that may corrupt the audio. NPUT TO I OWER FROM...

  • Page 12: Utput Of I Ower To Nput Of Vortex Device

    Vortex device to Pin 4 of the DIN connector. Do not connect the shield of the cable to the DIN connector. The PowerMic input is unbalanced in this configuration. We recommend keeping the cable from the Vortex device as short as possible to avoid any common-mode signals that may corrupt the audio. ORTEX EVICE INOUT...

  • Page 13: Polycom Ipower 900 Series

    ONNECTING THE I UTPUTS In order to send and receive audio to the Polycom iPower 900 Series codec, you need to observe the following procedure: 1. Connect one of the Outputs of the Vortex device to the PowerMic Input of the codec. By default, Outputs A-C of the Vortex device are mix-minus versions of the Inputs’...
  • Page 14 4. Lower the gain on the appropriate Output of the Vortex device to -10 dB. It is important to set the gain structure correctly so that you don't clip the input audio stage of the codec and that the Vortex device gets a good signal to perform processing...

  • Page 15: Setting The Aec Reference Using An Ipower 900

    For simplicity, you may round that value to 10 dB. AEC R ETTING THE 1. Open AdminTools (there should be a shortcut on the desktop), select the Audio Category, and click on the Audio Inputs tab. De-select Use Echo Cancellation, Use Noise Suppression, and Use Automatic Gain Control (AGC) 2.

  • Page 16: Testing The Audio Inputs And Outputs

    ESTING THE UDIO NPUTS AND UTPUTS NPUT UTPUT ESTING Open Hardware Diagnostics. The shortcut should be located in the P ROGRAMS OLYCOM I OWER folder. Select T . To test the input to the codec, select M DMINISTRATOR NFORMATION UDIO ICROPHONE .

  • Page 17: Loopback Testing

    To test the output of the codec, select I This represents approximately 0 dB. OOPBACK ESTING In order to make a successful loopback test with the iPower 900 Series, either all ISDN lines must be connected or all ISDN lines must be disconnected. If the ISDN lines are connected or disconnected, a reboot is needed prior to making a loopback call.

  • Page 18: Wiring From Ipower To Vortex Device

    OWER TO The inputs and outputs to the codec are unbalanced. We recommend keeping the cable from the Vortex device as short as possible to avoid any common-mode signals that may corrupt the audio. NPUT TO I OWER FROM UTPUT OF If you are using CBL-LINEAUDIO, connect the Positive conductor of the Vortex device to the Tip of the RCA connector and the Negative conductor of the Vortex device to Shield of the RCA connector.

  • Page 19: Output Of I Power To Input Of Vortex Device

    Vortex device to Pin 4 of the DIN connector. Do not connect the shield of the cable to the DIN connector. The PowerMic input is unbalanced in this configuration. We recommend keeping the cable from the Vortex device as short as possible to avoid any common-mode signals that may corrupt the audio. ORTEX EVICE INOUT...

  • Page 20: Polycom Ipower 9000 Series

    ONNECTING THE I UTPUTS In order to send and receive audio to the Polycom iPower 9000 Series codec, you need to observe the following procedure: 1. Connect one of the Outputs of the Vortex device to the left channel (colored white) of Input 2. Only use the left channel of Input 2.
  • Page 21 Please follow our instructions for wiring the Vortex device to the codec. Failure to do so may induce noise into the signals sent and received from the codec.

  • Page 22: Disabling Readiness Monitor Microphone Error Messages

    6. Lower the gain on the appropriate Output of the Vortex device to -10 dB. It is important to set the gain structure correctly so that you don't clip the input audio stage of the codec and that the Vortex device gets a good signal to perform processing with.
  • Page 23 In order to disable this warning box, open A (there may be a shortcut on the desktop; otherwise, DMIN OOLS the shortcut should be located under the Administrator Information folder), select U , and click on the TILITIES tab. De-select M EADINESS ONITORING ICROPHONE...

  • Page 24: Setting The Aec Reference Using An Ipower 9000

    AEC R ETTING THE 1. Open A (there should be a shortcut on the desktop), select the A DMIN OOLS on the A tab. De-select U UDIO NPUTS UTOMATIC ONTROL 2. Make sure that the Input to the Vortex device is assigned to the appropriate AEC Reference signal. Consult the Reference Manual for the Vortex device or the Help file in Conference Composer for more information.

  • Page 25: Testing The Audio Inputs And Outputs

    ESTING THE UDIO NPUTS AND UTPUTS NPUT UTPUT ESTING Open Hardware Diagnostics. The shortcut should be located in the P ROGRAMS OLYCOM I OWER folder. Select T . To test the input to the codec, select A DMINISTRATOR NFORMATION UDIO UXILIARY UDIO You should see level activity for the left and right channels.

  • Page 26: Loopback Testing

    To test the output of the codec, select A/V B and raise the O sliders OARD ENERATED UTPUT OLUME so that they are even with the third tick mark from the top. This represents approximately -12 dB. OOPBACK ESTING In order to run this test you simply press the Call Add Button as you would with any other test call and you dial a string 0000000 (Seven Zeros) and then press the Call Now Button.

  • Page 27: Wiring From Ipower To Vortex Device

    IRING FROM I The inputs and outputs to the codec are unbalanced. We recommend keeping the cable from the Vortex device as short as possible to avoid any common-mode signals that may corrupt the audio. NPUT TO I OWER FROM...

  • Page 28: Polycom Viewstation ® Sp / Sp384

    512 I NPUTS AND In order to send and receive audio to the Polycom ViewStation 128, H.323, MP, or 512 codec, you need to observe the following procedure: 1. Make sure that the ViewStation codec has firmware version 7.5 or higher installed in it. You can find this information on the System Info page.
  • Page 29 Follow the diagram below to make the proper physical connections to the codec. Do not use any other audio inputs or outputs as they could cause an audio loopback to occur within the codec.

  • Page 30: Setting The Aec Reference Using A Viewstation 128 / H.323 / Mp / 512

    4. Lower the gain on the appropriate Output of the Vortex device to -10 dB. It is important to set the gain structure correctly so that you don't clip the input audio stage of the codec and that the Vortex device gets a good signal to perform processing with.

  • Page 31: Testing The Audio Inputs And Outputs

    ESTING THE UDIO 1. Go to S YSTEM DMIN You must enable the codec's internal echo canceller in order for the audio meter described in Step 2 to work properly. 2. Go to S YSTEM IAGNOSTICS Your level should be around 0 on the meter. You may also use the loop-back feature to listen to your own audio in the local room.

  • Page 32: Utput Of View Tation Codec To

    Vortex device via the input and output audio cables, a loopback will occur in the codec. This means that a portion of the audio signal that is sent to the codec from the Vortex device will be coupled into the signal that is sent from the codec to the Vortex device.

  • Page 33: Polycom Viewstation Ex

    ONNECTING THE UTPUTS In order to send and receive audio to the Polycom ViewStation EX codec, you need to observe the following procedure: 2. Connect one of the Outputs of the Vortex device to the mixer input of the codec. By default, Outputs A-C of the Vortex device are mix-minus versions of the Inputs A-C signals.
  • Page 34 You may connect either the left or the right channel of the auxiliary line level output to the Vortex device. Any audio that is sent from the far side will be monaural. Please follow our instructions for wiring the Vortex device to the codec (See “Wiring from ViewStation EX to Vortex device”).

  • Page 35: Setting The Aec Reference Using A Viewstation Ex

    6. Lower the gain on the appropriate Output of the Vortex device to -10 dB. It is important to set the gain structure correctly so that you don't clip the input audio stage of the codec and that the Vortex device gets a good signal to perform processing with.

  • Page 36: Wiring From Viewstation Ex To Vortex Device

    IPS FOR TATION 1. The volume control for the ViewStation EX controls the incoming far side audio and the local tone generator. It does not, however, control the sound effects inside the units such as incoming call ring and the female speech that occurs when you dial a number. This is important to note because if the volume control is very low, it may appear that the codec audio is operating correctly because the sound effects are still generated and will be heard in the local room.

  • Page 37: Polycom Viewstation Fx

    ONNECTING THE UTPUTS In order to send and receive audio to the Polycom ViewStation FX codec, you need to observe the following procedure: 1. Connect one of the Outputs of the Vortex device to the mixer input of the codec. By default, Outputs A-C of the Vortex device are mix-minus versions of the Inputs A-C signals.
  • Page 38 You may connect either the left or the right channel of the auxiliary line level output to the Vortex device. Any audio that is sent from the far side will be monaural. Please follow our instructions for wiring the Vortex device to the codec (See “Wiring from ViewStation FX to Vortex device”).

  • Page 39: Setting The Aec Reference Using A Viewstation Fx

    4. Lower the gain on the appropriate Output of the Vortex device to -10 dB. It is important to set the gain structure correctly so that you don't clip the input audio stage of the codec and that the Vortex device gets a good signal to perform processing with.

  • Page 40: Wiring From Viewstation Fx To Vortex Device

    IRING FROM The inputs and outputs to most codecs are unbalanced. We recommend keeping the cable from the Vortex device as short as possible to avoid any common-mode signals that may corrupt the audio. NPUT TO TATION Connect the Positive conductor of the Vortex device to the Tip of the RCA connector and the Negative conductor of the Vortex device to Shield of the RCA connector.

  • Page 41: Tips For Viewstation Fx

    Vortex device via the input and output audio cables, a loopback will occur in the codec. This means that a portion of the audio signal that is sent to the codec from the Vortex device will be coupled into the signal that is sent from the codec to the Vortex device.

  • Page 42: Polycom Vs4000

    Polycom VS4000 ONNECTING THE In order to send and receive audio to the Polycom VS4000 codec, you need to observe the following procedure: 1. Connect one of the Outputs of the Vortex device to the mixer input of the codec. By default, Outputs A-C of the Vortex device are mix-minus versions of the Inputs A-C signals.

  • Page 44: Setting The Aec Reference Using Avs4000

    4. Lower the gain on the appropriate Output of the Vortex device to -10 dB. It is important to set the gain structure correctly so that you don't clip the input audio stage of the codec and that the Vortex device gets a good signal to perform processing with.

  • Page 45: Testing The Audio Inputs And Outputs

    ESTING THE UDIO 1. Go to S YSTEM DMIN You must enable the codec's internal echo canceller in order for the audio meter described in Step 2 to work properly. 2. Go to S YSTEM IAGNOSTICS Your level should be around 0 on the meter. You may also use the loop-back feature to listen to your own audio in the local room.

  • Page 46: Output Of Vs4000 To Input Of Vortex Device

    This is important to note because if the volume control is very low, it may appear that the codec audio is fine because the sound effects are still generated and will be heard in the local room.

  • Page 47: Polycom Vsx

    Polycom VSX ONNECTING THE In order to send and receive audio to the Polycom VSX 7000 codec, you need to observe the following procedure: 1. Connect one of the Outputs of the Vortex device to the mixer Input of the codec. By default, Outputs A-C of the Vortex device are mix-minus versions of the Inputs A-C signals.

  • Page 49: Enabling The Vsx 7000 To Work With A Vortex Device

    4. Lower the gain on the appropriate Output of the Vortex device to -10 dB. It is important to set the gain structure correctly so that you don't clip the input audio stage of the codec and that the Vortex device gets a good signal to perform processing with.

  • Page 50: Testing The Audio Inputs And Outputs

    ESTING THE UDIO 1. Go to System, Diagnostics, Audio, Audio Meter and then speak into one of the microphones. Your level should be around 0 on the Line Input meter. You may also use the loop-back feature to listen to your own audio in the local room. That feature is under System, Diagnostics, Network, Near End Loop.

  • Page 51: Tips For Vsx 7000

    Vortex device via the input and output audio cables, a loopback will occur in the codec. This means that a portion of the audio signal that is sent to the codec from the Vortex device will be coupled into the signal that is sent from the codec to the Vortex device. This will cause the local room to hear a reinforced version of their own speech via the local room loudspeakers.

  • Page 52: Polycom Vsx 8000

    VSX 8000 I ONNECTING THE In order to send and receive audio to the Polycom VSX 8000 codec, you need to connect the system as shown in Error! Reference source not found. and described below. 1. Connect one of the Outputs of the Vortex device to the mixer Input of the codec. By default, Outputs A, B, or C of the Vortex device are mix-minus versions of the Inputs A, B, or C signals, respectively.
  • Page 53 Connecting the VSX 8000 to a Vortex EF2241...

  • Page 54: Enabling The Vsx 8000 To Work With A Vortex Device

    You may use either the left or right channels for sending and receiving monaural audio to the VSX 8000. For stereo operation, both the left and right channels must be used. Please follow our instructions for wiring the Vortex device to the codec (See the section...

  • Page 55: Gain Structure

    Gooseneck Wireless *Some wireless receivers transmit audio at line level (approximately 0 to -10 dB) and others transmit at mic level (approximately -30 dB). Based on the transmit level, you may need to apply gain in the Vortex Device. For example, if a wireless receiver's nominal transmit level is -10 dB, you will need to apply +10 dB on the input of the Vortex Device to achieve unity (0 dB) gain.

  • Page 56: Gain Structure For Line Input Sources

    0 dB on the B listen to your own audio in the local room. That feature is under S 2. Go to System Info, Diagnostics, Audio, Speaker Test to listen to a codec-generated 400 Hz tone. NPUT...

  • Page 57: Controlling A Vortex Device Via The Vsx 8000

    VSX 8000 ONTROLLING A ORTEX EVICE VIA THE When connected via an RS-232 cable to the VSX 8000, a Vortex Device can be controlled via the Mute button of the Remote Control of the VSX 8000. When the Mute button is pushed to mute the VSX8000, the VSX 8000 will send ***MACROX180 to Serial Port 1 or Serial Port 2.

  • Page 58: Create The Appropriate Macros In The Vortex Device(S) Muting

    As previously mentioned, the Mute button on the Remote Control sends a command to execute Macro 180 and Macro 181. Here is an example of how to write Muting Macros for a system with 4 microphones and an EF2241: First, label Macro 180 as "Mute" and Macro 181 as "Unmute":...

  • Page 59: Volume Control (Codec Only)

    Next, insert the muting command for Input 1. Click Insert Command, Input, 1, Mute, On: If you are successful, you should see this in the window: Repeat this process for Inputs 2-4. When you are done, you should see this: For Macro 181, repeat the same steps as for Macro 180 except that the Mute for Inputs 1-4 should be off.
  • Page 60 the VSX 8000 User Interface, go to S , and select N twice for Page YSTEM DMIN ETTINGS UDIO ETTINGS 3. Select the F option for Output Mode. Set the Level setting to 5. IXED As previously mentioned, the Volume Up / Down buttons on the Remote Control send a command to execute Macro 183 and Macro 184.
  • Page 61 If you are successful, you should see this in the window: Next, add the cross-point control for R1. Click Insert Command, Matrix, A (“From VSX 8000”), R1 (“Reference 1”), Gain, +, 1 dB: If you are successful, you should see this in the window:...

  • Page 62: Volume Control (Codec And Telephone)

    ONTROL If the Vortex Device to be controlled has a built in telephone hybrid (such as the Vortex EF2241) or if the Vortex Device is linked via the EFBus to another Vortex Device that does have a built in telephone hybrid, the Volume Up / Down buttons of the VSX 8000 remote control can also control that volume.

  • Page 63: Verify That The Vsx 8000 Remote Control Properly Controls The Vortex Device

    ORTEX EVICE If there is only one Vortex Device, go to System, Diagnostics, Audio, Audio Meter in the VSX 8000 User Interface and first verify that there is activity on the Balanced In meter by talking into one of the microphones.
  • Page 64 Repeat the process for the Volume Up and Volume Down buttons if you have assigned commands to Macro’s 183 and 184. For more information on setting up the VSX 8000 with a Vortex device, including stereo operation, gated mixer settings and more, please see the Application Note “Vortex/VSX 8000 Integration.”...

  • Page 65: Other Video Codecs

    ONNECTING THE In order to send and receive audio to the video codec, you need to observe the following procedure: 1. Connect one of the Outputs of the Vortex device to the Input of the codec. By default, Outputs A-C of the Vortex device are mix-minus versions of the Inputs A-C signals.

  • Page 66: Wiring From Codec To Vortex Device

    ODEC TO The inputs and outputs to most codecs are unbalanced. We recommend keeping the cable from the Vortex device as short as possible to avoid any common-mode signals that may corrupt the audio. NPUT TO ODEC FROM UTPUT OF Connect the Positive conductor of the Vortex device to the Tip of the RCA connector and the Negative conductor of the Vortex device to Shield of the RCA connector.

  • Page 67: Output Of Codec To Input Of Vortex Device

    UTPUT OF ODEC TO NPUT OF ORTEX EVICE Connect the Positive conductor of the Vortex device to the Tip of the RCA connector and the Negative conductor of the Vortex device to Shield of the RCA connector. The shield of the cable is not connected.

  • Page 68: System Example

    This example illustrates a 24 ft. X 38 ft. X 10 ft. conference room that has 8 tabletop microphones and 6 ceiling loudspeakers. The system includes a EF2280 matrix mixer, an EF2201 telephone hybrid, a video codec, and a program audio source. There is no sound reinforcement in this room.

  • Page 69: System Layout

    YSTEM AYOUT The audio components for the room are 8 tabletop microphones, 1 EF2280, 1 EF2201, 1 video codec, 1 amplifier, 1 program audio source, and 6 ceiling loudspeakers. Each of the microphones will use Inputs 1- 8. The video codec will use Input B / Output B. The program source will use Inputs B and C. The amplifier...

  • Page 70: Conference Composer Layout Ef2280

    EF2280 ONFERENCE OMPOSER AYOUT Most of the default parameters of the EF2280 will satisfy our design such as microphone gains and automixer settings. However, we will need to re-label the EFBus for clarity and change the Matrix Mixer and Presets to satisfy our design goals.

  • Page 71: Matrix Mixer

    Since the EF2201 uses the P Bus to send telephone audio to the EF2280 and the ID of the EF2201 is 00, the audio signal PB0 needs to be routed to Input PM0 of the EF2280.
  • Page 72 Local Microphones should NEVER be included the reference signal!

  • Page 73: Resets

    RESETS In order to permanently save the settings to the EF2280, you must use a User Preset. Here, we've used Preset 16, although you may use any of the User Presets 16-47 to accomplish this task. We've also renamed User Preset 16 to Conference Room. Once the User Preset has been saved, you must also change the Power on Preset to reflect the proper Preset that you want the unit to power up to if the unit loses AC power.

  • Page 74: Conference Composer Layout Ef2201

    EF2201 ONFERENCE OMPOSER AYOUT Most of the default parameters of the EF2201 will satisfy our design such as microphone gains and automixer settings. However, we will need to need to re-label the EFBus for clarity and change Presets to satisfy our design goals.

  • Page 75: Resets

    Since the EF2280 uses the W and Y buses to send microphone, codec, and program audio to the EF2201 and the ID of the EF2280 is 00, the audio signals WB0 and YB0 need to be routed to Inputs WM0 and YM0 of the EF2280.
  • Page 76 In order to permanently save the settings to the EF2201, you must use a User Preset. Here, we've used Preset 16, although you may use any of the User Presets 16-47 to accomplish this task. We've also renamed User Preset 16 to Conference Room. Once the User Preset has been saved, you must also change the Power on Preset to reflect the proper Preset that you want the unit to power up to if the unit loses AC power.

  • Page 77: Technical Support

    Polycom, the Polycom logo, Vortex, and ViewStation are registered trademarks and Conference Composer, VS4000, iPower and VSX are trademarks of Polycom, Inc. in the USA and various countries. All other brand names, product names and trademarks are the sole property of their respective owners. Rev. I 09/04.

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