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TM
Interfacing to the SoundStation VTX 1000
®
with Vortex Devices
Application Note
Polycom Installed
Voice Business Group
September 2004
Rev. F
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TABLE OF CONTENTS TABLE OF CONTENTS......................................................................................................................... 2 INTRODUCTION................................................................................................................................... 6 SUMMARY............................................................................................................................................ 7 SYSTEM OVERVIEW .......................
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8.) CONNECTING OTHER SOURCES TO A VORTEX DEVICE ...................................................... 25 Vortex Input Wiring....................................................................................................................................... 25 Balanced Input.............................................................................................................................................................25 Unbalanced Input...........................................
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Presets..........................................................................................................................................................................................61 16 Mics, 8 Loudspeakers, 2 Zones Sound Reinforcement............................................................................ 62 Introduction / Room Layout .........................................................................................................................................62 Sy
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Cable Drawing 3: Unbalanced Output to Vortex Input Connection............................................................................99 APPENDIX D: VORTEX OUTPUT WIRING .................................................................................. 100 Cable Drawing 1: Vortex Output to Balanced Input .................................................................................................100 Cable Drawing 2: Vortex Output to Unbalanced Input.................................
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INTRODUCTION TM This application note explores how to configure the SoundStation VTX 1000 to send and receive audio to a Vortex EF2280, EF2241, EF2210, or EF2211 device. The SoundStation VTX 1000 is the first voice conferencing phone to offer wideband capability over the public switched telephone network. The SoundStation VTX 1000 is capable of sending up to 7 kHz signal over a telephone line. The SoundStation VTX 1000 also has one input and one output that allows for the SoundStat
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SUMMARY If you are already familiar with Vortex devices, you may not need to read the entire application note. Here is a quick overview of the entire process: 1. Connect the microphones to the Vortex device(s). Make sure phantom power is enabled for microphones that require it. For wireless microphones, phantom power is not needed. 2. Connect the loudspeakers to the Vortex device(s). If you are connecting non-70V loudspeakers directly to the amplifier output of the Vortex EF2241, E
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SYSTEM OVERVIEW Below are three system examples that illustrate the signal flow between a Vortex device and a SoundStation VTX 1000. VOICE (NARROWBAND AND WIDEBAND) Here, a local talker uses a Vortex device and a SoundStation VTX 1000 to send audio, both narrowband and wideband, to a remote person via the Public Switched Telephone Network (PSTN). We will assume that the Remote Talker has a SoundStation VTX 1000 and can receive wideband calls. The Vortex device receives audio
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VOICE (NARROWBAND AND WIDEBAND) AND VIDEO Here, a local talker uses a Vortex device, a SoundStation VTX 1000, and a video codec to send audio to two remote people. We will assume that Remote Talker 1 has a SoundStation VTX 1000 and can receive wideband telephone calls. The Vortex device receives audio from a microphone in the local room and sends the remote speech from both sources to a loudspeaker also in the local room. The Vortex device also mixes the local speech and Remote Talker
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NARROWBAND VOICE VIA VORTEX HYBRID AND WIDEBAND VOICE THROUGH SOUNDSTATION VTX 1000 Here, a local talker uses a Vortex device, a Vortex Phone Hybrid, and a SoundStation VTX 1000 to send audio to two remote people. We will assume that Remote Talker 1 has a SoundStation VTX 1000 and can receive wideband telephone calls. We will also assume that Remote Talker 2 has a non-SoundStation VTX- 1000 (i.e. SoundStation EX) that only receives narrowband calls. The Vortex Phone Hybrid can only ma
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SYSTEM SETUP DIRECTIONS Here is a step-by-step list of directions that one should follow in setting up a conference room to work with a SoundStation VTX 1000 and a Vortex device: 1. Connect the microphones to the Vortex device(s). 2. Connect the loudspeakers to the Vortex device(s). 3. Connect the SoundStation VTX 1000 phone to a Vortex device. 4. Optionally connect a subwoofer to the Vortex device. 5. Connect the telephone line to the SoundStation VTX 1000 and Vortex device. 6.
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1.) CONNECTING A MICROPHONE TO A VORTEX DEVICE OVERVIEW DRAWING This drawing illustrates 1 tabletop microphone that is connected to Mic / Line Input 1 of a Vortex EF2280: 12
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PHYSICAL CONNECTIONS We use terminal blocks to make the audio connections to the printed circuit board. We use 3.5 mm pitch plugs. Looking left to right, the conductors are positive, negative, shield (where shield is connected to chassis ground of the Vortex device): USING WIRED MICROPHONES Most wired microphones will have a male XLR connector on the end of its cable. As a result, you will need to make a XLR to Phoenix converter cable. Connect the Positive conductor of
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If the cable that comes with the microphone is long enough to reach the Vortex device, you may cut off the male XLR connector and use wire strippers to remove the outer sheath and any shielding of the conductors. This will allow you to connect the wire directly to one of the provided Phoenix connectors. USING WIRELESS MICROPHONES All wireless microphones will require the use of a receiver to demodulate the signal. In this case, the receiver will typically have one of two types of out
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2.) CONNECTING A LOUDSPEAKER TO A VORTEX DEVICE There are two ways to connect a loudspeaker (or multiple loudspeakers) to a Vortex device: Via an amplifier or via the loudspeaker output of a Vortex EF2241, EF2210, or EF2211. If your loudspeaker has a 70V transformer on it, you will need an external amplifier to power the loudspeaker. If your loudspeaker impedance is 4-8 ohms, you may use the loudspeaker output of a Vortex EF2241, EF2210, or EF2211 to directly power the loudspeaker
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EXTERNAL AMPLIFIER Here, one of the line-level outputs of a Vortex EF2241 is sent to an amplifier to power a group of loudspeakers. EXTERNAL AMPLIFIER INPUTS All amplifiers will have one of two types of connectors: XLR or RCA: An XLR connector uses two conductors (positive and negative) and a ground line to transfer signal from one device to another device. This is referred to as "balanced". Pin 1 is shield, Pin 2 is positive, and Pin 3 is negative. An RCA connec
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"unbalanced". The signal conducting part of the connector is called "tip" and the ground line is called "shield". If the input of the amplifier has a balanced input, connect the Positive conductor of the Vortex device to Pin 2 of the XLR connector, the Negative conductor of the Vortex device to Pin 3 of the XLR connector, and the Shield of the Vortex device to the Pin 1 of the XLR connector. Refer to Cable Drawing 1 in the Vortex Output Wiring section of the Appendix. If the input o
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3.) CONNECTING THE SOUNDSTATION VTX 1000 TO A VORTEX DEVICE In order to send and receive audio to the SoundStation VTX 1000 Interface Module, you need to observe the following wiring procedure: 1.) Connect the Auxiliary Output of the Interface Module to a line level input of a Vortex device. 2.) Connect Output B the Vortex device to the Auxiliary Input of the Interface Module. By default, Outputs A, B, and C of the Vortex device is a mix-minus version of the Input B signal.
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INPUT TO INTERFACE MODULE FROM OUTPUT OF VORTEX DEVICE 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. Refer to Cable Drawing 2 in the Vortex Output Wiring section of the Appendix. OUTPUT OF INTERFACE MODULE TO INPUT OF VORTEX DEVICE Connect the Positive conductor of the Vortex device to the Tip of the RCA connector and
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A subwoofer can be used with the SoundStation VTX 1000 to enhance the low frequency response when connected to another party via wideband mode. The use of the subwoofer is optional when using the Vortex as there may be other loudspeakers in the room that you may wish to use. If you do want to use a subwoofer, you can connect an output of the Vortex directly to the subwoofer as a subwoofer typically accepts a line level input. You will need to set the output gain of the Vortex to -30 dB
