FAQ

This page aims to answer some of the most frequently asked questions about our solutions. Click on the category and questions below to reveal the answer. If you cannot find an answer to your question, please contact us.

  • How do I label/program the channels on the Stationary Transmitter? (MV-ALS-STFM)

    Step 1: With a micro USB cable connect the transmitter to the computer that has the MV-ALS-Software installed.

    Step 2: Launch the software and in the top left hand corner you should see “Device Connected” under "Status" like the image below.
    STFM_image1.jpg


    Step 3: Next to the Status section you will see Wideband and Narrowband channels. This is where you select the channels that you’d like to have enabled on your device. By default, the first 17 channels (Wideband) are automatically enabled and labeled in alphabetical order. Based on your preference, you can choose to leave the channels labeled in alphabetical order or customize them. In this example we are only enabling channels A, C, and E. You can also change the text to whatever title you would like, up to 10 characters.
    STFM_image2.jpg



    Step 4: Once you have selected and/or labeled your channels you can proceed to update your device. In the bottom of the software next to “Read Device”, press the “Update Device” button.
    STFM_image3.jpg


    Under status the device will say “Updating…” and automatically change to “Update Successfully” once completed (figure 1.4).
    STFM_image4.jpg



    Will the Media Vision Stationary Transmitter transmit without an antenna?

    The MV-ALS-STFM requires the antenna to broadcast the RF signal it is receiving. Without the antenna the unit will not be able to transmit signal to any receiver device. We recommended ensuring the antenna is securely connected to the transmitter before powering on the device.

    Will my Stationary Transmitter work with other antennas?

    The MV-ALS-STFM can operate with antennas that are not a Media Vision model antenna as long as the device was made specifically to work on the 72-76MHz bandwidth and has a 50ohm BNC connector.

    What is the transmission range for my Media Vision Stationary Transmitter? (MV-ALS-STFM)

    The transmission range for the Stationary Transmitter (MV-ALS-STFM) in a free field setting are as follows: Stationary Transmitter (MV-ALS-STFM) with a Helical Antenna (MV-ALS-AT01) is up to 750ft. Stationary Transmitter (MV-ALS-STFM) with a Dipole Antenna (MV-ALS-AT02) is up to 1500ft.

    How do I take the feet off of the Stationary Transmitter?

    The feet are held in by plugs that are at the bottom of the Stationary Transmitter. To remove the feet, remove these plug. We recommend utilizing a flat head screw driver. To reattach them simply reinsert the plugs with the feet connected.

    How do I enable/disable channels on the Portable Transmitter (MV-ALS-PTFM)?

    Follow the steps below to Enable/Disable the channels on your device.

    Step 1: Press and hold the Power button and the + symbol at the device at the same time. The screen will display Channel Select and Channel "A" will be highlighted.

    Step 2: Press the + symbol to navigate to the channel you would like to enable or disable.

    Step 3: Press the set button (Button between the + and -) to disable or enable a channel. When the channel is enabled it will no longer be highlighted. When it is enabled it will be highlighted.

    Will the Media Vision Portable Transmitter transmit without an antenna?

    The Portable Transmitter MV-ALS-PTFM requires the antenna to broadcast the RF signal it is receiving. Without the antenna the unit will not be able to transmit signal to any receiver device. We recommended ensuring the antenna is securely connected to the transmitter before powering on the device.

    How long do the batteries last on the Portable Transmitter?

    The MV-ALS-PTFM requires the antenna to broadcast the RF signal it is receiving. Without the antenna the unit will not be able to transmit signal to any receiver device. We recommended ensuring the antenna is securely connected to the transmitter before powering on the device.

    What is the transmission range for my Portable Transmitter (MV-ALS-PTFM)?

    In a free field setting the transmission range for the Portable Transmitter (MV-ALS-PTFM) is approximately 100ft.

    How do I enable/disable channels on the MV-ALS-PRFM?

    Follow the steps below to Enable/Disable the channels on your device.

    Step 1: Press and hold the Power button and the + symbol at the device at the same time. The screen will display Channel Select and Channel A will be highlighted.

    Step 2: Press the + symbol to navigate to the channel you would like to enable or disable.

    Step3: Press the set button (Button between the + and -) to disable or enable a channel. When the channel is enabled it will no longer be highlighted. When it is enabled it will be highlighted.

    Why am I hearing audio on my MV-ALS-PRFM that is not what I’m broadcasting on my MV-ALS-STFM / MV-ALS-PTFM?

    Outside audio or noise in the system is likely due to interference occurring from another FM source having a similar frequency to the channel currently being used. To alleviate this, change the channel of use until the interference is gone. You may also want to enable narrowband channels for additional frequencies.

    Will the Media Vision Stationary Transmitter transmit without an antenna?

    The MV-ALS-STFM requires the antenna to broadcast the RF signal it is receiving. Without the antenna the unit will not be able to transmit signal to any receiver device. We recommended ensuring the antenna is securely connected to the transmitter before powering on the device.

    How long do the batteries last on the Portable Receiver?

    The MV-ALS-PRFM – 15 Hours with Two Nimh Rechargable Batteries (MV-ALS-BT02), or 30 hours with Two AA Alkaline Batteries (MV-ALS-BT01).

    Is the MV-ALS-PRFM compatible with hearing aids or cochlear devices?

    With the use of the Media Vision Neckloop (MV-ALS-EP03) our Portable Receiver is fully compatible with telecoil-equipped hearing aids. To enable this, the listener must plug the Neckloop into the Portable Receiver and place the Neckloop around their neck.

    How many transmissions am I able to have to the receiver at once?

    You are able to have six simultaneous transmissions at once.

    How many receivers can I use with your Media Vision transmitters?

    There is no limitation on how many MV-ALS-PRFM can be utilized with our transmitters.

    Is there a charger available for an individual portable receiver?

    Yes, the MV-ALS-CH01 is designed for charging the portable receiver and works with our portable transmitter as well.

    With the software am I able to program more than one device at a time?

    When you make adjustments on the Media Vision ALS software you have the capability of saving those adjustments to access whenever you want. When you have made your adjustments, at the bottom of the screen you will see "Save File".
    ALS Software image1


    Once you have saved the file, you can access it again at any point to upload those settings to another MV-ALS device by clicking "Load File" at the bottom of the software.
    ALS Software image2


    When you have a Media Vision ALS device plugged in, you simply click "Update Device" and the settings will be saved onto the device.
    ALS Software image3


    Alternatively, you can set your Media Vision software to automatically update each Media Vision Assistive Listening device when plugged in. In order to do this, scroll to the bottom of the software and check "On" under "Device auto-date", by default this feature is set to "Off".
    ALS Software image4


    What does the tone key do?

    The tone key allows MV-ALS devices to interact solely with each other, avoiding accidentally connecting to a different ALS or RF system on the 72-76MHz bandwidth. This setting can be turned off through the software allowing the user to utilize an MV-ALS-PRFM with a different FM transmitter in the 72-76MHz bandwidth. By default, this feature is enabled.
    ALS Software image5

    Is the software compatible with a mac?

    At this time the Media Vision Assistive Listeing software is not compatible with Macintosh computers.

    I cannot find the programmable software for my devices, where can I locate it?

    Please follow the steps below to obtain a copy of our MV-ALS Software:

    Step 1: Go to www.media-vision.com

    Step 2: At the top of the screen go to support.

    Step 3: Scroll down and select Assistive Listening Software.

    Step 4: Input your information and hit submit.

    Step 5: Click the download software bottom.

    You offer 57 programmable channels but which channels do you recommend I use?

    By default, your Media Vision Assistive Listening System is set exclusively on wideband channels. We strongly recommended the use of wideband channels to achieve highest quality audio signals, however to achieve multiple simultaneous channel transmissions wide and narrowband channels may need to be used.

    The Media Vision Assistive Listening System is capable of six simultaneous transmissions, but which channel do you recommend I utilize?

    For six simultaneous transmissions we recommend using the wideband channels A, C, E, I, J, and T. In the event that one of these channels have interference we suggest utilize narrowband channels as well.

    Is the Media Vision Assistive Listening System compatible with other accessories?

    The Media Vision Assistive Listening System does have the flexibility to be used with other accessories, but it depends on the type of accessory: Please refer to the bullet below to determine which MV-ALS device is compatible with the different types of accessories.

    • Each MV-ALS-PRFM (Portable Receiver) can accept an earphone that is not a Media Vision model as long as the impedance of the headphone is between 8 and 32 ohms. Please note however, each Media Vision accessory has been specially designed to maximize the reception of RF signal of the system.

    • Each MV-ALS-PRFM (Portable Receiver) can accept a neckloop that is not the Media Vision MV-ALS-EP03 as long as the impedance of the neckloop is between 8 and 32 ohms.

    • Each MV-ALS-PTFM (Portable Transmitter) can accept microphones that are not a Media Vision model as long as the connector type is an unbalanced 3.5mm. It is important to remember to set the microphone gain correctly.

    Is the Media Vision Assistive Listening System portable or stationary?

    For your convenience we offer two different types of transmitters, one stationary and the other portable. Our Portable Receiver is compatible with both devices.

    • Stationary Base Transmitter MV-ALS-STFM 72-76 MHz FM, 57 programmable channels, balanced and unbalanced inputs, balanced outputs, OLED display, access to software interface. Tabletop or rack-mounting, power cord and USB programming cable included, optional Helical or Remote Antenna needed (not included).

    • Portable Transmitter MV-ALS-PTFM 72-76 MHz FM, operating range: up to 100 feet, 57 programmable channels, settings lock, OLED display. Needed (not included): microphone, optional rechargeable or alkaline AA batteries.

    • Portable Receiver: MV-ALS-PRFM 57 programmable channels, OLED displays channel name, settings lock status, volume, signal strength and battery life. Needed (not included): earphone, headphone or neckloop, optional rechargeable or alkaline AA batteries.

    Do I need an Assistive Listening system?

    The Americans with Disabilities Act (ADA) is a law imposing accessibility requirements on public accommodations to support individuals with disabilities. The ADA requires that in each assembly area where audible communication is integral to the use of the space, an assistive listening system shall be provided. The chart below is a guide of the required amount of Assistive Listening devices based on seating. There is a free ADA Assistive Listening Compliance calculator you can download directly from our Assistive Listening web page: http://media-vision.com/en/products/assistive-listening

    For more information, please visit: https://www.ada.gov/regs2010/2010ADAStandards/2010ADAstandards.htm#pgfId-1010597 (Refer to section 219 for Assistive Listening)

    ADA Assistive Listening Compliance Chart

    What is the warranty on the Assistive Listening System?

    Our Media Vision Assistive Listening Core products (MV-ALS-STFM, MV-ALS-STFM-D, MV-ALS-PTFM, and MV-ALS-PRFM) carry a lifetime warranty against manufacture defects. Our Media Vision Assistive Listening accessories come with a 90 warranty against manufacture defects.

    I have questions regarding my MV-ALS that aren’t covered on your FAQ, what do I do?

    Please contact us by any of the following methods:

    Telephone: 1.877.746.8375
    E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
    Chat: In the bottom right hand corner of our website there is a chat/message feature. That will put you in touch with a member of our team.

  • What are the benefits of using conference microphones versus other types of microphones?

    Among their many benefits, the most important is that conference microphones increase the quality of the audio in your meeting room, and at the far site of your teleconference call.  Digital conference microphone systems allow for large numbers of microphones to be managed (up to 4,000 in one system) and installed easily minimizing the amount of cabling required.  Conference microphones also allow for additional built in functionality like the ability to cast a vote, or plug in a headphone to hear language interpretation.

    Image Video FAQ1

    What are the benefits of the onboard loudspeaker on the conference microphone?

    Collectively, the onboard loudspeaker provides a low-level even distribution of sound throughout the meeting room, giving the impression that the person speaking is right in front of you. This is often referred to as “voice lifting” and is intended to provide a higher intelligibility of the signal and a better gain before feedback ratio, due to the closeness of the speaker to the person listening. The speaker will mute when the microphone is active to avoid feedback.

    Do you have any alternatives to gooseneck microphones?

    Ah – the age old battle between aesthetics and functionality. The answer is yes we do. Depending on your application, we have boundary microphones, and microphone array units that are lower profile than our gooseneck solution. Having said that, we are still firm believers that the closer you get the microphone to the person speaking, the better quality your audio will be.

    Is there a setting allowing all mics to be active at one time?

    In a TAIDEN Conference System, the method for increasing intelligibility on the audio signal is to limit the number of open microphones. Because of this premise, conference systems do not have an “all open” mode. However, TAIDEN offers different operating modes and we recommend using the “Override” mode when in need of an “all on” option. Override means that the user will only have to press the “mic on” button to activate the microphone and if the number of open mics is at the limit, the system will simply deactivate the mic that has been on the longest. That way, the user will always be able to use the microphone whenever he wishes to speak and be heard clearly.
  • Do you provide training online and/or onsite?

    Media Vision offers both online and onsite training from our Technology Department; to learn more or schedule a session please contact This email address is being protected from spambots. You need JavaScript enabled to view it.

    Do you provide product customization for project requirements?

    Yes, we welcome the design process for creating custom units for specific project needs. While we already have a large variety of shapes, sizes and colors to choose from, we understand the need for a customized product and can support you in creating one.

    What is your warranty policy?

    All TAIDEN conference systems are covered by an industry-leading 5-year manufacturer warranty.
    Accessories, batteries, headphones, and other consumables are limited to a ninety (90) day warranty.
    The manufacturer's warranties are limited to physical defects in the materials, parts and workmanship used in making the product. Abnormal conditions, deliberate abuse and damage due to accidents, operator's error, or unauthorized service attempts are excluded from any warranty claims.
  • How many microphones can I connect to one main unit?

    Each of the TAIDEN delegate microphones draws power from the Main Unit (except our TAIDEN Digital Infrared Wireless Conference System microphones, those are battery operated) and they differ by the types of features offered. For an exact count by model number, please consult the TAIDEN manual or contact This email address is being protected from spambots. You need JavaScript enabled to view it. for help.

    How many line inputs are available on your systems?

    Each of the TAIDEN Main Units has at least 1 Line Input and depending on the model number there could be two. To learn more about the TAIDEN system components and integration options, contact our Technology Department at This email address is being protected from spambots. You need JavaScript enabled to view it. or call 415-391-9090.

    Can I combine multiple systems for multi-room configurations?

    TAIDEN Conference Systems can be linked together in multiple ways. For the wired systems, there are two categories for system combination: Combination with Booth Borrowing (Language Interpretation) and Combination without Booth Borrowing.

    Each of these categories allows for full system combination for up to 24 systems across a fiberoptic backbone. The TAIDEN wireless systems can also be combined, but use a specific hardware matrix to route the signal path of the TAIDEN Digital IR Transceivers to the appropriate TAIDEN Main Unit.
  • What are the benefits of digital infrared audio transmission over RF?

    Infrared uses light waves of 870nm making them too small to pass thru opaque surfaces and therefor making the signal inherently secure. The signal will not broadcast beyond the confines of the meeting space. Radio Frequencies, however, can broadcast thru most solid surfaces. Because Infrared is a completely separate portion of the light spectrum, there are no issues of crossover or interference from other wireless devices or systems.

    How many infrared transceivers are needed to cover a conference room?

    You must take into account the room characteristics such as ceiling height, materials (what are the walls made out of, what color are they, etc.) and even the shape of the room. You must also consider where the participants will be sitting and whether seating arrangements will change. Once this information is known, the coverage pattern of the transceivers is taken into account to determine quantities and placement. The Media Vision engineers are available to help you with this question.

    How do you connect to third party video conferencing systems?

    When selecting a VTC codec, ensure that the device has at least one audio input and one audio output. The TAIDEN Main Unit will have the same, an input and an output. Connect the output of the Main Unit to the Input of the codec and the Output of the codec to the Input of the Main Unit. Adjust levels according to the room and you are ready to use the integrated solution.
  • What are the benefits of the conference unit onboard loudspeaker?

    Collectively, the onboard loudspeaker provides a low-level even distribution of sound throughout the meeting room, giving the impression that the person speaking is right in front of you. This is often referred to as “voice lifting” and is intended to provide a higher intelligibility of the signal and a better gain before feedback ratio, due to the closeness of the speaker to the person listening. The speaker will mute when the microphone is active to avoid feedback.

    Do you provide product customization for project requirements?

    Yes, we welcome the design process for creating custom units for specific project needs. While we already have a large variety of shapes, sizes and colors to choose from, we understand the need for a customized product and can support you in creating one.

    How many microphone units can I have on one system?

    The TAIDEN 4100 Series can support up to 4096 contribution units, 10,000 channel selectors and up to 378 Interpreter Units, all on one system!

    What elements are offered to protect against system or component failure ? Are there redundancy options?

    TAIDEN wired systems have multiple layers of redundancy that can be added as options. A redundant main unit can be added to protect against system failure, and extra PC can be added as well. Contribution units can be wired in a closed loop. For the advanced Multimedia Conference System (view section 02), even the power supply and network switches can be made redundant.
  • How does the cabling topology differ between the Multimedia and the Video Monitor Solutions?

    The TAIDEN Multimedia Terminals differ from other TAIDEN wired solutions in that power is on a separate cable. Audio, video and data are transmitted across Cat6 cable and daisy chain together like a network. The power cable is tapped off from a few dedicated runs and isolated against any power failure from an individual terminal.
    The Video Monitor Delegates, on the other hand, connect the same way as other TAIDEN systems: using 6pin DIN connections to daisy chain units together.

    How do I load documents on the terminals and what are the acceptable formats?

    The TAIDEN Multimedia Conferencing System supports many file types, including: .xls, .xlsx, .txt, .doc, .docx, .pdf, .ppt, .pptx, .mp4, .jpg, .jpeg, .bmp, .gif. These documents can be loaded in two different ways, locally at the terminal or centrally at the file server. From the terminal, files can be loaded via USB drive and uploaded to the file server. Or files can be loaded directly to the file server via a PC with access to the proper drive.

    What video resolutions can the terminals display? Can the native resolution be HD?

    The native resolution of the TAIDEN Multimedia Terminal is 1280 x 800, an HD format. However, you can feed the terminals many resolutions and the device will scale appropriately. The TAIDEN HCS-8338 and 8348 terminals will allow: 1280x720p at 30, 50 and 60Hz - 1920x1080p at 30, 50 and 60Hz - 1920x1080i at 30, 50 and 60Hz
  • Is interpretation done through a computer program?

    No, you will need professional conference interpreters to carry out a multilingual meeting. Automated machine interpreting technology is at an early stage of development and is an unreliable form of communication. In situations demanding accuracy, like policy decisions and business transactions, only a human interpreter is able to understand the nuances of language. 
  • What are the benefits of using conference microphones for video teleconferencing?

    The primary benefit is the increased quality of audio both in the meeting room and at the far site. Secondarily, these microphones have the ability to steer automated pan/tilt/zoom cameras to report directly to whichever microphone has been activated.

    Alternately, we have models that include an onboard webcam that activates when the microphone turns on. Lots of choices to enhance your video teleconference experience.

Media Vision
Media Vision is a leading provider of professional audio solutions that improve intelligibility and participation for effective meetings.

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