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Wirless Mic Channels

Discussion in 'Sound, Music, and Intercom' started by krhodus, Nov 28, 2006.

  1. krhodus

    krhodus Member

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    Location:
    Dublin, OH
    We just got in the new rack of the ULX's the night before opening night. In a mad rush to get them setup and out to actors I just set them on group 1 and went channels 1-6. Tonight after rehersal I am going to draw out frequencies to select from. For the show, we are going to run 18 mics. We have 6 Shure UC's, 6 SLX's, and 6 ULX's. What is the best way to balance them out so they don't all collide. We are in Dublin, OH (a subarb right outside of Columbus)

    Thanks!
    Kevin
     
    Last edited: Nov 28, 2006
  2. TechiesRule

    TechiesRule Member

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    Location:
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    so i take it you use a digital board?
     
  3. ulze

    ulze Member

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    Location:
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    there are many programms that manage wireless systems and their frequences!
     
  4. mbenonis

    mbenonis Wireless Guy Administrator

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    Occupation:
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    Location:
    Washington, DC
    I'm not sure where the original poster said anything about a digital board...

    In order to avoid problems, you need to use a program to do intermodulation calculations. The information you'll need is the frequency range and frequency steps each system offers. For instance, the ULX is available in the J1 and M1 range (M1 = 662-698 MHz, I don't know what the J1 is off of the top of my head). The SLX is available in H5 and another one I believe. Both the ULX and SLX can step in 25 kHz increments. I'm not very familar with the UC series, but this information is in the manual and on Shure's website.

    You'll also need a list of TV stations in your area, both analog and digital. This information can be gleaned from a number of sources, but a sure bet is the FCC website <http://www.fcc.gov/mb/video/tvq.html>. Just search for stations within about 50-75 miles of your location.

    The best program currently available to do these calculations is Sennheiser's SIFM application, which is available at Sennehiser's website for free <http://www.sennheiser.com/sennheiser/icm_eng.nsf/root/products_wireless-systems_sifm_software>. Plug in your frequency blocks, step increments, and local TV stations, and walla, out pop usuable frequencies. For the ULX and SLX you'll need to enter into manual mode and enter the frequency directly. There is a table of frequencies in the SLX and ULX manuals.

    While the program is very good and should work, the real world isn't always perfect and you should check your mics thoroughly before the show starts. Henry Cohen of Production Radio Rentals recently posted some great advice (with reference to another person's wireless issues) to the Theatre-Sound mailing list:

    Let us know how things go, and don't hesistate to ask if you have more questions.
     
    Last edited: Nov 29, 2006
  5. TechiesRule

    TechiesRule Member

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    Location:
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    i was assuming that theydo have digital. they said "group 1" i'm not entirly sure though.
     
  6. mbenonis

    mbenonis Wireless Guy Administrator

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    Occupation:
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    By Group 1, the original poster was referring to Shure's preset groups of channels in the ULX system.
     
  7. TechiesRule

    TechiesRule Member

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    Location:
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    oh ok I see
    Thanks for clearing that up for me!!
     

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