What's in this USB cable?
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  1. #1
    Join Date
    Dec 2004
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    What's in this USB cable?

    I just got a stereo that can use a USB cable connection. The only USB cable I have is one that came with an old Canon Scanner I have. The USB cable(2.0) has a round cylinder compartment that I can't open on the end of it. The Scanner that it came from had it's own power supply. Is this thing on the USB cord a fuse or some kind of voltage converter?

  2. #2
    Join Date
    Jan 2002
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    you've been nominated

  3. #3
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    Dec 2004
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    I called Canon tech support and they said that it is an RF filter... what exactly would an RF filter do on a USB cord?

  4. #4
    Join Date
    Jul 2007
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    Quote Originally Posted by dman777
    I called Canon tech support and they said that it is an RF filter... what exactly would an RF filter do on a USB cord?
    An RF filter will block a band of Radio Frequencies (noise): this is useful because this band of noise will interfer with the communications between the device and the PC.

  5. #5
    Join Date
    Nov 2008
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    2

    RF Filter = RF and microwave filter

    RF and Microwave filters represent a class of Electronic filters.
    The RF Filter is designed to operate on signals in the Medium to Extreme high frequencies.

    http://www.oscilent.com/catalog/Cate...saw_filter.htm

  6. #6
    Join Date
    Feb 2003
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    those filters help stop EMI interference from other electrical devices. Without it, you might pick up humming/buzzing through your new stereo's speakers, from other nearby wires/leads.
    Windows 7 x64 Ultimate Edition, Gigabyte Z77-D3H, Ivy Bridge i7 3770, nVidia GTX480 1.5Gb, 16Gb Corsair 1600MHz, Creative X-Fi, Seagate 500Gb SATA II, DGM 23" Widescreen TFT

    "Men never do evil so completely and cheerfully as when they do it from religious conviction" -Blaise Pascal

    M.C.S.A.

  7. #7
    Join Date
    Jun 2000
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    Montreal, Que, Canada
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    RF stands for Radio Frequencies.

    http://www.arrl.org/tis/info/rf-filter.html
    Gilles Lussier

    HWC Folding@Home Team

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