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  1. #1
    Radar Fanatic
    Join Date
    Mar 2005
    Location
    Staffordshire, Uk
    Posts
    1,999

    Default snooper detector internals

    i was reading through the old posts and i saw a pic of some radio shack detector....... it looks the same as my snooper sd815i

    the waveguide and laser diode is the same....... but i've never had a laser alert on my snooper...





    i took the 2 screws out..... except the gunn diode one... because this was set and i knew if i messed with it i'd perminantly stuff the detector up!

    the other 2 screws were screwed all the way in so i knew i couldnt do harm...

    the result the detector didnt work!!

    i tried this out before i come to the forum......

    when i had no idea how they work! i've still just found out what a gunn diode is!!

  2. #2
    Radar Fanatic
    Join Date
    Mar 2005
    Location
    Staffordshire, Uk
    Posts
    1,999

    Default

    also it jams my neighbours satelite up some some channels!

    hows it doing this!!

  3. #3
    Yoda of Radar
    Join Date
    Dec 2004
    Location
    In front of my computer
    Posts
    10,773

    Default

    Well apparently the LO on my satellite box leaks Ka band, and most television satellite run Ku band...

  4. #4
    Advanced Member
    Join Date
    Dec 2004
    Location
    Michigan
    Posts
    7,509

    Default

    Ku Satellite(ExpressVu, Dishnet, DirecTV etc) is from 12.25 to 12.75 Ghz. In order to mix it down for receive, the LNB has a local oscillator that runs @ 11.3 GHz, which produces a harmonic in the Ka band (11.3 GHz x 3 = 33.9 GHz).

    Some detector LOs run in the 11-12 GHz range, so there is definitely the potential for interference, similar to the RDs interfering with the VSATs (SmaartAasSaabr posted a document on this recently, that can also be found On Roy's Site)

  5. #5
    Speed Demon
    Join Date
    Apr 2005
    Location
    Ft Worth Texas
    Posts
    760

    Default

    Quote Originally Posted by jimbonzzz
    Ku Satellite(ExpressVu, Dishnet, DirecTV etc) is from 12.25 to 12.75 Ghz. In order to mix it down for receive, the LNB has a local oscillator that runs @ 11.3 GHz, which produces a harmonic in the Ka band (11.3 GHz x 3 = 33.9 GHz).

    Some detector LOs run in the 11-12 GHz range, so there is definitely the potential for interference, similar to the RDs interfering with the VSATs (SmaartAasSaabr posted a document on this recently, that can also be found On Roy's Site)
    You sure do know your stuff.

 

 

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