I/F frequencies and bandwidths

Discussion in 'DIRECTV General Discussion' started by 423rightnow, Oct 5, 2011.

  1. 423rightnow

    423rightnow New Member

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    Oct 5, 2011
    Hi...Does anybody know where I can find a table I/F and B Band frequencies for directv? I have a SWM5 array and want to peak the dish out with a Sspectrum analyzer rather than the level meters on the tv screen. The analyzer is good out to C band so I know it'll handle anything in L or B bands it would be a lot faster this way.

    Thanks in advance :)
     
  2. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    The SWM5 has an AGC that will mask peaking the dish, so use the input to the SWM5 instead.
    The Ka bands are 250-750 MHz & 1650-2150 MHz. Odd & even transponders are selected [powered] by 13 & 18 volts. Changing to the 103, 119 SATs is done with a 22 khz tone.
    "Would guess" using a power passing splitter would be needed, so the SWM5 powers the LNB, and the blocked port for the SA.
    The 101 Ku are 950-1450 MHz [no tone].

    The SWM5 outputs start at 978 MHz, with 100 MHz BW.
     
  3. HoTat2

    HoTat2 Hall Of Fame

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    Los...
    Minor point, but my SiWM technical training document actually has the CG SWiM carrier center frequency as 974 MHz for both the SWiM-5 and 8.

    Is this document incorrect?
     
  4. 423rightnow

    423rightnow New Member

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    Oct 5, 2011
    This is excellent news
    Yes...I had planned on a power splitter with the SA on the blocked port. I can have wife unit switch 103 and 119 from the receiver, that will take care of the 22KHz tone switching.
    I'm not worried about transponder switching an LHC/RHC polarity
    For the most part, I'm thinking that if I center up in the middle of the I/F and set the BW to capture all I/Fs on the particular bird i'm looking at, it should pretty much cover everything.

    Thanks very much
     
  5. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    No but my mind didn't care, so I winged it as was off by 4 MHz. ;) :lol:
     
  6. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    If you're going off the SWM5 inputs, "the wife" won't be doing anything.
    The four inputs are powered by the SWM5, so you'll be changing inputs for the SATs.

    101 = 950-1450 on the 13 & 18 volt inputs.
    99 = 250-750 on the same inputs.
    103 = 250-750 on the 13 & 18 22 Khz inputs.
    119 = 950-1450 on ^

    There isn't any need to look at the 1650-2150 band.
     

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