sl3s + 21v pi + frequency sweep from 150mhz to 2150mhz

Discussion in 'DIRECTV General Discussion' started by tdbone1, Jan 21, 2019.

  1. P Smith

    P Smith Mr. FixAnything

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    Eh, c'mon , enough advertising Sonora equipment, I posted here a lot of my spectrograms, Ku and Ka...
     
  2. HoTat2

    HoTat2 Hall Of Fame

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    And "eh, c'mon" as well in return ....

    I'm not advertising for Sonora's equipment or anyone else's.

    I was only referring to the Aligent spectrum images on pages 3-6 of the document. And why we're not seeing something similar to those posted by the OP is all.

    Sent from my LG-H932 using Tapatalk
     
  3. P Smith

    P Smith Mr. FixAnything

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    ok, I'll look at my old storage to find my spectrums ...
     
  4. tdbone1

    tdbone1 Member

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    only the 13v22khz (swm16) is connected to (one) of the 4 ports on the lnbf. the other 3 cables i have disconnected.
    both the left and right Ka feed horns are covered in tin foil.
    [​IMG]
    [​IMG]
     
    Last edited: Feb 24, 2019
  5. slice1900

    slice1900 Well-Known Member

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    That second pic looks really good - exactly what you'd expect to see for the 16 odd transponders from 101, though it looks shifted a bit right (the first transponder should have a center frequency of 989 MHz)
     
  6. P Smith

    P Smith Mr. FixAnything

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    Hooray! We got first successful scan !

    Lets see if you can control your setup in full - try 18VDC and scan Ku EVEN tpns
     
  7. HoTat2

    HoTat2 Hall Of Fame

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    Yeah OK ...

    Good photo of the down-converted 950-1450 MHz Ku band ...

    I'm just still looking for an identifiable display from the OP's SDR of the usual three "haystacks" centered around 250-750 MHz (Ka-lo), 950-1450 MHz (Ku), and 1650-2150 MHz (Ka-hi). As in those Agilent diagrams ....

    Sent from my LM-V405 using Tapatalk
     
  8. slice1900

    slice1900 Well-Known Member

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    He's blocking the 99/103 feedhorns with foil, not sure why.
     
  9. tdbone1

    tdbone1 Member

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    [​IMG]
     
  10. P Smith

    P Smith Mr. FixAnything

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    Right, what I expected - some tpns are low as it's a spotbeams
     
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  11. P Smith

    P Smith Mr. FixAnything

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    Now, lets see some Ka... 250+ MHz and 1650+ MHz
     
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  12. tdbone1

    tdbone1 Member

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    was blocking both Ka feed horns because (at the time) i thought the Ka signals coming in were mixing with Ku somehow.
    i was testing with all four lnbf's going to the four swm16 connectors.
    doing this was adding alot of stuff in the spectrum and just wasnt sure what was what since i wasnt sure i was on 99, 101 and 103 since i didnt have a receiver to look at the signals on a tv.
    i do think i am on 99, 101 and 103.
    still not sure about my skew. says im supposed to 79 degrees at the dish pointing site where i enter my zip code of 52655.
    on this dish skew should the actual numbers read 79 or should they read 90+11 = 101?
    90-11= 79 which is the actual number from dish pointer site but i was thinking maybe its supposed to be 90+11=101.
    idk. just thinking out loud.
     
  13. tdbone1

    tdbone1 Member

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    should i cover up the Ku feed horn and uncover one Ka feed horn at a time?
    what voltage and khz should i couple off of?
     
  14. tdbone1

    tdbone1 Member

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    Jan 21, 2019
    all feed horns uncovered.
    SWiM16 connected to LNBF with one cable only.
    moving the cable to each port on swm16
    top to bottom:
    18v
    13v
    18v22khz
    13v22khz
    swm16 and sl3k

    i dont see the Ka Low?
    isnt it supposed to be 250mhz to 750mhz?
     
  15. P Smith

    P Smith Mr. FixAnything

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    do nothing - do not cover, do not send/change voltage/tones
    - just connect your splitter to one input of the switch (keep all four coax connected to LNBF) and
    - do scan first range 250-750, second 1650-2150
    - repeat four times for each different input of the switch
    - please post 8 graphs here
     
  16. tdbone1

    tdbone1 Member

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    these are just (4) images over the whole range but i did leave all 4 cables connected from all lnbf's to the 4 ports on swm16.
    i just moved splitter over 1 connection at a time.
    i dont see the low end from 250-750 too well.
    as i mentioned before my zip code is 52655
    should my skew be "showing" 79 degrees or 101 degrees?
    swm16_sl3k_all4_1atatime
     
  17. P Smith

    P Smith Mr. FixAnything

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    better make separate scans for each 500 MHz range - easy to compare and distinguish

    Ka-lo could be poor for you if there is just one or two SB tpn
     
  18. HoTat2

    HoTat2 Hall Of Fame

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    79° tilt for that zip code according to dishpointer.com.

    And I must admit that I still can't really make head-nor-tails of these spectural displays beyond 101w the OP posted in isolation.

    The Ka L-band "haystacks" positioned to either side of the Ku one aren't showing up well and recognizable at all.

    Strange, unless the dish is still misaligned or something ...

    Sent from my LM-V405 using Tapatalk
     
  19. slice1900

    slice1900 Well-Known Member

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    It is quite possible his dish is misaligned - much easier to get something on 101 than to fine tune it enough to bring in a strong signal on 99 & 103.
     
  20. tdbone1

    tdbone1 Member

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    Jan 21, 2019
    all 4 cables hooked up.
    tap is on the "18v" only
    bottom of picture = both Ka ports covered and Ku port open
    next reading = right Ka port open and Ku port open only
    next reading = left Ka and Ku ports open only
    last part of photo = all ports open.
    i know i need to scan the 500mhz regions only but its not exactly like 250-750 or 1650 to 2150.
    they off a bit.
     

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