Transponder Maps ~ Data 9/23/2020

Discussion in 'DIRECTV Tips and Resources' started by Gary Toma, Dec 26, 2012.

  1. HoTat2

    HoTat2 Hall Of Fame

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    No rule I can detect ...

    Just an apparently random fluctuation on the individual S.S. meters as well like I explained in post # 2072.

    Just that the meters seem to track the average signal value much more and not follow the peaks and valleys like the signal level grid display does.

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  2. P Smith

    P Smith Mr. FixAnything

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    then we need to find someone with SW or TH1020A card and get TSReader's SS/SQ plotting ...
     
  3. Nighthawk68

    Nighthawk68 Godfather

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    Just an FYI, 92-93 over a 4 minute span, I am in Northern Michigan
    All 16 99ca transponders vary from 86-94
     
  4. Gary Toma

    Gary Toma UNIX

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    More weirdness: I have been away for the past five days and have just returned to the TPN-10 issue.

    But the symptoms have changed:
    • the SS values for all the 99CA transponders are now much more stable, with little variance from one 6-second scan to the next
    • the SS value for TPN-10 is still significantly lower than all the other TPNs, but it too is more stable or consistent
    • the SS value for TPN-10 now has a low of 64 within a few minute period of tracking, 68 is the high
    • the SS values for all but TPN-10 are about 10 points lower than a week ago; they are all mid 80s now instead of mid 90s last week
    It will be interesting to see if the Los Angeles folks are seeing these same symptom changes....

    TPN_10.JPG
     
    Last edited: Apr 27, 2017
  5. HoTat2

    HoTat2 Hall Of Fame

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    Still bouncing to somewhere within a span from the high 40s to the low 60s here between screen refreshes.

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  6. tomspeer46

    tomspeer46 Legend

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    99ca is pretty steady here on the east coast. TPN 10 is strongest at 98. Odd TPNs
    read 93-95, Even ones 96 to 98. Readings vary within 1 point
     
  7. inkahauts

    inkahauts Well-Known Member

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    I saw they are still getting some new uplink sites working in Bakersfield. Maybe they will be switching some things around to fix this issue?
     
  8. P Smith

    P Smith Mr. FixAnything

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    uplink faulty ? nay
    it's downlink RF signal, eg sat's transponder
     
    Last edited: Apr 28, 2017
  9. tomspeer46

    tomspeer46 Legend

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    If it is a transponder antenna pattern issue, I would expect problems going north along the West Coast. If it is some sort of local interference issue, then the SS (actually CNR) should improve going north.
     
  10. slice1900

    slice1900 Well-Known Member

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    But individual transponders don't have their own antennas. There isn't a mechanism I'm aware of that a single transponder could have a different antenna pattern than the other 99ca even tpns.
     
  11. James Long

    James Long Ready for Uplink! Staff Member Super Moderator

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    Is the signal strength screen programmable by location? For example, having "N/A" show up for spotbeams not expected to be received in one location while a number would show if the receiver was set for another location?
     
  12. slice1900

    slice1900 Well-Known Member

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    No, you get the same one everywhere. So on the 99s/103s screen you see a lot of 0 or low readings for spot beam transponders that aren't aimed your way. This would require not only programming it differently for different locations, but using a different scale for one transponder depending on location. While they obviously COULD do that if they felt like it, it is impossible to see any reason why they would want to - especially to make a reading look lower in a certain area.

    I still think there's gotta be some sort of regional interference with the reception of that one transponder. The whole range for even transponders 10-22 is broadcast as a group, so one can't be originate lower than the others for a certain area for the country. It has to be on the reception side.

    The D14 writeup didn't include details of the filtering, but D12's did:

    For the national beam, two different types of filters are used. Each national channel is individually filtered with a 36 MHz channel filter, the simulated response of which is shown as Figure 5-2. In addition, the ensemble of eight adjacent national transponders is filtered with a wideband filter, with a simulated response shown as Figure 5-3.

    As you can see from this, the transponders are individually filtered, then after the output multiplexer, the whole group are filtered together - and therefore broadcast together.
     
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  13. inkahauts

    inkahauts Well-Known Member

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    Yes and they do that. Here in Los Angeles we see a lot of NA for spots that are not for our area. However I don't believe they actually do that for every market.

    Not sure how they determine it, could be based on account.
     
  14. James Long

    James Long Ready for Uplink! Staff Member Super Moderator

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    Ok ...
     
  15. tomspeer46

    tomspeer46 Legend

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    As far as I can tell, Los Angeles is the only market that has that "feature". It saves time trying to tune to a lot of transponders that won't get a lock when doing the SS screens, and all the DTV execs were in the LA area when that feature was implemented. Draw your own conclusions.
     
  16. HoTat2

    HoTat2 Hall Of Fame

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    Here in the LA market at least, all CONUS beam tp. levels are visable on all bands at all receivable satellite positions as with any other market. As are all DBS Ku local spotbeam tp. levels at 101W and 119W.

    However, for the Ka band local spotbeam levels at 99W and 103W only tps. 19 and 21 at 99W and tps. 19, 21, and 22 at 103W are visable.

    (Except for the big four, all local channels for our market are on the 103W spotbeam tps.)

    All other tp. levels on the 99(s) and 103(s) signal strength screens are marked as "N/A."



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  17. slice1900

    slice1900 Well-Known Member

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    Was it the execs or the engineers? The execs probably don't spend a lot of time in the signal strength screens... :rolleyes:
     
  18. P Smith

    P Smith Mr. FixAnything

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    Headquarter is there anyway.
     
  19. James Long

    James Long Ready for Uplink! Staff Member Super Moderator

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    OK ... my thought is that if DIRECTV tweeked the signal strength screens for the LA area and LA area subscribers are the only ones seeing a problem on TP 10 then the fluctuation in signal could be related to the tweek.

    Other than that, I'd expect it to be interference that is somehow only affecting the LA area.
     
  20. HoTat2

    HoTat2 Hall Of Fame

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    Well Gary has the issue and is actually to our south in the San Diego market, which granted is probably close enough to the LA area to be considered within it.

    Though I would like to hear from subs in markets close by to the north such as Santa Barbara and Bakersfield. As well as to the immediate east such as Palm Springs and Las Vegas.

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