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AM21 Tuner w/ HR24-100 - how does it work?

Discussion in 'DIRECTV General Discussion' started by Vespa, Apr 1, 2012.

  1. Vespa

    Vespa New Member

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    May 27, 2007
    (not sure what the right forum is for this post. Mods, please feel free to move it if necessary)

    I currently have an HR24-100, and I am moving the receiver back and forth between two homes to take care of family.

    These two homes are in two different markets very far apart.

    At one location (let's call it A) I am currently receiving programming for the LA Market (the national feed) but when I return to my other location (let's call it B) instead of calling DirectTV to move the service address can I just purchase an AM21 tuner and use that to get the OTA signal for locals? (there are quite a few locals that are available.) I'd still like to receive the LA stations (while in B) I am already provisioned for via the satellite, as well as the local stations via the AM21/OTA signal.

    Will the locals just show up in the guide natively where I can record etc.? How does DirecTV now (or don't they) if I am receiving OTA stations? How does the programming come in for the stations to the guide? How does the guide 'know' to pull that down?

    I bounce back and forth between the two, so I'd raher not have to call DirecTV a couple times a month to switch service addresses.

    Thx
     
  2. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    Dec 9, 2006
    Let's just address the AM-21.
    You setup your OTA stations, by entering a zipcode, which will then give you a market area. You select the market and through the SAT feed, the channels that you might get are downloaded. You then select which ones you can get or want to get.
    Add these into you favorite guide and you'll see these as xx-1,-2, etc.
    Should you enter a zipcode that is "say" across the country from where you are, it still works the same, though [DUH] you won't get any channels.
     
  3. Vespa

    Vespa New Member

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    May 27, 2007
    Thanks - so where does the guide data come from for the OTA stations? Via DirectTV?
     
  4. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    Dec 9, 2006
    yes, through the SAT like the other channel guide data comes.
     
  5. Vespa

    Vespa New Member

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    May 27, 2007
    Got it. So in effect, what I outline in my original post above should work. Assuming I can receive those channels OTA.
     
  6. Skram0

    Skram0 Cool Member

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    May 3, 2010
    If I could hijack this thread for a second, but staying on topic.
    How does the AM21 & HR24 technically work?

    One of my locals transmits in 1080i. When I tune my plasma TV to the channel using an antenna, it looks great. But I do see some sort of (bad or lacking deinterlacing?) because the scrolling news text at the bottom of the screen has jaggie lines when it moves. I know it's an issue to view interlaced material on a non-interlaced screen.

    When I tune to the channel through DirecTV the quality does look worse, slight compression and color bleed on news graphics, but the text at the bottom scrolls smoothly, even though my HR24 and TV are both in 1080i mode.

    Questions:
    1) Does the AM21 tune in and output the exact quality as any other OTA tuner?

    2) If I were to use an HR24 to record an AM21 local channel, does the HR24 record the exact AM21 OTA output? Or is it a slightly compressed recording?

    3) Playing back a recorded AM21 1080i channel, will the HR24 output the same quality just as if it's being watched live through the TV using an OTA antenna, jaggies and all?

    TIA if anyone could shed some light on the technical functionality of an AM21 to HR24 to TV.
     
  7. CCarncross

    CCarncross Hall Of Fame

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    Jul 19, 2005
    Jackson
    Depending on the settings you have for the picture output on your HR24, the AM21 should look identical to your tv's OTA picture.

    The AM21 sends the signal to your HR24, whereas the local you get through D* might be being converted to MPEG4 and that may be where you are noticing the differences. I can assure you though that the HR24 is recording exactly what the AM21 sends it...
     
  8. Skram0

    Skram0 Cool Member

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    May 3, 2010
    Cool, thank you for the confirmation. It's hard to find this kind of information. All you can do is guess and hope what it's actually doing in the background. Because I do record some shows from Fox, CBS, etc., and I do want the best viewing quality possible. So I am thinking about this upgrade with either of the below indoor/outdoor antennas from Monoprice.

    http://www.monoprice.com/products/product.asp?p_id=7976
    http://www.monoprice.com/products/product.asp?p_id=4730

    But I suppose there are drawbacks. If it's recording exactly what's being broadcast OTA, then I'm sure it'll use more hard drive space. If it does or does not it shouldn't bother me as I keep my recordings slimmed down anyway.
     
  9. CCarncross

    CCarncross Hall Of Fame

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    Jackson
    Yes, recordings from OTA take approximately 1.5 times the space because they are MPEG2 instead of D* mpeg4...and higher bandwidth in most cases depending on the number of sub-channels a station may use.
     

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