DECA Power

Discussion in 'DIRECTV - Coax Networking (private)' started by Sixto, Aug 5, 2009.

  1. Aug 5, 2009 #1 of 25
    Sixto

    Sixto Well-Known Member

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    Shockingly noticed that our home electrical bill is a big expense these days, so spent some time with a Kill-a-Watt meter.

    Figured might as well do some DECA testing! :)

    H21-200 with no DECA: 17 watts
    H21-200 with DECA: 22 watts

    HR21-200 with no Coax attached: 24 watts
    HR21-200 with Coax and no DECA: 28 watts
    HR21-200 with Coax and DECA: 33-34 watts

    Network DECA with PI: 4 watts

    In summary, looks like DECA uses 4-6 watts depending on the config.

    BTW, since I automatically pay our electrical bill, hadn't looked at the billing for a very long time. Was shocked to see how it's been rising.

    Huge numbers at 20 cents per KWH. Summer: $400-500/mo.

    Gotta find a way to go GREEN. Starting today!
     
  2. Aug 5, 2009 #2 of 25
    hdtvfan0001

    hdtvfan0001 Well-Known Member

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    Verry interesting findings.

    ...of course at my location...I also saved some juice by being able to unplug 2 Buffalo wireless units in lieu of leaving just one Internet connection now...so that likely made up for 2 DECAs anyway...:D
     
  3. Aug 5, 2009 #3 of 25
    Spanky_Partain

    Spanky_Partain Active Member

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    So do we get a free movie for compensation of all this extra power that was used during the testing? :lol:
     
  4. Aug 5, 2009 #4 of 25
    hdtvfan0001

    hdtvfan0001 Well-Known Member

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    But that would take more power to view then....:D
     
  5. Aug 5, 2009 #5 of 25
    dettxw

    dettxw MRVing

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    So the DVR-powered DECA using more power than one with a PI?
    Interesting.
    I left off the PI as it's just one more thing to try and plug into the UPS, and the switch-connected DVR was handy as the power source. Looks like I'm paying a little bit for that convenience. :lol:
     
  6. Aug 5, 2009 #6 of 25
    Spanky_Partain

    Spanky_Partain Active Member

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    That does it. No more blue LED's. :p

    Sixto,
    But seriously. Thank you for checking the power out. That is interesting to see.
     
  7. Aug 5, 2009 #7 of 25
    jasonki32

    jasonki32 Godfather

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    Very interesting results Sixto! Thanks
     
  8. Aug 5, 2009 #8 of 25
    carl6

    carl6 Moderator Staff Member DBSTalk Club

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    I just did a little on-line searching for solar panels last week. To put in a setup that would feed "my room" (computers, monitors, DVRs, etc. ...), and only the one room, would cost me somewhere upwards of $7000. That would probably cut my electric bill in half.

    For sake of analysis, let's say I save $150 a month on my electric bill. That would come out to a break even point about 4 to 5 years out. After that I would start saving money. Of course, by then I would probably have to replace a set of batteries, so the break even moves even farther out. In fact, it may turn out that you never reach break-even (even though you do reduce demand on the mains, thus contributing to green).

    That does not take into consideration any tax breaks.

    It is pretty much the case today that you can't go green to save money, it just costs too much to get started.
     
  9. Aug 6, 2009 #9 of 25
    Sixto

    Sixto Well-Known Member

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    Thanks Carl.

    The first step (for me) was to try to understand what was consuming all the power and exactly how much.

    I did find a few items yesterday where we can reduce consumption.

    I also noticed that each DVR isn't just the $5/mo. There's actually another $4-$5 in power with our high electrical rates in this geography.

    Been a very interesting exercise so far ...
     
  10. dave29

    dave29 New Member

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    Wow, thanks for the findings. The DECA eats up a lot more power than I ever thought it would.
     
  11. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    :confused: a DECA is drawing about the same as the dish does [in non SWM mode].
    Now what's the meter show for the SWM PI?
     
  12. hdtvfan0001

    hdtvfan0001 Well-Known Member

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    That was my first thought too....makes one wonder what's just inside those little white boxes....some kind of in-line amp, or maybe something else?

    But at 4W.....hmmm....
     
  13. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    Yeah, that's going to be 11.5 Kwatts/month for what they send us.
     
  14. Sixto

    Sixto Well-Known Member

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    It was a rather simple test.

    I had the receiver plugged into the Kill-a-Watt meter.

    Then recorded watts with Coax not attached, Coax without DECA, Coax with DECA. And also measured the standalone PI powering the DECA.

    The standalone PI was a steady 4W.

    The receiver varied between 4-6W with the DECA attached.

    The DECA does cause the RJ-45 to be used. Just thinking about this, I didn't measure with hardwire Ethernet to RJ-45 to see if that makes a difference and is using part of the 4-6W.
     
  15. hdtvfan0001

    hdtvfan0001 Well-Known Member

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    VOS - I hear you have your own power grid, so what's the problem?

    Sixto -

    You come up with some of the most interesting data on the site...always making me think beyond the visible and obvious....




    Darn you! :lol:
     
  16. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    Thank god, or I wouldn't have understood. :lol:

    "What does the SWM draw" was my interest.
     
  17. Sixto

    Sixto Well-Known Member

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    Two SWM-8's.

    #1 is 14W. Has HR20-700, HR20-700, and H21-200.

    #2 is 16W. Has HR20-700, HR21-200, and H21-200. (These are the DECA test receivers).

    Was also a simple test. :)

    Unplugged PI, plugged into the Kill-a-Watt Meter, Measured.

    Did not (yet) spend any time playing with the receivers attached to the SWM-8 to see if different scenarios draw more power, such as using both tuners on each receiver.
     
  18. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

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    You have two SWM8s connected with splitters from one dish?
    If so, I wonder what one SWM draws with the other not powered up. [kind of trying to understand why there is a 2 watt difference]
     
  19. hdtvfan0001

    hdtvfan0001 Well-Known Member

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    I must continue testing....I must continue testing...I must continue testing....

    I may just be in the market for a nuclear power plant soon....wonder if eBay has any? :D
     
  20. carl6

    carl6 Moderator Staff Member DBSTalk Club

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    Just give Iran a call. I'm sure they have a spare, "for power generation only" reactor laying around.
     

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