1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

How To Modulate a H24

Discussion in 'DIRECTV Installation/MDU Discussion' started by jdogi70, Feb 15, 2012.

  1. jdogi70

    jdogi70 Mentor

    49
    0
    Jun 3, 2008
    Los Angeles
    Hello all i am trying to find out if its possible to modulate a H24 receiver. i have a big job at the Gibson amphitheater and they want 2 feeds to their tvs in the dressing rooms directv and a show feed using the existing coax does anyone know of any type of modulator so all they have to do is hit the input on their remote instead of going through this big ol hassle.
     
  2. litzdog911

    litzdog911 Well-Known Member

    12,255
    77
    Jun 23, 2004
    Mill Creek, WA
    You can use an RF Modulator to convert the H24's Composite Video OUT and audio OUT (yellow, red, white RCA cables) to an RF signal on Ch3 or Ch4 that you can send via coax to a remote TV. They're available at places like Radio Shack, Best Buy, etc.

    Is that what you're trying to do?
     
  3. jdogi70

    jdogi70 Mentor

    49
    0
    Jun 3, 2008
    Los Angeles
    Thanks now heres the 64k question they have 3 channels they have their own feeds on will these mods work the same way? thanks again for the input
     
  4. jdspencer

    jdspencer Hall Of Fame

    6,646
    14
    Nov 7, 2003
    ChannelPlus makes several modulators.
    Inserting URLs isn't working for me, so do a Google search for "CahnnelPlus'.
     
  5. veryoldschool

    veryoldschool Lifetime Achiever Staff Member Super Moderator DBSTalk Club

    42,684
    349
    Dec 9, 2006
  6. bigglebowski

    bigglebowski Legend

    225
    2
    Jul 27, 2010
    The things to consider are the output power of the existing modulators so you can "balance" the one you add in. This would also mean modifying the way the existing mods are combined. Could be a simple 3way splitter where you would just replace it with a 4way.

    What kind of modulators do they have now? How long is the cabling? How many TVs?

    Could replace them all with the device VOS posted a link to but may need an amplifier on its output if there are many TVs or the cable runs are long enough. If the overall runs are short or there are not that many TVs then that mod would work fine on its own. This would be practical if all the existing equipment is in the same place.
     
  7. cabletech

    cabletech Legend

    264
    2
    Jan 20, 2011
    Bare in mind, that you can not select 2, 3, 4, 6, differant channels at the same time for viewing off of ANY sat reciever, SO,,,,with only a single reciever, you are only going to get a single channel.

    If you are looking at doing 2 or more channels at the same time, you will need 2 or more recievers and then this channel Plus will work or you can also get a commerical grade demod and out put combiner to do the same job.
     
  8. jdogi70

    jdogi70 Mentor

    49
    0
    Jun 3, 2008
    Los Angeles
    Wow cool thanks guys for all the input I guess the cabling is pretty long in length because the picture is pretty snowy. Basicly I don't .know what kind of demods they have. Prettyuch the guy on charge asked about it and I said I'd look into it.
     
  9. Floyd

    Floyd Legend

    146
    2
    Nov 9, 2004
  10. bigglebowski

    bigglebowski Legend

    225
    2
    Jul 27, 2010
    This is a very nice modulator that probably cost A LOT when it was new. Its got some features that may not be good for the OPs situation. The main thing that jumps out on that one is its got a HIGH output. That kind of output assumes you are going to eat up a lot of the gain through the various combiners at the headend. The level adjustment on commercial mods like this are usually only 10dB so running it at the lowest setting will put out over +50dBmV. Combining 4 modulators with a 4way splitter will drop that to +43dBmV. Unless we are talking about feeding 30+ tvs or the cable runs are many hundred feet you will have to pad the level down with something like these:

    http://www.ebay.com/itm/2-ASKA-CABL...219?pt=LH_DefaultDomain_0&hash=item1e667469fb

    Im only posting that as an example not saying that is the values you need. You would actually want a handful of these at various values which range from 3dB to 20dB and they can be daisy changed if necessary. This is also necessary to balance the level with the other channels which it sounds like the OP is saying already look weak. In the case of this mod you would probably end up with too strong of a signal which is always a worse picture than too weak.

    If I was doing the job I would use equipment like the ebay link, but in the case of this particular job and lack of OP having an RF meter it might be a good idea to use the one posted before that did 4 channels so all the sources go to the same device and all channels get output at the same level. Then if the signal was not strong enough for the number of TVs and/or there is a lot of cable loss you could get a general purpose amplifier to make up for the splitter and cable loss.

    If you could get me the actual layout and splitters and approx distances on the cabling we may be able to give you some better advice.
     
  11. AntAltMike

    AntAltMike Hall Of Fame

    3,790
    108
    Nov 20, 2004
    College...
    Does jdogi70 realize that these recommended modulators do not develop an HD signal? How much are the cheapest zee vee mods these days? Still close to $1,000?
     
  12. bigglebowski

    bigglebowski Legend

    225
    2
    Jul 27, 2010
    The zeevee model that does 1080i still costs +$1000.
     

Share This Page