Digital CATV and Sat on the same cable?

Discussion in 'General CableTV & Satellite Forum' started by JonUrban, Feb 3, 2008.

  1. JonUrban

    JonUrban Thread Starter Supporting Founder Supporting Founder

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    Is there a device that will multiplex (or somehow) allow a user to put a digital satellite signal on the same coax as the feed from a satellite dish?

    For example, upstairs rooms with only one coax run to them would only be able to use one or the other but not both without such a box.

    Sounds like something that would be nice to have but probably does not exisit.
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  2. Andrewwski

    Andrewwski Active SatelliteGuys Member

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    Diplexers.
  3. iwc5893

    iwc5893 PIT MEMBER

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    Depending upon the sat provider and if he is getting HD or SD sat programming.
  4. vegassatellite

    vegassatellite SatelliteGuys Family Pub Member / Supporter

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    Well, yeah, DirecTV HD wouldn't generally accommodate this because of that baseband converter. However I have heard you can simply put that baseband converter closer to the dish prior to any diplexers.
  5. Andrewwski

    Andrewwski Active SatelliteGuys Member

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    Yes that generally works.
  6. JonUrban

    JonUrban Thread Starter Supporting Founder Supporting Founder

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    So, if I have HD Digital cable (D* and/or E* don't do my locals in HD) and DishHD I can run them into a Diplexor, then up to a second floor room with one coax? I would assume I'd need another Diplexor upstairs. Can anyone suggest a make/model number?

    Thanks for all of the responses! :D
  7. vegassatellite

    vegassatellite SatelliteGuys Family Pub Member / Supporter

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    Holland DPD2. Blue in color. The side that looks like a splitter's INPUT is the connection for the wire carrying both signals. That's true on both sides, so one will look normal at the receiver and the one outside will look like a backwards installed splitter.
  8. swampman

    swampman Active SatelliteGuys Member

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  9. AntAltMike

    AntAltMike SatelliteGuys Family

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    Is the background color of Holland labels supposed to mean anything? The first time I saw a blue label on a Holland Electronics passive device, it was on a Sub-band/VHF diplexer, probably back around 2001 or 2002, but I don't buy their products regularly enough to have observed what other products might have started bearing a blue label at that time.
  10. AntAltMike

    AntAltMike SatelliteGuys Family

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    I can't figure out what the original poster is trying to do. What exactly does he mean by, "put(ting) a digital satellite signal on the same coax as the feed from a satellite dish"?
  11. Andrewwski

    Andrewwski Active SatelliteGuys Member

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    He probably means "digital cable signal".
  12. vegassatellite

    vegassatellite SatelliteGuys Family Pub Member / Supporter

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  13. AntAltMike

    AntAltMike SatelliteGuys Family

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    Digital cable uses sub-band (below channel 2) frequencies for upstream communication. Comcast in Washington DC, for example, sends its upstream internet signals at 10.5 MHz, and their set top boxes also use sub band for upstream, though I don't know the actual frequency, so you can't use an old fashioned, 40-860 MHz diplexer for combining satellite with cable TV that you could use to combine it with off-air.

    But DirecTV's new SWM (single wire multiswitch) technology uses an upstream control signal frequency of 2.3 MHz, and there is some concern that diplexers that pass 5-860 MHz on their "antenna" port will impede the 2.3 MHz signal on the, "Sat plus DC/22MHz" port. NAS (National Antenna Systems) makes a diplexer that is approved by DirecTV for use with the SWM, but you might have trouble finding one available from a retailer.
  14. JonUrban

    JonUrban Thread Starter Supporting Founder Supporting Founder

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    Here's the situation. I currently have 2 Dish Network receivers and the local cable signal. I have the two E* boxes outputting to a Channel Plus Modulator that sends the first receiver out on Ch 81 and the second on Ch 83 which allows these two receivers to be available on any TV in the house. I have an analog cable coming in with a Channel Plus filter blocking analog cable channels above Ch 69 which allows the modulator to get Ch 81 and 83 out to the connected TVs. I also have 3 video cameras than monitor the extrerior of my house which are connected to another Channel Plus Modulator at Ch 89, 91, and 93.

    Of course, this was fine in the analog world, but now with HDTV I am at the point where I would like a sat receiver at each TV in the house to get the HDTV. However, there is only one coax running from the basement to each of the upstairs rooms that have TVs (3). I figure that I will dump the cable, but want to still be able to see the 3 cameras on 3 modulated channels as well as having the satellite signal coming to each receiver.
  15. vegassatellite

    vegassatellite SatelliteGuys Family Pub Member / Supporter

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    Dumping cable does make your situation a lot easier. Where are the CCTV modulators located?

    You can have satellite and your CCTV signals on the same wire. Let me know where everything is at and I can make some recommendations.
  16. dish_dtv

    dish_dtv Member

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    Related question: combine SC-output & E* output

    I have a related question. I have E* (PVR 508) and SC (DSR 505). Currently, my RF-TV out on E* has a DPD2 and that goes back to my DP34 switch on the outside. There is another DPD2 (this was set up this way originally for using it for my leased DVR 625, which I don't use any more) on one of the outputs of the DP34 that feeds the guest bedroom tv. With this set up, whatever I see on my living room tv from E* (using S-video) gets shown on my guest bedroom tv (using RF input) also. I know that it is the same channel but this allows me to watch SC on the living room tv using one of the DVI/HDMI inputs, and have my spouse use the guest bedroom tv at the same time watching E*.

    My question is this:
    My SC receiver's RF-output is set to channel 4. My E* RF-output is set to 3. Can I somehow combine the 2 RF outputs (from both SC and E*) and then send it via E*'s DP34 switch onto my guest room tv where I can see both E* (via channel 3) and SC (via channel 4)? I have 2 spare Holland HFS-2D splitters if it could be used for this at all. If I do this, then I could watch SC on either room as well in addition to being able to watch E* on 2 rooms

    I think it is feasible, but I don't know how to accomplish it......Hope I made sense with my problem/issue.
  17. vegassatellite

    vegassatellite SatelliteGuys Family Pub Member / Supporter

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    I take it that the DSR505 and the PVR508 are in the same room. If that assumption is correct, then all you need to do is use a splitter connected backwards to both receivers and then just hook the input to the line going to your diplexer. A splitter hooked up backwards functions as a combiner.

    Now, ideally, you would have greater separation between channels than just 3 and 4. If you find the picture quality suffers, then you can buy modulators which allow you to select any channel you like for sending to other TVs. If you go that route, I can instruct you on how to hook them up.
  18. dish_dtv

    dish_dtv Member

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    Vegas - Thank you

    Thanks for the splitter suggestion. I will try that first and let you know how it goes. BTW, will my splitter (Holland model HFS-2D 2 way-splitter, 5-2510 MHz) work in conjunction with my DPD-2 diplexer?
  19. vegassatellite

    vegassatellite SatelliteGuys Family Pub Member / Supporter

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    Yeah, just do the combining right out of the receiver so that you have both channels going in to the diplexer on one wire.
  20. JonUrban

    JonUrban Thread Starter Supporting Founder Supporting Founder

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    Thanks for your help.

    I have the 622 and 722 together with a Channel Plus 5445 in my Theater room. These run to a Channel Plus DA-550BID distribution unit in my basement, which is where the second 5445 sits that the 3 cameras come into.

    This panel sends the signals through the house on the pre-installed cable runs to each room.

    In the Theater, the HDMI from the 722 goes directly to my Denon 4806 receiver.

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