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  • #1

    SWM-LNB Diplexed with OTA

    I have one of the new 3LNB with SWM (SL3-SWM) already installed which provides 1 cable to the house. I also have an OTA line run to the house as well. All my cables terminate inside a media cabinet.

    My question is this. Currently my PI is in one of the rooms. I would like to move this into the media cabinet. Would all I have to do is connect the Sattelite input to the PI, IRD to 1x4 splitter, and then connect the cables to each room? If I do it this way, do I still need to use the STS splitter for the single power pass?

    The other question I have is can I diplex the OTA cable with the cable coming from the IRD connector on the PI which goes to the 1x4 splitter? This way I don't have to use 2 - 1x4 splitters and diplex on 4 cables?

    Any help with this will be appreciated. Thanks.
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  • #2
    Yes, you can move the PI. The power passing leg is meaningless if the PI is before the splitter.

    You can diplex OTA into the line before the splitter, but you MUST use a SWM-approved diplexer before and after (to combine and split) the OTA.

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    • #3
      Thank you for your reply. I had a feeling that the power passing leg was meaningless if the PI was before the splitter. I just wanted to make sure I didn't screw anything up. I think I will try this tomorrow. Of course, now that I asked you if this was possible, I found somebody else who has the setup I want to create and this is his diagram in case anybody comes across this and needs a visual aid. I guess the only problem with the image is that he doesn't show that he diplexed the cables in each room:



      He is also using the same Diplexers I have... Perfect Vision PVDP3 diplexers. I assume those are approved for SWM setups since it worked in his case.

      Thanks again for your assistance.

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      • #4
        First, you don't have a diplexer shown at the other end of your diagram. You'll need one in each room.

        Second, the PVDP3 is NOT SWM APPROVED and while it may have worked for this person at the outset, it could cause problems. SWM systems require diplexers that go down to 2mhz, which is the frequency at which receivers communicate with each other. Most non-SWM diplexers, such as this one, go down the 5mhz only. Just take a look at the PVDP3 specs.

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        • #5
          Actually, you CAN'T diplex these because SWM utilizes the bandwidth that the diplexer would normally use

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          • #6
            For further clarification, I do have a diplexer in each room, I just wanted to point out in the diagram that somebody else created, it didn't show that. I also looked at the Diplexers I was using and it showed 2-2300Mhz. I am having no issues getting OTA with the setup I used. Thank you all for your help.

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            • #7
              Originally posted by 67cruiser View Post
              Actually, you CAN'T diplex these because SWM utilizes the bandwidth that the diplexer would normally use
              67cruiser: We very much appreciate your taking the time to post in these forums and to help people here. However, in this situation you are spreading incorrect information, no doubt inadvertently.

              It is very clear in all DIRECTV documentation that the SWM does NOT use bandwidth taken up by off-air, and that is one of the many benefits of using a SWM.

              I'd ask you to point out where you are reading about the incompatibility of SWM/OTA, so I can understand how you could have been under this misimpression.

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