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DIRECTV's latest multiswitch is the SWM-30. It is, in fact, DIRECTV's only multiswitch. But, until they were discontinued years ago, DIRECTV had a SWM-8 and a SWM-16. The number indicates how many tuners each multiswitch could accommodate. (Note that I said tuners, not receivers. Read this article to understand the difference.) When used with DIRECTV's latest commercial receiver, the H26K, the SWM-30 can accommodate 30 tuners. With older devices, due to their construction, it can accommodate 26.

Because the last SWM-8 and SWM-16 multiswitches were made in the early 2010s, many of them have seen better days. Swapping one out for a SWM-30 is a smart and easy change. Really you just unscrew the cables from one and connect them to the corresponding ports in the other. However, there's something slightly different about a SWM-30.

No internal crossover

The SWM-8, SWM-16, and SWM-30 all have two outputs, labeled SWM1 and SWM2. However, the way those outputs work are very different between the three. Here's what you need to know.

SWM-8

The SWM-8 can accommodate 8 tuners. They can be placed anywhere on SWM1 or SWM2. It doesn't matter if you have all 8 on SWM1 or split them up 4 and 4, 3 and 5, or whatever. It's pretty flexible, but then you can only have 8 tuners total. All the devices connected to either port can see all the other devices and share programs from them.

SWM-16

The SWM-16 can accommodate 16 tuners. You can place up to 8 on SWM1, and up to 8 on SWM2. You can't, for example, put 10 on SWM1 and 6 on SWM2. It doesn't work like that. However, all the devices connected to either port can see all the other devices and share programs from them, no matter which port they're connected to.

SWM-30

The SWM-30 can accommodate 30 tuners when used with H26K, or 26 tuners when used with older devices. With H26K, you can put 15 tuners on SWM1 and 15 on SWM2. With older equipment you can put 13 on SWM1 and 13 on SWM2. However, the devices on SWM1 can't see those on SWM2, and vice versa. That's very different from the other SWMs where it didn't matter where you put things.

Here's where you run into a problem.

Let's say you're using a SWM-30 to replace a SWM-16 with 16 tuners attached. You would have to split those 26 tuners between two outputs of the SWM-30. That means some devices would lose the ability to share programs.

However, there's a workaround. The only thing is you have to know when to use it.

The NAS STD-9501 Diplexer

What yo see above is the STD-9501 diplexer from NAS. Unlike a regular splitter or combiner, it's got a special purpose. It will let you put DIRECTV's coax networking on the same line as the satellite TV signal. It's used in commercial installations. However with a bit of wiring expertise, you can also use it to bridge the two outputs of a SWM-30. Here's a diagram showing how it would all work:

Diplexing-9501


Click here to view full-screen or download.

As you can see, the diplexers are used to inject network information into the satellite line. The use of a green-labeled 2-port splitter lets everything see everything else.

The only thing is, you have to know when to use it

There are some limitations you need to be aware of, and they're the reason the SWM-30 doesn't normally allow the two outputs to see each other.

• You can only have 16 devices total within one network "cloud." If you try to have 17 devices all connected together, one of them won't see the other 16. The one that won't see the others is random, and it could change. It's also important to know that the DECA (the adapter that connects to your router) counts as one of those 16. So it's really 15.
• DIRECTV DVRs can really only see 8-10 devices. This is a long-term limitation of the system, and while it could probably be fixed, it's not likely to be since very few people are affected. If you try to have more than 7 devices together sharing content, chances are one will randomly drop off, or be invisible to the rest.
• A solution like this introduces some loss in the satellite output. You'll lose about 2dB of TV signal by doing it this way. That's usually not a problem, but if you have extremely long lines, you may need every decibel.

For these reasons, I don't recommend using this technique unless you're really sure you need it. It's pretty rare that people have more than 13 tuners in their homes, but the people who do are probably used to doing some very interesting tricks to keep things going. And, if you have more than 16 tuners, you're already aware that some of them are probably unable to see some of the others. So it's really just those people who have between 13 and 16 tuners and that's not going to be very many.

Is there any hope of an "official" fix for this?

DIRECTV could adopt MoCA 2.0 in all of its devices, which would allow for 128 devices in the same "cloud." They could also create a new multiswitch that had an internal crossover for those MoCA 2.0 devices. Neither of these things are likely to happen. Why? The engineering costs would be far beyond the financial benefit from serving a relatively small group. And, as much as we would like to say it isn't… money is always a factor. The few people who have this issue are already served by the STD-9501 and that's good enough for all but a very small number.

In the meantime, if you're ready to build the DIRECTV system of your dreams, let us help! If it can be done, we'll help you do it! We have all the same parts and accessories found on DIRECTV trucks, at prices you won't get anywhere else. Plus, we have a team of technicians ready to help. Call us at 888-233-7563. If it's after hours, fill out the form below and we'll get right back to you!


The post Should you bridge the outputs of a SWM-30 so that you can share programs? appeared first on The Solid Signal Blog.

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