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Discussion in 'DIRECTV Installation/MDU Discussion' started by Cavicchi, Jun 8, 2010.
Joe, i hope u have an opinion on this matter
The following is an excerpt from an article that can be read in its entirety via link below. There are other differences stated in the article as well.
"For RG-6 coaxial cable, the main issue for copper is whether the center conductor is solid copper or copper-clad steel. Since an installation of RG6 cable may later need to be moved or switched to another use that requires some power, it's definitely better to use a solid copper center conductor."
DirecTV did not have to tear any walls down to run their cable up to second floor in my house--first installation done a few years ago. I switched back to my cable company and recently went back to DTV. I think DTV originally ran cable from outside to basement then out to side of house and into second floor. There is DTV RG 6 in the wall upstairs and now connected to H24; the H24 was previously connected to RG 59U.
I used to use 59 in stacked systems all the time with no issues whatsoever. And they go up to 2150MHz.
SWiM goes up to 1450MHz. Why would there supposedly be a problem using 59 instead of 6 (other than you would not want to use it for D.C.)?
R.F. travels on the surface of the center conductor. If the cable is carrying r.f. only,(such as to the outlets in SWiM systems), it doesn't matter which type of cable is used (SC or CC). But, if there's D.C., SC should be used.
I realize that there are different types of RG6. My point was that it doesn't matter who installed it. FWIW, I am pretty sure that D* used copper clad steel on the four lines from my dish because solid copper was not the standard at the time of my HD upgrade in 2005. I am also pretty sure that my builder used copper clad steel RG6 when my house was built in 2002. My self installed SWM-8 works just fine with the existing wiring.
Expect to be severely disappointed
Even with the old SWM5 this is slightly short of the frequencies used.
With the SWiM currently being used 1800+ MHz is the upper limit.
Solid copper core was to have been used back then.
makes perfect sense at the time since this works fine for CATV.
If your runs aren't too long & you're using the 29 volt PI, this also makes sense.
Thanks for the correction. I had always understood that it used the conventional 950-1450. Guess I was wrong.
It's listed as 974-1790 MHz, but they also say the channels have 100 MHz bandwidth, so it isn't clear if these are start, center, or :shrug: frequencies.
If the bandwidth is 974-1790MHz, the first channel would have to begin at 974 and the last channel would end at 1790, which doesn't add up for 100MHz channels, unless they're adding buffers to either end.
Here is a spec sheet I just found for SWMs.
I don't know for sure whether the dish to SWM-8 lines are solid copper or copper clad steel. I do know for a fact that my friend's dish to SWM-8 lines are copper clad steel because I saw them when I helped him install his SWM-8. I think we were both installed by DirectSAT USA around the same time. Maybe they cut corners. Regardless, both of our systems work flawlessly.
I am using the 29 volt PI and my runs are all probably less that 50' each.
I'm not saying that my setup is ideal, just that it works fine. D* never said anything about replacing coax when they did my installs. I wasn't about to let them drill holes in my house and run cables to wherever they wanted had they said anything.
Here is what I was using:
http://forums.directv.com/pe/Reposi...96641/SWM - Integrated LNB-ModuleTraining.pdf
Combine the two. That suggests that the frequencies indicated for each channel is the high end of that channel's bandwidth. With a 10MHz buffer on either end of the total bandwidth, the guide data would be in the 16MHz channel from 960-974MHz. Looks like there is also a 2MHz buffer between each channel.
Well, isn't there DC in SWiM installation? Hello, veryoldschool, are you out there?
There is but "only" between the PI & the SWiM [and if the SWiM is separate from the dish, then the SWiM to LNB].
There is NONE from the receivers to the SWiM.
I know you said from dish to PI, but I'm lost when you say "if the SWiM is separate from the dish, then the SWiM to LNB."
How would the SWiM be separate from the dish , then SWiM to LNB?
I am pretty sure they changed one LNB on dish and ran one cable from dish to ground block, then to SWiM splitter, then out to receivers with one receiver having the PI connected to it. What scenario would entail the other situation you mentioned?
There are several SWiMs:
You seem to have the SWiMLNB.
There are a SWiM8 & SWiM-16 that have four coax from the dish to them [which carry voltage].
Should I call and demand a SWiM 8?
A supervisor came today and replaced the copper clad cables with DTV cables, and he saw an issue with power inserter not being hooked up right and fixed that as well. Plus, the cable going from power inserter to wall was going to a "clear" barrel connector and he said that was wrong and asked if I had a "blue one." I took one from a bedroom upstairs that has a cable connection but no TV connected, used to be my son's den. This "Blue one" is from my cable company. He put that in and connected TV to it and all was good--he said that would have caused issues and asked why the other supervisor didn't notice it.
I don't know why he didn't have any of those "Blue" barrel connectors and not even wall plates to fit the barrel connector.
In addition, he eliminated the extra barrel connector in basement. This supervisor serves a different area than mine, so he gave the other supervisor's cell number in case I have a problem--and he gave me his cell number as well, even though he doesn't cover my area. I don't know why he was here when he isn't supposed to cover my area, but I am glad it was him!
He told me he has the same setup with MRV at home and is using RG 59U.
Anyway, I want to personally thank you for all your help! I truly appreciate all the knowledge you brought me along with your advice. With your help, I am now, as of this moment, a very happy DirecTV customer.
Enjoy your services!