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SL3 SWM LNB Long Distance Setup Help
Posted 06 February 2011 - 04:05 PM
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Posted 06 February 2011 - 04:14 PM
See what happens when it rains. You're right at the limits now so you should be very susceptible to rainfade, and can see if the amp will help by checking the garage verses the house. If you're good in the garage, but not in the house, then I'd use the amp.
If everything is working fine, is there any benifit of hooking up the amp? I hate to see a $100 amp just sit there.
Posted 06 February 2011 - 05:16 PM
Posted 07 February 2011 - 08:13 AM
Should I put the AMP before the 160' run in the garage or after the 160' run in the house?
Posted 07 February 2011 - 10:32 AM
Posted 07 February 2011 - 10:43 AM
It's a tossup from even the amp maker, Sonora.
I would put it on the 2 way at the garage, that way you amp the signal at the source and not the noise at the house.
These systems are fairly noisy to start with, so there really isn't going to be a significant difference either location, after the 2-way or before the 4-way.
Posted 07 February 2011 - 10:47 AM
Owned H25-700 and H24-700 off and packed for the move.
DIRECTV subscriber since Nov. 2009
Posted 07 February 2011 - 11:04 AM
You know what the CNR is and you also know what the power levels are.
I guess you would amplify less noise closer to the dish?
Once you get past the first stage of amplification, everything kind of ends up being linear, and by this I mean: the noise from the dish is also going to be attenuated through the coax along with the signal. You've seen this on your meter, where the CNR is the same.
When there is no amplification [like an OTA antenna] all the loss before the first amp becomes noise, so this is why a low noise pre-amp is best mounted at the antenna.
If anyone wants to look into this more:
Edited by veryoldschool, 07 February 2011 - 11:33 AM.