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Guest Message by DevFuse

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Dual SWM16 Setup Question


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7 replies to this topic

#1 OFFLINE   dminches

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Posted 26 January 2013 - 12:14 PM

I added a 2nd SWM16 switch using splitters that I bought at Solid Signal. Everything is working well. My satellite signals are still strong in the 90s.

I know that any time you split the signal from the dish you lose signal strength. How should I assess if this is an issue for me? I guess it will be worse when it rains or is cloudy. Are others using a power booster with this configuration?

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#2 OFFLINE   Scott Kocourek

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Posted 26 January 2013 - 12:30 PM

I am not using any booster but have only been with this setup for a few weeks. If you are in the 90's you will probably be fine.

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#3 OFFLINE   dennisj00

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Posted 26 January 2013 - 12:48 PM

I've had this setup for a month or so and haven't noticed any increase in rain fade.

VOS can probably give us the db numbers.

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#4 OFFLINE   Stuart Sweet

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Posted 26 January 2013 - 02:17 PM

IIRC you lose about 3dB on the input side.
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#5 OFFLINE   dminches

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Posted 26 January 2013 - 02:22 PM

Is that significant? I have no idea what the base signal strength is and if the readings one gets (95, etc) is in dBs.

DirecTV subscriber since 1994
HR24-500 (2 TB eSata) -> Runco LS-5 vis HDMI
HR20-100s (2 TB eSata) -> Runco LS-5 vis HDMI
HR24-100 (1.5 TB eSata) -> Sony 50E2000 via HDMI
HR20-700 - owned (2 TB internal) -> Samsung LN32A550 via HDMI
HR20-100s - owned -> Sony Bravia 40"
HR20-100 - owned (2 TB internal)

#6 OFFLINE   veryoldschool

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Posted 26 January 2013 - 02:22 PM

After doing some testing last summer, it turns out things aren't as cut & dry or simple as previously thought.

The LNB is the main limiting factor for rainfade. At about -40 dBm [varies a bit with each LNB] it loses lock on the signal. Once this happens you're SOL.

This means we're really dealing with the range just before this.

The SWiM will amplify -45 dBm to -30 dBm, and after -45 dBm, the output will start dropping.
The receivers work down to about -62 dBm.

"What does all of this mean?"

The [increased] loss before the SWiM seems to only affect the maximum loss to the receiver after the SWiM.

If the dish to SWiM(s) doesn't have much loss, and your runs to receivers don't have much loss, the 2-way splitters aren't going to be a problem.

If the dish to SWiM gets a bit lossy, then you might want to boost the signals to help, but this would mostly be for when you have long runs from the SWiM to the receivers.
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#7 OFFLINE   dminches

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Posted 26 January 2013 - 02:25 PM

Thanks VOS.

DirecTV subscriber since 1994
HR24-500 (2 TB eSata) -> Runco LS-5 vis HDMI
HR20-100s (2 TB eSata) -> Runco LS-5 vis HDMI
HR24-100 (1.5 TB eSata) -> Sony 50E2000 via HDMI
HR20-700 - owned (2 TB internal) -> Samsung LN32A550 via HDMI
HR20-100s - owned -> Sony Bravia 40"
HR20-100 - owned (2 TB internal)

#8 OFFLINE   veryoldschool

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Posted 26 January 2013 - 02:26 PM

Is that significant? I have no idea what the base signal strength is and if the readings one gets (95, etc) is in dBs.

3 dB is 50%, "but" we're dealing with ranges in the 1000%.
Your "95" has nothing to do with dB or dBm, as it has more to do with quality of the signal, than power level. What it will show is when your drop out of range, and the quality suffers.
A.K.A VOS




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