 | 6pad vs 10pad on my modem On my arris modem my signal with the 8 bonded is around 6 dbmv on the downstream. On the upstream the power is around 50 dbmv that is with a 10pad attenuator. When I have the 6pad on it is around 10.63 dbmv on the downstream 8 channels and 45.75 dbmv on the upstream. Also I get a lot more correcteds on the 10pad. What would be a better set up? |
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 jaaPremium join:2000-06-13 kudos:2 Reviews:
·Optimum Online
·Vonage
| I think both would work fine and doubt there would be any measurable difference in speed.
Which is "mo better"?? If you have multiple attenuators, have done testing, and know enough to look at the corrected, then whichever you like best - which is all that matters.
-- NOTHING justifies terrorism. We don't negotiate with terrorists. Those that support terrorists are terrorists. |
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 | The reason I ask is the 6 pad. Makes the downstream high since it is around +10. The 10 pad makes the upstream high at 50. What would be better high upstream or high downstream? |
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 jaaPremium join:2000-06-13 kudos:2 Reviews:
·Optimum Online
·Vonage
| There is no right answer - the theoretical result is the same with either. The best is whichever gives the best real-world results (if they differ) for you. -- NOTHING justifies terrorism. We don't negotiate with terrorists. Those that support terrorists are terrorists. |
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 | reply to joels First question would be do you have any issues with your service? Second question Do you actually notice any difference in the usability of your service when changing the pad?
If you are trying to stay within Cablevision's spec then when you are above 10 on the downstream you are out of "spec". The upstream is within spec with either pad. If you are not having any problems put the 10 on there causing your levels to be where they should be and leave it alone. If you are having problems call Cablevision and have a tech come fix it. |
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 gr1m86 join:2013-03-02 Monroe, NY | reply to joels I would keep the transmit level low so stick with the 6 pad. Come summer time when it heats up the signal will drop causing the transmit power or upstream to increase possibly to a failing level. You should call and have a tech come out because theres no reason you should have to pad down your signal strength. |
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 | said by gr1m86:I would keep the transmit level low so stick with the 6 pad. Come summer time when it heats up the signal will drop causing the transmit power or upstream to increase possibly to a failing level. You should call and have a tech come out because theres no reason you should have to pad down your signal strength. If the modem is the only device in the home or off the first split there is sometimes a need to pad down the signal strength. |
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 gr1m86 join:2013-03-02 Monroe, NY | so your telling me that +16 dbmv at the modem without a pad is an acceptable signal strentgh at the modem?
+16 dbmv at the tap isnt even an acceptable level
I bet theres an amplifier invovled and if there is then that opens up a whole different can of worms. |
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 | It is around +15 to +17 at the tap for the different.frequencies. I have the reading from the tech. I was told they are increasing the signal at the taps so theu dont have to run two coax lines to peoples houses. |
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 | reply to gr1m86 said by gr1m86:so your telling me that +16 dbmv at the modem without a pad is an acceptable signal strentgh at the modem?
+16 dbmv at the tap isnt even an acceptable level
I bet theres an amplifier invovled and if there is then that opens up a whole different can of worms. +16 on mid and high end of the spectrum is acceptable at the tap. Heck in some cases in very rural areas you would have +30 at the tap going down a 500 foot RG11 cable run. Ultimately its what the level is at the customer prem device that matters to end user. |
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 gr1m86 join:2013-03-02 Monroe, NY | +30 dB off the tap port (not an amp or LE) equals a major electrical issue. With signal like that the electric would pulse through the spectrum and the frequencies would beat on each other causing a ton of issues.
If its over 200 ft the drop should be a RG11 at 500 ft then the Construction department runs hardline to the house if its possible.
Cablevision already cranked up the signal leaving the headend in areas that the plant was expanding by a whopping 3 dB last year. What the technician may have been talking about are node splits to reduce the amount of contention or traffic in your neighborhood. Signal is always changing with the weather and plant maintenance its safe to say it could sway about 5 dB.
Ultimately Cablevision's specs are +10 dB to -10dB and the upstream should not be higher than 54 dBmv BUT any field service tech would tell you that at +10 with a 54 transmit your service would be very intermiten and at -10 with a 36 transmit your service would also be very intermiten. Ideally you want to be at +2 dB and a 38 dB transmit (at the modem) without the use of a house amplifier then it would be safe to assume that if you did have an issue it would be equipment related not signal related.
If there is a house amplifier involved then the levels across the spectrum need to be flat otherwise the frequencies will beat on each other or the tilt will be way out of whack. A plant technician would have to adjust the signal at that point.
in no cases should there be an RF attenuator unless its used as a patch to get your phone up and working to call the cable company and have a trouble call setup.
check out:
»www.net-comber.com/cable-loss.html |
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 | said by gr1m86:+30 dB off the tap port (not an amp or LE) equals a major electrical issue. With signal like that the electric would pulse through the spectrum and the frequencies would beat on each other causing a ton of issues.
If its over 200 ft the drop should be a RG11 at 500 ft then the Construction department runs hardline to the house if its possible.
Cablevision already cranked up the signal leaving the headend in areas that the plant was expanding by a whopping 3 dB last year. What the technician may have been talking about are node splits to reduce the amount of contention or traffic in your neighborhood. Signal is always changing with the weather and plant maintenance its safe to say it could sway about 5 dB.
Ultimately Cablevision's specs are +10 dB to -10dB and the upstream should not be higher than 54 dBmv BUT any field service tech would tell you that at +10 with a 54 transmit your service would be very intermiten and at -10 with a 36 transmit your service would also be very intermiten. Ideally you want to be at +2 dB and a 38 dB transmit (at the modem) without the use of a house amplifier then it would be safe to assume that if you did have an issue it would be equipment related not signal related.
If there is a house amplifier involved then the levels across the spectrum need to be flat otherwise the frequencies will beat on each other or the tilt will be way out of whack. A plant technician would have to adjust the signal at that point.
in no cases should there be an RF attenuator unless its used as a patch to get your phone up and working to call the cable company and have a trouble call setup.
check out:
»www.net-comber.com/cable-loss.html
People read statements like the one above and then have unreasonable expectations.
+30 is too high from the tap.
anything over 500 feet should be hardline but it's not that easy to get it run.
high signal is just as bad as low signal but you could have -10 and 36 and never have an issue. I would be more worried about a +10 than a -10 on a digital signal. I would also be very hesitant to think a 54 transmit would be "rock solid" no matter how "perfect" the receive power.
There is no way to say +2 and 38 is ideal. There are too many variables and a +2 and 38 may be terrible in some situations. Additionally if signal levels are absolutely perfect and you still have an issue it does not mean it is equipment related. You can have perfect signal strength and still have a problem with signal quality and your equipment is probably fine.
Sometimes attenuators are needed. The same exact attenuators are used in headends and other types of attenuators are used to balance amplifiers in the field. Sometimes an attenuator might be used improperly but if it is used it doesn't mean there is something wrong. |
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 | If it's not broken, don't fix it! You will not see any changes on speed or something else either you install a 6 or 10 dB attenuator. You just lose your time. For sure, you can install 100' of RG-59 cable that will make your downstream level go down without increasing your upstream level, but you will still lose your time.
If you lose your Internet connection, it's another story, call your service provider and they will send a technician, maybe there's a distribution amplifier with a too high level output, but if you don't have real issue, you maybe just located near a distribution amplifier, in this case, that will result in high downstream and upstream level, similar to the situation you describe, it's not really an issue... |
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 | reply to sometimes
My signals. Note the -10. |
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