tt0ne
join:2008-07-13
Redlands, CA
| reply to RR Lily
Re: [TWC] Upstream Power is +56.5 dBmV, please help.
Hi,
First off, your ethernet cables make no difference in the readings you see at the modem. I have a 100 ft cable from my modem to the linux router and it's Cat-5e - not even Cat-6. But it doesn't matter - the readings you see on your modem have to do with the signal levels from the RG-58 (I think it's RG-58 - but you know what I mean) to the cable companies equipment. It will fluctuate a few points in either direction depending on the weather, heat, etc. outside.
That being said: check out my thread and how I solved my problem:
»SNR readings & Motorola SB5100
The device I used was this:
»www.motorola.com/consumers/v/ind···b00aRCRD
But, I didn't connect the power cable to it because I wasn't having problems with too little power - but too much. Unfortunately, it didn't have much effect on my upstream power levels but totally corrected my massive downstream power level problem. Unfortunately, only your cable provider can give you your SNR readings for the upstream, but your power level is still within spec. I agree, though - it's too high even though it is within spec. If you don't want to try something like the equipment I posted above, go to Radio Shack and purchase a few splitters and keep splitting until you get some lower power levels (in regards to the RG-58 cabling - like I said above - your ethernet/usb/etc. have nothing to do with those readings).
If splitting doesn't help - you'll just have to keep opening up tickets.
If I'm completely off my rocker, I'm sure someone will correct me - but from my own thread - I was able to correct my problems without getting Time Warner involved.
Hope you get it solved, man!
- Marco |
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RR Lily
join:2009-07-02
Brownsville, TX
| Thanks for the reply, I read the post but now I feel a bit lost...
So you're recommending I add more splitters? I thought my weak signals was the reason they removed the one splitter from the room. If you don't mind telling me a bit more, I'd like to hear it. |
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etaadmin
join:2002-01-17
Dallas, TX
| Get one of these
»www.pctinternational.com/_produc···mps.html
MUST BE a bidirectional amplifier (active return). They come in 2-4-8 ports too eliminating the need for splitters.
There are other brands but beware the stuff you buy at radioshack is junk so make sure you buy professional grade bidirectional amplifiers.
Please note that the following link is for a passive return (no upstream amplification)
»cgi.ebay.com/PCT-cable-amp-ampli···1|294:50
I've seen new PCT 4 ports active return amplifiers at ebay listed for around $50.
My home in McAllen has the 8 port version with each output going to a different room. I have no splitters here. |
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RR Lily
join:2009-07-02
Brownsville, TX
1 edit | Downstream Status
Operational
Channel ID
7
Downstream Frequency
567000000 Hz
Modulation
256QAM
Bit Rate
42884296 bits/sec
Power Level
-2.8 dBmV
Signal to Noise Ratio
35.3 dBmV
Upstream Status
Operational
Channel ID
3
Upstream Frequency
34000000 Hz
Modulation
16QAM
Symbol Rate
2560 Ksym/sec
Power Level
54.3 dBmV
Are today's readings, when both technicians were out here this week I inquired about splitters (which they recommended we remove) filters (some had never heard of), and amplifiers. Which I got mixed responses. I was told the amplifiers would only affect my channel signals and NOT my internet. I really wish these technicians would have their infomation together. So overall with the information I've provided I need an amplifier? Will this replace that 3-way splitter in my garage? |
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daveinpoway
Premium
join:2006-07-03
Poway, CA
| In general, consumer-grade amplifiers are not a good idea for bi-directional (internet and digital set-top boxes) cable services. Worst-case, they can amplify noise on your line and send it out to your neighbors, thus ruining service for many people. If an amplifier is truly needed, it should be a professional-grade one that is supplied, installed and adjusted by your ISP.
Also, in many instances, bi-directional cable amplifiers will only amplify the downstream signal, and will thus not do anything to reduce the upstream power.
I know it has been frustrating for you, but, other than the suggestions about checking your cables and trying a replacement modem, the solution is going to have to come from a TW tech. Only they have the measuring equipment (which costs way too much for you to even think about buying for yourself) to see what is going on plus the experience needed to take the proper action once they make the measurements. |
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