Nsane_iceman
Workaholic
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join:2001-02-26
North Richland Hills, TX
clubs:
1 edit | [TWC] Normal amount of signal loss Mesquite, Texas
I had someone from TWC out today to check the lines.
The service was slow (122/56 from dfw.speakeasy.net) and I would loose block sync from time to time and have to power cycle, every day, to get sync back.
I opened the system info for the RCA modem and I was getting a -19.6 dBmV level. He said that it was too low, and wanted to switch out the modem.
The Motorola SB5101 that was now in it's place wasn't even able to get sync at the -19.6 dBmV level.
We went outside to the pedestal, signal level there was a +9 dBmV.
We went to the back yard where the drop/loop is and the signal level was -8 dBmV, he re-crimped the ends, and now there was a +3 dBmV signal level.
We went back inside the house and the modem had block sync, and the signal level is now -10.3 dBmV.
Now for the question, heh, is it normal to have the +9 dBmV to a -10.3 dBmV level over ~172 feet of cable (RG59 I think). There are not any splitters, but there are two barrels on the line.
I am just seeing if I need to rerun the line, due to poor cable.
Thank you,
Nsaneice
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MacLeech
The one and only
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join:2001-07-14
SoCal
| If the line is 59 with 2 barrels, it should've been replaced.
The signal loss depends on the particular frequency though, so any calculations are just pure speculation.
Using a common modem downstream channel frequency for my area (705 Mhz), your footage, and cable grade provided, I came up with the above chart.
See this link for more info:
»www.timesmicrowave.com/cgi-bin/calculate.pl
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Nsane_iceman
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join:2001-02-26
North Richland Hills, TX
clubs:
| It is running at 615 Mhz. I think it is RG-59, just common ole coax.
Sounds like I should run down the road and grab ~100 feet of new RG-59 to make the house run a solid strand without the barrels, if it keeps acting up or if my speed drops.
Thank you MacLeech for the post and the conversion chart.
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MacLeech
The one and only
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join:2001-07-14
SoCal
1 edit | 
RG-6 | 
RG-59 |
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Nsane_iceman
Workaholic
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join:2001-02-26
North Richland Hills, TX
clubs:
| I was checking the loss between the two on the calculator that you posted. I really depends on the price, if RG-6 just keeps a point or two of signal it may not be worth the price difference.
I always like to buy the best, like the divided CAT-6 I used to wire the house with, but yea, money money money.
We shal see...
Thank you,
Nsaneice
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Pure
Unacceptable Behaviour
join:2001-05-31
Dallas, TX
 ·RoadRunner Cable
| reply to Nsane_iceman
RG6 is best as MacLeech recommended.
Something has to be going on from outside of house to modem besides just the cable. Has got to be something with the barrels. I have done things as simple as replace a barrel and get better signals, but in this instance replace whole line for straight run.
If continue to have issues send me a PM, and I'll see if can help any further.
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