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Topic: Splitter (Multiplexer) affect download speed?  (Read 2987 times)
eclipxe
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« on: April 02, 2005, 02:47:23 PM »
Hey guys - I have adelphia premier and I seem to be capped at 3.6-3.8 download (after upgrade and before).

I have a splitter on my cable line so that my satellite will also work - do you think this can cause the limiting? Adelphia tech support had no clue why my speeds were low and weren't too interested in trying to help either.

Thanks guys...
-Chris
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cak46
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« Reply #1 on: April 02, 2005, 05:28:46 PM »
Each splitter will lower your signal strength by about 3 Db.  You might want to check your line levels as this may affect your speeds.
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eclipxe
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« Reply #2 on: April 02, 2005, 07:10:30 PM »
Thanks for the reply - how would I go about testing my line levels?

-Chris
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dn0
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« Reply #3 on: April 02, 2005, 07:23:11 PM »
What brand and model of cable modem do you have?
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Download Connection is:: 13858 Kbps about 13.86 Mbps (tested with 12160 kB) Download Speed is:: 1692 kB/s
Upload Connection is:: 1052 Kbps about 1.1 Mbps (tested with 2992 kB) Upload Speed is:: 128 kB/s
D-Validation Link:: http://testmy.net/stats/id-3H8V14MSA
U-Validation Link:: http://testmy.net/stats/id-FT5ZNJCXB
 
cak46
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« Reply #4 on: April 02, 2005, 07:25:15 PM »
If you are running a motorola SurfBoard  type in the ip address : 192.168.100.1 and click on the signal tab.

For information on good signal levels, follow this link:  http://www.speedguide.net/read_articles.php?id=1197&print=friendly

 
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eclipxe
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« Reply #5 on: April 02, 2005, 07:57:48 PM »
Removed splitter - same deal.

Stuck at 3.6-3.8...Oh well (at least now I can continue to enjoy TV in my office)

Maybe I need a new modem? I have a Surfboard MB4200 - are these outdated?

-Chris
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dn0
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« Reply #6 on: April 02, 2005, 08:26:17 PM »
Nope, that is what I am running (SB4200), and I average about 4300-4700 with Cox 4000 / 512.

::::::::::.. Download Stats ..::::::::::
Connection is:: 4469 Kbps about 4.5 Mbps (tested with 5983 kB)
Download Speed is:: 546 kB/s
Tested From:: http://www.testmy.net/
Test Time:: Sat Apr 02 2005 21:25:24 GMT-0600 (Central Standard Time)
Bottom Line:: 80X faster than 56K 1MB download in 1.88 sec
Diagnosis: Awesome! 20% + : 46.86 % faster than the average for host (Cox.net)
Validation Link:: http://testmy.net/stats/id-7OAWSBJZ2


Logged

Download Connection is:: 13858 Kbps about 13.86 Mbps (tested with 12160 kB) Download Speed is:: 1692 kB/s
Upload Connection is:: 1052 Kbps about 1.1 Mbps (tested with 2992 kB) Upload Speed is:: 128 kB/s
D-Validation Link:: http://testmy.net/stats/id-3H8V14MSA
U-Validation Link:: http://testmy.net/stats/id-FT5ZNJCXB
 
dn0
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« Reply #7 on: April 02, 2005, 08:29:28 PM »
Quote from: cak46 on April 02, 2005, 07:25:15 PM
If you are running a motorola SurfBoard type in the ip address : 192.168.100.1 and click on the signal tab.

For information on good signal levels, follow this link: http://www.speedguide.net/read_articles.php?id=1197&print=friendly

 

Did you try what cak46 suggested?
Are your levels good?
Logged

Download Connection is:: 13858 Kbps about 13.86 Mbps (tested with 12160 kB) Download Speed is:: 1692 kB/s
Upload Connection is:: 1052 Kbps about 1.1 Mbps (tested with 2992 kB) Upload Speed is:: 128 kB/s
D-Validation Link:: http://testmy.net/stats/id-3H8V14MSA
U-Validation Link:: http://testmy.net/stats/id-FT5ZNJCXB
 
lazy8
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« Reply #8 on: April 02, 2005, 09:41:12 PM »
I've got an Ambit cable modem is there anyway for me to check these readings?    I put in the IP address an I get the modems page but it dosen't tell me anything an I am unable to login in to it.
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eclipxe
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« Reply #9 on: April 03, 2005, 02:50:56 AM »
My results seem to be in-spec:

Downstream SNR = 37dB
Downstream PowerLevel = 15dBmV

Upstream SNR = (not shown)
Upstream Power Leve = 44dBmV

My upstream is fine -- download still crappy Sad

Any suggestions? I appreciate it guys!
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cak46
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« Reply #10 on: April 03, 2005, 06:46:05 AM »
Quote from: lazy8 on April 02, 2005, 09:41:12 PM
I've got an Ambit cable modem is there anyway for me to check these readings? I put in the IP address an I get the modems page but it dosen't tell me anything an I am unable to login in to it.

See below and try this: (Found on another forum)

My Ambit cable modem (brand name not obvious from the unit itself; IDable only via ethernet OUI 00:02:8a) has a web-based interface well-hidden. It's at address http://192.168.100.1/, but is only accessible from http://192.168.100.20/. The login is 'root', password is 'root'.
*******************
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cak46
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« Reply #11 on: April 03, 2005, 07:00:22 AM »
Quote from: eclipxe on April 03, 2005, 02:50:56 AM
My results seem to be in-spec:

Downstream SNR = 37dB
Downstream PowerLevel = 15dBmV

Upstream SNR = (not shown)
Upstream Power Leve = 44dBmV

My upstream is fine -- download still crappy Sad

Any suggestions? I appreciate it guys!

Your downstream power is pushing the envelope and could be affecting your speed.  If you have one, you could try adding another splitter to see if the downstream power level will go down a bit.  Benchmark is -8 to 8 db for good downstream power level.
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dn0
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« Reply #12 on: April 03, 2005, 08:31:58 AM »
cak46 is correct.
+15dBmv is pretty hot.
Definitely put the splitter back in line.
Is it a 2-way splitter? Or is it a larger one (which would help even more)
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Download Connection is:: 13858 Kbps about 13.86 Mbps (tested with 12160 kB) Download Speed is:: 1692 kB/s
Upload Connection is:: 1052 Kbps about 1.1 Mbps (tested with 2992 kB) Upload Speed is:: 128 kB/s
D-Validation Link:: http://testmy.net/stats/id-3H8V14MSA
U-Validation Link:: http://testmy.net/stats/id-FT5ZNJCXB
 
lazy8
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« Reply #13 on: April 03, 2005, 09:25:39 PM »
Quote
My Ambit cable modem (brand name not obvious from the unit itself; IDable only via ethernet OUI 00:02:8a) has a web-based interface well-hidden. It's at address http://192.168.100.1/, but is only accessible from http://192.168.100.20/. The login is 'root', password is 'root'.

Thank you Smile
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