Re: Cable Broadband Internet Signal loss from serial RG59 cabling - RF amp recommendations?
- From: comphelp@xxxxxxxxx (Todd H.)
- Date: 26 Jan 2008 12:13:41 -0600
drydem <walter_lee@xxxxxxxxxxx> writes:
I found out that one of the twist on RG59 F-connectors had
gotten loose - tightening them up improved the cable signal.
And now you know why twist ons are generally considered garbage. :-)
I also check the cable serial connections before the wall outlet
in the master bedroom to see if any cable signal loss
could be due to any poor connection from the source signal.
I checked and retighten the basement splitter and replaced
a less expensive dollar store 1Ghz splitter (Trisonic)
LOL. Splitter from the dollar store. Alrighty. :-)
which
was being used byn the Living room cable outlet box with a more
expensive home depot store 1 Ghz splitter (Ideal) . After that
I was able to get an internet signal in the master bedroom.
The Cable modem signal in the master bedroom was
significantly improved at:
Master Bedroom Cable Internet Signal (Improved)
Received -14.0 dBmV
Transmit +58.5 dBmV
At +58, you might get the modem to sync, but I bet packetloss is
horrid. I'm impressed the internet even worked there. Kudos to that
cable modem.
However, when I went to the next serial connection,
I was unable to get an internet cable signal.
No surprise based on the prior hop's numbers.
In the Office, the next serial connection, though. Stripping off the
wall outlet and attaching the cable modem directly with the Ideal 1
Ghz splitter the cable modem signal was:
Office cable modem signal
Received -21.8 dBmV
Transmit +09.3 dBmV
Guestroom cable modem signal
Received -17.8 dBmV
Transmit +08.3 dBmv
Neither the office nor the Guestroom (which are at the end
of this serial cable wire) can get an internet broad band
signal albeit the cable TV carrier signal is still strong.
Those transmit numbers appear to be bad data if the modem wasn't
syncing, by the way.
I've run out of time for this project and I will have to leave
any improvements/fixes/repairs to another date. I label
the wires for a future date and close every thing up.
However, experience has taught me that using the
pre-installed RG59 cable/antenna serial wiiring in older
home can be problematic. The connection I was able
to get using the crimping tools was not always
satisfactory and the twist on connectors were prone to
disconnecting. Knowing that - using compression
instead of crimp on/twist on f-connectors probably would
have yield better results.
Yup, it's why teh cable company uses em.
Cutting cable lengths inside the cable outlet box too short makes it
difficult to attach and fit the cable splitter inside the cable
outlet box - allowing for longer cable lengths inside the cable
outlet box makes installation easier to do. Cable modems rely on a
high quality carrier signal - which degrades with each splitter
/connection point. Using RG59 an unamplified internet cable signal
becomes unusable to a cable modem after it passes through four high
quality splitters. There definitely is a limit to how many times an
internet cable signal go through a splitter.
Absolutely.
Here in the Washington DC, you can't buy certain cable installation
items, e.g. cable terminators, and other cable installation parts
appear to be of substandard quality, e.g. bi directional RF
amplifiers. Getting professional quality installation accessories
and parts from the internet appear to solution.
Yup.
For those who answered my posting
I like to say thank you again for your advice
and input.
Walter
Sounds like you learned lot.
Now that you're out of time, can you indicate why you're so hesitant
to enlist your cable company's help with this in the form of a repair
call? Unless they have some sort of policy that says they're going
to charge you for inside wire work (which over 3 cable providers I've
not personally seen), what's to lose?
--
Todd H.
http://www.toddh.net/
.
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