Thread: coxial cable extension Broadband
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Old 02-07-2009, 19:54   #2
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Re: coxial cable extension Broadband
Quote:
Originally Posted by sshan View Post
Hi guys,

i recently extended the coaxial calbe from the socket to cable modem (around 3 months ago), at the time i was on the 10MB service, however i upgraded to 20mb service couple of weeks ago and seem to notice some problem with the modem Downstream Frequency and upstream power levels.

Downstream Frequency: 315000000 Hz
Downstream Power Level: 2.8 dBmV
Signal to Noise Ratio: 37.9 dB

Upstream Frequency: 25808000 Hz
Upstream Power Level: 60.5 dBmV

seem to problem with both the down freq and upstream power level, i was under impression that down freq should be around 333000000HZ and powerlevel aunder the 60 dbmv.

i used high quality cables when i did the extension FT100 coax from maplin and also used Gold plated F connectors. the problem is wired coz i never had this problem when i was on the 10MB service only when upped to 20mb service this seem to be a problem?

my cable modem is : Scientific-Altanta WebStar Cable Modem

any help would be greatfull, thanks
im ex-ntl but downstream should be between 0 to minus 5 (have worked as far out as -12)
your upstream is right at the limit (highest being 61 then retrying) if your in a 50meg area then as a 20meg user you will be on the new 50meg ubr's which have 4 frequencies (again ex-ntl) im not sure if its the same all over the country though.
that said,ive been to faults where subs have cabled their own extensions for cable tv and broadband and theyve worked fine for weeks/months but the obvious fault was loss of signal from original termination point (by VM engineer) and subs own termination point after extending the cable.

if you call them out and thats the case you will be charged £30 for the service call,if tech cant do the re-cabling there and then its a further £99 to book an appointment for the install partners to return and cable correctly

how about moving everything back to its original point before you moved it and posting all the above info from the original point of install
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