[TelstraClear] TelstraClear cable modem signal levels help wanted

Forums › One NZ (including Farmside) › [TelstraClear] TelstraClear cable modem signal levels help wanted

alpha2

67 posts

Master Geek

#68969 30-Sep-2010 18:28

Hi all was just wanting a wee bit of help figuring out what signal/power levels are good for my telstra clear cable modem below is my signals fresh off the modem any help is greatly appreciated

Frequency
717000000 Hz

Signal To Noise Ratio
34.1 dB

Power Level
6.9 dBmV
The Downstream Power Level reading is a snapshot taken at the time this page was requested. Please Reload/Refresh this Page for a new reading

Upstream

Value

Channel ID
3

Frequency
32400000 Hz

Power
22.2 dBmV

Whats that ? you will own me lol last time i checked you were dead and i just got another kill

sbiddle

30853 posts

Uber Geek
+1 received by user: 9996

Retired Mod

Trusted

Biddle Corp

Lifetime subscriber

#386435 30-Sep-2010 18:50

Your signal is perfect.

alpha2

67 posts

Master Geek

#386448 30-Sep-2010 19:03

cool thanks sbiddle reason i ask is i had someone tell me my upstream power was too low

Whats that ? you will own me lol last time i checked you were dead and i just got another kill

sbiddle

30853 posts

Uber Geek
+1 received by user: 9996

Retired Mod

Trusted

Biddle Corp

Lifetime subscriber

#386458 30-Sep-2010 19:14

Ahh I was just looking at downstream, not upstream.

It's probably a little lower than it could be but unless you're expericing any issues there isn't really anything to worry about.

I assume you haven't reconfigured any of the wiring in your house?

alpha2

67 posts

Master Geek

#386471 30-Sep-2010 19:42

sbiddle: Ahh I was just looking at downstream, not upstream.

It's probably a little lower than it could be but unless you're expericing any issues there isn't really anything to worry about.

I assume you haven't reconfigured any of the wiring in your house?

no havent changed any wiring in the house at all . Sorry if its a dumb question but whats determining the upstream power ? and what is the optimal/recommended upstream power level and how to get it there ?

Whats that ? you will own me lol last time i checked you were dead and i just got another kill

ZollyMonsta

3009 posts

Uber Geek
+1 received by user: 379

ID Verified

Trusted

#386481 30-Sep-2010 20:18

You log a ticket with telstraclear and have them Check it and fix it (if it is even needed).

Check out my LPFM Radio Station at www.thecheese.co.nz - Now on iHeart Radio, TuneIn and Radio Garden

As per the usual std disclaimer.. "All thoughts typed here are my own."

alpha2

67 posts

Master Geek

#386484 30-Sep-2010 20:28

ok cool what sort of problems would you experience with a low upstream power level?

Whats that ? you will own me lol last time i checked you were dead and i just got another kill

HP

Shop now for HP laptops and other devices (affiliate link).

michaeln

238 posts

Master Geek
+1 received by user: 44

Trusted

#386729 1-Oct-2010 13:31

alpha2: ok cool what sort of problems would you experience with a low upstream power level?

Basically, don't worry. The only thing you might even ever care about is the S/N ratio, and as long as that is over 32dB you are sweet.

The cable modem constantly adjusts its receiver sensitivity and power levels to optimum levels. "Constantly", as in after pretty much every packet it gets.

The downstream power can vary widely around a nominal 0dBmV. If the power level is TOO HIGH then distortion can result. If it's too low then you get errors. The cable company can adjust the signal level by adding/removing attenuators on the cable.

Same in the reverse direction. If your upstream power is low, that means that there is tons of signal getting through and that the modem has been told to turn down the gain. Too high a power means the signal is having trouble being received and that the modem was told to up the gain to compensate. Again, your figures are nominal.

Having signal levels near the thresholds though doesn't mean anything. Cable speed doesn't drop off with distance, and it doesn't drop off with high or low power. As long as it is within the fairly wide margins, all is fine and there are no speed or reliability issues.

So, sorry, 'no user serviceable parts inside'. You can't tweak your home cable network to any good effect, but you might be able to destroy it entirely