Cable Forum - Power Levels For Cable Broadband And Cable Tv

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chambohambo

23-10-2009 19:15

Power Levels For Cable Broadband And Cable Tv

What should the downstream power level be and the snr and what should the upstream power level be?

Axegrinder

23-10-2009 19:16

Re: Power Levels For Cable Broadband And Cable Tv

Are you ex-Telewest or ex-NTL?

chambohambo

23-10-2009 19:48

Re: Power Levels For Cable Broadband And Cable Tv

ex-Telewest

Axegrinder

23-10-2009 20:02

Re: Power Levels For Cable Broadband And Cable Tv

Downstream SNR, above 30 is preferred, 28ish being the lower limit (i think)

Downstream power should be as close to 0 as possible, with the limits being -6dbmv to +12dbmv

Upstream power should be no lower than around 32dbmv and no higher than 58dbmv. If you are on QAM16 the power level should not be higher than +55dbmv.

Quiet_news

23-10-2009 20:23

Re: Power Levels For Cable Broadband And Cable Tv

DS I wouldn't have it higher than +10 ... field runs with -10 - 10 across the board .. but it depends who you speak to ...

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