Quote:
Originally Posted by whydoIneedatech
We now both use the Ambit 256 modem on all networks.
Telewest SNR is supposed to be between 29db and 50dB.
NTL can go below 26dB and sometimes can get lower and still work.
Three different platforms within what is now one company.
Knowsley, Langley and Bromley all have differences, such as SNR and also the Downstreams differ between all 3 platforms.
|
Same modems all using same modulation (QAM or QPSK) means from your figures above that the noise must be higher on the Telewest network. The same signal levels are required for the modems across all networks, but the lower SNR requirements of the ntl side must mean that noise is lower on those networks.