Re: Blog: Getting your Ceton InfiniTV 4 this week? Some hints to
Someone over at tgb asked what good signal levels were for the Ceton InfiniTV4.
According to the OpenCable specifications the tuner must be able to tune in the -15 to +15 dBmV rms (75 ohms) range. Ideally you’ll want your signal level between -12 to +12 dBmV, the closer to 0 the better.
I consider the Signal to Noise Ratio (SNR) to be the more important of the two measurements. SNR ratio is basically the power ratio between a signal’s meaningful information and the unwanted background noise. If you have a great SNR it can make up for a weak signal level in many cases. For SNR it should always be above 30db but the higher the better, a good SNR is around 34db and great around 37db.
If you are a cable modem user and you don’t have your InfiniTV4 yet a good way to get a rough estimate of your signal levels is your cable modem diagnostics webpage. Most cable modem provide their diagnostic webpage via [url=http://192.168.100.1/]http://192.168.100.1/[/url].
It is only a rough estimate though as the relevant signal frequencies are different and each device measures the information at a different level of accuracy. But if you are waiting for your InfiniTV4 then something to check ahead of time.
On my particular setup my cable modem reads a signal level of 4 dBmV and SNR of 38 dB. The The Ceton InfiniTV 4 reads a signal level of -3 dBmV and SNR of 36 dB.