|[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
On 12-04-28 02:36 PM, Brian J. Murrell wrote: > One more question... And to answer my own question, and provide some more data... > I've never gotten my mind around SNRs and dBs, etc. Generally speaking, > am I looking for these "snr" values to go up or down (i.e. closer to 0 > or further away) to make my signal better? Clearly, bigger numbers are better. When I hook my HVR-1600 directly up to the cable connection coming into the house with a 25 foot cable and a barrel connector the SNR goes up to "148" (32.8 dB) so that's my ceiling. I can't leave it hooked up like this for anything more than a few minutes so I can't be sure that's a high enough SNR for me to get perfect recordings every time. If I add one two way splitter to the incoming cable with one feed going off to my cable modem and one to the HVR-1600, the SNR drops to "145" (32.5 dB). But again, I can't really leave it like that for too long. so splitting that leg of the 2-way split 3 more times through a 3 way splitter reduces the SNR at the HVR-1600 to between "142" and "145" (32.2 - 32.5 dB). I typically have one more splitter downstream from that 3 way splitter which is a 4 way splitter to feed all of the tuners on my Mythtv box and introducing that splitter reduces the SNR at the HVR-1600 to between "13c" and "13e" (31.6 - 31.8 dB). I have no idea where in these range of values "acceptable" is though. Given that the HVR-1600 seems to be more sensitive to signal quality that just about anything else in here, I suppose I could feed it more directly from a split closer to the source signal. Cheers, b.
Description: OpenPGP digital signature