On Wed, Aug 24, 2011 at 9:25 AM, Nick Nobody <[email protected]> wrote: > Thanks Andy and Devin for your responses :) > > It seems both femon and I assumed the upper bound for the signal quality > and snr was 0xffff. That makes sense that femon would not accurately > report those values in the "human readable" format. > > Do either of you know off hand what the upper limit is for those values? > If not don't waste your time, I'll dig around for them.
For ATSC, the upper bound for SNR is 30.0 dB. The value is in hex on a 0.1dB scale, so 0x12c = 300 = 30.0 dB. For ClearQAM the upper bound is 40.0. > Devin: In the past I'm pretty sure I've seen the signal strength and snr > values differ (albeit not by much) but for the most part they're exactly > the same. There might be some slight variance because the two values are not retrieved in the kernel call. So basically you're seeing the same value sampled twice, so you might see slight deviation even though the two values are printed on the same line. Devin -- Devin J. Heitmueller - Kernel Labs http://www.kernellabs.com _______________________________________________ ivtv-users mailing list [email protected] http://ivtvdriver.org/mailman/listinfo/ivtv-users
