Johannes Stezenbach wrote: > Hi, > > Gill Robles-Thome wrote: > >>Can anyone explain the algorithm used to calculate the SNR for the >>stv0299 driver? Ie > > > Me, I don't understand it either. The data sheet just says: > "A simple C/N estimator can be easily implemented by comparing the > current indications with a primarily-recorded look-up table", but > doesn't give more information about this. > > You'll have to ask the original author of the driver, Peter Schildmann. For what it's worth, the data sheet for the BSRU6 tuner, which uses the stv0299 says the following: C/N[dB] = -0.0017 * NIR +19.02 where NIR is made up of NIRH - (register 24) MSB of noise indicator and NIRL - (register 25) LSB of noise register. Regards, Richard Sorry Johannes, for the dirct reply - it was meant for the list.
