diff options
| author | Joerg Riechardt <J.Riechardt@gmx.de> | 2015-08-29 12:02:57 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2016-11-23 12:41:49 -0200 |
| commit | 386701892b4821c4d127710fa35b1309c4355bbf (patch) | |
| tree | 4d15f859b09e608b59242d4e49ce929b6722f159 /drivers/media/tuners/mxl5007t.h | |
| parent | 8ccd22db927995313a9ab3526c1765c7c157f3e9 (diff) | |
[media] stv090x: use lookup tables for carrier/noise ratio
The stv090x driver uses the lookup table for signal strength already,
with this patch we use the lookup tables for carrier/noise ratio as well.
This has the advantage, that values for DVB-S and DVB-S2 are now
corresponding, while before they were way off. The values are now
proportional to real carrier/noise ratio, while before they were
corresponding to register values. So now applications are able to give
the user real carrier/noise ratio.
Because the output has to be within 0x0000...0xFFFF the three negative
values for DVB-S2 are omitted. This is no significant loss, because
reception is lost at 7.5 dB already (TT S2-1600, Cine S2), so the
negative values are not really important, and also for DVB-S they don´t
exist.
Signed-off-by: Joerg Riechardt <j.riechardt@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'drivers/media/tuners/mxl5007t.h')
0 files changed, 0 insertions, 0 deletions