[linux-dvb] Re: Signal strength or quality

[Johannes Stezenbach <js@convergence.de>]

Reiner Rosin wrote:
> 
> Is it possible to acquire the signal strength or the quality of the signal
> within vdr or directly from the driver?

The frontend device supports the FE_READ_SIGNAL_STRENGTH,
FE_READ_SNR and FE_READ_BER ioctls to determine the
signal strength, signal/noise ratio and bit error rate.

See http://www.linuxtv.org/developer/dvb_api/frontend.xml
for more info.

However, some scaling factors have not yet been determined
for the Siemens DVB cards, so the values returned by this
ioctls are somehow wrong...

Also note that SNR and BER are valid only when the frontend is locked.


Regards,
Johannes


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