Signal strenght SNR and BER units
Hi,
Whith dvbsnoop or femon, we can view the values of signal strenght (16 bits), SNR (16bits) and BER(32 bits). But what are the the scale and the units of this values. I Googling everywhere and can not find the meaning of its values. Are they're in DB ? I have just find, that the BER for the TT3200 are in 10E-7 scale, but that depends on card and drivers.
Can You enlighten me ?
I want to convert the hexadecimals values or the decimal form in human readable and explicit values.
Best regards
Franck
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It is different for each demod, depending on who wrote the code. I can list a bunch of drivers that report SNR in dB, but you cannot rely on this because the drivers are not consistent between one another. That is why your searches didn't turn up any answers. This is the first email that i'm sending from my new cell phone - please excuse if the
quoting format got mangled... -MiKE
Quoted 15 lines · Franck Bvl
Hi,
Whith dvbsnoop or femon, we can view the values of signal strenght (16 bits), SNR (16bits) and BER(32 bits). But what are the the scale and the units of this values. I Googling everywhere and can not find the meaning of its values. Are they're in DB ? I have just find, that the BER for the TT3200 are in 10E-7 scale, but that depends on card and drivers.
Can You enlighten me ?
I want to convert the hexadecimals values or the decimal form in human readable and explicit values.
Best regards
Quoted 8 lines
Franck
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[email protected]
http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
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Le 27.08.2008 20:18:18, [email protected] a écrit :
Quoted 10 lines
It is different for each demod, depending on who wrote the code. I can
list a bunch of drivers that report SNR in dB, but you cannot rely on this because the drivers are not consistent between one another. That
is why your searches didn't turn up any answers. This is the first email that i'm sending from my new cell phone - please excuse if the
quoting format got mangled... -MiKE
Hmm could a format be chosen so that it is actually useable? Bye
Manu
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Quoted 11 lines · manu
Quoted 9 lines · Le 27.08.2008 20:18:18, [email protected] a écrit :
It is different for each demod, depending on who wrote the code. I can
list a bunch of drivers that report SNR in dB, but you cannot rely on this because the drivers are not consistent between one another. That
is why your searches didn't turn up any answers.
-MiKE
Quoted 1 line
Hmm could a format be chosen so that it is actually useable?
As I said, I can point out some drivers that are known to report SNR in dB, but I can't tell you the units used in the other drivers.
It would be nice if it was standardized across all of the drivers, but specs aren't freely available for every device out there.
Any SNR code that I have written, or will write in the future, will be reported in dB.
-MiKE
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