From: Richard Scobie <r.scobie@clear.net.nz>
To: Devin Heitmueller <devin.heitmueller@gmail.com>
Cc: linux-dvb <linux-dvb@linuxtv.org>
Subject: Re: [linux-dvb] [RFC] SNR units in tuners
Date: Sun, 19 Oct 2008 07:56:11 +1300 [thread overview]
Message-ID: <48FA314B.5040203@clear.net.nz> (raw)
In-Reply-To: <412bdbff0810171306n5f8768a2g48255db266d16aa8@mail.gmail.com>
Devin Heitmueller wrote:
> At this point the goal is to understand what the value means for
> different demods. For the simple cases where the answer is "it's the
> SNR in 0.1db as provided by register X", then it's easy. If it's "I
> don't really know and I just guessed based on empirical testing, then
> that is useful information too.
According to the datasheet, the carrier to noise ratio for the BSRU6
front end, (which contains an stv0299), can be calculated in dB using
the following information:
Register ADD 24 NIRH 8 bits (MSB of noise indicator)
Register ADD 25 NIRL 8 bits (LSB of noise indicator)
C/N (dB) = -0.0017 * NIR + 19.02
Regards,
Richard
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next prev parent reply other threads:[~2008-10-18 18:57 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-17 18:04 [linux-dvb] [RFC] SNR units in tuners Devin Heitmueller
2008-10-17 18:13 ` Steven Toth
2008-10-17 19:55 ` Darron Broad
2008-10-17 20:06 ` Devin Heitmueller
2008-10-18 5:42 ` Darron Broad
2008-10-19 19:54 ` Georg Acher
2008-10-19 20:43 ` Darron Broad
2008-10-19 21:52 ` Georg Acher
2008-10-19 23:40 ` Darron Broad
2008-10-20 0:01 ` Darron Broad
2008-10-18 18:56 ` Richard Scobie [this message]
2008-10-17 22:01 ` Patrick Boettcher
2008-10-18 18:36 ` Trent Piepho
2008-10-18 19:38 ` Matthias Schwarzott
2008-10-19 11:46 ` Andreas Oberritter
2008-10-25 14:59 ` wk
2008-10-27 10:37 ` Morgan Tørvolt
2008-10-27 14:03 ` Georg Acher
2008-10-27 15:54 ` Andy Walls
2008-10-27 16:16 ` Morgan Tørvolt
2008-10-27 16:25 ` Georg Acher
2008-10-27 16:40 ` Manu Abraham
2009-08-07 7:04 ` VDR User
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