OK, for those who do not grasp the principle of On-chip Demodulation, SILICON LABS is
manufacturing a spectrum of advanced Tuners, one of which may suit the mindset of those
who buck the idea of a Demodulator on chip. There is one that demodulates Analog TV alone,
one that demodulates Digital TV alone, and one that does both. Ask yourself this
question... Why is there an A/D converter chip on the current Tuner Dongles? Would it not
be better to convert the unadulterated demodulated Digital stream directly into a
192k/24bit audio card (or just 48k/16bit)? This new capability tells my Engineering mind
that the noise floor would go way down, which is the main deficiency with the current
cheap TV Tuner Dongles, keeping them from being used for low level narrowband reception.
http://www.silabs.com/Support%20Documents/TechnicalDocs/Si2157-short.pdf
-----Original Message-----
From: osmocom-sdr-bounces(a)lists.osmocom.org [mailto:osmocom-sdr-bounces@lists.osmocom.org]
On Behalf Of Jay Salsburg
Sent: Thursday, September 19, 2013 12:21 PM
To: osmocom-sdr(a)lists.osmocom.org
Subject: new TV Tuner Chip, the Si2177
I just received a Product Announcement from SILICON LABS. There new TV Tuner Chip, the
Si2177, appears to be able to demodulate Analog TV directly on the chip without software.
If I am not mistaken, this function is a new feature in TV Tuner Chips, which may provide
a much better SDR than current TV Tuner Chip Dongles, especially when it comes to noise
performance. It also eliminates almost all external components. RF Input Frequency Range -
42 to 870 MHz
Si2177 5th Generation Silicon TV Tuner ICs
http://www.silabs.com/Support%20Documents/TechnicalDocs/Si2177-short.pdf
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