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Re: [Discuss-gnuradio] Schematics for tvrx frontend?

From: Harald Welte
Subject: Re: [Discuss-gnuradio] Schematics for tvrx frontend?
Date: Mon, 18 Apr 2005 17:24:58 +0200
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On Sun, Apr 17, 2005 at 12:59:29PM -0700, Matt Ettus wrote:
> Quoting Harald Welte <address@hidden>:
> > Hi!
> >
> > Since my TVRX frontend just arrived the other day (even without having
> > to pay any taxes, this has never happened for anything I ordered from
> > the US so far), I would be interested in the schematics.
> >
> > I've got a number of cheap (USD8 each) Comtech (.com.tw) DVB-T and DVB-S
> > tuner samples (both have 0.9Vpp I and Q output, and I'd like to
> > experiment with creating frontends for them.
> >
> > So to start lazy, I would try basing my frontend on the TVRX schematics
> Thanks for reminding me.  I've put them up on the ettus.com download page.


I was really surprised that there basically is no circuitry (like
opamp-based impedance matching) between the tuners' output and the ADC.

- Harald Welte <address@hidden>                         http://gnumonks.org/
"Privacy in residential applications is a desirable marketing option."
                                                  (ETSI EN 300 175-7 Ch. A6)

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