Re: [Discuss-gnuradio] Are microtune 4707's worth having?

[Eric Blossom]

On Wed, Nov 10, 2004 at 05:18:08PM -0500, Tom Huppi wrote:
> On Wed, 10 Nov 2004, Eric Blossom wrote:
> 
> > On Wed, Nov 10, 2004 at 02:41:38AM -0500, Tom Huppi wrote:
> > >
> > > There are a box of 108pc on e-bay w/ no bids for $50.
> > >
> > > I'm sorry for my lack of knowledge.  I see more IF info related to
> > > the 49xx pieces (on microtune's websiite), but one of the USRP
> > > modules seems to have a 4702.
> >
> > I sent a message to the seller asking for a data sheet.
> > I'll let you know what I find out.
> 
> I should have mentioned that even if the items are usefull, I
> don't need to be the one who gets them, though I would like to see
> them go to good homes (i.e., feeding into CPU's executing GnuRadio
> code.)  Put another way, don't hesitate to bid on them, but maybe
> we can avoid a bidding war.  I'm happy to try to get them and
> divide them amoungst interested parties (lacking the 'haxpertise'
> to do much more at this point), but I don't want to waste my
> time/money on useless items.

I'd be delighted for you do get them and distribute them.  I'll let
you know if I get a data sheet.  

Squinting at the summary I found on the Microtune site, these appear
to be EuroDOCSIS tuners.  They have a 36.125 MHz IF that's 8 MHz wide.
They require both 5V and 33V, which is kind of a bummer.  On etay it
notes that "the IF outputs are designed to interface directly with a
standard SAW filter", which  makes me think it might require an
external SAW filter.  Not sure about that.

> I've been dividing my time between reading the site (including
> starting on some of these links), hardware research, and FreeBSD
> build issues.

Glad to hear you're working on FreeBSD.  The more platforms the merrier.

Eric