Re: [Discuss-gnuradio] Tuner modules?

[Eric Blossom]

On Tue, Nov 30, 2004 at 08:24:03AM -0500, Chuck Swiger wrote:
> At 08:24 PM 11/29/2004 -0800, you wrote:
> >On Mon, Nov 29, 2004 at 10:20:58PM -0500, James Hall wrote:
> >> Would these be suitable for Gnuradio use?
> >> 
> >http://www.windsordistributors.com/onlinestore/index.aspx?tabindex=0&tabid=1&productid=66&directoryid=-1&ctrl=productdetails
> > 
> >
> >> I happened to stumble across them earlier. They're 50 cents/pc but it's a
> >> min. order of 100.
> >
> >They might work.  In any event you'll need a real data sheet to figure
> >out how to use them.  If you can't get a data sheet I'd pass on them.
> 
> FWIW I'm focusing on Tom Huppi's ebay tuners, the Microtune 4707 PH5 
> 3X7827. You can
> get a data sheet for the 4706 PH5 (3x8264, 3x8287, 3x8320) which I'm going 
> to
> /assume/ is close enough. Have traced one 5vdc pin back to an IC which 
> means the
> other p/s pin must be the 33v.   Other than that I'm trying to get an I2C 
> bus going
> to talk to it, plus learn about I2C ;)
> 
> --Chuck

As you may already know, there's i2c code already in the
tree that bit bangs the parallel port.

Take a look at
gnuradio-core/src/lib/io/microtune_xxxx_eval_board.{h,cc} for examples
on how to use it.

For the 4707 PH5 you'll need to figure out the I2C address it's
listening on, the format of the commands, switch over points between
VHF Low, VHF High, UHF, etc.  To get an idea of the kind of commands
and differences between modules, take a look at
gnuradio-core/src/lib/io/microtune_{4702,4937}.{h,cc}

A call to microtune might turn up a data sheet.

The I2C spec is available here:
http://www.semiconductors.philips.com/acrobat/literature/9398/39340011.pdf

Eric