Re: [Discuss-gnuradio] cable modem tuner now integrated

[Steve Schear]

At 03:25 PM 11/25/2001 -0800, you wrote:
> Hi Folks,
>
> I've now got a very nice cable modem tuner module (eval board) hooked
> into GNU Radio.  From a hardware point of view it was a zero glue
> operation.  Just a couple of cables and rigging up a power supply.
>
> FYI, it's a Microtune 4937DI5 3x7702 module.  Tunes from 50M to 860M
> and has about a 6MHz wide IF centered at 5.75M.  Very convenient for
> our 20M sample A/D board.  Cables right up.  You control it by bit
> banging it over the parallel port.  It has a I2C interface plus a few
> additional bits.
>
> I've attached some FFT graphs from various parts of the spectrum.
> Lots of good stuff to work with.  The center of the IF is indicated at
> 5.75MHz.  The displayed frequency axis values don't currently take

Kudos!  A major step forward.

When I first came across these I had some reservations regarding their 
dynamic range.  Have you or do you have plans to determine if this is 
likely to be a problem for the sorts of broadband signals of interest?

steve