Re: [IRCA] Review with screenshots of the si4735 Receiver on a chip

[satya@xxxxxxxxxxxx]

Hey Nick/all:

It took a while, but I eventually stumbled on it by doing some creative
searches in the UltralightDX group archives.

The uber-site for Silicon Labs products appears to be:
          http://delanet.ru/content/view/782/39/1/1/
In addition to a lot of tech docs on SILABS products, there is a VERY
interesting graphic of a young girl hitting a rat with a broom over and
over again!

Kevin


> At 02:54 6/5/2009, satya@xxxxxxxxxxxx wrote:
>
>>Hi all:
>>
>>For those interested in what is inside the new DSP radios coming from
>>Tecsun, here is a web page (in German, but Goggle Translate does a pretty
>>good job) of one person's experience with an evaluation board version:
>>
>>http://www.franzis.de/elo-das-magazin/entwicklung-und-projekte/kurzwellenempfaenger/testbericht-si4735
>>
>>The basic specs of this si4735 version are substantially similar to the
>>si4730/31 that is apparently in the Tecsun PL-300WT.  Among other things,
>>on AM, selectivity can be programmed to 1, 2, 3, 4, or 6 khz (this
>> appears
>>to be per sideband, so double those numbers to get the type of spec we
>>normally see).
>
> How do you find this stuff Kevin??   I've been running around in circles
> the last couple of days trying to get any information on this evaluation
> board, which is available through Mouser Electronics, though not stocked
> (they do stock the 4731 board however, as does Avnet...but no
> documentation.
>
> I sure couldn't find this even as a part on the Silicon Labs website, let
> alone a data sheet.
>
>   The only thing I've come up with is the Si4731-Demo  which is actually
> rather fun, and doesn't cost much more than the Tecsun radio, $64.75 and
> in stock at Mouser.  Details at
> https://www.silabs.com/Pages/default.aspx and search for Si4731-Demo.
> You have to register to get the documentation; it's free, though I've
> now had to re-register twice, as their log-in software doesn't seem to
> remember things very well.
>
> It's stand alone, but you're limited as to what functions are available.
> Looks as if it has selectable selectivity.  Wonder if this qualifies as an
> Ultralight, hi
>
> best wishes,
>
> Nick
>
>
> *****************************
> Nick Hall-Patch
> Victoria, BC
> Canada
>
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