[time-nuts] Ideas for a long-wave receiver sought

Marc Balmer marc at msys.ch
Mon Jun 22 05:30:56 EDT 2009


Am 22.06.2009 um 10:14 schrieb Poul-Henning Kamp:

> In message <38553AAD-ECC6-4AF8-90B3-42BBEC366CA6 at msys.ch>, Marc  
> Balmer writes:
>
>> I want to build a small, cheap, yet precise long-wave receiver which
>> can be
>> tuned from the computer in the 2KHz - 200 KHz range (the intended use
>> is to receive various time signal stations).
>>
>> Does a chip for such a receiver exist?  Should I take the SDR route?
>> I designed a DCF77 receivers some years ago, but I need something
>> more flexible (and a bit more modern...)
>
> Go SDR.
>
> There are ARM7 chips now that have sufficient ADC quality  to do the
> job.

Ok, thanks.  I happen to have some Overp Earth boards, OMAP 3503
Application Processor with ARM Cortex-A8 CPU, do you think these
will handle the job? (runnin at 600 MHz).  They say it makes up 1200
dhrytsone mips

(www.gumstix.com)


>
> See for instance: http://phk.freebsd.dk/AducLoran

Thanks for the pointer, I already found that, nice work!

- Marc

>
> Poul-Henning
>
> -- 
> Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
> phk at FreeBSD.ORG         | TCP/IP since RFC 956
> FreeBSD committer       | BSD since 4.3-tahoe
> Never attribute to malice what can adequately be explained by  
> incompetence.
>
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