[time-nuts] TAPR Clockblock and USRP (GnuRadio) anyone ?

Poul-Henning Kamp phk at phk.freebsd.dk
Sat Jan 13 18:24:06 UTC 2007


In message <1025.134.53.50.125.1168708295.squirrel at fluffles.febo.com>, jra at febo.com writes:
>>
>> I see that TAPR has the "clockblock" PLL gadget for sale now
>> and that Matt Ettus USRP now sports a convenient facility for
>> 64MHz clock input, anyone tried the combination yet ?
>
>I haven't tried it yet, but I'm fairly nervous about the phase noise; the
>ICS-525 chip isn't really designed for RF applications.  But of course,
>there's no harm in trying it out...
>
>Realistically, I think the best answer is a Reflock-II board locking a
>good quality 64MHz VCXO to a 10MHz source.

Actually the USRP v4 seems to have a VCXO already:

	http://gnuradio.org/svn/usrp-hw/trunk/USRP_REV_4_2/clock.pdf



-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
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