[time-nuts] Phase lock a VCXO to a standard 10MHz or to a GPS(1pps)
John Ackermann N8UR
jra at febo.com
Wed Aug 3 14:05:42 EDT 2005
Brooke Clarke wrote:
> Steven Bible says the Reflock II might be available in September 2005,
> see: http://gref.cfn.ist.utl.pt/cupido/reflock.html
> Have Fun,
> Brooke Clarke, N6GCE
I've kept fairly quiet about the Reflock II until we have more concrete
details, but as Brooke mentioned we're a month or so away from
production and TAPR plans to be showing it off at the Digital
Communications Conference in Santa Ana, CA this September.
The Reflock II is a universal synthesizer that can lock an oscillator at
virtually any frequency up to 250MHz (higher with a prescaler option) to
any reference in the normal frequency standard range (I really don't
know the upper limit), or to a 1pps source.
It's primarily designed for hams to use as a way to stabilize the local
oscillator of a microwave transverter, but there are obviously lots of
other interesting possibilities.
The phase performance of the GPS 1pps configuration hasn't been
thoroughly tested; that's one of the things we'll be working on once
more units are available. Since the whole loop is in software
(implemented in a CPLD chip) and the source is open, it will be easy to
play around with the loop parameters, or even add fancier filtering
We're pretty excited about this; together with the TADD-1 distribution
amplifier, this marks TAPR's (re)entry into the T&F field.
PS -- time-nuts with an interest in digital communication (things like
software defined radio) should consider attending the Digital
Communications Conference. Details are at http://www.tapr.org/dcc.
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