I bought a module like that. If you set the output frequency to something that
divides evenly into 48MHz, then the output is quite stable. Otherwise, if you
set it to something else like 10MHz, the jitter is quite obvious on the scope.
It is fine for jobs like calibrating a frequency counter or
My experience is that the simple GPS-based 10 MHz reference works well with
the K3. The K3 is quoted as measuring frequency to 1 Hz accuracy, implying a
measurement time of the order of 1 second. That seems to be enough to smooth
out the jitter from the Neo-7M.
Of course, there are better
.
From: Matt Maguire <matt.vk...@gmail.com>
To: brian <als...@nc.rr.com>, <elecraft@mailman.qth.net>
Subject: Re: [Elecraft] Cheap ref osc to lock K3
Message-ID:
<f0e8602df208aaee.1d8b3c8d-2dd6-4846-a44b-d2cf0774c...@mail.outlook.com>
Content-Type: text/plain;
LA3ZA used a UBLOX NEO-7 GPS unit to lock his K3.
This $20 unit including complete development board can be obtained here.
http://www.ebay.co.uk/itm/301199083821
It's tiny, has a patch antenna (although a $10 active antenna works
better) and consumes under 60ma.
It can be powered from +5v or a
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