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[20170503]
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Adventures in Time, part 1: Interfacing an Oven Controlled Crystal Oscillator to a Computer Running NetBSD
I've stumbled across this article via
the Dragonfly BSD Digest:
Tobias 'tnn' Nygren wrote about his aventurs in time,
with part one on
Interfacing an Oven Controlled Crystal Oscillator to a Computer Running NetBSD.
This first article in a blog series starts by
describing regular and oven ontrolled crystal oscillators,
then goes on in describing the hardware setup and how it is
connected to a computer. In this case, a Banana Pi running
NetBSD/evbarm is used which (of course) also has its own
clock. Oscilloscope measurements show differences in
quality of signals and why an adapter is needed to adjust
the system's clock frequency (including changes to the
NetBSD kernel).
In the next post Tobias will describe how to calibrate the clock with NTP.
Stay tuned and
have an eye on his blog!
[Tags: ntp, time]
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