[time-nuts] Testing frequency using NTP

[Poul-Henning Kamp]

In message <000301c924c7$26073c30$0300a8c0 at pc52>, "Tom Van Baak" writes:
>> I'm wondering about the possibility of checking the frequency of my
>> oscillator by using a NTP synced RT Linux system. What I'm thinking of
>
>An "all-PC" frequency counter is a great idea. 

Actually, the best hardware for the job is the Soekris NET4501
which can timestamp a signal to a quarter microsecond.

That's why we use it for NTP servers in the first place.

All the software you need is in the FreeBSD kernel, and there
is a handy userland program to get the measurments into ascii
format (the earlier mentioned ppsapitest program).

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