[time-nuts] purpose of time of day display units

Poul-Henning Kamp phk at phk.freebsd.dk
Sun Jan 22 04:04:31 EST 2017

In message <537E808D-731C-42DE-90F3-BEC55363B7AC at sfr.fr>, Mike Cook writes:

>All that these units do is merely display the time of day and
>sometimes the date, typically by means of seven segment LED displays,
>of the time code inputted to them (typically IRIG-B, I'm guessing).

I can imagine two reasons:

A) Trying to explain a $1M set of racks keeping track of time, without
   them actually showing the time is a lot harder.

B) Visual indication that your IRIG-B is fine.

Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.

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