[time-nuts] Totally unrelated, but..

Poul-Henning Kamp phk at phk.freebsd.dk
Wed Dec 7 04:09:27 EST 2016

In message <CY1PR04MB234753318BF0F8B94BD16BF4E0820 at CY1PR04MB2347.namprd04.prod.
outlook.com>, "Van Horn, David" writes:

>So what is it that a monolithic regulator (linear) can do which
>is not observable on a scope or SA, which would cause a receiver
>to think it's getting a signal or significant noise in band?

You have to pay really good attention to specs on some linear regulators,
they are unstable in the weirdest places in the loadmap.

For instance, many regulators really want a specific minimum load, and
if you don't for just a nanosecond, they'll do a hissy fit.

A shunt resistor to ground often solves that, at the cost of 10-20mA.

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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