[time-nuts] Totally unrelated, but..

[Peter Reilley]

Is part of the problem that the level of noise that is of concern is
below what a scope can see anyway: PPB?   If the noise is not narrow
band it might also be not observable using a spectrum analyzer?

Pete.



On 12/7/2016 4:09 AM, Poul-Henning Kamp wrote:
> --------
> 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.
>