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:
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In message <cy1pr04mb234753318bf0f8b94bd16bf4e0...@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.
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