MOTM

On 5/26/07, Greg James put forth:
>So I've read here and on some other lists about people moving certain
>modules on or off various power rails to isolate them from noise, etc. Is
>there anywhere I can find some good, comprehensive, guidelines for the what,
>why, how and when to do this?
>
>For example, one recommendation I read is to isolate all CVAs from 'dirty'
>modules. Another is to isolate all modules with digital circuitry. And
>another person wrote about LEDs causing problems.

What's a CVA??

>I'm just looking for "best practices" here. I understand that in the end,
>every system can have it's own quirks. But high-level rules of thumb would
>be helpful.

Well, I would say that moving modules around to isolate them from
power supply noise is very much fine tuning.  Each module has its own
power supply filtering, and in some cases the distribution boards
have their own power supply filtering.  In addition, many modules use
local voltage regulators which provide a massive amount of ripple
rejection.  The MOTM VCO's have voltage regulators which provide
immunity to small changes in supply voltage.  The MOTM-120 has its
own regulator for its digital circuitry.  So unless you are
experiencing problems, there shouldn't be any need to move modules
around.

Imho, putting all of the "dirty" modules on one stem is going to have
a cumulative effect.  I think it would be better to add more
filtering to the modules that are making noise, thereby solving the
problem at its source, rather than trying to arrange them with your
other modules in such a way that will reduce the effect that noise
has.