[BC] Modulation measurement

[Gary Blau]

Here's one oldie but goodie on the topic:
http://tinyurl.com/ag495w

g

Goran Tomas wrote:

> Can anyone help me in determining what is the required peak response
> time (attack) for valid modulation measurements according to the FCC
> rules?
> 
> The instrument that has a response time of say 150 us will not display
> the same peak deviation as the instrument that has nearly 1 ms
> response time, nor will the one that has "sample-accurate" response
> (let's say 48 kHz sampling which would give 21 us). This gives some
> room for interpretation of what the actual peak modulation is.
> 
> I'm sure there is a standard that proscribes the ballistics compliance
> of these modulation meters/analyzers? I mean, the modulation analyzer
> manufacturers have to pick some values to stick in their boxes (or the
> users have to, in case that decisions is left to them).