Subject: Re: quasi-peak detector question
I recall it more historically relates to the motion of a
needle display. Kinda like a vu meter. Don't remember
about the decay time.
There is an analytical formula. Alas, I can't find my
copy. I think it came from some old HP app notes.
You
I looked into this in detail quite about 18 years ago while I was working
for HP. I had the quasi-peak adaptor that was used with the HP-8566 and
HP-8568 spectrum analyzers. I dug through the schematics for the adaptor.
There were two surprises.
The first surprise was when I read the standards doc
Ken Javor wrote (in
) about 'quasi-peak detector
question', on Tue, 23 Aug 2005:
>The quasi-peak detector is characterized by a charging time constant
>and a discharge time constant. If I want to analytically determine the
>transfer function of the detector for a given pulse duration and duty
I recall it more historically relates to the motion of a
needle display. Kinda like a vu meter. Don't remember
about the decay time.
There is an analytical formula. Alas, I can't find my
copy. I think it came from some old HP app notes.
You are right in that the most important is the rise
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