At 08:58 AM 8/4/97 PST, you wrote:

>        My favorite tome on this subject (which I haven't seen since grad
>     school days) was the manual for HP's 8-digit DMM. They had more ways
>     of figuring out RMS than you can shake a stick at. I seem to remember
>     a particularly novel random sampling method which worked in a
>     statistical fashion. For reasonably stationary signals (in the
>     statistical sense), I would imagine this to be the easiest to
>     implement on a PIC...

Yes HP had some great algorithms - I miss their discussions in the old
HP journals in the middle 80's. I decided to consider the DSP approach
by sum of squares etc, Harold suggested a simple algorithm - all I have
to do now is the most efficient maths...

rgds

mike
Perth, Western Australia