ABC logo?

Is the ABC's logo a Lissajous figure?
I've been playing with an app that creates these figures, trying to
replicate the logo, but no success.
Reply to
Jordan
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"Jordan"
** Originally, it was a moving scope screen pattern but has been stylised over the years.
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** The frequency components need to be in a 3:1 ratio and with a particular phase relationship.
Peaks in the lower (horizontal) frequency must coincide with zero crossings of the higher (vertical) frequency.
.... Phil
Reply to
Phil Allison
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Don McKenzie 

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Reply to
Don McKenzie
Yes.
You need to try harder.
Reply to
pedro
could be, with the horizontal sweep as a triangular wave and a 3:1 frequency ratio
what parameters doe the app allow you to tweak?
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For a good time: install ntp 

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Reply to
Jasen Betts
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A 1:3 ratio results in a curved line with unjoined ends. Same with 1:5, 1:7 etc. Only even numbers for Y result in ABC-like curves with endless loops.
Reply to
Jordan
"Jasen Bleatts" could be,
** NO.
Both are sine waves.
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... Phil
Reply to
Phil Allison
qliss3d: ok, that was easy to install, but it seems to be missing phase controls :( no activity since 2005 ...
poking round in the source to qliss3d I see you can adjust the phase with the keyboard.
punch in frequencies 1,3,3 and then click the main window and lean on the 'A' key for a while
then move to top slider left a few pixels to make it even better.
OTOH this guy used gnuplot:
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For a good time: install ntp 

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Reply to
Jasen Betts
That works, thanks. It's odd they didn't make that control more obvious for dummies like me.
Reply to
Jordan

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