Memory in a function generator, when is it usefull ?

[giacomo]

Hi, i was considering to buy a basic function generator (like a siglent SDG805 or an instek from the SFG-1000 series).

But looking at the varios models i think to not understand what is a waveform memory in a function generator and when is it usefull to have a lange amount of memory...

[SebG]

Usually the memory is so you can store your own arbitrary waveforms.  Most function generators will have basic waveforms like sine, triangle, square wave, or some other like gauss or noise.  But if it doesn't have what you need then you can create your own and upload it to the function gen.  The more memory you get the more points your arbitrary wave can have, ie more resolution.