[snip]
> Analog storage scopes used a very-high-persistence phosphor which
> allowed the image to last for a number of seconds... As far as I
> know, no one makes them anymore.
>
> -Andy
>
> === Andrew Warren - fastfwd@ix.netcom.com
> === Fast Forward Engineering - Vista, California
> === http://www.geocities.com/SiliconValley/2499
>
er,not quite. If the phosphor was long persistance every sweep would
remain on the screen. There is some sort of mesh inside the tube which
can preserve the scan when energised. Gradually the electrons leak away
and the trace fades. When storage mode is de-energised, the scope
reverts to normal display.