chihaxinh only want a cheap scope to make a curve tracer like a tektronix 576 or 577.
No need of an expansive R§S DSO to do this.
I didn't say he needs an expensive DSO for that. I'm sure even an el-cheapo Rigol delivers decent enough X/Y for a curve tracer. In fact, even one of the old HP 54600 DSOs with MegaZoom ASIC from the mid-'90s will probably do a better job at X/Y, and these scopes often go for little money.
My simple point was just because the Tek sux at X/Y doesn't mean all DSOs do, contrary to your statement.
The mentioned iwatsu ain't cheap.
It certainly wasn't when it was new. But that's true for most analog boat anchors.
It is no old boatanchor either. Very nice scopes and relatively modern. Production only ceased a few years ago.
Yes, it's a newer analog scope with microprocessor controls which came out in the mid-'90s and which Iwatsu kept in their portfolio in various stages of refresh (A, AP) until 2011 or so, and I'm not saying it's a bad
analog scope. But at the end of the day it's still an analog scope, and suffers from pretty much all of the shortcomings an analog scope has over a decent DSO. Iwatsu pretty much only had them for certain (japanese) customers that required a programmable analog scope for some of their ATEs.
Apparently there are still companies that make analog scopes (GW Instek, Atten). That doesn't mean buying an analog scope in this day and age is a good investment.