Hello
While searching for a good solution to .AC viewing of interpolation and decimation, among the results (simple multiplication, delays and VCCS/VS, VCCS and behavioural resistor), the varistor seemed to be the best approach. The Filter can now be viewed in frequency domain, too, for interpolation/decimation. For those interested, the schematic with the up-/downsampling section is here:
Files/Filter/Filter/Up_Down_Sampling.asc
Vlad
