Having never heard of SigmaPlot previously. it appears that it can export in at least one vector format. That can be exploited.
if the workflow here is OLE, I'm a bit amazed that it still works, and if I had stewardship for any instances of it, there would be an active migration plan.
If the workflow is copy-into-document, that likewise needs to be upgraded to something more transparent & sustainable.
if the workflow is export/save from SigmaPlot, and import-by-reference into FM, the details need review.
Export as some vector format that FM supports. From a legacy standpoint this might include DWG, DXF, EPS, PDF, SVG, perhaps WMF.
These should render to PDF and print as full-quality vector: no rasterization, and no judder.
For optimal future support, PDF is the most capable file format, but not the most compact. If only print and PDF are required, EPS still works, and cleanly embeds fonts. For wider use, esp. HTML/XML, SVG is worth a look, but font embedding can be a challenge (I usually have to outline before save, making it no longer selectable text).
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