I have a very recent HP3456A manual in electronic format: 314-PAGES @ 600-DPI with nice halftones and full-page schematics printable on 11x17 paper. I'll email a copy ONLY to the first few folks who send me a good 600DPI "png" of Page-8-F-4 with Paragraphs 8-F-17,18,19,20,21,22,23 titled "A/D Adjustments". snipped-for-privacy@hotmail.com
Thanks from Stepan