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New article - HP 3245A Universal source
New article about Hewlett-Packard HP3245A obsolete universal generator. Teardown, repairs and tweak guide.
https://xdevs.com/fix/hp3245a/
Instrument firmwares, calibration test results verification and video covering operation are shown.
Contents include next items:
- Intro
- Disclaimer
- Initial inspection and basic disassembly
- Manuals references
- Repair workflow
- Boards condition check
- Diagnostics
- Firmware
- Calibration
- Performance verification
- Tweaks
- Main reference upgrade
- Additional output amplifier for 0.1x/0.01x gain
- Restoration summary
New repair article - HP 3456A DMM worklog.
Published article from TEKTRON covering repair, testing and performance improvement for Hewlett-Packard 3456A system DMM.
Also provided interesting questions and notes and methodology for calibration, precision stable voltage reference design and A/D testing.
Article is available here, in our Repairs section
Also available in: Atom