Stable source shows drifting measurement. Manual’s Solution: This indicates a failing timebase reference. The manual includes a test point (TP5) for the 10 MHz OCXO output. Connect a scope; look for excessive jitter or harmonic distortion. The adjustment procedure allows you to trim the reference capacitor or replace the OCXO module (part number specified in the BOM).
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However, like any sophisticated electronic instrument, the FM8900S can experience configuration errors, sensor drift, communication failures, or hardware malfunctions. When these issues arise, the becomes the single most valuable document for technicians, engineers, and maintenance teams. Stable source shows drifting measurement