Keysight N9923-90001 User’s Guide 19OverviewFieldFox Manuals, Software, and Supplemental Help— Softkey Yellow indicates an active entry in process.— Softkey Grey indicates a key that is NOT available.Safety NotesThe following safety notes are used throughout this manual. Familiarizeyourself with each of the notes and its meaning before operating thisinstrument. More pertinent safety notes for using this product are located inChapter 17, “Safety Considerations”, on page 247.Denotes a hazard. It calls attention to a procedure that, if not correctlyperformed or adhered to, would result in damage to or destruction of theproduct. Do not proceed beyond a caution note until the indicatedconditions are fully understood and met.Denotes a hazard. It calls attention to a procedure which, if not correctlyperformed or adhered to, could result in injury or loss of life. Do notproceed beyond a warning note until the indicated conditions are fullyunderstood and met.