Keysight Technologies C Series - Troubleshooting

Keysight N9915-90020 User’s Guide 731
Noise Figure Mode (Option 356)
Troubleshooting
Troubleshooting
Some measurements can result in invalid results (NaNs). In these cases the
FieldFox’s Noise Figure Option 356 displays the following:
— Red X on the NaN point
— Marker readout displays: “–––”
— SCPI will return its NaN representation (i.e., 9.91E+37)
Figure 29-32 Example of an invalid measurement