When the below conditions change:
IF bandwidth
Power level
Power range
Sweep time / Sweep delay time
Sweep type
Number of points
When these conditions change, interpolation is executed. Error correction status symbol, C? is displayed at the channel status bar at the lower part of the window. This indicates that the changes in the conditions are within an acceptable range. At this point, calibration is advisable but not mandatory.
When the below conditions change:
Start/Stop
Centre/Span
When these conditions change and the sweep span is extended, the extrapolation is executed. Error correction status symbol, Hence C! is displayed at the channel status bar at the lower part of the window. This indicates that the changes in the conditions are far from the acceptable range. At this point, calibration is mandatory.
To change the number of measurement points, refer to Setting the measurement points.
To change the sweep parameter, refer to Setting the sweep parameter.