Other topics about Calibration
You can check the execution status of error correction for each channel with the error correction status.
The error correction status is indicated in the channel status bar at the lower part of the window by the symbols shown in the below table.
|
Symbol |
Execution status of error correction |
|
Cor (displayed in blue) |
Error correction: On (enabled for all traces) |
|
Cor (displayed in gray) |
Error correction: On (enabled for some traces) |
|
Off (displayed in gray) |
Error correction: Off |
|
--- (displayed in gray) |
Error correction: On (no calibration data) |
|
C? (displayed in blue) |
Error correction: On (Interpolation is being executed or the IF bandwidth, power level, power range, sweep time, sweep delay time, or sweep type is different from that when the calibration was executed.)
|
|
C! (displayed in blue) |
Error correction: On (Extrapolation is being executed.)
|
When one of the trace is set as DC monitor, COR status does not change even if the sweep time is changed.
You can check the status of the error correction actually executed for each trace with the trace status area.
For a trace of which error correction is executed, the applied calibration type is indicated in the trace status area by the symbols in the table below.
If none of the symbols described above is displayed, error correction is not executed for the trace.
You can check the acquisition status of the calibration coefficient for each channel with the calibration property.
The calibration property displays the acquisition status of the calibration coefficient between test ports for each channel in matrix format. The following example shows 2 port full calibration which is done on ports 1 and 2, and one of the response calibration is done on the ports for gain-phase measurement.
For impedance calibration in option 005, see Acquisition Status of Calibration Coefficient in the impedance measurement section.
Example of calibration property display
Follow these steps to turn on/off the calibration property display.
Press Channel Next (or Channel Prev) to select the channel of which you want to turn on/off the calibration property display.
Press Cal > Property. Each press toggles the on/off setting.
In the following cases, the calibration coefficients which are already acquired are cleared.
Executing preset clears all the calibration coefficients.
If S parameters are required to calculate the calibration coefficient for the specified calibration type and test ports and those required for the existing calibration coefficient overlap, executing the acquisition of the calibration coefficient (measuring necessary data and then clicking the Done softkey) clears the calibration coefficient of which necessary S parameters overlap. Taking the Example of calibration property display as an example, if you acquire the calibration coefficient of the response calibration for test port 1, calibration coefficients for s-parameters are cleared.