Keysight Technologies E4981A, Руководство по программированию

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372 Appendix E
Error Messages
Warning Messages (WARNING)
Warning Messages (WARNING)
Warning messages are displayed to warn users. They are displayed in the lower row of the
display of the E4981A. You cannot read them out using the SCPI command.
WARNING: Need corr meas
When the OPEN correction, SHORT correction or LOAD correction is ON, this is
displayed when you change the setup of the cable length or measurement frequency shift (1
MHz). In this case, the OPEN correction, SHORT correction and LOAD correction are
automatically turned OFF.
WARNING: Need load meas
This is displayed when you turn ON the LOAD correction from the front panel although
the setups of the cable length and measurement frequency shift (1 MHz) differ from those
when measuring/setting up the LOAD correction data. In this case, the LOAD correction is
turned ON, but you need to measure the LOAD correction data again for accurate
measurement.
WARNING: Need open meas
This is displayed when you turn ON the OPEN correction from the front panel although the
setups of the cable length and measurement frequency shift (1 MHz) differ from those
when measuring/setting up the OPEN correction data. In this case, the OPEN correction is
turned ON, but you need to measure the OPEN correction data again for accurate
measurement.
WARNING: Need short meas
This is displayed when you turn ON the SHORT correction from the front panel although
the setups of the cable length and measurement frequency shift (1 MHz) differ from those
when measuring/setting up the SHORT correction data. In this case, the SHORT correction
is turned ON, but you need to measure the SHORT correction data again for accurate
measurement.
WARNING: Out of limit
This is displayed if the correction data is out of the valid range when measuring the
correction data. The valid range for each type of correction is as follows.
In the above table, Y is the measured admittance value, Z is the measured impedance
value, and Zref is the LOAD correction standard definition value.
WARNING: Improper high/low limits
The upper limit value is less than the lower limit value. Set the lower limit value to less
than the upper limit value.
Type of correction Valid range
OPEN correction |Y| < 20
μ
S
SHORT correction |Z| < 20 Ω
LOAD correction |Zref| ∞ 0.9 < |Z| < |Zref| ∞ 1.1