Keysight N1911A Programming Manual page 220

4 CALibration Subsystem
– If this command is set to ON and TRIGger[SEQuence[1]|2]:COUNt is set to a
– If this command is set to ON (for dual channel, at either measurement channel)
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value >1, the error –221, "Setting conflict" occurs.
when a P-Series power sensor is connected (for dual channel, at either
measurement channel) and is in the wait-for-trigger state for external trigger
buffering, the error –224, "Illegal parameter value" occurs.
N1911A/1912A P-Series Power Meters Programming Guide