Statistics are cleared when the measurement function changes or when any of these commands is
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executed:
CALCulate:AVERage:STATe ON
CALCulate:AVERage:CLEar
INITiate
MEASure:<function>?
READ?
*RST
SYSTem:PRESet
All values are returned in the form +1.23450000E+01.
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When dB or dBm scaling is used, the CALC:AVER:AVER and CALC:AVER:SDEV queries return
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+9.91000000E+37 (not a number).
Keysight Truevolt Series Operating and Service Guide
SCPI Programming Reference
231